Temspec VUD 1200 - Maximum Operating Conditions; Troubleshooting

Temspec Unit Ventilator IOM 2023-07-05
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Maximum Operating Conditions
Condition
Value
Max Water Temperature
200F
Min Water Temperature
40F
Max External Static Pressure Tested
0.5” W.C.
Max Operating Water Pressure
150PSI
Min Distance to Structure
0”
TROUBLESHOOTING
Problem
Troubleshooting
Fan not running
Verify power to the motor
Ensure all wiring connections are correct and
secure
Ensure the controller is sending the correct
signal
Check the fan relay is energizing properly
Check the speed board is working (if applicable)
Swap motor with a working unit to ensure motor
is not failed
Damper not working
Ensure all wiring connections are correct and
secure
Ensure actuator is getting proper voltage
Ensure controller is sending the proper control
signal
Water valve not working
Ensure all wiring connections are correct and
secure
Ensure actuator is getting proper voltage
Ensure controller is sending the proper control
signal
Check overflow switch is not tripped
Electric heat not working
Ensure all wiring connections are correct and
secure
Ensure heater relay is functioning and proper
voltage is reaching the heater
Ensure the controller is sending the correct
signal
Ensure the manual high temperature switch is
not tripped
Outdoor Fan not supplying enough air
Adjust the speed control (VGB)
Check the stopper bracket position on the the
outdoor air damper, adjust if required (VGB
Series)
Balance fan
Adjust speed taps (VER)
Check the unit has a proper seal to the outside
Louver
Adjust the outdoor air damper minimum position