24
INSTRUCTIONS PERTAINING TO THE INSTALLER
926.772.1 - GB/IE
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”.
QAA73: 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.
14.4 CONNECTING THE QAA73 TEMPERATURE REGULATOR
- fault messages
In the event of fault, the display panel on the QAA73 shows the flashing symbol . Press the information key
( ) to display the error code and a description of the fault (see Fault warning tables on paragraph 3.9).
Line no. Parameter
Range
Default value
70
HC1 curve
Selection of central heating circuit temperature curve “kt”
2.5…40
15
72
HC1 max. output
Central heating system maximum output temperature
25…85
85
74
Type of building
Light, Heavy
Light
75
Room compensation
Activation/deactivation of the influence of the room temperature. If it is deactivated, the outdoor
temperature sensor must be installed.
on HC1
on HC2
on HC1+HC2
nil
On HC1
77
Automatic adaptation of the temperature curve “kt” in relation to the room temperature.
On - off
On
78
Opt Start Max
Maximum time the boiler is switched on ahead of the timed program to optimise the temperature
in the premises.
0…360 min
0
79
Opt Stop Max
Maximum time the boiler is switched off ahead of the timed program to optimise the temperature
in the premises.
0…360 min
0
80
HC2 curve
2.5…40
—.- = not active
—.-
90
DHW Red Setp
Minimum temperature of the domestic hot water
10 or 35…58
10
91
DHW program
Selection of the type of timed program for domestic hot water.
24 h/day
= always on
PROG HC-1h
= as HC1 central heating program less one hour
PROG HC
= as central heating program
PROG DHW
= specific domestic hot water program (see also program lines 30-36)
24 h/day
TSP HC-1h
TSP HC
TSP DHW
24 h/day
Here follows a list of the most commonly used parameters:
