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USER MANUAL – Release 1.2 of 01/01/2010
Page 110 of 191
Version: 02/03/2010
If a N° of peaks set in the parameter is reached by a compressor in 15 working minutes (maximum n° of compressor peaks), in the case
of other available steps the next temperature control request is turned to the latter.
32. COMPRESSORS IN TANDEM
It is possible to establish the maximum continuous working time of a compressor, on the expiry of which the
compressor is switched-off and another compressor is switched-on (the compressor will be chosen
according to the least working hours/least peaks per hour logic)
33. COMPRESSORS MAINTENANCE REQUEST FUNCTION
THE PARAMETERS FROM CO53 TO CO68
are the
working timer set from compressor n° 1 to compressor
n° 16
They establish the number of working hours of the compressor/s, beyond which a maintenance request is
made. (the working timer threshold 0 value disables the function). The function is also disabled if the relay is
configured as compressor partialisation
34. EVAPORATOR WATER PUMP WORKING
34.1 ONLY ONE RELAY CONFIGURED AS EVAPORATOR WATER PUMP
If only one relay is configured as condenser water pump, any values the
rotation pars
. assume, they will not
intervene with water pump outlet working.
Regulation of the water pump takes place:
If the
Evaporator pump operational mode
Par.
0
= Absent the pump is not managed
1
= Continuous Working. Pump switch-on is linked to unit switch-on
If the parameter
PA02
is different to 0 by selecting the cooling heating mode the heat regulator requests
compressors switch-on, this only takes place if the time set has passed
The water pump only deactivates when the unit switches-off (unit in stand-by). If parameter
PA04
is different
to 0 by positioning the unit in stand-by the water pump switches-off after the time set in the parameter.
2
= Working on compressor call. Pump switch-on/off is linked to compressor switch-on/off both in cooling and
heating working mode, in the case of compressor switch-on request due to temperature control. If parameter
PA02
is different to 0 the water circulation pump is activated first and after the fixed time has passed also the
compressors.
If the heat adjuster requires compressor switch-off and the parameter
PA03
is different to 0, first the
compressors are deactivated and then when the set time has passed, also the water circulation pump.
If the parameter
PA04
is different to 0 by positioning the unit in stand-by the water pump switches-off after
the time set in the parameter.
The pump is switched off if:
The unit is positioned in OFF from remote
digital input configured as condenser water pump circuit breaker is active.
digital input configured as active evaporator water flow switch with manual reset alarm
(in defrost mode in the periods in which the compressor is in OFF mode for dripping, the pump
remains on)
