Trane Air Conditioner Unit Control Module UCM 42 Retrofit Model VAV User Manual

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  
VAV-IN-24  
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
VAV-IN-24  
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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  
5
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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
VAV-IN-24  
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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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