Important Reminder - Ortech OD-ERV 150AC Instruction Manual

Energy Recovery Ventilators
MODEL OD-ERV 150AC
OPERATION
Balancing Instructions
Regarding Section d — Keep the MOS off so the unit will run at low speed. Open the pressure port caps for the OA air stream
and insert the tubing into the ports about 1". Take a DP reading and record it in section d no.1 below on this page.
1. Adjust the OA fan speed control to obtain the desired CFM per the table in section d no.2 below.
Enter the CFM information in the box in section d no.2
2. Remove the tubing, close the pressure port caps, and then repeat the process for the RA air stream

Important Reminder

After 30 days of unit operation, check / tighten all mounting and support hardware. Inspect filters for cleanliness. If filters
appear dirty, replace or clean them.
Whenever there is a reconfiguration of the HVAC system in a residence, the speed controls should be re-calibrated for
optimum performance. If the residence undergoes significant structural changes, such as an addition to the home, the unit
should also be re-calibrated. If optional MERV 13 filters are installed, recalibration is also required
The unit provide the ability to deliver completely balanced airflows, or to modify them as desired. In a perfect environment,
airflows would be balanced so that there is no difference between OA (Outside Air) airflow and RA (Return Air) air flow.
Many owners will prefer to have a slight imbalance, providing a slight excess of OA to reduce air infiltration into a house.
Some homes may require imbalance because a furnace or water heater is not direct-vented. If needed, an HVAC professional
will be able to advise balance settings that will best address the circumstances in each house.
d. 1) Manometer Readings at Commissioning
Return Air Pressure Port
Exhaust Air Pressure Port
Outside Air Pressure Port
Supply Air Pressure Port
d. 2) Pressure Drop to Airflow Conversion Table
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13376 Comber Way
Surrey BC V3W 5V9
Pressure Drop
Pressure Drop
375 Admiral Blvd
Mississauga ,
ON L5T 2N1
Instruction Manual
Outside Air Flow:
CFM
CFM
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