BERNER ARD12 Air Curtain Instruction Manual

BERNER ARD12 Air Curtain Instruction Manual

Installation & Maintenance Instructions

WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:

• Read all instructions before installing or using this air curtain.
• Use this unit only in the manner intended by the manufacturer and described in this manual. Any other use not recommended by the manufacturer may cause fire, electric shock, or injury to persons. If you have any questions, contact the manufacturer.
• Before servicing or cleaning the unit, switch the power off at the 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.
• Installation work and electrical wiring must be done by a qualified person(s) by all applicable national and local codes having jurisdiction, including fire-rated construction. ELECTRICAL CONNECTIONS (NEC Code ANSI/NFPA No. 70).
• When cutting or drilling into a wall or ceiling, do not damage electrical wiring and other hidden utilities.
• To reduce the risk of fire, do not store or use gasoline or other flammable vapors and liquids in the vicinity of the air curtain.
• This air curtain is hot when in use. To avoid burns, do not let bare skin touch hot surfaces. Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, etc., and curtains at least 1 inch from the top, back, front, and sides and at least 6 feet from the discharge of the air curtain.
• Extreme caution is necessary when any air curtain is used by or near children or invalids, and whenever the heater is left operating unattended.
• Do not operate any air curtain after it malfunctions. Disconnect power at the service panel and have the air curtain inspected by a reputable electrician before reusing it.
• To disconnect the air curtain, turn the controls to “off”, and turn off power to the air curtain circuit at the main disconnect panel.
• Do not insert or allow foreign objects to enter any ventilation or discharge opening as this may cause an electric shock or fire, or damage the air curtain.
• To prevent a possible fire, do not block the air intake or discharge of the air curtain in any manner.
• The air curtain has hot and arcing or sparking parts inside. Do not use it in areas where gasoline, paint, or flammable vapors or liquids are used or stored.
• This heater may include an audible or visual alarm to warn that parts of the heater are getting excessively hot. If the alarm sounds (or illuminates), immediately turn the heater off and inspect for any objects on or adjacent to the heater that may have blocked the airflow or otherwise caused high temperatures to have occurred. DO NOT OPERATE THE HEATER WITH THE ALARM SOUNDING (OR ILLUMINATING).

WHEN THE DOORS ARE OPEN™ save energy & create healthy, comfortable environments

UNCRATING

Carefully examine the carton(s) for damage. If the carton is damaged, immediately notify the shipping company. Do not delay in filing a claim. If the air curtain(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 protective packaging. Immediately verify that the electrical rating nameplate located on the cover matches the electrical power supply available. Retain the shipping carton(s) until the air curtain(s) are installed and properly operating.

ACCESSORIES: If the air curtain(s) were ordered with optional electrical accessories, the accessories will be found in the carton containing the air curtain or in a separate carton(s) accompanying the air curtain(s). Check all of the cartons/skids for accessories before discarding them.

MOUNTING PREPARATION

INDOOR MOUNTING ONLY – Environmental/Insect/Dust Control

• The Architectural Recessed 12/16 air curtain is designed to be an effective barrier against cold drafts in the winter and hot air in the summer. To achieve optimum protection, the unit should be mounted on the inside of the building, flush with the ceiling, so that the airstream can pass as close to the top of the door opening as possible. To ensure peak performance keep the air stream free of obstructions.
• The air curtain will not perform properly if negative air pressure exists in the building. Under these conditions, a means for making air to the building must be provided so that the air pressure on both sides of the opening is in balance.
• Before mounting the air curtain, check the supporting structure to verify that it has sufficient 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.
• 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 effectiveness of the unit will be greatly reduced.
• For optimum performance, the bottom of the discharge nozzle should be located in such a manner that it is spaced out from the wall 3/8” for every inch the unit is above the door opening.
• Suspend air curtain cabinet by attaching threaded rods to the unit and support structures. Adjust the unit position so the bottom of the cabinet is flush with the underside of the ceiling.
• Electric heated unit(s) shall:
  • Have a minimum clearance of at least 6’ between the bottom of the unit and the floor.
  • Be installed Indoors Only.
  • The unit is shipped without the front and back trim installed to protect it from shipping damage. This trim need not be installed until after the unit is hung. See Figure 2.

