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VAV-IN-24 5
WARNING
Hazardous Service
Procedures!
The maintenance and Trouble
Shooting procedures recommend-
ed in this section of the manual
could result in exposure to electri-
cal, mechanical or other potential
safety hazards. Always refer to
the safety warnings provided
throughout this manual concern-
ing these procedures. When possi-
ble, disconnect all electrical
power including remote discon-
nects and discharge all motor
start/run capacitors before servic-
ing. Follow proper lockout/tagout
procedures to ensure the power
can not be inadvertently ener-
gized. When necessary to work
with live electrical components,
have a qualified licensed electri-
cian or other individual who has
been trained in handling live elec-
trical components perform these
tasks. Failure to follow all of the
recommended safety warnings
provided, could result in death or
serious injury.
WARNING
Hazardous Voltage!
Disconnect all electric power, in-
cluding remote disconnects and
discharge all motor start/run ca-
pacitors before servicing. Follow
proper lockout/tagout procedures
to ensure the power can not be in-
advertently energized. Failure to
disconnect power before servic-
ing could result in death or seri-
ous injury.
Pre-Installation
The existing unit controls will require
removal prior to installing the UCM 4.2
retrofit kit. This includes pneumatic ac-
tuators, volume regulators and any
miscellaneous auxiliary controls.
The communications power and zone
sensor wiring should be pulled to the
unit. The wiring procedures and
guidelines used are outlined in the
VAV-SVX01C-EN manual.
CAUTION
Local and N.A.C. electrical codes
should be observed when install-
ing the UCM 4.2 retrofit kit.
Control Box Mounting
The next phase is to begin the installa-
tion of the kit. The controller should be
mounted at any convenient location
on the existing unit. Keep in mind the
controller must be mounted in a verti-
cal plane to the flow transducer will
function properly. In a typical installa-
tion, the controller is mounted on one
side of the unit, and the actuator on
the other side due to space limitations.
However, Trane’s controller may be
mounted on the ductwork adjacent to
the terminal unit. The only require-
ment is the flow sensor tubing cannot
exceed 10-feet.
Actuator Installation
When installing the actuator, the con-
vention of the damper rotation is as-
sumed as:
• Clockwise rotation of the damper
shaft will close the damper.
• Counterclockwise rotation of the
damper shaft will open the damper
All of the wiring diagrams assume this
convention, Figure 1.
WARNING
Hazardous Voltage!
Disconnect all electric power, in-
cluding remote disconnects and
discharge all motor start/run ca-
pacitors before servicing. Follow
proper lockout/tagout procedures
to ensure the power can not be in-
advertently energized. Failure to
disconnect power before servic-
ing could result in death or seri-
ous injury.
Actuator Installation
To install the actuator, slip the actuator
over the shaft of the damper and use a
sheet metal screw to secure the actua-
tor to the base of the terminal unit. Ro-
tate both the actuator and damper
shaft fully clockwise and ensure that
the damper is fully closed. When the
damper is fully closed, tighten the set
screws of the actuator onto the damp-
er shaft.
When following the clockwise-closed
convention, wiring terminations for
the actuator are shown in Table 1.
Table 1:
The actuator is now configured for
clockwise operation (with the actuator
closing the damper). If the damper is a
90° rotating damper, the actuator will
close the damper.
Note: If the damper angle of rotation is
counterclockwise to close, follow the
above procedure except reverse the
open and closed wires at the actuator
terminal block.
UCM 4.2 Actuator Color Code Function
TB4-1 COM White Hot
TB4-2 CCW Black Open
TB4-3 CW Red Closed
Installation