Keston C36 Installation Manual download pdf (Page 50)

iii) Remove the combustion blower (Section 8.4.7)

iv) Remove the 4 nuts fixing the burner to the top of the heat exchanger.

v) Withdraw the burner from the top of the heat exchanger.

vi) Reassemble (Section 8.3)

NB: When reassembling inspect any gaskets for damage and replace if

necessary.

8.7 HEAT EXCHANGER (Fig. 6.7.2 - 1/3 item 39)

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 using the drain off tap (Fig.

6.7.4 - 2/2 item 180) at the base of the boiler return pipe.

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 hose (Fig 6.7.2 - 1/3 item 54) by releasing the retaining

clamp and pulling the hose away from the spigot at the base of the heat exchanger.

x) Disconnect the flow and return pipe union nuts (Fig 6.7.2 - 2/3 & Fig. 6.7.2 - 3/3 item

60) from the heat exchanger.

xi) Remove the two screws (Fig. 6.7.2 - 1/3 item 41) fixing the heat exchanger to the top

and the screw (Fig. 6.7.2 - 1/3 item 42) fixing the heat exchanger to the bottom.

xii) Remove the heat exchanger

xiii) Reassemble (Section 8.3)

xiv) Recommission (Section 5 - Commissioning)

8.8 CONDENSATE TRAP (Fig. 6.7.2 - 1/3 item 51)

i) Isolate the appliance (Section 8.1)

ii) Gain access (Section 8.2)

iii) Disconnect the condensate line from the base of the heat exchanger.

iv) Disconnect the condense line from the projection of the condensate trap from the

base of the cabinet.

v) Withdraw the condensate trap.

vi) Mop up any spilled condensate.

vii) Reassemble (Section 8.3)

NB: When re-fitting the condensate trap pour water onto the condensate hose

from the base of the heat exchanger until nearly full. Then reconnect the

condensate hose to the base of the heat exchanger.

8.9 HYDROBLOCK PUMP (Fig. 6.7.2 - 1/3 item 56)

i) Isolate the appliance (Section 8.1)

ii) Gain Access (section 8.2)

iii) Isolate the waterways to the boiler using the system isolation valves.

iv) Drain the system to below the level of the appliance using the drain off tap (Fig.

6.7.4 - 2/2 item 180) at the base of the boiler return pipe.

v) Undo the screw (Fig. 6.7.1 item 145) to the panel support (Fig. 6.7.4 - 1/2 item 35)

and rotate it on the right.

vi) Disconnect the pump electrical cable from the connections box of the pump head

taking note of the correct position.

vii) Remove the four allen bolts securing the pump head to the hydroblock back body.

viii) Remove the pump head.

ix) Reassemble (Section 8.3)

8.10 DHW HEAT EXCHANGER (Fig. 6.7.2 - 1/3 item 57)

i) Isolate the appliance (Section 8.1)

WD388/0/2004 Chapter 8 : Replacement Of Parts The Keston C36 Combi & C36P Combi Boilers

Boilers

Installation & Servicing Instructions Page : 45

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Keston C36 Installation Manual Page 50

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