Hamworthy Purewell VariHeat 110c, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
40
PUREWELL Vari
Heat c
500001169/T
electrically isolated so as to prevent accidental operation., in the event that the installation is required for
ongoing heating requirements.
10.2
The procedures detailed relate to a single boiler and must be carried out on all boilers within a bank. Before
servicing the boiler, the following procedure must be carried out: -
WARNING: Isolate the electrical supply and turn off the gas isolating valve to the boiler being serviced.
1) To remove the front casing door, remove the four 1/4 turn screws securing the fascia moulding. Pivot the fascia
moulding about it’s bottom edge to 45 degrees and lift off. Store in a safe place to avoid damage. Remove the two 1/4
turn screws (rotate clockwise a 1/4 turn) securing the front casing door and lift off from the front brace. Remove the two
1/4 turn screws fixing the top panel and slide the panel in the direction of the rear of the boiler to disengage from the
securing pins on the back panel.
2) Turn off gas service cock.
3) Disconnect the gas valve plug assembly from the gas valve & the low gas pressure switch plug. Disconnect
the gas valve inlet flange from the gas valve. Disconnect the 3 & 5 way electrical plugs from the fan body.
4) Disconnect igniter and probe leads. Disconnect the fan/gas valve assembly from the burner body by removing
the 4 M8 nuts securing the transition duct to the burner. Carefully place the fan/gas valve to one side.
5) Loosen the 4 - M8 nuts securing the burner clamping flange to the tie rods and carefully remove the clamp.
The burner assembly can be removed by withdrawing upwards
(care is required when removing the burner as the
Hot Surface Igniter element is fragile)
. Check condition of igniter assembly and probe for damage. Clean
as required. Check burner surface and clean using a soft brush if required (if possible use compressed air to blow
out the dust inside the burner. A damaged burner must be replaced.
6) Examine the non return valve located in the fan/burner duct for free operation and integrity of the foam seal.
Replace if necessary.
7) The procedure to disconnect the fan from the boiler so the fan impellor can be inspected & cleaned using a soft
brush & compressed air is as follows.
I) For model PV70c/95c/110c (Refer to Figures 11.2.& 11.3 for parts assembled between the gas valve & fan )
A) Disconnect the silicon tube attached to the gas valve.
B) Disconnect the gas valve from the air box lid by removing the screws in the square flange of the lid.
C) Remove the screws securing the air-box from it’s lid.
D) Unscrew the screws fixing the venturi to the metal plate molded in the airbox.
E) Remove the screws behind the venturi fixing the airbox to the fan.
II) For Models PV140c/180c (Refer To Figure 11.4 For Fan/Gas Valve Assembly) remove the screws attaching
the metal bracket & plastic venturi to the fan.
A) Remove the screws securing the gas valve to the corrugated gas supply pipe.
B) The subassembly of gas valve, metal bracket & plastic venturi can be carefully removed for access to the fan.
10.3
The boiler flueways can now be cleaned as follows:-
1) Remove the inspection panel secured to the front base of the boiler must be removed.
2) Using a suitable brush, clean the vertical fins on the castings below the burner.
3) Using a torch, inspect the fin matrix of the secondary heat exchanger situated below the cast iron sections
and clean using compressed air or a water hose. Any debris dislodged can be removed from the sump
through the inspection panel.
4)
Re-assemble the boiler in the reverse order to that shown above. Ensure a new seal is fitted to the top
casting / burner joint to maintain a gas tight seal, (see spares list). Ensure that a new seal is fitted to the
inspection panel. The boiler’s operation may be affected if these seals are do not form a gas tight joint.
5)
Re-assemble the burner and clamp plate to the top casting and secure using the M8 nuts and tie rods,
ensuring that the joint is sound. Assemble the gas valve, fan, transition duct using new gaskets. Refit the gas
inlet flange to the gas valve using a new ‘O’ ring. Check all gas connections are tightened securely before
opening the gas service cock. Re-connect electrical connections. Switch on the electricity supply and re-light
the boiler following the procedure detailed in section 7.3.
6)
Take exhaust gas readings and compare with section 7.4. Ensure no gas leaks are evident from the gas
connections, refer to section 7.1 for procedure. Check thermostat settings and adjust if required.
7)
Re-fit casing panels and tidy floor around boiler as necessary.