ERV
HE1.5XRT
19
1.800.627.4499
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
WWW.RENEWAIRE.COM
INSTALLATION
PRINCIPAL OF OPERATION
The HE1.5XRT has one basic purpose: to exhaust
air from a structure and bring in fresh air from
outside, while transferring heating or cooling
energy from the exhaust air to the fresh air.
The HE1.5XRT is a very simple device, and will
accomplish this purpose as long as the blowers
for both airstreams are able to move air through
the energy-exchange core.
CHECKING THAT UNIT IS OPERATING
Air Flow
Airflow should be occurring in both airstreams.
Sometimes the easiest place to confirm that air
is moving is at the weatherhoods.
If exact airflow is critical, it may be desirable to
permanently install flow measuring stations and
manometers in the ductwork connected to the
unit. These also can be used to determine when
filters should be cleaned or changed.
Use Static Taps in Doors to
Measure Airflow Rates
See “Cross-Core Static Drop” in MEASURING
AIRFLOW table. These may be used to directly
measure airflow in the unit.
Energy Exchange
Precise determination of installed sensible energy
exchange effectiveness requires careful measure-
ment of temperatures and air flows in all four air
streams, and in practice is somewhat difficult.
It is possible to confirm that energy is being
exchanged simply by feeling the ducts. If the Fresh
Air duct from the unit into the room is closer to
room temperature than to the outside temperature,
energy is being recovered.
Operating Controls
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 sen-
sors, and others. DDC systems may also control
the unit. Most control schemes will operate the
unit only when needed.
CONTINUOUS OPERATION
Continuous operation is acceptable in virtually all
conditions. Unit will not be damaged by continuous
operation as long as air flow 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.
OPERATION IN EXTREME COLD WEATHER
Unit is capable of operating at outside temperatures
down to -10°F, with indoor humidities below 40%,
without any internal frosting. Unit can operate at
more severe conditions occasionally with little or no
impact on its performance. At lower humidities, it
can operate at lower outside temperatures without
freezing the energy-exchange core.
OPERATION
Standard HE1.5XRT with single phase original
equipment motors are NOT suitable for use with
solid state speed control.
Three phase motors are NOT suitable for use with
solid state speed control. If speed control is desired
use the VFD option.
Single phase ECM motors are NOT suitable for use
with solid state speed control. They already have
speed control built into the motor electronics.
Le HE1.5XRT avec moteurs d’équipement d’origine
monophasés ne convient pas pour une utilisation avec
regulateur de vitesse electronique.
Moteurs de trois phase ne convient pas pour utilisation
avec regulateur de vitesse electronique. Si la régulation
de vitesse est souhaité, utiliser l’option VDF.
Moteurs d’une phase de l’ECM ne conviennent pas pour
une utilisation avec regulateur de vitesse electronique.
Ils ont déjà le contrôle de vitesse intégré dans le moteur
électronique.
WARNING
