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USER MANUAL – Release 1.2 of 01/01/2010
Page 114 of 191
Version: 02/03/2010
(in defrost mode in the periods in which the compressor is in OFF mode for dripping, the pump
remains on)
If only one pump is configured, the pump keeps working; if two pumps are configured, there is the
rotation.
41. CONDENSER WATER PUMP ROTATION
41.1 2 RELAYS CONFIGURED AS CONDENSER WATER PUMP
If 2 relays are configured on as condenser water pump and one as condenser support water pump, pumping
unit management is enabled.
The rotation depends on the value of the
pumps rotation enabling
Par.
0
= no rotation
1
= manual inversion
The moving pump depends on the value of the pumps manual inversion Par. 0 = pump n° 1 1 = pump n° 2
2
= start rotation
Unit commissioning in stand-by, n° or working hours of both equal to 0. Pump N° 1 is started-up as default
when the unit starts. When the unit is put in stand-by/OFF remote/power OFF, pump n° 2 starts at the next
start-up. Successively, in normal working conditions from the passage between stand-by/OFF remote/power
OFF and a cooling or heating working state, the pump running is switched off and the one with the least
number of working hours is switched-back on.
3
= rotation at working hours
If the par.
PA23
is different to 0 (otherwise the function is not enabled) in normal working with the unit in
cooling or heating mode, if one of the two water pumps reaches the hours set, the operating pump is
switched-off and the pump is switched-on in stand-by. If par.
PA24
is different to zero (simultaneous pump
working enabled) the pumps function simultaneously for the time set in parameter
PA24
then the one with
most hours of working switches-off.
4
= start rotation plus working hours
A sum of the workings is made with configuration n° 2 plus configuration n° 3. The pump rotates every time
that the unit is switched-off and when the working hours are reached.
Warning, also with the pumping unit function enabled the switch-on/off times between the
compressors and pump are respected.
41.2 ROTATION OF THE CONDENSER WATER PUMPS FROM DIGITAL INPUT
The function is enabled if:
The
pumps rotation enabling
par. is
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0 and two digital inputs have been configured, one as a condenser
water pump circuit breaker and one as condenser support water pump circuit breaker. Pumps rotation from
digital input is enabled in normal working. When a circuit breaker input intervenes it switches the
corresponding pump off and the other switches on automatically, independently from the working hours.
If only 1 digital input is configured as condenser water pump circuit breaker or only one digital input as
condenser support water pump in normal working, when a circuit breaker input intervenes it only switches
the corresponding pump off.
(in defrost mode in the periods in which the compressor is in dripping OFF mode, the pump remains
on)
42. CONDENSER PUMP ANTI-FREEZE MANAGEMENT
It is possible to manage pump working when the device is in OFF or Stand-by with anti-freeze function mode
to protect the condenser
Par. PA09
determines pump working when the device is in OFF or Stand-by
0= always off in OFF remote or Stand-by mode
1= on in parallel to the anti-freeze heaters
2= on in OFF remote or Stand-by (on depending on the request of the heat regulator)
Par. PA10
Pump working temperature control probe
0= disabled
