4725 LawndaleLa Marque, TX 77568
PHN: (409) 935-5743
FAX: (409) 938-4189
Copyright © 2003- Bebco Industries, Incorporated - All Rights Reserved
Environmental Control Units DivisionBebco Industries
1.5, 2, 2.5, 3, 3.5, 4 & 5 TonEconomy Grade Wall
Mounted Air Conditioners
Unit ApplicationBebco Model EX-WAC EconomyGrade Air
Conditioners are designed as an economical buthighly qualified solution to building climate controlin Division 2 / Zone 2 Areas. Beginning with thecomplete line of Bard Hi-Boy® Wall Mount Series®Brand Air Conditioners, Bebco converts the unitsby a process that assures National Electrical CodeArticle 500 compliance, while retaining the low costof a commercially produced unit. The resultingproduct line offers an Underwriter's LaboratoriesListing, at minimum cost, in a professionally modifiedunit.
Technical DescriptionBebco Model EX Air Conditioners are self
contained wall mounted units with all necessarycomponents to supply a room or building withrecirculated air that is filtered, temperaturecontrolled and humidity limited. The units consistof two isolated sections, stacked one atop theother. The lower section, known as the condensercompartment contains the condenser coil, thecondenser coil motor, fan and shroud assembly,the compressor, and related sensors which supplythe unit controls with signals to activate anddeactivate the compressor and condenser fan.The upper section, known as the evaporatorcompartment, contains the evaporator coil, auxiliaryheater elements (if supplied), and the evaporatorblower assembly, which consists of two blowerwheel fans and a duel shaft motor. In addition, theevaporator compartment contains the unit'selectrical controls and a return air filter element.The units are contained within a 20 gauge sheetmetal housing that features wall surface mountingflanges, ventilation grills on the sides and face ofthe condenser compartment, a drip shield flange,and two panel covers that allow full access to theevaporator compartment. The units are intendedfor use in outdoor locations and feature a weatherresistant paint finish, which can also be refinishedwith white enamel or custom paint. Model EX-WACunits are intended for installation in areas whereexposure to a severely corrosive atmosphere isconsidered unlikely or very infrequent. On the rearside of the units, a supply duct outlet (top) andreturn duct inlet (bottom) extend from the rear wallof the evaporator compartment. Upon installation,the ducts penetrate exterior building or room wallcutouts to recirculate air within the structure. Theunits are furnished with a drip shield and bottommounting flange, bolted to the back side of theunits, and a return grill and supply grill are shippedloose to dress the wall cutouts. In addition, custom-built sectional supply ducting and registers can befurnished to distribute the conditioned air evenly tomultiple rooms or across the length of a large roomor building.
MODEL EX-WACAIR CONDITIONERS
FOR DIVISION 2 / ZONE 2 HAZARDOUS AREAS
ECU Division Technical Bulletin EX-WAC-R1.1 10/03
Model EX-WAC-15-A-22-0
AirFlow
The Conversion ProcessStarting with documented instructions and a fully
inspected and operationally tested unit, Bebco beginsthe conversion process in the lower condensercompartment, where a special wiring housing is fitted tothe compressor, and sealed flex conduit and form sevenconduit fittings are added to ensure that all high voltagewiring is suitable for a Division 2 / Zone 2, Group C & D/ IIA, IIB Area. Next, the original condenser coil motorand fan blade are replaced with a Division 2 / Zone 2 ULListed TENV motor with hermetically sealed thermaloverloads and an aluminum spark-free fan blade. Theunit's evaporator compartment is then made suitable fora building or room with either a Nonhazardous or Division2 / Zone 2 rated interior. On units with a "G2" electricalrating, for buildings with Nonhazardous interiors, theelectrical control compartment is carefully sealed, aspecial cover is added to the exterior surface of the unitand the original evaporator blower is left intact, alongwith the original motor wiring harness. On "22" ratedunits, for buldings or rooms with Division 2 / Zone 2 ratedinteriors, the original electrical controls and thier enclosureare removed, and a NEMA 7 explosion proof enclosurecontaining all electrical controls is mounted externally tothe unit. Then the evaporator blower wheels and motorare replaced with spark free aluminum blower wheelsand a Division 2 / Zone 2 UL Listed TENV Motor withhermetically sealed thermal overloads, along with sealedflex conduit and appropriate condit seals. On both units,inrinsically safe barriers for all condensor compartmentsensors are added to the controls. On the "22" rated unit,an intrinsically safe repeater relay is added for the safeoperation of a Division 2 / Zone 2 thermostats. Finally,"G2" units are silicone sealed at every point of upperbody panel attachment (for the evaporator compartment)and gasket strips are applied to the rear covers to providea positive seal against the entrance of flammable gasesor vapors. All units are then fully inspected andoperationally tested to ensure quality of the final product.
