Factory-Mounted Unit Options
RT-SVX26R-EN
35
Through the Base Gas Utility
Option
This section contains the instructions for making field
connections to the Through the Base Gas Utility Option.
For gas piping, supply, and manifold pressure information
see the unit installation, operation, and maintenance
guide.
Field Installed Connections
Important:
All phases of this installation must comply
with NATIONAL, STATE, and LOCAL
CODES. In absence of local codes, the
installation must conform with American
National Standard-Z223.1a- National Fuel
Gas Code Latest Revision.
1. Field connections are made by first removing the
access panel for the heat section on the front of the
unit,
2. The gas piping assembly ships inside this section and
includes the shut-off valve, a pressure tap for testing,
and the necessary unions for field connection. For
through the base access, remove the factory-provided
cap from the base pan opening. See
.
3. Route field piping through this hole to the dimension
shown in
4. Place the assembly through the cabinet opening as
and make the union connection to
the field piping and to the gas train. Refer to the unit
IOM for checkout procedures.
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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06*-EN
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
WARNING
Outlet Pressure Check Required!
This unit uses a negative pressure gas valve. At start-
up, the outlet pressure should be checked and adjusted
if required to a negative -0.2 inches of water column.
Never adjust the regulator to a positive pressure.
Failure to follow instructions could result in death or
serious injury or equipment damage.
Table 11. Piping hole dimension
Model
Dimension
YS*150-300, YH*150-300
1 3/16"
Figure 26.
Through the base opening
Figure 27.
Gas piping
