DORCHESTER DR-FC 25, Installation, Commissioning And Maintenance Instructions

Page: 35 / 98

Conversion to a different gas category
Instruction Manual DR-FC 35
is
20. Disconnect the two pressure gauges and re-tighten the sealing screws in the
test nipples.
21. Replace the covers.
3.12 Conversion to a
different gas
category
c
Note
The conversion may only by carried out by an authorised installer.
If the water heater must operate on a family of gas (LP gas or natural gas)
other than the category of gas for which the water heater has been set up at
the factory, the water heater will have be adapted using a special conversion
kit.
c Note
After conversion, check the supply pressure and the burner pressure.
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. Undo the screws of the covers.
4. Carefully remove the black covers from the water heater.
5. Loosen the 2 screws of the electrical section, and remove the protective cap
from the electrical section Figure 3.6 ).
6. Detach the connector
1
that connects the cabling of the hot surface igniter
and the flame probe to the controller.
7. Detach the three-part gas coupling
2
adjacent to the burner.
- Detach the air supply hose
3
.
- Detach the detach the pressure switch hose
4
.