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HE-Series Outdoor
ERV
OPERATION
6.0 OPERATION
6.1 PRINCIPLE 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 blower is
able to move air through the enthalpic core.
6.2 PRE-START-UP
6.2.1 Verify Voltages
Using a voltmeter, test the input voltages as supplied to the disconnect switch. Refer to Digit 13
of the unit Configuration Code to find the rated voltage. The supplied voltage must be /-
10% of the rated voltage.
6.2.2 Verify Transformer Wiring
Units with 230 VAC power source are shipped with the transformer wired for 208 VAC. If the
unit is receiving 230 VAC, make sure the black primary-side wire on the transformer’s 208 V
terminal has been moved to the 230 V terminal.
6.2.3 Inspect Filters
Clean filters must be installed prior to fan start-up.
6.2.4 Inspect Foam Gasketing
Inspect the gasketing to make sure there are no gaps allowing air movement around the cores
or filters.
6.2.5 Inspect Fans
Prior to start-up, the fans should be rotated by hand to make sure that the impeller is not
rubbing anywhere and that they turn freely.
6.2.6 Inspect and Clean the Cabinet Interior
During the construction and installation phases of a project, dust, dirt and debris will often
accumulate inside a unit. Thoroughly clean the inside of the unit by vacuuming and/or wiping
metal surfaces with a damp rag.
6.2.7 Inspect Ductwork Connections
Ducts attached to the ERV must be firmly attached, sealed and supported in accordance with
installation instructions and SMACNA guidelines.
