DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

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Conversion to a different gas category
Instruction manual DR-RS 39
3.12 Conversion to a
different gas
category
3.12.1 Introduction
If the water heater must operate on a family of gas (LP gas or natural gas) or
other gas category than that for which the water heater has been set up at the
factory, the water heater will have to be adapted using a special conversion kit.
Warning
The conversion may only by carried out by an authorised installer.
Warning
After conversion, check the supply pressure and the burner pressure.
3.12.2 Conversion
1. Disconnect the water heater from the mains. See paragraph 7.3.2 Isolate
the water heater from the power supply .
2. Shut off the gas supply.
3. Referring to
Table 3.5 , compare the present gas category with the target gas
category and ascertain whether the diameter of the pilot flame orifice is
different. If this is the case, then the pilot flame orifice must be replaced. See
paragraph ’3.11.3 Replace orifice’.
4. Referring to Table 3.5 , compare the present gas category with the target gas
category and ascertain whether the diameter of the main orifice is different.
If this is the case, then the main orifices must be replaced. See paragraph
3.12.3 Replacing orifices .
5. Referring to Table 3.5 , compare the present gas category with the target gas
category and ascertain whether there is a different use of a flat plate or
burner pressure regulator. If this is the case, then these must be exchanged.
See paragraph
3.12.4 Replacing burner pressure regulator or flat plate
(DR-RS 25-40-65-85) .
6. Referring to Table 3.5 , compare the present gas category with the target gas
category and make the appropriate adjustments. See paragraph
3.11 Checking the supply pressure and burner pressure .
n
Remark
The present gas category is stated on the rating plate.