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16.9 ( F28e ONLY) Plate to Plate Heat
Exchanger
Drain the heating circuit, see section 13.8.
Drain the hot water circuit, see section 13.9.
Release Rhd. side panel to gain increased access.
Remove retaining clips from water connections, see diagram
16.6.
Remove the plate to plate heat exchanger from pipes.
When replacing water connectios fit the 'O' rings onto the
copper pipe tails, care should be taken not to damage 'O' rings,
when securing with retaining clips.
Refill, vent and pressurise the boiler.
SUPPORT
BRACKET
(F28e ONLY)
16 Replacement of Parts
16.10 Pump (head only)
For access, refer to section 16.1.
Drain the boiler heating circuit, see section 13.8.
Make sure that the filling loop valves are closed, then proceed
as Section 16.19.
Refer to diagram 16.7.
Remove the four cap head screws.
Carefully remove the pump head together with cable. Do not
strain cable.
Support the pump head, unscrew cable cover at the side of
pump head and take off.
Disconnect wiring from pump head.
Reconnect wiring to new pump head and fit cover.
Fit the new pump head with 'o' ring.
Refill, vent and pressurise the boiler.
Check for leaks.
CLAMPING
PLATE
(2 OFF)
RETAINING
SCREW
(4 OFF)
RETAINING
CLIP (4 OFF)
PLATE TO
PLATE HEAT
EXCHANGER
COLD WATER
INLET PIPE
Diagram 16.6
49
CABLE
COVER
PUMP
CAP HEAD
HEAD
SCREW (4)
(F28e ONLY)
PUMP HEAD
(F28e SB ONLY)
REDUCED PRESSURE
ZONE VALVE
SECURING
CLIPS
Diagram 16.7
CABLE
COVER
CAP HEAD
SCREW (4)
Diagram 16.7a
2000225242A
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