andrews OFS25 Installation Manual, Operation And Service Manual page 9

INSTALLATION
The burners are supplied complete with pre-wired control thermostat loom to a harness
plug with connects to the harness socket on the burner. The burners are supplied with
the flange fitted to the burner blast tube in the correct position. A gasket is also supplied
loose in the burner carton. See below for correct burner fitting to the heater.
Heater Models: OFS256, OFS63, OFS90 & OFS108
Locate the burner gasket on the two fixing studs fitted on the heater mounting flange.
Push the burner into the heater combustion chamber and locate the burner flange on the
two fixing studs fitted on the heater mounting flange and tighten the two fixing bolts
supplied with the heater.
Burner Flange
Heater Model: OFS29
Because of the reduced height of the combustion chamber entry position it is necessary
to locate the burner onto the heater as the diagram below shows. The pump has been
rotated thro 180 o so that the solenoid is positioned above the vertical to ensure correct
operation.
The burner is fitted to the heater in the same way as heater models shown above.
Burner Flange
Heater Model: OFS163
The burner used on this heater is considerably bigger and heavier therefore a different
fixing method is required. (See below).
Locate the burner adaptor flange on the two fixing studs fitted on the heater mounting
flange and tighten the two fixing bolts supplied with the heater. Next locate both the
mating plate and the gasket onto the burner adaptor flange using the four locating studs.
Finally push the burner into the heater combustion chamber and located the burner
flange onto four locating studs and tighten the four fixing bolts supplied.
Burner Flange
Gasket
Gasket
Gasket Adaptor
Flange
Mating 4 Locating
Plate Studs
Heater
Mounting
Bracket
2 Locating Studs
Heater
Mounting
Bracket
2 Locating Studs
Heater
Mounting
Bracket
2 Locating Studs
SECTION 3
BURNER
ASSEMBLY
7