Potterton Housewarmer 45, Инструкция по установке и обслуживанию, Страница: 22 / 45

6. Servicing & Replacement of Parts – page 22
Main Burner
(45 Model)
Gas
Valve
Securing
Bolts
(4 off)
Gas Pressure
Adjusting
Screw
B
B
4
5
0
2
6
B
Remove
Cap
Fig. 26
6.7 Gas Valve
1) Perform section 6.2.
2) Remove the screw securing the gas valve
electrical plug to the valve. Pull off the
plug and remove the gasket.
3) Remove the 4 bolts securing the burner
feed pipe to the base of the gas valve.
4) Re-assemble in reverse order. Fit the
gasket into the gas valve socket before
connecting the plug.
5) Light the boiler and allow to run for 10
minutes, and if necessary adjust the
burner setting pressure to give the heat
input required.
The adjusting screw will be accessible
after removal of the plastic cap on the
side of the valve. Snap the cap back into
place after adjusting.
6) Re-assemble in reverse order.
6.8 Overheat Thermostat
(See Fig. 27.)
1) Loosen the plastic screw and withdraw the overheat
sensor
.
6.11 User Control Box
See Fig. 27.
2) Disconnect the 2 electrical connectors at the thermostat
Note which way they fit.
3) Remove the locknut securing the thermostat to the
control box.
Important
This is a non-serviceable part and must be replaced
complete.
1) Disconnect the electrical connector at the control box.
4) Re-assemble in reverse order.
6.9 Control Thermostat
( See Fig. 27.)
1) Loosen the plastic screw and withdraw the control
sensor.
2) Disconnect the electrical connector at the control box.
3) Re-assemble in reverse order.
6.10 Electronic Control Box
(See Fig. 27.)
1) Disconnect all electrical connectors from the control
box.
2) Detach the control box from the gas fire mounting
bracket - 1 screw & 1 wingnut.
3) Set the timer switch on the new box to the same
position as the old one.
Note: Fig. 17 on Page 17 shows where all the electrical
connectors connect onto the box.
4) Re-assemble in reverse order.
2) Detach the user control box to the gas fire mounting
bracket - 2 screws.
3) Re-assemble in reverse order.
6.12 Heat Exchanger
(See Fig. 28.)
Servicing the Heat Exchanger.
1) Perform sections 6.1 & 6.2.
2) Remove the 2 screws securing the flue hood extension
and down draft diverter to the flue hood and remove
them both.
3) Using a short steel blade or 6" ruler clean between the
fins of the heat exchanger, removing any heavy
deposits.
4) Clean out the base of the fins and the combustion
chamber with a vacuum cleaner or brush.
5) Once the combustion chamber has been completely
cleaned then re-assembly can begin.
6) Re-assemble in reverse order.