Berner K-ZONE KZN1030A Installation and operating instructions

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ANSI/NSF 37
Air Curtain Fans for
Customer Entry
12CS For Outdoor Use
KZN/EZN
To meet NSF Standard 37 requirements, the air curtain width must be greater than or equal
to the opening width with a maximum mounting height of 7 feet for all EZN/KZN models.
READ AND SAVE
THESE INSTRUCTIONS
No. II-480
Date July, 2013
Installation & Maintenance Instructions
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
A. Use this unit only in the manner intended by the manufacturer. If you have any questions, contact the manufacturer.
B. Before servicing or cleaning unit, switch power o at service panel and lock the service disconnecting means to prevent power from being
switched on accidentally. When the service disconnecting means cannot be locked, securely fasten a prominent warning device, such as a
tag, to the service panel.
C. Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable codes and standards, including
re-rated construction.
D. Sucient air is needed for proper combustion and exhausting of gases through the ue (chimney) of fuel burning equipment to prevent
back drafting. Follow the heating equipment manufacturer’s guideline and safety standards such as those published by the National Fire
Protection Association (NFPA), and the American Society for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), and local
code authorities.
E. When cutting or drilling into wall or ceiling, do not damage electrical wiring and other hidden utilities.
TABLE OF CONTENTS
I. UNCRATING............................................................................................................................................................ 2
II. MOUNTING INSTRUCTIONS ............................................................................................................................... 2
III. WALL MOUNTING .............................................................................................................................................. 2
IV. SUSPENDED MOUNTING................................................................................................................................... 3
V. ELECTRICAL CONNECTIONS .............................................................................................................................. 3
VI. MECHANICAL CONNECTIONS ......................................................................................................................... 4
VII. AIRFLOW ADJUSTMENTS ................................................................................................................................ 4
VIII. MAINTENANCE AND CLEANING ................................................................................................................... 4
IX. SERVICE ............................................................................................................................................................... 4
X. WARRANTY .......................................................................................................................................................... 4
TROUBLESHOOTING ............................................................................................................................................... 5
IMPORTANT INSTRUCTIONS
E-ZONE
AIR CURTAIN
/AIR DOOR
MADE IN THE USA
K-ZONE
AIR CURTAIN
/AIR DOOR
MADE IN THE USA
Saving energy and creating healthy, comfortable environments

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I. UNCRATING
Carefully examine the carton(s) for damage before opening. If the carton
is damaged, immediately notify shipping company. If the unit(s) were
shipped on wooden skids, remove protective wood and banding straps
securing the carton(s) to the skid. Open the carton(s) and remove all pro-
tective packaging. Remove the plastic cover housing by lifting vertically.
Remove and discard four (4) nuts and washers holding the motor/blower
section to the bottom of the carton. Remove motor/blower section from
the carton.
CAUTION: ONLY LIFT THE UNIT BY GRASPING INLET RINGS ON THE
BLOWER HOUSING WITHOUT TOUCHING BLOWER WHEELS.
Immediately verify that the electrical rating nameplate located on the
cover matches electrical power supply available. Retain the shipping
carton(s) until the unit(s) are installed and properly operating.
ACCESSORIES: If the unit(s) were ordered with optional electrical acces-
sories (door switch, control panel, etc.), the accessories may be found in
the carton containing the unit or in a separate carton(s) accompanying
the unit(s). Check all of the cartons/skids for accessories before discard-
ing.
II. MOUNTING INSTRUCTIONS (General)
The E-Zone/K-Zone air door is designed to be an eective barrier
against cold drafts in the winter and hot air in the summer, ying
insects and airborne contaminants. To achieve optimum protec-
tion, the unit should be mounted on the inside of the building,
ush to the wall and as close to the top of the door opening as
possible. To ensure peak performance keep air stream free of
obstructions.
The air door will not perform properly if negative air pressure
exists in the building. Under these conditions, a means for
makeup air to the building must be provided so that the air
pressure on both sides of the opening is in balance.
Before mounting the unit, check the supporting structure to verify
that it has sucient load-carrying capacity to support the weight
of the unit(s).The mounting hardware (supplied by others) should
be capable of supporting a minimum of three (3) times the weight
of the unit. See TABLE 1.
WARNING: Use caution when mounting the air curtain to
ensure adequate clearance is provided for variable speed
control knob located on unit bottom. Failure to do so will
result in permanent damage to the controller.
