Hamworthy Sherborne Series, Инструкция по установке, пусконаладке и обслуживанию

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HAMWORTHY HEATING LTD
SHERBORNE 500001103/E
13.4 Re assemble the fan/transition/burner
assembly using new gaskets where necessary, and
refit in reverse order.
Test all gas joints broken or
disturbed for soundness before firing . Re-light
the boiler, check and adjust the combustion as
described in
Section 11.4.
Check thermostat settings and adjust if required.
Re-fit the boiler cover and tidy floor around boiler as
necessary.
14.0 REPLACEMENT OF FAILED COMPONENTS
There are a number of components listed below
which can be replaced simply and quickly by
following the given procedure. In each case the
operation of replaced components must be checked
by carrying out the appropriate part of the
commissioning procedure. See
Section 11.0:
COMMISSIONING & TESTING.
NOTE: Isolate all electrical supplies to the boiler
and turn off the gas supply before commencing
any servicing or component exchange
procedure.
To access the components, remove the screw on
the top of the outer cover and pull the cover away
from the wall. The cover is located on the wall frame
by two ball studs.
14.1 Hot Surface Igniter and Flame Probe
Assembly. Part Nos. 563801011 & 533805010
Note :- the igniter and probe ceramics are very
fragile.
Reference to Figure 11.5 shows position of
the igniter and flame probe assembly. Unplug the
igniter from the harness and remove the single
socket cap head screw securing the igniter to the
burner flange. Carefully withdraw the igniter, renew
as required and generally remove any loose sooty
deposits, clean as required. Replace igniter and
secure socket cap head screw holding the igniter to
the burner flange. Disconnect the flame sensing
probe connection, remove the single socket cap
head screw securing the probe to the burner flange
and carefully withdraw the probe. Renew as
required and generally remove any loose sooty
deposits, clean as required.
Note – do not remove both securing screws as the
separate flange and Mica sight glass will become
detached.
14.2 Control Thermostat Renewal
The thermostat consists of a potentiometer and
remote sensor
. Part nos. 563901312 & 533901378 .
To replace the thermostat or sensor, the following
procedure must be followed.
NOTE! Record existing temperature setting of
thermostat for reference before removal. Remove
the clip securing the thermostat phials in the pocket
and carefully remove thermostat phials. Remove the
screw securing the fascia panel to the controls
housing and carefully lower the front panel and hang
on the two hooks provided on the control panel
body. Disconnect the sensor cable plug from the
PCB and remove the sensor. Prise out the indicator
disc from the centre of the control knob and loosen
the collet nut securing the knob to the shaft. Pull off
the control knob and undo the securing nut on the
central spindle. Disconnect the potentiometer cable
plug from the PCB and remove the potentiometer.
Replace components in reverse order ensuring that
the sensor is correctly located within the pocket. Do
not force the bulb into the pocket. When replacing
the potentiometer knob, rotate the shaft fully
clockwise and fit the tightening the collet nut. Fit the
indicator disc aligning the mark with ‘max’ on the
graduation scale. Refit and secure the fascia panel.
Run the boiler and turn the thermostat up and down
to check for correct operation. Set thermostat to
previously noted setting.
14.3 Temperature Limiter (Limit Stat) Renewal.
Part Nos. 533901179
Remove the 'push on' spade connections from the
temperature limiter body noting position of coloured
cables. Remove plastic cover (if fitted) and unscrew
holding nut to detach temperature limiter from
housing. Remove the bulb from the heat exchanger
pocket and check the operation of the device by
carefully applying a heat source to the bulb. Set
temperature limiter to 100
°
C and re-assemble
temperature limiter ensuring correct cable notation.
Refer to thermostat diagram if terminal identification
differs from those given in Figure 9.1 (Boiler
schematic wiring diagrams).
14.4 Main Gas Valve / Venturi
Part No. 533903033
Note: the gas valve and venturi are supplied as a
matched and factory set assembly and must not be
tampered with or adjusted.
1) To replace the gas valve/venturi it is preferable to
remove the complete fan assembly.
2) Unplug the connectors from the fan (two) and the
gas valve. Remove the 4xM4 screws securing the
die-cast gas valve inlet elbow to the gas valve taking
care not to loose the ‘O’ ring.
3) Disconnect the pressure feedback tube from the
gas valve. Remove the 4xM5 screws/nuts securing
the fan/venturi/gas valve assembly to the transition
duct.
Note the use of a spacer on the screw/nut
nearest to the heat exchanger casting. Withdraw the
assembly from the air inlet duct.
4) Remove the 2xM5 screws securing the venturi/
gas valve assembly to the fan noting the cork
sealing gasket.
5) Remove the copper feedback connecting elbow
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