IMPORTANT CONVERSION PROCESS NOTEVarying compressor styles furnished by Bard require
Bebco to add a special conduit assembly to accommodatereciprocating compressor crankcase heaters and to addnon-incendive isolation barriers for any high pressure orhigh temperature sensors in the condenser compartment.Sensors are usually present on units featuring scrollcompressors and on units exceeding 1.5 tons.
"22" & "G2" Unit RatingsThe most distinguishing difference between various
models within the Model EX-WAC Product Line, besidesthe obvious difference of size, is the classification of theevaporator compartment. As noted above, since theunits are intended for use in a Division 2 / Zone 2, GroupC & D / IIA, IIB Hazardous Area, the condensercompartment components and all associated wiring arerated for Division 2 / Zone 2 Areas. But the evaporatorcompartment components are only exposed to the airwhich is recirculated within the room or building that isbeing air conditioned. For this reason, Bebco designsunits that are suitable either for a Nonhazardous interioror a Division 2 / Zone 2 interior, as noted above. The unitsare distinguished by a segment of the Model Number thatidentifies the unit's electrical rating. A rating of "22"represents a unit that is suitable for a Division 2 / Zone 2Area both inside and outside of the building or room. Arating of "G2" represents a unit that is suitable for aDivision 2 / Zone 2 Area on the exterior of the building orroom, but which is only suitable for a Nonhazardous Areawithin the room or building. The downgraded "G2" unitis therefore, by design, only suitable for building interiorsthat are rated Nonhazardous, but is accordingly offeredat a significantly lower price than the "22" units.See IMPORTANT NOTES for critical information >>
IMPORTANT "G2" UNIT NOTES
"G2" Units are designed and approved foruse on control rooms or buildings classifiedas Nonhazardous as a result of Type Zpressurization in accordance with NFPA496. In addition, the control rooms orbuildings must contain no internal source ofignitable concentrations of gases or vapors,e.g. analyzer rooms.
"G2" Unit rear access covers do not have tobe considered as an opening capable ofbeing opened in the calculation for minimumoutward velocity in accordance with NFPA496 section 5-4.1(b), exception #2.
"G2" Units must be connected to a power(service) disconnect switch behind aseparate disconnect switch for thepressurization unit, in accordance with NFPA496 section 5-4.9.
"22" Units are designed and approved foruse on control rooms or buildings classifiedas Class I, Division 2 / Zone 2, Groups C&D/ IIA, IIB and contain no internal source ofignitable concentrations of gases or vapors(analyzer rooms).
"22" Units are also designed and approvedfor use on analyzer rooms or buildingsclassified as Class I, Division 2 / Zone 2,Groups C&D / IIA, IIB, if the room or buildingis ventilated in accordance with NFPA 496section 7-2.6.
IMPORTANT "22" UNIT NOTES
Division 2 / Zone 2Interior
Sealed EvaporatorCompartment
w/ General PurposeEquipment
Nonhazardous Type ZPressurized Interior
Climate ControlledBuilding
Climate ControlledBuilding
Condenser Compartmentw/ Division 2 / Zone 2
Equipment
Cross Sectional Views of Installed Units, showingUnit Compartment & Building Interior Ratings
"22" Unit "G2" Unit
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 2 of 8
EvaporatorCompartmentw/ Division 2 /
Zone 2Equipment
Condenser Compartmentw/ Division 2 / Zone 2
Equipment
➤ ➤
➤ ➤
AirFlow
➤
➤
➤
➤
➤ ➤ ➤
➤ ➤➤
➤
➤
➤
➤
* High Pressure &Temperature Sensor
Repeater Relay
"22" Unit Interior View "G2" Unit Interior View
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 3 of 8
Typical "22" Unit Controls Typical "G2" Unit Controls
VAC PowerTerminals
Evaporator FanMotor Cap.
