Combustor Assembly (Continued)
Pull Combustor Assembly away from Heat Exchanger.
Note: The Burner Housing is sealed to the Heat Exchanger with an O-Ring.
Removal of the Combustor Assembly may require some sideways movement to
release the seal. Remove Burner O-Ring from the Burner Housing and discard.
Coat a new Burner O-Ring with GAA grease and install the O-Ring onto the Burner Housing.
Clean the mating surfaces of the Heat Exchanger to the Burner Housing using a cloth.
Check that the Primary Air Duct is not damaged, torn, or nicked. Replace if necessary.
Line up the Burner Housing with the Heat Exchanger and push into place.
Tip: To line up the Burner Housing use the Primary Air Duct as a guide to
determine the screw hole locations.
Using a 5/16" socket or nut driver, secure the Burner Housing to the Heat Exchanger by installing three (3)
hex-head bolts with flat washers and lock washers. Ensure that the two ground wires and Vent Sensor
connector clip are included. Tighten until the Burner mounting lugs are resting on the flanges of the Heat
Note: The three (3) bolts should be tightened so that the Burner Housing is pulled
into the Heat Exchanger in an even manner.
Ensure that the braided sleeving is in place on the fuel line. Place the hose clamp over the Fuel Line and secure
the Fuel Line onto the Burner Housing.
Note: Fuel Line removal may loosen the brass fuel line fittings. Check that all
fittings are secured into their housings, and Loctite (PSP 592) if necessary.
Check that the Burner Housing Burner Sensor fitting is clean. Insert the Burner Sensor and secure using a 7/16"
open ended wrench. DO NOT force the Burner Sensor through the hole.
Ensure that the Primary Air Duct is not kinked. Align as necessary.
Open the nylon clamp and place it over the Primary Air Duct where it meets the Top Housing. Check that the
"ears" on the clamp are rotated so that they will not interfere with the Top Shell, then squeeze the clamp tabs
tightly so that the teeth are engaged and it grips the Primary Air Duct.
Note: The Primary Air Duct provides the passage for air to the Burner. NO air
leakage is permitted.
Install Vent Fan Assembly (ref. 5.2.1)
Install Bottom Shell (ref. 5.1.3)
Install Top Shell (ref. 5.1.2)