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©American Standard Inc. 1999

VAV-SVX01B-EN

Chapter 1 – General Information

4

UCM Control Module 4.0 (UMC 4.0)
Specifications
UCM 4.0 Enhancements
UCM 4.0 Features
Shipping
Storage

Chapter 2 – VAV Start-Up/Check-Out Procedure

6

Pre-power Up Checkout for the UCM 4.0
UCM Operational LEDs
Zone Sensor Checkout

Chapter 3 – UCM 4.0 Installation and Wiring

7

UCM 4.0 Power Wiring
Zone Sensor Wiring
Communication Wiring
DIP Switch Settings

Chapter 4 – UCM 4.0 Programming and Operation

14

Typical UCM Operating Behavior
UCM Status
UCM Set Points
UCM Setup

Chapter 5 – Sequence of Operations

24

Single Duct Units
Parallel Fan-Powered Units
Series Fan-Powered Units
Zone Sensor Ffunctions
Flow Sensor
Failure Modes

Contents

Summary of Contents for UCM 4.0

Page 1: ...Installation Operator Programming UCM 4 0 and WirelessVAV Communication VAV SVX01B EN May 2001 ...

Page 2: ...e UCM 4 0 UCM Operational LEDs Zone Sensor Checkout Chapter 3 UCM 4 0 Installation andWiring 7 UCM 4 0 PowerWiring Zone SensorWiring CommunicationWiring DIP Switch Settings Chapter 4 UCM 4 0 Programming and Operation 14 Typical UCM Operating Behavior UCM Status UCM Set Points UCM Setup Chapter 5 Sequence of Operations 24 Single Duct Units Parallel Fan Powered Units Series Fan Powered Units Zone Se...

Page 3: ...B EN 3 Contents Chapter 6 Air andWater Balancing 28 Air Balancing Water Balancing Chapter 7 WirelessVAV Systems 30 Chapter 8 T rouble Shooting 38 UCM 4 0 Problems Wireless Receiver Problems Chapter 9 Appendix 42 ...

Page 4: ...er Specifications Power Requirements The UCM 4 0 requires 24VAC 50 60 Hz and up to 50VA depending on the number of heat outputs stages which consume 10VA each Operating Environments UCM 4 0 0 140 F 0 60 C 10 to 90 relative humidity non condensing Storage Environments UCM 4 0 40 150 F 40 65 6 C 10 to 90 relative humidity non condensing Mounting Typically the UCM 4 0 is factory installed However UCM...

Page 5: ...t Calibration If there is a discrepancy between a measured temperature and what the UCM reports a calibration offset value can be edited in the UCM setup screen to correct the displayed value Flow Sensor Calibration If there is a discrepancy between a measured flow and what the UCM reports the measured value can be entered which automatically calculates a calibration multiplier to correct the disp...

Page 6: ...On Board functioning correctly Blinking Board malfunction Replace Board Off Board does not have power The yellow LED functions as the communication indicator The indication from the yellow LED is as follows Table 2 Yellow LED Communication Indicator Function LED State Indication On Incorrect reversed communication polarity no connection or shorted lines Blinking slowly Communication is occurring o...

Page 7: ...7 UCM 4 0 Installation andWiring Figure 2 Wiring Diagram for Single Duct Units with Field Installed Re heat Figures 2 5 show wiring diagrams for typical applications of UCM 4 0 CHAPTER 3 UCM 4 0 INSTALLATIONANDWIRING ...

Page 8: ...8 VAV SVX01B EN UCM 4 0 Installation andWiring Figure 3 Wiring Diagram for Single Duct Units with Factory Installed Electric Re heat ...

Page 9: ...VAV SVX01B EN 9 UCM 4 0 Installation andWiring Figure 4 Wiring Diagram for Fan Powered Units with Field Installed Re heat ...

Page 10: ...10 VAV SVX01B EN UCM 4 0 Installation andWiring Figure 5 Wiring Diagram for Fan Powered Units with Factory Installed Electric Re heat ...