24 VACTransformer
Evaporator FanMotor Control Card
CompressorCap. & Contactor
ThermostatRepeater Relay
* Auxiliary HeaterElement Contactors
CompressorContactor
ThermostatTerminals
VAC PowerTerminals
IMPORTANT NOTEItems marked with an asterisk (*) above, may not be included on all units, dependent on compressor style furnished
* High Pressure &Temperature Sensor
Repeater Relay
24 VACTransformer
Evaporator FanMotor Control Card
SlopedTop
EvaporatorCoil
DrainPan
Division 2 / Zone 2Evaporator Blower
General PurposeEvaporator Blower
Sealed Flex Conduit
Explosion ProofNEMA 7
Control Enclosure
NEMA 12Control Enclosure
CondenserCoil
- Box Shown at -Right Angle
Top >
Compressor Conversions Condenser Fan Conversion
Wiring Feed-Through Hub
Sealed Flex Conduit
Ground Bonding Wire
TENV Motor withHermetically Sealed
Thermal Overloads andAluminum Fan Blade
Compressor WiringJunction Box
Sealed InterconnectionWiring Junction Boxes
Crankcase HeaterAccess Fitting
Auxiliary Heater Wiring Auxiliary Heater Elements
Standard Connection Platefor Nonhazardous Areas
Standard 5-20 Kilowatt Heater Elementsfor Nonhazardous Areas
For "G2" Units Only
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 4 of 8
IMPORTANT NOTICE
Unit Compressors will vary due toProduction Practices of
Bard Manufacturing.
Some Units will feature ReciprocatingCompressors (shown above left),however some units will feature
Scroll Compressors (shown lower left),along with High Pressure and High
Temperature Sensors, as required forproper operation of the Units.
Reciprocating Compressor
High Temperature Sensor
Compressor WiringJunction Box
Sealed Flex Conduit
Ground Bonding Wire
Non-Incendive Wiring toHigh Temperature Sensor
Scroll Compressor
Basic Unit Wiring Requirements & Compatible Accessories
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 5 of 8
Remote Heater UnitsFor EX-WAC "22" Units
Bebco Model PT-AC-HMU.L. Listed Non-Incendive
Programmable ThermostatsFor Class I, Division 2 / Zone 2
Areas
Bebco Model EX-WAC "22" Units BebcoAccessories
Auxiliary Heater ElementsFor EX-WAC "G2" Units
(Prewired & Mounted Internally)
Bebco Model PT-AC-GMProgrammable ThermostatsFor General Purpose Areas
BebcoAccessories
Bebco Model EX-WAC "G2" Units
From CustomerPower Source
Division 2 / Zone2
Rated Conduit
From CustomerPower Source
Division 2 / Zone2
Rated Conduit
From CustomerPower Source
Division 2 / Zone2
Rated Conduit
24 VAC SignalFrom EX-WAC UnitHeater Contactor
Division 2 / Zone 2Rated Conduit
Nonincendive Wiring FromEX-WAC Unit Isolation Barrier
Non-Incendive Cable
General Purpose Wiring FromEX-WAC Unit Terminals
General Purpose Cable
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 6 of 8
Unit Specifications
Overall Dimensions: see page 7Shipping Weights (lbs):
1.5 & 2.0 Ton Units 3502.5 & 3.0 Ton Units 4353.5, 4.0 & 5.0 Ton Units 560
Operating Temp Ranges: -40° F - 104° FPower Wiring Conduit Entries: 3/4" FPTThermostat Wiring Conduit Entries: 1/2" FPTT- Code Rating T3Operating Voltages: 208/230 VAC 1Ø
* 208/230 VAC 3Ø** 460/480 VAC 3Ø
* Voltage not available for 1.5 ton Units** Voltage not available for 1.5 or 2.0 ton Units
Component Specifications
