The Slope Boiler Group 'D - Baxi 7703233 Installation, Commissioning And User Instructions

Outdoor Sensor Kit (QAC34)
Fig. 22
80°
75°
70°
65°
Slope 30
60°
55°
50°
45°
40°
35°
30°
25°
20°
20° 15°
Fig. 24
OFF MAX
OFF MAX
Fig. 25
7703237-01 (3/18)
R Bk Br
W Br Bl
Gn Bk R
Gy W Vt
1 2 3 4 5 1 2 3 4 5 6 7 1 2
X12 X11 X10 X5
J X14 X7
X8
X9
X13
On
Off
3 2 1
Sensor
Fig. 23
Cable
Slope 20
Slope 12
Slope 5
10° 5°
OFF MAX
When Sensor
connected icon
RESET
OFF MAX OFF
Knob Knob
position for position for
slope 5 slope 20
TIMER
Bl G/Y
Br
Bk
Bl
Gy Br
1 1 2 3
X3 X2
X1 MAINS
X6 F2
X4
N L
0.5A
230V - 50Hz
0° -5°
displayed
MAX OFF MAX
Knob
position for
slope 30
12.0 Connecting the Sensor &
Setting the Slope - boiler
Group 'D'
Connecting
1. Ensure the electrical supply to the boiler is
isolated.
2. Fully undo the two screws retaining the electrical
cover at the bottom of the front panel. Remove the
cover (Fig. 22).
3. Connect the Sensor cable to the grey T-OUT
connector (X14 Fig. 23). There is no polarity.
Refit and secure the cover.
Setting
4. Ensure that there is power to the boiler (though it is
not necessary for there to be any heating demand).
5. The Central Heating Control Knob should be
turned clockwise until the value which corresponds
with the desired slope (as shown on the graph - Fig.
24) is displayed (Fig. 25).
NOTE: If a Baxi uSense smart thermostat is
connected to the boiler the slope must be set
using the uSense App. The boiler display will not
show the slope but will still be active.
6. Normally the display will show the current
temperature of the water in the boiler (e.g. 41°C). As
the knob is turned the display will show the selected
slope (Figs. 24 & 25).
'12'
For example, if Slope
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.
7. Explain to the user how to select a different
temperature slope.
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. 24), at
11