Electric Heat Units (Wehe) - Trane IntelliPak WEHE Series Installation, Operation And Maintenance Manual

Installation
Figure 26. Disconnect switch external handle
Note: All field installed wiring must conform to NEC
guidelines as well as State and Local codes.
Verify that the power supply available is compatible with
the unit's nameplate ratings for all components. The
available power supply must be within 10% of the rated
voltage stamped on the nameplate. Use only copper
conductors to connect the 3-phase power supply to the
unit.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.

Electric Heat Units (WEHE)

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.
42
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
WEHE Casing 2 through 6 (20 - 75 Ton) electric heat units
operating on 200/230 volts require two power supplies as
illustrated in Figure 27, p.
with the optional factory mounted non-fused disconnect
switches, two field-supplied disconnect switches must be
installed at or near the unit. The power wires for the
electric heat is routed into the electric heat control panel
using the thru-the-base access provided in the heating
section. Refer to the appropriate unit base layout in
Figure 4, p. 19 - Figure 8, p. 23
locations and dimensional data.
W_HE Casings 2 through 6 (20 - 75 Ton) units operating on
460/575 volts and all Casing 9 units require one power
entry as illustrated in Figure
Use the information provided in
Electrical Service Sizing Equations (beginning on
determine the appropriate wire size and Maximum Over
Current Protection for the heaters/unit.
Note: Each power supply must be protected from short
circuit and ground fault conditions. To comply with
NEC, protection devices must be sized according to
the "Maximum Over current protection" (MOP) or
"Recommended Dual Element" (RDE) fuse size data
on the unit nameplate.
Provide grounding for the supply power circuit in the
electric heat control box.
44. Unless the unit was ordered
for the electrical entrance
27.
Table 11, p. 46 and the
p.
RT-SVX35H-EN
47) to