Air Cooled Chillers – APS

with Screw Compressors

The APS range of air cooled chillers has screw compressors, microchannel coils and is available with either the low GWP refrigerants, R513a, R1234ze or the older refrigerant R134a.

Depending on the refrigerant used, the available capacities for the APS chillers are between 160kW and 1,800kW.

APS Air Cooled Chiller – Overview

The APS range of Air Cooled Chillers is available in two configurations, each with selectable options, so that you can decide what is most important for every installation.

The Basic and Better Code configurations, and the selectable options, are shown below:

To ensure the highest level of quality and reliability in our Chillers, all manufacturing and testing procedures are carried out according to ISO 9001:2015 Quality Management system and ISO 14001:2015 Environmental Management system.

  • Suction lines are insulated with closed cell foam insulation, then wrapped with a special protective material and then finally epoxy coated.  This gives further protection for the insulation against weather and other factors
  • Other exposed copper pipes and headers are epoxy coated, after being cleaned, to maintain pipe material and brazing protected against external conditions
Option No.
Opt 1
Opt 2
Opt 3
Opt 4
Opt 5
Opt 6
Opt 7
Opt 8
Opt 9
Opt 10
Opt 11
Opt 12
Opt 13
Opt 14
Opt 15
Opt 16
Opt 17
Opt 18
Opt 19
Opt 20
Opt 21
Opt 22
Opt 23
Opt 24
Opt 25
Opt 26
Opt 27
Opt 28
Opt 29
Opt 30
Opt 31
Opt 32
Opt 33
Opt 34
Opt 35
Opt 36
Opt 37
Opt 38
Opt 39
Opt 40
Opt 41
Opt 42
Opt 43
Opt 44
Opt 45
Opt 46
Opt 47
Opt 48
General
IP23 enclosure for indoor units
IP54 enclosure for all outdoor units
Higher IP classes for enclosures
Operating limit between 0°C and +40°C
Operating limit down to -15°C
Operating limit lower than -15°C
Nominal noise levels
Low noise axial fans (running at 700 rpm max)
Reduced noise level (compressor jacket)
Further reduced noise level (single skin compressor compartment)
Further reduced noise level (double skin compressor compartment)
C-channel base (welded, spray painted)
Cross beams made of tubular steel
Units electrostatically powder coated
Protective grille for lower compressor compartment
Vibration dampers (loose item)
CE/UKCA Mark incl. all conformities to specific regulations, labelling/documentation etc
Electrical
400/3/50 operating voltage, single point supply
400 V, no neutral
Non-fused electrical main switch
Fused electrical main switch
Simple cabling (without trunking)
Electrical wiring with cable ducts (trunking)
Controls comprise short cycling time protection
Motor thermal protection
Switch panel for power
Switch panel for controls
Circuit breaker for short circuit protection
Circuit breaker for mains power
Dual point power connections
Earth leakage relay
Power factor correction for units
Measurement devices for electrical current and voltage
Energy meter (for control of power consumption)
Socket with 230 V supply
Socket with 230 V supply with transformer
Bulk head light for switch cabinet
Controls
Microprocessor based controller (simple version)
Microprocessor based controller (programmable)
BMS communication gateway (BacNet, ModBus etc.)
Temperature sensors for cold water in/out
Frost protection (Evaporator leaving water temperature )
Touch screen controller
Remote control of chiller
Control of remote cold water pump (volt-free contact)
Compressors
Screw compressors
VFD for one compressor on a unit (if not provided to comply with ED)
Circuit breaker per compressor
Starting contactors per compressor
Phase failure relay (overload protection, low voltage)
Rubber vibration isolators
External overload relays for compressors
Compressor soft start
Refrigeration Circuit
Liquid line solenoid valve (compressor controlled)
Shut off valves (suction, discharge)
Moisture indicator with sight glass
Electronic expansion valve [or thermostat where applicable]
High pressure switch
Low pressure switch
Pressure transducer (high and low side) for refrigerant circuit
Full refrigerant charge - R513a (GWP 573)
Full refrigerant charge - R1234ze (GWP 6)
Full refrigerant charge - R134a (GWP 1430)
Refrigerant Piping
Single pressure relief valve
Dual pressure relief valves
Pressure gauges for high / low side
Filter drier (replaceable core)
Gas warning device (leakage detection)
Leak detection for selected refrigerants i.a.w. EN378 (e.g. R290)
Evaporator
Shell and tube
Brazed plate heat exchanger
Insulation 19 mm
Evaporator cladding - aluminium
Evaporator cladding - painted galvanized steel
Evaporator cladding - stainless steel
Trace heating for evaporator
Pressure differential switch (evaporator)
Water flow switch evaporator (loose item)
Water flow switch evaporator (fitted)
Condenser / Fans
Axial fans
VFD for fans
EC fans
External overload relays for fans
Microchannel condenser coils
Corrosion protection micro-channel coils (pre-coated)
Condenser coils made of Cu/Al
Condenser coils made of Cu/Cu
Corrosion protection Cu/Al or Cu/Cu (post coating)
Circuit breakers for fans
Protected condenser coils for uniform air flow
Fan control by on/off
Thermal protection of fan motors
Integrated free-cooling package (including valves, controls and sensors)
Separate free-cooling package (including valves, controls and sensors)
Hydraulics
Piping connections with Victaulic quick lock
Piping connections with DIN flanges
Standard positions for piping connections
Customer specific positions for piping connections
Integrated water buffer tank
Integrated cold water pump(s)
Basic Code Standard
Basic Code Options
Better Code Standard
Better Code Options

