Bryant ERVBBLHU1150, Installation, Start-Up, And Operating Instructions Manual, Page: 10 / 16

I. DOOR
ERV door can be removed by unlatching brief case style latches,
then lifting door up and sliding it sideways (See Fig. 17). Door
must be in place and secured shut for proper operation.
II. FILTER
Filters in ERV are washable and should be cleaned every 3
months. Use a vacuum cleaner to remove heaviest portion of
accumulated dust, then wash in lukewarm water. Allow filter to
completely dry before re-installing. A dirty air filter will cause
excessive strain on the blower motor. Never operate unit without
a filter (See Fig. 17).
In addition, regularly check and clean screens on exterior intake
and exhaust hoods when necessary.
CAUTION:
UNIT COMPONENT DAMAGE HAZ-
ARD
Failure to follow this caution may result in unit compo-
nent damage.
DO NOT clean filters in a dishwasher and DO NOT dry
them with a heating appliance or permanent damage will
result.
III. BLOWER MOTOR AND WHEEL
ERV blower motors are factory lubricated for life. Lubricating
bearings is not recommended. However, inspect and clean any
accumulated dirt and grease from blower motor and wheel
annually.
IV. CLEANING CORE
ERV is equipped with a special energy recovery core which is
made out of paper and allows transfer of sensible and latent
energy. The core should always be vacuumed only every 3 months
to remove dust and dirt that could prevent transfer of energy (See
Fig. 17).
NOTE: The core should only be serviced when outdoor tempera-
ture is between 60°F and 75°F and it is dry.
CAUTION: DO NOT use water to clean core or damage
will result. In addition, before servicing or removing the
core inspect the edges to see if they appear soft (or
slightly expanded). This can be normal and due to
moisture in the air. DO NOT handle or service core until
it is dry or air passages can become damaged and/or
closed.
TROUBLESHOOTING
WARNING: ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off
main power to system. There may be more than one
disconnect switch.
CAUTION: CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing and gloves when
handling parts.
NOTE:
Reference Table 3 Troubleshooting Chart
This can be a quick guide in resolving unit problems. It is also
recommended to review and understand Wall Control Board
Operation and Care and Maintenance sections before continuing.
There are three main parts to focus on when troubleshooting ERV
unit:
1. Wall Control
2. Electronic control board
3. Blower motor
I. WALL CONTROL
Use Table 1 to determine if wall control is operating correctly. Use
Fig. 9 to check control wire connections.
NOTE: The electronic control board and wall control operate on
12vdc.
II. CONTROL BOARD
Electronic control board must have wall control attached before
unit will function properly. Also, configuration jumpers located on
control board must match configuration setup shown on Fig. 16
under Jumper Table. In addition, outside air thermistor must be
connected to control board for it to operate properly. See Table 4,
Temperature —vs— Ohm Chart, for valid temperature range.
III. BLOWER MOTOR
The ERV blower motor operates on 115vac, with 2–speed opera-
tion.
The easiest way to check blower speed operation is to use the wall
control and initiate a low-speed blower and high-speed blower
operation using intermittent mode (See Table 1, standard control
operation).
NOTE: If, after making the following test, you still hear relays
clicking upon charge, carefully check wiring, blower capacitor and
blowers.
Alternate procedure to check blower speed:
Fig. 14–Airflow During Exchange
A99269
STALE AIR
TO OUTSIDE
FRESH AIR
TO BUILDING
FRESH AIR
FROM OUTSIDE
STALE AIR
FROM BUILDING
—10—