Condenser Fan Motor: TENV D2/Z2, C & D / IIA, IIB"G2" Evaporator Blower Motor: General Purpose"22" Evaporator Blower Motor: TENV D2/Z2, C&D / IIA, IIBCompressor Type: * Scroll or Reciprocating"G2" Control Compartment: Sealed"22" Control Enclosure: NEMA 7
* Furnished compressor type may vary from unit to unit
Material Specifications
Unit Housing: Painted 20 Ga Galv. Steel"G2" Rear Access Door: Painted 14 Ga Galv. Steel"G2" Access Door Fasteners: Cast Zinc Body / Zinc BoltEvaporator Coil: Copper & Alum."G2" Evaporator Blower Motor: Painted Steel Housing"G2" Evaporator Blower Wheels: Galvanized Steel"22" Evaporator Blower Motor: Painted Steel Housing"22" Evaporator Blower Wheels: 3003 grade AluminumCompressor Body: Painted Carbon SteelCondenser Fan Motor: Painted Steel HousingCondenser Fan Blade: 3003 grade AluminumCondenser Coil: Copper & Alum.Unit & Device Nameplates: Silkscreened Lexan®
Model Number Nameplate: Silkscreened SS"G2" Control Enclosure: 22 ga. Galvanized Steel"22" Control Enclosure: Cast AluminumElect. Enclosure & Fittings: Cast Zinc & Aluminum
Lexan® is a registered trademark of the General Electric Corporation
Housing Finish Specifications
Standard Finish: Bard Factory Finish(BARD) 2 mil Tan Enamel on all
exterior surfaces except Unit back
White Urethane Finish: 1 mil Wash Primer &(BEBCO) 3 mil White Urethane on all
exterior surfaces including Unit back
Custom Finish: per written customer specification(USER)
"G2" Unit Installation WARNINGA minimum outward velocity of 0.305 m/sec (60 fpm) isrequired when the Rear Access Door is removed inaccordance with par. 5-4.1b of the NFPA 496 1993 edition.The door must be considered as an opening capable ofbeing opened when sizing the building pressurization unit.
DO NOT install any damper, air filtration unit or similarequipment in the duct connected to this climate controlunit which may restrict the positive pressure air system.
Structural Wall Cut Out Template
All Dimensions shown in inches.
B
A
A
A
A
A
C D CE
D C
F
G
HHI
TONS A B C D E F G H I
1.5 & 2.0 12 4.75 7 20 8 20.5 12 2.56 5
2.5 & 3.0 12 4.75 5.5 28 8 17.75 14 3.25 5
3.54.0 16 2.0 6.25 30 10 29.75 16 3.25 1.8755.0
Unit Mounting Template Dimensions
SUPPLYDUCT
RETURNDUCT
BOTTOMMOUNTING FLANGE
Unit Minimum Circuit Ampacity Chart
UnitTons
208 VAC/1Ø
0 5 8 10 15 20 0 6 9 15 18 0 6 9 15
208 VAC/3Ø 460 VAC/3Ø
1.5
2.0
2.5
3.0
3.5
4.0
5.0
16 30 45 56 - - - - - - - - - - -
17 30 45 56 - - 13 22 - - - - - - -
24 31 47 57 83 - 17 23 32 50 - 10 12 17 26
27 31 47 57 83 - 20 23 32 50 - 10 12 17 26
33 33 - 59 85 110 24 - 34 52 60 12 - 17 26
38 38 - 59 85 110 26 - 34 52 60 13 - 17 26
44 44 - 59 85 110 32 - 34 52 60 16 - 17 26
Aux. Heat KwAux. Heat KwAux. Heat Kw
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 7 of 8
Model EX-WAC "22" Unit
"22" Front View "22" Left View
Model EX-WAC "G2" Unit
"G2" Right View"G2" Front View "G2" Left View
TONS W D H A B C E F G I J K L M N O P Q R
1.5 & 2.0 32.875 16.875 70.5 7.875 19.875 11.875 34.875 18.25 25.75 20.75 31.25 28 34 4.75 12 5 35.25 35.25 44
2.5 & 3.0 37.875 16.875 70.5 7.875 27.875 13.875 39.875 18.25 25.75 18 31.25 28.75 39 4.75 12 5 35.25 35.25 44
3.54.0 42 22.5 84.875 9.875 29.875 15.875 43.875 19 31.625 30 41.25 27 43 2 16 1.875 45.25 41.25 535.0
Unit Dimensions
All Dimensions shown in inches. All Dimensions are nominal and are intended for architectural & installation purposes only.
