30RA 040-240 B Air-Cooled Liquid Chillers with Integrated Hydronic Module
Nominal cooling capacity 39-245 kW 50 Hz

AQUASNAP

Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products.
For the operation of the control please refer to the Pro-Dialog Control manual for the 30RA/RH - RY/RYH B series
Installation, operation and maintenance instructions
Contents 1 - INTRODUCTION..... 4 1.1 - Installation safety considerations.....4. 1.2 - Equipment and components under pressure....4 1.3 - Maintenance safety considerations.....5 1.4 - Repair safety considerations.....- Preliminary checks..... 7 2.1 - Check equipment received.....7. 2.2 - Moving and siting the unit......- Dimensions/CLEARANCES..... - PHYSICAL DATA...... - ELECTRICAL DATA..... - APPLICATION DATA...... 13 6.1 - Unit operating range......13 6.2 - Evaporator water flow rates.....13 6.3 - Minimum water flow rate.....13 6.4 - Maximum evaporator water flow rate.....13 6.5 - Water loop volume......13 6.6 - Unit operating range at full and part load....14 6.7 - Pressure drop in the plate heat exchangers....- ELECTRICAL CONNECTION..... 15 7.1 - Control box.....15 7.2 - Power supply......16 7.3 - Voltage phase imbalance (%).....16. 8 - Recommended wire sections.... 17 8.1 - Field control wiring.....- WATER CONNECTIONS..... 18 9.1 - Operating precautions and recommendations....18. 9.2 - Hydronic connections......18 9.3 - Frost protection......- NOMINAL SYSTEM WATER FLOW CONTROL.... 21 10.1 - Water flow control procedure....21 10.2 - Pump pressure/flow rate curves.....23 10.3 - Available static system pressure.....- START-UP...... 24 11.1 - Preliminary checks......24 11.2 - Actual start-up.....24. 11.3 - Operation of two units in master/slave mode....- MAINTENANCE..... 25. 12.1 - General maintenance of the refrigerant circuit....25 12.2 - Refrigerant charge.....25 12.3 - Electrical maintenance......26. 12.4 - Condenser coil.....- AQUASNAP MAINTENANCE PROGRAMME..... 28. 13.1 - Maintenance schedule.....28. 13.2 - Description of the maintenance operations....- start-up cHecklist for 30RA Liquid chillers (use for job file).. 30
The drawings in this document are for illustrative purposes only and is not part of any offer for sale or contract.
1 - INTRODUCTION Prior to the initial start-up of the 30RA units, the people involved in the on-site installation, start-up, operation, and maintenance of this unit should be thoroughly familiar with these instructions and the specific project data for the installation site. The 30RA liquid chillers are designed to provide a very high level of safety during installation, start-up, operation and maintenance. They will provide safe and reliable service when operated within their application range. This manual provides the necessary information to familiarize yourself with the control system before performing start-up procedures. The procedures in this manual are arranged in the sequence required for machine installation, start-up, operation and maintenance. Be sure you understand and follow the procedures and safety precautions contained in the instructions supplied with the machine, as well as those listed in this guide. Earthquake resistance has not been verified for these units. 1.1 - Installation safety considerations This machine must be installed in a location that is not accessible to the public and protected against access by non-authorised people. After the unit has been received, when it is ready to be installed or reinstalled, and before it is started up, it must be inspected for damage. Check that the refrigerant circuit(s) is (are) intact. Ensure especially that no components or pipes have shifted (e.g. following a shock). If in doubt, carry out a leak tightness check and verify with the manufacturer that the circuit integrity has not been impaired. If damage is detected upon receipt, immediately file a claim with the shipping company. Do not remove the skid or the packaging until the unit is in its final position. These units can be moved with a fork lift truck, as long as the forks are positioned in the right place and direction on the unit. The units can also be lifted with slings, using only the designated lifting points marked at the four corners at the unit base. These units are not designed to be lifted from above. Use slings with the correct capacity, and always follow the lifting instructions on the certified drawings supplied with the unit. Safety is only guaranteed, if these instructions are carefully followed. If this is not the case, there is a risk of material deterioration and injuries to personnel. Never cover any safety devices. This applies to the globe valve in the water circuit and the globe valve(s) in the refrigerant circuit(s). Ensure that the valves are correctly installed, before operating the unit.

1.3 - Maintenance safety considerations Engineers working on the electric or refrigeration components must be authorized and fully qualified to do so (electricians trained and qualified in accordance with IEC 60364 Classification BA4). All refrigerant circuit repairs must be carried out by a trained person, fully qualified to work on these units. He must have been trained and be familiar with the equipment and the installation, and he must wear the necessary protective items (gloves, glasses, protective clothes, safety shoes). Soldering and welding: Component, piping and connection soldering and welding operations must be carried out using the correct procedures and by qualified operators. Pressurised containers must not be subjected to shocks, nor to large temperature variations during maintenance and repair operations. Never work on a unit that is still energized. Never work on any of the electrical components, until the general power supply to the unit has been cut using the disconnect switch in the control box. If any maintenance operations are carried out on the unit, lock the power supply circuit in the open position ahead of the machine. If the work is interrupted, always ensure that all circuits are still deenergized before resuming the work. ATTENTION: Even if the unit has been switched off, the power circuit remains energized, unless the unit or circuit disconnect switch is open. Refer to the wiring diagram for further details. Attach appropriate safety labels. Operating checks: During the life-time of the system, inspection and tests must be carried out in accordance with national regulations. The information on operating inspections given in annex C of standard EN378-2 can be used if no similar criteria exist in the national regulations. Safety device checks (annex C6 EN378-2): The safety devices must be checked on site once a year for safety devices (high-pressure switches), and every five years for external overpressure devices (safety globe valves). Contact Carrier Service for a detailed explanation of the high-pressure switch test method. If the machine operates in a corrosive environment, inspect the protection devices more frequently. Regularly carry out leak tests and immediately repair any leaks.
1.4 - Repair safety considerations All installation parts must be maintained by the personnel in charge, in order to avoid material deterioration and injuries to people. Faults and leaks must be repaired immediately. The authorized technician must have the responsibility to repair the fault immediately. Each time repairs have been carried out to the unit, the operation of the safety devices must be re-checked. If a leak occurs or if the refrigerant becomes polluted (e.g. by a short circuit in a motor) remove the complete charge using a recovery unit and store the refrigerant in mobile containers (careful in case the refrigerant decomposes due to high temperature increases, as the decomposition products are dangerous). If a leak occurs, evacuate all refrigerant, repair the leak detected and recharge the circuit with the total R407C charge, as indicated on the unit name plate. Never top up the charge. Only charge liquid refrigerant R407C at the liquid line. The 30RA 040 to 240 units use R407C refrigerant. These units are essentially sold in Europe, and their operating range is limited to an outside air temperature of approximately 45C. Always ensure you are using the correct refrigerant type before recharging the unit. Charging any refrigerant other than the original charge type (R407C) will impair machine operation and can even lead to a destruction of the compressors. The compressors operating with R407C are charged with a synthetic polyolester oil. R407C units have a hermetic refrigerant circuit and the original charge needs not be topped up, as R407C is a zeotropic refrigerant. Do not use oxygen to purge lines or to pressurize a machine for any purpose. Oxygen gas reacts violently with oil, grease, and other common substances. Never exceed the specified maximum operating pressures. Verify the allowable maximum high- and low-side test pressures by checking the instructions in this manual and the pressures given on the unit name plate. Do not use air for leak testing. Use only refrigerant or dry nitrogen. Do not unweld or flamecut the refrigerant lines or any refrigerant circuit component until all refrigerant (liquid and vapour) has been removed from chiller. Traces of vapour should be displaced with dry air nitrogen. Refrigerant in contact with an open flame produces toxic gases. The necessary protection equipment must be available, and appropriate fire extinguishers for the system and the refrigerant type used must be within easy reach. Do not siphon refrigerant.