A. When determining the mounting location for the unit(s), make
sure that nothing interferes with the curtain of air developed
when the discharge vanes are directed from 0° to 20° toward
the door opening. If the air stream strikes any obstruction
(the top edge of the doorway, a door opening device, etc.),
the eectiveness of the unit will be greatly reduced.
See FIGURE 1
B. For optimum performance, the bottom of the unit (discharge
nozzle) should be no more than 1”above the top of the door
opening with the unit mounted ush to the wall. If the unit
must be mounted higher, it must be spaced out from the wall
3/8” for every inch the unit is above the door opening. Any
void between the air door and the wall should be sealed along
the full length of the unit. See FIGURE 2
C. Proceed to Section III-WALL MOUNTING
III. WALL MOUNTING
A. Determine the location on the wall above the opening where
the air curtain will be mounted. This location should center
the unit over the opening and provide suitable mounting
support. It is recommended to use at least four locations that
correspond to the outer corners of the wall mounting plate.
See FIGURE 3.
B. Prepare the wall as necessary for the wall mounting plate
anchors (by others).
C. Drill holes in the wall mounting plate to correspond to the
locations on the wall.
FIGURE 1 - Air Stream
TABLE 1 - Weight Chart
FIGURE 2 - Positioning of Air Door
MODEL Net Weight Ambient (lbs)
EZN/KZN1030A 33
EZN/KZN1036A 35
EZN/KZN1042A 38
EZN/KZN1048A 42
EZN/KZN1060A 49
EZN/KZN1072A 56
EZN/KZN2084A 81
EZN/KZN2096A 87
EZN/KZN2108A 94
EZN/KZN2120A 100

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D. Anchor the wall mounting plate over the door opening with
the mounting tabs pointing upwards.
E. Raise the unit over the door (air discharge nozzle facing down)
and on to the mounting plate. First, tilt the unit upward
matching the holes in the frame with the tabs on the mount-
ing plate. See FIGURE 4.
F. Lower the unit into place allowing it to rest on the mounting
plate. The unit ange should rest above the mounting plate
ange.
G. After the unit is securely seated to the mounting plate, install
the locking screws along the bottom ange. See FIGURE 4.
IV. SUSPENDED MOUNTING
(Ceiling Suspension)
A. When the unit is top mounted, the wall mounting plate is
designed to store on the back of unit for future use.
B. Four (4) factory installed #10-24 threaded inserts are located
on the top of the unit for top suspension mounting.
See Figure 5
C. Determine the exact mounting location of the air door unit.
D. The top of the unit is provided with an electrical knockout
for power connection. Remove the wiring tray
compartment cover. Remove the knockout and attach
necessary electrical hardware. Save the wiring diagram
found inside of wiring tray.
E. Attach #10-24 threaded rods, or other suitable hardware to
the top mounted threaded inserts.
TABLE 2 - Motor Amp Ratings
** Operation at 50 HZ will generate approximately a 17% reduction in performance.
FIGURE 3 - Positioning of Mounting Plate
FIGURE 4 - Attaching Unit to Mounting Plate
F. Proceed to Section V - Electrical Connections
V. ELECTRICAL CONNECTIONS
All electrical wiring and connections MUST be performed by
qualied personnel in accordance with the latest edition of
the National Electrical Code ANSI/NFPA No. 70 or, in Canada,
the Canadian Electrical Code, Part 1-C.S.A. Standard C22.1 and
local codes and regulations.
A. Check the rating nameplate on the unit for supply voltage and
current requirements. A separate line voltage supply with a
suitable branch circuit protection device should be run directly
from the main electrical panel to the unit. A disconnect switch
for each branch circuit is a required part of this installation.
See TABLE 2
B. All eld wiring must be copper with a minimum insulation of
60°C within approved conduit. If any of the wire supplied with
the unit must be replaced, it must be replaced with copper
wiring with a minimum insulation of 90°C.
C. Remove the wiring compartment cover located on the top of
the unit. See FIGURE 6
D. A ½” knockout is provided next to the wiring compartment
FIGURE 5 - Suspended Mounting
EZN/KZN MOTOR DATA
Model #Motors
@HP
120 V 1ø 208/240 V 1ø
Total Motor
Amps
Total Motor
Amps
EZN/KZN1036A
1@1/5 3.4 1.7
EZN/KZN1042A
EZN/KZN1048A
EZN/KZN1060A
EZN/KZN1072A
EZN/KZN2084A
2@1/5 6.8 3.4
EZN/KZN2096A
EZN/KZN2108A
EZN/KZN2120A

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FIGURE 7 - Air Flow Adjustment
to connect electrical conduit. Connect all supply and control
circuit wires according to the wiring diagram.
