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1.800.627.4499
HE-Series Outdoor
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 HE1.5XRT 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 be variable speed, controlled by VFDs, a RenewAire Commercial Controller or by a BMS.
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 HE1.5XRT, which is the outdoor unit. For information on the indoor
version of this product, see the
HE1.5XIN Installation and Operation Manual
.
HE1.5XRT units are designed to be installed outdoors, mounted on either a factory-supplied curb or
on owner-supplied rails.
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 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 HE1.5XRT 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.
