dixell ichill IC260L, User Manual

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1592015300 User manual iCHILL 200 L GB r1.3 09/09/2005
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ATTENTION
The display resolution is 0.1°C until the read-out is 99.9, over 100°C it is 1°C.
32 WATER PUMP OF THE EVAPORATOR / SUPPLY FAN
32.1 WATER PUMP OF THE EVAPORATOR / SUPPLY FAN (
AIR
/
AIR
)
With only one evaporator water pump configured, the parameter CO19 / CO20 values do not affect the water pump functioning itself.
The water pump regulation involves the following modes:
Operative modes of the parameter CO16 of evaporator pump / Supply fan
CO16=0:
Not enabled: water pump/supply fan not managed.
Attention: The air / air unit configured with CO16= 0 does not manage the output for integration heaters.
CO16 = 1: Continuous control.
The water pump/ supply fan are running only if the unit is running (chiller, heat pump). After giving the start in chiller or heat pump mode
the compressor regulation starts only after the time delay CO17.
The water pump/ supply fan are turned off only when the unit is turned off (stand-by) and, if CO18<>0, the water pump/ supply fan turns
off only after the this delay.
When the unit is in stand-by or remote off and the Ar09 =1, if the thermoregulation requires the antifreeze heaters also the water pump
is turned on.
CO16 = 2: on compressor demand.
When the compressor turns on also the water pump/ supply fan are turned on. In both chiller and heat pump modes the water pump/
supply fan starts CO17 before the compressor. When the last compressor is turned off the water pump/ supply fan is turned of after the
CO18 delay.
When the unit is in stand-by or remote off and the Ar09 =1, if the thermoregulation requires the antifreeze heaters also the water pump
is turned on.
The pump is always off when:
Remote OFF from digital input.
Digital input active of the water pump overload.
Digital input active of the evaporator water pump flow with MANUAL alarm.
During the defrost and when the compressor is off in dripping time the pump/supply fan is on.
32.2
HOT START
( S
UPPLY FAN
)
ONLY FOR AIR
/
AIR UNIT IN HEAT PUMP MODE
The hot start function is available only for air/air unit configured with heat pump and it is active only during the heat pump mode.
It allows to start the supply fan only if the evaporating/condensing probe temperature is hot enough to avoid to introduce cold air flows.
FA24 Hot start Setpoint.
It is the temperature setpoint to stop the supply fan when the NTC probe of the evaporator #1 output or the evaporator #2 output or the
evaporator common output value is lower.
FA25 Hot start differential
Temperature differential of the hot start function.
33 EVAPORATOR PUMP GROUP
If two relay outputs are configured as evaporator water pump and support pump of the evaporator automatically the pump group control
is enabled.
First start-up of the unit: the running hours of the two pumps are both 0, if CO16=1 or 2 (continuous or on compressor demand pump
mode) by default the pump #1 is turned on. The successive restart of the unit is made with the pump #2.
During the normal functioning condition when the unit changes from a stand-by /remote off/ power off status to chiller or heat pump
mode the pump that is running is switched off and immediately the one with less running hours is turned on.
When the unit goes in stand-by or remote off the pump stays on for the time set in CO18.
When the unit is in stand-by or remote off and the Ar09 =1, if the thermoregulation requires the antifreeze heaters also the water pump
is turned on.
33.1 E
VAPORATOR WATER PUMP ROTATION
Par. CO19 <> 0 to enable the function.
Durning the normal functionning condition, both for chiller and heat pump, if one pump reaches the running hours of the CO19
parameter, the pump is turned off while the other pump is re-activated.
If the CO20 <> 0, before changing from one to the other the two pumps work together for the time set in this parameter. If CO24=0 the
rotation is immediate and CO20 is not counted.
ATTENTION
The CO17/CO18 values, on and off delay between compressors and pumps, are calculated also for the pump group.
33.2 E
VAPORATOR
W
ATER
P
UMP ROTATION THROUGH DIGITAL INPUT CONTROL
With two digital inputs configured as overload alarm of water pump and support pump the rotation is enabled when the digital input of
the running pump becomes active. That pump is turned off while the other is forced on.
If the digital inputs are configured as evaporator water pump alarm and condenser water pump alarm the active digital input alarm stops
the corresponding pump.