Trane BAY24X042, Installation Instructions Manual

Page: 11 / 24

Installation
ACC-SVN67M-EN 11
16. In the unit control box, route the wires along the existing
harness to contactor CC1. Secure wires to existing
harness.
17. Locate the low voltage wire harness with polarized plug in
the electric heater section compartment. Remove the
factory installed jumper. Connect the low voltage polarized
plug from the unit to the polarized plug on the electric
heater assembly.
18. Wire the heater element assembly to the electric heater
control panel according to the wiring diagram attached to
the electric heater control panel door.
19. Secure the green ground wire from the electric heat control
panel to the right hand wall of electric heater compartment
with star washer and #10 grounding screw.
20. Wire W1, W2 and W3 wires to CC1 according to the wiring
diagram attached to the unit control panel door.
21. Route single point power entry wires through the front
access opening of the support panel adjacent to the
electric heater section compartment. Using good
installation practices, provide strain relief for high voltage
wires where necessary. See
Figure 8 or Figure 9 .
22. Wire according to the wiring diagram attached to the
electric heater control panel door. Ground unit at grounding
lug provided on electric heater control panel assembly.
Important: After heater is installed and before applying
power, verify that heating elements are not
damaged or pinched and that heating elements
are not short circuited to each other or to the
heater frame or equipment cabinet by doing the
following: Test every heater element with
ohmmeter and verify that heater element
terminals are electrically isolated from cabinet
and ground (infinite resistance). On downflow
units with or without duct work installed or
horizontal units without ductwork installed,
remove horizontal supply cover and carefully
inspect elements after installation for damage or
proximity to supporting structure or cabinet. At
least 1/4 inch clearance is required around
electric heater coils.
Important: Be sure to check tightness of all terminal
connections, clamps, screws, etc., as these may
have become loose in shipment. Retighten all
electrical connections after equipment has been
in operation and components have reached
operating temperature.
23. Install the magnets into the door as seen in Figure 8 or
Figure 9 . Magnets should lock into place once installed.
Close electric heater control panel access door, replace
heat section access panel and unit control box access
panel. Replace horizontal supply cover. Be careful when
replacing cover and make sure gasketing is not torn or
missing. Gasket must make water tight seal.
24. Scratch out the square on unit nameplate showing heater
model installed in 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.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. 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/national electrical codes.