Unit Construction

  • Welded structural C-channel base painted with mono-component catalysed primer sprayed paint
  • Base is equipped with welded brackets for heavy duty lifting lugs
  • Easily accesible system components
  • Structural members are made from 15 gauge (1.8mm) tubular cross members that are semi welded with stainless steel fasteners.  All members and panels (side and roof) are painted with oven baked polyester electrostatic powder paint
  • Petra paint is certified up to 5000 hours salt spray (fog) test as per ASTM 117 A&B
  • Condenser coils are covered with protective panels to ensure uniform air distribution across the coil face area and provide additional protection for the coil from weather elements
  • A coil guard is placed on the lower part of the unit, all around the perimeter, to provide protection for the unit components
  • It is fabricated from gauge 18 (1.25mm) galvanised steel sheet metal and painted with Petra powder paint
  • The coil guard is fitted in place by spring loaded quick turn latch, and is supported by stainless steel hinges

Compressors

  • Suction gas-cooled semi hermetic twin screw compressor(s)
  • Variable slide valves allow the chillers to match actual load conditions, delivering excellent part load performance
  • IP 54 enclosure class of terminal box
  • Double walled pressure compensated rotor housing which is extremely stable and results in additional sound attenuation
  • Proven long-life bearings with pressure unloading
  • Optimised oil management with built-in directly flanged on oil separator
  • Pressure relief bearing chamber ensures minimum refrigerant dilution in the oil
  • Large volume motor suitable for part winding or Star-Delta starting, with integrated embedded sensors in each winding
  • Intelligent electronics, including thermal motor temperature monitoring, phase sequence monitoring, manual reset lock-out and discharge temperature
  • Compressor starts unloading
  • Rubber-in-shear (RIS) vibration isolation
  • Oil level switch, high efficiency suction strainer, crank case heater
  • Compressor is equipped with built-in low pressure protection by a pressure transmitter connected to the unit controller
Screw Compressor

Semi Hermetic Twin Screw Compressor

Condenser Coils

 

  • Petra’s air cooled condenser coils are designed to deliver their duties with optimum performance at all design conditions.
  • The APS coils are highly efficient Microchannel type (MCHE)
  • Compact design aluminium Microchannel coils have reduced refrigerant charge and reduce the unit weight
  • High degree of corrosion resistance
  • All Microchannel coils are pressure tested by dry air up to 2,900 kPA under water
  • They also undergo dry cleaning after manufacturing for optimum system cleanliness
  • NB: APS 50-1 has copper/aluminium coils as standard, all other models are equipped with Microchannel coils as standard
    • NB: APS 50-1 has copper/aluminium coils as standard, all other models are equipped with Microchannel coils as standard
    • Copper/Aluminium coils are available as an alternative to the standard Microchannel coils
    • Petra manufactured V-shaped air cooled condenser coils are designed to deliver the duty with maximum performance for all design conditions
    • Coils are manufactured from seamless copper tubes mechanically expanded into aluminium fins
    • Type L heavy wall, seamless copper tubes are provided for the coil headers
    • The condenser coils are hydrostatic pressure tested in accordance with the UL 1995-2000 standard
    • All coils are pressure tested by dry air up to 3,100kPa under water
    • Coils undergo dry cleanse after manufacturing for maximum system cleanliness
    • Copper/copper condenser coils may also be available, please call us for more information
  • Petra manufactured Cu/Cu condenser coils are available as an optional upgrade to the standard APS chiller specification
  • Coils are manufactured from seamless copper tubes mechanically expanded into copper fins
  • Coil headers are fabricated from Type L heavy wall seamless copper tubes
  • The condenser coils are hydrostatic pressure tested in accordance with UL 1995-2000 standard
  • All coils are air pressure tested by dry air up to 3,100 kPA under water
  • They also undergo dry cleaning after manufacturing for optimum system cleanliness
  • Cu/Cu coils have approxiately twice the conductivity of Cu/Al coils and are therefore more efficient.  However, they are also more expensive and suitable for installation in corrosion-free environments

