Installation and Maintenance Manual

8 UV-SVN02C-EN
General Information
Unit Description
Configuration. This classroom unit ventilator is
configured in a horizontal (ceiling mount) configuration.
The units range from 750 cfm to 2000 cfm for the
horizontal configuration.
Cabinet. The units are constructed of 14- and 16-gauge
zinc coated steel. All steel surfaces are cleaned,
phosphatized, rinsed and dried before application of final
finish paint. The paint is applied by an electrostatic powder
spray system, minimum thickness of 1.5 mil which results
in an appliance grade finish.
Front Panels. The front panels are retained by Allen
wrench operated locks which open with a 180-degree
rotation.
The bottom panel is constructed of heavy gauge material.
End Pockets. Unit Ventilators are equipped with end
pockets to provide field installation of valves, piping, and
controls. The units have a large pipe access opening in
both end pockets and large knockouts for piping and
electrical connections. All electrical connections are made
in the left-hand end pocket, with exception of units
equipped with the electric heating coil option.
Drain Pan. The drain pan is positively sloped in all planes
to assure proper drainage and help eliminate the risk of
microbial growth. To help ensure indoor air quality, the
drain pan is insulated on the bottom to help prevent
condensate formation. The drain pan can be easily
removed for cleaning purposes. The drain pan is drilled-
out and pitched toward the cooling coil connection during
assembly per model number selection.
Fanboard. The fanboard assembly is acoustically
designed in a single, rigid assembly that includes the fans,
fan housing, bearings, fan shaft and motor. The fan motor
is mounted on the fanboard. The fanboard is made from
14-gauge galvanized steel to resist corrosion and increase
strength.
Electrically Commutated Motor (ECM). All motors
are brushless DC (BLDC)/electronically commutated
motors (ECM) factory-programmed and run-tested in
assembled units. The motor controller is mounted in a
control box with a built-in integrated user interface and
LED tachometer. If adjustments are needed, motor
parameters can be adjusted through momentary contact
switches accessible without factory service personnel on
the motor control board.
Motors will soft-ramp between speeds to lessen the
acoustics due to sudden speed changes. Motors can be
operated at three speeds or with a field-supplied variable
speed controller. The motor will choose the highest speed
if there are simultaneous/conflicting speed requests.
All motors have integral thermal overload protection with
a maximum ambient operating temperature of 104°F and
are permanently lubricated. Motors are capable of starting
at 50 percent of rated voltage and operating at 90 percent
of rated voltage on all speed settings. Motors can operate
up to 10 percent over voltage.
Filter. Standard units are equipped with a single 1-inch
thick filter (MERV 8) that is accessible without removal of
the unit front panel. Filter options include throwaway,
MERV 8 and MERV 13 options.
OA/RA Damper. Trane unit ventilators are equipped
with dual blade type mixing damper to ensure proper
modulation and mixing of return and outdoor air designed
in accordance to ARI 840. A splitter is placed between the
damper blades to separate the fresh-air and return-air
compartments to prevent draft blow-through.
Options
OA/RA Actuator (Option). The OA/RA actuator
provides true spring return operation for positive close-off
of the OA/RA damper. The spring return system of the
actuator closes the outside damper if power is lost to the
building. When ordered with factory mounted controls,
the actuator is 3-point floating. A 2 to 10 Vdc actuator is
also available when other than Trane controls is required.
See Ta b l e 1 , p . 8 for technical data of the OA/RA actuator.
Table 1. Technical data for OA/RA actuator
Power Supply 24 Vac ±20% 50/60Hz
24 Vac ±10%
Power Running: 2.5W
Consumption Holding: 1W
Transformer Sizing 5VA (class 2 power source)
Overload Electronic throughout
Protection 0- to 95-degree rotation
Control Signal 2–10 Vdc 3 point floating w/ Trane controls
Rotation Angle 95-degree max. Adjustable w/mechanical stop
Torque 35-inch/lb
Rotation Direction Spring return reversible w/CW/CCW mounting
Position Indication Visual indicator, 0- to 95-degrees
Noise Level Running: 30dB
UV-SVN02_-EN.book Page 8 Thursday, January 24, 2013 4:48 PM