Glow-worm Ultracom2 cxi - Manual (Page 40)

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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