Polyurethane pre-coating (for aluminium fins)

  • A water based organic type pre-coated fin designed to give better retained performances compared to typical organic type
  • The topcoat is made of hydrophilic resin of polyvinyl alchohol mix with hydrophilic lubricants
  • It provides a better level of retained as well as improvement in the area of surface friction to help lengthen the life span of a punch dies
  • Paint is certified as  per ASTM 117 A&B up to 3,000 hours salt fog test

Polyurethane post-coating (for aluminium and copper fins)

  • Aliphatic Acrylic Polyurethane type, with high gloss finish with exceptional weathering performance characteristics
  • Used extensively in virtually all industrial markets, 134 VOC provides a smooth, durable finish that has superior resistance to corrosion, abrasion and chemical exposure
  • Paint is certified as per ASTM 117 A&B up to 3,000 hours salt fog test

Condenser Fans and Motors

  • Condenser fans are of the external rotor type
  • External rotor motor is a space saving, compact design that also offers full speed controllability and low starting currents
  • Seated-for-life ball bearings fitted throughout the range with an L10 life expectancy 0f approximately 40,000 hours depending on conditions of operation
  • The minimum enclosure standard is IP 54 in accordance with DIN40050
  • The thermal class is 155 according to DIN EN 600034-1, IEC 62114 with class F insulation
  • Thermal contacts are fitted with external rotor motors
  • Embedded deep in the windings of the motors, the contacts are bi-metal cutout design which are temperature dependant.  Should the temperature of the motor rise to the limit, the bi-metal cut-outs activate and cut off the power, thereby providing full protection to the motor
  • EC Fans are available as an option

Low Ambient Control down to 0°C

  • Units can operate down to 0°C by using a combination of  on/off sequencing of the condenser fans and fan speed control
  • The fan speed is controlled through pressure transmitter of each refrigerant circuit via the unit controller with a speed regulation device

Low Ambient Control down to -17°C

  • In addition to the on/off sequencing of the condenser fans and speed control, a flooded condenser control design is used to enable the unit to operate at -17°C
  • Multiple on/off solenoid valves on each condenser with a suitable liquid receiver shall be added to control the amount of liquid flooding the condenser and maintain condenser head pressure within the permissible operating range
  • The liquid receivers used are designed and manufactured in accordance with Section VIII of  the ASME code and are marked with U or UM Code symbol stamps
  • Liquid receivers of 75mm through 150mm diameter are UL listed
  • These devices are used to permit the unit to operate in low ambient temperatures
  • Head pressure control can be applied by varying the speed for condenser fan motors

Heat Exchanger

  • High efficiency direct expansion (DX) shell and tube type coolers with inner grooved tubes to optimise efficiency
  • Coolers are tested and stamped for refrigerant side design pressure of 1,oookPa and for a water side working pressure of 1,500kPa
  • These working pressures comply with applicable sections of the ASME standard, and the European codes of ISPESL and TÜV
  • Coolers are equipped with internal water baffles in the shell which are fabricated from brass for maximum corrosion resistance
  • Coolers are provided with water vents and drain connection plugs and are insulated with 19mm closed cell foam insulation
  • Coolers are tested and stamped in accordance with ASME code
Petra Shell & Tube Evaporator

Petra Shell & Tube Evaporator

Cooler tape heater protection down to 0°C

  • Electrical resistance heating tape is wrapped around the evaporator shell to protect evaporator fluid contents from freezing at temperature down to 0°C ambient temperature
  • Continuous power supply to the chiller shall be provided to maintain operation of the heater for 24 hours, 7 days a week
  • This device will not protect external water pipe work connected to the unit for which additional frost protection measures are required

Cooler insulation material thickness

  • The cooler can be insulated with closed cell foam insulation of 25mm, 38mm or 50mm
  • The insulation density is 48kg/m³ with a k value of 0.035W/m.°K

Cooler cladding

  • Cooler cladding can be aluminium, stainless steel or painted galvanised steel (made from 22 gauge (0.7mm)
  • Cladding is applied over the cooler insulation

Refrigeration Circuit

Components of each refrigeration circuit:

