Operation Instructions; Maintenance And Cleaning; Service - Berner IDC12 Series Installation & Maintenance Instructions Manual

IX. OPERATING INSTRUCTIONS
A. GENERAL OPERATION
Air curtain operation may be divided into four areas:
control package, fan activation, fan speed selection,
and heat activation. The air curtain must be properly
installed before it is used.
1. Control packages control the unit's sequence of operation.
Unit modes/control packages are built into the unit and may
not be changed in the field.. Refer to your wiring diagram
for specifics about activation connections and sequence of
operation.
a. Basic Control Package – The unit is activated by a door
switch. The door switch may be line voltage or low
voltage (24V).
b. Deluxe Control Package – The unit is activated by a door
switch, but has a factory installed time delay allowing
the unit to keep running for a period of time after the
door closes.
c. Comfort Plus Control Package – Available only on heated
units, the unit is activated by the door switch or by the
thermostat to provide supplemental heating.
NOTE: Not available with 575V motors.
2. Unheated units will have the fans activated by a door switch
or sensor. The unit may be single speed and require no fan
speed selector (On/Off ), or may have multiple fan speeds
which require either a unit or remote mounted switch
(Off, High, Med, Low).
3. Heated units will have fans activated by a door switch or
sensor, but may also be activated by the thermostat in
Comfort Plus Mode. The unit may be single speed and
controlled by either a unit or remote mounted switch (Fan,
Off, Heat), or may have multiple fan speeds which can be set
by either a unit or remote mounted switch (Low, Med, High,
Off, Low heat, Med Heat, High Heat).
4. Heat activation is controlled by either a unit or remote
mounted thermostat, and a unit or remote mounted switch.
B. AIR STREAM ADJUSTMENT
1. With the air curtain operating and the door in its full open
position, check to see that nothing is obstructing the airflow
at the discharge nozzle vanes.
FIGURE 11 - Air Stream Split
2. Find the air stream split location. Hold a handkerchief by
its corners, approximately 12" above the floor. Gently move
the handkerchief back and forth in the doorway. Make sure
the air is being directed to both the inside and the outside.
See Figure 11. The split location is indicated where the
handkerchief is vertical with minimal or no fluttering.
3. The split location should be approximately 3" outside the
doorway. If necessary adjust the discharge nozzle vanes by
de-energizing the unit, loosening the nozzle vane locking
screws and adjusting vanes.
X. MAINTENANCE AND CLEANING
CAUTION: ELECTRIC SHOCK HAZARD: Disconnect power
when servicing unit. More than one disconnect may be
required to de-energize unit.
Keep your air curtain operating at peak efficiency by cleaning
the blower wheels, motor(s) and intake grille. Build up of
dust on the blower wheels can cause vibration, noise and
excessive wear on the motor bearings. The frequency of
cleaning will depend on the environment where the unit is
operating.
Dirty, dusty or greasy environments could require a cleaning
schedule of once every two months. If the environment is not
that dirty, the unit(s) should be scheduled for cleaning a
minimum of once every (6) months.
To access the interior of the unit:
A. Disconnect the power to the unit and remove the intake
grille by removing the screws on the top and bottom of the
screen.
B. Remove the bottom access panel by removing the phillips
head screws on the bottom of the unit.
C. Vacuum and scrape (if necessary) to remove the build up of
dirt and debris. The motor(s) are permanently lubricated and
require no additional lubrication. Reinstall the cover
and intake grille.
D. Switch the power on after cleaning. CAUTION: STAND
CLEAR OF THE UNIT OR WEAR SAFETY GOGGLES AS
LOOSE DEBRIS MAY BE PRESENT AND MAY EXIT THE
NOZZLE.
XI. SERVICE
CAUTION: ELECTRIC SHOCK HAZARD: Disconnect power
when servicing unit. More than one disconnect may be
required to de-energize unit.
Any service performed on the IDC12/IDC14 Series air curtain
MUST be done by qualified personnal
Berner air doors require very little servicing. All parts are
easily accessible for periodic inspection and maintenance.
Units should be cleaned at least twice a year. Your particular
application (the amount of dirt and dust in the air) and location
of the unit(s) will determine how often your unit(s) will need
to be cleaned and serviced. All motors have permanently
lubricated, sealed, sleeve or ball bearings and require no
maintenance.
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