Avoid spilling liquid refrigerant on skin or splashing it into the eyes. Use safety goggles. Wash any spills from the skin with soap and water. If liquid refrigerant enters the eyes, immediately and abundantly flush the eyes with water and consult a doctor. Never apply an open flame or live steam to a refrigerant container. Dangerous overpressure can result. If it is necessary to heat refrigerant, use only warm water. During refrigerant removal and storage operations follow applicable regulations. These regulations, permitting conditioning and recovery of halogenated hydrocarbons under optimum quality conditions for the products and optimum safety conditions for people, property and the environment are described in standard NFE 29795. Any refrigerant transfer and recovery operations must be carried out using a transfer unit. A 3/8 SAE connector on the manual liquid line valve is supplied with all units for connection to the transfer station. The units must never be modified to add refrigerant and oil charging, removal and purging devices. All these devices are provided with the units. Please refer to the certified dimensional drawings for the units. Do not re-use disposable (non-returnable) cylinders or attempt to refill them. It is dangerous and illegal. When cylinders are empty, evacuate the remaining gas pressure, and move the cylinders to a place designated for their recovery. Do not incinerate. Do not attempt to remove refrigerant circuit components or fittings, while the machine is under pressure or while it is running. Be sure pressure is at 0 kPa before removing components or opening a circuit. Any manipulation (opening or closing) of a shut-off valve must be carried out by a qualified and authorised engineer. These procedures must be carried out with the unit shut-down. NOTE: The unit must never be left shut down with the liquid line valve closed, as liquid refrigerant can be trapped between this valve and the expansion device. (This valve is situated on the liquid line before the filter drier box.) Do not attempt to repair or recondition any safety devices when corrosion or build-up of foreign material (rust, dirt, scale, etc.) is found within the valve body or mechanism. If necessary, replace the device. Do not install safety valves in series or backwards. CAUTION Do not step on refrigerant lines. The lines can break under the weight and release refrigerant, causing personal injury. No part of the unit must use feet, racks or supports during operation. Periodically monitor and repair or if necessary replace any component or piping that shows signs of damage. Do not climb on a machine. Use a platform, or staging to work at higher levels.
Use mechanical lifting equipment (crane, hoist, etc.) to lift or move heavy components such as compressors or plate heat exchangers. For lighter components, use lifting equipment when there is a risk of slipping or losing your balance. Use only original replacement parts for any repair or component replacement. Consult the list of replacement parts that corresponds to the specification of the original equipment. Do not drain water circuits containing industrial brines, without informing the technical service department at the installation site or a competent body first. Close the entering and leaving water shutoff valves and purge the unit hydronic circuit, before working on the components installed on the circuit (screen filter, pump, water flow switch, etc.). Periodically inspect all valves, fittings and pipes of the refrigerant and hydronic circuits to ensure that they do not show any corrosion or any signs of leaks.

3 - Dimensions/CLEARANCES 30RA 040-080

30RA 090-160

1 1000

30RA 200-240

Legend: All dimensions are given in mm Control box Water inlet
NOTE: A Non-certified drawings. Refer to the certified dimensional drawings supplied with the unit or available on request, when designing an installation. For the location of fixing points, weight distribution and coordinates of the centre of gravity refer to the certified dimensional drawings. In multiple-chiller installations (maximum four units), the side clearance between the units should be increased from 1000 to 2000 mm. The height of the solid surface must not exceed 2 m.
Water outlet Required clearances for air flow Recommended clearances for maintenance C Air outlet, do not obstruct Power cable entry B
Multiple chiller installation NOTE: If the walls are higher than 2 m, contact the factory.
Solid surface Solid surface

4 - PHYSICAL DATA

30RA 040 Nominal cooling capacity* kW 39.4 Operating weight with hydronic module kg Single pump 526 Dual pump 606 Operating weight without hydronic module 49.060 57.15 - 070 67.12.5 - 080 79.18 - 090 89.100 97.120 115.140 135.12.5 12.151.200 198.240 245.6 16.6
Refrigerant charge kg R407C Circuit A Circuit B - - Compressors Quantity, circuit A Quantity, circuit B No. of capacity steps Minimum capacity %
Hermetic scroll compressor, 48.3 r/s 2 - - - - - 50 50
Control type PRO-DIALOG Plus Condensers Grooved copper tubes, aluminium fins Fans Quantity Total air flow (high speed) l/s Speed (high/low speed) r/s Evaporator Water volume l Max. water-side operating pressure kPa Option without hydronic module Unit with hydronic module Axial Flying Bird fans with rotating shroud 11.5/5.8 11.5/5.8 11.5/5.8 15.6/7.8 11.5/5.8 11.5/5.811.5/5.8 15.6/7.8 15.6/7.8 11.5/5.815.6/7.8 Direct-expansion welded plate heat exchanger 3.6 4.6 5.9 6.5 7.6 7.300 8.300 9.300 11.300 13.300 22.20908

26.400

Hydronic module Pump (one single centrifugal, 48.3 r/s) Monocell composite pump Expansion tank volume l Expansion tank pressure** kPa Water connections Victaulic (connection sleeves supplied) (with and without hydronic module) in 2 2-1/2 2-1/2 2-1/2 Diameter Outside tube diameter mm 60.3 60.3 60.3 60.3 60.3 60.3 60.3 76.1 76.1 76.1 * **
Monocell pump Threaded male gas connections 88.9 88.9

Nominal conditions: evaporator entering/leaving water temperature 12C/7C, outdoor air temperature 35C. When delivered, the pre-inflation of the tank keeps the plated membrane in the upper part of the tank. To permit changing the water volume, change the inflation pressure to a pressure that is close to the static head of the system (see below), fill the system with water (purging the air) to a pressure value that is 10 to 20 kPa higher than the pressure in the tank. Static head, m/Pressure, bar/Pressure, kPa 5 - 0,5 - 50 / 10 - 1 - 100 / 15 - 1,5 - 150 / 20 - 2 - 200 / 25 - 2,5 - 250

5 - ELECTRICAL DATA

30RA (without hydronic module) Power circuit Nominal power supply Voltage range Maximum unit power input* Nominal unit current draw** Maximum unit current draw at 360 V*** Maximum unit current draw at 400 V**** Maximum start-up current Standard unit With electronic starter control * V-ph-Hz V kW A A A A A 200 240
400-3-50 360-440 The control circuit is supplied via the unit-mounted transformer 20.3 27.9 36.9 33.6 158.4 99.0 24.6 34.7 45.6 41.4 151.0 101.0 30.1 41.1 54.9 49.7 168.9 113.0 35.2 47.0 62.7 56.9 176.1 120.0 39.9 54.3 72.4 65.6 190.4 128.0 44.1 62.7 82.6 75.1 199.8 - 49.6 69.1 91.9 83.4 208.1 - 60.5 82.3 109.8 99.5 218.6 - 70.6 94.1 125.4 113.9 233.0 - 79.6 108.6 144.8 131.3 256.1 - 104.2 140.2 185.4 168.6 293.4 - 124.9 168.7 222.9 202.8 327.6 -

