Potterton Medway Super, Инструкция по установке и обслуживанию

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9
5. SERVICING – page 9
Operate the appliance noting any faults in the component
units. Carry out the servicing procedure then correct any
other faults by reference to ‘Replacement of Parts’, in which
section you will find details of how to dismantle and
reassemble the following detailed components. Check that
the burner ignition is smooth and quiet when a hot tap is
opened. The burner ignition has been factory set and should
not need adjustment. However, if adjustment is required a
slow ignition screw is fitted to the appliance and is situated
above the cap screw in the water governor body (fig. 16).
The screw is factory set 2 full turns out (anti-clockwise) from
the fully in position. Turning the screw clockwise delays the
ignition, anti-clockwise advances the ignition.
Fig 14
WARNING: NEVER OPERATE THIS
APPLIANCE WITH THE OUTER CASE
REMOVED.
1. Check the piezo unit, flame safety device and
thermocouple, clean or replace if necessary.
2. Remove the burner assembly and clean using a soft
brush or vacuum cleaner.
3. Check the pilot injector and clean or replace if
necessary. Also clean the lint filter.
4. Remove the water governor assembly complete with
push rod. Replace the seals if necessary. Descale and
regrease the push rod, washers and diaphragm housing
using Dow Corning 111 silicone grease.
5. Check for water and gas soundness. Replace ‘O’ rings,
sealing washers and gaskets where required.
Fig 15
6. Clean any deposits off the heating unit by washing or
brushing. Descale the heating unit if required.
Fig 16