O/A Sensor & Tubing Installation; Evaporative Condenser Make-Up Water And Drain Line Installation - Trane IntelliPak Installation, Operation And Maintenance Manual

O/A Sensor & Tubing Installation
An Outside Air Pressure Sensor is shipped with all units
designed to operate on variable air volume applications,
units equipped with a return fan, or constant volume units
with 100% modulating exhaust w/Statitrac.
On VAV systems, a duct pressure transducer (3U60) and
the outside air sensor is used to control the discharge duct
static pressure to within a customer-specified parameter.
On CV & VAV units equipped with 100% modulating
exhaust w/Statitrac, a space pressure transducer (3U62)
and the outside air sensor is used to control the exhaust
fan and dampers to relieve static pressure to within a
customer-specified parameter within the controlled space.
On units equipped with a return fan, a return pressure
transducer (3U106) is connected to the
O/A sensor for comparison with return plenum pressure.
Refer to Figure 29, p. 47 and the following steps to install
the sensor and the pneumatic tubing.
1. Remove the O/A pressure sensor kit located inside the
filter section.The kit contains the following items;
• O/A static pressure sensor with sensor mounting
• Bracket
• 50' of 3/16" O.D. pneumatic tubing
• Mounting hardware
2. Using two #10-32 x 1-3/4" screws provided, install the
sensor's mounting bracket to the factory installed
bracket (near the filter section).
3. Using the #10-32 x 1/2" screws provided, install the O/
A static pressure sensor vertically to the sensor
bracket.
4. Remove the dust cap from the tubing connector
located below the sensor in the vertical support.
5. Attach one end of the 3/16" O.D. factory provided
pneumatic tubing to the sensor's top port, and the
other end of the tubing to the connector in the vertical
support. Note that most of the tubing is not needed.
Discard any excess tubing.
Units with Statitrac:
6. Open the filter access door, and locate the pressure
transducer mounting plate illustrated in
There are three tube connectors mounted on the left of
the solenoid and transducers. Connect one end of the
field provided 3/16" O.D. pneumatic tubing for the
space pressurization control to the bottom fitting.
Route the opposite end of the tubing to a suitable
location inside the building.This location should be
the largest open area that will not be affected by
sudden static pressure changes.
Remove Evaporative Condenser Fan Shipping
Brackets
To remove shipping brackets
RT-SVX36K-EN
Important: Remove fan shipping brackets before
Evaporative condensers are shipped with fan shipping
brackets to reduce damage caused by vibration during
shipment.The fan shipping brackets must be removed
prior to unit startup.To remove the shipping brackets start
from the side opposite to the drain actuator (see
p. 131):
1. Loosen the screw for the bracket that holds the inlet
louvers below the door side.
2. Remove inlet louvers and set to the side.
Note: Service technician may need to step on the
horizontal surface of FRP coated base.
Step with care.
3. Unscrew the bolt in the middle of the door. Keep the
bolt in a safe place.
4. Lift one door with handle until it touches the top.
Swivel bottom of door to remove it from the door
opening and set it to the side.
5. Slide and remove the middle mist eliminator section
so that the shipping bracket is visible.
6. Use screw gun to unscrew the two screws that hold the
fan shipping bracket.The bracket should drop down
but still remain engaged with a hook on the bracket.
7. Go to the other side of the unit and follow the
procedure for inlet louver and door removal (see steps
1 - 6).
8. Hold the bracket with one hand and remove remaining
two screws.
9. Remove the bracket and all the removed screws from
the unit.
Important: Make sure there are no screws remaining in
10. Reinstall inlet louvers, mist eliminators and louvers.
Check that the direction of arrow on the inlet louver is
correct.
Evaporative Condenser Make-up Water
and Drain Line Installation
Figure 29.
Make-up Water and Drain Lines
Water Supply Source
The supply line should be designed to provide a minimum
supply of water within customary domestic supply
pressures, 35 to 60 psig; dynamic pressure (measured
with the valve open) which will allow approximately 30
GPM to enter the sump through the makeup water valve,
when the sump is empty.The unit uses about 2-4 GPM.
Attach a hand valve at the inlet for use during inspection
and maintenance; an inlet strainer is recommended as
well.
startup. Failure to remove brackets could
result in fan damage.
the coil area.
Installation
Figure 85,
45