Hamworthy QAA73.210, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD QAA73.210
Programmable Room Unit
500001305/B
4.5 Cooling Circuit (COOL):
Comfort room temperature setpoint (COMFR)
In comfort operation, the comfort room temperature setpoint is maintained.
The comfort room temperature setpoint is adjusted with the buttons for the comfort temperature, which are located
on the controller front for direct access by the user.
When a button is pressed, the current room temperature setpoint is displayed and – when pressed further –
readjusted.
Reduced room temperature setpont (ECONM)
The reduced room temperature setpoint ensures a higher room temperature during the night, for instance, to save
energy.
4.6 Domestic Hot Water (DHW)
Nominal DHW temperature setpoint (COMFR)
During nominal operation, the nominal d.h.w. setpoint is maintained. It is possible to use 2 different d.h.w.
temperature setpoints.
The temperature setpoint during normal d.h.w. operation will be changed.
Reduced DHW temperature setpoint (ECONM)
Reduction of the d.h.w. temperatures outside main occupancy times. The time switch integrated in the room unit
automatically switches between main and secondary occupancy times.
D.h.w. is at a high temperature level only if required. This saves energy by reducing the temperature when not in
use.
The temperature setpoint during reduced d.h.w. operation will be changed
Maximum DHW temperature
setpoint (HW MX):
Function for limiting the maximum settable nominal setpoint of the d.h.w. temperature.
Note: A d.h.w. setpoint maximum (TBWmax) of a BMU transmitted via OpenTherm is given priority and replaces
that of the room unit (setting 130).
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