Control circuit supply

Short-circuit stability and protection
See table on the next page
Power input of the compressor(s) + fan(s) at maximum unit operating conditions: entering/leaving water temperature = 15C/10C, maximum condensing temperature of 67.8C, and 400 V nominal voltage (values given on the unit name plate). ** Nominal unit current draw at nominal conditions: evaporator entering/leaving water temperature 12C/7C, outdoor air temperature 35C. The current values are given at 400 V nominal voltage. *** Maximum unit operating current at maximum unit power input and 360 V. **** Maximum unit operating current at maximum unit power input and 400 V (values given on the unit name plate). Maximum instantaneous starting current at 400 V nominal voltage and with compressor in across-the-line start (maximum operating current of the smallest compressors + fan current + locked rotor current of the largest compressor). Maximum instantaneous starting current at 400 V nominal voltage and with compressor with electronic starter (maximum operating current of the smallest compressor(s) + fan current + reduced start-up current of the largest compressor). Hydronic module Single pump Shaft power Power input* Maximum current draw at 400 V** kW kW A kW kW A 040 0.75 1.1 2.1 2.2 2.7 4.0.75 1.1 2.1 2.2 2.7 4.0.75 1.1 2.1 2.2 2.7 4.0.75 1.1 2.1 2.2 2.7 4.1.1 1.4 3.1 2.2 2.7 4.1.1 1.4 3.1 2.2 2.7 4.120 1.1 1.4 3.1 2.2 2.7 4.7 1.85 2.5 5.0 3.0 4.0 6.1.85 2.5 5.0 3.0 4.0 6.1.85 2.5 5.0 3.0 4.0 6.5.5 6.6 10.6 5.5 6.6 10.5.5 6.6 10.6 5.5 6.6 10.6

Maximum flow rate at an available pressure of 50 kPa (unit with hydronic module). Maximum flow rate at a pressure drop of 100 kPa in the plate heat exchanger (unit without hydronic module).
To achieve this volume, it may be necessary to add a storage tank to the circuit. This tank should be equipped with baffles to allow mixing of the fluid (water or brine). Please refer to the examples below.
6.7 - Pressure drop in the plate heat exchangers
1000 Pressure drop, kPa 4
10 Water flow rate, l/s 40
6.5.2 - Maximum water loop volume Units with hydronic module incorporate an expansion tank that limits the water loop volume. The table below gives the maximum loop volume for pure water or ethylene glycol with various concentrations.
Pure water EG 10% EG 20% EG 35% 30RA 040-080 (in litres) 30RA 090-160 (in litres) 30RA 200-240 (in litres) 1400 1000
Legend RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 30 RA 240

EG: Ethylene glycol

6.6 - Unit operating range at full and part load

Entering air temperature

45 44.5 44
Evaporator water leaving temperature Evaporator T = 5 K The evaporator and the hydronic circuit pump are frost protected down to -10C outside air temperature. Operating range with required anti-freeze solution and special Pro-Dialog control configuration
7 - ELECTRICAL CONNECTION 7.1 - Control box 30RA 040-080

95 347

589 X 552 499
Legend 1 Main disconnect switch PE Earth connection S Power supply cable section (see table Recommended wire sections). X Disconnect switch position referred to the unit side Y Control box position referred to the unit base 30RA 040 - 080 30RA 090 - 160 30RA 200 - 240 X (mm)Y (mm) 762 1107

X C 652

258 193
NOTES: The 30RA 040-240 units have only one power connection point located at the main disconnect switch. Before connecting electric power cables, it is imperative to check the correct order of the 3 phases (L1 - L2 - L3). Non-certified drawings. Refer to the certified drawings supplied with the unit or available on request.
7.2 - Power supply The power supply must conform to the specification on the chiller name plate. The supply voltage must be within the range specified in the electrical data table. For connections refer to the wiring diagrams. WARNING: Operation of the chiller with an improper supply voltage or excessive phase imbalance constitutes abuse which will invalidate the Carrier warranty. If the phase imbalance exceeds 2% for voltage, or 10% for current, contact your local electricity supply source at once and ensure that the chiller is not switched on until corrective measures have been taken.

Charging and removing heat exchange fluids should be done with devices that must be included on the water circuit by the installer. Never use the unit heat exchangers to add heat exchange fluid. 9.1 - Operating precautions and recommendations The water circuit should be designed to have the least number of elbows and horizontal pipe runs at different levels. Below the main points to be checked for the connection: Comply with the water inlet and outlet connections shown on the unit. Install manual or automatic air purge valves at all high points in the circuit. Use an expansion device to maintain pressure in the system and install a safety valve as well as an expansion tank. Units with a hydronic module include the safety valve and the expansion tank. Install thermometers in both the entering and leaving water connections. Install drain connections at all low points to allow the whole circuit to be drained. Install stop valves, close to the entering and leaving water connections. Use flexible connections to reduce vibration transmission. Insulate all pipework, after testing for leaks, both to reduce thermal leaks and to prevent condensation. If the external unit water pipes are in an area, where the ambient temperature is likely to fall below 0C, insulate the piping and add an electric heater. The internal unit piping is protected down to -20C. NOTE: For units not equipped with a hydronic module a screen filter must be installed as close to the heat exchanger as possible, in a position that is easily accessible for removal and cleaning. Units with hydronic module are equipped with this type of filter. The mesh size of the filter must be 1.2 mm. The plate heat exchanger can foul up quickly at the initial unit start-up, as it complements the filter function, and the unit operation will be impaired (reduced water flow rate due to increased pressure drop). Before the system start-up verify that the water circuits are connected to the appropriate heat exchangers (e.g. no reversal between evaporator and condenser). Do not introduce any significant static or dynamic pressure into the heat exchange circuit (with regard to the design operating pressures). The products that may be added for thermal insulation of the containers during the water piping connection procedure must be chemically neutral in relation to the materials and coatings to which they are applied. This is also the case for the products originally supplied by Carrier. 9.2 - Hydronic connections The diagram on page 20 shows a typical hydronic installation. When charging the water circuit use air vents to evacuate any residual air pockets.

Hydronic module

10 - NOMINAL SYSTEM WATER FLOW CONTROL The water circulation pumps of the 30RA units have been sized to allow the hydronic modules to cover all possible configurations based on the specific installation conditions, i.e. for various temperature differences between the entering and the leaving water (T) at full load, which can vary between 3 and 10C.
Entering water pressure reading
This required difference between the entering and leaving water temperature determines the nominal system flow rate. It is above all absolutely necessary to know the nominal system flow rate to allow its control via a manual valve provided in the water leaving piping of the module (item 9 in the typical hydronic circuit diagram). With the pressure loss generated by the control valve in the hydronic system, the valve is able to impose the system pressure/ flow curve on the pump pressure/flow curve, to obtain the desired operating point (see example for 30RA 100). The pressure drop reading in the plate heat exchanger is used to control and adjust the nominal system flow rate. The pressure drop is measured with the pressure gauge connected to the heat exchanger water inlet and outlet. Use this specification for the unit selection to know the system operating conditions and to deduce the nominal air flow as well as the plate heat exchanger pressure drop at the specified conditions. If this information is not available at the system startup, contact the technical service department responsible for the installation to get it.
Leaving water pressure reading

Air vent

These characteristics can be obtained from the technical literature using the unit performance tables for a T of 5 K at the evaporator or with the Electronic Catalogue selection program for all T conditions other than 5 K in the range of 3 to 10 K. 10.1 - Water flow control procedure As the total system pressure drop is not known exactly at the start-up, the water flow rate must be adjusted with the control valve provided to obtain the specific flow rate for this application. Proceed as follows: Open the valve fully (approximately 9 turns counter-clockwise). Start-up the pump using the forced start command (refer to the controls manual) and let the pump run for two consecutive hours to clean the hydronic circuit of the system (presence of solid contaminants). Read the plate heat exchanger pressure drop by taking the difference of the readings of the pressure gauge connected to the plate heat exchanger inlet and outlet, using valves (see diagrams below), and comparing this value after two hours of operation.

