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Air Flow Balancing using the Door Ports Models RNC155 and RNC200 Only
The door ports ( MODELS RNC155 & RNC 200) are designed
to quickly and measure the airflows for balancing.
Normally the HRV would be balanced on high speed. If the
HRV is connected to a forced air system, both systems should be
set to run at the highest operational speed when balancing is
performed.
Balancing Procedure
Step 1 Remove balancing port covers.
Step 2 Insert one end of each connection hose into a rubber
fitting. (Use light pressure until fitting is snug).
Step 3 Attach the connection hoses to pressure gauge
Step 4 Fresh Air - Connect hoses to door ports as illustrated
(record reading).
Step 5 Stale Air - Connect hoses to door ports as illustrated
(record reading).
Step 6 Refer to the Airflow Reference Chart for the conversion
of gauge reading to airflow reading.
Step 7 Damper the airflows as required to balance the system.
The fresh airflow must equal the stale airflow.
Step 8 Repeat steps 4 to 7 as required to confirm airflows.
Magnehelic Door Port Balancing Kit
Part No. 99-206
Use the Magnehelic Gauge Kit (Part No. 99-206) for door port
balancing.
1 - Pressure Gauge 4 - Rubber Fittings
2 - Connection Hoses 1 - Instruction Page
Fresh Air
Step 4
Measuring Fresh Air Side (Connect to both ports at the same time).
MAGNEHELIC
Pressure
Gauge
MAGNEHELIC
Pressure
Gauge
Stale Air
Step 5
Measuring Stale Air Side (Connect to both ports at the same time).
Pressure Gauge
Reading
Fresh Air
Stream Flow
Stale Air
Stream Flow
(in w.g.)
(cfm) (cfm)
0.070 75 54
0.080 80 59
0.090 84 65
0.100 89 70
0.110 93 75
0.120 98 81
0.130 102 86
0.140 106 91
0.150 111 97
0.160 115 102
0.170 120 114
0.180 124 118
0.190 128 123
0.200 133 128
0.210 137 133
0.220 142 138
0.230 146 143
0.240 151 148
0.250 155 153
0.260 159 158
0.270 164 163
0.280 168 167
0.290 173 172
0.300 177 177
0.310 181 182
0.320 186 187
0.330 190 192
0.340 195 197
Airflow Reference Chart
Door port balancing is only available for Models
RNC155 and RNC200.