RT-SVX063E-EN
29
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
☐
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
constant volume controls as applicable.
☐
Complete the field wiring connections for the
variable air volume controls as applicable.
N
No
otte
e:: 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
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