Legend O Open F Closed Water inlet Water outlet Pressure gauge
NOTE: Applies to units 040 to 160 If the pressure drop has increased, this indicates that the screen filter must be removed and cleaned, as the hydronic circuit contains solid particles. In this case close the shutoff valves at the water inlet and outlet and remove the screen filter after emptying the hydronic section of the unit. Renew, if necessary, to ensure that the filter is not contaminated. Purge the air from the circuit (see Air vent diagram).
When the circuit is cleaned, read the pressures at the pressure gauge (entering water pressure - leaving water pressure), expressed in bar and convert this value to kPa (multiply by 100) to find out the plate heat exchanger pressure drop. Compare the value obtained with the theoretical selection value. If the pressure drop measured is higher than the value specified this means that the flow rate in the plate heat exchanger (and thus in the system) is too high. The pump supplies an excessive flow rate based on the global pressure drop of the application. In this case close the control valve one turn and read the new pressure difference. Proceed by successively closing the control valve until you obtain the specific pressure drop that corresponds to the nominal flow rate at the required unit operating point. - If the system has an excessive pressure drop in relation to the available static pressure provided by the pump, the resulting water flow rate will de reduced and the difference between entering and leaving water temperature of the hydronic module will be increased. To reduce the pressure drops of the hydronic system, it is necessary: - to reduce the individual pressure drops as much as possible (bends, level changes, accessories, etc.) - to use a correctly sized piping diameter. - to avoid hydronic system extensions, wherever possible.
Pump curve and water flow control as a function of the system pressure drops Example: 30RA 100 at Eurovent conditions of 4.8 l/s
Pressure drop, kPa 6 Water flow rate, l/s Legend 1 Pump curve, 30RA Plate heat exchanger pressure drop (to be measured with the pressure gauge installed at the water inlet and outlet) 3 Installation pressure drop with control valve wide open 4 Installation pressure drop after valve control to obtain nominal flow rate 2
10.2 - Pump pressure/flow rate curves Single pumps
Pressure supplied, kPa Legend 1 30RA 040-30RA 080-30RA 120-30RA 200-240

Water flow rate, l/s

Dual pumps
Pressure supplied, kPa Legend 1 30RA 040-30RA 120-30RA 200-240
10.3 - Available static system pressure Single pumps
Available static pressure, kPa Available static pressure, kPa 22
Water flow rate, l/s Legend 1 30RA 30RA 30RA 30RA 30RA 30RA 30RA 30RA 30RA 30RA 30RA 30RA 240

12.2.4 - Undercharge If there is not enough refrigerant in the system, this is indicated by gas bubbles in the moisture sight glass. If the undercharge is significant, large bubbles appear in the moisture sight glass, and the suction pressure drops. The compressor suction superheat is also high. The machine must be recharged after the leak has been repaired. Find the leak and completely drain the system with a refrigerant recovery unit. Carry out the repair, leak test and then recharge the system. Important: After the leak has been repaired, the circuit must be tested, without exceeding the maximum low-side operating pressure shown on the unit name plate. The refrigerant must always be recharged in the liquid phase into the liquid line. The refrigerant cylinder must always contain at least 10% of its initial charge. For the refrigerant quantity per circuit, refer to the data on the unit name plate. 12.2.5 - Characteristics of R407C See the table below. Saturated bubble point temperatures (bubble point curve) Saturated dew point temperatures (dew point curve) 12.3 - Electrical maintenance When working on the unit comply with all safety precautions decribed in section Maintenance safety considerations. - It is strongly recommended to change the fuses in the units every 15000 operating hours or every 3 years. - It is recommended to verify that all electrical connections are tight: a. after the unit has been received at the moment of installation and before the first start-up, b. one month after the first start-up,when the electrical components have reached their nominal operating temperatures, c. then regularly once a year.

R407C characteristics

Bar Saturated bubbleSaturated dew BarSaturated bubbleSaturated dew (relative) point temp. C point temp. C (relative) point temp. C point temp. C 1 1.25 1.5 1.2.25 2.5 2.3.25 3.5 3.4.25 4.5 4.5.25 5.5 5.6.25 6.5 6.7.25 7.5 7.8.25 8.5 8.9.25 9.5 9.10.25 -28.55 -25.66 -23.01 -20.57 -18.28 -16.14 -14.12 -12.21 -10.4 -8.67 -7.01 -5.43 -3.9 -2.44 -1.02 0.34 1.66 2.94 4.19 5.4 6.57 7.71 8.83 9.92 10.98 12.02 13.03 14.02 14.99 15.94 16.88 17.79 18.69 19.57 20.43 21.28 22.12 22.94 -21.72 -18.88 -16.29 -13.88 -11.65 -9.55 -7.57 -5.7 -3.93 -2.23 -0.61 0.93 2.42 3.85 5.23 6.57 7.86 9.11 10.33 11.5 12.65 13.76 14.85 15.91 16.94 17.95 18.94 19.9 20.85 21.77 22.68 23.57 24.44 25.29 26.13 26.96 27.77 28.56 10.5 10.11.25 11.5 11.12.25 12.5 12.13.25 13.5 13.14.25 14.5 14.15.25 15.5 15.16.25 16.5 16.17.25 17.5 17.18.25 18.5 18.19.25 19.5 19.75 23.74 24.54 25.32 26.09 26.85 27.6 28.34 29.06 29.78 30.49 31.18 31.87 32.55 33.22 33.89 34.54 35.19 35.83 36.46 37.08 37.7 38.31 38.92 39.52 40.11 40.69 41.27 41.85 42.41 42.98 43.53 44.09 44.63 45.17 45.71 46.24 46.77 47.29 29.35 30.12 30.87 31.62 32.35 33.08 33.79 34.5 35.19 35.87 36.55 37.21 37.87 38.51 39.16 39.79 40.41 41.03 41.64 42.24 42.84 43.42 44.01 44.58 45.15 45.71 46.27 46.82 47.37 47.91 48.44 48.97 49.5 50.02 50.53 51.04 51.55 52.05 BarSaturated bubbleSaturated dew (relative) point temp. C point temp. C 20 20.25 20.5 20.21.25 21.5 21.22.25 22.5 22.23.25 23.5 23.24.25 24.5 24.25.25 25.5 25.26.25 26.5 26.27.25 27.5 27.28.25 28.5 28.29.25 47.81 48.32 48.83 49.34 49.84 50.34 50.83 51.32 51.8 52.28 52.76 53.24 53.71 54.17 54.64 55.1 55.55 56.01 56.46 56.9 57.35 57.79 58.23 58.66 59.09 59.52 59.95 60.37 60.79 61.21 61.63 62.04 62.45 62.86 63.27 63.67 64.07 64.47 52.55 53.04 53.53 54.01 54.49 54.96 55.43 55.9 56.36 56.82 57.28 57.73 58.18 58.62 59.07 59.5 59.94 60.37 60.8 61.22 61.65 62.07 62.48 62.9 63.31 63.71 64.12 64.52 64.92 65.31 65.71 66.1 66.49 66.87 67.26 67.64 68.02 68.39

13 - AQUASNAP MAINTENANCE PROGRAMME All maintenance operations must be carried out by technicians who have been trained on Carrier products, observing all Carrier quality and safety standards. Maintenance instructions During the unit operating life the service checks and tests must be carried out in accordance with applicable national regulations. If there are no similar criteria in local regulations, the information on checks during operation in annex C of standard EN 378-2 can be used. External visual checks: annex A and B of standard EN 378-2
13.2 - Description of the maintenance operations The equipment is supplied with polyolester oil (POE). Only use oil approved by Carrier. On request Carrier can carry out an oil analysis of your installation. Service A Full-load operating test Verify the following values: - compressor high-pressure side discharge pressure - compressor low-pressure side suction pressure - charge visible in the sight glass - temperature difference between the heat exchanger water entering and leaving temperature. Verify the alarm status
Corrosion checks: annex D of standard EN 378-2. These controls must be carried out: - After an intervention that is likely to affect the resistance or a change in use or change of high-pressure refrigerant, or after a shut down of more than two years. Components that do not comply, must be changed. Test pressures above the respective component design pressure must not be applied (annex B and D). - After repair or significant modifications or significant system or component extension (annex B) - After re-installation at another site (annexes A, B and D) - After repair following a refrigerant leak (annex D). The frequency of refrigerant leak detection can vary from once per year for systems with less than 1% leak rate per year to once a day for systems with a leak rate of 35% per year or more. The frequency is in proportion with the leak rate. NOTE: High leak rates are not acceptable. The necessary steps must be taken to eliminate any leak detected. NOTE 2: Fixed refrigerant detectors are not leak detectors, as they cannot locate the leak. 13.1 - Maintenance schedule Regular maintenance is indispensable to optimise the operating life and reliability of the equipment. Maintenance operations must be carried out in accordance with the schedules below: Service A B C D Frequency Weekly Monthly Annually Special cases

