Comfortable. Indirect and Indirect/Direct Evaporative Units. Aztec. Keeps You. Technical Guide for: ASC TGASC-2

Transcription

1 TGASC Technical Guide for: ASC Low Operating Cost, High Efficiency, Environmentally Friendly Evaporative Cooling Units Indirect and Indirect/Direct Evaporative Units Aztec Keeps You Comfortable

2 TABLE OF CONTENTS Standard Features and Optional Equipment... Model Designation... Leaving Air Performance Tables... Typical Design Conditions for US Cities... Equipment Data Chart... 6 Heating Capacity Chart... 7 Blower Performance Charts... Amp Draw Table... Fan Efficiency... Dimensional Data... 6 Roof Curb... Plumbing... Controls... 0 Typical Specifications... A ztec has been manufacturing quality heating and cooling, Indirect and Indirect/Direct Evaporative products since 969. We have provided HVAC equipment to numerous school districts, prisons, military bases, defense contractors, large industrial facilities, and small business complexes. Our design and engineering staff has extensive experience in Indirect and Indirect/Direct air handler design, heat recovery, heating, ventilation, and refrigeration equipment. We are committed to supplying top quality catalog and custom equipment at a reasonable cost. Our nationwide sales organization is available to help you select the right equipment to solve your problem. WHY USE THIS TYPE OF EQUIPMENT? Evaporative cooling is the most energy efficient form of cooling that exists. Equipment cost is lower than a refrigeration system. Installation is simple and inexpensive. Reduced operating costs compared to expensive refrigeration system. Maximum comfort when you need it most. The hotter and drier the air, the greater the cooling. Provides fresh air to building, forcing stale air out. Provides fresh air ventilation anytime by just turning off the indirect and/or direct evaporative cooling section. The blower continues to supply fresh filtered air to the building. Flexible design allows you to add return air capability, indirect fired gas fired heating section and other components to fit any application. WHY USE AZTEC UNITS? All standard A Series units are ETL listed and have undergone years of development to produce one of the finest Indirect and Indirect/Direct Evaporative Cooling units in the industry. This assures the owner of equipment reliability and conformance to recognized standards. Units are designed for outdoor application, either roof or grade mounted with standard models in different cabinet sizes, and range in size from,000 to 7,00 CFM. Larger models are also available. Contact your local Aztec representative or the factory for more information. Indirect fired gas heating sections with two pass drum and tube design and capacities up to,00 MBH input are available on standard units. Entire primary and secondary heat exchanger is constructed of 00 series stainless steel. Inputs up to 600 MBH incorporate the Digital High Turndown modulating power gas burner (pat.,709,0) with individually controlled variable speed combustion air blower motor and motorized gas valve for linkageless design. Larger inputs incorporate standard modulating power gas burners. If gas is not accessible, steam or hot water coils or electric heating elements are also available. Aztec s long term perspective is that all standard air handlers are built to last. We use only top quality components and design units for quick access to simplify routine maintenance. Every unit is tested and run at the factory before shipment. This insures customer satisfaction and minimizes field start up problems. Factory approved start up service is also available on all units.

3 Aztec Features Indirect Section: Direct drive centrifugal, backward airfoil, SWSI plenum type blower(s) rated in accordance with AMCA Standard and bearing the AMCA seal. U.L. Listed three phase supply fan motor(s) Variable frequency drive for supply air blower motor(s). Internal seismicrated blower/motor isolation with flexible ducting between blower(s) and unit casing. Stainless steel integral cooling tower with Turbodek media and submersible pump(s). 6 row, aluminum fin/copper tube indirect cooling coil section PVC plumbing Adjustable sump water bleedoff valve assembly in cooling tower section Low sump water level shutoff switch in cooling tower section Automatic fill and drain system Cabinet constructed of galvanized steel with corrosionresistant enamel finish Formed galvanized steel channel base and intermediate equipment supports. Suitable for slab or curb mounting. Supply air, front access, nominal MERV filters. Hinged, double wall, insulated access door(s). Weather resistant, outside air intake louvers and birdscreen. One side hinged for filter access. Integral control box. DDC control system Listed by ETL Testing Laboratories. Direct Section: deep Turbodek media Stainless steel direct evaporative section Adjustable sump water bleedoff valve Low sump water level shutoff switch Automatic fill and drain system U.L. listed, single phase submersible pump Heating Section: Stainless steel heat exchanger and secondary tubes Power type gas burner with integral combustion air blower and motor, and combustion air proving switch Solidstate ignition control system Integral venting system ETL listed gasfired duct furnace Equipment Options: Insulated cabinet Double wall and roof cabinet construction Mixing section with return air and outside air dampers or high full perimeter roof curb Direct drive centrifugal, backward airfoil, SWSI plenum type fan arrays MERV and MERV supply air filters Fiberdek media meeting UL Class rating Direct expansion or chilled water cooling coil Variable frequency drive on cooling tower fan Smoke detector Firestat Copper plumbing UL labeled control panel MODEL DESIGNATION ASC X A 0 X X Aztec Sensible Cooling Equipment Heating Options: Nominal Face Area of 00 No Heating Options Evaporative Section Media IF Indirect Fired Furnace Section (Square Feet) HW Hot Water Coil SC Steam Coil Number of Stages of Evaporative Cooling: ER Electric Resistance Coil One Stage Two Stage Supply Air Fan Provided Aztec Series Designation: Evaporative Cooling Section Options: A Series A Indirect (Dry) 0 Indirect/Direct

4 LEAVING AIR TEMPERATURE PERFORMANCE TABLES EAWB THERMAL PERFORMANCE INDIRECT EVAPORATIVE COOLING UNITS Entering Air Temperature Dry Bulb Temp. (EADB) F 0 F F 90 F 9 F 00 F 0 F 0 F F WB DB WB DB WB DB WB DB WB DB WB DB WB DB WB DB WB Notes:. Indirect evaporative cooling performance is based on 7% saturation efficiency. THERMAL PERFORMANCE INDIRECT/DIRECT EVAPORATIVE COOLING UNITS Entering Air Temperature Dry Bulb Temp. (EADB) EAWB F 0 F F 90 F 9 F 00 F 0 F 0 F F WB DB WB DB WB DB WB DB WB DB WB DB WB DB WB DB WB Notes:. Indirect evaporative cooling performance is based on 7% saturation efficiency.. Direct evaporative cooling performance is based on % saturation efficiency.. See formula below to calculate saturation efficiency for Indirect/Direct Evaporative Cooling Performance. FORMULA: EXAMPLE: SE = (OA db LA (OA db OA db) wb) x 00 Find Saturation Efficiency for Indirect/Direct system installed in Salt Lake City, UT (Use 9/66 Entering Air Temps in chart above). Where: SOLUTION: SE = Saturation Efficiency OA db = Outside Air Dry Bulb temperature LA db = Leaving Air Dry Bulb temperature OA wb = Outside Air Wet Bulb temperature SE = (9 60.) (9 66) x 00 = 0%

