Temspec Unit Ventilator IOM 2023-07-05
[23]
VER ERW Balancing Procedure
1.
Prior to starting balancing, disconnect the power to the energy recovery wheel by disconnecting the wire
harness plug that supplies power to the wheel.
2.
If the unit has an Economizer damper, ensure the Economizer damper along with the economizer exhaust
damper is in the closed position prior to commencing balancing.
3.
Ensure the unit is in "Occupied" mode. This will open the ERV Ventilation air and Exhaust air damper so that
proper balancing can be completed.
4.
Balance the supply air to scheduled values via the supply air speed taps.
5.
Balance the ventilation air and return air by using the temperature balancing method described below.
Balance the fresh air on the Energy Recovery Wheel by using the return air damper. Adjust the RAD
damper and linkage (figure 1) until the proper fresh air volume is achieved.
6.
If additional restriction is required to achieve proper balancing, the Exhaust Air fan speed may be
adjusted using the speed taps. Based on field conditions, the ERV exhaust air opening may require to be
partially blocked off with sheet metal.
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