JOHNSON CONTROLS
40
FORM 100.50-NOM12
ISSUE DATE: 04/02/2019
SECTION 2 – INSTALLATION
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.
7. A 1/8 inch N.P.T plugged tapping, accessible for
test gage connection, must be installed immedi-
ately upstream of the gas supply connection to the
furnace.
Combustion Vent
The combustion vent assembly is shipped in the return
air section of the unit. The combustion vent assembly
must be mounted over the flue gas outlet fixed panel
located to the right of the gas heat access door. Install
as follows:
1. Remove the combustion vent assembly from the
return compartment.
2. Remove the vertical row of six screws on either
side of the ue gas outlet xed panel.
3. Mount the combustion vent assembly over the
ue gas outlets and attach to the gas outlet xed
panel using the screws removed in step 2.
4. See Figure 14 on page 40 for the proper orienta-
tion of the combustion vent. The internal bafe(s)
must direct the ue gases upward.
FIGURE 14 - COMBUSTION VENT
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