5 TYPICAL DESIGN CONDITIONS CHART State City DB F WB F AL Birmingham 9 7 Flagstaff 6 6 AZ Phoenix 0 76 Tucson 0 7 AR Fort Smith Little Rock 9 0 Bakersfield 0 7 Los Angeles 70 CA Sacramento 00 7 San Diego 7 San Francisco 6 Denver 9 6 CO Grand Junction 97 6 Pueblo 9 6 Jacksonville 9 0 FL Orlando 9 79 Pensacola 9 GA Atlanta, GA 9 77 ID Boise Coeur d'alene 9 6 Chicago 9 79 IL Decatur 9 79 Rockford 9 7 Evansville 9 79 IN Indianapolis 9 7 South Bend IA KS Des Moines Salina Dubuque Wichita Bowling Green 9 7 KY Lexington 9 77 Louisville 9 79 Paducah 9 0 LA New Orleans 9 Shreveport 97 0 Detroit MI Grand Rapids 9 76 Saginaw MN Minneapolis 9 77 Rochester 76 Kansas City MO Springfield 9 7 St Louis 9 79 State City DB F WB F MT NE NV Billings Lincoln Las Vegas Great Falls Omaha Reno NM Albuquerque, NM 96 6 Albany 7 NY Buffalo 6 7 New York City 9 77 NC ND Greensboro Bismarck Raleigh Fargo Cincinnati 9 7 OH Cleveland 9 76 Columbus 9 77 OK OR PA SC SD Oklahoma City Pendleton Philadelphia Columbia Rapid City Tulsa Portland Pittsburgh Greenville Sioux Falls Knoxville 9 77 TN Memphis 96 0 Nashville 9 7 Amarillo 97 7 Dallas 0 7 TX El Paso 0 70 Houston 97 0 San Antonio 9 7 UT Salt Lake City VA WA WI WY Richmond Seattle Madison Casper Roanoke Spokane Milwaukee Cheyenne

6 EQUIPMENT DATA CHART ,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Indirect Cooling Coil ΔP Direct Evaporative Cooling Media ( Deep) ΔP Indirect Section Exhaust Fan Motor HP Face Area/ Face Model CFM Media Size Velocity Qty/Size Velocity ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7.0 0 x 7. 6 x 0 0. x 6.0 x x.0 6 x x 60.0 x x x x NOTES:. MERV removes over 70% of particles micron size ( Pollen and mold spores) from the airstream.. MERV removes over 0% of particles.0.0 micron size ( Legionella and humidifier dust )from the airstream.. Pressure drop shown is for clean filters. Recommended maximum dirty filter pressure drop is.0" W.C.. MERV removes over % of particles 0..0 micron size ( All bacteria and most tobacco smoke ) from the airstream.. Pressure drop shown is for clean filters. Recommended maximum dirty filter pressure drop is." W.C ) 6 x ) 6 x 0 ) 0 x 0 ) 0 x 6) 6 x 6) 6 x 0 ) 6 x 6) x ) 0 x 9) 0 x 9) 6 x 6) 0 x 9) 6 x 9) 0 x ) x ) x " Supply Air Filters Dampers Pressure Drop (" W.C.) Std MERV Opt MERV Opt MERV Supply Air Louver ΔP Return Air ΔP Outside Air ΔP

7 HEATING CAPACITY CHART Model ASC ASC7 Furnace Max. BTU/hr Min. BTU/hr Max. Temp Min. Temp Press. Drop CFM Model Input Input Rise Rise " W.C IFD60 00,000 6, IFD60 00,000 6, IFD0 00,000 6, IFD60 00,000 6, ASC IFD0 00,000 6, IFD0 00,000 6, ASC IFD0 600,000 6, IFD0 00,000 6, ASC IFD0 600,000 6, , , ,0 IFD0 600,000 6, ASC, , ,0 IFD00,000,000 9, , , IFD0 600,000 6,000, ASC0, ,70 IFD00,000,000 9, , , ,00 IFD00,000,000 9,.. 0. ASC0 0, , ,00 IFD0,00,000, , , ASC0,00 IFD0,00,000, , , ASC60 7,00 IFD0,00,000, , ASC7 0, IFD0,00,000,9,

8 BLOWER PERFORMANCE CHART WITH STANDARD ARRANGEMENT FAN(S) Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."."." 7.0" 7.0" 0.0" 7.0" 7.0" 0.0" SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES: MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM ) Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM ) Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing ) The selections above are based on Total Static Pressure (TSP). To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP / / / / 7/ 7/ 7/ @ / / / 7/ 7/ 7/ 7/ 7/ 7/ / 7/ 7/ 7/ 7/ 7/ / / 7/ 7/ 7/ 0 7/

9 BLOWER PERFORMANCE CHART WITH STANDARD ARRANGEMENT FAN(S) Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."."." 7.0" 7.0" 0.0" 7.0" 7.0" 0.0" SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES:. MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM. Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing. The selections above are based on Total Static Pressure. To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP / 7/ 7/ 7/ @ / 7/ 7/ 7/ / 7/ 7/ @ / 7/ 7/ @ @ 9

10 BLOWER PERFORMANCE CHART FOR FAN ARRAY Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."." 0.0" 6."."."."."." SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES:. MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM. Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing. The selections above are based on Total Static Pressure (TSP). To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP Not 97 Available / 00 7 / Not 6 Available / / Not 7 @ / @ 0 0

11 BLOWER PERFORMANCE CHART FOR FAN ARRAY Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."." 0.0" 6."."."."."." SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES:. MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM. Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing. The selections above are based on Total Static Pressure. To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP Not 97 Available / 00 7 / Not 6 Available / / Not @ / @ @