MOUNTING

• The ARD12 series air curtain enclosure is equipped with four 5/16”-18 threaded inserts on the top of the unit for suspended mounting. For lighter lifting the blower assembly may be removed so that the enclosure can be easily installed. See Section VIII: SERVICE for instructions on removing the blower assembly.

• The electrical junction box(s) is located on the outside of the enclosure on the left side (standard) of the unit.

• Determine the exact mounting location of the air curtain unit.

• Create structural attachment points to suspend the unit above the ceiling so that the unit is centered and parallel to the door opening.

• Suspend air curtain cabinet by attaching threaded rods to the unit and support structures. Adjust the unit position so the bottom of the cabinet is flush with the underside of the ceiling.

• Install the front and back trim using the provided fasteners.

• Finish off the ceiling edge as required.
  NOTE: Finishing materials must not overlap the bottom of the cabinet to allow the intake screen to open freely.

• If the blower assembly was removed, re-install it along with the nozzle surround and bottom access cover.

ELECTRICAL CONNECTIONS

All electrical wiring and connections MUST be performed by qualified personnel by 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 the voltage label on the unit for circuiting and total electrical load.

• All field wiring must be copper with a minimum insulation of 60°C within the approved conduit. If any of the wires supplied with the unit must be replaced, it must be replaced with copper wiring with a minimum insulation of 90°C.

• Electric, steam, and hot water heated air curtains are factory-equipped with an air curtain mounted solid state temperature sensor cable located in the j-box. Depending on where the temperature is to be measured, the sensor may be left on the end plate or positioned elsewhere. Do not put any clamps on the rubber-coated tip.

• Remove the junction box cover.

• Connect all supply and control circuit wires according to the wiring diagram provided.
  NOTE: For Electric heated air curtains provided with the optional remote thermostat, mount and wire the thermostat according to thermostat instructions and wiring diagram.

• Serial Network Connection, if two or more air curtains are to be linked together for Serial Network operation, continue, otherwise, skip to Step G.
  NOTE: The air curtain must have been ordered from the factory with this option.
  NOTE: One Intelliswitch™ serial cable assembly (part # 505SCINT485-A) is required for every air curtain that is to be used as a Serial Network Connection. “” denotes the length of cable in feet “008”= 8 ft. long.
  For Serial Network operation, a serial cable connection must be made between the Intelliswitch™ control boards of each air curtain to be linked.

  1. Disconnect power to all the air curtains

  2. Find the (RS485) phone jack couplers protruding through the hole in the endplate next to the j-box.

  3. The serial cable ordered for each air curtain will be coiled up and attached to the left end plate.
     NOTE: There will be one less serial cable than the number of air curtains ordered. E.g. Two air curtains together will need only one cable; three air curtains together will need two cables, etc. Any extra cables can be kept as spares.

  4. Plug the (RS485) male phone jack on the end of the serial cable into the empty coupler on the next air curtain.

  5. Continue process for all air curtains that are to be connected serially.

  6. Serial cable connections are capable of two-way communication. It does not matter to which coupler the cables are connected.
     The first and last air curtain in the group will each have an empty coupler after all connections are made. If there are only two air curtains connected, each will have an empty cable coupler.
     NOTE: If a longer cable is required than was supplied, it can be ordered from the factory or made by using a standard 4-wire flat telephone cable, phone jack connectors, and the proper crimping tool.

• Remote Mounted Display Faceplate – If operation of the Intelliswitch® is to be through a Factory Ordered Remote Mounted Display Faceplate, continue, otherwise, skip to step H.
  NOTE: Maximum mounting distance between the Display Faceplate and the air curtain is 20’.

  1. When the remote faceplate option is ordered from the factory, the air curtain comes equipped with the blank faceplate already installed and the 20’ ribbon cable attached. The Display Faceplate is shipped loose, and ready for field installation.
  2. Locate the male end of the conductor ribbon cable and run it to the remote display location. The cable is minimum CL2 rated and should not need to be in conduit.
  3. Connect the female end of the ribbon cable to the 14-pin socket on the back of the display board with the cable approaching from the top and the red ribbon indicator to the right (when facing the front of the display board).
  4. Mount the Display Faceplate to the wall.

