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21
Servicing your HRV on a regular schedule will
result in optimum operating efficiencies and
prolonged life of the equipment.
Due to numerous applications in which this
equipment can be installed, it is difficult to predict
servicing intervals. In certain situations where there
is heavy smoke, servicing the equipment every one -
two months may be needed; whereas ventilating a
meeting room for example for carbon dioxide may
only need service every six months to a year.
Motor
Access to the motor is through the front service
doors. Note heat exchanger core can be removed to
provide more room. See CORE in this section.
The motor is a permanent split capacitor type (PSC)
which uses a sleeve mechanism to steady the shaft.
There is an oil wick beside the sleeve which supplies
oil to it on a continuous basis.
If the motor does not have oil tubes, no maintenance
is required.
Access to the wick is through oil tubes, (two per
motor) located in the motor case itself. These oil
tubes are either capped with yellow plugs, (which
need to be removed for oiling) or have clear tubes
protruding from them.
In either case an oiling device such as an “Oil
Telespout” filled with 20 S.A.E. non-detergent electric
motor oil should be used to put oil inside the tubes. A
couple of drops of oil once a year will do.
DO NOT OVER OIL!
HRV Core
The heat exchange core is accessible through the
front service door. Special care and attention should
be given to this component as the edges may be
sharp, and the core itself susceptible to damage
if dropped.
When removing the core, the location it is removed
from should be noted.
The core is removed by carefully pulling the core out-
ward from the unit, sliding it evenly along its “H chan-
nel” supports found in each corner of the core. Note
the core may have some resistance when
sliding out. Avoid tilting the core as this will result in
its edges catching the H channel and temporarily
preventing its removal.
In most cases, washing the core in a mild
detergent and warm water will be all that
is needed to completely clean them. Do not use
harsh chemicals as this may cause corrosion in the
HRV. The time between core service will depend
on the application the HRV has been installed in.
It can be as often as one - two months or at the very
least, cleaned every six months. When reinstalling
the core you must note foam location and drip
edge location for proper core placement.
See diagram below.
Service/Maintenance
DRAIN PANS (not on all models)
FILTER
FILTER
DOUBLE
DRIP
EDGES
DOUBLE
DRIP EDGE
CORE
Models 700, 1200
Note location and arrangement of cores and filters when removing.
Models 700, 1200 and 1000