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1.800.627.4499
HE-Series Indoor
ERV
1.0 OVERVIEW
NOTE: This unit is
an Energy Recovery
Ventilator, or ERV.
It is commonly referred to
throughout this manual as
an ERV.
1.1 DESCRIPTION
OVERVIEW
The HE1.5XIN Energy Recovery Ventilator is a device for recovering both sensible energy (heat) and
latent energy (moisture) from the Exhaust Air from an Occupied Space and injecting those energies
into an incoming Outside Airstream. It accomplishes this task by forcing the two airstreams through
enthalpic cores, where the energy exchange takes place. The two airstreams pass through the
enthalpic cores at right angles and the airstreams never mix together. See Section 2.2 Enthalpic
Cores in this manual.
Each ERV has two electric blowers, one for each airstream. Fan speeds can be either single
speed, or they can have electronically commutated motors. There are a number of different
control devices available to control the operation or speed of the unit fans. For further
information on available control accessories, see the
HE RenewAire catalog.
There are two types of HE1.5X units, one for indoor installations and one for rooftop, or outdoor,
installation. This manual is for the HE1.5XIN which is the indoor unit. For information on the outdoor
version of this product, see the
HE1.5XRT Installation and Operation Manual
.
These ERVs are commonly installed as part of an air handling system that provides heating and
cooling of Supply Air. They can also be installed to operate as stand-alone devices when ducted
directly to and from the Occupied Space.
Each HE1.5XIN unit is available in either a horizontal or a vertical model. The difference between
the two models is in the airflow/ducting configuration. Horizontally ducted units are identified by the
model name HE1.5XINH and vertically ducted units are identified as model HE1.5XINV.
Each unit has an integral 24 VAC power supply that is used internally and can also be used as a
power source for other optional control devices.
The HE1.5XIN units are low-maintenance, requiring periodic replacement of the air filters and
annual vacuuming of the enthalpic cores. See Section 7.0 Unit Maintenance in this manual.
IMPORTANT
It is important to understand and use the equipment airstream terminology as it is used in this
manual. The airstreams are defined as:
u
OUTSIDE AIR (OA): Air taken from the external atmosphere and, therefore, not previously circu-
lated through the system.
u
FRESH AIR (FA): Air that is downstream of the enthalpic cores and is ready for conditioning or
for return to the Occupied Space.
u
RETURN AIR (RA): Air that is returned to the ERV from a conditioned space.
u
EXHAUST AIR (EA): Air that is removed from a heating or cooling appliance or from the Occu-
pied Space and discharged.
