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HE-Series Outdoor
ERV
MAINTENANCE
6.5 NORMAL OPERATION
A wide variety of control schemes may be selected by the engineer, installer, or owner to
meet the ventilation needs of the facility. These may include timer clocks, occupancy sensors,
dehumidistats (for cool-weather operation), carbon dioxide sensors, and others. DDC systems
may also control the unit. Most control schemes will operate the unit only when needed.
Continuous operation is acceptable in virtually all conditions. Unit will not be damaged
by continuous operation as long as airflow occurs. Blower motors may overheat if filters
become completely blocked due to lack of maintenance. Motors are thermally protected. With
continuous operation, some external frosting may occur in very cold weather (see Section 6.6).
6.6 OPERATION IN EXTREME COLD WEATHER
HE1.5XRT units are capable of operating without internal frosting at temperatures down to
-10°F, with indoor humidity below 40%. The units can operate under more severe conditions
occasionally with little or no impact on their performance. At lower humidities, they can operate
at still lower outside temperatures without freezing the enthalpic cores.
Some condensation or even frost may form on the outside of the unit or drip off the cabinet
during very cold conditions, especially if the unit runs continuously. Exterior condensation
during extreme cold conditions can be reduced or prevented by periodically cycling the unit OFF
for several minutes to allow the cabinet to warm up.
7.0 MAINTENANCE
RenewAire ERVs are built to operate with minimal maintenance. After unit commissioning, the
primary areas of attention are the air filters and annual vacuuming of the enthalpic cores.
7.1 MAINTENANCE 24 HRS. AFTER START-UP
24 hours after unit start-up:
u
In new installations, check the air filters since they will often collect dust, dirt and debris at
time of start-up.
7.2 MAINTENANCE 30 DAYS AFTER START-UP
After 30 days of operation:
u
Tighten all electrical connections.
u
Check the air filters as part of the normal monthly maintenance.
7.3 MAINTENANCE SCHEDULE
Experience on the part of the service person is the most important issue in establishing a
maintenance schedule. There will be times of the year when frequent inspection of the filters
will be required, such as spring and summer when there may be pollen, dust, dirt or debris from
budding trees and bushes that can clog the filters. Also see Section 7.7 Maintenance Records in
this manual.
Danger of injury if unit
starts unexpectedly.
Switch power off at service
disconnect. Lock-out/tag-
out the disconnect.
WARNING
Danger of Electrical
Shock when servicing an
installed unit.
ALWAYS DISCONNECT
POWER SOURCE BEFORE
SERVICING! More than one
disconnect switch may be
required.
Proper Wiring Size Selec-
tion and Wiring Installation
are the Responsibility of
the Electrical Contractor.
WARNING
RISK OF INJURY OR DAMAGE.
Motor may have a manual reset thermal protector. Disconnect power before servicing or
resetting motor thermal protector. Use caution, motor may be hot. Allow the motor to cool
before resetting the thermal protector.
If the motor thermal protector tripped, correct the issue that caused the motor to overheat
(e.g. over motor rated amperage or locked rotor).
If the motor has a manual reset thermal protector, the red thermal protector reset button is
located on the motor body, on or near the lead end of the motor. If the button does not reset,
the motor may still be too hot. Allow the motor to fully cool to reset the thermal protector, you
should feel or hear a click when the thermal protector resets while pushing the reset button.
WARNING
