Emerson Dixell iChill IC200D EVO Series, Инструкции по установке и эксплуатации

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1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10 IC200D 67/192
6 compressors are running; if CO49 = 2 in case of unloading 2 compressors are switched off and 4
continuous to work.
UNLOADING DE-ACTIVATION IN CHILLER MODE
When the condenser pressure or condenser temperature falls below CO44-CO45 the unloading function is
disabled and all compressor are available to work.
Other information about the Unloading in chiller
If the condenser pressure or condenser temperature remains between CO44 and CO44-CO45, after CO48
time the unloading function is deactivated.
UNLOADING IN HEAT PUMP MODE
The reference probe for this function is the evaporator probe; if any evaporator probe is configured, the
function uses the condenser probe.
When the evaporator/condenser pressure is lower than CO46 the unit works with the number of compressors
selected in CO49 parameter or CO96 speed in case of inverter compressor.
If the compressor is a screw compressor the unloading function works at least CO50 time; if CO50 = 0 this
function is disabled.
EXAMPLE
2 circuits and 3 compressors per circuit
6 compressors are running; if CO49 = 2 in case of unloading 2 compressors are switched off and 4
continuous to work.
UNLOADING DE-ACTIVATION in HEAT PUMP MODE
When the evaporator probe (orcondenser pressure or condenser temperature) increase over CO46+CO47
the unloading function is disabled and all compressor are available to work.
Other information about the Unloading in Heat Pump
If the evaporator probe (or condenser pressure or condenser temperature) remains between CO46 and
CO46+CO47, after CO48 time the unloading function is deactivated.
22.3 LOW TEMPERATURE OF THE EVAPORATOR WATER OUTLET
ACTIVATION
The lower value between the inlet evaporator probe, common outlet evaporator probe or outlet probe for the
circuit, enables the unloading function.
When the value of one of the probes above decrease under the set point CO55 the unloading function is
activated; the number of active compressors/step is determined by the CO49 parameter or CO96 speed in
case of inverter compressor.
The display shows the label
b1EU
– b2EU
alternated to a default visualization.
DE-ACTIVATION
Unloading function is disabled when the temperature of all the probes configured rise over CO55 + CO56 or
when the CO57 time is elapsed.
22.4 UNLOADING BY DIGITAL INPUT
The function is always active and enabled in chiller operation with at least two steps of power in a circuit.
If the unloading is active, the display shows b1CU and / or b2CU.
In case of activation by digital input (which coexists with all types of current unloading), the number of
compressors on the circuit is brought to the value set in the parameter CO49 and, in case of inverter
compressor, the speed is brought to the value set by CO96 parameter.
The unloading condition will remian till the digital input is active.