Glow-worm 38cxi Instructions For Use Installation And Servicing

43 0020008154A
14 Replacement of Parts
Diagram 14.12
Diagram 14.13
PUMP
HEAD
CAP HEAD SCREW (4)
SAFETY
DISCHARGE
VALVE
Diagram 14.14
14.15 Pump (head only)
For access, refer to section 14.1.
Refer to section 12.9 and drain the boiler heating circuit.
Refer to diagram 14.12.
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.
14.16 Safety Discharge Valve
For access, refer to section 14.1.
Refer to section 12.9 and drain the boiler heating circuit.
Refer to diagram 14.13.
Undo the safety discharge valve union and remove from the
pipework.
Remove the securing clip and withdraw the safety discharge
valve.
Fit new 'O' ring.
Refill, vent and pressurise the boiler.
Check for leaks.
14.17 Domestic Hot Water Thermistor
For access, refer to section 14.1.
Refer to section 12.10 and drain the boiler domestic hot water
circuit.
Refer to diagram 14.14.
Disconnect the domestic hot water thermistor electrical
connections
Remove retaining clip.
Withdraw domestic hot water thermistor from its housing.
NOTE: When reconnecting electrical connections, polarity is not
important.
Fit new 'O' ring.
Carry out a functional test of the controls.
14.18 Heating Flow Thermistor
For access, refer to section 14.1.
Refer to diagram 14.15.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the flow pipe.
Note: When reconnecting, the polarity of the wiring to thermistors
is not mportant.
14.19 Heating Return Thermistor
For access, refer to section 14.1.
Refer to diagram 14.15.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the flow pipe.
NOTE: When reconnecting, the polarity of the wiring to thermistors
is not important.
CABLE
COVER
DOMESTIC HOT
WATER
THERMISTOR
RETAINING
CLIP
11694
11495
11496

Glow-worm 38cxi Specifications

General

Model	38cxi
Category	Boiler
Output	38 kW
Efficiency	89.2%
Efficiency Rating	A
ERP Rating	A
Fuel Type	Natural Gas
Mounting	Wall Mounted
Max. Working Pressure	3 bar
Electrical Supply	230V ~ 50Hz
Flow Rate at 35°C Rise	15.7 litres/min
Central Heating Flow Temperature Range	30°C to 80°C
Type	Condensing Combi Boiler
Flow Rate	15.7 litres/min at 35°C rise