Through The Base Gas Installation - American Standard YSC036A Installation, Operation And Maintenance Manual

Figure 21. Downflow view
3. Lift the tube and bracket from the
downflow duct opening. Rotate
the tube and bracket assembly
180 degrees ensuring that the
holes on the copper sensing tube
face away from the unit and face
the return air ductwork. Refer to
Horizontal View.
Figure 22. Horizontal view 2
4
2
24
Note: Check to insure that the
flexible tubing lies flat on the
base pan surface.
4. Slide the top bracket down the
copper sensing tube. For
YSC036A-060A, YHC033A-060A,
YSC036E-060E, and YHC036E
units insert the tab on the left
side into the slot on the indoor
coil blockoff and secure the right
side of the bracket with one of
the 3 screws removed in step 2.
Refer to Horizontal View 1. For
YSC072A-120A, YHC072A-120A,
YHC048E-060E and YSC072E-
120E units secure the tab on left
side to the indoor coil blockoff
with one of the screws removed
in step 2 and secure the right
side of the bracket with one of
the screws removed from the
access panel. Refer to Horizontal
View 2.
Figure 23. Horizontal view
5. Using the remaining 2 screws
removed in step 2, secure the
bottom bracket. Refer to
Horizontal View.
Note: Larger diameter holes on
bottom bracket line up with
the dimples on the rear panel.
The smaller diameter holes
line up with the screw holes
in the rear panel.
Installation
Main Electrical Power
Requirements
WARNING
Hazardous Voltage w/
Capacitors!
Disconnect all electric power,
including remote disconnects and
discharge all motor start/run
capacitors before servicing. Follow
proper lockout/tagout procedures to
ensure the power cannot be
inadvertently energized. Verify with
an appropriate voltmeter that all
capacitors have discharged. Failure
to disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
Verify that the power supply
complies with the unit nameplate
specifications.
• Inspect all control panel
components; tighten any loose
connections.
• Connect properly sized and
protected power supply wiring to
a field-supplied/installed
disconnect switch and to the
main power terminal block
(HTB1) in the unit control panel.
• Install proper grounding wires to
an earth ground.
Note: All field-installed wiring must
comply with NEC and
applicable local codes.
Through the Base Gas
Installation
The gas supply line must extend
4-5/8" above the basepan. 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.
Remove the pipe assembly strapped
to the manifold. Unscrew 90° elbow
from 6 1/2" nipple and slide rubber
grommet off of nipple.
1. Remove the plastic plug from the
hole in the center post and insert
the grommet removed from
6-1/2" pipe nipple.
2. Using pipe sealant, attach the 90°
elbow to the gas supply line.
3. Disconnect the 5" pipe nipple
and union from the "Through the
Base Gas kit assembly".
RT-SVX21F-EN