12 BLOWER PERFORMANCE CHART FOR FAN ARRAY WITH 00% REDUNDANCY Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."." 0.0" 6."."."."."." SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES:. MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM. Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing. The selections above are based on Total Static Pressure (TSP). To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP Not 97 Available / 00 7 / Not 6 Available / / Not / @

13 BLOWER PERFORMANCE CHART FOR FAN ARRAY WITH 00% REDUNDANCY Model ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 SCFM,00,000,00,00,000,00,00,0,000,000 6,0 7,00 7,00,70 0,000 0,000,0,00,00,70,000,000 7,00 0,000 0,000,00,000,000 7,00 0,000 0,000,70 7,00 Fan and Motor Qty Fan Size.0"."."." 0.0" 6."."."."."." SUPPLY AIR FAN PERFORMANCE TABLE AT STANDARD CONDITIONS FEG NOTES:. MHP = Motor Horse Power FEG = Fan Efficiency Grade Fan RPM Fans are Direct Drive Single Width, Single Inlet (SWSI) Plenum Fan(s) Motor RPM. Equipment can be supplied with CFM different from those stated, contact factory for selection and pricing. The selections above are based on Total Static Pressure. To find the system Total Static Pressure: add supply duct static, return duct static, and applicable components from Equipment Data Chart on page 6. TSP System Total Static Pressure (Inches W.C.) Fan Motor Fan Motor Fan Motor MHP RPM RPM MHP RPM RPM MHP RPM RPM MHP Not 97 Available / 00 7 / Not 6 Available / / Not @ / / @ @ NA NA / / @ 0

14 ASC AMP DRAW TABLE ITEM A B SOURCE Blower Motor(s) Controls (Cooling Only) Controls (Cooling and Heating) Motor Horsepower AMPS / / Motor Qty Motor Qty Motor Qty Motor Qty 00 V Ph V Ph V Ph V Ph V Ph Motor Horsepower AMPS 7/ 0 Motor Qty Motor Qty Motor Qty Motor Qty 00 V Ph V Ph V Ph V Ph V Ph Motor Horsepower AMPS 0 0 Motor Qty Motor Qty Motor Qty Motor Qty 00 V Ph V Ph V Ph V Ph V Ph Pump(s) and Control Circuit Amps AMPS Indirect Unit Size Indirect/Direct Unit Size V Ph V Ph V Ph V Ph V Ph.. CF 6. CF CF.7.7 CF 0.0 CF CF Pump(s) and Control Circuit Amps AMPS Indirect Unit Size Indirect/Direct Unit Size V Ph V Ph V Ph V Ph V Ph.. CF 7. CF CF.7.7 CF 0.0 CF CF NOTES ) CF = Contact Factory ) Above motor amps are based on 0 edition of NEC. ) Control circuit amps are based on standard controls. Steps to Size Optional Disconnect Switch:. Find the Indirect Section Exhaust Fan Motor HP from chart on page.. Find amp draw for Indirect Section Exhaust Fan Motor HP from chart in Item A above.. Find the blower motor HP required from charts on pages 9.. Find amp draw for blower motor HP from chart in Item A above.. Find amps for controls from chart in Item B above. 6. Add amps from steps, and, then multipy by..

15 FAN EFFICIENCY In order to reduce fanenergy consumption in commercial HVAC systems across the US, the industry has initiated the development of a federal efficiency standard for commercial and industrial fans. The FEG, or Fan Efficiency Grade, was developed as a means to measure fan efficiency. The FEG is an indicator of the air moving device s aerodynamic quality and is calculated using the fan s peak total efficiency and fan size. ASHRAE Standard 90.0 states that fans shall achieve an FEG of 67 or higher based on the manufacturer s certified data, as defined by AMCA 0. The total efficiency of the fan at the design point of operation shall be within percentage points of the maximum total efficiency of the fan. The air handler used in the Aztec ASC Series of evaporative cooling unit incorporates Direct Drive Plenum Fan(s). The backward inclined airfoil wheels used here have the highest efficiency of all centrifugal fan designs. The high efficiency wheel combined with the direct drive motor eliminates belt drive losses and offers a compact spacesaving design. By eliminating the belt drive package, maintenance costs for the belts and bearings are also eliminated. The direct drive motor is also connected to a Variable Frequency Drive (VFD) controller to vary the airflow as needed as design conditions change throughout the day or year.

16 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH STANDARD ARRANGEMENT FAN(S) AND END DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A ,070,0 A ,7,770 A ,790,6,90 A ,90,0,0 6

17 7 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH STANDARD ARRANGEMENT FAN(S) AND END DISCHARGE ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC /6 7/6 7/6 0 66/ /6 0/ /6 0/6 0/6 0/6 0/ MODEL DIMENSIONS R N M 0/6 0/6 /6 /6 0 / / / / 9/ / / / / 6 / 0/ 0/ 0/ 9/ / / 7/ /6 6 / / 66/ / / 99/ 7/ 7/ / / / 7/ / / 6 6 / / / 66/ 7/ 0/ 9/ 9/ / 0 9/6 9/6 7/ DIMENSIONS /6 90/6 0/ / / A B C D E F G H K MODEL W 9/6 0/6 / 9/ 9/ 9/ U / 77/ 77/ T 7/ 7/ /6 9/ 7/ V 0 / 9/ 9/ 60/ 60/ 7/ /6 /6 90/ 9 9 0/ S 6/ 6/ 6/ / / / 60/ 60/ 7/ 7/ / 7/ 9/ 9/ 0/ 7/ 7/ 7/ L / 9/ / / 9/ 9/ / 6/

18 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH STANDARD ARRANGEMENT FAN(S) AND DOWN DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A ,770,9 A ,70,,60 A ,0,6,790 A ,60,0 6,70

19 9 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH STANDARD ARRANGEMENT FAN(S) AND DOWN DISCHARGE ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 60/ 7/ /6 /6 90/ / / / 0 60/ 60/ 7/ 7/ / 6 / 0/ MODEL DIMENSIONS S O N 6/ 6/ 6/ / / / 6/ / / / / 6 9/ / 9/ / / 9/ / / 7/ /6 6 / 66/ 0/ 0/ / / 99/ 7/ 7/ / 9/ 07/ / / 7/ / / 6 6 / / / 66/ 7/ 0/ 9/ 9/ 0/ 0 /6 0/6 07/ DIMENSIONS /6 0/6 7/ 9/6 79/ A B C D E G H K L MODEL X 7 0 V 0 / 9/ 9/ 60/ U / 77/ 77/ 9/ W 9/6 0/6 / 9/ 9/ 9/ 9/ 7/ 7/6 7/6 7/6 T 7/ 7/ / M / / / / 7/ 9/ 9/ 0/ 7/ 7/ 7/

