OPTIMA / MAYA SERIES · HEAT PUMP AIR/WATER
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ENGLISH
6.4.4
AUTO MODE (CHILLER MODELS)
Start-up process:
Start-up conditions: Water intake temperature < (Setpoint temperature - Auto mode
temperature differential); Compressor stop time ≥ Compressor delay time, then it enters Heat
mode.
If the water intake temperature > (Setpoint tempe Auto mode temperature differential);
and the Compressor stop time ≥ Compressor delay time, then it enters Cool mode.
Stop process:
Compressor 1 stops, Compressor 2 stops 10s later, the fans stop and the water pump stops 30s
later.
6.4.5
DEFROST FUNCTION
The controller will supervise the temperature in the evaporators when the machine is in
heating mode, and decide whether need to defrost
according to the working time of the machine in that
continuous low temperature state. In other words, the
defrosting calculagraph begins to count when the
machine evaporator temperature is lower than “defrost
start temperature”, and turns on the defrosting when
the value of time reaches “defrost start time”. The
calculagraph will be cleared if the evaporator
temperature is higher than “defrost start temperature” when counting, and it begins to
count again when the evaporator temperature is lower than “defrost start temperature”. In
other words, the value of defrosting calculagraph shows the continuous low temperature
working time of the machine (For 2 compressor systems as long as a compressor system
satisfies the conditions for defrosting, the other system will also defrost).
DEFROST SEQUENCE:
The controller can check the defrosting effect with the external air temperature. if the external
air temperature is higher than the “defrost end temperature”, the controller will turn off the
function of defrosting. If the defrosting time is over “max defrost time”, the controller will turn
No.
DEFINITION
FILTER PUMP
SINGLE PHASE
THREE PHASE
PROHEAT II
SCHEDULE TIMER