  • Independant refrigeration circuit per compressor
  • Liquid line solenoid valve for models
  • Liquid line shut off valve for models
  • Liquid line moisture indicator sight glass
  • Replaceable core type filter
  • Chiller is fully charged with either R134a, R513a or R1234ze
  • High safety pressure switch (capsule type: factory pre-set)
  • Electronic expansion valve.  Electronically operated step motor flow control valves, intended for the precise control of liquid refrigerant flow.  Synchronised signals to the motor provdes discrete angular movement, which translates into precise linear positioning of the valve piston.  Easily interfaced with micrprocessor based controllers
Petra Electronic Expansion Valve

Petra Electronic Expansion Valve

  • Liquid, discharge and suction pipes are all hard copper pipes.  They are formed using automated CNC pipe-bending machines in order to minimise pipe-brazed joints which in turn increases system reliability
  • Epoxy paint is applied to all exposed copper piping systems of the refrigeration circuit
  • The hot gas bypass consists of a mechanical valve capacity regulator used to adapt compressor capacity to actual evaporator load.
  • It is installed in a bypass line between the high and low pressure sides of the refrigeration system and is designed for hot gas injection in the evaporator just after the expansion valve
  • The hot gas bypass valve is UL listed, file SA7200
  • The hot gas bypass valve allows additional capacity reduction for units operating below the minimum step of unloading for the compressor
  • If the hot gas bypass is installed on the lead compressor only, the lead/lag function (for the compressor) will be eliminated
  • Optional pressure gauges for monitoring the refrigeration discharge and suction pressure
  • Additionally, the gauges are used to verify suitable refrigerant charge and proper system performance
  • The gauges are Bourdon type, stainless steel housing, oil filled
  • Oil filling provides greater protection of the gauge internal environment from corrosive atmospheres
  • The gauges are provided with a dual scale of both PSI and BAR

Electrical

  • Compressor electronic current monitor and overload protection through controller
  • Free terminal for remote ON/OFF connection
  • Free terminal for general alarm output
  • Control voltage is 200-240V for all components
  • Single point power connection for each electrical panel
  • Starting contactors for compressors and condenser fan motors
  • Circuit breaker for each compressor
  • ON/OFF switch for each compressor
  • Control circuit breaker for short circuit protection
  • Short cycling protection for compressors (time delay)
  • Control transformer supplies all unit control voltage from main unit power supply to internal components such as (but not limited to) solenoid valves, compressor motor protector, compressor crank case heater and microprocessor controller
  • Microprocessor controller for full management of chiller operation and safety circuits
  • Power supply monitor (phase failure relay) used to protect the power circuit against over or under voltage conditions and against phase loss or loss reversing conditions

  • NEMA 3X with IP 54 minimum enclosure standard electrical panel
  • Two separate panels, one for power and the other for control
  • Electrical panel is eqipped with a heavy gauge galvanised steel access door
  • Panel is painted with oven baked polyester electrostatic powder paint
  • Each door is equipped with external handle with key and tooled latch
  • Doors contain sealing heavy duty clip-on bulb gasket between the door and the panel that provides effective sealing
  • All doors have multiple hinges
  • Each door has a door retainer to keep the door open during service
  • Each door has a built-in pocket to accomodate a laminated wiring diagram and IOM documents
  • Separate electrical box for condenser fan motors located on condenser side
  • Power factor correction is used to improve the power factor level
  • Maximising the power factor improves system reliability, minimises voltage drops and gives better power quality
  • Advance safety capacitors with harmonic filters and a main microprocessor controller are provided to manage the required capacity for the capacity stages
  • Only one capacitor panel is needed for the chiller regardless of the number of compressors or fans
  • The power factor correction capacitor is usually installed in a separate electrical box, but this depends on the unit size.  Please call us to discuss if this is of interest to you
  • The main disconnect switch with door interlock is used to de-energise the power supply to the chiller during service or repair works
  • It has an external handle that is installed on the the electric panel door
  • The switch has to be de-energised to open the electric panel door
  • The disconnect switch can be supplied with either an integrated fuse or a non-fuse type
  • Ampere and volt meters are used to measure the power current and the voltage consumption
  • An ampere meter is used for each phase
  • The volt meter is used to measure the voltage of power supply between each phase and the other, and between each phase and neutral
  • The chiller maybe supplied with a dual power connection
    • One power entry for the compressors
    • The second power entry for the rest of the unit
  • Each power connection can be equipped with a separate main disconnect switch
  • The earth leakage relay is used in electrical installations with high earth impedence to prevent electric shock
  • It detects small stray voltages on the metal enclosures of electrical equipment and interrupts the circuit if a dangerous voltage is detected
  • Earth leakage relay can be supplied for the whole unit power supply of for each compressor
  • External overload for each compressor
  • External overload for each condenser fan motor
  • Circuit breaker for each condenser compressor
  • Circuit breaker for each condenser fan motor
  • NEMA 4X electrical panels made from galvanised steel
  • NEMA 4X electrical panels made from stainless steel
  • Bulk head light for the electrical panel
    • IP 54 protection, class 1 electric safety bulk head light enclosure can be fitted in the electrical panel for inspection purposes.  The light fixture will be supplied without a bulb

