Installing Your Furnace
16
COMPLETE THE VENTING
Refer to Fig. 18.
Install oval to round adapter. Complete the piping extending it
through the roof. Use 4" round, double wall (Type B) vent pipe,
roof flashing, storm collar, and vent top as shown. The vent cap
must be at least 2 feet higher than any point that is within 10 feet
horizontally of the vent cap. There must be at least 1 inch
clearance between the vent pipe and any combustible material.
IMPORTANT
Area above header within the stud space MUST be kept clear of
any attic insulation to allow the free circulation of air around oval
vent piping.
Mounting Your Furnace
To obtain adequate clearance for fastening furnace or to install
gas supply fittings, it may be necessary to remove the burner and
control assembly as follows:
Remove burner compartment door by pulling door top out and up.
Locate the air discharge shield. It is secured across the top of the
burner control compartment. Remove two (2) screws and shield
and set aside. Refer to the illustration on Page 32 #27A or 34 #21.
DISCONNECT WIRING
MODELS: 3508231; 3508232; 5508231; 5508232
Remove the screws holding the ignition control unit and cover to
the furnace casing.
Disconnect wires to free control module from its mounting
location. Mark or tag each wire removed for its exact
reconnection. Refer to Page 17, Fig 19.
ALL OTHER MODELS
Disconnect two (2) 24 volt wires from the gas valve. Disconnect
two (2) wire connectors from junction block midway on the
thermocouple
REMOVE BURNER AND CONTROLS
MODELS: 3508231; 3508232; 3508631; 3508632
Locate the burner and screws that secure it. Remove the two (2)
screws (one from each end). Lift one end of the burner at a time
until free. Remove burner and controls from the compartment.
FIGURE 18 Typical Vent Installation
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