14 - start-up cHecklist for 30RA Liquid chillers (use for job file) Preliminary information Job name:...... Location:...... Installing contractor:...... Distributor:...... Start-up preformed by:... Date:.... Equipment Model 30RA:... S/N.... Compressors Circuit A 1. Model #.... . S/N.... 2. Model #.... . S/N.... Circuit B 1. Model #... S/N.... 2. Model #... S/N....
3. Model #.... 3. Model #... S/N.... S/N.... Air handling equipment Manufacturer...... Model #.... S/N.... . Additional air handling units and accessories........... Preliminary equipment check Is there any shipping damage?.. If so, where?......... Will this damage prevent unit start-up?..... Unit is level in its installation Power supply agrees with the unit name plate Electrical circuit wiring has been sized and installed properly Unit ground wire has been connected Electrical circuit protection has been sized and installed properly All terminals are tight All cables and thermistors have been inspected for crossed wires All plug assemblies are tight Check air handling systems All air handlers are operating All chilled water valves are open All fluid piping is connected properly All air has been vented from the system Chilled water pump is operating with the correct rotation. CWP amperage: Rated:. Actual.
Unit start-up Chilled water pump starter has been properly interlocked with the chiller Oil level is correct Unit has been leak checked (including fittings) Locate, repair, and report any refrigerant leaks.................. Check voltage imbalance: AB. AC. BC. Average voltage =.. (see installation instructions) Maximum deviation =.. (see installation instructions) Voltage imbalance =.. (see installation instructions). Voltage imbalance is less than 2% warning Do not start chiller if voltage imbalance is greater than 2%. Contact local power company for assistance. All incoming power voltage is within rated voltage range Check evaporator water loop Water loop volume =. (litres) Calculated volume =. (litres) 2.50 litres/nominal kW capacity for air conditioning (30RA 050 to 240) 3.50 litres/nominal kW capacity for air conditioning (30RA 040) Proper loop volume established Proper loop corrosion inhibitor included..litres of.. Proper loop freeze protection included (if required).litres of. Water piping includes electric tape heater up to the evaporator Return water piping is equipped with a screen filter with a mesh size of 1.2 mm Check pressure drop across the evaporator Entering evaporator =.. (kPa) Leaving evaporator =.. (kPa) Pressure drop (entering - leaving) =.. (kPa) WARNING Plot the pressure drop on the evaporator flow/pressure drop curve to determine the flow rate in l/s at the nominal operating conditions for the installation. If necessary use the control valve to impose the flow rate on the nominal value. Flow rate from the pressure drop curve, l/s =.. Nominal flow rate, l/s =.. The flow rate in l/s is higher than the minimum unit flow rate The flow rate in l/s corresponds to the specification of..(l/s)

Air-Cooled Liquid Chillers with Integrated Hydronic Module

AQUASNAP

Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products.

30RA 040-240 B

Nominal cooling capacity 39-245 kW
The new generation of Aquasnap liquid chillers features the latest technological innovations: Scroll compressors, lownoise fans made of a composite material, auto-adaptive microprocessor control, full optimisation for the ecological refrigerant HFC-407C. The Aquasnap includes a complete hydronic module as standard, simplifying the installation to straightforward operations like connection of the power supply and the chilled water supply and return piping. An auto-adaptive control algorithm ensures intelligent control of compressor operation in most comfort air conditioning applications, making a buffer tank unnecessary. Features I Integrated hydronic module eliminates the need for a fieldsupplied pump assembly and does not require additional space. The module incorporates all components necessary for the operation of the system: removable screen filter, water pump with high available pressure, expansion tank, water flow switch, safety valve, pressure gauges, and purge valve. A throttle valve allows adjustment of the water flow in accordance with the characteristics of the installation. All hydraulic components are protected against frost down to -20C.
Aquasnap is equipped with the revolutionary secondgeneration Flying Bird fan. This low-noise, two-speed fan is made of composite recyclable material and employs a multi-blade design and a rotating shroud, as used in the aeronautical industry. It is exceptionally quiet, and does not generate the low-frequency noise, irritating to the human ear. At part load or low outdoor temperatures the fan automatically switches to the low speed. As an option you can program fan operation at low speed, for example during the night, for quieter operation.
To reduce the operating noise even further, the fan is not fixed to the top unit panel, but supported by an extremely rigid tower chassis. This innovative structure prevents the transmission of vibrations to the unit casing and results in a more aesthetic flat top panel. I The scroll compressors run extremely quietly and vibrationfree. They are well-known for their durability and reliability. The motor is fully cooled by suction gas and permits up to 12 starts per hour. A safety valve allows reverse rotation due to incorrect wiring, without impairing compressor operation. In addition these compressors need no maintenance. The use of two compressors per circuit (except size 30RA 040) permits a reduction of the start-up current and of the power input at part load.
The ecological refrigerant HFC-407C has no effect on the ozone layer, and is the replacement for R-22 in air conditioning applications with small and medium capacities. It has been extensively tested by Carrier for several years and offers the same reliability and even slightly superior performances to those of R-22. I The evaporator is a welded, stainless steel plate heat exchanger, maximising the thermodynamic properties of HFC-407C and offering considerably increased performances as well as low water-side pressure drops. From size 30RA 090 upwards the units are equipped with a twin-circuit interlaced heat exchanger for safe operation at part load. When the unit is shut down, the heat exchanger is protected against freeze-up by a trace heater. I The refrigerant circuit is designed to be completely leakproof - for life. All pipes and the refrigeration components are welded, the capillaries, a source of leaks in the past, have been replaced. Pressure sensors, mounted directly on the pipes, take the place of the pressure switches. From size 30RA 090 upwards, two independent refrigerant circuits ensure partial cooling capacity in all circumstances. I The Aquasnap is designed for year-round operation and operates without the use of accessories down to -10C outdoor temperature. A control algorithm intelligently manages operation of the fans. I Electrical connections are simplified, and the standard Aquasnap equipment includes a main switch, and a single entry point of the three-phase without neutral power supply to the whole unit. I Large removable panels and the hinged door of the control box ensure perfect accessibility and permit easy access to all components. Furthermore an opening allows adjustments to be made without interrupting the operation of the chiller. For the most important maintenance operations the unit top cover is easily removed (with the fan remaining in place), and total access from above is possible. PRO-DIALOG Plus control PRO-DIALOG Plus is an advanced numeric control system that combines complex intelligence with great operating simplicity. PRO-DIALOG Plus constantly monitors all machine parameters and safety devices, and precisely manages the operation of compressors and fans for optimum energy efficiency. It also controls the operation of the water pump.