Controls

  • Petra’s microprocessor control system enhances the air cooled smart chiller operation by providing the intelligent chiller control technology
  • The microprocessor control helps in the accurate control of various operating parameters
  • The system provides complete status on all operations both locally and remotely
  • The operating history, static and dynamic, helps in commissioning, troubleshooting and system evaluation
  • It interfaces locally via an ethernet connection as well as the Building Management System
  • The microprocessor control offers a great deal of flexibility with adjustable set points and control options that can be set prior to activating a system, or even when the unit is operational
  • The microprocessor controller is designed to safeguard the system that is being controlled, minimise the need for manual intervention, and to provide a simple but meaningful user interface

Start Up

For initial start up the following conditions must be met:

  • Control circuit breaker must be switched to on
  • Energise the microprocessor control through keypad, remote start/stop, schedule or BMS command
  • Chilled water pump running
  • Flow has been proven
  • All safety conditions satisfied

When the water in temperature is above the target set point, the first compressor will start after the call for cooling is received. The control strategy is designed to modulate the chiller capacity to maintain the control sensor reading within the specified control band.  To accomplish this, the microprocessor controller will constantly monitor the control value, its rate of change and position in relationship to the control band and make adjustments accordingly.

Capacity Control The capacity control logic will control the sequence of operation for the compressor as follows:

  • If the chilled water-in temperature is above the set point, the chiller’s capacity control logic will ask for more capacity by adding a cooling step.  Once the step control has increased, the capacity control logic has a time delay before allowing the new step to increase again.  This time delay depends on how far the temperature is from the target set point
  • If the chilled water-in temperature is within the control band, special logic functions will maintain the chiller within the control band
  • If the chilled water-in temperature is below the control band, the chiller’s capacity logic asks for less capacity by subtracting from the steps.  Once the step has been decreased, the capacity control logic has a time delay before allowing more steps to be decreased again

Low Suction Unloading and Holding

This protection is activated when the setpoint (LOW SUCTION UNLOAD) is achieved. The purpose of this protection is to take corrective action prior to a safety being tripped

High Discharge Pressure Unloading and Holding

This protection is activated when the setpoint (HIGH DISCHARGE UNLOAD) is reached.  The purpose of this protection is to take corrective action prior to a safety being tripped.  The system will begin unloading the compressor until the discharge pressure  drops below a calculated value

Soft Load Function

The compressors will start un-loaded to ensure a soft start function and will load gradually according to load demand.  This prevents sudden load changing and increases energy efficiency

Low Water Out Temperature Protection

  • The chiller water out temperature could cause the system to unload (switch off compressors)
  • When the water out temperature approaches the Freeze Set Point, the unload occurs before the freeze protect safety is reached

Chilled Water Reset This is a function of a signal from the building management system.

  • The value is used to adjust the control set point
  • The amount of the actual adjustment is proportionally based on the associated analog input value
  • The analog value can be between 0 and 10 volts

Operating Schedules Operating schedules per day of the week and 8 holidays are supported by the microprocessor controller software

  • Each schedule contains a start and end time
  • If the time and day of the microprocessor controller clock is within these limits then the schedule is true and the system will be allowed to run
  • If not, the system will be off due to schedule

Electronic Expansion Valve Driver

  • This driver, with double pole stepper motor, is designed to control the electronic expansion valve in the smart chillers.
  • It controls refrigerant super heat and optimises the efficiency of the refrigeration circuit to guarantee the maximum flexibility

Ultra Cap Module

  • The ultra cap EVD module guarantees temporary power to the driver in case of power failures, for enough time to immediately close the connected electronic valves
  • This avoids the need to install a solenoid valve

Displayed Data

  • Leaving/ entering water temperature
  • Ambient temperature
  • Compressor discharge pressure / temperature (option)
  • Compressure suction pressure / temperature (option)
  • Compressor drawn current (option)
  • Suction/discharge super heat [if pressure/temp sensors available]
  • Saturation suction/discharge [if pressure/temp sensors available]
  • Compressor timers
  • Digital input status
  • Output relays status
  • Protections status
  • Historical alarms
  • Schedule
  • Adjustable set point