20 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH FAN ARRAY AND END DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A0 NA NA NA ,6 9,7 0,9,6 A NA NA NA ,6 9,6 0,960,00 A0 NA NA NA ,990,0,090,60 A NA NA NA ,97,,,60 0

21 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH FAN ARRAY AND END DISCHARGE MODEL ASC A B C D / 7 66/ DIMENSIONS E F G H K / 0 / /6 ASC0 /6 66/ / 0 6 ASC 0/6 9 7/ 66/ / 9/ ASC0 / 9 0/ 7/ 0 70 / ASC / / 0 79 / / ASC0 9/6 9/ / 0 0/ / ASC60 9/6 07/ 99/ 0/ / ASC7 7/ / 7/ 0/ 6 MODEL L M N R DIMENSIONS S T U V W ASC / / 0 /6 / 77/ 9/ 9/ ASC0 9/ 7/ 0 /6 / 6 77/ 9/ 9/ ASC 9/ 9/ 0 0/6 / 77 77/ 60/ 9/ ASC0 / 9/ 0 0/6 60/ / 9/ ASC0 6/ 0/ 6 0/6 60/ 7 7/ ASC0 7/ 66 0/6 7/ 9 7/6 /6 ASC60 7/ 7 0/6 7/ 9 7/6 /6 ASC7 7/ 7 0/6 / 0/ 7/6 90/ 7/

22 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH FAN ARRAY AND DOWN DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A0 NA NA NA , 9,90 0,99, A NA NA NA ,7 0,9,660,960 A0 NA NA NA ,0,6,790,0 A NA NA NA ,,7,0 6,00

23 DIMENSIONAL DATA FOR COOLING ONLY UNITS WITH FAN ARRAY AND DOWN DISCHARGE MODEL ASC A B C D 9/6 7 66/ DIMENSIONS E G H K L / / /6 / ASC0 79/6 66/ / 6 9/ ASC 9/6 9 7/ 66/ 70 9/ 9/ 9/ ASC0 0/ 9 0/ 7/ 70 / / ASC / / 79 / / 6/ ASC0 /6 9/ / 0/ / ASC60 0/6 07/ 99/ 0/ / ASC7 07/ / 7/ 0/ 6 MODEL M N O S DIMENSIONS T U V W X ASC / 0 0 / 77/ 9/ 9/ ASC0 7/ 0 / 6 77/ 9/ 9/ ASC 9/ 0 0 / 77 77/ 60/ 9/ ASC0 9/ 0 60/ / 9/ 7 ASC0 0/ / 7 7/ 0 ASC0 7/ 66 7/ 9 7/6 /6 ASC60 7/ 7 7/ 9 7/6 /6 ASC7 7/ 7 / 0/ 7/6 90/ 7/ 6

24 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH STANDARD ARRANGEMENT FAN(S) AND END DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A ,0,6,0 6,0 A ,,,09 6,97 A ,60,0 6,, A ,60, 6, 7,0 9,600

25 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH STANDARD ARRANGEMENT FAN(S) AND END DISCHARGE FURNACE DIMENSIONS MODEL SIZE A B C D E F G H I J K ASC IFD60 /6 / 6 6/ 6 0 7/ / ASC7 IFD60 /6 6 / 6 / / / ASC7 IFD0 /6 6 / 6 / / / ASC0 IFD60 / 6 / 7/ 0 6 7/ 7/ ASC0 IFD0 / 6 / 7/ 0 6 7/ 7/ ASC IFD0 77/6 7 66/ / 0 / 77/ /6 ASC IFD0 77/6 7 66/ / 0 / 77/ /6 ASC0 IFD0 9/6 66/ / 0 67/ 6 ASC0 IFD0 9/6 66/ / 0 67/ 6 ASC IFD0 09/6 9 7/ 66/ / 9 9/ ASC IFD00 09/6 9 7/ 66/ / 9 9/ ASC0 IFD0 / 9 0/ 7/ / / ASC0 IFD00 / 9 0/ 7/ / / ASC0 IFD / / 0 79 / 69 0/ / ASC0 IFD / / 0 79 / 69 0/ / ASC0 IFD0 6/6 9/ / 0 0/ 69 / / ASC60 IFD0 67/6 07/ 99/ 0/ 69 / / ASC7 IFD0 77/ / 7/ 0/ 69 / 6 MODEL FURNACE SIZE L M N P Q DIMENSIONS R ASC IFD60 / / 7/ 77/ 0/6 6/ 7/ /6 ASC7 IFD60 9/ / 67/ 7/ 0/6 6/ 7/ 69 0/6 ASC7 IFD0 9/ / 67/ 7/ 0/6 6/ 7/ 69 0/6 ASC0 IFD60 / / 7/ 7/ /6 6/ 69 / / ASC0 IFD0 / / 7/ 7/ /6 6/ 69 / / ASC IFD0 / / 0 77/ 97/ /6 / 77/ 9/ 9/ ASC IFD0 / / 0 77/ 97/ /6 / 77/ 9/ 9/ ASC0 IFD0 9/ 7/ 0 67/ 007/ /6 / 6 77/ 9/ 9/ ASC0 IFD0 9/ 7/ 0 67/ 007/ /6 / 6 77/ 9/ 9/ ASC IFD0 9/ 9/ 0 0/6 / 77 77/ 60/ 9/ ASC IFD00 9/ 9/ 0 0/6 / 77 77/ 60/ 9/ ASC0 IFD0 / 9/ 0 / / 0/6 60/ / 9/ ASC0 IFD00 / 9/ 0 / / 0/6 60/ / 9/ ASC0 IFD00 6/ 0/ 6 0/ 6/ 0/6 60/ 7 7/ ASC0 IFD0 6/ 0/ 6 0/ 6/ 0/6 60/ 7 7/ ASC0 IFD0 7/ 66 / / 0/6 7/ 9 7/6 /6 ASC60 IFD0 7/ 7 / / 0/6 7/ 9 7/6 /6 ASC7 IFD0 7/ 7 / / 0/6 / 0/ 7/6 90/ 7/ S T U V W

