Installation manual

035-16682-000-E-0303
Unitary Products Group 15
soap solution or other material suitable for the purpose.
NEVER USE A FLAME
6. The furnace and its individual manual shut-off valve must
be disconnected from the gas supply piping system dur-
ing any pressure testing of that system at test pressures
in excess of 0.5 psig.
7. A 1/8 inch N.P.T. plugged tapping, accessible for test
gage connection, must be installed immediately
upstream of the gas supply connection to the furnace.
VENT AND COMBUSTION AIR
NOTE: All the hoods and hardware are shipped within the
evaporator section. Each hood must be properly
attached to the furnace doors to assure proper
operation and compliance with CSA/ETL safety cer-
tification. (Refer to Figure 7 and 8)
The products of combustion are discharged horizontally
through hooded openings in the gas heat access doors.
233 & 466 MBH HEAT
(Figure 7)
1. Remove the shipping covers that are attached to the
heat section door covering the flue outlets.
2. Locate the flue which is shipped in the evaporator sec-
tion.
3. Place the flue over the flue outlet with the diverter angles
facing up toward the top of the unit and attach with
screws provided.
4. Refer to the Gas Furnace Operation Instruction in the
Start-up Section of this manual for further instructions.
699 MBH HEAT
(Figure 8)
1. Remove the shipping covers that are attached to the
heat section door covering the flue outlets.
2. Locate the flue duct extensions and flue which are
shipped between the evaporator and filter section.
Disconnect gas piping from unit when leak testing
at pressures greater than 0.5 psig. Pressures
greater than 0.5 psig will cause gas valve damage
resulting in a hazardous condition. If gas valve is
subjected to pressure greater than 0.5 psig, it must
be replaced.
FIGURE 7 - VENT AND COMBUSTION AIR
HOODS
H E A T S E C T I O N D O O R
S H I P P I N G L A B E L S
( R E M O V E S H I P P I N G
L A B E L S P R I O R T O
V E N T I N S T A L L A T I O N )
V E N T F L U E A S S Y .
C O M B U S T I O N A I R I N L E T
E X H A U S T V E N T O U T L E T
FIGURE 8 - 669 MBH HEAT VENT
FIGURE 9 - FLUE EXTENSION
W INDSHIELD
REM OVE
SHIPPING
PLATES
OUTER DO O R PANEL
GAS HEAT SECTION
FLU E D U C
T
FLUE EXTENSIO N