 Safeties and Alarms

  • Cut out and unloading
  • High discharge pressure/temperature [if pressure/temp sensors available]
  • Low suction pressure/temperature [if pressure/temp sensors available]
  • Freeze state
  • High ampere state [if current transformers available]
  • Low discharge pressure [if pressure/temp sensors available]
  • Unsafe suction pressure [if pressure/temp sensors available]
  • Unsafe discharge pressure [if pressure/temp sensors available]
  • Flow switch (no flow protection)
  • Phase loss protection
  • Motor temperature
  • Low motor amps [if current tranformers available]
  • Probe error alarm

Smart Link II Controller supports the following protocols

  1. Bacnet IP
  2. Modbus IP
  3. Modbus RTU
  4. Bacnet MS/TP [requires BMS Gateway Module]
  5. Johnson N2 [requires BMS Gateway Module]
  6. Lontalk [requires BMS Gateway Module]

RS 485 Network

The controller RS 485 Network can support up to 20 chiller controllers and their associated I/O’s

  • Access to this network can be local, via RS 232 connection or remote via 14.4K band modem
  • When using the dial up through the modem, there will be no degradation in the performance of the network
  • Each controller in the network must be assigned to a unique address
  • This address will be the key to establishing communications with the appropriate controller system
  • This address can be changes from the LCD/keypad of the unit
  • The current address of the controller can be viewed or chaanged with factory authorisation
  • RS 232 transmission should not exceed 1000 metres without repeater
PC Support for Smart Link II Controller

  • MCS – Connect program provides both local and remote communications to the controller, independent of the type of software
  • This program enables visibility of the status of the controller and authorised changes can be made to the system
  • The controller automatically performs history logging and has graphic functions

Ethernet Port

  • Communications can be through the 100 MBPS Ethernet Communications port on the controller
  • It is necessary to use a crossover cable when connected directly to this port from a PC BMS Communication protocol

Petra Touch Screen Controller – Optional

Within the hardwired structure, there are six features, as follows:

  1. RUN/STOP – [BMS to Controller]
  2. EMER. STOP – [BMS to Controller]
  3. CHILLED WATER RESET – [BMS to Controller]
  4. DEMAND LIMITING – [BMS to Controller]
  5. COMPRESSOR RUN – [Controller to BMS]
  6. ALARM – [Controller to BMS]

 

 

 

Other Optional Accessories and Chiller Upgrades

Compressor Jacket

  • The compressor jackets consist of 9.5mm thick closed cell rubber sound insulation material inside a sound deflecting vinyl cover to provide superior sound reduction for scroll compressors

Standard Compressor Compartment

  • A standard compressor compartment is constructed from gauge 16 (1.5mm) thick galvanised steel sheet metal insulated with 9.5mm thick closed cell rubber insulation.  All sheet metal is painted with Petra powder paint

Advanced Compressor Compartment

  • The advanced compressor compartment is constructed from a double wall, heavy gauge galvanised steel
  • The wall is gauge 14 (2mm) outer skin and gauge 22 (0.7mm) perforated inner skin
  • There is a 50mm thick fibreglass insulation with a density of 48kg/m³ between the inner and outer skins

NB:

  1. The above options are available in certain combinations in order to achieve the lowest possible sound emissions.  
  2. Please note that the compressor compartment installation might change the overall chiller dimensions
  • The water flow switch is supplied as a loose item for field installation
  • CE approved safety interlock to prevent operation operation of the chiller without evaporator water flow
  • The water flow switch functions as a safety that assumes water flow rate with the shell and tube (Barrel) cooler and sends a signal to shut off the chiller if no water flow exists due to pump failure or other causes
  • It is a paddle type flow switch
  • The paddle consists of three segents that can be removed or trimmed and sized to fit the water pipe size
  • The paddle is made of copper alloy
  • Pressure relief valves are installed in accordance with the requirments of the ASME (Boiler and Pressure Vessel Code Section VIII, Division 1)
  • The pressure is relieved by allowing the pressurised fluid to flow from an auxilliary passage out of the system to the atmosphere
  • The relief valve is designed to open at a pre-determined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits
  • Heat Pump Chillers that may be used to provide heating in the winter are also available.  Please contact us for more information
  • Simultaneous heating and cooling chillers are also available to provide heating and cooling to different areas at the same time.  Please click here for more information, or get in touch here if this is of interest to you
  • The 120V single phase power supply is provided through the transformer that may be connected before or after the non-fused main disconnect switch
  • GFI socket is used to operate electrical devices on site, such as laptops, tablets and mobile phones

Control Transformer

  • The control transformer is to supply power input to auxillary compnents at 120 or 220 volts, such as (but not limited to) bulk head lights or the GFI Outlet

APS Range of Air Cooled Chillers

The APS range of Air Cooled Chillers is available with either refrigerant R513a or R134a.  Details of APS chillers with the refrigerant R1234ze is available on request.

