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HE-Series Outdoor
ERV
COMPONENT DESCRIPTIONS
2.0 COMPONENT DESCRIPTIONS
2.1 CABINET
The cabinet for the HE1.5XRT is made of 20 gauge galvanized steel and has 1" thick high-
density, foil-backed insulation on the inside. Units are available in either single-wall or double-
wall construction. Doors are hinged and are fitted with stainless steel machine screws through
the faces to prevent accidental opening of the doors when the unit is in operation. Doors may be
completely removed by removing the hinge pins. All units are equipped with adjustable-height
leveling legs for purposes of leveling the unit. Duct flanges are provided at all four airstream
openings for connection of field-supplied ductwork.
2.2 ENTHALPIC CORES
All HE1.5XRT ERVs use a static-plate enthalpic core. The enthalpic cores transfer both latent
and sensible energies between the airstreams. Gasketing is pre-installed on the cores and must
be positioned to provide a proper air seal. For information on annual maintenance of the cores,
see Section 7.0 Maintenance in this manual.
2.3 FAN/MOTOR ASSEMBLIES
2.4 E-BOX
Every HE1.5XRT is equipped with what is known as an “E-Box.” High-voltage supply wiring and
low-voltage control wiring is all terminated here. If optional integrated programmable controls
are installed, an additional 24 VAC transformer is installed here to power both the controller and
its dedicated sensors.
2.5 FILTERS
All HE1.5XRT units come equipped with four MERV 8 pleated filters. MERV 13 filters can be
ordered as an accessory and are shipped loose.
u
(2) 14" x 20" x 2" and (2) 16" x 20" x 2" (nominal) pleated filters. Actual size: 13.5" x 19.5" x
1.75" and 15.5" x 19.5" x 1.75"
u
Optionally, (4) 15" x 20" x 2" (nominal) pleated filters. Actual size: 14.5" x 19.5" x 1.75"
u
Minimum recommended effectiveness: MERV 6
There are two fan and motor assemblies in each ERV.
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GROUND BUS
DISCONNECT SWITCH
POWER SUPPLY WIRING
CONNECTED HERE ON TOP
OF DISCONNECT SWITCH
OPTIONAL UNIT FUSING
24 VAC STEP-DOWN TRANSFORMER
(WITH BUILT-IN CIRCUIT BREAKER)
LOW-VOLTAGE TERMINAL STRIP
(ALL CONTROL WIRING IS CONNECTED HERE)
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FIGURE 2.4.0 E-BOX WITH MOTOR STARTERS
Low airflow can cause
fouling of the enthalpic
cores. The ERV must
never be operated without
clean filters in place and
minimum airflow must be
greater than 250 CFM per
full-sized core.
CAUTION