26 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH STANDARD ARRANGEMENT FAN(S) AND DOWN DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A ,,9,0 7,00 A ,,7,79 7, A ,90,70,9 6,9 9,07 A , 0,99,69 7,07,7 0,60 6

27 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH STANDARD ARRANGEMENT FAN(S) AND DOWN DISCHARGE FURNACE DIMENSIONS MODEL SIZE A B C D E G H I J K L ASC IFD60 /6 / 6 6/ 0 7/ / / ASC7 IFD60 7/6 6 / 6 / 6 67/ / 9/ ASC7 IFD0 7/6 6 / 6 / 6 67/ / 9/ ASC0 IFD60 9/ 6 / 7/ 6 7/ 7/ / ASC0 IFD0 9/ 6 / 7/ 6 7/ 7/ / ASC IFD0 /6 7 66/ / / 77/ /6 / ASC IFD0 /6 7 66/ / / 77/ /6 / ASC0 IFD0 /6 66/ / 67/ 6 9/ ASC0 IFD0 /6 66/ / 67/ 6 9/ ASC IFD0 /6 9 7/ 66/ 70 9/ 9 9/ 9/ ASC IFD00 /6 9 7/ 66/ 70 9/ 9 9/ 9/ ASC0 IFD0 60/ 9 0/ 7/ 70 9 / / / ASC0 IFD00 60/ 9 0/ 7/ 70 9 / / / ASC0 IFD / / 79 / 69 0/ / 6/ ASC0 IFD / / 79 / 69 0/ / 6/ ASC0 IFD0 /6 9/ / 0/ 69 / / ASC60 IFD0 9/6 07/ 99/ 0/ 69 / / ASC7 IFD0 97/ / 7/ 0/ 69 / 6 MODEL FURNACE SIZE M N O P Q DIMENSIONS S ASC IFD60 / 7/ 77/ 6/ 7/ /6 7 ASC7 IFD60 / 6 67/ 7/ 6/ 7/ 69 0/6 0 ASC7 IFD0 / 6 67/ 7/ 6/ 7/ 69 0/6 0 ASC0 IFD60 / 0 7/ 7/ 6/ 69 / / ASC0 IFD0 / 0 7/ 7/ 6/ 69 / / ASC IFD0 / / 97/ / 77/ 9/ 9/ ASC IFD0 / / 97/ / 77/ 9/ 9/ ASC0 IFD0 7/ 0 67/ 007/ / 6 77/ 9/ 9/ ASC0 IFD0 7/ 0 67/ 007/ / 6 77/ 9/ 9/ ASC IFD0 9/ 0 0 / 77 77/ 60/ 9/ ASC IFD00 9/ 0 0 / 77 77/ 60/ 9/ ASC0 IFD0 9/ 0 / / 60/ / 9/ 7 ASC0 IFD00 9/ 0 / / 60/ / 9/ 7 ASC0 IFD00 0/ 6 6 0/ 6/ 60/ 7 7/ 0 ASC0 IFD0 0/ 6 6 0/ 6/ 60/ 7 7/ 0 ASC0 IFD0 7/ 66 / / 7/ 9 7/6 /6 ASC60 IFD0 7/ 7 / / 7/ 9 7/6 /6 ASC7 IFD0 7/ 7 / / / 0/ 7/6 90/ 7/ 6 T U V W X 7

28 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH FAN ARRAY AND END DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A0 NA NA NA ,0,790,6 6,70 A NA NA NA ,70,0,0 7,0 A0 NA NA NA ,00,69,0 6,0, A NA NA NA 660 0,0 0,0,60 6,670 7,70 9,90

29 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH FAN ARRAY AND END DISCHARGE MODEL FURNACE SIZE DIMENSIONS E F G H ASC IFD0 77/6 7 66/ / 0 / 77/ /6 ASC IFD0 77/6 7 66/ / 0 / 77/ /6 ASC0 IFD0 9/6 66/ / 0 67/ 6 ASC0 IFD0 9/6 66/ / 0 67/ 6 ASC IFD0 09/6 9 7/ 66/ / 9 9/ ASC IFD00 09/6 9 7/ 66/ / 9 9/ ASC0 IFD0 / 9 0/ 7/ / / ASC0 IFD00 / 9 0/ 7/ / / ASC0 IFD / / 0 79 / 69 0/ / ASC0 IFD / / 0 79 / 69 0/ / ASC0 IFD0 6/6 9/ / 0 0/ 69 / / ASC60 IFD0 67/6 07/ 99/ 0/ 69 / / ASC7 IFD0 77/ / 7/ 0/ 69 / 6 MODEL FURNACE SIZE A B C D L M N P Q DIMENSIONS R ASC IFD0 / / 0 77/ 97/ /6 / 77/ 9/ 9/ ASC IFD0 / / 0 77/ 97/ /6 / 77/ 9/ 9/ ASC0 IFD0 9/ 7/ 0 67/ 007/ /6 / 6 77/ 9/ 9/ ASC0 IFD0 9/ 7/ 0 67/ 007/ /6 / 6 77/ 9/ 9/ ASC IFD0 9/ 9/ 0 0/6 / 77 77/ 60/ 9/ ASC IFD00 9/ 9/ 0 0/6 / 77 77/ 60/ 9/ ASC0 IFD0 / 9/ 0 / / 0/6 60/ / 9/ ASC0 IFD00 / 9/ 0 / / 0/6 60/ / 9/ ASC0 IFD00 6/ 0/ 6 0/ 6/ 0/6 60/ 7 7/ ASC0 IFD0 6/ 0/ 6 0/ 6/ 0/6 60/ 7 7/ ASC0 IFD0 7/ 66 / / 0/6 7/ 9 7/6 /6 ASC60 IFD0 7/ 7 / / 0/6 7/ 9 7/6 /6 ASC7 IFD0 7/ 7 / / 0/6 / 0/ 7/6 90/ 7/ S T I U J V K W 9

30 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH FAN ARRAY AND DOWN DISCHARGE Model Unit Shipping Weight (lbs) Unit Operating Weight (lbs) ASC ASC7 ASC0 ASC ASC0 ASC ASC0 ASC0 ASC0 ASC60 ASC7 A0 NA NA NA ,90,0, 7,0 A NA NA NA ,0,00 6,00,6 A0 NA NA NA ,0, 6,60 7,0 9,0 A NA NA NA ,00,,0 7,00,00 0,790 0

