Fan; Case Seal; Recommission; Fault Finding - Potterton Profile 30e Installation And Servicing Instructions

SERVICING INSTRUCTIONS - Page 23
C. Refit the screw securing the gas control valve to the
support bracket.
D. Reconnect electrode lead to electrode.
E. Plug gas control valve supply leads into control box.
F. Reconnect gas supply at gas service cock and turn on
gas.
G. Refit the combustion chamber front panel.
6.

FAN

A. Carefully clean any deposits from around the fan motor
and its supports.
B. Very gently clean the fan impellor taking care not to
damage the aluminium impellor or dislodge its balance
weights.
C. Replace the fan and its mounting plate. Ensure that the
securing screws are fully tightened as an air tight seal
must be obtained between the fan assembly and the main
boiler casing.
D. Reconnect the fan supply leads (polarity is not important).
7.

CASE SEAL

Check the case door seal. Replace if damaged. The seal is
simply pressed into the channel around the door.
8.

RECOMMISSION

Follow the full commissioning procedure as detailed in the
COMMISSIONING section of these instructions page 18.
9. OTHER BOILER MOUNTED UNITS
No further servicing is required on any other boiler mounted
units. Repair is by replacement.

10. FAULT FINDING

Refer to Fault Finding Chart FIG. 31 and Wiring Diagram
FIGS. 27, 28.
REMOVAL/REPLACEMENT OF BOILER
MOUNTED UNITS
GAS CONTROL VALVE
This operation is most easily carried out by first removing the burner
and gas control valve assembly as follows:—
1. Switch off the external electricity supply by disconnecting the
plug at the socket or switching off the external isolating switch.
2. Remove controls cover, case door and combustion chamber
front panel as described in 1. 'Preparing the Boiler for
Servicing', operations A, B and C.
3. Remove the burner and gas control assembly as described in
1. 'Preparing the Boiler for Servicing', operations I, J, K, L and
M.
4. Disconnect the electrical supply wires from the gas control
valve noting their position. Refer to FIGS. 27, 28.
5. Unscrew the union connecting the pilot supply pipe to the gas
control valve.
6. Separate the gas control valve from the flanges at the inlet and
outlet ports by removing the securing screws.
Supplied By www.heating spares.co Tel. 0161 620 6677
NOTE: A spacer is used between the valve outlet and the
burner flange, requiring the use of two seals at this point. See
FIG. 26.
7. Use new seals on reassembly.
8. Replacement is the reverse of removal.
9. Follow the full commissioning procedure as detailed in the
COMMISSIONING section of these instructions. Page 18.
FAN
1. Switch off the external electricity supply by disconnecting the
plug at the socket or switching off the external isolating switch.
2. Remove controls cover and case door as described in 1.
'Preparing the Boiler for Servicing', operations A and B.
3. Disconnect the fan supply leads from the connnector adjacent
to the fan.
4. Remove the screws securing the fan to the mounting plate and
remove fan.
5. Replacement is the reverse of removal.
6. Following the full commissioning procedure as detailed in the
COMMISSIONING section of these instructions. Page 18.
MAIN BURNER
1. Switch off the external electricity supply by disconnecting the
plug at the socket or switching off the external isolating switch.
2. Remove controls cover, case door and combustion chamber
front panel as described in 1 .'Preparing the Boiler for
Servicing', operations A, B and C.
3. Remove the burner and gas control assembly as described in 1
.'Preparing the Boiler for Servicing', operations I, J, K, L and M.
4. Unscrew the union nuts connecting the pilot supply pipe to the
pilot and gas control valve. Take care not to damage the
electrode and be careful that the pilot injector does not fall out
during this operation.
Remove sealing grommet and withdraw the pilot tube through
the hole in the burner mounting flange.
5. Separate the burner from the gas control valve at the flanged
connection by removing the four securing screws.
NOTE: A spacer is used between the valve outlet and the
burner flange, requiring the use of two seals at this point. See
FIG. 26.
6. Unscrew the pilot, main burner injector and pressure test nipple
from the burner.
7. Use new sealing gaskets on reassembly.
8. Replacement is the reverse of removal.
9. Follow the full commissioning procedure as detailed in the
COMMISSIONING section of these instructions. Page 18.
PILOT/IGNITION ELECTRODE
1. Switch off the external electricity supply by disconnecting the
plug at the socket or switching off the external isolating switch.
2. Remove controls cover, case door and combustion