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EngA C-TRAC2 Installation, Operation And Maintenance Manual

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INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
CANADIAN
HEAD OFFICE
AND FACTORY
1401 HASTINGS CRES.
SE
CALGARY, ALBERTA
T2G 4C8
Ph: (403) 287-4774
Fx: 888-364-2727
SALES OFFICES ACROSS CANADA AND USA
Retain instructions with unit and maintain in a legible condition.
Please give model number and serial number when contacting
www.engineeredair.com
IOM-12
A
C-TRAC2
COOLING CONTROLLER
UNIT MODEL NO. _________________
UNIT SERIAL NO. _________________
SERVICED BY: ___________________
TEL. NO: ________________________
HEAD OFFICE
AND FACTORY
32050 W. 83
DESOTO, KANSAS
Ph: (913) 583-3181
Fx: (913) 583-1406
Engineered Air for information and/or parts.
FOR
USA
rd
STREET
66018
Page 1
CANADIAN
EASTERN FACTORY
1175 TWINNEY DRIVE
NEWMARKET,
ONTARIO
L3Y 5V7
Ph: (905) 898-1114
Fx: (905) 898-7244
March 1999 R1

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Summary of Contents for EngA C-TRAC2

  • Page 1 INSTALLATION, OPERATION AND MAINTENANCE MANUAL C-TRAC2 COOLING CONTROLLER UNIT MODEL NO. _________________ UNIT SERIAL NO. _________________ SERVICED BY: ___________________ TEL. NO: ________________________ CANADIAN CANADIAN HEAD OFFICE HEAD OFFICE EASTERN FACTORY AND FACTORY AND FACTORY 1401 HASTINGS CRES. 32050 W. 83...

  • Page 2: Table Of Contents

    CONTROL START-UP AND OPERATING STRATEGIES ........5 Heat Output ............................5 Heat Ramp Used on the Original C-TRAC ................... 5 Heat Ramp Used on the Revised C-TRAC2.1 ................6 Hot Water and Steam Heating ...................... 6 Simulate a Call for Maximum Heat ....................6 Economizer Control ..........................
  • Page 3 C-TRAC2.1 MANUAL XIII. TEMPERATURE CONTROL – GENERAL OVERVIEW .......... 9 Discharge Temperature Calculation ....................9 XIV. SENSORS AND SET-POINTS ................. 9 The Master Set-Points ......................... 9 The Optional Reset Inputs ........................ 10 Night Heat ............................10 INDUCED VOLTAGE ON REMOTE CONTROL WIRING ........10 XVI.
  • Page 4 For Direct C-TRAC Control of the G-TRAC-2 ................... iv Sensor Location ........................... iv Mixed Air Dampers ........................iv Possible C-TRAC2.1 Adjustments to Reduce Hunting ............. iv Economizer Trouble Shooting ......................v 0 to 10 VDC Motors ........................v Motors wired to R, B, and W terminals ..................v Economizer Not Opening ......................
  • Page 5 C-TRAC2.1 MANUAL Ambient Light stays On, Terminal “A” Has No Power ............. vii QUICK CHECK FOR C-TRAC-2.1 NORMAL OPERATING SEQUENCE ....... VIII AIR CONDITIONING (Air Cooled Condenser) ..............IX IOM-12 March 1999 R1...

  • Page 6: Application

    The mechanical cooling switching has minimum run time, minimum off time, and inter-stage timing. Each time the C-TRAC2.1 is first powered on the H and N terminals it begins its cycle in the heat mode. How quickly the C-TRAC2.1 will react, depends on how far the temperature at the discharge sensor is from the calculated set point.

  • Page 7: Wiring

    VII. DIP SWITCHES AND POTS The C-TRAC2.1 uses a number of dipswitches and pots to set the parameters it will look at to set its control set point at. They are set at the factory to "customize" the control for its particular application on each unit.
  • Page 8 To repeat, the pre-selected options are set at the factory by setting the dipswitches and pots. If the settings are not correct the C-TRAC2.1 will not be able to function as designed due to the logic chip receiving incorrect information.

  • Page 9: Pots And Dip Switch Chart

    Switches 3 through 5 = off To calibrate the set point dial on the Colder Switches 6 and 7 are for front of the C-TRAC2.1. To use this, economizer set up. “S” and “SP” must be jumped. If an Hotter...