31 DIMENSIONAL DATA FOR COOLING/HEATING UNITS WITH FAN ARRAY AND DOWN DISCHARGE MODEL ASC IFD0 /6 7 66/ / / 77/ /6 / ASC IFD0 /6 7 66/ / / 77/ /6 / ASC0 IFD0 /6 66/ / 67/ 6 9/ ASC0 IFD0 /6 66/ / 67/ 6 9/ ASC IFD0 /6 9 7/ 66/ 70 9/ 9 9/ 9/ ASC IFD00 /6 9 7/ 66/ 70 9/ 9 9/ 9/ ASC0 IFD0 60/ 9 0/ 7/ 70 9 / / / ASC0 IFD00 60/ 9 0/ 7/ 70 9 / / / ASC0 IFD / / 79 / 69 0/ / 6/ ASC0 IFD / / 79 / 69 0/ / 6/ ASC0 IFD0 /6 9/ / 0/ 69 / / ASC60 IFD0 9/6 07/ 99/ 0/ 69 / / ASC7 IFD0 97/ / 7/ 0/ 69 / 6 MODEL FURNACE SIZE FURNACE SIZE DIMENSIONS A B C D E G H I M N O P Q DIMENSIONS S ASC IFD0 / / 97/ / 77/ 9/ 9/ ASC IFD0 / / 97/ / 77/ 9/ 9/ ASC0 IFD0 7/ 0 67/ 007/ / 6 77/ 9/ 9/ ASC0 IFD0 7/ 0 67/ 007/ / 6 77/ 9/ 9/ ASC IFD0 9/ 0 0 / 77 77/ 60/ 9/ ASC IFD00 9/ 0 0 / 77 77/ 60/ 9/ ASC0 IFD0 9/ 0 / / 60/ / 9/ 7 ASC0 IFD00 9/ 0 / / 60/ / 9/ 7 ASC0 IFD00 0/ 6 6 0/ 6/ 60/ 7 7/ 0 ASC0 IFD0 0/ 6 6 0/ 6/ 60/ 7 7/ 0 ASC0 IFD0 7/ 66 / / 7/ 9 7/6 /6 ASC60 IFD0 7/ 7 / / 7/ 9 7/6 /6 ASC7 IFD0 7/ 7 / / / 0/ 7/6 90/ 7/ 6 T U J V K W L X

32 DIMENSIONAL DATA Roof Curb C000

33 PLUMBING Typical Piping C0007

34 CONTROLS MDT Expert C00070

35 CONTROLS MRT Expert C00079

36 UNIT SHALL BE GROUNDED ACCORDING TO THE LATEST PROVISIONS OF NEC CUSTOMER EXHAUST FAN INTERLOCK (JUMPER IF NOT USED) FU0 CAUTION: OPEN & LOCK OUT MAIN DISCONNECT SWITCH BEFORE SERVICING EQUIPMENT. 0 VAC TR0 FU09 TO FU COMPONENT IDENTIFICATION TS0 INLET AIR TEMPERATURE SENSOR TS0 SPACE TEMPERATURE SENSOR CT0 CURRENT TRANSDUCER TS0 SUPPLY AIR TEMPERATURE SENSOR TS0 MIXED AIR TEMPERATURE SENSOR FD0 MAIN SUPPLY FAN VARIABLE FREQUENCY DRIVE FD0 COOLING TOWER FAN VARIABLE FREQUENCY DRIVE UC0 UNIT CONTROL MODULE HT0 VW0 INDIRECT EVAP WAY N/O DRAIN LINE SOLENOID VALVE FU RE MT FU09 CONTROL TRANSFORMER FUSE VW0A DIRECT EVAP WAY N/O DRAIN LINE SOLENOID VALVE 9 FU0 CONTROL CIRCUIT FUSE VW INDIRECT EVAP WAY N/C SUPPLY LINE SOLENOID VALVE RE RE FU MAIN DISCONNECT FUSE VWA DIRECT EVAP WAY N/C SUPPLY LINE SOLENOID VALVE FU INDIRECT WATER PUMP MOTOR FUSE VW INDIRECT EVAP WAY N/O DRAIN LINE SOLENOID VALVE FU RE6 MT0 FU DIRECT WATER PUMP MOTOR FUSE 0 RE RE6 60//60 ADDITIONAL MIXING BOX ACTUATORS WIRED IN MT PARALLEL AS REQUIRED () O/AN/C, R/AN/O TO UC0 VAC 0 () FD0 TR06 RE7 6 7 UC0 VW 6 VW VW0 HS0 HUMIDITY TRANDUCER SW0 HT0 ELECTRIC ENCLOSURE HEATER FU KP0 KEYPAD/DISPLAY MODULE (REMOTE) TO CB09 MT0 MAIN SUPPLY FAN MOTOR RUN THIS WIRE THROUGH THE CURRENT MT0 COOLING TOWER FAN MOTOR TRANSDUCER (CT0) APERTURE. MT MIXING BOX DAMPER MOTOR MT0 DIRECT EVAP RECIRCULATING WATER PUMP MT INDIRECT EVAP RECIRCULATING WATER PUMP FD0 PB0 POWER DISTRIBUTION BLOCK L L T T MT0 UC0 7 7 TO NEXT PAGE MAIN SUPPLY FAN VFD (FD0) PARAMETERS FOR DDC CONTROL P00 0 P0.0 P P P0 motor current X00 drive output current P 0 P0 0 P60.0 PS0 MAIN AIRFLOW SWITCH W VWA PS CLOGGED FILTER SWITCH A VW0A PT BUILDING PRESSURE TRANSDUCER 0 () RE SECOND STAGE COOLING RELAY TO UC0 RE FIRST STAGE COOLING RELAY () RE INDIRECT EVAP PUMP RELAY TO NEXT RE6 DIRECT EVAP PUMP RELAY INTERLOCKING RELAY PAGE RE7 UNIT ENABLE RELAY FD0 L RE7 INTERLOCKING RELAY RE7 L W A RS0 RESISTOR K OHM 0 RS0 RESISTOR K OHM () RS0 RESISTOR.0K OHM TO UC0 RS0 RESISTOR.06K OHM () T RE7 T T MT0 T 0 TO UC0 SW0 MAIN DISCONNECT SWITCH SW09 00 PERCENT OUTSIDE AIR SWITCH SW0 INDIRECT EVAP LOW WATER LEVEL CUTOFF SWITCH SW DIRECT EVAP LOW WATER LEVEL CUTOFF SWITCH SW7 AUXILIARY UNIT ENABLE SWITCH TR0 CONTROL CIRCUIT TRANSFORMER TR0 LOW VOLTAGE TRANSFORMER TR06 LOW VOLTAGE DAMPER TRANSFORMER N N U V U V CONTROLS Typical Wiring Cooling Only Unit (Pg of ) C00077 C00077 For complete summary of DDC Program, go to: leuploads/literature/altonaztec/all%0products/aztec%0ddc%0summary.pdf 6