The model references,  capacities, dimensions, sound data and shipping weight is given in the tabs above, but for more detailed information please call us on 0118 988 0101.

APS Model
60-1
65-1
70-1
70-2
75-1
80-1
95-1
95-2
100-1
100-2
110-2
120-2
125-2
135-2
140-2
145-2
160-2
165-2
175-2
190-2
195-2
200-2
205-2
210-2
220-2
235-2
250-2
275-2
280-2
285-2
300-2
315-2
315-3
335-2
350-2
350-3
360-3
375-3
400-3
415-3
430-3
450-3
465-3
475-3
485-3
500-3
510-3
550-4
580-4
600-4
Capacity
176.9
195.9
207.9
211.7
235.6
259.2
283.8
282.8
317.9
317.6
337.3
354.9
370.7
409.7
437.5
455.5
481.5
503.3
531.8
547.9
581.0
600.4
651
662.6
687.9
743.5
794.5
840.9
835.6
871.9
911.6
967.5
963.7
1049.8
1081.1
1090.3
1116.6
1143.7
1225.0
1316.4
1343.1
1372.3
1406.4
1456.7
1485.9
1507.7
1538.0
1622.7
1743.4
1810.9
EER
3.43
3.34
3.29
3.13
3.27
3.19
3.12
3.03
3.03
2.94
3.27
3.21
3.14
3.16
2.98
3.20
3.17
3.13
3.00
3.15
2.99
3.17
3.34
3.10
3.33
3.22
3.11
3.07
3.33
3.01
3.23
3.14
3.09
3.09
3.27
3.21
3.36
3.13
3.21
3.08
3.20
3.00
3.15
3.08
3.20
3.03
3.14
3.15
3.01
3.06
ESEER
4.82
4.81
4.81
5.01
5.13
5.23
5.32
5.13
5.3
5.01
5.17
5.17
5.14
5.16
5.07
5.14
5.19
5.13
5.12
5.03
5.12
5.22
5.36
5.31
5.32
5.3
5.26
5.31
5.39
5.17
5.34
5.28
5.34
5.28
5.47
5.35
5.39
5.33
5.38
5.27
5.34
5.35
5.34
5.34
5.41
5.35
5.4
5.39
5.17
5.21
SEPR
5.46
tba
5.11
tba
5.5
5.36
5.43
5.14
5.3
5.16
5.31
5.18
tba
5.55
tba
tba
tba
tba
tba
tba
tba
tba
5.53
tba
5.52
5.54
tba
tba
tba
tba
5.63
tba
tba
tba
tba
tba
5.59
tba
5.56
5.54
5.58
5.53
5.58
5.62
5.65
5.6
5.57
5.92
tba
5.64
SSCEE [%]
175.4
174.5
173.9
177.2
186.3
188.2
191.5
183.2
190.1
179.9
185.0
184.8
183.4
186.5
182.4
185.2
187.0
184.4
182.9
180.2
183.9
187.2
191.2
188.3
188.9
186.4
183.4
188.0
191.6
182.7
189.4
186.2
186.9
186.6
192.5
187.8
189.1
185.9
186.0
179.0
182.2
179.5
179.1
182.1
183.9
181.1
182.2
193.1
184.8
190.3
Shipping weight [kg]
2288
2317
2348
2648
2621
2711
2734
3045
2810
3208
3941
3981
3900
4098
4322
5180
5284
5370
5302
5862
5439
6063
6122
5529
6095
6402
6714
7140
7684
7249
7997
8072
8240
8261
8863
8745
9755
9376
10392
10652
11620
10783
11769
12754
11697
11976
12735
14313
14666
14828
Length [mm]
3160
3160
3160
3360
3160
3160
3160
3360
3160
3360
4740
4740
4740
5140
5140
6120
6120
6120
6120
7300
6120
7300
7500
6520
7500
7700
7700
7700
8780
7700
8780
8780
8980
9180
10160
10560
11540
10660
11640
11640
13020
11640
13020
13020
14400
13020
14400
14400
14400
14400
Width [mm]
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
Height [mm]
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2870
2870
2870
Sound power [dB]
92
92
91
92
92
94
95
94
94
93
94
95
96
97
95
96
97
91
92
92
91
92
92
94
94
95
93
94
94
95
96
95
97
96
91
97
92
92
94
94
95
93
94
94
95
96
97
95
96
97

*All stated kW capacities and efficiencies are based on 35°C ambient temperature, 12/7°C water entering / leaving temperature and 50Hz power supply.