  • Page 10: Status Lights

    The C-TRAC2.1 has 4 status lights. Heating Control Mode This light is on whenever the C-TRAC is in the heat mode (the C-TRAC2.1 always starts in heat mode). Cooling Control Mode This light is on whenever the C-TRAC is in mechanical cooling mode.

  • Page 11: Heat Ramp Used On The Revised C-Trac2.1

    Heat Ramp Used on the Revised C-TRAC2.1 This revision was made to Model C-TRAC2.1 in the spring of 1996. It has a 0 to 10-volt heat output ramp to modulate different heating controls (G-TRAC, G-TRAC2, DJM2.1, H-TRAC, etc.) The 0 to 10 VDC modulating output signal comes from the C-TRAC2.1 new terminal “HD”...

  • Page 12: Bms Minimum Position Reset

    C-TRAC2.1 MANUAL BMS Minimum Position Reset Some applications require that BMS systems take control of the minimum OA position for smoke control or to maintain building static by supplying a 0 – 10 VDC signal to the C-TRAC 2.1. This method would require a diode to be placed on ‘ED’...

  • Page 13: Cooling

    C-TRAC2.1 terminal A. When the outside temperature is above the set-point of the ambient control then a 24 VAC signal is applied to terminal A. The C-TRAC2.1 is able to cycle on the cooling stages.

  • Page 14: Temperature Control - General Overview

    The C-TRAC2.1 is designed primarily as a discharge air control. However, the discharge temperature can be reset up or down if a reset control is connected to the system. The C-TRAC2.1 has the ability to modify the discharge temperature by any of the following: ...

  • Page 15: The Optional Reset Inputs

    If an ambient room override set point is used it is wired to the “Z, X, Y”, and “V” terminals. This is used on any override except the BMS control or a VAV system. The BMS reset does not have a set point on the C-TRAC2.1. It is controlled from the BMS system. Refer to Section XVII.

  • Page 16: Room Reset Thermostat Options

    X” and “Y”. Refer to the unit-wiring diagram to determine the usage of any TE 6100-960. A discharge set-point knob on the front of the C-TRAC2.1 is usually used as the set point. If it is in use the C-TRAC2.1 terminals “S” and “SP” will have a jumper across them.

  • Page 17: Option 3 - Room Sensor Only

    C-TRAC2.1 MANUAL Discharge sensor/set-point Blue Discharge set-point + Discharge set point Grey Orange Dis. S.P. centre tap NOTE Do not use the sensor (violet wire) on the TE 6100-960 if it is being used only as a remote discharge set point...

  • Page 18: Ma Or 0-10 Vdc Bms Reset Signal

    BMS signal falls below 12 MA, 5.5 VDC the discharge temperature is driven colder.) NOTE: At approximately 5.5 VDC or 12 ma input from the BMS there would be no reset occurring. As the BMS input voltage deviates from this voltage, the C-TRAC2.1 will reset the discharge up or down. NOTE: If the control is set up for a BMS signal and that signal is not connected, the C- TRAC will interpret the lack of voltage as a full call for reset downwards.

  • Page 19: Calibration Method 1

    960 and the TE 6100-960 combination set point and sensor is pre-calibrated at Johnson's factory. The Engineered Air C-TRAC2.1 has been calibrated at the Engineered Air factory. 1. To determine what control options this C-TRAC is configured to operate with check the wiring diagram, control function, or C-TRAC dipswitch settings.

  • Page 20: Te 6100-960 Johnson Controls Set-Point/Sensor Approximate Resistance

     Ensure the C-TRAC2.1 is in the heat mode. If it is the heat light will be on. If the light is not on disconnect power to the C-TRAC2.1 and reenergize it. This will place it in the heat mode for a while.

  • Page 21: Discharge Calibration Method 2

    On some units there are two TE 6000-960 sensors that get switched by a relay depending on what function the C-TRAC2.1 is in. The D/A sensor before the cooling coil is for heating, the one after for cooling.

  • Page 22: Suggested Settings Re Hunting Problems

    39ºF at which point no reset is to occur.) This checkout procedure is for a C- TRAC2.1 wiring diagram with resistor value of 324 wired between C-TRAC2.1 terminal V and the ambient sensor. If this resistor is not a 324 (the most common version), but is either a 402 or 365 ohm, this calibration will be slightly off.