• For Electric, Steam, and Hot Water air curtains proceed to Section V – Field Connections otherwise proceed to Section VI – Airflow Adjustments

FIELD CONNECTIONS

• ELECTRICALLY HEATED MODELS
  The heater circuit may be controlled by a remote thermostat or manually through the Intelliswitch® located on the discharge side of the air curtain. Overheating protection is provided by auto-reset thermal cutouts built into the heater coil assembly (see the wiring diagram).

• STEAM AND HOT WATER HEATED MODELS
  Piping should be done by local codes, regulations, and standard practices. Connect the building system supply and return to the ¾” MPT nipples on the heating coil.

OPERATING INSTRUCTIONS

This air curtain comes with a built-in Berner Intelliswitch™ Digital Controller to operate the fan activation, fan speed selection, and heat activation. The air curtain must be properly installed before it is used.

1. For detailed instructions on how to operate the Intelliswitch™ and select from a list of standard modes of control, proceed to the following pages:
   • Frequently Asked Questions (FAQs), page 10 NOTE: For a Detailed Programming Guide, go to www.Berner.com/Intelliswitch
2. Unheated units will have the fans activated by a door switch or sensor. The unit speed can be selected from the Intelliswitch™ display.
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 speed can be selected from the Intelliswitch display.
4. To operate using the Berner AIR™ App and/or BACnet-IP, download the app and follow the prompts. For operation using BACnet-IP, after pairing the air curtain to the app, go into the settings menu and select the BACnet option. Follow the prompts to configure the BACnet controller.
   NOTE: The air curtain must have been ordered from the factory with the Berner AIR (smart controller & app) to use these options. The Berner AIR™ App allows air curtain(s) to be programmed & operated via smart phone and via the BACnet-IP communication protocol. Requires on-site, secure Wi-Fi connection(provided by others). Berner recommends having the on-site user(s) set up the Berner AIR™ App on his/her smartphone.

B. AIR STREAM ADJUSTMENT

1. With the air curtain operating and the door in its fully open position, check to see that nothing is obstructing the airflow at the discharge nozzle vanes.
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 5. 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 the vanes.

MAINTENANCE AND CLEANING

CAUTION: ELECTRIC SHOCK HAZARD Disconnect power whenever servicing the unit. More than one disconnect may be required to de-energize the unit. Keep your air curtain operating at peak efficiency by cleaning the blower wheels, motor(s) and intake grille. The 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. Otherwise, the unit(s) should be scheduled for cleaning a minimum of once every (6) months.

To access the interior of the unit:

• Disconnect and lockout power to the unit. If necessary remove the blower assembly. See Section VIII: Service for instructions on how to remove the blower module.
• Remove the bottom access cover by removing (2) Phillips head machine screws located at the cover’s corners.
• Vacuum and scrape (if necessary) to remove the buildup of dirt and debris from the interior of the air curtain. The motor(s) are permanently lubricated and require no additional lubrication.
• Pull the filter out from underneath the struts of the bottom access cover. It is easiest to work from the middle, pulling one side out and then the other. Spray the filter with warm, soapy water, rinse, and pad dry.
• Replace Filter.
• Reinstall the bottom access cover.
• 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.

SERVICE

CAUTION: ELECTRIC SHOCK HAZARD Disconnect power whenever servicing the unit. More than one disconnect may be required to de-energize the unit. Any service performed on the Architectural Recessed 12/16 air curtain MUST be done by qualified personnel. Berner air curtains 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 the 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.

• To remove the blower module and clean or replace the fans and motor:

