Installation
RT-SVX46C-EN
23
Through-the-Base Gas Installation
The gas supply line must extend 4
⅝
”
above the base pan.
The “Through-the-Base Gas” kit is located in the Heat
Vestibule compartment.To gain access to the kit, remove
the Heat Compartment access panel.
1.
Remove the pipe assembly strapped to the manifold.
Unscrew 90° elbow from 6½” nipple and slide rubber
grommet off of nipple.
2. Remove the plastic plug from the hole in the center
post and insert the grommet removed from
6½” pipe nipple.
3. Using pipe sealant, attach the 90° elbow to the gas
supply line.
4. Disconnect the 5" pipe nipple and union from the
“Through-the-Base Gas” kit assembly.
5. Using pipe sealant, attach the 6½” nipple and gas
shutoff assembly to the 90° elbow on the gas supply
line.
6. Using pipe sealant, attach the 5" pipe nipple and union
to the street el attached to the gas valve.
7.
Connect 5" pipe nipple and union to 6½” nipple and
gas shutoff assembly.
Requirements for Gas Heat
Note:
The unit gas train and optional through-the-base
gas shut-off valve are rated at 1/2 PSIG maximum.
A pressure reducing regulator is recommended to
prevent this maximum from being exceeded.
These components must be isolated during field
gas piping test that exceed 1/2 PSIG. It is
recommended that the field piping be capped prior
to the unit gas train or optional through-the-base
gas shut-off valve if present.
•
Gas supply line properly sized and connected to the
unit gas train.
•
All gas piping joints properly sealed.
•
Gas piping leak checked with a soap solution. If piping
connections to the unit are complete, do not pressurize
piping in excess of 0.50 psig or 14" W.C. to prevent
component failure.
•
Drip leg Installed in the gas piping near the unit.
•
Minimum gas supply pressure should be 4.5" W.C.
•
Maximum gas supply pressure must not exceed 14.0"
W.C.
•
Manifold pressure for single stage heaters should be
set to 3.3" W.C.
•
Manifold pressure for two stage heaters should be set
to 3.5" W.C. on HIGH FIRE and 1.8" W.C. on LOW FIRE.
•
Flue Exhaust clear of any obstruction.
Condensate Drain Configuration
An evaporator condensate drain connection is provided
on each unit. Refer to
and
for the appropriate drain location.
The condensate drain pan is factory installed to drain
condensate to the back side of the unit. See
and
. It can be converted to drain
condensate out the front side of the unit or through-the-
base.
To convert drain condensate out the front of unit:
1.
Remove evaporator access panel and supply air access
panels.
2. Remove the support panel that the condensate drain
pan exits through.
3. Slide the condensate drain pan out of the unit and
rotate 180°.
4. Slide the condensate drain pan back into the unit, align
the drain with the grommeted opening in the rear
support panel and push until the coupling is seated in
the grommet.
5. Replace the front support panel by aligning the panel
with tabs in the raceway. Align the condensate drain
pan support in the grommeted hole as the panel is put
in place.
6. Replace evaporator access panel and supply air access
panels.
To convert drain condensate through-the-base of unit:
1.
Remove evaporator access panel and supply air access
panels.
2. Remove the support panel that the condensate drain
pan exits through.
3. Slide the condensate drain pan out of the unit.
4. Place on a level surface in the position it was removed
from the unit.
5. Remove the plug knockout in the bottom of the drain
pan to convert it to through-the-base drainage.
6. Plug the original condensate drain opening with a field
supplied 3/4” NPT plug.
Figure 20.
Typical through-the-base gas installation
90° Elbow
6 1/2” (165 MM) Pipe Nipple
Gas Shut-Off Valve
and Street Elbow
90° Elbow
and Nipples
5” (127 MM) Pipe Nipple and Union
