RT-SVX063G-EN
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General Installation
Requirements
The checklist below is a summary of the steps required to
successfully install a Commercial rooftop 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.
☐ Complete “Unit Inspection,” p. 11 checklist.
☐ Verify that the installation location of the unit will
provide the required clearance for proper operation.
☐ Assemble and install the roof curb. Refer to the current
edition of the roof curb installer’s guide.
☐ Fabricate and install ductwork; secure ductwork to
curb. Do not use the unit to support the weight of the
ducting.
☐ Install pitch pocket for power supply through building
roof. (If applicable).
Setting 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 condensate drain lines to each
evaporator drain connection.
☐ Remove the shipping hold-down bolts from the supply
fans.
☐ Check all supply fan spring isolators for proper
adjustment.
☐ Verify all discharge line service valves (one per circuit)
are back seated.
☐ Energize compressor crankcase heaters. Allow heaters
to operate for 8 hours prior to starting the refrigeration
system.
Main Electrical Power
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not
designed or qualified to accept other types of
conductors.
☐ Verify that the power supply complies with the unit
nameplate specifications. Refer to Main Unit Power
Wiring in the Installation chapter.
☐ 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.
☐ All field-installed wiring must comply with NEC and
applicable local codes.
Field Installed Control Wiring
☐ Complete the field wiring connections for the variable
air volume controls as applicable.
Note: All field-installed wiring must comply with NEC and
applicable local codes.
Electric Heat
☐ Verify that the power supply complies with the electric
heater specifications on the unit and heater nameplate.
☐ Inspect the heater terminal plate and control panel;
tighten any loose connections.
☐ Check electric heat circuits for continuity.
Units with 200V or 230V Electric Heat
Requires separate power supply to heater.
☐ Connect properly sized and protected power supply
wiring for the electric heat control box from a dedicated,
field supplied/installed disconnect to terminal block, or
to an optional unit-mounted disconnect switch.
☐ Ensure the disconnect cover is reinstalled after
connections are made.
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 and Burner Tubes are clear of any obstructions.
☐ Factory supplied rain shield installed over combustion
air inlet panel (40-75T units only).
☐ LP (Propane) kit parts or high altitude orifices installed
(if required).
☐ Factory-supplied flue assembly installed on the unit.
☐ Connect the 3/4" CPVC furnace drain stubout to a
proper condensate drain. Provide heat tape or
insulation for condensate drain as needed.
O/A Pressure Sensor and Tubing
Installation (All )
☐ Factory supplied pneumatic tubing installed between
the O/A pressure sensor and the connector on the the
outside air intake hood..
☐ (Units with StatiTrac) Field supplied pneumatic tubing
connected to the proper fitting in the main control box,
Installation
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