Baxi LUNA3 SYSTEM HT 1.180 MP Installers And Users Instructions page 55

tM
°C
Graph 1
b) with Qaa73 temperature regulator:
The temperature curve "kt" must be selected by setting parameter 70 "HC1 gradient" of the QAA73 temperature control
device as described in section 15.2 "QAA73: parameters which can be set by the installation (service) engineer".
See graph 3 for selecting the curve referred to a room temperature of 20°C.
The curve is shifted automatically on the basis of the room temperature set using the QAA73 climate control.
If the system is divided into zones, the temperature curve "kt" relating to the part of the system not controlled by the QAA73
must be selected by setting parameter H532 as described in section 17 "setting the boiler parameters".
IMportant:
For systems divided into zones, parameter 80 "HC2 gradient", which can be set on the QAA73 tempe-
rature regulator, must be set as _ _ . _ "not active" (see section 15.2).
Graph 3
c) with aGu2.500 for control of a low temperature system:
Refer to the instructions provided with the AGU2.500 accessories for connection and control of a low temperature zone.
InstructIons pertaInInG to the InstaLLer
tM
°C
te °C
tM = Flow temperature
te = Composite outside temperature
sth = Kt Curve
tM
°C
tM = Flow temperature
te = Composite outside temperature
55
te °C
Graph 2
te °C
925.916.2 - GB