Glow-worm Ultracom 2 24cxi User Manual

Supplied By www.heating spares.co Tel. 0161 620 6677
0020085231_02 - 05/10 - Glow-worm
- 51 -
Legend
1 Igniter unit retaining bracket
2 Igniter unit
3 Igniterunitretainingscrew
4 Igniter unit electrical connector
5 Electrode / igniter unit connection cable
6 Earth cable
7 Spark electrode cap
8 Sparkelectroderetainingscrew
9 Spark electrode gasket
10 Spark electrode
11 Combustion burner door assembly
12 Combustion burner door assembly - nut
13 Combustion burner door assembly - gasket
14 Burner gasket
15 Burner
16 Burnerretainingscrew
17 Heatexchangerretainingscrew
18 Heat exchanger retaining bracket
19 Burnergateretainingscrew
20 Thermal fuse connection
21 Heat exchanger
22 Heat exchanger retaining bracket
23 Heatexchangerretainingscrew
24 Heating return pipe
25 Heating return pipe retaining clip
26 Return heating temperature sensor
27 Heatingowpipe
28 Flowheatingtemperaturesensor
29 Heatingowpiperetainingclip
30 Gasvalveretainingscrew
31 Gas valve
32 Gas valve gasket
33 Fan
34 Fan electrical connection
35 Fan/burner gasket
36 Gas pipe
37 Gas valve electrical connection
38 Fanretainingscrew
19.5.1 Spark electrode
• Disconnect the electrode cap (7) and the earthing cable (6).
• Remove the 2 spark electrode retaining screws (8).
• Carefully remove the electrode (10) from the combustion
chamber.
• Remove the gasket (9).
• Check that the distance between the 2 electrodes is between
3.5 and 4.5 mm.
• Install the electrode and a new gasket.
19.5.2 Igniter unit
• Remove the ignition lead (2).
• Remove electrical connections (4).
• Loosen the screws (3) located on the igniter unit (2).
• Remove the igniter unit (2).
19.5.3 Removing the combustion/burner door
assembly
b
Warning: The gasket (13) must be replaced each
time the combustion/burner door assembly is
removed.
• Disconnect the spark electrode cap (7) from the igniter unit.
• Disconnect the gas supply pipe (36) at the gas valve.
• Remove the electrical connectors from the gas valve (37)
and the fan (34).
• Remove the retaining screw of the silencer.
• Loosen the 4 nuts (12).
• Remove the combustion/burner door assembly from the heat
exchanger (11).
• The studs (19) must not be damaged. If damaged you will
need to replace the heat exchanger.
• The combustion/burner door assembly insulation should be
inspected and replaced if damaged.
19.5.4 Burner
• Remove the 3 burner retaining screws (16).
• Remove the burner (15) and the gasket (14).
• Fit the new burner and the new gasket.
19.5.5 Heat exchanger
b
There will be water in the heat exchanger.
Carefully ease heat exchanger out.
• Drain the boiler heating and hot water circuits as described in
the appropriate chapter "Draining".
• Remove the ue connection.
• Undo the two screws located on the top of each side panel.
• Remove the thermal fuse connector (20).
• Remove the 2 heating pipe retaining clips (25) and (29).
• Release the heating pipes (24) and (27) from the heat
exchanger.
• Release the condensate trap pipe from the heat exchanger.
• Remove the combustion/burner door assembly (11)
refering to chapter "Removing the combustion/burner door
assembly".
• Unscrew the 4 retaining screws (17) and (23) and remove
the 2 retaining plates (18) and (22) from the heat exchanger.
• Pull the heat exchanger towards you to extract it from its 2
side rails.
MAINTENANCE

Glow-worm Ultracom 2 24cxi Specifications

General

Model	Ultracom 2 24cxi
Category	Boiler
Central Heating Output	24kW
Mounting	Wall-mounted
ERP Rating	A
DHW Output	24kW
Heating Flow Temperature Range	30-80°C
DHW Flow Rate at 40°C Rise	8.6 l/min
DHW Flow Rate at 50°C Rise	6.9 l/min
Warranty	2 years
Expansion Vessel	8 liters
Type	Combi Boiler