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1.800.627.4499
HE-Series Indoor
ERV
INSTALLATION
5.3 SUSPENDED MOUNT
HE1.5XIN units can also be suspended from a ceiling or other structural member. Screw or bolt
mounting straps or brackets directly to the sheet metal case as necessary. Remove the access
doors before installing screws—make sure your fasteners do not damage internal parts. Do not
screw into the access doors.
Install 3/8-16" bolts through the channels, into the bottom of the unit. Support the channels
from threaded rods, located in an appropriate location that maintains required service
clearances.
NOTE: It is the
installer’s respon-
sibility to select
appropriate materials
capable of safely support-
ing the weight of the ERV
and all attached hardware,
such as ductwork. It is the
installer’s responsibility to
determine the location of
the ERV and the needed
supporting threaded rods.
All such installations must
be reviewed and approved
by an engineer.
Before bringing power to the unit check unit nameplate to confirm it matches the voltage and
phase of the power you are supplying. Remember that your field connections need to be accessi-
ble for inspection.
CAUTION
5.4 ELECTRICAL REQUIREMENTS
Electrical Options and Ratings are identified on the Unit Label (located near electrical box). Find
the complete Unit Model Number in the lower left corner of the Unit Label.
NOTE: If your unit
is equipped with
EC Motors, please
refer to “EC Motor Supple-
mental Manual” for more
detail.
Use conduit, strain reliefs,
etc. as required by code to
secure the field wiring.
NOTE: Standard
HE1.5XIN with
single phase original
equipment motors
are NOT suitable for use
with solid state speed
control.
NOTE: Le HE1.5XIN
avec moteurs d’équi-
pement d’origine
monophasés sont adaptés
pour une utilisation avec
regulateur de vitesse elec-
tronique.
5.4.1 Electronically Commutated Motors
These ERVs may be ordered with factory-installed features including Electronically Commutated
(EC) Motors. Consult the
EC Motor Supplemental Manual
for more information.
Electrical Options are identified on the Unit Label located near electrical box on the outside of
the unit. Find the complete Unit Model Number in the lower left corner of the Unit Label. Use the
configuration chart to determine motor power and voltage installed in your HE1.5XIN.
Use conduit, strain reliefs, etc. as required by code to secure the field wiring. Electrical
knockouts are provided for alternate line voltage and voltage control locations for field wiring to
the internal electrical box. If the alternate sites are desired for field wiring then carefully remove
the knockout plugs and foam insulating plugs from the alternate sites and install them in the
open knockout locations.
5.4.2 Low Voltage Control System
This ERV is provided with a Class II 24 VAC power supply system that operates the unit’s
contactor(s) for HE1.5XIN. The ERV’s 24 VAC Power Supply can also be used to power the
externally-installed controls system: up to 8 VA of power is available.
The unit’s power supply system includes isolation relay(s) so you can use external controls
whose contact ratings are as low as 50 mA (1.2 VA). Also, it is possible to operate the isolation
relays with 24 VAC power from an external source (with proper wiring connections).
A built-in circuit-breaker prevents damage to the transformer and other low-voltage
components in the event of a short-circuit or overload. In extreme cases, the transformer itself
is designed to fail safely.
Specifications:
u
Nominal Output Voltage under load: 24 VAC
u
Typical Output Voltage at no load: 29–31 V
u
Minimum contact rating for connected control device: 50 mA (1.2 VA)
u
Circuit Breaker Trip Point: 3 A
