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RT-SVX073A-EN
☐ Inspect all control panel components and tighten any
loose connections.
☐ Connect properly sized and protected power supply
wiring to a field supplied/installed disconnect and the
unit (copper wiring only to the unit).
☐ Verify that phasing to the unit is correct (ABC).
☐ Turn the 1S1 fused switch inside the control panel off to
prevent accidental unit operation. Turn the 1S20 fused
switch inside the control panel on to power the
crankcase heaters.
☐ Turn on power to the unit.
☐ Verify that the controls remain powered off.
☐ Verify that all compressor crankcase heaters are
energized for at least eight hours prior to unit start-up.
Important: All field-installed wiring must comply with NEC
and applicable local codes.
Gas Heat Units
☐ 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" W.C. to prevent
component failure.
☐ Main supply gas pressure between 7" and 14" W.C.
☐ Flue Tubes clear of any obstructions.
☐ Factory-supplied flue assembly installed on the unit.
☐ Connect the 3/4" CPVC furnace drain stub-out to a
proper condensate drain.
☐ Install field provided heat tape to furnace drain line.
Hot Water Heat
☐ Route properly sized water piping through the base of
the unit into the heating section.
☐ Install the factory-supplied, 3-way modulating valve.
☐ Complete the valve actuator wiring.
Steam Heat
☐ 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
☐ 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 base
rail.
☐ (Units with Relief/Return fans)Field supplied pneumatic
tubing connected to the proper fitting on the space
pressure transducer located in the return control panel,
and the other end routed to a suitable sensing location
within the controlled space.
Energy Recovery Wheel
☐ Verify that the wheel turns freely though a full rotation.
☐ Confirm that all wheel segments are fully engaged in
the wheel frame and that the segment retainers are
completely fastened.
☐ Confirm the seal adjustment and proper belt tracking on
the wheel rim.
Pre-Installation
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