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☐ Remove the shipping hold-down bolts and shipping
channels from the supply and relief /return fans with
rubber or spring isolators.
☐ Check all supply and relief/return fan spring isolators
for proper adjustment.
☐ Verify that all plastic coverings are removed from the
compressors.
☐ Verify all discharge line service valves (one per circuit)
are back seated.
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 variable
air volume controls as applicable.
Note: All field-installed wiring must comply with NEC and
applicable local codes.
Electric Heat Units
☐ 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.
☐ On SEH_L 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 from a dedicated, field- supplied/
installed disconnect to terminal block 3XD5, or to an
optional unit-mounted disconnect switch 3QB4.
Gas Heat (SFH_)
☐ 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.
RT-SVX072D-EN
☐ Factory-supplied flue assembly installed on the unit.
☐ LP (Propane) kit parts installed (if required).
☐ Connect the 3/4" CPVC furnace drain stubout to a
proper condensate drain. Provide heat tape or
insulation for condensate drain as needed.
Hot Water Heat (SLH_)
☐ Route properly sized water piping through the base of
the unit into the heating section.
☐ Install the factory-supplied, 3-way modulating valve.
☐ Refer to the schematic to complete the valve actuator
wiring.
Steam Heat (SSH_)
☐ Install an automatic air vent at the top of the return
water coil header.
☐ Route properly sized steam piping through the base of
the unit into the heating section.
☐ Install the factory-supplied, 2-way modulating valve
☐ Complete the valve actuator wiring.
☐ Install 1/2", 15-degree swing-check vacuum breaker(s)
at the top of each coil section. Vent breaker(s) to the
atmosphere or merge with return main at discharge
side of steam trap.
☐ Position the steam trap discharge at least 12" below the
outlet connection on the coil.
☐ Use float and thermostatic traps in the system, as
required by the application.
O/A Pressure Sensor and Tubing
Installation
(All units with Statitrac or return fans)
☐ O/A pressure sensor mounted to the roof bracket.
☐ Factory supplied pneumatic tubing installed between
the O/A pressure sensor and the connector on the
vertical support.
☐ Field supplied pneumatic tubing connected to the
proper fitting on the space pressure transducer located
in the filter section, and the other end routed to a
suitable sensing location within the controlled space
(Statitrac only).
Modulating Reheat (S_H_)
☐ Install space humidity and temperature sensors. Refer
to unit diagrams for guidelines.
Condensate Drain Connections
Each unit is provided with 1" evaporator condensate drain
connections (two on each side of the unit for FC supply
fans and one on each side of the unit for DDP supply fans).
Installation
31
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