Balancing Reset
Checkout
Pressure-airflow correlation table:
Pressure Differential
Fresh Air
Exhaust Air
Pa
in. W.C.
L/s
CFM
L/s
CFM
50
0.20
44
93
43
90
62
0.25
41
87
40
85
75
0.30
39
83
37
79
87
0.35
37
79
36
77
100
0.40
35
74
36
76
112
0.45
33
69
34
71
125
0.50
30
65
32
67
137
0.55
29
61
28
60
150
0.60
26
56
24
51
162
0.65
24
50
22
47
175
0.70
22
46
19
41
187
0.75
19
41
17
36
199
0.80
17
36
15
31
The VNT5070 ventilators are balanced by utilizing pressure ports located on the duct collars and a pressure-
airflow correlation table provided as a decal on the side of the unit.
NOTE: The VNT5150, VNT5200, VNT6150 & VNT6200 ventilators are not provided with pressure ports or
correlation charts. Instead, they are balanced by using air flow grids or pitot tubes which measure
airflow directly in each airstream.
ERV/HRV Ventilation Systems 69-2480EF—19
31
• Apply power to the unit. Move the selector switch to the CONT position to verify that the unit turns on in
continuous speed.
• Initiate a ventilation call from each of the external controls. Verify that the ERV/HRV unit turns on in high speed.
• Return the selector switch to the desired position and the external controls to the desired settings.
• Inspect the ducting to ensure that there are no kinks and correct as necessary.
Airflow Measurements - VNT5070 only
LED
3-POSITION
SELECTOR SWITCH
SPEED CONTROL
BUTTONS (+ AND -)
Speed
Control
Open for
Instructions
M32371
NOTE: Once balancing is completed, balancing cannot be changed without resetting the unit.
To reset:
1. Press the (+) and (–) buttons simultaneously for 10 seconds.
2. Indicator light will turn yellow at 5 seconds.
3. Indicator light will turn green at 10 seconds.
4. Release both buttons.
5. Unit has been reset and can be put into balancing mode again.
