Potterton Sirius WH 50-60-70 Installation, Operation & Maintenance Manual page 27

14.4 connecting tHe Qaa73 temperature regulator
The SIEMENS model QAA73 room temperature regulator, if required (optional extra) must be connected to
terminals 1-2 of terminal board M2 in figure 13.
The link across terminals 3-4, provided for connection of a room temperature thermostat, must be removed.
The settings of the domestic hot water temperature and domestic hot water production schedule must be
made using this device.
The timed program of the central heating circuit must be set on the QAA73 if there is a single zone, or in relation
to the zone controlled by the QAA73 device.
The timed program for the central heating circuit of the other zones can be set directly on the boiler control
panel.
See the instructions provided with the QAA73 room temperature regulator for the user parameter programming
procedure.
IMportant: For systems divided into zones, parameter 80 "HC2 curve", which can be set on the QAA73
temperature regulator, must be set as _ _ . _ "not active".
Qaa7: parameters which can be set by the installation engineer (service)
By pressing the two PROG buttons together for at least three seconds it is possible to access the list of pa-
rameters that the installer can display and/or set.
Press either of these buttons to change the parameter to display or change.
Press the [+] or [-] key to change the value displayed.
Press either of the PROG buttons again to save the change.
Press the information button (i) to quit programming.
InstructIons pErtaInInG to thE InstaLLEr 91.7.1 - GB/IE
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