- 62 -
MAINTENANCE
6 - COMBUSTION PRODUCT CONDUITS
- Check the combustion product evacuation con-
duit and the air inlet conduit at least once a year
(airtightness of the parts that may be disassem-
bled - conduits not obstructed).
7 - DRAINING
- Cut the power supply,
- Turn off the gas cock,
- Turn off the heating flow/return valves (if they are
fitted),
- Open the drain valve (rep. 18).
Ensure that the air bleed (16) is open, as
soon as the pressure gauge indicates a
null pressure to allow air to enter the
boiler shell.
8 - SENSOR RESISTANCES
The resistance of the sensors must be measured
after they have been disconnected from the control
panel.
!
18
THI
-98
-0
16
Fig. 65
Resistance values of the sensors
Temperature
Heating outlet sensor
Boiler return sensor
Domestic hot water sensor
Flue gas sensor
0.00 °C
32624
10.00 °C
19897
15.00 °C
15711
20.00 °C
12493
25.00 °C
10000
30.00 °C
8056
40.00 °C
5324
50.00 °C
3599
60.00 °C
2483
70.00 °C
1748
80.00 °C
1252
90.00 °C
912
Summary of Contents for THI 5-25c
Page 62: ... 77 NOMENCLATURE THI 5 25 C ...
Page 65: ... 98 NOMENCLATURE CONTROL BOX ...