1. Disconnect and lockout power to the unit.
2. Remove the bottom access cover by removing (4) Phil-lips head machine screws located at the cover’s corners.
3. If desired, the nozzle surround may be removed to provide more working room. To remove the nozzle sur-round, remove the (4) Phillips head machine screws from the corners. The Intelliswitch® ribbon cable must also be disconnected from the back of the display circuit board before the nozzle surround can be set aside.
4. Disconnect motor power wires/harness from the motor.
5. If the unit has electric heat, the heaters need to be disconnected from the supply wiring. Each fan housing will have a heating element on both of its sides, spanning the inlet venturi. Each heating element will have (2) ¼” quick disconnects for power supply wiring. In addition, the heating elements located on the inside of the module will have (2) ¼” quick disconnects for the auto reset thermal cutouts. Label and separate all of those connections.
6. Using a 5/16” hex driver, loosen and remove the (4) self-drilling screws that hold the blower plate to the frame of the unit. Remove the two screws at the top of the product last, as after they are removed, the module will be free to drop out of the cabinet. See Figure 8 for the location of all screws.
7. Wearing protective gloves, hold the module by the motor, rotate the module top forward, and drop it down through the bottom of the unit.
8. To remove the fans and/or motor, loosen the set screws in the fan wheel hubs by using a 5/32” Allen wrench that is at least 6” long. The set screw can be accessed up through the fan’s discharge.
9. Next, remove the two blower housings by removing the (8) screws that attach the fan housings to the blower plate. When the fan housings are free, slide them and their fan wheels off to each side.
10. Remove the motor clips from the motor mounts, disconnect the motor ground wire if necessary, and lift the motor up and out of its cradle.
11. Reinstall in reverse order of removal.

• To replace the electric heater sub-assembly:

1. Disconnect and lockout power to the unit.
2. Remove the bottom access cover.
3. The blower module does NOT need to be removed from the unit to replace an electric heater.
4. Label and detach the connections for supply power and for the auto-reset thermal cutouts located on both inner heaters.
5. To remove the outer heaters, remove the (3) self-drilling screws from the mounting plate that is attached to the fan.
6. To remove the inner heaters, remove the (2) self-tapping screws from the mounting plate. See Figure 10.
7. Install new heaters. When installing the new outer heaters, be careful not to strip the holes in the thin gauge steel used on the fan housing.
8. Reconnect supply power and thermal cutout wiring.

See the following pages for information on the Intelliswitch™, including:
Quick Start Operation Guide, FAQ and Serial Network Connection

QUICK START INSTRUCTIONS

For your Berner Air Curtain with Intelliswitch™
www.Berner.com/intelliswitchNOTE – to navigate use up/down to select setting and left/right to change settin g

Mode/Fan Speed:

• Mo Sde: elect your mode of operation
• Fan Speed: Sets the speed of the fan
• Delay Time : Amount of time the air curtain is to run after the door closes
• Temp Set: Amount of heat and time the air curtain is to run after the door closes
• Start Time: Programmable time of day air curtain becomes active
• Stop Time: Programmable time of day air curtain stops running
• T-Stat Mode: Set only heat or heat & fan
• Set Time/Day: Programmable clock
• Locked: Unit will run as programmed but settings cannot be changed

IMPORTANT NOTE!
If your air curtain unit is in “Locked” mode when you receive it:
Press and hold the left and right arrows simultaneously for 5 seconds to unlock.

www.berner.com
Berner International
800.245.4455
111 Progress Ave. / New Castle / PA / 16101 / USA

STEP ONE

• To Start: Press the Down Arrow button once.
  NOTE: To change from “Mode” to “Fan Speed” press the down arrow twice.

STEP TWO

• Use the Left and Right Arrows to scroll through the 8 available modes of operations

5 Standard Mode of Operation Options:

• OFF
  • The door opens: The air curtain is off
  • Door shuts: The air curtain is off
• ON
  • The door opens: The air curtain activates
  • Door shuts : The air curtain continues to run
• AUTO
  • The door opens: The air curtain activates
  • Door shuts: The air curtain turns off
• del
  • The door opens: The air curtain activates
  • Door shuts: The air curtain continues to run for a minimum of 60 seconds
• PLUS
  • The door opens: The air curtain and heater activate and run at set speed
  • Door shuts: The air curtain continues to run for a minimum of 60 seconds. If the thermostat is not satisfied, the air curtain and heater continue to run until the thermostat is satisfied. If the thermostat drops below the set temperature, the heater and air curtain will run until the thermostat is satisfied.

3 Customizable Mode of Operation Options:
See www.berner.com/intelliswitch for programming directions (Section 5, Program Menu).

