DORCHESTER DR-FC 120, Installation, Comissioning And Maintenance Instructions

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Instruction manual DR-FC 41
is
4 Conversion to a
different gas category
4.1 Introduction Caution
The conversion may only by carried out by a competent person.
If the water heater must operate on a family of gases (LP gas or natural gas)
or other gas category than that for which the water heater has been set at the
factory, the water heater will have to be adapted using a special conversion
kit.
Caution
After conversion you must check and adjust the supply pressure, the CO
2
value and the switching pressure.
4.2 Conversion of
DR-FC 25 through 60 1. Isolate the water heater from the power supply (10.3 "Isolating the water
heater from the mains") .
2. Shut off the gas supply.
3. Undo the screws of the covers.
4. Carefully remove the covers from the water heater.
5. Detach the 3-part gas coupling (1) adjacent to the gas control valve.
6. Detach the hoses marked "H" and "L" at their couplings (3 and 4) on the gas
control valve. The hoses are attached with pneumatic couplings.
Detach coupling
7. Grip the nearest part of the pneumatic coupling.
8. Push this back.
9. Grip the hose firmly and pull it out of the coupling.
10. Release the coupling.
11. Unscrew the connector (2) from the gas control valve.
12. Remove the gas control valve from the venturi flange (6, four Phillips
screws).
IMD-0804 R0
1. 4. 3. 2.