1034349-UCL-A-0313
4 Unitary Products Group
Operating Measurements - Air Flow
ELECTRICAL DATA
T1 - T2 ____________________________ Volts
Control Voltage ______________________ Volts
T2 - T3 ____________________________ Volts
T1 - T3 ____________________________ Volts
Fan operates with proper rotation
ID Fans Exh. Fans Cond. Fans
Pressure drop across dry evaporator coil (At maximum design CFM)
1
1. Consult the proper airflow to pressure drop table to obtain the actual airflow at the measured pressure differential.
IWC
External Static Pressure IWC
Return Static Pressure IWC
Supply Static Pressure IWC
Supply Air CFM Using Dry Coil Chart CFM
Final Adjusted Supply Air CFM
2
2. Was a motor pulley adjustment or change required to obtain the correct airflow?
Was it necessary to increase of decrease the airflow to meet the design conditions?
If the motor pulley size was changed, measure the outside diameters of the motor and blower pulleys and record those diameters here;
Blower Motor HP _______________________________FLA________ RPM________
Pulley Pitch Diameter ______________Turns Out________ Final Turns Out________
Blower Pulley Pitch Diameter ________________ Fixed Sheave_________________
CFM
Device Nameplate
Measured
List All Three Amperages
Supply Fan Motor
1, 2
1. VAV units with heat section - simulate heat call to drive VAV boxes and VFD/IGV to maximum design airflow position.
2. VAV units without heat section - VAV boxes must be set to maximum design airflow position.
AMPS AMPS
Exhaust Motor (Dampers 100%) AMPS AMPS
Condenser Fan #1 AMPS AMPS
Condenser Fan #2 (if equipped) AMPS AMPS
Condenser Fan #3 (if equipped) AMPS AMPS
Condenser Fan #4 (if equipped) AMPS AMPS
Compressor #1 AMPS AMPS
Compressor #2 (if equipped) AMPS AMPS
Compressor #3 (if equipped) AMPS AMPS
Compressor #4 (if equipped) AMPS AMPS
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