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

Outdoor Sensor Kit (QAC34)
1
Sensor
2
Cable
3
4
5
6
7
8
9
10
1
2
3
4
5
90 80 70
80°
75°
70°
65°
60°
55°
50°
45°
40°
35°
30°
20° 15°
Fig. 29
Fig. 30
Fig. 31
12
M1
60 50 40
10° 5° 0° -5°
Outside Temp. (°C)
00
10
20
30
40
50
90
60
80
70
Curve 40
13.0 Connecting the Sensor &
Connecting
1. Ensure the electrical supply to the boiler is
isolated.
2. Hinge down the control box and unclip the terminal
block cover (Fig. 26). Pass the Sensor cable through
the gland nut in the boiler base panel.
3.Connect the Sensor cable to 4 & 5 of terminal M2
(Fig. 26).
Fig. 26
4.Leave sufficient slack in the cable to allow the
control box to be hinged fully open then tighten the
gland nut.
5. Refit and secure the cover.
30
Setting
1. Ensure that there is power to the boiler (though it is
20
not necessary for there to be any heating demand).
2. The central heating control knob should be turned
10
clockwise to the position which corresponds with the
desired curve as shown on the graph (Figs. 29 & 30).
00
-10° -15° -20°
3. Normally the display will show the current
temperature of the water in the boiler. As the knob is
turned the display will show the selected curve
(Fig. 30 & 31).
4. Explain to the user how to select a different
temperature curve.
Setting the Curve - boiler
Group 'E'
'4 '
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
appropriate curve.
NOTE: If a Baxi uSense smart thermostat is
connected to the boiler the curve must be set
using the uSense App. See the instructions
supplied with the uSense.
Note the boiler setting on the identifying label
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
removing the boiler casing or any other
disassembly. This label is required to enable
SAP/energy assessors to identify that a weather
compensation device is installed.
is selected (Fig. 29), at
7703237-01 (3/18)