Page 11: ...ining magnetic contactors with three stages of reheat would consume 42VA NOTE VariTrane andVariTrac cooling only Series D and E models consume 20VA 12VA for the actuator and 8VA for the board The heating output ratings remain the same Refer to Figure 1 for UCM terminal locations Zone SensorWiring Location and Mounting A zone sensor in each control zone should be located in the most critical area o...

Page 12: ... the following requirements 1 All wiring must be in accordance with the National Electrical code and local codes 2 Communication link wiring must be at least 18AWG twisted shielded pair wire Shields must be grounded at the Tracer Summit or Central Control Panel CCP only More than one ground reference will cause communications failures Shields must be daisy chained Tape the shield at the lastVAV UC...

Page 13: ...N 18 82 ON OFF ON ON OFF ON 19 83 OFF OFF ON ON OFF ON 20 84 ON ON OFF ON OFF ON 21 85 OFF ON OFF ON OFF ON 22 86 ON OFF OFF ON OFF ON 23 87 OFF OFF OFF ON OFF ON 24 88 ON ON ON OFF OFF ON 25 89 OFF ON ON OFF OFF ON 26 90 ON OFF ON OFF OFF ON 27 91 OFF OFF ON OFF OFF ON 28 92 ON ON OFF OFF OFF ON 29 93 OFF ON OFF OFF OFF ON 30 94 ON OFF OFF OFF OFF ON 31 95 OFF OFF OFF OFF OFF ON 32 96 ON ON ON ON...

Page 14: ...e control algorithm to close the valve in response to zone temperature and set points If the minimum flow set points are being enforced the valve will position itself at a percentage equivalent to the minimum flow set point MorningWarm Up Tracer Summit places the UCM in heat mode and drives the UCM to maximum flow The AHU system fan is turned on and the UCM operates in pressure independent mode an...

Page 15: ...ngeover and the heating setpoint supply air temperature supply air temperature heating setpoint eating setpoint supply air temperature or auxiliary temperature or auxiliary temperature or auxiliary temperature is below 70o F Local is below 70o F Local is below 70o F Local hot water reheat is hot water reheat is hot water reheat is always available to always available to always available to keep th...

Page 16: ...to unoccupied is generated The maxi mum flow and unoccupied overrides are held until the thumbwheel is moved into the normal operating region Note If the thumbwheel is not enabled locally generated overrides or are not possible Local Occupancy detector Local occupancy detection was added with UCM4 on inputTB4 1 TB4 1 is a 24 VAC input operated in a negative logic mode wherein the absence of signal...

Page 17: ... position is 0 If position control is being used the sensed flow is replaced with the valve position The Z factor may then be used by BAS equipment to satisfyASHRAE 62 89 and calculate the outside air flow set point IAQ Set Point Modification Ventilation rate change for IAQ pur poses is accomplished by setting the active minimum flow set point to the edited cooling minimum flow set point IAQ multi...

Page 18: ...CM status display appears as follows UCM Programming and Operation Following are descriptions of each line on the UCM status screen ZoneTemperature This line displays the temperature as recorded by the zone sensor If the zone sensor has failed this line will read FAIL Active Cooling Set Point andActive Heating Set Point These set points are the active actual cooling and heating set points currentl...

Page 19: ...sor Software Revision This line shows the version of the UCM firmware that is being used The following lines will only appear if the condition exists UCM Memory Failure This text will be displayed if the UCM s EEPROM has failed Calibrating This will be displayed if the UCM is calibrating The UCM will calibrate after a power up or as commanded by an ICS device Control Offset Active This line will b...

Page 20: ...l Offset has a range of 0 5 F 0 2 8 C When Control Offset is active this value will be added to the edited occupied cooling set point and subtracted from the edited occupied heating set point to determine the active set points Note The control offset value will not effect a zone sensor thumbwheel set point Fan Control Set Point The entry on this line determines when a parallel fan will be turned O...

