Trane TR250 Service & Installation Manual page 23

GAS SUPPLY INSTALLATION:
The heater is shipped from the factory with the gas connection
located on the left-hand side of the heater cabinet. Insert the pipe to
the gas valve through the grommet in the cabinet side (see Figure
10.) A union should be installed outside the heater cabinet for easy
removal of the gas manifold assembly during service.
A CSA certifi ed main gas shutoff valve must be installed outside
the cabinet and within 6 feet of the heater. This valve must have an
I.D. large enough to supply the proper amount of gas
volume to the heater. See Figure 9.
ATTENTION:
sparingly and only to the male threads of pipe joints.
Do not apply joint compound to the fi rst two
threads. Use joint compounds resistant to the action
of liquefi ed petroleum gas. Do not overtighten the
gas inlet pipe or damage may result.
ATTENTION : Do not use fl exible appliance
connectors on any gas connections unless the
connector is CSA approved for outdoor installation,
is marked with BTUH capacity (which must be
equal to or greater than the heater rated input) and
the type of gas (natural or LP).
Reduction of gas supply pipe or tubing to the inlet of
the heater gas valve must be made at the valve only and must match the valve inlet size (3/4" or 1" NPT).
If more than one appliance is installed on the gas line, consult the local gas company for the proper gas
line size.
Questions on the installation of the proper gas line size can be directed to 908-282-4897.
NATURAL GAS:
The gas meter must have the capacity to supply enough gas to the pool heater and any other gas appli-
ances if they are on the same pipeline (Example: 225 meter = 225,000 BTUH). If doubt exists as to the meter
size, consult the local gas utility for assistance. Natural gas must be "pipeline quality" supplied from a natural
gas utility company. The manufacturer will not be responsible for heaters that soot up due to improper meter
and gas line sizing resulting in improper gas volume, or heaters that are damaged in any way if connected to a
natural gas well.
PROPANE GAS:
All propane gas tanks must be located outdoors and away from pool/spa structure and in accordance
the standard for storage and handling of propane gas, ANSI/NFPA 58 (latest edition) and applicable local
codes. If the propane gas tank is installed underground, the discharge of the regulator vent must be above the
highest probable water level.
Propane tanks must have suffi cient capacity to provide adequate vaporization for the full capacity of the
equipment at the lowest expected temperatures. Consult a propane company expert for correct sizing.
Apply joint compound (pipe dope)
Figure 9: Gas Piping
Figure 10: Junction Box Cover
Gas
Inlet
Bonding
Lug
23
Supply
Voltage
Inlet
Low
Voltage
Inlet
with