37 CONTROLS Typical Wiring Cooling Only Unit (Pg of ) C0007 C0007 BACnet VAC, 060 Hz 0VA, 0.A Use Copper Conductors Only Full Vac GND Rnet Half LON Interface Tx Rx Net Net Gnd Local Access Address 0's 's Options TPI Off On Format BT Port Port ARC6 Only I/O Flex 66 Off Power On Batt CR0 Rnet Port b* Rnet Local Access Gnd Gnd Rnet Rnet Rnet Rnet V V Sense Run 0's Module Address 's Format Full Half Duplex Error Tx Rx Tx Net n/c n/c Unused 6 7 Rx Rx EIA EIA BT Port a Port a w w Net Tx Tx Rx DTR DCD Signal Ground CONTROL MODULE k.k LON BACnet Gnd UI UI Gnd UI0 UI09 Gnd UI0 UI07 Gnd UI06 UI0 Gnd UI0 UI0 Gnd UI0 Pulse Count Ability UI0 Aux Pwr Out Aux Gnd V V Pwr Out Hot 76.k 0mA Gnd Baud Rate AO6 Network Switches (0 = off, = on) Gnd Protocol 7 6 MSTP (m) AO MSTP (s) PTP Gnd N 0 0 AO Modbus Gnd SLTA 0 *PlugIn 0 AO *Ethernet Gnd AO Mode Select AO 0mA 0V Gnd Tx Rx 0V BO6 BO BO BO BO BO AO Xnet Remote Expansion Unused Universal 00V Input RTD Therm Dry 00mA Even Odd V IN IN0 IN0 IN06 IN0 IN0 IN IN09 IN07 IN0 IN0 IN0 0V 0V V Mode Select Gnd Xnet Xnet

38 CONTROLS Typical Wiring Cooling/Heating Unit (Pg of ) C00076

39 CONTROLS Typical Wiring Cooling/Heating Unit (Pg of ) C

40 CONTROLS Typical Wiring Cooling/Heating Unit (Pg of ) C

41 AZTEC ASC TYPICAL SPECIFICATIONS.0 GENERAL. (Choose one) Furnish and install a A0 Series Aztec ASC A0 Packaged Indirect HVAC unit complete with blower section, direct drive motor/blower, flat bank filter section, integral cooling tower, indirect cooling coil section, and inlet louver with birdscreen. The entire unit is to be manufactured by Aztec Sensible Cooling, Dallas, Texas or an approved equal. The unit shall include all components and accessories as set forth herein. Furnish and install a A Series Aztec ASC A Packaged Indirect/Direct Evaporative HVAC unit complete with blower section, direct drive motor/blower, flat bank filter section, integral cooling tower, indirect cooling coil section, direct evaporative cooling section and inlet louver with birdscreen. The entire unit is to be manufactured by Aztec Sensible Cooling, Dallas, Texas or an approved equal. The unit shall include all components and accessories as set forth herein.. Unit shall be designed to insure against air stratification across filters and evaporative cooling media. Air velocities across filters and evaporative cooling media shall not exceed 00 FPM.. Complete unit shall be ETL listed. All units shall be built up with orientation and connection locations as indicated on drawings.. Capacities shall be as scheduled on drawings and/or equipment schedule..0 CABINET. The unit shall consist of sections required to incorporate the components indicated on the plans and schedule.. The wall and roof panels of the unit shall be fabricated of heavy gauge galvanized steel formed members. The walls and roof structure shall accommodate up to " of insulation.. The wall panels shall form a selfframing casing with no additional structural support required. All panels shall be sealed airtight with a sealant.. The floor panels will be built with " interlocking standing seam and be suitably reinforced with framing members as required to support the internal components of the unit and be both water and airtight.. Access doors shall be of the double wall, insulated type and provided with live neoprene bulb gaskets, hinges, and latches capable of applying additional sealing as required..6 The roof of the unit shall have a minimum / interlocking standing seam construction. All seams will be caulked and sealed to be weathertight and airtight..7 All exterior surfaces shall be cleaned to prepare the galvanized surface before applying a specially formulated corrosion resistant combination prime and finish coating of durable 00 hour salt spray resistant, dark tan, acrylic enamel..0 STRUCTURAL BASE. Unit or individual unit section shall be fabricated with either a rigidly formed gauge galvanized steel or structural steel base frame electrically welded to form a rigid chassis suitably reinforced and braced to permit the loading, shipping, unloading, rigging, and general handling of the completed sections without damage to assembled components due to normal handling techniques. If fabricated in sections, they shall be joined together by bolting. Structural components shall be of such design as to provide adequate support for each section and the complete assembly when the unit is supported around its base perimeter.. Lifting lugs shall be provided as required for each section.. Base frame of each section shall be designed to accept full perimeter roof curb as shown in drawings. Base frame and outside casing shall be specifically designed to shed water away from all curb penetrations..0 INSULATION. Wall panels, roof, and floor shall be insulated with " thick, /# density mat faced fiberglass insulation.. Insulation shall meet the requirements of the following codes and specifications: NFPA 90A and NFPA 90B ASTM C 07 Type II TIMA Standard AHC0 HHIB Type II Insulation will be tested in accordance with ASTM E, UL 7, and NFPA and will not exceed: Flame spread 0 Smoke Developed. Insulation shall be held in place with adhesive and mechanical fasteners. The mechanical fasteners shall be spaced in accordance with the latest edition of SMACNA HVAC Duct Construction standards..0 SUPPLY AIR BLOWER SECTION. The blower section shall include centrifugal, backward airfoil SWSI plenum type blower and shall be complete with direct drive motor. The blower in accordance with AMCA (Air Movement and Control Association) Standard 0. The blowers shall be designed to operate without conventional scroll housing. All blower wheels shall have tapered and spun wheel cones or shrouds providing stable flow and high rigidity. The wheels shall be nonoverloading type. The blades shall be continuously welded, airfoil type, designed for maximum efficiency and quiet operation. All air ratings are based on delivery against the external static pressure specified with all optional equipment in place and operating. All blowers will be dynamically balanced on precision electronic vibration amplifying equipment to insure quiet, smooth running, trouble free operation. Flexible ducting shall be provided between blower inlet and unit casing.. Blower motor shall be designed to suit the characteristics of the available electric service shown on drawings. Motor will be (energy efficient ODP).. Motor and blower assembly shall be mounted on a common structural steel base under which vibration isolators shall be anchored to the floor. Vibration isolators shall be spring type with seismic restraint to restrict vertical and horizontal motion. The isolation base shall be complete with hold down bolts and wood blocking to maintain the isolation base in rigid position for shipping.. Supply fan motor shall be controlled by Variable Frequency Drive (VFD). The DDC control system will modulate the VFD to maximize system efficiency and performance based on sensed environmental conditions. The VFD shall be mounted inside cabinet suitable for rooftop applications.