STEP THREE

• Once the Mode of Operation is selected, press the“OK” button

WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY TO PERSONS, OBSERVE THE FOLLOWING: Before servicing or cleaning unit, switch power off 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. Even though every Architectural Recessed 12/16 Air Curtain is individually tested at the factory
before shipment, on occasion improper functionality may be experienced. Here is a list of common questions:

FAQ

Q. Why can’t I change my settings?

A. The Intelliswitch™ may be locked. If the Lock light is illuminated, the control is locked. To unlock, press and hold the left & right arrows simultaneously for 5 seconds. The Lock mode can also be protected with a PASScode. If the PASScode option is on, an attempt to unlock the control will display PASS and then a 0000 prompt. A four-digit code (available in the installation instruction book Appendix) must then be entered to unlock the control. Use the up and down arrows to select a number and the left and right arrows to select the digit to edit. Press OK when done. Note: If the AutoLock setting is on, the control will re-lock if there is no activity after 5 minutes.

Q. Why didn’t the Intelliswitch™ save the changes I made to a program?

A. If a program is active (a dot is illuminated by one of the clock digits), changes can be made to any settings on the User Menu. These changes however will only remain in effect until the program changes to the next time zone. To make changes permanent, settings must be changed in the program from the Program Menu. Access the Program Menu by holding down the left arrow for 5 seconds until “PRO” is displayed. Arrow down to select programming and arrow left to select the program to edit. Use the down arrow to step through the options and make changes as desired. Continue to press the down arrow until Stor is displayed. Press OK or down to keep or store the changes.

Q. How do I undo a change that I made to a program in the Program Menu?

A. Changes to programs cannot be undone. The programs can however be reset to the factory default settings. This must be done on the Factory Menu. Access to the Factory Menu is obtained through the Diagnostics Menu. Press and hold the right arrow for 5 seconds until “DIAG” is displayed. From the “DIAG” display press and hold the up and down simultaneously for 10 seconds until “FACT” is displayed. Use the down arrow to select “DEFn” on the display then use the right arrow to select “DEFP”. Press “OK” to reset. The control display will go blank then blink as confirmation.

Q. My air curtain won’t turn on?

A. Check the AM/PM setting on the Start and Stop times or the clock (considering the AM indicator light when setting values). Note: set the start time and stop time to the exact time for the unit to be active full-time. Check to see if a program is active that may have different start/stop times than those expected.

Q. My building has a Building Management System, can the Intelliswitch work with a BMS?

A. The Intelliswitch can be controlled by a Building Management System (BMS) but currently cannot communicate with them. Dry contacts on the BMS may be used to control the unit activation through the door switch connections (blue wires 9 & 10) and the heat activation through the remote thermostat connections (orange wires 6 & 7). Consult factory.

Q. Why won’t my heat work, even though fans are running?

A. The thermostat(s) or speed sensor may need to be adjusted or replaced.

1. Make sure that the thermostat probe and/or remote thermostat are in the “On” position and set above ambient (room) temperature.
2. Check internal and external thermostat status in the Diagnostics Menu for a faulty thermostat. To do this, hold the right arrow for five seconds until DIAG appears, then arrow down to the ts setting, if it displays “1” then the thermostat(s) is working (there is a call for heat).
3. If no external thermostat is used, check to see if the internal probe is attached to the control board. Disconnect power to the unit, remove the display board, and check that the beige sheathed cable is attached at both ends. If the thermostat(s) and settings are correct and you are still not getting heat, then check to see the fan speed. to do this, press the down arrow to reach the Mode/Fan speed setting. Use the right and left arrows to change the fan speed.
4. Check to see if you can adjust the fan speed. If the speed sensor is bad there will be no speed control and the Intel-liswitch will not let the heat come on. If it is too difficult to determine a change in speed, the speed sensor can be checked by entering the DIAG menu and checking the first error code. If ER 10 displays, the speed sensor is recognized by the Intelliswitch. If the code ER 11 is displayed, the Intelliswitch does not recognize the sensor, and it may be faulty or need to be adjusted closer to the trigger bar. Turn off the power to the unit and remove the screen to check the distance between the sensor and the trigger located on the left side of the motor (use the bottom access cover for steam/hot water heated units). The sensor should be less than 1/16” from the trigger face. Check the distance at both ends of the trigger. Adjust if necessary.
5. If there is still no heat or speed control, you may need a new speed sensor: consult the factory.

