Supplied By www.heating spares.co Tel. 0161 620 6677
14.4.5 Clean the primary heat exchanger. Cover the burner
manifold. Remove any deposits from the heat exchanger gaining
access from the top and bottom. Carefully straighten any
distorted fins on the heat exchanger.
14.4.6 Check the combustion chamber insulation. Replace the
insulation if there is any damage or deterioration. Refer to
Section 15.4.4.
14.4.7 Clean the controls in-situ using a non-metallic brush.
14.4.8 Carefully refit any components removed in the reverse
order. Check that all screws are tight and the connections
properly remade.
14.4.9 Recommission the appliance, as necessary, for correct
operation to the users requirements.
15.1
Important: Turn off the gas and electricity supplies
before replacing any components.
After the replacement of any components always check for gas
soundness where relevant and carry-out functional checks as
described in Section 12 - Commissioning.
Any O-ring or gasket that appears damaged must be replaced.
Complete gasket and O-ring packs are available for the gas and
water connections on the appliance.
15.2.
Component Access:
Refer to Section 14.3.1.1-4 for access to components.
15.3
Draining the Appliance
15.3.1 Primary System : Turn off the heating flow and return
valves at the appliance. Refer to Fig 26. Fit a tube to the drain
connection and open about one turn by turning anti-clockwise.
Close the drain tap when the water flow from the appliance has
stopped. Refer to Fig 41.
15.3.2 DHW Circuit : Turn off the mains cold water supply at the
appliance. Refer to Fig 26. Open a hot tap below the level of the
appliance to drain the domestic water circuit in the appliance.
15.3.3.
Important: A small quantity of water will remain in
some components even after the appliance has been drained.
Cover any electrical components when removing these items
.
15.4
Component Replacement:
Refer to Fig 17 for an indication of the location of the various
components.
20
Fig 42-Flue Hood Fixing
Fig 43-Spark Electrode
Fig 44-Flame Sense Electrode
Fig 45-Burner Assembly
1
2
3
4
1. Clamp Location
3. Flue Hood
2. Flue Hood Clamp
4. J-Bolt and Wing Nut
4
5
1
2
3
1. Spark
Electrode
Assembly
2. Burner Blade
Assembly
3. Fixing Screws
(2)
4. Burner Support
Bracket
5. Electrode Lead
Connection
(Push on)
Gap
Dimension
5mm ±1
4
1
2
3
1. Flame Sense
Electrode
2. Electrode
Mounting and
Burner Support
Bracket
3. Fixing Screws (2)
4. Burner Blade
Assembly
1
2
3
4
5
6
7
8
1. Burner Blade Assembly
5. Manifold Support Bracket
Fixing Screw (2)
6. Burner Blade Locating
2. Burner Blade Assembly
Screw
3. Burner Location Slot
7. Manifold Fixing Screw
4. Burner Manifold With
8. O-Ring
Injectors
15. Replacement of Parts
