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HE-Series Outdoor
ERV
MAINTENANCE
7.5 FAN MOTOR
The motor needs no lubrication. If necessary vacuum clean the blower wheels at the same time
you clean the face of the energy exchange element (annually).
7.4 FILTERS
Inspection and replacement of air filters is the most frequent maintenance issue. For units that
do not have filter air pressure differential sensors, filters must be visually inspected monthly, as
a minimum. If a filter looks discolored or dirty, REPLACE IT! When installing new filters, DO NOT
USE filter sprays. Residue from the filter spray could migrate to the enthalpic core media and
damage the cores.
For units that have filter air pressure differential sensors, a dirty filter alarm will occur on the
connected alarm or control device.
Filter cleanliness and replacement is the most important and frequent maintenance issue. Dirty
filters will cause an immediate reduction in operating efficiency of the ERV. Normally, filters
should be inspected and changed when they are dirty. Paper filters are not to be cleaned, they
are to be replaced.
In general, if a filter looks dirty, replace it. The best indication of dirty filters is to check the
pressure drop across the filter banks with an optional filter monitor. If it is not possible to check
the pressure drop, the rule of thumb would be to change the filters every two months.
7.6 ENTHALPIC CORE
7.6.1 Enthalpic Core Maintenance
The enthalpic core media is a fibrous material that must be kept clean at all times. As a
minimum, cores should be cleaned once per year.
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DO NOT WASH OR ALLOW THE ENTHALPIC CORES TO GET WET.
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DO NOT EXPOSE THE ENTHALPIC CORES TO HIGH HEAT OR FLAMES.
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DO NOT DIRECT COMPRESSED AIR AT THE CORE MEDIA.
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DO NOT REMOVE THE ENTHALPIC CORES FROM THE ERV UNLESS NECESSARY.
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USE CAUTION WHEN WORKING AROUND THE ENTHALPIC CORES. DO NOT DROP TOOLS OR
OTHER OBJECTS ON THE CORES, DO NOT BUMP OR TWIST THE CORES.
To access enthalpic cores for cleaning, remove the air filters.
To clean enthalpic cores, all exposed surfaces must be vacuumed with an attachment having
long, soft bristles. The greatest buildup of dirt and dust will normally be on the leading 1–2
inches of the inlet side (closest to the air filters).
7.6.2 Enthalpic Core Removal
Before removing enthalpic cores, switch the main disconnect to OFF. Open the door to the
Energy Recovery Module and simply pull the core straight out of its guides.
7.6.3 Enthalpic Core Replacement
Cores have foam gasketing on one end of each core. The core should be reinstalled so that the
foam gasketing is toward the back of the ERV and the core label is facing toward the front. See
Figure 7.8.0.
RISK OF DAMAGE TO ENTHALPIC CORES
Whenever working within the ERV cabinet, protect the enthalpic cores from accidental damage.
The core media is subject to damage from dropped tools or other foreign objects
CAUTION