42 AZTEC ASC TYPICAL SPECIFICATIONS 6.0 INDIRECT EVAPORATIVE COOLING SECTION 6. The indirect evaporative cooling section of the unit shall consist of an indirect cooling coil [A] and an integral cooling tower [B] as described below: A. INDIRECT COOLING COIL: The indirect cooling coil in the unit shall be of the drainable, counterflow type. The coil s finning material shall be of corrugated type and mechanically bonded to the coil s tubing. The coil shall be equipped with both a drain and vent connection. The header and the supply and return coil connection of the indirect coil shall be copper, located on one end of the coil and internally plumbed at the factory to the recirculating pump provided with the unit s integral cooling tower. The unit s indirect coil drain connection or the chilled water supply line from the cooling tower in the unit, whichever has the lowest drain point, shall be plumbed to the exterior of the unit s housing and provided with a manually operated drain valve. B. INTEGRAL COOLING TOWER: The unit s integral cooling tower shall be provided with the following factory preassembled components: " aluminum mesh, washable type intake air filters; welded stainless steel sump construction; stainless steel housing construction; propeller type, corrosion coated, direct or belt driven exhaust fan; evaporative cooling media; cooling tower cooling media water distribution header or headers; recirculating pump manifold assembly; factory set, calibrated butterfly or ball type brass water balancing valve, factory adjusted, brass lever control valve with a plastic float ball; sump drain connection; sump overflow connection; sump water fill and makeup line connection; adjustable brass water bleed valve with the copper bleed tubing plumbed to the cooling tower s overflow stand pipe; recirculating pump low sump water lever shutoff switch; submersible type recirculating pump. 7.0 DIRECT EVAPORATIVE SECTION (A Series only) 7. The evaporative section(s) shall have a / " deep sump with welded seams and corners. The sump shall be constructed of 0 stainless steel and will be factory leak tested prior to shipment. The remainder of the direct evaporative cooling section shall also be constructed of 0 stainless steel. 7. The cooling media shall be " deep fluted Turbodek, high efficiency evaporative media, impregnated with an insoluble antirot chemical. The face velocity shall be equal to or less than that shown on the air handler schedule, in no case shall the face velocity exceed 00 FPM. 7. The evaporative cooling section shall include a submersible pump with U.L. listed, hermetically sealed, dielectric oilfilled motor and BunaN seal. Horsepower rating of the pump shall not be less than /6 HP. Pump to be centrifugal type. 7. The water distribution system shall be constructed of PVC plumbing and include, but not be limited to, the following items: pump riser; factory installed water regulator valve to permit field adjustment of water flow over media; " drain connection; / " overflow line; / " water control valve; adjustable bleed valve to allow continuous bleed off, thus minimizing the build up of minerals and salts; cleanable water distribution header over the complete width of media..0 CONTROLS. The Aztec DDC system shall include a controller that features universal inputs, 6 analog inputs, and 6 binary outputs. Controller shall have full BACnet compatibility with selectable switch to convert to N or Modbus protocols. Manufacturer will include optional LonTalk conversion where required.. The control program shall be configurable for either a Indirect or a Indirect/Direct Evaporative Cooling System for either zone or supply air temperature control. The unit can be set to run in either a unoccupied or occupied mode.. The supply fan will be enabled, and initialize all other unit functions by: (choose one) (Via an auxiliary unit enable contact provide by the user)(via a contact closure induced by a BACnet/Modbus/N/LonWorks protocol signal sent over the network from the user s building automation system to the DDC controller)(via a userprogrammed timeofday schedule in the WebCTRL interface or the remote BACview keypad) (Via a manual override in the program through the WebCTRL interface). The control functions will include, but not be limited to: Electrical Demand and Total Electrical Usage, Supply Fan Operation, Cooling Tower Operation, Fill and Drain Valve Operation, Clogged Filter Indication and Damper Control.. Upon sensing nonideal operating conditions, the controller will alert the user to an alarm condition that can be monitored via BACview, WecCTRL, or a rd part BAS. The alarms will include, but not be limited to: Room Sensor Failure, Supply Air sensor Failure, Supply Fan Failure, Freezestat, Clogged Filter, Cooling Stage Maintenance, Cooling Stage Maintenance, Cooling Stage Water Level Failure, Cooling Stage Water Level Failure, and Point Locked..6 Unit will be controls will be set for: (choose one) MDTExpert Control System for Modulating Discharge Temperature Control with BACview controller. MRTExpert Control System for Modulating Room Temperature Control with BACview controller. 9.0 OUTSIDE AIR INLET LOUVER 9. Louver frame and blades shall be galvanized steel with riveted or welded construction. 9. Louver shall include galvanized birdscreen. 9. Louver design shall be of the drainable type and be tested to AMCA Standard 00 and licensed to bear the AMCA seal. 9. Louver shall be hinged for service and filter access on all 00% outside air units. 0.0 FILTER SECTION 0. Flat filter rack shall be designed for " thick filters of size and quantity as shown on drawings. Filter rack shall be of the front access type. Filters shall be mounted in galvanized steel frames. 0. Filter media shall be nominal " thick, Merv disposable type design. All filters shall be listed by Underwriters Laboratories as Class..0 GAS FIRED HEATING SECTION (OPTIONAL). The gas fired duct furnace shall be ETL listed for safe and efficient performance. The duct furnace shall be suitable for operation on natural gas or L.P.