Recommended Servicing - Potterton iHE 100/300 Installation And Servicing Instructions

SERVICING
SERVICING
Health and Safety Statement :
This Boiler contains no asbestos.
In all cases, before work commences turn
off the Mains Electricity and Gas Supply.
R S
OUTINE ERVICE
To ensure continued effi cient operation of the Boiler
it is recommended that it is checked and serviced at
regular intervals.
The frequency of servicing will depend upon the
particular installation and usage but in every case
a maximum of twelve months should be allowed
between service inspections.
It is law that any service work should be carried
out by Registered personnel.
1. Clean the burner and check the combustion
chamber.
2. Check condition of ignition spark and sensing
electrodes.
3. Check the air duct and fl ue seals.
4. Check condensate syphon and pipework for
leaks.
5. Check the combustion CO, CO
Follow the procedures given in Changing Components
for parts removal in addition to the following notes.
B & C
URNER OMBUSTION
To view the burner and the inside of the heat
exchanger it is suggested you remove the front of
the heat exchanger complete with the fan and gas
valve:
• Remove door and swing aside the controls
Panel.
• Disconnect the gas cock fl ange from the gas
valve.
• Unplug fan electrical connectors.
• Remove Air tube from the main air stack or by
removing the spring clip (Fig 6.1) and pulling off
the fl exible hose. Do not remove the two black
screws holding the air valve in place.
• Remove the connection plug and earth lead to
the spark generator.
• Pull off the earth lead connection on the
gas valve and heat exchanger.
• Undo the four nuts holding the heat exchanger
front and pull the whole assembly forwards.
• Replace silicone door seal if there are any
signs of damage and in any case every 2 years.
• Heat exchanger deposits can be removed using
a non-metalic brush and vacuum cleaner.
• Assembly is the reverse.
iHE
and gas rate.
2
C
HAMBER
S E
PARK LECTRODE OR
• Turn off the Boiler.
• Pull off the Lead(s).
• Undo the two screws retaining the electrode
assembly and carefully withdraw.
• The spark gap should be 3.0 mm ± 0.5. There is
a useful guage built into the burner door (Fig 6.1)
• Assembly is the reverse, ensure the gasket
is correctly placed.
Spark gBSpark gap guage
A D & F S
IR UCT LUE EALS
A visual inspection should establish there are no leaks
around any of the seals, including the fl exible Air Duct
to the Venturi. Replace if there is any doubt as to the
integrity of the seals.
C P
ONDENSATE IPEWORK
Inspect all joints in the pipework for leaks, repair/re-
place parts if any defects found.
C S
ONDENSATE YPHON
The lower bowl of the Syphon can be unscrewed,
examined and cleaned. Check its connection to the
Heat Exchanger and pipework for leaks.
G R & C
AS ATE OMBUSTION
See the Datatable on the inside of the cover for the
correct values. A Combustion sample point is provided
on the individual fl ue outlet elbows.
To check, re-establish gas and electricity and then
run the Boiler for at least 5 minutes. If adjustment is
required remove the cover over the Throttle screw
and turn anti-clockwise to increase CO
decrease.(Fig. 6.2) Allow at least a minute between
adjustments to obtain stable readings. The Gas Rate
will be correct when the CO and CO
specifi cation.
Throttle Screw
Adjustment
Air hose securing
clip
27
S E
ENSE LECTRODE
Fig 6.1
, clockwise to
2
fi gures are to
2
Fig 6.2