Baxi LUNA HT 1.450 Installers And Users Instructions page 81

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IMPORTANT: For systems divided into zones, parameter 80 "HC2 gradient", 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 parameters 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.
Here follows a list of the most commonly used parameters:
Parameter
Line no.
HC1 gradient
70
Selection of central heating circuit temperature curve "kt"
HC1 max. output
72
Central heating system maximum output temperature
Type of building
74
Room compensation
75
Activation/deactivation of the influence of the room temperature.
If it is deactivated, the outdoor temperature sensor must be
installed.
Automatic adaptation of the temperature curve "kt" in relation
77
to the room temperature.
Opt Start Max
78
Maximum time the boiler is switched on ahead of the timed
program to optimise the temperature in the premises.
Opt Stop Max
79
Maximum time the boiler is switched off ahead of the timed
program to optimise the temperature in the premises.
HC2 gradient
80
DHW Red Setp
90
Minimum temperature of the domestic domestic hot water
91 DHW program
Selection of the type of timed program for domestic hot water.
24 h/day
PROG HC-1h
PROG HC
PROG ACS
- fault messages
In the event of fault, the display panel on the QAA73 shows the flashing symbol . Press the infor-
mation key ( ) to display the error code and a description of the fault (see Fault warning tables on
paragraph 3.9).
= always on
= as HC1 central heating program
less one hour
= as central heating program
= specific domestic hot water
program (see also program lines 30-36)
81 81
Range
Default value
2.5...40
15
25...85
85
Light, Heavy
Light
on HC1
on HC2
On HC1
on HC1+HC2
nil
On - off
On
0...360 min
0
0...360 min
0
2.5...40
—.-
—.- = not active
10 or 35...58
10
24 h/day
24 h/day
TSP HC-1h
TSP HC
TSP DHW