Supplied By www.heating spares.co Tel. 0161 620 6677
22
100EC
Diagram 19
REPLACEMENT OF PARTS
To gain access to the boiler components, proceed as follows:
•
Isolate boiler from electrical supply.
•
Remove outer case, if necessary sealed chamber cover, combustion chamber cover and side covers, see
“
Routine cleaning and inspection
”.
•
Gently squeeze metal clip securing the control panel box, lift it up and hinge down.
To replace fan
•
Disconnect power supply and earth leads to fan.
•
Supporting fan, unscrew and remove two screws securing fan
to front of flue hood, see diagram 18.
•
Gently ease fan forwards and out of boiler.
•
Fit replacement fan in reverse order to removal making sure
that mounting plate engages correctly onto flue hood
Important:
Ensure that fan outlet is correctly fitted into flue
elbow at top of boiler.
To replace air pressure switch
•
Locate air pressure switch in upper left hand corner of sealed
chamber.
•
Pull off clear plastic tube from base of switch.
•
Remove electrical connections from switch.
•
Unscrew and remove two screws securing switch to upper panel and remove switch
– (or unclip air pressure switch from plastic holder – depends on type of switch used).
•
Fit electrical connections to replacement switch as follows:
One to the microswitch connection marked ‘NO 2’
One to the microswitch connection marked ‘COM 3’
•
Fit replacement switch in reverse order to removal.
Important:
Refit clear plastic tube as follows:
Tube from tapping point of flue hood to switch point ‘P 2 -’
To replace gas valve module
•
Locate gas valve module attached to side of gas valve, see diagram 19.
•
Unscrew screw (
a
) securing cover onto gas valve module.
•
Remove cover and disconnect multi-plug from module.
•
Disconnect ignition and flame sense leads from module and withdraw
module from gas valve.
•
Fit replacement module in reverse order to removal.
•
Reconnect ignition and flame sense leads, the connections are uniquely
sized to ensure correct replacement.
•
Refit cover ensuring all sealing grommets are correctly located in module
body.
To replace gas valve
•
Ensure that gas supply is turned off at gas cock.
•
Unscrew screw (
a
) and remove gas valve module.
•
Undo nuts (
A
) and (
B
) securing gas supply pipe between burner and gas valve and remove pipe, taking care not to
lose sealing washers, see diagram 19.
•
Remove gas inlet connection to boiler.
•
Unscrew 2 screws securing gas valve to boiler bottom.
•
Remove gas valve by lifting upwards and out of boiler.
•
Fit replacement gas valve in reverse order to removal.
•
Check for gas-tightness.
To replace burner
•
Remove burner as described in
‘Cleaning the burner’
.
•
Fit replacement burner in reverse order to removal.
•
Check if the injectors are correct.
Diagram 18
Summary of Contents for 100EC
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