37
18.13 Pressure relief valve:
•
Read the notes at the head of this section before commencing
any work on the appliance.
•
Disconnect the discharge pipe on the outlet of the safety valve.
•
Disconnect the safety valve from the diverter valve.
(Figure 46)
•
Fit the replacement safety valve in reverse order from removal
and re
fi
ll, vent and pressurise the boiler ensuring all joints are sound
and service valves open.
Figure 46
If gas conversion is required (from NG to LPG etc.), follow the instructions below using only
approved components from your agent:
•
A
fl
ue gas analyser must be used when making any adjustments that can affect the
combustion characteristics of the boiler. (this includes converting to a different gas type)
•
Change the diaphragm, which is located in the outlet of the gas valve.
( See section 2 - technical data table for gas valve diaphragm details )
•
Once re-assembled check for gas tightness.
•
Set the CO2 as described in section 18.11 Gas Conversion Setting noting the correct
CO2 value for the type of gas that will be used.
•
Check for correct boiler operation.
19. Gas Convention
Warning!
Gas conversion must be carried out by a competent person as
de
fi
ned in the Gas Safety (Installation and Use) Regulations.
Important!
Gas type conversion must be completed by attaching the labels
included in the gas conversion kit to the boiler.
•
Type of gas label – in a visible position inside the boiler.
•
Grey label – to cover the existing gas type on the data plate.
•
Instruction label – Inside drop down cover on the front of the
boiler.
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