Baxi LUNA HT 1.450 Gebrauchsanleitung Für Den Verbraucher Und Den Installateur Seite 80

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13.2 Description of the electri-
cal connections to the boiler
13.3 Connecting the QAA73
temperature regulator.
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- Exchangers pressure drop
Graph 4
The minimum ga boiler water flow, with at least 1 - 1,5 bar, must be as follow:
LUNA HT 1.450
LUNA HT 1.550
LUNA HT 1.650
Turn the control box downward to access terminal boards M1 and M2 used for the electrical connec-
tions by removing the two protective covers (see figure 9).
Terminals 1-2: connection of SIEMENS model QAA73 temperature regulator supplied as accessory.
Connection polarity is irrelevant.
The jumper fitted across the "TA" terminals 3-4 must be removed.
Read the instructions supplied with this accessory for correct installation and programming proce-
dures.
Terminals 3-4: "TA" room temperature thermostat connection. Thermostats with integral accele-
rator resistor must no be used. Check that there is no voltage across the ends of the two thermostat
connection wires.
Terminals 5-6: "TP" floor temperature thermostat connection (commercially available device). Check
that there is no voltage across the ends of the two thermostat connection wires.
Terminals 7-8: connection of SIEMENS model QAC34 outdoor temperature probe supplied as
accessory.
Read the instructions supplied with this accessory for correct installation procedures.
Terminals 9-10: connection of domestic hot water precedence temperature sensor supplied as acces-
sory for connecting heating-only boilers to an external water heater.
Terminals a-b (230V AC; 50 Hz; 0.5 A max; cos
pump.
See instructions in the "connecting a zone system" section.
The SIEMENS model QAA73 temperature regulator (optional accessory) must be connected to
terminals 1-2 of terminal board M2 in figure 9.
The jumper 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 temperature regulator for the user parameter pro-
gramming procedure.
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WATER FLOW RATE (l/h)
l/h
1000
1000
1200
> 0.8): electricity supply for a zone valve /
φ
80 80