General Unit Requirements; Factory Installed Economizer; Temperature Limit Switch Usage For Electric Heat Units; Horizontal Discharge Conversion Wsc036E, Wsc048E (3 - 4 Ton Units) - Trane WSC036E Installation, Operation And Maintenance Manual

Figure 22. Fork lift pockets (all heat pump units except
WSC120)
Figure 23. Fork lift pockets (WSC120)
NOTICE
8. Downflow units; align the base rail of the unit with the
curb rail while lowering the unit onto the curb. Make
sure that the gasket on the curb is not damaged while
positioning the unit.

General Unit Requirements

The checklist listed below is a summary of the steps
required to successfully install a commercial 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 appropriate
sales representative.
• Verify correct model, options and voltage from unit
nameplate.
• Verify that the installation location of the unit will
provide the required clearance for proper operation.
RT-SVX23F-EN
• Assemble and install the roof curb (if applicable). Refer
to the latest edition of the curb installers guide that
ships with each curb kit.
• Fabricate and install ductwork; secure ductwork to
curb.
• Rig the unit.
• Set the unit onto the curb; check for levelness.
• Ensure unit-to-curb seal is tight and without buckles or
cracks.
• Install and connect a condensate drain line to the
evaporator drain connection.
Note: Condensate Overflow Switch (if equipped) will not
work if unit is not level or slightly sloped toward
switch.

Factory Installed Economizer

• Ensure the economizer has been pulled out into the
operating position. Refer to the economizer installers
guide for proper position and setup.
• Install all access panels.
Temperature Limit Switch Usage for
Electric Heat Units
Units are factory shipped in the downflow discharge
configuration but can be field converted to a horizontal
discharge configuration. Some, but not all units require a
differentTCO-A limit switch, which is wire tied near the
terminal block in the heater compartment if horizontal
discharge configuration is used. See
the location ofTCO-A.
Horizontal Discharge Conversion
WSC036E, WSC048E (3 - 4 Ton Units)
Note: 3 - 4 ton units supply cover to supply opening and
return cover to return opening.
• Supplies Needed by Installer for Conversion: 3 oz. tube
of HighTemperature RTV sealant. (500°F/260°C:
Similar to Dow Corning 736)
Important: Failure to use recommended sealant could
result in unit performance loss.
If a unit is to be converted to a horizontal discharge, the
following conversion must be performed:
1. Remove RETURN and SUPPLY duct covers.
2. Locate supply cover. Apply ¼ in. (6mm.) continuous
bead of 500°F RTV sealant to the flange as shown in
Figure 24, p. 24.
Installation
Figure 29, p. 25 for
23