Chappee 1.65 FF HTE - Page 20

20
Turn the control box downward to access terminal board M2 used for the electrical connections 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.
The SIEMENS model QAA73 room 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 room temperature regulator for the user parameter
programming procedure.
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”.
Exchangers pressure drop (mH
2
O)
WATER FLOW RATE (l/h)
Graph 1
0310_0112
- Exchangers pressure drop
l/h
1.45 FF HTE 1000
1.55 FF HTE 1000
1.65 FF HTE 1200
The minimum ga boiler water flow, with at least 1 - 1,5 bar, must be as follow:
13.2 Description of the electri-
cal connections to the
boiler
13.3 Connecting the QAA73
room temperature regula-
tor.