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RT-SVX24Q-EN
☐ Seal air gaps around wiring and refrigerant tubing
through bulkhead.
☐ Side panels and top cover assembled between high
and low side.
☐ Verify line dampening weights are installed on each
discharge line.
Unit Rigging and Placement (Three-piece
unit) (in addition to two-piece unit
rigging and placement)
☐ Rail guide attached to evaporator section base rails.
☐ Evaporator section rigged and set onto roof curb,
aligned with supply end.
☐ Removed and discarded shipping protection panels
and top blockoffs from evaporator section.
☐ Removed side panels and roof cap from evaporator
section.
☐ Applied gasket and butyl tape as indicated in the
IOM.
☐ Removed and discarded shipping protection panels
and top block off from outside air section.
☐ Rigged and set outside air section onto roof curb to
within 2" of evaporator section.
☐ Using 0.75" x 24" threaded rod pull and secure
evaporator section and outside air section together.
☐ Using .375" bolts, nuts and washers pull and secure
the roof rails together.
☐ Installed roof splice plate.
☐ Added bullwrap to electrical wiring between
evaporator and outside air section.
☐ Connected power and control wiring between
evaporator and outside air section.
☐ Gasket applied and side panels installed on unit
split.
☐ Butyl tape applied on top of unit split along roof
seam and roof cap installed.
☐ Field Installed Control Wiring—Complete the field
wiring connections for constant volume or variable
air volume controls as applicable. Refer to “Field
Installed Control Wiring” for guidelines.
Main Electrical Power Requirements
☐ Verify that the power supply to the unit complies
with the unit nameplate specification. Refer to Main
Unit Power Wiring in the Installation chapter.
☐ Properly ground the unit.
☐ 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 1S2 toggle switch off to prevent accidental
unit operation.
☐ Turn on power to the unit.
☐ Press the STOP button on the Human Interface
(1U2).
☐ Verify that all compressor crankcase heaters are
energized for at least 8 hours prior to unit start-up.
IImmppoorrttaanntt:: Note: All field-installed wiring must comply
with NEC and applicable local codes.
Electric Heat Units
☐ Inspect the heater junction box and control panel;
tighten any loose connections.
☐ Check electric heat circuits for continuity.
☐ Two and Three piece units only) Route power
wiring to high side junction box.
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
PPrree--IInnssttaallllaattiioonn
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