RDZ UMHPI, User Manual

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UMHPI
Industrial inverter air/water heat pumps with axial fans
29
The below Table (6) shows the behavior of DHW and plant auxiliary electric heaters in all cases when the unit is operating.
TABLE 6. OPERATION OF AUXILIARY ELECTRIC HEATERS
N° MODE OPERATION AUXILIARY ELECTRIC HEATER OF PLANT AUXILIARY ELECTRIC HEATER OF DHW
1 HEAT+SAN HEAT It works as indicated in the 1, 2, 3 and 4.
During "HEAT+SAN" operation, the DHW
thermoregulation by default will have priority
over that of the plant side, so if the
thermoregulation is required, the unit will start
the "DHW" mode operation and the auxiliary
electric heater of DHW side behaves as described
in the TABLES 1 , 2, 3 and 4.
2 HEAT+SAN SAN
Only if the following 3 conditions are fulfilled:
- Output for auxiliary electric heater of plant side is
configured;
-r24=1/3;
- the remote sensor of water plant temperature
is installed and configured (see paragraph 0 );
the auxiliary electric heater of the plant is available
in the following cases:
- after r12 minutes from the beginning of its
counting when activated previously in “HEAT”
operation mode (see line N°1);
- if not already activated its counting in the
previous "HEAT" operation mode, after r12
minutes from the thermoregulation requirement.
In DHW mode, if the remote sensor is not set, the
auxiliary electric heater of the plant will be disabled
or its eventual counting will be stopped.
If the "on-off remote contact" turns to the open
state, the auxiliary electric heater of the plant will
turned off.
It works as indicated in the TABLE 1,2,3 and 4.
3 COOL+SAN SAN Not available. It works as indicated in the TABLE 5.
4 COOL+SAN COOL Not available.
Not available.
8.3.6 AUXILIARY SYSTEMS OFFSET MANAGEMENT
During the joint operation or in substitution operation, for boiler and/or auxiliary electric heaters (depending on your resources
and on the selected priorities) it is possible to determine a setpoint in heating or DHW production greater than the one of the heat
pump. This is achieved by setting a temperature offset for the set point:
- r29 : Temperature offset for boiler and electric heaters of the plant for the first set point ( G02 );
- r30 : Temperature offset for boiler and electric heaters of the plant for second set point ( G05 );
- r31 : Temperature offset for boiler and DHW electric heaters ( G03 ).
In this way, the heat pump will stop when achieving the setpoint ( G02 , G03 , G05 ) and the temperature difference can be
supplemented by the boiler and/or electric heaters according to the selected temperature offset.
8.4 DOUBLE SET-POINT
The double set-point function introduces a second working set-point of the plant side (in both cooling and heating modes).
You can configure in the "GI" module a digital input which provides consent for the transition from the first to the second set-point
or vice versa.
8.4.1 SETTINGS
H82 is the parameter used for to set the double set-point function (from service menu).
H82 OPERATION
1 Classic mode
2 Double set-point active in the summer operation
3 Double set-point active in the winter operation
4 Double set-point active in both summer and winter operation