36
Response FF80
- Installation
SERVICING
SER
VICING
1.
Isolate the electricity supply at the switched spur.
N.B.
Turning the boiler 'ON / OFF' switch does not isolate the permanent live supply to the boiler.
2.
Turn off the gas supply.
Note.
In order to assist fault finding, the printed circuit boards are fitted with indicator lights . Full details are found in the Fault-
Finding section.
IMPORTANT.
When work is complete the sealing panel must be correctly fitted, ensuring that a good seal is made.
THE BOILER MUST NOT BE OPERATED IF THE SEALING PANEL IS NOT FITTED.
WHEN REPLACING ANY
COMPONENT:
55 GENERAL
REPLACEMENT OF COMPONENTS
54 BURNER PRESSURE CHECK
After any servicing, reference should be made to:
z
Tables 2 and 3, Page 3 (or the data plate), which quote
details of the burner pressures for the boiler models.
z
Frame 45 'Gas rate.'
52 INLET FILTER CLEANING
53 RE-ASSEMBLY
Re-assemble the boiler in the following order:
1.
Refit the burner, renewing any damaged or deteriorating
sealing gaskets.
2.
Reconnect the 2 ignition leads and the detection lead.
3.
Reconnect the pressure sensing pipe to the burner.
4.
Ensure that the fan 'O' ring seal is in place then refit the
fan, engaging it in the bayonet fixing and locating it in the
retaining bracket.
5.
Reconnect the pressure sensing pipe to the fan and secure
both pipes to the manifold block with the clamping plate.
6.
Reconnect the fan electrical harness.
7.
Refit the boiler sealing panel.
IMPORTANT.
Ensure the boiler sealing panel is correctly
fitted and that a good seal is made.
8.
Refit the boiler front panel.
9.
Turn on the gas supply at the gas service cock.
10.
Reconnect the electrical supply.
The filter comprises a gauze disc in a synthetic rubber carrier
ring. It is secured at the front (outlet) of the cold water
isolating valve by means of the union connection between the
valve and the boiler inlet pipe work. To access the filter,
proceed as follows:
1.
Close the cold water inlet valve below the boiler.
Ensure the markings are as shown.
2.
Open a hot tap to relieve the pressure in the expansion
vessel and pipework.
3.
Drain using the valve nipple.
4.
Undo the union connection referred to above, and remove
the filter disc.
5.
Clean (or renew) the filter disc. Re-assemble in reverse
order.
Note that the pressure is set by the gas valve according to
fan speed, which in turn is controlled by reference to boiler
temperature and mode (CH/HW) thus the burner pressure
should be checked at maximum demand for CH or HW as
appropriate.
Frame 82 deals with possible causes of incorrect burner
pressure.
