Setting The Curve Boiler Group 'B - Baxi 7703233 Installation, Commissioning And User Instructions

Outdoor Sensor Kit (QAC34)
M2 low voltage
terminal strip
(already fitted)
Sensor Cable
Connect to 4 & 5
Fig. 16
80°
75°
70°
65°
60°
55°
50°
45°
40°
35°
30°
20° 15°
Fig. 17
7703237-01 (3/18)
1 2
3 4
5
6
7
8
9
10
Fig. 15
P
Central Heating
Temperature
Adjustment Buttons
90 80 70 60 50 40
10° 5° 0° -5°
Outside Temp. (°C)
7.0
Connecting
1. Ensure the electrical supply to the boiler is
isolated. Undo the securing screws and lift the case
front panel off.
2. Disengage the securing tab and hinge the control
box downwards. Undo the terminal block cover
securing screw and remove the cover.
3. Connect the Sensor cable to 4 & 5 on the M2 low
voltage 10 way terminal strip already fitted to the
boiler (Fig. 15) then refit the cover. There is no
polarity.
Setting
4. Ensure that there is power to the boiler.
R
5. The appropriate Central Heating temperature
button
curve as shown on the graph.
6. Normally the display will show the current
temperature of the water in the boiler (e.g. 41°C). As
the buttons are pressed (Fig. 16) the curve
identification code the will be shown, from
'9 '
For example, if Curve
an outside temperature of 0°C the boiler flow
temperature will be 80°C.
Consider the type of dwelling and discuss with the
user their requirements to determine the most
30
appropriate curve.
20
7. Explain to the user how to select a different
temperature curve.
Note the boiler setting on the identifying label
10
supplied. It must then be signed and affixed to the
front of the boiler or inside the control cover facia.
The label must be readily accessible without
00
removing the boiler casing or any other
-10° -15° -20°
disassembly. This label is required to enable
SAP/energy assessors to identify that a weather
compensation device is installed.
Connecting the Sensor &
Setting the Curve - boiler
Group 'B'
or is used to select the desired
.
'4 '
is selected (Fig. 17), at
' '
to
7