A powerful control system I The PID control algorithm with permanent compensation for the difference between entering and leaving water temperature and anticipation of load variations regulates compressor operation for intelligent leaving water temperature control. I To optimise power consumption, PRO-DIALOG Plus automatically resets the chilled water temperature set-point in accordance with the outdoor air temperature or the return water temperature or uses a second set-point (example occupied/unoccupied). I PRO-DIALOG Plus control is auto-adaptive for full compressor protection. The system permanently optimises compressor run times according to the application characteristics (water loop inertia), preventing excessive cycling. In most comfort air conditioning applications this feature makes a buffer tank unnecessary. Clear and easy-to-use control system I The operator interface is clear and user-friendly: LEDs and two numeric displays ensure immediate verification of all unit operating data. I A simple push of a button, conveniently positioned on a synoptic chiller diagram gives you immediate display of the usual parameters: temperatures, pressures, set-point, compressor run times etc. I 10 menus offer direct access to all machine controls, including a history of possible faults, for rapid and complete chiller fault diagnosis. Extended communications capabilities I PRO-DIALOG Plus allows remote control and monitoring of the chiller through a wired connection: start/stop, cooling/heating mode selection, power demand limit or dual set-point and customer safety lock. The system permits remote signalling of any possible anomaly for each refrigerant circuit. I The internal clock permits programming of: - chiller start/stop - operation at the second set-point (e.g. unoccupied room) - operation of the chiller with the fan at low speed to reduce the noise level. I Master/slave control of two chillers operating in parallel with operating time equalisation. I RS 485 serial port for remote chiller control via communications bus.
PRO-DIALOG Plus operator interface

Options and accessories

Option Condenser anti-corrosion pre-treatment for marine applications Condenser post-assembly corrosion treatment for rural, urban and industrial applications Electronic compressor starter for reduction of start-up current (30RA 040-080) Operation down to -20C outside temperature Low-temperature unit for glycol leaving temperatures from 0C to -10C Unit without hydronic module Hydronic module with dual pump Communications board with open JBus protocol X X X X X X X X X Accessory

Sound levels

040 Sound power, dB(A) 10-12 W 92
According to Eurovent 8/1 (derived from ISO standard 3744 or ISO 9614-1).
Hydronic module (040 to 160)
Legend Components of unit and hydronic module 1 Victaulic screen filter 2 Expansion tank 3 Safety valve 4 Available pressure pump 5 Purge valve and pressure tap (see Installation Manual) 6 Pressure gauge to measure the plate heat exchanger pressure drop (to be isolated with valve No. 5 if not used) 7 System air vent 8 Flow switch 9 Flow control valve 10 Plate heat exchanger 11 Evaporator defrost heater Installation components 12 Air vent 13 Thermometer sleeve 14 Flexible connection 15 Check valve 16 System water drain plug (on connection pipe supplied in the unit) 17 Pressure gauge 18 Freeze-up protection bypass valve (when valves No. 15 are closed during winter) 19 Charge valve 20 Plate heat exchanger outlet 21 Plate heat exchanger inlet 22 Water inlet 23 Water outlet 24 Customer connection sleeves for welded or screw connection (supplied) --- Hydronic module (units with hydronic module) Note: Units without hydronic module (option) are equipped with a flow switch and an internal piping heater.
Typical hydronic circuit diagram

Physical data

30RA Nominal cooling capacity* Operating weight with hydronic module Single pump Dual pump Operating weight without hydronic module Refrigerant charge Circuit A Circuit B Compressors Quantity, circuit A Quantity, circuit B No. of capacity steps Minimum capacity Control type Condensers Fans Quantity Total air flow (high speed) Speed (high/low speed) Evaporator Water volume Max. water-side operating pressure Option without hydronic module Unit with hydronic module Hydronic module Pump (single centrifugal, 48.3 r/s) Quantity Expansion tank volume Expension tank pressure Water connections (with and without hydronic module) Diameter Outside tube diameter 040 kW 39.4 kg 502 kg 12.1174 12.5 12.6 16.49.57.67.79.89.97.115.135.157.202.245.0

R-407C -

Hermetic scroll compressor, 48.3 r/s 50 PRO-DIALOG Plus

l/s r/s

Grooved copper tubes, aluminium fins Axial Flying Bird fans with rotating shroud 11.5/5.8 11.5/5.8 11.5/5.8 15.6/7.8 15.6/7.8 11.5/5.8 11.5/5.8 11.5/5.8 15.6/7.8 15.6/7.8 11.5/5.8 15.6/7.8 8.300 9.300 11.300 13.300 22.400 26.400
Direct-expansion welded plate heat exchanger l 3.6 4.6 5.9 6.5 7.6 7.2 kPa Monocell composite pump l kPa 100 100
Monocell pump Threaded male gas connections 88.9 88.9
Victaulic (connection sleeves supplied) in 2 mm 60.3 60.3 60.3 60.3 60.3

2 60.3

2-1/2 76.1
* Nominal conditions: evaporator entering/leaving water temperature 12C/7C, outdoor air temperature 35C.

Electrical data

30RA (without hydronic module) Power circuit Nominal power supply Voltage range Control circuit supply Maximum unit power input* Nominal unit current draw** Maximum unit current draw at 360 V*** Maximum unit current draw at 400 V**** Maximum start-up current Standard unit With electronic starter control Holding current for three-phase short circuits V-ph-Hz V kW A A A A A kA 400-3-50 360-440 The control circuit is supplied via the unit-mounted transformer 20.3 24.6 30.1 35.2 39.9 44.1 49.6 60.5 27.9 34.7 41.1 47.0 54.3 62.7 69.1 82.3 36.9 45.6 54.9 62.7 72.4 82.6 91.9 109.8 33.6 41.4 49.7 56.9 65.6 75.1 83.4 99.5 158.4 99.151.0 101.168.9 113.176.1 120.190.4 128.199.208.218.70.6 94.1 125.4 113.9 233.79.6 108.6 144.8 131.3 256.104.2 140.2 185.4 168.6 293.124.9 168.7 222.9 202.8 327.6 19
* Power input of the compressor(s) + fan(s) at maximum unit operating conditions: entering/leaving water temperature = 15C/10C, maximum condensing temperature of 67.8C and 400 V nominal voltage (values given on the unit name plate). ** Nominal unit current draw at the following conditions: evaporator entering/leaving water temperature 12C/7C, outdoor air temperature 35C. The current values are given at 400 V nominal voltage (values given on the unit name plate). *** Maximum unit operating current at maximum unit power input and 360 V. **** Maximum unit operating current at maximum unit power input and 400 V (values given on the unit name plate). Maximum instantaneous starting current at 400 V nominal voltage and with compressor in across-the-line start (maximum operating current of the smallest compressors + fan current + locked rotor current of the largest compressor). Maximum instantaneous starting current at 400 V nominal voltage and with compressor with electronic starter (maximum operating current of the smallest compressor(s) + fan current + reduced start-up current of the largest compressor).

Hydronic module Single pump Shaft power Power input* Maximum current draw at 400 V** Dual pump Shaft power Power input* Maximum current draw at 400 V** kW kW A kW kW A
040 0.75 1.1 2.1 2.2 2.7 4.7
050 0.75 1.1 2.1 2.2 2.7 4.7
060 0.75 1.1 2.1 2.2 2.7 4.7
070 0.75 1.1 2.1 2.2 2.7 4.7
080 1.1 1.4 3.1 2.2 2.7 4.7
090 1.1 1.4 3.1 2.2 2.7 4.7
100 1.1 1.4 3.1 2.2 2.7 4.7

120 1.85 2.6.6

140 1.85 2.6.6

160 1.85 2.6.6

200 5.5 6.6 10.9 5.5 6.6 10.9
240 5.5 6.6 10.9 5.5 6.6 10.9
Note: The water pump power input values are given for guidance only. * To obtain the maximum power input for a unit with hydronic module add the maximum unit power input from the top table to the pump power input (*) from the table above. ** To obtain the maximum unit operating current draw for a unit with hydronic module add the maximum unit current draw from the top table to the pump current draw from the table above.