Q. Why won’t the Intelliswitch™ light up?

A. There may not be power to the control.

1. Check to see if the main power is turned on to the unit. Your air curtain may have multiple disconnects, be sure all are turned on.
2. Verify that there is power to the board. NOTE: ONLY QUALIFIED PERSONS SHALL CHECK POWER IN THE UNIT WITH THE POWER ON. The power terminals are located directly behind the display. Remove two Phillips screws from the Intelliswitch display to expose the power terminals and check the line voltage at spade terminals L2 and 120, 208 or 240 (depending on the voltage supplied to the unit).
3. Check the ribbon cable connections to the display board for a loose connector or improperly connected cable (see Installation Instructions for correct cable connection).
4. If the display still doesn’t light, unplug the speed sensor and thermostat probe (if a heated unit) from the control board. If the display lights, plug one component back in at a time to see which one may be shorted. The faulty component will make the display go blank again.
5. If there is line voltage power at the board terminals, the ribbon cable is correctly connected, the speed sensor and the thermostat are working, and it is still not working, you may need a new circuit board: consult the factory.

Q. Why won’t my fans shut off?

A. The Intelliswitch™ may be in the wrong mode or miswired.

1. Check to see if the control is in the “ON” mode, if it is, then change the Mode to another setting.
2. The T-Stat Mode may be set to the “both” setting and if the thermostat is calling for both Fan and Heat, change the T-Stat Mode to “HEAT”.
3. If there is a door switch and the unit is in a mode that is activated by it, there could be a short, miswiring or mixup in components. Close the door and check the door switch status in the Diagnostics menu. Hold the right arrow for five seconds until DIAG appears, then arrow down to the DS setting, if it displays “1” then the door switch signal is closed (there is a call for a fan). If the door is closed, the signal should be “0” or open.
4. There could be a short in-the-field connection to the door switch or the door switch leads could be miswired. To test, disconnect the door switch connection at the unit. Opening the wiring tray on top of the unit and be cautious of high voltage connections. Disconnect the blue wires labeled 9 & 10 from the field wiring to the door switch or make sure they are not tied together. There is no danger of getting shocked because the signal is 5 volt dc. Be sure not to touch the blue wires to any-thing metal (or grounded). The unit should shut off when it is in any mode that is activated by the door switch.
5. If the air curtain is heated, make sure that the thermostat isn’t wired to the door switch leads. Door switch leads are blue and labeled 9 & 10.

Q. How can I check the door switch to be sure it’s working?

A. The Intelliswitch™ may be in the wrong mode, be miswired, or have a faulty door switch.

1. Test the wiring and controller function at the same time first. Locate the door switch and open its wiring compartment by removing the two screws holding on the back cover. There should be two wires connected to screws inside the switch. There is no danger of getting shocked because the signal is 5-volt DC. Be sure not to touch the wires to anything metal (or grounded). Either disconnect both wires from the screws (noting which screws the wires are under) and touch them together (with air curtain in “Auto” mode) or make a short jumper wire and touch the jumper to both screws at the same time to see if air curtain comes on. If it does, the controller and wiring work.
2. If the wiring and unit pass the function test, the problem could be either misalignment or a faulty door switch. On a magnetic reed switch check for magnet alignment, for a plunger/roller type switch, check contact engagement with door.
3. If you have access to an electrical test meter, the door switch contacts can be tested for continuity when the door switch wires are disconnected from the unit.

Q. Why won’t my heat shut off?

A. The Intelliswitch may need to be adjusted, have been miswired or have a faulty thermostat.

1. Heat is activated by one of two thermostat connections.
   To test the internal thermostat set the external thermostat to OFF. The settings of the unit-mounted thermostat probe are accessed through the display. Press the down arrow until the Temp Set indicator lights up; check if the temperature setting and unit of measure are correct. Test to see if it shuts off by setting the thermostat temperature to OFF or lower than the room temperature.

2. If an external thermostat is connected to the unit, there could be a short in-the-field connection or the thermostat leads may be miswired. To test the external thermostat set the internal thermostat to OFF. Disconnect the external thermostat connections at the unit. Open the wiring tray on top of the unit and be cautious of high-voltage connections. Disconnect the orange wires labeled 6 & 7 from the field wiring to the thermostat or make sure they are not tied together. There is no danger of getting shocked because the signal is 5-volt dc. Be sure not to touch the orange wires to anything metal (or grounded). The heat should shut off when the wires are separated. For more complex troubleshooting of either thermal cutouts or heater contactors, please consult a qualified electrician or the factory.

