RDZ UMHPI, User Manual

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UMHPI
Industrial inverter air/water heat pumps with axial fans
12
The adjustment of the circulator is linear (see Paragraph 7.3.5). Please see paragraph 11.6 for changing the parameters.
7.3.1 OPERATION BY MEAN OF THE THERMOREGULATOR (Default)
During this operating mode ( P03=1 , default), the thermo-regulator actuates the circulator; after a time delay of P01 seconds from
startup of the circulator pump, the compressor also will turn on. However, during the power off status, the circulator pump turns
off with a delay time of
P02 minutes after turning off status with thermo-regulator actuation (the turning off status is
corresponding to the off status of the compressor).
If the flow switch alarm is active in automatic reset, the pump is anyway on even if the compressor is off.
If you enable the operation of the unit from "DI2" digital input corresponding to the remote "on-off" the circulator will be
activated immediately for 2 minutes regardless of the internal thermoregulation of the unit (the activation of water recirculation in
the plant leads to the correct activation of the thermoregulation).
7.3.2 OPERATION UNDER THERMOREGULATOR CALL WITH PERIODIC ACTIVATION
The function is disabled if P17= 0 (default). If the pump is set to operate by thermos-regulator actuation ( P03 = 1 , default), it will
be activated periodically for a time period defined by the parameter P17 (in seconds) after a counting time set by the parameter
P16 (in minutes), activated when the pump is turned off for satisfied thermoregulation.
In the case of the activation of the flow switch alarms with automatic reset the pump is still ON even if the compressor is off.
The periodic function is interrupted also in the case of the intervention of the antifreeze thermo-regulator which constrains the
operation of the pump.
Please see paragraph 11.6 for changing the parameters.
7.3.3 OPERATION WITH ACTIVE ELECTRIC HEATER
The presence of the optional module “GI” is required for this function.
See paragraph 8.1.6
7.3.4 CONTINUOUS OPERATION
This operating mode is enabled if P03=0 , the pump is always turned on and it turns off only when the unit is not operating (OFF).
7.3.5 LINEAR ADJUSTMENT OF THE CIRCULATING PUMP–DOUBLE WATER Δ T
The analog output varies according to difference in temperature between water inlet and water outlet of the heat exchanger. The
controller is enabled setting
P12 = 1 and is defined by the following parameters:
•
P06 set difference in temperature between water inlet of modulating pump in heating mode
•
P07 : maximum speed of the modulating pump
•
P08 : minimum speed of the modulating pump
•
P09 : set Δ T inlet/outlet water of the modulating pump in cooling mode(°C)