Page 21: ...the unit has a series fan and only indicates if the parallel fan has been disabled The UCM may lockout the fan on its own if any of the following apply control action HEAT flow override to drive OPEN CLOSE or MAX or if the zone temperature sensor has failed NOTE This line will not appear if the unit does not have a fan BIP Configuration Default is Generic The BIP Configuration interface is for dry...

Page 22: ...UCM will add the offset to the value being read by the UCM s auxiliary temperature sensor For example if the auxiliary temperature sensor is indicat ing that the temperature is 74 F 23 3 C and the auxiliary temperature calibra tion offset is 1 5 F 0 8 C the actual temperature used by the UCM and reported to the ICS will be 72 5 F 22 5 C Wired ZoneTemperature This is the temperature being reported ...

Page 23: ... being used The sensor type can be selected as either Thermistor or RTD Note Factory supplied sensors areThermistors Wired Sensor Use This input determines the function of the wired zone temperature sensor SelectAveraged to use the sensor as part of a wired system OR to use the sensor as an averaging sensor in a wireless system Average will use the sensed temperature in the temperature averaging c...

Page 24: ...ction can be enabled If enabled the unit will perform a recalibration Sequence Of Operations Single Duct Units When the UCM control action is COOL the UCM controls the modulation of the air valve as a cooling source to main tain the active cooling set point Airflow is varied between the minimum and maximum flow set points to maintain temperature set points A PI control algorithm is utilized to min...

Page 25: ...ed Heat Control Override Heat control can be disabled locking out heat outputs Fan Control Override Fan control can be disabled locking out both fan and heat outputs This affects only parallel fan powered units Control Offset Control Offset may be enabled which adjusts the edited cooling and heating set points Recalibrate Reset The recalibrate function can be enabled Series Fan Powered Units Occup...

Page 26: ... be maintained for two minutes When a CANCEL button on a zone sensor module is pressed for at least two seconds the UCM must set aTOV cancel signal clear theTOV signal if it is set and set the timed override timer to zero Pressing any zone sensor module s ON or CANCEL button will not affect the zone temperature reported from the UCM Note TOV pushbuttons should be pressed for at least 2 seconds and...

Page 27: ...trol the zone temperature If a flow sensor has failed it is periodically checked for proper operation If found to be operating properly the UCM will be switched to the standard pressure independent control Otherwise position control is used as long as the flow signal remains out of range LocalThermostat Set Point Failure Failure of a local thermostat set point adjustment potentiometer will cause t...

Page 28: ...ual branch duct open all theVAV units in that branch duct to the maximum cooling position This can be done using EveryWare by giving each UCM a Drive Max command or by rotating the Zone sensor set point knob to the position and hold theTOV ON button for two seconds The damper will remain at its maximum set point until the zone sensor knob is moved back into the normal operating range B Read airflo...

Page 29: ...ing the correct CFM 8 Upon completion of theVAV air balancing Remove all overrides Initiate a recalibrate command Air Balancing and Water Balancing Water Balancing EachVAV UCM can have its hot water valve overridden to drive fully OPEN 2 position and proportional This can be done in the UCM setup menu and can be used to assist in water balancing 1 Log on to the UCM with EveryWare software 2 Select...

Page 30: ...ensor to a UCM their temperature readings are averaged This gives the ability to get a more accurate sample of WirelessVAV Systems Chapter Overview This chapter describes the wireless zone sensor system including system layout component functionality and specifications a large space supplied by oneVAV box It also provides better control when 1 VAV box serves multiple zones such as small offices Un...

Page 31: ...acell 123A Wireless Receiver Mounting The receiver will work best if mounted below the ceiling grid with the antennae pointing down The receiver is to be hung from the roof structure like a light fixture A hook on the back is provided for connection of a chain A threaded nipple is provided for attaching a handy box when the wiring must be run in conduit Ideally the receiver should be located an eq...

Page 32: ... RF signals to its assigned receiver Wireless Receiver The receiver is designed for use in a temperature control system operating in conjunction with wireless zone sensors which are installed in areas where temperature control is to be maintained The receiver functions as a communications translator between the spread spectrum radio communica tions and theVAV communications link As a Spread Spectr...

