Page 31
Healthy Climate
®
HRV/ERV Ventilators
Airflow balancing using the door ports
Available on Selected Models
Door balancing ports (available only for HRV4−150,
HRV4−200, HRV3−150−TPD, and HRV3−150−TPF)
are de-
signed to be used in conjunction with a Magnehelic Gauge
or Digital Manometer to measure the stale and fresh air-
flows for balancing.
NOTE − Door port balancing on the HRV3−150−TPD and
HRV3−150−TPF requires a Magnehelic Gauge with a scale
of 0 to 1.00" w.c. HRV4−150 and HRV4−200 require a Mag-
nehelic Gauge with a scale of 0 to 0.50" w.c.
Balancing Procedure
1. Prepare the airflow measuring device (Magnehelic
Gauge or DIgital Manometer) by connecting the hoses
to the low and high pressure side of the gauge.
2. Insert the hoses into the rubber fittings from the option-
al Door Port Adapter Kit (Y2206 or Y2207). Use light
pressure and rotate until fitting is snug. Do not extend
the hose past the rubber fitting.
3. Open the HRV Door. Remove the 4 Door Port Covers
by carefully pushing them out from the back side of the
door (use the blunt end of a large drill bit etc.).
4. Close the HRV Door. Initiate power and operate the
HRV on high speed. Operate the forced air system on
high speed (if the HRV is connected to the forced air
system) .
5.
Measure Stale air
Insert the 2 rubber fittings from
the gauge to the STALE AIR Balancing Ports (see fig-
ure 32). Seal the FRESH AIR Balancing Ports (upper
left and lower right) with tape. Record your reading.
6.
Measure Fresh air
Insert the 2 rubber fittings from
the gauge to the FRESH AIR Balancing Ports (see fig-
ure 31). Seal the STALE AIR Balancing Ports (upper
right and lower left) with tape. Record your reading.
7. Refer to the Airflow Balancing Reference (see tables
1, 2, 3) for your model and determine the FRESH AIR
and STALE AIR flow rates.
8. Damper down the higher airflow and repeat Steps 5 to
7 as required until both airflows are identical (bal-
anced).
9. Remove the tape and rubber fittings and reinstall the
4 Door Port Covers.
Gauge connected
to Fresh Air
Balancing Ports
HRV4−150 and
HRV4−200
HRV3−150−TPD
HRV3−150−TPF
PRESSURE
GAUGE
PRESSURE
GAUGE
Gauge connected
to Fresh Air
Balancing Ports
Figure 31. Door Balancing PortsFresh Air
Gauge connected
to Stale Air
Balancing Ports
HRV4−150 and
HRV4−200
HRV3−150−TPD
HRV3−150−TPF
PRESSURE
GAUGE
Gauge connected
to Stale Air
Balancing Ports
PRESSURE
GAUGE
Figure 32. Door Balancing PortsStale Air
