Glow-worm Ultracom2 35 Store - Manual (Page 55)

0020112185_PROTO_13 - 01/11 - Glow-worm
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Key
1 Safety Discharge Valve
2 Safety Discharge Valve discharge pipe
3 Domestic hot water pump head connector
4 Domestic hot water pump head
5 Domestic hot water pump head nut
6 Domestic hot water pump housing
7 "foaming" filter retaining clip
8 "foaming" filter
9 Heating pump head connector
10 Heating pump head
11 Heating pump head retaining srcews
12 Heating pump head earth lead
13 Automatic air vent retaining clip
14 flexible 3WV / tank
15 Heating pump housing
16 Automatic air vent
17 Heating return pipe retaining clip
18 Heating return pipe
19 Heating expansion vessel pipe
20 Hot water temperature sensor
21 flexible 3WV / tank
22 Low water pressure sensor connector
23 Low water pressure sensor
24 Low water pressure sensor retaining clip
25 Hot water heat exchanger output temperature sensor
26 Domestic hot water pump housing retaining clip
27 flexible 3WV / tank
28 Pipe
29 Plate-to-plate heat exchanger
30 Heating flow pipe
31 bypass screw
32 Plate-to-plate heat exchanger retaining screws
33 bypass retaining clip
34 flexible 3WV / tank retaining clip
35 Three-way valve
36 Three-way valve electrical plug
37 Three-way valve retaining screws
38 flexible 3WV / tank retaining clip
39 Safety Discharge Valve discharge retaining clip
19.4.1 Heating pump (head only)
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Disconnect the electrical plug (9) from the main board.
• Disconnect the electrical plug (12) from the pump head.
• Remove the four cap head screws (11).
• Carefully remove the pump head (10) together with cable.
Do not strain cable.
• Reconnect wiring to new pump head and fit cover.
• Fit the new pump head by repeating the operations in reverse.
19.4.2 Safety discharge valve
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Undo the safety discharge valve union and remove from the
pipework (2).
• Remove the securing clip (39) and withdraw the safety
discharge valve (1).
• Fit new ‘O’ ring. Refill, vent and pressurise the boiler.
19.4.3 Automatic air vent
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Remove the retaining clip (13).
• Remove the automatic air vent (16).
• Fit the new automatic air vent and ‘O’ ring ensuring the vent
cap is left loose.
• Refill, vent and pressurise the boiler.
19.4.4 Low water pressure sensor
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Disconnect the electrical lead (22).
• Remove the retaining clip (24), remove the low water pressure
sensor (23).
• Fit the new low water pressure sensor.
• Refill vent and pressurise the boiler.
19.4.5 bypass
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Remove the retaining clip (33) to remove the bypass screw (31).
• After replacing the bypass, refill, vent and pressurise the
boiler.
19.4.6 Three way valve
• Drain the boiler heating circuit as described in the appropriate
chapter "Draining".
• Disconnect the electrical plug (36).
• Remove the two retaining screws (37).
• Remove the three way valve (35).
• Fit new three way valve assembly.
• Refill, vent and pressurise the boiler.
19.4.7 "foaming" filter
• Drain the boiler heating and domestic hot water circuits as
described in the appropriate chapter "Draining".
• Remove the filter retaining clip (7) located under the pump.
• Relieve the "foaming" filter (8).
• Refill vent and pressurise the boiler.
MAINTENANCE