Installation
Unit Control Module (UCM) 4.2 Retrofit
Model VAV
Models
“A” and later Design Sequence
VAV
July 2005
VAV-IN-24
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Contents
Installation/Startup/Commissioning
2
2
2
4
5
6
Notice/Introduction
Application
Hardware
Installation
Commissioning
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3
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Hardware
UCM 4.2 Retrofit Kit
The UCM 4.2 retrofit kit is available in
three basic kits.
Control Assembly
The actual control assembly consists
of UCM and Delta P transducer mount-
ed in a sheet metal enclosure. The ac-
cessories offered with the kit are zone
sensors with the same options as
Trane DDC/VAV: flow bars for use with
units without a flow sensor and con-
trol power transformers.
• Retrofit Kit with a Honeywell
actuator
• Retrofit Kit with a Belimo actuator
• Retrofit Kit with no actuator
The kit may also be ordered in a pres-
sure dependent version on a special
basis. Both the Belimo and Honeywell
actuators are direct coupled actuators.
Honeywell Actuator
Key benefits and features of the Hon-
eywell actuator are:
• Selectable 45°, 60°, and 90° angles
of rotation
• 35-inch-pound torque capacity
• 3/8-inch to 1/2-inch shaft size capa-
bility
• 90-second drive time over 90° rota-
tion
• Magnetic coupled motor provides
45-inch-pounds stall
• 2 VA at 24-volts power consumption
• Manual clutch to disengage the ac-
tuator from the motor
Belimo Actuator
The Belimo actuator’s principle benefit
is flexibility. Belimo is designed with
the following features:
• Direct coupled with universal clamp
fitting shaft sizes, 3/8-inch to 1/2-
inch shaft size.
• Manual clutch to disengage the ac-
tuator from the motor
• Motor reversing switch to change
rotation
• Adjustable mechanical stops
• 35-inch-pounds torque capacity
• 3 VA at 24-volts power consumption
• 95-second run time
4
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Installation
CAUTION
WARNING
WARNING
Local and N.A.C. electrical codes
should be observed when install-
ing the UCM 4.2 retrofit kit.
Hazardous Service
Hazardous Voltage!
Procedures!
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.
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.
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
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.
Actuator Installation
When installing the actuator, the con-
vention of the damper rotation is as-
sumed as:
When following the clockwise-closed
convention, wiring terminations for
the actuator are shown in Table 1.
Table 1:
UCM 4.2
•
Clockwise rotation of the damper
shaft will close the damper.
WARNING
Actuator Color Code Function
TB4-1
COM
CCW
CW
White
Black
Red
Hot
Hazardous Voltage!
•
Counterclockwise rotation of the
damper shaft will open the damper
TB4-2
Open
Closed
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.
TB4-3
All of the wiring diagrams assume this
convention, Figure 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.
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.
VAV-IN-24
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Commissioning
Figure 1: UCM 4.2 Wiring Diagram
Commissioning
For commissioning and configuration,
contact the local Trane service techni-
cian, or refer to VAV-SVX01C-EN.
6
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Commissioning
Figure 2: Sensor signal vs. airflow delivery
5
1
5"
6"
8"
10" 12" 14" 16"
4"
0.1
0.01
10
100
1,000
10,000
Cfm
Note:
Refer to manufacturer of competitive terminal for Delta P vs. airflow delivery.
VAV-IN-24
7
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Literature Order Number
File Number
VAV-IN-24
SV-TD-000-VAV-IN-24-0705
SV-TD-000-VAV-IN-24-0693
Inland
Supersedes
Trane
Stocking Location
A Business of American Standard Companies
Trane has a policy of continuous product and data improvement and reserves the right to change
design and specifications without notice.
For more information, contact your local district
office or e-mail us at [email protected]
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