Install
NOTE: Dimensions A, A′, B, and B′ are obtained from
Shaded areas indicate
Fig. 9 — Concentric Duct Details
VI. STEP 6 — INSTALL FLUE HOOD AND INLET HOOD
Flue hood (smaller hood), inlet hood (larger hood), and screens are shipped inside the unit in the fan section. To install, remove the heat panel. The flue hood is attached to the heat section panel from the outside using the screws pro- vided. See Fig. 10.
The inlet hood is installed by inserting the hood through the back of the heat panel. Attach the hood by inserting the screws provided through the clearance holes in the heat panel and into the intake hood.
Install the screens into both hoods using the screws and retaining nuts provided with the unit.
Attach the cover of the observation hole on the intake hood and then replace the heat panel onto the unit to complete the installation.
NOTE: When properly installed, the flue hood will line up with the combustion fan housing. See Fig. 11.
VII. STEP 7 — TRAP CONDENSATE DRAIN
See Fig. 12 for drain location. One
All units must have an external trap for condensate drain- age. Install a trap at least 4 in. deep and protect against
VIII. STEP 8 — INSTALL GAS PIPING
Unit is equipped for use with natural gas. Refer to local building codes, or in the absence of local codes, to ANSI (American National Standards Institute)
Support gas piping. For example, a
FLUE HOOD
INLET HOOD
Fig. 10 — Flue and Inlet Hood Locations
COMBUSTION
FAN HOUSING
HEAT
EXCHANGER
SECTION
MAIN BURNER
SECTION