aldes H/E95 - MAINTENANCE; General Maintenance Safety Warning; General Maintenance Procedures

Residential HRV/ERV
37
VI. MAINTENANCE
WARNING:
In order to prevent electric shock when cleaning or servicing, unplug the HRV/ERV before
servicing.
Homeowners: It may be preferable to have a qualied service technician complete your
HRV/ERV general maintenance.
General Maintenance
WARNING: ALWAYS UNPLUG THE DEVICE BEFORE PERFORMING MAINTENANCE
Note: The light will be solid when any accessories are attached or controlling the
HRV/ERV. To avoid this, disconnect the Accessories Terminal Block.
6. Locate the 4 ports on the door of the HRV/ERV and remove the plugs.
7. Refer to the drawings on page 30 and connect the tubing from the pressure gauge
to the respective door ports for the indoor air and exhaust air connections. See
“Measuring Exhaust Airflow” on page 30.
Note: The geometry may differ from one model to another.
8. Locate the blower potentiometers and adjust the FAN OUT dial to the highest
setting. This can be audibly heard as the unit will be loudest at this operating
condition.
9. To determine the operating threshold of the exhaust regulators, slowly adjust the
FAN OUT dial until the reading on the manometer gauge starts to drop noticeably.
Note: Slight fluctuation is normal, with the needle moving up or down as the
system pressure changes.
10. When the operating threshold is determined, adjust the speed to be just above the
point where the pressure starts to drop off.
11. Record this pressure measurement.
12. Refer to the reference chart on the unit that shows the pressure readings versus the
corresponding supply airflows. Record this airflow.
Note: This airflow should be very close to the sum of the set points of the
regulators in the ZRTs. If three ZRTs are all set to 10 CFM, the total measured
airflow should be close to 30 CFM. Some discrepancy is normal.
13. Follow the procedure in “Balancing Airflow and Adjusting Motor Speed” on page 33.
Note: The “Balancing Airflow and Adjusting Motor Speed” Section will have you
balance the higher airflow to the lower airflow in order to achieve balance
between supply and exhaust air streams. With the VentZone® System, the
exhaust should be the lower CFM air stream, so you will be balancing the supply to
the exhaust per these steps.