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22 Packaged Heat Pump • WC-IOM-7
Installation
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 nameplate.
• Verify that the installation location of the unit will provide the required
clearance for proper operation.
• 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.
• Rigging 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.
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.
Main Electrical Power Requirements
• 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 switch and to the main power terminal block
(HTB1) in the unit control panel.
• Install proper grounding wires to an earth ground.
Note: All field-installed wiring must comply with NEC and applicable local
codes.
Electric Heat Requirements
• 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.
Low Voltage Wiring (AC & DC) Requirements
• Install the zone thermostat, with or without switching subbase.