Carrier VVT 33ZCVVTZC-01 Installation, Start-up And Configuration Instructions

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Carrier VVT 33ZCVVTZC-01 Installation, Start-up And Configuration Instructions Manual pdf 27 page image

279. Check to be sure the area around the air source is clear ofconstruction dirt and debris.10. Check that final filters are installed in the air handler(s).Dust and debris can adversely affect system operation.11. Verify that the zone controller and the air source controlsare properly connected to the communication bus.12. Remember to utilize good duct design and to providesufficient straight duct at the inlet of the box. A minimumof three times the inlet size is recommended.Network Addressing — Use the following methodwhen all the zone controllers are installed and powered, and theSPT sensors are wired and functioning properly. This methodcan be used if no addresses have been set previously. Theaddress of an individual zone controller may be set by usingthe System Pilot. This is the standard method of setting theaddress.Each zone controller will default to an address of 0, 140when its application software is initially loaded. Since multiplecontrollers will be on the same bus, a unique address must beassigned to each controller before the system can operateproperly. The assignment of controller addresses will beperformed through the System Pilot, as follows:1. The System Pilot recognizes that the Zone Controller’saddress, stored in the zone controller memory, has notbeen written yet (this will be true when the unit is firstpowered up on the job, or after a jumper-initiated reset).2. Press the override button on the SPT (terminals J4-14 andJ4-12 are shorted) for 1 to 10 seconds.3. The zone controller address changes from 0, 140 to 239,239 for a period of 15 minutes.4. Use System Pilot to change the address from 239, 239 toa valid system address within 15 minutes.NOTE: If the address is not changed from 239, 239 to a validsystem address within 15 minutes, the controller will revert toaddress 0, 140 and use of the override button will cause theaddress function to repeat. The operator MUST actively set theaddress even if the final desired address is 0, 140.Initial Operation and Test — Perform the followingprocedure:1. Apply 24 vac power to the control.2. Using the System Pilot, upload the controller fromaddress assigned in Network Addressing section above.3. From the Terminal Service Configuration screen, proper-ly configure the damper type and inlet size. If a roundinlet is used, then enter the size directly in the InletDiameter decision. If a square, rectangular, or ellipticaldamper inlet is supplied, then enter the inlet size in squareinches in the Inlet Area decision.4. If the terminal damper closes in the CW direction, then noadjustment is required. Otherwise, locate the damperdirection configuration decision (CW Rotation) andtoggle the value to OPEN by using the space bar. Thisconfiguration decision is also located on the TerminalService Configuration screen.5. After entering the area and rotation direction, verify oper-ation of the damper. From the System Pilot Diagnostic,Maintenance Screen, select the Zone CommissioningTable and force the Commissioning Mode point toEnable. Then select the Damper Cal point and force thispoint to Enable. The controller automatically tests theactuator by fully closing the damper.It checks the fully closed position to determine if thecontrol was properly mounted. It then opens the damper.The control scales the actual actuator travel range used toa 0 to 100% open value. Finally the control will close thedamper, test, and zero the pressure transducer. Whencompleted, the control automatically removes the forcefrom the Damper Cal point. If a failure occurs at anypoint during the testing, the Damper Calibration Statuspoint at the bottom of the screen will indicate ALARMand the test will be aborted.6. The actuator stroke has now been calibrated for the prop-er rotation.Fan and Heat Configuration and Test — Per-form the following procedure to configure and test the fan andheat:1. Display the Terminal Service Configuration screen tomake sure the proper Terminal Type and Heat Type areconfigured. See the Configuration section to answerquestions about the individual configurations.2. From the Diagnostics Maintenance Screen select theZone Commissioning table.3. Force the Commissioning Mode to Enable.4. If the terminal is a parallel or series powered fan box,force the Fan Override to Enable. If the damper is open itmay have to be repositioned to the proper positiondepending on the box type. Damper percent change willbe displayed. After the damper is positioned correctly, thefan relay should energize and the fan should run for a fewseconds.5. Make sure the fan runs and the Fan Override decisionreturns to disabled to ensure the fan is wired correctly forproper operation.6. Force the Heating Override to Enable. If the unit is asingle duct unit, this must be done with the primary termi-nal at reheat set point. The damper will open to the reheatcfm. The heat outputs will be commanded to providemaximum heat. If the unit is a fan-powered terminal, thefan must be on.NOTE: The damper position settings can be found underservice configuration in the table AIRFLOW.System Balancing — To balance the system, performthe following procedure:1. Enable the balancing process by forcing System Com-missioning to Enable.2. Enable the All Zone Dampers to Max point.3. The zone controller will send all system zone dampers totheir configured maximum positions and display thevalues. Check the system maximum airflows to all zonesand set zone dampers while the system is at maximumflow and the bypass damper is closed. Adjust maximumdamper position set points if required. The system canalso be balanced at design conditions with some dampersclosed.4. If the user forces any zones to a new position, the new po-sition is written to the zone’s maximum damper positionconfiguration value and the damper is repositioned.5. Enable the All Zone Dampers to Min point.Before starting the air source fan, make sure that dampersat the system’s air terminals are not fully closed. Startingthe fan with dampers closed will result in damage to thesystem ductwork.