TROUBLESHOOTING

NO AIR| •       Power supply line open (no power)

•       Fuse blown/circuit breaker tripped

•       Motor overload tripped

•       Failed switch

| •       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 motor.

---|---|---
| MOTOR RUNNING/FANS ARE NOT ROTATING

•       Broken fan hub •     Replace switch

•       Shaft rotating inside fan                                           • Replace fan

ELECTRICAL CONTROLS NOT FUNCTIONING WHEN DOOR IS OPEN

•       Door limit switch not operating| •       Tighten set screws/tighten fan on shaft

•       Repair or replace limit switch

MINIMUM AIR| •       Air directional discharge vanes mis-adjust- ed

•       Inadequate intake clearance

•       Blower motor operates below speed

•       Fan rubbing against housing

•       Fan wheels clogged with dirt

|

•       Adjust vanes to proper position, see in- structions

•       Move air curtain or remove obstruction

•       Provide adequate space for air curtain

•       Improper voltage

•       Free fan from housing

NO SPEED ADJUSTMENT| •       Speed sensor not detect- ing trigger rotation| •       Adjust gap between sensor & trigger/replace sensor
AIR IS NOT HITTING FLOOR| •       Air stream too weak

•       Air steam hits obstruction

•       Negative pressure

| •       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)

UNEVEN AIR| •       Shaft rotating inside fan

•       One motor not operating

| •       Relieve negative pressure by providing

makeup air

ELECTRICALLY HEATED MODELS•

NO HEAT| •       Thermostat not set properly

•       Coils burned out due to lack of air

•       Automatic reset thermal cutout failed in open position

•       Speed sensor not detecting trigger rotation

•       Without speed adjustment, failed speed sensor

|

•       Change thermostat setting

•       Correct airflow problem; replace coils

•       Replace automatic thermal cutout

•       Adjust gap between sensor and trigger

•       Replace speed sensor

---|---|---
MINIMAL HEAT|

•       Thermostat in wrong location – thermostat too close to discharge

•       Improper voltage

|

•       Move thermostat away from air stream

•       Supply proper voltage

EXCESSIVE HEAT| •       Thermostat not set properly

•       Speed sensor not detecting trigger rotation

•       Thermostat in wrong location

•       Thermostat not set properly

| •       Change temperature setting

•       Adjust gap between sensor & trigger/replace sensor

•       Move the thermostat closer to air stream

•       Change temperature setting

STEAM/HOT WATER HEATED UNITS

EXCESSIVE HEAT

| •       Insufficient air over coil

•       Improper voltage

•       Too high steam/hot water pressure

|

•       Reduce steam pressure/hot water flow

---|---|---
MINIMAL HEAT|

•       Inadequate air flow, fins plugged up, dirty coils

|

•       Clean intake and coils

•       Increase trap size

XI. APPENDIX

A. Serial Network Connection
NOTE: ONLY AIR CURTAINS FROM THE SAME SERIES CAN BE NETWORKED TOGETHER. IF UNITS FROM DIFFERENT SERIES ARE NETWORKED OR INCOMPATIBLE, AN ER61 WILL DISPLAY EVERY TIME A COMMAND IS ENTERED.

Serial Network Connection Operation
For Serial Network Connection a serial cable connection must be made between all Intelliswitch™ controls of each air curtain to be linked. Once air curtains are linked all Menu settings made through any air curtain display or remote control will transfer to all other linked air curtains. Parameter changes made on any linked air curtain will update all other boards “live” upon menu selections.

1. All air curtains equipped with an Intelliswitch and the Serial Communication Option have two RJ11 connectors (telephone plug) located in the wiring compartment. Serial cable(s) with the corresponding RJ11 socket (telephone jack) on each end are shipped separately.

2. Once the air curtains are installed, connect all units that are to be networked together using the serial cable(s) and either of the two RJ11 connectors in each wiring compartment. For example, two units networked together require one cable and leave
   an unused connector in each wiring compartment. Three units networked together require two serial cables, leaving two units with one connector unused in each wiring compartment and one unit with both connectors used.

