Airwell AQCL 120 [3/20] General specifications continued
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Airwell AQCL 120 [3/20] General specifications continued

Airwell AQCL 120 [3/20] General specifications continued
Page 3
General Specifications (continued)
Evaporator
- Direct expansion type, made of brazed stainless steel plates.
- The evaporator is surrounded by an electrical heating resistance
and insulated with cellular polyurethane foam to provide anti-
freeze protection.
Air cooled condenser coil
Condenser coil consists of seamless copper tubes arranged in
straggered row pattern.
The coil is mechanically expanded into aluminium fins with full fin
collars.
Condensate drain pan, with two outlet pipes on both ends, is
supplied underneath the condenser coil.
Condenser fans and motor
Fans are of belt driven centrifugal type capable of providing
external static pressures (standard and high pressures) to overcome
the ductwork air resistance.
Variable pitch pulley is supplied as standard to allow air flow to be
adjusted.
Electrical motor is of IP55 type and mounted on sliding plate
allowing belt tension adjustment to be performed, by way of a
single screw, without having to slacken the motor mounting.
Motor is protected by a circuit breaker. Optional high static motor
can be supplied for high external static pressure applications.
Fan discharge arrangement
The fan discharge of each unit can be configured in 3 different
arrangements compared with horizontal return air :
- Standard horizontal discharge (same side as return),
- Optional vertical discharge,
- Optional opposite horizontal discharge.
At the discharge side, a duct collar is supplied as standard.
Refrigerant circuit
The refrigerant circuit comprises all the required components such
as filter-dryer, sight glass with moisture indicator and thermostatic
expansion valve. It also comprises high and low pressure sensors,
as well as sensors for inlet and outlet water temperatures and a
discharge temperature sensor.
To facilitate maintenance operations, the low and high pressure
sections of the refrigerant circuit are equipped with pressure tapping
points.
All the refrigerant components and pipe work are brazed, thus
eliminating any risks of leakage and ensuring total, long lasting
circuit tightness.
Pressure transducers replace the HP (High Pressure) and LP (Low
Pressure) pressostats, along with their capillary tubes (principal
source of leaks).
The refrigerant circuit is optimised to operate with HFC 407C
refrigerant.
Electrical panel
Access to the electrical panel is possible after having taken off the
panel, removable by just releasing the fixing screws.
The following equipment is mounted on the power circuit side
of the electrical panel : a power supply connection terminal
block - 400 V / 3 Ph / 50 Hz + Neutral, a main switch, a phase
controller (allowing the presence and the order of the phases to be
detected), contactors and magneto-thermal circuit breakers for the
compressors, fans and hydraulic pump (if fitted). On the control
circuit side of the panel, the ILTC control electronic circuit board
with its 230 V single phase power supply is mounted.
Integrated hydraulic module
An integrated hydraulic module is available for all AQCL units,
offering savings in installation times and reducing installation costs.
Each hydraulic module comprises the following components :
On models 25 to 35 : Automatic air bleed valve, differential
pressostat, drain cock, expansion tank, safety valve, pressure
gauge, hydraulic pump and water filter (supplied loose).
On models 40 to 130 : Automatic air bleed valve, water flow
adjustment valve, water flow switch, drain cock, expansion tank,
safety valve, pressure gauge, hydraulic pump and water filter
(supplied fitted).
As standard, all pumps produce available pressure higher than
100 kPa.
Other standard equipment
Water flow switch or differential pressostat : For AQCL units
without an integrated hydraulic module, a factory-fitted differential
pressostat (for models 25 to 35) and a factory-installed paddle type
water flow switch (for models 40 to 130) are supplied as standard.
Water filter : Supplied loose on units without integrated hydraulic
module.
Accessories and options
➜ Anti-vibration pads : Rubber anti-vibration pads, to be fitted
on site by the installer.
➜ Anti-vibration mounts : Visible spring anti-vibration mounts,
for on site fitting by the installer.
➜ Compressor jacket : Supplied fitted.
➜ Condenser coil protective coating :
- aluminium fins with hydrophilic coating.
- aluminium fins with polyurethane coating.
➜ High static motor.
➜ Remote control terminal : Hard-wired control enabling the
unit’s Start / Stop functions to be controlled remotely.
➜ Low ambient kit (-7 °C) : Factory-fitted option consists of
frequency inverter acting on the motor in order to keep fan
speed under control.
➜ Chiller sequencer : Supplied loose, it allows a control up to 4
units.
➜ Water isolating valves : Supplied loose.
➜ Water flow switch : Factory-installed option for models 25 to
35.
➜ Double water pump.
➜ Inlet air duct collar.

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