MAXA i-MAX 0475 - In Joint Operation (Band II); Substitution Operation

i-MAX Industrial inverter air/water heat pump with axial fans
22
The activation priorities are defined by the parameters r14, r20, r23 and r24.
The operation becomes normal if the temperature increases above the value given by r22+1,0°C.
Note: In the joint operation, the temperature of the boiler is controlled by the water temperature remote sensor of the plant
circuit (if enabled), particularly if the temperature measured by the remote sensor is less than the setpoint Hea, the boiler will be
activated, and then will be deactivated when the measured temperature by the remote sensor is greater than setpoint Hea.
The boiler will be managed by the outlet temperature sensor of the heat pump if the water plant circuit remote sensor is not
enabled.
9.10.3 IN JOINT OPERATION (BAND II)
If the outdoor air temperature is included between r28 and r08, the compressor will operate in synergy with the auxiliary electric
heaters.
In this operation area, the devices will start operation in the following working order: at first the boiler will start the operation,
then the heat pump and the plant circuit auxiliary electric heaters will start operation after a period of time given by r12 (in
minutes) and after r16 (in minutes) the DHW auxiliary electric heaters will start operation.
The activation priorities are defined by the following parameters r14, r20, r23 and r24.
The operation becomes normal if the temperature increases above the value of r28+1,0°C.
Note: In the joint operation, the temperature of the boiler is adjusted by the water temperature remote sensor of the plant circuit
(if enabled), particularly if the temperature measured by this remote sensor is less than the setpoint Hea, the boiler will be
activated, and then will be deactivated when the measured temperature by the remote sensor is greater than setpoint Hea.
The boiler will be managed by the discharge temperature sensor of the heat pump if the water plant circuit remote sensor is not
active.
9.10.4 SUBSTITUTION OPERATION
If the outdoor air temperature decreases below r08, the compressor operation will be inhibited.
- If the auxiliary system is composed of the plant circuit and/or the DHW electric heaters, they will be activated in substitution to
the compressor with a duration defined by r12 (minutes) for the plant circuit side and by
r16 (minutes) for the domestic hot
water side.
During the substitution operation, instead it is not necessary to enable the auxiliary electric heaters with the parameter r10 or
r15, because the auxiliary electric heaters operate in substitution (and not as auxiliary heating systems) to the heat pump
(therefore it is enough to select the type of utilization of the auxiliary electric heaters by setting only the parameter r24).
- If the auxiliary system is a boiler with its proper circulator (r32 = 1 or 3).
The circulator of the heat pump will be off, the boiler will be enabled after P01 (default 30 seconds).
Note: When the defrosting protection occurs on the water side, the utilization pump will be activated (or remains on).
- If the in substitution auxiliary system is a boiler with its proper temperature control (r32 = 2 or 3).
The boiler will be enabled independently than thermoregulation of the heat pump.
- If the in substitution auxiliary system is a boiler without circulator (r32 = 0 or 2).
The circulator of the heat pump will be active when the boiler is enabled.
The compressor will be enabled again if the temperature increases above the value of r08+ r09 (°C) (by default r09=1,0°C)