8.7
HEAT EXCHANGER
(Fig. 6.7.2 item 41)
i)
Isolate the appliance (Section 8.1)
ii)
Gain access (Section 8.2)
iii)
Shut off the water supply to the appliance.
iv)
Remove the burner (Section 8.6)
v)
Drain the system to below the level of the appliance.
vi)
Remove the flue thermistor (Section 8.4.4)
vii)
Remove the spark ignition/flame detection electrode (Section 8.5)
viii)
Remove the flue connection by slackening the retaining strap and pulling the flue off
the heat exchanger spigot.
ix)
Remove the condensate trap (Section 8.8)
x)
Disconnect the flow and return pipe union nuts (Fig 6.7.2 item 68) from the heat
exchanger.
xi)
Remove the two screws (Fig. 6.7.2 item 66) fixing the heat exchanger to the top.
xii)
Remove the heat exchanger
xiii)
Reassemble (Section 8.3)
xiv)
Recommission (Section 5 - Commissioning)
8.8
CONDENSATE TRAP
(Fig. 6.7.2 item 51)
i)
Isolate the appliance (Section 8.1)
ii)
Gain access (Section 8.2)
Remove the two screws and washers (Fig. 6.7.2 items 76 and 77) fixing the
condensate trap to the base of the cabinet.
iii)
Disconnect the condense line from the projection of the condensate trap from the
base of the cabinet.
iv)
Withdraw the condensate trap.
v)
Mop up any spilled condensate.
vi)
Reassemble (Section 8.3)
NB:
When reassembling inspect the oring (Fig 6.7.2 item 73) for damage and
replace if necessary. When re-fitting the condensate trap pour water until
nearly full. Then reconnect the condensate trap to the base of the heat
exchanger.
WD440/3/2007 Chapter 8 : Replacement Of Parts
The Keston Qudos 28h & Qudos 28hP
Boilers
Installation & Servicing Instructions
Page : 48
