Electrical Connections - Trane TR250 Service & Installation Manual

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ELECTRICAL CONNECTIONS:

The heater is equipped with a hot surface ignition control system that automatically lights the burners.
An external power supply is required to power the control system. The electrical specifi cations for this heater
are 120/204 VAC, 60Hz, 1-phase, 5.5A maximum current. It is recommended that circuit protection for the
heater circuit be rated at 15 Amperes.
The heater is shipped from the factory wired for use with 240 VAC, 60 Hz fi eld power supply. To convert
the heater to 120 VAC, 60 Hz operation remove the 240 VAC voltage selector jumper from the ignition con-
trol board and replace it with the 120 VAC jumper. These jumpers are tie-wrapped together and are located
on the fuse board. See Figure 21 for location of the fuse board. All wiring connections to the heater must be
made in accordance with the latest edition of the National Electrical Code ANSI/NFPA 70, unless local code
requirements specify otherwise. In Canada, follow CSA C22.1 Canadian Electrical Code, Part 1.The heater
must be electrically grounded and bonded in accordance with local codes or, in the absence of local codes,
with National Electrical Code, ANSI/NFPA 70. The heater may be installed with the electrical service and
remote control entering the heater cabinet on either the left or right sides of the heater. The heater is equipped
with (4) openings for electrical entry. Any unused openings must be plugged (these are supplied). Field power
wiring connections are to be made to the terminal block located in the upper compartment inside the junction
box (see Figure 18). The heater has 2 junction boxes (one on each side of the heater). Only one junction box
should be used for fi eld power wiring.