General Unit Requirements; Main Electrical Power Requirements; Field Installed Control Wiring; Requirements For Electric Heat Units - Trane IntelliPak WEHE Series Installation, Operation And Maintenance Manual

Installation

General Unit Requirements

• The checklist listed below is a summary of the steps
required to successfully install a Commercial Rooftop
Air Handler unit. This checklist is intended to acquaint
the installing personnel with what is required in the
installation process. It does not replace the detailed
instructions called out in the applicable sections of this
manual.
• Check the unit for shipping damage and material
shortage; file a freight claim and notify Trane office.
• Verify that the installation location of the unit will
provide the required clearance for proper operation.
• Assemble and install the roof curb, including the
necessary gaskets. (Refer to the applicable sections in
the current edition of RT-SVN14*-EN for W_HE casings
2 through 9. Make sure the curb is level.
• Fabricate and install ductwork; secure ductwork to
curb.
• Rigging and placing the unit.
• Install and connect condensate drain lines to each
evaporator drain connection.
• Remove the shipping hold-down bolts and shipping
channels from the supply and exhaust fans (applicable
with rubber or spring isolators).
• Check all optional supply and exhaust fan spring
isolators for proper adjustment.

Main Electrical Power Requirements

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.
• Verify that the power supply complies with the unit
nameplate specifications.
• Inspect all control panel components; tighten any
loose connections.
• Connect properly sized and protected power supply
wiring to a field-supplied/installed disconnect and unit.
• Properly ground the unit.
Note: All field-installed wiring must comply with NEC
and applicable local codes.
30

Field Installed Control Wiring

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.
• Complete the field wiring connections for the constant
volume controls as applicable. Refer to "Field Installed
Control Wiring" for guidelines.
• Complete the field wiring connections for the variable
air volume controls as applicable. Refer to "Field
Installed Control Wiring" for guidelines.
Note: All field-installed wiring must comply with NEC
and applicable local codes.

Requirements for Electric Heat Units

All WEHE Units (380 minimum voltage)
• Verify that the power supply complies with the electric
heater specifications on the unit and heater nameplate.
• Inspect the heater junction box and control panel;
tighten any loose connections.
• Check electric heat circuits for continuity.
WEHE Units w/200V or 230V Electric Heat:
(Requires Separate Power Supply to Heater)
• Connect properly sized and protected power supply
wiring for the electric heat from a dedicated, field
supplied/installed disconnect switch to terminal block
4TB2, or to an optional unit mounted disconnect switch
4S15.

Requirements for Gas Heat

• Gas supply line properly sized and connected to the
unit gas train.
• All gas piping joints properly sealed.
• Drip leg Installed in the gas piping near the unit.
• Gas piping leak checked with a soap solution. If piping
connections to the unit are complete, do not pressurize
piping in excess of 0.50 psig or 14 inches w.c. to
prevent component failure.
• Main supply gas pressure adequate.
• Flue Tubes clear of any obstructions.
• Factory-supplied flue assembly installed on the unit.
• Connect the 3/4" CPVC furnace drain stubout to a
proper condensate drain.
RT-SVX35H-EN