RT-SVX073A-EN
39
☐ Remove the shipping hold-down bolts and shipping
channels from the supply and relief fans with spring
isolators.
☐ Check all supply and relief fan spring isolators for
proper adjustment.
☐ 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 as shown on the
unit schematics.
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.
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 Tubes clear of any obstructions.
☐ 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.
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.
☐ Refer to the schematic to 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
(All VAV units and all units with Statitrac, see Figure 22, p.
41)
☐ 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.
☐ 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.
Condensate Drain Connections
Each unit provides one 1-1/4" evaporator drain connections
on each side of the unit.
Due to the size of these units, all condensate drain
connections must be connected to the evaporator drain
connections.
Refer to Detail A in Figure 1, p. 15 for the location of these
drain connections.
A condensate trap must be installed due to the drain
connection being on the “negative pressure” side of the
fan. Install the P-Traps at the unit using the guidelines in
Figure 1, p. 15.
Installation
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