Installation
Figure 21. Condensate trap installation
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.
Note: 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.
Note: 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
removed. To locate and remove these channels, refer to
and use the following procedures.
40
1-1/4" NPT
female connection
Field supplied
condensate piping
Cleanout plug
Spring Isolators
Spring isolators for the supply and/or exhaust fan are
shipped with the isolator adjusting bolt backed out. Field
adjustment is required for proper operation. shows isolator
locations. To adjust the spring isolators use the following
procedure.
1. Remove and discard the shipping tie down bolts but
leave the shipping channels in place during the
adjustment procedure. See .
2. Tighten the leveling bolt on each isolator until the fan
assembly is approximately 1/4" above each shipping
channel.
3. Secure the lock nut on each isolator.
4. Remove the shipping channels and discard.
O/A Sensor and Tubing Installation
An Outside Air Pressure Sensor is shipped with all units.
On VAV systems, a duct pressure transducer and the
outside air sensor is used to control the discharge duct
static pressure to within a customer-specified parameter.
On units equipped with 100% modulating relief with
Statitrac, a space pressure transducer and the outside air
sensor is used to control the relief fan and dampers to
relieve static pressure to within a customer-specified
parameter, within the controlled space.
Use the following steps and image to install the sensor and
the pneumatic tubing.
1. Remove the O/A pressure sensor kit located inside the
"ship with" item container. The kit contains the following
items:
a. O/A static pressure sensor with slotted mounting
bracket
b. 50 ft. 0.188 in tubing
c. Mounting hardware
2. Remove the two roof cap screws and install the
provided L mounting bracket as shown in the figure.
3. Place the sensor mounting slotted bracket to the L
mounting bracket with the slot located to the top.
4. Install the sensor vertically to the slotted bracket and
secure it with provided bolt and nut.
5. Connect one end of factory provided tubing to the top
port of sensor and pass it through the two slots in the
mount and the other end to the port in the base.
6. Secure the tubing with the mounting hardware located
in the ship with item container.
RT-SVX073A-EN
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