RT-SVX24Q-EN
61
☐
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.
☐
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
)
☐
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.
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
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 44.
Condensate trap installation
1-1/4” NPT
female connection
Field supplied
condensate piping
Cleanout plug
Base rail
Note: Negative static pressure in coil section.
Pitch the drain lines at least 1/2 inch for every 10 feet of
horizontal run to assure proper condensate flow. Do
not allow the horizontal run to sag causing a possible
double-trap condition which could result in condensate
backup due to “air lock”.
Units with Gas Furnace
Units equipped with a gas furnace have a 3/4" CPVC
drain connection stubbed out through the vertical
support in the gas heat section. It is extremely
important that the condensate be piped to a proper
drain. Refer to the appropriate illustration in
for the location of the drain connection.
N
No
otte
e:: Units equipped with an optional modulating gas
furnace will likely operate in a condensing mode
part of the time.
Ensure that all condensate drain line installations
comply with applicable building and waste disposal
codes.
N
No
otte
e:: Installation on gas heat units will require
addition of heat tape to the condensate drain.
Removing Compressor Assembly
Shipping Hardware
Each manifolded compressor assembly is rigidly bolted
to a mounting rail assembly. The rail assembly is set on
six (6) rubber isolators. The assembly is held in place
by six (6) shipping “Tiedown” bolts. To remove the
shipping hardware, follow the procedures below:
1. Remove the bolt in each rubber isolator and the
slotted shipping spacer located between the
compressor rails and the unit base rail illustrated in
. Reinstall the bolts at the same
location by screwing them into the base rail two to
three turns only.
2. Ensure that the compressor rail assembly is free to
move on the rubber isolator.
Removing Supply and Exhaust Fan
Shipping Channels
Each supply fan assembly and exhaust fan assembly is
equipped with spring isolators. Shipping channels are
installed beneath each fan assembly and must be
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