JOHNSON CONTROLS
73
SECTION 3 - MAINTENANCE
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
3
Inspect Wheel Drive Components
Rotor Bearings
- The main rotor bearings have been
sized for an L-10 life of a minimum of 25 years; oper-
ating 24 hours per day, 7 days a week. The main reason
that a main bearing would fail is lack of lubrication or
the existing grease hardens in the bearing due to evapo-
ration or by penetration of moisture causing corrosion.
The bearings are filled with grease at the factory or at
the time of start-up to eliminate a future failure.
Add a small amount of grease every six months to
maintain fresh grease on the inside of the bearing. Wipe
off any excess purged grease to avoid it getting blown
onto the wheel surface. All bearings are greased with
a Dow Corning Molycote BR2 Plus Grease, which is
available through most bearing distributors
Drive System
- The motor does not require any main-
tenance and has permanently lubricated bearings. The
speed reducer is grease lubricated as well and does not
require any maintenance. Life expectancy is in excess
of 10 years.
The drive belt tension does not need any adjustment,
due to the gravity based mounting base used. The B-
type V-belts are installed with a B-437 belt connector
manufactured by FLEXCO. This connector will even-
tually wear out and need to be replaced. A typical life
span is five to 10 years, depending on the environmen-
tal condition.
INNERGY TECH
®
Cleaning the Wheel
In most applications, it is not necessary to clean the
media of the wheel because the wheel rotates. Incom-
ing and outgoing airstreams are constantly blowing
debris out of the media during operation. If cleaning
is needed, clean the media with a vacuum cleaner or
pressurized air. It is not recommended to use any type
of solvent or detergent on the wheel because it may
cause damage to the media or the material used to build
the wheel.
Adjusting Air Seals
The Innergy tech energy recovery wheels are equipped
with our AirLoop
TM
labyrinth seals facing the media,
low friction side seals along the depth of the rotor and
S-type labyrinth peripheral seals along the outer edge
of the rotor as shown on the seal general overview
drawing below. While the side seals and peripheral
seals are factory adjusted and don’t need further adjust-
ment, the AirLoop
TM
labyrinth seals should be verified
prior to start-up and adjusted if needed. See
As illustrated in
, the correct
adjustment of our AirLoop
TM
labyrinth seal is obtained
by allowing it to barely touch the media before tighten-
ing the screws. If an initial gap can be seen between the
seal and media, the seal is installed too far and should
be moved closer until it touches the media. On the
other hand, if any deformation to the lips can be seen,
it means the seal is installed too close and should be
moved back until the lips are straight again.
LD17097
FIGURE 76 -
ERW SEAL LOCATIONS