3. A wiring diagram is included in the wiring compartment of each air curtain and illustrates the provision where the serial cable is connected to network additional air curtains.

4. Once all serial cables are connected and all air curtains have power the units can be programmed from any handheld remote or air curtain display on the network. All program settings are included in the installation instructions shipped with the air curtain.

5. If the air curtains were purchased with the WiFi option when connected to the local WiFi network they can be programmed from a smartphone using the Berner app.

Serial Network Connection – Settings
When units with the Intelliswitch™ are operated in a network there are three options available under the Programming Menu that manage how they interact with each other.

• Door Switch (door)
• Thermostat (temp)
• Stand By (Stby)

Each option can be set to “ind” or “ALL”.
“ind” = the option only is activated on this unit or independent of the other units
“ALL” = the option activates ALL of the units connected to the network

1. To access the Serial Network Connection hold the left arrow for 5 seconds and “Pro” will display
2. Use the left/right arrows to locate the desired option (door/temp/Stby)
3. When located, use the down arrow to enter into that setting.
4. Use the left/right arrow to change the setting between “mind” and “ALL”

EXAMPLE: Stand-By function
If set to independent, when STOP is pressed only the unit where STOP is pressed will stop. If set to ALL, all of the connected units set to ALL will stop.

EXAMPLE: Door Switch function

• If set to independent, the door switch connected to a unit will only activate that unit. If set to ALL, all of the connected units set to ALL will activate.
• Remote Mounted Display Faceplate-for the operation of the Intelliswitch™ through a remote-mounted display faceplate.

NOTE: Maximum mounting distance between the Display Faceplate and the unit is 20’. The unit MUST be factory-ordered with the remote-mounted faceplate option. When the remote faceplate option is ordered from the factory the air curtain comes equipped with the blank faceplate and 20’ ribbon attached. The Display Faceplate is shipped loose ready for field installation.

1. 1. Locate the male end of the 14-conductor ribbon cable in the wiring tray and run to the remote display location. The cable is minimum CL2 rated and should not need to be in conduit.
   2. Connect the ribbon cable to the 14-pin socket with red stripe positioned on the top left when facing the front of the display board.
   3. Mount the remote faceplate to the wall.
   4. Reinstall the wiring tray cover.

Infra-red Remote Control
The handheld infra-red remote control buttons, layout, and operation are the same as that on the Intelliswitch™ air curtain display (including multiple button presses) with one exception, the Lock Button. There is no need for multi-button press and hold for lock/un-lock activation. The Lock Button will lock/unlock the display in one press. The Infra-red Remote Control has a range of 15 feet.

D. BACnet-IP Integration
If the unit was ordered with the Berner AIR (smart controller & app), then it is BACnet compatible.

1. To connect wirelessly to the Building Management System using BACnet-IP: download the Berner AIR App, pair the air curtain to the app, and then in the settings menu select the BACnet option. Follow the prompts to configure the BACnet controller.
2. To connect via wire: this air curtain includes an ethernet connection in the wiring compartment to connect to the Building Management System via BACnet-IP. Connect a CAT 5 ethernet cable (provided by others). Once wired, download the Berner AIR App, pair the air curtain to the app, and then in the settings menu select the BACnet option. Follow the prompts to configure the BACnet controller.

WARRANTY

Berner International (“The Company”) warrants all new equipment to be free of defects in workmanship and material for five 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 by the limits specified on the nameplate and The Company’s instructions. All warranted parts will be replaced at no charge for a period of six months from date the parts were shipped. 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 the defective part(s). The Company reserves the right to inspect, or have inspected by a qualified 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 benefit 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 THAT EXTEND BEYOND THE DESCRIPTION ON THE FACE HERE INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

LIMITATION OF DAMAGES

Notwithstanding anything to the contrary above, the 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 shall The Company be liable for any special, consequential, incidental or indirect losses or damages from the sale of The Company’s equipment under this agreement.

BERNER INTERNATIONAL
New Castle, Pennsylvania
724-658-3551
1-800-245-4455
www.Berner.com
Berner reserves the right to alter specifications without prior notice.

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