Airwell CLH 602 [3/28] Control
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Airwell CLH 602 [3/28] Control

Airwell CLH 242 [3/28] Control
Page 3
Technical Features (continued)
Power and control panel
The control compartment shall contain an electronic circuit board
and a key control panel with display of operating parameters,
alarms and stops.
Thermal relays and fuses are supplied to protect compressors, fans
and pumps from overloading.
Control and safety devices
Each CLH unit is fitted with the following devices :
Safety :
Fan thermal protection.
Compressor thermal protection.
Water differential pressure switch.
High pressure switch.
Evaporator antifreeze protection.
Low pressure switch.
Crankcase heater.
Control :
Evaporator water inlet temperature sensor.
Evaporator water outlet temperature sensor.
Coil temperature sensor.
Factory-installed accessories and options
Coils with blue fins covered with a coating easing the flowing of
water.
Coils with "Silverguard" (polyurethane) coated fins.
Coils with copper fins.
LP & HP manometers.
Condenser coil guards.
Integrated hydraulic module with water tank, antifreeze
resistance and 1 or 2 pumps.
Extra electric heating for hydraulic module.
Pump kit with 1 or 2 pumps.
Compressor overload protection kit.
Phase monitor.
Stepless fan speed controller (STD and LN versions only).
Field-installed accessories
Water filter.
Flow switch.
Spring anti-vibration mounts.
Remote control kit (On/Off, Heating, Cooling).
Modbus interface kit.
Remote keyboard panel.
Chiller sequencer (4 units maximum).
Control
Controller display panel Remote control kit
(optional)
The controller provides information on status of operation, configuration and alarms through a
display and LEDs on the front panel.
Display
It allows mainly to show :
- the entering water temperature of the unit in tenths of degrees Celsius with a decimal point,
- the alarm code if at least one alarm is active.
LEDs
1 Heating mode display
2 Cooling mode display
3 Operating mode selection
4 Unit On/Off; Alarm restoration
5 Display
6
Compressor 2 ON LED
(Blink : time delay in progress)
7 Electric resistance ON LED
8
Compressor 1 ON LED
(Blink : time delay in progress)
9 Voltage ON LED
10 Unit activated alarm LED
11 Start key and LED - Cooling
12 Start key and LED - Heating
If neither HEATING LED nor
COOLING LED is ON, the
controller is in STANDBY mode.
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