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Page 9
GAS-FIRED VENTED WALL FURNACE
INSTALLATION SECTION
ROUGH-IN INSTRUCTIONS
WARNING:
Do not bypass the blocked flue switch. To do so could expose the consumer to property
damage, personal injury or possible death.
!
FIG. 3
NOTE: MAXIMUM WALL THICKNESS FOR A DUAL WALL
(W505, W506) INSTALLATION IS 5-3/8”.
STEP 1.
Attach the base plate (purchased with the vent pipe) to the
header plate using two No. 8 sheet-metal screws through
the pre-punched holes. The heater may not vent properly
without a base plate to anchor and seal the vent system.
See Figure 6 (on page 10).
Chimney
More than 10’
10’
2’ Min.
3’ Min.
Height above any
roof surface within
10’ horizontally
Ridge
10’ or Less
2’ Min.
3’ Min.
Chimney
Ridge
FIG. 5: Gas Supply
To Heater Gas
Control Valve
Drip Leg
1/8” NPT
Pressure Tap
Gas
Supply
Line
Manual Cut-Off-Valve
FIG. 4-B
FIG. 4-A
Draft
Diverter
Relief
Opening
Combustion
Chamber
Man. Reset
Blocked
Flue Switch
Switch/
Gas
Control
Wire
Reset
Button