Hamworthy Warmwell 120, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD WARMWELL 500001091/F
assembly and relevant components and part
numbers. Renew components as required and
generally remove any loose sooty deposits and
clean as required. Ensure positions of components
are as recommended in Figure 14.1 (p37).
14.2 Pressure Switch
Two pressure switches are used to monitor the
induced draught fan at Hi/Lo operation. The
pressure switches are mounted on the exhaust fan
control panel mounted on the upper casing, and are
identified - HI/LO.
Remove the top casing front panel secured by
spring latches. Remove the pressure switch cover,
note and disconnect the electrical connections –
See Figure 11.5 (p28). Note and remove the flexible
hoses from the switch, undo the 2 screws attaching
the switch to the control panel and withdraw the
switch.
Replace the switch in the reverse order and set to
the required setting - see Figure 2.2 (p4). Seal the
adjuster once set.
14.3 Control Thermostat Renewal.
The thermostat consists of a potentiometer and
remote sensor. Part Nos. 563901258 & 533901350
NOTE! Record existing temperature setting of
thermostat for reference before removal.
Prise the top panel from the side panels (secured by
spring latches) and lift boiler top panel to reveal
thermostat pocket. Carefully remove thermostat
phials. Drop down fascia to reveal controls section.
Disconnect the sensor cable plug (CN23) 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 (CN14) 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 anti-clockwise and fit the knob
with the locating pip aligned with the 20°C
graduation. Fit the indicator disc aligning the mark
with the graduation. Close fascia and re-fit top panel
correctly.
Run the boiler and turn the thermostat up and down
and ‘on’ and ‘off’ to check for correct operation. Set
thermostat to previously noted setting.
14.4 Temperature Limiter (Limit Stat) Renewal
Part No. 339011044 or 533901179
The temperature limiter renewal procedure follows
(secured by 4 screws). This will give access to the
transition duct cover. Remove nuts to gain access to
the flueways (insulation jacket should be carefully
prised open to reveal duct).
2) The boiler flueways are now exposed and can
be brushed through diagonally in both directions to
remove deposits from the cast iron finned surfaces.
Check secondary heat exchanger surfaces and
wash if required. Re-assemble the boiler in the
reverse order to that shown above. Ensure a new
seal is fitted to the cover to ensure a gas tight seal.
Before replacing the burner bar assembly, lift out
both halves of the radiant reflector and brush off any
dust and fallen deposits accumulated on it. Also
clean the area under the reflector before re-placing
it in its correct location. Re-assemble the burner bar
assembly, ensuring correct location on the rear
support bracket.
3) Check all gas connections are tightened
securely before opening the gas service cock.
Switch on the electricity supply and re-light the
boiler following the correct procedure on the inside
of the door.
4) Take gas pressure and exhaust gas readings
and compare with Figure 2.2 (p4) for Natural Gas or
Appendix ‘A’ (p41) for LPG Propane, adjust as
required. Ensure no gas leaks are evident from the
gas connections, see Figure 5.6 (p9) for procedure.
Check thermostat settings and adjust if required.
5) Re-fit door and tidy floor around boiler as
necessary.
6) Check the operation of the condense trap and
clean if necessary by removing the trap and flushing
through with fresh water.
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
carrying out the appropriate part of the
commissioning procedure must check the operation
of each replaced component. See
Section 11.0:
Commissioning and Testing (p24).
NOTE: Isolate electrical supply to the boiler and
turn off the gas supply before removing controls
cover and commencing any servicing or
component exchange procedure.
14.1 Igniter Assembly
Reference to Figure 11.0 (p25) shows position of
igniter assembly. To remove assembly disconnect
the plug/socket on the supply lead and remove the
screw securing the igniter to the burner front panel.
Figure 14.1 (p37) shows diagram of igniter
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