  • Page 23: Lock-Up - Radio Frequency Interference

    Installation of a radio frequency filter will resolve the problem. Disconnect the wires from “H” and “N” on the C-TRAC2. Connect them to the RFI filter. Connect the outlet of the filter to the “H” and “N” terminals with wires no longer then six inches in length if possible. Ensure the RFI filter is well grounded.

  • Page 24: C-Trac2.1 Set Up Sheet

    C-TRAC2.1 MANUAL XXI. C-TRAC2.1 SET UP SHEET C-TRAC2.1 JOB # TAG # DATE DISCHARGE DISCHARGE C/W DISCHARGE C/W DISCHARGE C/W DISCHARGE C/W ROOM ONLY ROOM RESET 4-20 / 0-10 RESET AMBIENT RESET VAV POS RESET ONLY Dip Switch 1 Dip Switch 2...

  • Page 25: Trouble Shooting

    NOTE  If there is to be an interruption of only the C-TRAC2.1 power such as by a time clock shutdown at night, there cannot be any other load connected to the C-TRAC terminals “H, A, E”, or “K”. If this wiring is not correct there may be about 18 volts on any components attached incorrectly (when the C-TRAC2.1 has power turned off.)

  • Page 26: Is The C-Trac2.1 Properly Configured

    Voltage Noise Firstly it is possible for an AC signal to have an effect on any of the wiring to the C-TRAC2.1 sensors and set points. The use of shielded cable with a grounded shield at one end only for these purposes may be a necessity if there is an induced voltage on the C-TRAC2.1 wiring.

  • Page 27: No Heat

    G-TRAC, DJM2.1 If the C-TRAC2.1 is controlling a DG or a DJ unit that is operating below the low fire range there will be some hunting as the burner cycles on and off. Reduction of the hunting may not be possible without optimum burner set up.

  • Page 28: Djm2 Slaving From C-Trac

    (Adjust it towards 13.) Adjust the travel of “linkage” style actuators to maximum stroke (160ºF). Possible C-TRAC2.1 Adjustments to Reduce Hunting Lastly, select the next lower setting for the heat envelope pot (11). Do not set pot 11 below 1.5. Pot 11 works in conjunction with pot 3.

  • Page 29: Economizer Trouble Shooting

    There is a maximum of three damper motors allowed to be connected to the damper output terminals “R, B”, and “W”. A shunt resistor must be placed across terminals “R” and “B” of the C-TRAC2.1 when more than one damper motor is used (2 motors 1500 ohms resistance, 3 motors 909 ohms).

  • Page 30: Minimum Position Is Open Too Much

    C-TRAC2.1 MANUAL If the operator is wired to C-TRAC2.1 terminals “ED” and “B” the control voltage will ramp closed (0 VDC) to open (10 VDC). NOTE  If an economizer is in use and a control motor is being operated from the “HT” and “B”...
  • Page 31 C-TRAC2.1 MANUAL Ambient Light stays On, Terminal “A” Has No Power The ambient light comes on when terminal “A” is powered with 24 VAC. If there is also an induced voltage on the wire to terminal “A” after the ambient light is turned on, and the light does not go off when the 24 VAC is removed, it may be necessary to use a relay on this terminal to isolate the induced voltage.
  • Page 32 QUICK CHECK FOR C-TRAC-2.1 NORMAL OPERATING SEQUENCE The following is a flowchart covering many general operating/troubleshooting stiuations. If a more detailed manual is needed, contact the nearest EngA factory.  Power OFF then on to 24 VAC to H and N ...
  • Page 33 AIR CONDITIONING (Air Cooled Condenser) The following is a flowchart covering many general operating/troubleshooting situations. If a more detailed manual is needed, contact the nearest EngA factory. Is supply fan (and optional return fan) Refer to wiring diagram for fan...
  • Page 34 C-TRAC2.1 MANUAL Determine type of compressor – Hermetic (welded) or Semi-Hermetic (bolted) 1. Hermetic Compressors  Most hermetically sealed compressors have internal pressure relief valves. If so equipped, there is usually no external high-pressure switch (usually open above 360#). Some hermetic compressors have compressor protection modules.
  • Page 35 C-TRAC2.1 MANUAL ENGA C-TRAC 2.1 OPTIONAL COMPUTER INPUT TO MODIFY 24 V DISCHARGE SIGNAL UNGROUNDED POWER INPUT 0 – 10 VDC ECONOMIZER DAMPER MOTOR SWITCHES 1 2 3 4 5 6 7 CONTACTOR POWER Grey OUTPUT FOR FIVE STAGES Orange...

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