E. Reinstall the wiring compartment cover.
F. Switch on the power at the service disconnect. Turn on the
unit and check the sequence of operation against the wiring
diagram.
G. Proceed to Section VI-AIRFLOW ADJUSTMENTS.
VI. AIRFLOW ADJUSTMENTS
A. AIR STREAM SPLIT ADJUSTMENT
1. With the air door operating and the door in its full open
position, check to see that nothing is obstructing the air
ow at the discharge nozzle vanes.
2. Find the air stream split location. Hold a handkerchief, by
its corners, approximately 12”above the oor. Gently move
the handkerchief back and forth in the doorway. Make sure
the air is being directed to both the inside and the outside.
The split location is indicated where the handkerchief is
vertical with minimal or no uttering. See FIGURE 7.
3. Adjust the discharge nozzle vanes so the split location is
approximately 3”outside the doorway. This is accomplished
by rst de-energizing the unit. Remove the cover hous-
ing, loosen the nozzle vane locking screws and adjusting
vanes.
B. LOW SPEED ADJUSTMENT
NOTE: This Section is applicable to units with a factory sup-
plied speed controller only. A speed control device shall
not be used on units required to comply with EPH or NSF
Standard 37.
NOTE: Variable speed controller is not factory set for low
speed setting. If low speed setting is desired it must be
done after installation.
WARNING: Changing the low speed setting too much can
cause the motor to stall on low speed.
1. Turn the speed controller knob clockwise to low speed.
2. Insert a small phillips screwdriver in the hole located next
to the speed control knob and slowly turn adjusting screw
clockwise to lower the speed. A small degree of rotation
is required to change speed. Wait for speed to settle after
each turn.
VII. MAINTENANCE AND CLEANING
CAUTION: ELECTRIC SHOCK HAZARD Disconnect power
whenever servicing unit. More than one disconnect may
be required to de-energize unit.
Keep your air door operating at peak eciency by cleaning
the blower wheels, motor(s) and intake grille. Buildup 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.
B. Remove the intake grille by removing all phillips head screws
around edge. See FIGURE 6.
C. Vacuum and scrape (if necessary) to remove the buildup 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
OFTHE UNIT ORWEAR SAFETY GOGGLES AS LOOSE DEBRIS
MAY BE PRESENT AND MAY EXIT THE NOZZLE.
VIII. SERVICE
CAUTION: ELECTRIC SHOCK HAZARD Disconnect power
whenever servicing unit. More than one disconnect may
be required to de-energize unit.
Any service performed on the EZN/KZN Series air door MUST be
done by qualied personnel.
FIGURE 6 - Junction Box

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• Airstreamtoweak 
• Airsteamhitsobstruction
• Negativepressure
• Shaftrotatinginsidefan
• Nozzlenotangledoutfarenough
• Airmovementtoocold
• Pushingairoutsidebuilding
SEEAIRISNOTHITTINGFLOORSYMPTOMS
• Adjustnozzletoproperposition,adjustmotor
speed; see installation instructions
• Removeobstructionorrepositionaircurtain
(moveout3/8”forevery1”upfromthedoor)
• Relievenegativepressurebyproviding
makeupair
• Tightensetscrews/Replacefan
• Adjustnozzleangletooutside
• Addauxiliaryheattoovercomewindchill
• Adjustdischargeanglebackintobuilding
AIR IS NOT HITTING
FLOOR
UNEVEN AIR
EXCESSIVE AIR
MOVEMENT AT DOOR-
WAY
NO AIR • ElectricalPowersupplylineopen(no
power)
• Fuseblown/circuitbreakertripped
• Motoroverloadtripped
• Failedswitch
• Brokenfanhub
• Shaftrotatinginsidefan
• Broken/Loosecoupling
• Selectorswitchisinoffposition
• Doorlimitswitchnotoperating
• Airdirectionaldischargevanesmisadjusted
• Inadequateintakeclearance
• Blowermotoroperatesbelowspeed
• Fanrubbingagainsthousing
• Fanwheelscloggedwithdirt
• Checkpowersource,checkmethodofcontrol
in ON position
• Replacefuse(s)/resetbreaker
• Internallyprotectedmotor-shouldresetauto-
matically after cool-down, if not, replace mo-
tor.
