Installation/OwnerProgramming
VariTrane
™
Analog
Electronic Controls
VAV-SVX03A-EN
November 2001
For use with:Single-Duct Cooling & Reheat UnitsParallel & Series Fan-Powered UnitsLow-Height Parallel & Series Fan-Powered Units
Page 1: ...on Owner Programming VariT rane Analog ElectronicControls VAV SVX03A EN November 2001 For use with Single Duct Cooling Reheat Units Parallel Series Fan Powered Units Low Height Parallel Series Fan Pow...
Page 2: ...VAV SVX03A EN 2001 American Standard Inc All rights reserved...
Page 3: ...l Minimum 10 Calibration Transducer Operation 11 NullVoltage 11 Procedure for Maximum and Minimum Calibration 11 Set Maximum Flow 11 Set Minimum Flow 12 No Dual Minimum 12 Auto Dual Minimum 12 Balanci...
Page 4: ...n transit damage must be filed immediately with the delivery carrier For re heat units check the coil fins and make sure the coils are not damaged Locate and verify that the correct zone sensors are w...
Page 5: ...ntain the desired temperature the re heat will be activated to increase the temperature of the discharge air On a parallel unit theVariTrane air damper delivers primary cooling air to the unit outlet...
Page 6: ...6 VAV SVX03A EN Figure 2 Typical Fan Powered Units Unit Information VSCF VSWF VSEF VPCF VPWF VPEF...
Page 7: ...all unit sizes 3 A minimum setting of zero is permissible except forVCEF units Analog Controls Electronic Controls Installation Check the wiring on the unit with the wiring diagram and wiring informat...
Page 8: ...changeable with DDC zone sensors The three wires required for the wall zone sensor to the terminal block are to be furnished and completed by the installer If local codes require enclosed conductors t...
Page 9: ...ature is 0 5 F below the setpoint the damper begins to modulate to its minimum position supplying less cold air and more warm plenum air When the air damper is at minimum and zone temperature is still...
Page 10: ...to the flow voltage Control Options Auto Dual Minimum The auto dual minimum enables the unit to change the minimum automati cally without an outside signal The minimum changes when the first stage re...
Page 11: ...Rotate min B R69 full counter clockwise 3 With both of the transducer ports open to ambient 0 delta P read the output voltage atTP4 Ground is eitherTP3 TB1 2 orTB1 3 The value of the null transducer...
Page 12: ...closed when minimum is desired Auto Dual Minimum Place jumper on J18 A to B The heating minimum is the minimum at which the damper is controlled to when the fan on a fan powered unit is activated or w...
Page 13: ...ck the 12 volts DC power supply of the circuit card terminalsTB1 5 to TB1 3 Acceptable range 11 6 to 12 4 volts DC 3 Install the magnehelic gage to observe delta P When connecting to the test tees be...
Page 14: ...at jack J3 5 Reheat stages or fan on fan powered units are connected at jacks J7 24 VAC J9 J10 and J11 6 Various options to cause changes to the operation of unit are input at jack J15 7 There are va...
Page 15: ...rmistor will equal the voltage drop between terminal 2 and Zone Sensor terminal 3 With the voltages being equal the room temperature is considered satisfied and all output relays are de energized If t...
Page 16: ...k leaving air temperature from air handling unit Coils do not engage on Faulty relay orTriac Check for voltage to heating coil and relay s Verify supply voltage matches coil voltage Call for heat Boar...
Page 17: ...n the room setpoint is above the actual room temperature stages of heat will be energized if enabled 3 If the zone sensor does not operate at all check the wiring from the board to the sensor Referenc...
Page 18: ...trol Refer to prior sections for step by step procedures 2 Remove all connections from J9 J10 and J11 In addition remove J19 if it is a series fan power unit 3 Set the zone sensor to the full cooling...
Page 19: ...om temperature must be between 65 F and 80 F Make sure also that placement of the zone sensor is satisfactory It should not be located in direct sunlight on cold or hot wall surfaces etc A zone sensor...
Page 20: ...VAV SVX03A EN File Number SL TD VAV 000 SBX03A EN 1101 Supersedes New Stocking Location La Crosse SinceTheTrane Company has a policy of continuous product and product data improvement it reserves the...