Where compliance with EcoDesign (Tier 2) is required, all chillers are equipped with one compressor with a VFD 

APS Model
60-1
65-1
70-1
70-2
75-1
80-1
95-1
95-2
100-1
100-2
110-2
120-2
125-2
135-2
140-2
145-2
160-2
165-2
175-2
190-2
195-2
200-2
205-2
210-2
220-2
235-2
250-2
275-2
280-2
285-2
300-2
315-2
315-3
335-2
350-2
350-3
360-3
375-3
400-3
415-3
430-3
450-3
465-3
475-3
485-3
500-3
510-3
550-4
580-4
600-4
Capacity
176.9
195.9
207.9
211.7
235.6
259.2
283.8
282.8
317.9
317.6
337.3
354.9
370.7
409.7
437.5
455.5
481.5
503.3
531.8
547.9
581
600.4
651
662.6
687.9
743.5
794.5
840.9
835.6
871.9
911.6
967.5
963.7
1049.8
1081.1
1090.3
1116.6
1143.7
1225
1316.4
1343.1
1372.3
1406.4
1456.7
1485.9
1507.7
1538
1622.7
1743.4
1810.9
EER
3.43
3.34
3.29
3.13
3.27
3.19
3.12
3.03
3.03
2.94
3.27
3.21
3.14
3.16
2.98
3.20
3.17
3.13
3.00
3.15
2.99
3.17
3.34
3.10
3.33
3.22
3.11
3.07
3.33
3.01
3.23
3.14
3.09
3.09
3.27
3.21
3.36
3.13
3.21
3.08
3.20
3.00
3.15
3.08
3.20
3.03
3.14
3.15
3.01
3.06
ESEER
4.82
4.81
4.81
5.01
5.13
5.23
5.32
5.13
5.3
5.01
5.17
5.17
5.14
5.16
5.07
5.14
5.19
5.13
5.12
5.03
5.12
5.22
5.36
5.31
5.32
5.3
5.26
5.31
5.39
5.17
5.34
5.28
5.34
5.28
5.47
5.35
5.39
5.33
5.38
5.27
5.34
5.35
5.34
5.34
5.41
5.35
5.4
5.39
5.17
5.21
SEPR
5.46
tba
5.11
tba
5.5
5.36
5.43
5.14
5.3
5.16
5.31
5.18
tba
5.55
tba
tba
tba
tba
tba
tba
tba
tba
5.53
tba
5.52
5.54
tba
tba
tba
tba
5.63
tba
tba
tba
tba
tba
5.59
tba
5.56
5.54
5.58
5.53
5.58
5.62
5.65
5.6
5.57
5.92
tba
5.64
SSCEE [%]
175.4
174.5
173.9
177.2
186.3
188.2
191.5
183.2
190.1
179.9
185
184.8
183.4
186.5
182.4
185.2
187
184.4
182.9
180.2
183.9
187.2
191.2
188.3
188.9
186.4
183.4
188
191.6
182.7
189.4
186.2
186.9
186.6
192.5
187.8
189.1
185.9
186
179
182.2
179.5
179.1
182.1
183.9
181.1
182.2
193.1
184.8
190.3
Shipping weight [kg]
2288
2317
2348
2648
2621
2711
2734
3045
2810
3208
3941
3981
3900
4098
4322
5180
5284
5370
5302
5862
5439
6063
6122
5529
6095
6402
6714
7140
7684
7249
7997
8072
8240
8261
8863
8745
9755
9376
10392
10652
11620
10783
11769
12754
11697
11976
12735
14313
14666
14828
Length [mm]
3160
3160
3160
3360
3160
3160
3160
3360
3160
3360
4740
4740
4740
5140
5140
6120
6120
6120
6120
7300
6120
7300
7500
6520
7500
7700
7700
7700
8780
7700
8780
8780
8980
9180
10160
10560
11540
10660
11640
11640
13020
11640
13020
13020
14400
13020
14400
14400
14400
14400
Width [mm]
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
2230
Height [mm]
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2530
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2570
2870
2870
2870
Sound power [dB]
92
92
91
92
92
94
95
94
94
93
94
95
96
97
95
96
97
91
92
92
91
92
92
94
94
95
93
94
94
95
96
95
97
96
91
97
92
92
94
94
95
93
94
94
95
96
97
95
96
97

*All stated kW capacities and efficiencies are based on 35°C ambient temperature, 12/7°C water entering / leaving temperature and 50Hz power supply.

Where compliance with EcoDesign (Tier 2) is required, all chillers are equipped with one compressor with a VFD 

Data for APS chillers with the refrigerant R1234ze is available on request.  Please contact us here for more information.