• Replaceswitch
• Replacefan
• Tightensetscrews/tightenfanonshaft
• Replace/Tightencoupling
• Turnswitchto“ON”position
• Repairorreplacelimitswitch
• Adjustvanestoproperposition,seeinstruc-
tions
• Moveaircurtainorremoveobstruction
 Provideadequatespaceforaircurtain
• Impropervoltage
• Freefanfromhousing
• Cleanandvacuumfanwheels
MOTOR RUNNING/FANS ARE NOT ROTATING
MINIMUM AIR
ELECTRICAL CONTROLS NOT FUNCTIONING WHEN DOOR IS OPEN
TROUBLESHOOTING
SYMPTOMS REMEDY
CAUSE
Berner air doors require very little servicing. All parts are eas-
ily accessible for periodic inspection and maintenance. Units
should be cleaned at least twice a year.Your particular applica-
tion (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 bearings and require no maintenance.
A. UNIT MOUNTED ROTARY SWITCH REMOVAL
The variable speed switch must be removed from the bottom
of the unit.
1. Disconnect power to the unit.
2. Remove the intake grille by removing all phillips head
screws around edge. See FIGURE 6.
3. Disconnect and mark the wires in the unit connected to
the switch.
4. Remove the knob from the switch by pulling it straight
away from the unit.
5. Remove the two phillips head screws holding the switch
and nameplate to the unit.
6. Remove the switch by pushing it into the unit.
7. Reinstall in reverse order of removal.
B. FAN AND MOTOR REMOVAL
1. Disconnect power to the unit.
2. Remove the intake grille by removing all phillips head
screws around edge. See FIGURE 6.
3. Unplug motor harness from motor and remove necessary
wiring.
4. Using a 1/8”Allen wrench, loosen each set screw attaching
fan(s) to motor.
5. While holding the motor in place, loosen and remove
the motor clips.
6. Slide the fans toward the motor so that the ball bearings
on the outer fan shaft are exposed.
7. Slowly roll the motor out of the motor mount cradle for-
ward and down.The hubs of the fans are exible enough
to allow the motor to move before the fans’ outer ball
bearings pull out of the unit.
8. Reinstall in reverse order of removal.

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BERNER INTERNATIONAL CORPORATION
New Castle, Pennsylvania
724-658-3551 • 1-800-245-4455 • www.berner.com • [e-mail]
© Copyright 2013 Berner International Corporation MADE IN U.S.A.
Berner reserves the right to alter specifications without prior notice.
X. WARRANTY
Berner International Corp. ("The Company") warrants all new equipment to be free of defects in workmanship and material for a period
of ve years (5 years) on unheated models and two years (2 years) on heated models from the original date of shipment, provided
the equipment has been properly cared for, installed and operated in accordance with the limits specied on the nameplate and The
Company’s instructions.
The Company will correct by repair or replacement, at its option and expense, any proven defects in said apparatus, subject to the above
conditions, provided that immediate written notice of such defects is given to The Company. The warranty does not include any labor
incurred for the removal or installation of defective part(s). The Company reserves the right to inspect, or have inspected by a qualied
representative, any apparatus at the place of installation before authorizing repair or replacement. Repair or replacement will be made
F.O.B. factory with any applicable transportation charges to be borne by the customer. Merchandise not of The Company’s manufacture
supplied in piece, or in component assemblies, is not covered by the above warranty, but The Company will give the customer the benet
of any adjustment as made with the Manufacturer.
This warranty is void if the apparatus has been tampered with in any way or shows evidence of misuse.
The Company will not assume any expense or liability for repairs made outside its factory without proper written consent from its service
manager, nor for any transportation charges on apparatus returned to the factory without written authorization by The Company.
Nothing in the above warranty provisions, however, shall impose any liability or obligation of any type, nature or description upon Berner
International if Berner has not received payment in full for the apparatus in question.
THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HERE OF INCLUDING
THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
LIMITATION OF DAMAGES
Notwithstanding anything to the contrary above, customer’s exclusive remedy for any and all losses or damages resulting
from the sale of The Company’s equipment under this agreement, including but not limited to, any allegations of breach of
warranty, breach of contract, negligence or strict liability, shall be limited, at The Company’s option, to either the return of
the purchase price or the replacement of the particular equipment for which a claim is made and proved. In no event shallThe
Company be liable for any special, consequential, incidental or indirect losses or damages from the sale of The Company’s
equipment under this agreement.
SERIAL NUMBER MODEL NUMBER DATE PURCHASED