E
F
W
GQ
"22" Right View
D2"
A
I2"
CH
KJ
LM
N
N
N
N
N
O
B
B
"22" Back View
E
R
G
W D2"
2"I
A
C
K
H
PJ
LM
N
N
N
N
N
O
B
B
"G2" Back View
Model EX-WAC "22" Unit
BoxNot
Shown
Bebco Industries, Incorporated Environmental Control Units Division Model EX-WAC R1.1 Page 8 of 8
For "G2" Units Only
- - - - - UNIT VOLTAGES - - - - -UNIT - A - - B - - C -TONS 1Ø 208 VAC 3Ø 208 VAC 3Ø 460 VAC▼1.5 AC15AG2H05 ➤ Heater Element Model Numbers
AC15AG2H08 ➤ Last Two Digits "08" = KilowattsAC15AG2H10
2 AC20AG2H05 AC20BG2H06AC20AG2H08AC20AG2H10
2.5 AC25AG2H05 AC25BG2H06 AC25CG2H06AC25AG2H08 AC25BG2H09 AC25CG2H09AC25AG2H10 AC25BG2H15 AC25CG2H15AC25AG2H15
3 AC30AG2H05 AC30BG2H06 AC30CG2H06AC30AG2H08 AC30BG2H09 AC30CG2H09AC30AG2H10 AC30BG2H15 AC30CG2H15AC30AG2H15
3.5 AC35AG2H05 AC35BG2H09 AC35CG2H09AC35AG2H10 AC35BG2H15 AC35CG2H15AC35AG2H15 AC35BG2H18AC35AG2H20
4 AC40AG2H05 AC40BG2H09 AC40CG2H09AC40AG2H10 AC40BG2H15 AC40CG2H15AC40AG2H15 AC40BG2H18AC40AG2H20
5 AC50AG2H05 AC50BG2H09 AC50CG2H09AC50AG2H10 AC50BG2H15 AC50CG2H15AC50AG2H15 AC50BG2H18AC50AG2H20
For "22" Units Only
- - - - - UNIT VOLTAGES - - - - -UNIT - A - - B - - C -TONS 1Ø 208 VAC 3Ø 208 VAC 3Ø 460 VAC▼1.5 RHUAH1.8T3 ➤ Kilowatt Rating
RHUAH3.6T3 ➤ T-Code Rating
2 RHUAH1.8T3 RHUBH1.8T3RHUAH3.6T3 RHUBH3.6T3
2.5 - 5 RHUAH1.8T3 RHUBH1.8T3 RHUCH1.8T3RHUAH3.6T3 RHUBH3.6T3 RHUCH3.6T3
For additonal information on Remote Division 2 Heater Units, pleaserefer to the Remote Heater Unit Specification Bulletin.
For information regarding duct mounted heating units and forced airheating units, please consult factory sales agent.
Model Number Intended Unit U.L. ListingPT-AC-HM Model EX-WAC "22" Unit Non-IncendivePT-AC-GM Model EX-WAC "G2" Unit General Purpose
Model Number Designations
Local Sales Representative
IMPORTANT NOTESAll specifications subject to change without notice.
Warranty & Liability policies available upon request.
Bebco Industries, IncorporatedEnvironmental Control Units Division
4725 LawndaleLa Marque, Texas 77568
(800) OK-BEBCO(800) 652-3226
Phn: (409) 935-5743Fax: (409) 938-4189www.okbebco.com
Auxiliary Heater Elements
Remote Heater Units
Programmable Thermostats
Typical Model- EX - WAC - 15 - A - G2 - 0
ModelEX - Economy
Grade
StyleWAC- Wall Mount
Air Conditioner
TonnageBTU Cool*
15 - 1.5 Tons 1830020 - 2.0 Tons 2400025 - 2.5 Tons 3100030 - 3.0 Tons 3600035 - 3.5 Tons 4300040 - 4.0 Tons 4750050 - 5.0 Tons 57500VoltageA - Single Phase 208/230 VACB ** - Three Phase 208/230 VACC *** - Three Phase 460 VAC
Electrical RatingInterior Exterior
G2 - Nonhazardous Division 2 / Zone 222 - Division 2 / Zone 2 Division 2 / Zone 2
Paint Finish0 - Standard Finish1 - White Urethane Finish2 - Custom Finish
* BTU cool rating @ 75° F outside ambient
Note: Units operating at or below 65° F outsideambient require factory installed low ambient controlaccessory for proper operation. Consult Factoryfor more information.
** Voltage not available for 1.5 ton Unit*** Voltage not available for 1.5 or 2.0 ton Units