25
Conversion Procedure
NOTE:
•
These conversions should only be carried out by qualified persons. All connections
must be checked for leaks before re-commissioning the appliance.
•
For all relevant gas specifications refer to the table at the end of this section.
1.
Ensure that the gas and electrical supplies have been turned off at
the mains supply.
2.
Open the front door of the unit to access the main burner and gas
control valve.
3.
Connect a manometer to the upper test point (Supply Pressure) on
the gas control valve. Ensure that the supply pressure is within
the specification shown in the ‘Gas Specifications Table’ at the end
of this section.
Main Burner Injectors
1.
Unscrew the nut securing the injector gas supply tube to the gas
valve fitted into the blower / burner air manifold and air manifold
connection.
2.
Unscrew and remove the brass injector connector and remove
injector fitted to the end of the adapter.
3.
Determine the correct injectors for the corresponding gas type
from the ‘Gas Specifications Table’ shown at the end of this section
and refit to the main burner.
4.
Reconnect the injector gas supply tube to the gas
valve, blower / burner air manifold and air manifold
connection.
5.
Remove the 3 screws securing the aeration plates to
the side of the blower motors and replace with the
correct plates. (Refer to Fig 10). Refer to the ‘Gas Specifications
Table’ shown at the end of this section for details.
Main Burner Operating Pressure Adjustment
a. Connect a manometer to the lower test point (Operating
Pressure) on the gas control valve. (Refer to Fig 8 above).
b. Remove the regulator slotted brass cap on the gas control
valve, this will reveal a pressure adjusting screw. (Refer to Fig
7 above).
c. Turn on the gas supply and power supply at the mains
connector and light the main burners. Adjust the regulator
pressure adjusting screw to obtain the correct burner pressure
for the type of gas being used. Refer to the ‘Gas Specifications'
table shown at the end of this section.
d. Refit the regulator slotted brass cap to the adjustment point on
each gas control unit and refit the service panels.
NOTE: Each burner has a separate gas valve / regulator and each must be individually
adjusted and set.
Gas Conversion and Specifications
C
AUTION
:
Ensure that the unit is isolated from the gas and electrical supplies before
commencing servicing.
Operating
Pressure
Test Point
Supply Pressure
Test Point
Pressure
Adjusting
Screw
Injector Gas
Supply Tube
Injector
Connector
Aeration
Plate
Blower
Aeration Plate
Attachment
Screws (3)
Mixer
Tube
Injector
Fig 8
Fig 9
Fig 10