Electrical data notes:

30RA 040-240 units have a single power connection point located at the main switch. The control box includes the following standard features: - a main disconnect switch, starter and motor protection devices for each compressor, the fan, the optional pumps - the control devices Field connections: All connections to the system and the electrical installations must be in full accordance with all applicable local codes. The Carrier 30RA units are designed and built to ensure conformance with these codes. The recommendations of European standard EN 60204-1 (machine safety - electrical machine components - part 1: general regulations - corresponds to IEC 60204-1) are specifically taken into account, when designing the electrical equipment. Notes: Generally the recommendations of IEC 60364 are accepted as compliance with the requirements of the installation directives. Conformance with EN 60204-1 is the best means of ensuring compliance with the Machines Directive 1.5.1. Annex B of EN 60204-1 describes the electrical characteristics used for the operation of the machines. 1. The operating environment for the 30RA units is specified below: Environment* - Environment as classified in EN 60721 (corresponds to IEC 60721): - outdoor installation* - ambient temperature range: -10C to +45C 1K, class 4K3* - altitude: 2000 m - presence of hard solids, class 4S2 (no significant dust present) - presence of corrosive and polluting substances, class 4C2 (negligible) - vibration and shock, class 4M2 Competence of personnel, class BA4* (trained personnel - IEC 60364) 2. Power supply frequency variation: 2 Hz. 3. The neutral (N) conductor must not be connected directly to the unit (if necessary use transformers) 4. Over-current protection of the power supply conductors is not provided with the unit. 5. The factory-installed disconnect switches/circuit breakers are of a type that is suitable to interrupt the power in accordance with EN60947-3 (corresponds to IEC 60947-3). 6. The units are designed for connection to TN networks (IEC 60364). For IT networks the earth connection must not be at the network earth. Provide a local earth, consult competent local organisations to complete the electrical installation. NOTE: If particular aspects of an actual installation do not conform to the conditions described above, or if there are other conditions which should be considered, always contact your local Carrier representative. * The required protection level for this class is IP43BW (according to reference document IEC 60529). All 30RA units are protected to IP44CW and fulfil this protection condition.

Operating limits

Evaporator water flow rate, l/s 30RA Min. water flow Max. water flow* Single pump Dual pump 1.1 1.1 1.4 1.5 1.7 2.3.6 4.2 4.8 5.6 6.8 3.4.4 4.6 5.5 5.6 5.8 8.5 8.8 9.1 15.3 23.4 4.4 5.6.4 6.8 6.9 7.4 10.5 11.4 11.9 15.3 23.4 Max. water flow** 30RA 3.7 4.6 5.8 6.4 7.3 7.6 8.8 10.8 12.7 14.4 19.1 24.- 240 Entering water temperature at start-up, C Minimum , C 7.8 Maximum C 30 Entering water temperature at shut-down, C Maximum C 55 Entering air temperature, C Minimum C -10 Maximum C 46
Leaving water temperature during operation, C 30RA 040 - 240

Minimum , C 5

Maximum C 15
Notes: Maximum flow rate for an available pressure of 50 kPa (unit with hydronic module) Maximum flow rate for a pressure drop of 100 kPa (unit without hydronic module) For applications requiring operation below 7.8C contact Carrier. For applications requiring operation below 5C anti-freeze must be used.

Operating range

Entering air temperature
Notes: 1. Evaporator t = 5 K 2. The evaporator and the hydronic circuit pump are protected against frost down to -20C. Operating range with required anti-freeze solution and special Pro-Dialog control configuration
Evaporator leaving water temperature
Available static system pressure

Single pump

325 300

Dual pump

Available static pressure, kPa

Water flow rate, l/s

Legend 1 30RA 30RA 30RA 30RA 30RA 080-30RA 100
30RA 120 30RA 140 30RA 160 30RA 200 30RA 240
Legend 1 30RA 30RA 30RA 30RA 30RA 30RA 090
30RA 100 30RA 120 30RA 140 30RA 160 30RA 200 30RA 240

Water loop volume

Minimum water loop volume Volume = CAP (kW) x N* = litres, where CAP is the nominal cooling capacity at nominal operating conditions. Air conditioning application 30RA 040 30RA 050 to 240 N* 3.5 2.5
Pure water 10% ethylene glycol 30 RA 040-RA 090-RA 200-240 (in litres) (in litres) (in litres)
Maximum water loop volume Units with hydronic module incorporate an expansion tank that limits the water loop volume. The table below gives the maximum loop volume for pure water or ethylene glycol with various concentrations.

400 300

1000 800

1400 1000

Industrial process cooling 30RA 040 to 240 See note
20% ethylene glycol 35% ethylene glycol
NOTE: For industrial process cooling applications, where high stability of the water temperature levels must be achieved, the values above must be increased.

Dimensions/clearances

30RA 040-080

1000 1000

Legend: All dimensions are given in mm. Required clearances for air entry Required clearances for maintenance Water inlet Water outlet

Power supply inlet

1000 2
Air outlet, do not obstruct
NOTE: Drawings are not contractually binding. Before designing an installation, consult the certified dimensional drawings, available on request.

43.225 273
11.7 14.6 17.8 20.9 24.3 25.6 29.3 35.5 41.4 48.70
12.9 15.23.4 26.31.7 37.9 46.66 80
2.09 2.61 3.08 3.55 4.19 4.75 5.2 6.16 7.16 8.38 10.8 13.1

171 215

Legend: LWT CAP kW COMP kW UNIT kW COOL l/s COOL kPa PRES kPa (1) PRES kPa (2)
Leaving water temperature Net cooling capacity Compressor power input Unit power input (compressors, fans, control circuit) Evaporator water flow rate Evaporator pressure drop Available pressure at the unit outlet (unit with single-pump hydronic module) Available pressure at the unit outlet (unit with dual-pump hydronic module)
Full load correction factors for Eurovent laboratory test: Net cooling capacity 1.000 Energy efficiency ratio 1.000 Evaporator pressure drop 1.000 Application data: Standard units Refrigerant: R-407C Evaporator temperature rise: 5 K Evaporator fluid: chilled water Fouling factor: 0.44 x 10-4 (m2 K)/W Performances in accordance with EN 12055.
C kW 42.38.5 47.131 17.26.3 30.4 38.4 43.60 18.7 23.2 27.5 32.9 40.8 45.65 1.84 2.27 2.65 3.1 4.16 4.52 5.3 6.9.112 11.45.235 285
240 13.3 16.7 20.2 23.7 27.7 29.2 33.4 40.5 46.14.5 17.9 21.4 26.2 30.2 31.6 35.8 42.90 2.17 2.7 3.18 3.67 4.31 4.92 5.38 6.36 7.41 8.61 11.2 13.269 14.6 18.3 22.1 25.8 30.2 32.1 36.5 44.87 15.8 19.5 23.3 28.3 32.7 34.5 38.9 46.97 2.06 2.3.48 4.08 4.66 5.7.03 8.15 10.6 12.217 40.16 20.1 24.33 35.1 39.9 48.94 17.2 21.3 25.3 30.5 35.5 37.5 42.1.95 2.41 2.82 3.29 3.85 4.41 4.8 5.65 6.65 7.12.226

45.233 282

11.8 14.21.2 24.6 25.9 29.42 49.71
19.2 23.7 27.1 28.3 32.1 38.81
2.15 2.69 3.17 3.65 4.31 4.9 5.36 6.34 7.37 8.61 11.1 13.5

163 210

13 16.3 19.7 23.28.5 32.5 39.5 45.65 78
14.2 17.5 20.9 25.6 29.5 30.9 34.9 41.88
2.05 2.3.47 4.09 4.65 5.7 8.17 10.5 12.8

