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© JBG-HT (v.2.0)
INSTRUCTION MANUAL
– HEAT PUMP
6. SETTINGS AVAILABLE TO THE SERVICE TECHNICIAN
6.1. Weather control
It is possible to adjust the CH set point using the so-called heating curve. This involves setting four points (X,Y)
where you define the water temperature set point for a given ambient temperature. Between these points, the
temperature setpoint is interpolated using a linear function.
6.2. Mixer heating curve
When a heat pump user has an installation containing both radiators and underfloor heating, water of a different
temperature is needed to feed the radiators and of a different (lower) temperature to feed the underfloor system.
For this purpose, an algorithm for an additional heating curve is implanted, which determines the supply tem-
perature of the floor heating system depending on the ambient temperature. In this case, the CH heating curve
is the radiator supply temperature. Maintaining the correct temperature of the underfloor supply is ensured by
the mixing system (accessory), which mixes the outlet water from the exchanger with a higher temperature with
the return water from the underfloor, thus ensuring the set value of the underfloor supply.
6.3. Procedure for performing evaporator defrosting
There are three different defrost start conditions:
a. Evaporation temperature: defrosting starts when the evaporation temperature falls below the
set setpoint.
b. External exchanger temperature: defrosting starts when the temperature measured outside the
exchanger drops below the set setpoint.
c. Evaporation temperature and external exchanger temperature: both previous conditions must
be met.
In addition, the value of the Interval parameter is set, which determines the minimum operating time of the device
between two defrost procedures. When the conditions for the beginning of defrosting are met, the controller’s
internal clock starts, which will begin defrosting after the time set in the Delay parameter.
Summary of Contents for ZHHS-01-10K-R290-V5-M
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