Page 33: ...receivers may reside on a Communication Link when using aTracer Summit DIP switches 6 and 7 are not used and should be set to their ON position DIP switch 8 is the setup normal switch and is only used when the unit is being assigned sensors using the set up tool When assigning zone sensors to the receiver using the set up tool set DIP switch 8 to the Off Down position During normal operation DIP s...

Page 34: ...elect the Devices tab 5 Highlight the BCU to be modified and select the Create UCM Editor See Figure 8 6 Select the Non Isolated link which has the receiver connected to it See Figure 9 7 Change the UCMType fromAbsorption Chiller UCP2 toWireless Receiver See Figure 9 8 Give the receiver a unique name address and specify how many receivers are going to be added to the network See Figure 9 9 Click t...

Page 35: ...er summary will include all sensors from which the receiver is receiving information and should look like the following Figure 9 Create UCM s Dialog Time Since Last Zone Sensor Receiver Signal Zone Transmission SN Strength Indicator Temp seconds 1 00004F 125 75 4 120 2 000017 135 71 5 30 3 00005F 75 76 2 200 4 0000163 140 73 8 170 5 00004B 110 72 0 100 6 00014A 120 70 6 90 Notes 1 Average will use...

Page 36: ...base See Figure 11 9 Repeat steps 5 through 8 to add additional sensors You may add up to four 4 Average Zone Sensors per VAV UCM 10 Once complete press the exit button to return to the UCM editor 11 Click the Save button to save the changes to the UCM Notes 1 Average will use the sensed temperature in the temperature averaging calculation If this is the only sensor the average will be the sensed ...

Page 37: ...e setup mode 2 To setup the sensor remove the front cover of the zone sensor insert the plug into the keyed socket at the bottom of the circuit board The display reads Trane SetupTool PressAny Key Pressing any key produces the following display UCM Address 00 AddAverage 1 To assign the sensor as an averaging sensor to a specific UCM enter the UCMAddress 1 63 and press send The receiver will beep 3...

Page 38: ... and remove the communication link from the secondVAV box 2 Communication wiring error shorts open or reversed polarity Remove the communication link past the firstVAV box and verify the polarity Check resistance across the communication wires for possible shorts or open circuitry 3 UCM has no power Check the green power LED and check the 24 voltsAC supply atTB1 on the UCM board Voltage should be ...

Page 39: ...verrides 5 A flow override exists locking out the fan heat outputs Check group global and orTracer overrides 6 Outputs on the UCM are configured as normally closed Verify the output configuration in the UCM setup menu 7 Zone temperature is at or above the heating set point Increase the UCM heating set point In the event that the air valve is not modulating properly inspect the following 1 Tracer S...

Page 40: ...ood and are properly seated in the holders In normal use the green LED will flash each time the zone sensor transmits a message usually several minutes apart Checking Receiver Operation This check should be performed after all zone sensors for the receiver have been installed When power is applied check the operation of the three LED s on the receiver as follows Green LED Power Indicator Indicates...

Page 41: ... least at eye level to reduce the effects of drafts created by people walking by What if I have other wireless systems such as for security systems or telephones Can they interfere TraneWirelessVAV Systems apply spread spectrum technology to accomplish wireless communication Spread spectrum technology enhances system security and allows the system to operate in the same environment as other system...

Page 42: ...ally Erasable Programmable Read Only Memory o F Fahrenheit Hz Hertz ICS Integrated Comfort System I O Input Output IOP Installation Operation and Programming LED Light Emitting Diode MAX Maximum MIN Minimum NEC National Electric Code PPM Parts Per Million PROM Programmable Read Only Memory PWM PulseWidth Modula tion RSSI Receiver Signal Strength Indicator RTD ResistanceTempera ture Detector SAP Su...

Page 43: ...re Order Number VAV SVX01B EN File Number Supersedes VAV SVX01A EN Stocking Location La Crosse SinceTheTrane Company has a policy of continuous product improvement it reserves the right to change specifications and design without notice Only qualified experienced personnel should perform installation and servicing of the equipment referred to in this booklet ...

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