176 218

40.209 253
14.3 17.9 21.6 25.1 29.5 31.3 35.6 43.2 49.71 84
15.5 19.1 22.8 27.33.45.95
1.94 2.41 2.83 3.28 3.87 4.4 4.8 5.66 6.63 7.73 9.97 12.1

188 226

38.4 47.239
15.6 19.7 23.6 27.4 32.2 34.47.92
16.8 20.9 24.8 29.9 34.7 36.8 41.4 49.102
1.84 2.27 2.66 3.1 3.65 4.16 4.52 5.32 6.27 7.29 9.4 11.4

200 233

36.3 44.225
17.1 21.5 25.7 29.7 35.1 37.6 42.84 100
18.3 22.7 26.9 32.2 37.44.91 110
1.73 2.14 2.49 2.92 3.43 3.91 4.25 4.99 5.91 6.85 8.83 10.7

211 240

47.240
12.1 15.1 18.5 21.8 25.3 26.5 30.43.61 74
13.3 16.3 19.7 24.3 27.8 28.9 32.8 39.4 48.69 84
2.28 2.84 3.36 3.86 4.53 5.18 5.67 6.72 7.8 9.07 11.8 14.3

147 200

Cooling capacities, single and dual pumps (cont.)
Legend: LWT CAP kW COMP kW UNIT kW COOL l/s COOL kPa PRES kPa(1) PRES kPa(2)
Leaving water temperature Net cooling capacity Compressor power input Unit power input (compressors, fans and control circuit) Evaporator water flow rate Evaporator pressure drop Available pressure at the unit outlet (unit with single-pump hydronic module) Available pressure at the unit outlet (unit with dual-pump hydronic module)

Guide specifications

Air-cooled liquid chillers Nominal cooling capacity 39 to 245 kW Carrier model: 30RA Part 1 - General System description
Air-cooled liquid chiller for outdoor installation, equipped with scroll compressors, low-noise fans, autoadaptive microprocessor control and operating with HFC-407C refrigerant which has no effect on the ozone layer.

Quality assurance

30RA units comply with requirements of European directives: - machinery directive 98/37/EC, modified, - low voltage directive 73/23/EEC, modified. - electromagnetic compatibility directive 89/336/EEC, modified and with the applicable recommendations of European standards: - machine safety, electrical equipment in machines, general regulations: EN 60204-1, - radiated electromagnetic emissions: EN 50081-1, - conducted electromagnetic emissions: EN 50081-2, - electromagnetic immunity EN 50082-2. 30RA units have been designed and tested in a facility with a quality assurance system certified ISO 9001. 30RA units have been assembled in a facility with an environment management system certified ISO 14001. The published performances have been certified by Eurovent and verified by independent laboratories. All units undergo a run test before shipment.
Air heat exchanger/fan I One (30RA 040-080) or two (30RA 090-240) vertical coils with slotted aluminium fins expanded into grooved copper tubes. Coil protection grille made of steel wire, coated in polyethylene. I Low-noise axial Carrier Flying Bird fan with 11 blades and a rotating shroud, made of a composite material. Threephase, two-speed motor (11.5/5.8 r/s or 15.6/7.8 r/s), insulation class F, protection category IP 55, overload protection by thermal relay. Vertical air flow with protection grille made of steel wire, coated in polyethylene. Refrigerant circuit I Each circuit includes: liquid line valve, moisture sight glass, thermostatic expansion device, pressure and temperature sensors, safety valve, manually reset high pressure switch, and a refrigerant charge of HFC-407C. All components of the refrigerant circuit are welded for total and lasting leak-tightness. Control and power circuit control box I The control box is accessible via a hinged door. It includes a main disconnect switch, fuses and circuit breakers, compressor, fan and water pump contactors, thermal relays, low-voltage control circuit transformer (24 V control circuit) and the Pro-Dialog control system. The whole unit is supplied by a single power connection point (three-phase supply without neutral). Chassis/cabinet I Chassis and cabinet made of galvanised sheet steel. Painted in oven-baked polyester powder paint in light grey colour (RAL 7035). Removable panels with 1/4 turn locks. Hydronic module I Hydronic module, integrated into the chiller, including: removable screen filter, expansion tank, single monocell centrifugal water pump (dual water pump optional) - threephase motor with internal thermal protection, water flow switch, safety valve, set to 3 bar, flow control valve, pressure gauge and purges. Internal piping made of galvanised steel. Customer-side Victaulic connections with welding or screw connection sleeves. Protection against ice build-up down to -20C by thermal insulation and water pump cycling. Note: Units without hydronic module (option): internal water piping protected against frost down to -10C by electric resistance heater.

Part 2 - Products Equipment
Compressor Hermetic scroll compressor with only three moving parts, 2-pole electric motor, cooled by suction gas with overload protection through an internal thermostat and/or thermal relay. Oil level sight glass and polyolester synthetic oil charge.
Water heat exchanger Stainless steel plate heat exchanger with welded copper connections; from size 30RA 090 upwards the water heat exchanger has two interlaced independent refrigerant circuits. I Closed-cell thermal foam insulation. Anti-freeze protection during operation by flow switch (standard on all versions) and during shutdown down to -20C by electric resistance heater.
Carrier Pro-Dialog Plus control system Pro-Dialog Plus ensures the following functions: Control I Entering or leaving water temperature control by PID loop with compressor run time equalising. The system permanently adjusts the system inertia and ensures complete prevention of excessive compressor cycling. The chiller can safely operate with a low system water volume which often makes the use of a buffer tank unnecessary (see minimum water volume in this document). I Head pressure control by auto-adaptive algorithm (fan speed). I Water pump control (optional dual pump with automatic change-over). I Control at the second set point (example: unoccupied room). Set point reset as a function of the air temperature or the difference between entering/leaving water temperature. Safety I The system checks the evolution of the parameters (temperatures, pressures etc.), and responds to maintain the compressor within the operating range. If despite this one parameter exceeds its limit, an alert message is generated or the unit is shut down. The following faults cause the refrigerant circuit or the unit to be shut down: - Low suction pressure - High discharge pressure - Low suction temperature - Compressor, water pump overload - Reverse compressor rotation - Temperature sensor and pressure transducer fault - Board and loss of communication fault - Customer safety device tripping - Heat exchanger anti-freeze protection - More than 50 alert or fault codes to facilitate fault detection
Operator interface I Includes status or fault LEDs, two numerical displays, a refrigerant system synoptic diagram and a command keyboard. I Immediate display of parameters: entering/leaving water and ambient air temperatures, set point, operating temperatures and number of compressor start-ups. I Diagnosis and complete parameter set by selection of one of the following menus: information, temperatures, pressures, set points, input values, test, configuration, alarms, alarm history and operating log. Remote management of the chiller I Volt-free contact inputs permit: - Start/stop control - Selection of cooling or heating mode (boiler start-up) - Integration of a customer safety device - Operation at the second set point* (example room unoccupied) - Maximum demand limit* (three limit levels from size 30RA 090 onwards) * One or the other for 30RA 040-080 I Outputs are available for: - Start-up of a boiler (shutdown of the chiller) - Signalling of a fault condition for each circuit. I The internal clock permits programming of the following operations: - chiller start/stop - control at the second set point (e.g. unoccupied room) - fan at low speed to reduce the noise level (e.g. during the night) I Master/slave control of two chillers operating in parallel with operating time equalisation. I RS 485 serial port for remote chiller control via communications bus.

Order No. 13420-20, 09.2003. Supersedes order No. 13420-20, 11.2001. Manufacturer reserves the right to change any product specifications without notice. The cover photo is solely for illustration purposes, and is not contractually binding.
Manufactured by Carrier SA, Montluel, France. Printed on Totally Chlorine Free Paper. Printed in the Netherlands.