VENTILATORS VH30100 - Balancing the Unit

HIGH (Exhaust Air to Outside)
LOW (Exhaust Air from Home)
LOW (Fresh Air from Outside)
HIGH (Fresh Air to home)
HIGH (Exhaust Air to Outside)
LOW (Exhaust Air from Home)
Magnehelic gauge
Magnehelic gauge
Balancing Tap Connection
*
LOW (Fresh Air from Outside)
HIGH (Fresh Air to home)
SEQUENCE OF OPERATIONS
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IO-VENT-SS
(+) and (–) buttons: These buons are used for adjusng
both the high and CONT fan speed sengs when the
control is in RUN mode.
BALANCING Mode
When the control is set to Balancing mode, the LED
indicator turns yellow and the selector switch is used for
seng the high speed of the fans for balancing purposes
(Supply (fresh) air, Exhaust air, and Both). The opons are:
• INTER (Intermittent): With the selector switch in this
posion, the speed of the exhaust air fan can be set
• CONT (Continuous): With the selector switch in this
posion, the speed of BOTH the exhaust and supply air
fans can be set
• OFF: With the selector switch in this posion, the speed
of the supply air fan can be set.
(+) and (–) buttons: These buons are used for adjusng
the fan speed of either or both of the supply and exhaust
fan motors, depending on the fan motor selected by the
posion of the selector switch. The + buon increases the
speed of the fan being adjusted
and the (– ) buon decreases the speed.
NOTES:
1. Connuous low speed is 50% of the fan speed
selected for HIGH speed.
2. When the LED stops ashing, the venlator is at
its maximum speed.
Procedure for Setting High (Override)
Airow Rate and Balancing the Ventilator
To balance the venlator, you will need to independently
adjust the ow rate in both the fresh air (supply) duct as
well as the stale air (exhaust) duct. You will need an airow
measuring device such as a pitot tube or a Magnehelic gauge.
NOTE: Turn the HVAC equipment fan ON while
performing these balancing steps
1. Once the total CFM needed is determined (see
Venlaon Requirements secon), you can start
balancing the HRV/ERV.
2. Set the three-posion selector switch on the venlator
control to either the INTER or CONT posion.
3. Press and hold both the (+) and (–) buons
simultaneously for 5 seconds unl the LED light turns
yellow, indicang the unit is now in Balancing mode.
4. When in Balancing mode, the selector switch becomes
the motor selector switch. The switch posion selects
which fan motors will be adjusted during balancing.
5. Adjust the airow rate in the fresh air duct by seng
the selector switch to the OFF posion.
6. Connect the airow measuring device to the integral
balancing taps on the venlator's collars.
Magnehelic Gauge with Airow Grid
7. Press the (+) and (–) buons on the venlator control
to increase or decrease the fan motor speed to pro-
duce the desired airow in the duct being measured.
Note: When the LED stops ashing, the venlator is
at its maximum speed.
Figure 12 Locaon
of balancing taps on
collars