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Maintenance, 17 draining, 18 servicing – Glow-worm Ultracom2 cxi User Manual

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MAINTENANCE

Gas adjustment

G20

G31

CO2 case ON

9 ± 0.2 %

10.1 ± 0.2 %

CO2 case OFF

9.2 ± 0.3 %

10.3 ± 0.3 %

i

Safe combustion can only be verified by measuring

CO/CO2 ratio. This must not exceed the value

shown in the table under the section "Maximum Rate

and Adjustment".

16.1.3

Restarting

• Replace the cap

• Replace the appliance front panel.

Note: following the replacement of the front panel, the CO2

value will change: you can check that the value "case on" is

correct by the values in the previous table.

1

2

Key

1 Serial number stickers

2 Data label location

• Firmly attach the gas replacement label to the appliance in

the corresponding location (1) on the electrical box.

16.2 Restart - re-check commissioning

• Before putting the appliance into operation, follow the

instructions within the chapter Specific adjustment.

17 Draining

17.1 Heating circuit

B

A

1

2

Key

1 Length of hose (not supplied)

2 Drain valve

• Drain down the heating circuit of the boiler only, by closing

the heating flow and return isolating valves. See chapter

"Hydraulic connection ► Gas and water connections"

• Attach a length of hose (1) to the drain point and open the

drain valve (2).

• After draining, close the drain valve (2) and remove the hose.

17.2 Domestic Hot water circuit

• Drain the Domestic Hot Water circuit by closing the cold-

water isolation valve on the wall mounting jig.

• Open one or more hot water taps to drain the hot water

circuit.

18 Servicing

• To ensure the continued efficient and safe operation of the

boiler it is recommended that it is checked and serviced as

necessary at regular intervals.

The frequency of servicing will depend upon the particular

installation conditions and usage. However it is recommended

that the boiler is inspected as part of a service at least once a

year.

If this appliance is installed in a rented property there is a duty

of care imposed on the owner of the property by the current

issue of the Gas Safety (Installation and Use) Regulations,

Section 35.

• Servicing/maintenance should be carried out by a

competent person approved at the time by the Health and