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Installation, Operation
UL-60335
WARNING
QUALIFIED INSTALLER
Improper
installation,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life. Startup and
service must be performed by a
Factory Trained Service Technician
competent in working with flammable
refrigerants. A copy of this IOM must
be kept with the unit.
Vertical Self-Contained Units
& Maintenance
adjustment,
SB Series
WARNING
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
WARNING
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
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Summary of Contents for AAON SB Series
- Page 1 SB Series Vertical Self-Contained Units Installation, Operation & Maintenance UL-60335 WARNING If the information in this manual is not WARNING followed exactly, a fire or explosion may result causing property damage, QUALIFIED INSTALLER personal injury or loss of life. Improper...
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Page 3: Table Of Contents
Table of Contents AAON SB Series Features and Options Introduction..............6 Safety .............................. 7 SB Series Feature String Nomenclature ..................14 General Information ........................18 Codes and Ordinances ......................18 Receiving Unit .......................... 19 Storage ............................19 Direct Expansion (DX) Systems ....................19 Wiring Diagrams ........................ - Page 4 Index of Tables and Figures Tables: Table 1 - SB Series Clearances ..................... 21 Table 2 - Clearances for Coil Pull ....................21 Table 3 - Glycol Concentration Freezing Points (Metric) ............27 Table 4 - Glycol Concentration Freezing Points (Imperial) ............27 Table 5 - Condenser Water Connections ..................
- Page 5 Figure 1 - Lockable Handle ......................19 Figure 2 - SB Series ........................21 Figure 3 - SB Series Unit Orientation ................... 22 Figure 4 - SB Schematic with (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, and (4) Compressor Section ........................
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Page 6: Aaon Sb Series Features And Options Introduction
AAON SB Series Features and Options Introduction Energy Efficiency Installation and Maintenance Direct Drive Backward Curved Plenum Direct Drive Backward Curved Plenum • • Supply Fans Supply Fans 10-100% Variable Capacity Scroll Clogged Filter Switch and Magnehelic • • Compressors... -
Page 7: Safety
Safety Attention must be paid to the following statements: NOTE - Notes are intended to clarify the unit installation, operation and maintenance. CAUTION - Caution statements are given to prevent actions that may result in equipment damage, property damage, or personal injury. WARNING - Warning statements are given to prevent actions that could result in equipment damage, property damage, personal injury or death. - Page 8 WARNING WARNING CARBON MONOXIDE POISONING GROUNDING REQUIRED HAZARD All field installed wiring must be Failure to follow instructions could completed by qualified personnel. result in severe personal injury or Field installed wiring must comply with death carbon-monoxide NEC/CEC, local and state electrical poisoning, if combustion products code requirements.
- Page 9 CAUTION WARNING Failure to properly drain and vent coils Do not use oxygen, acetylene or air in when not in use during freezing place of refrigerant and dry nitrogen temperature may result in coil and for leak testing. A violent explosion equipment damage.
- Page 10 Failure follow OPEN LOOP APPLICATIONS instructions may result in equipment damage, injury or death. Failure of the condenser as a result of chemical corrosion is excluded from coverage under AAON Inc. warranties CAUTION heat exchanger manufacturer’s warranties. Door compartments containing...
- Page 11 These are set by the AAON factory for the protection of these motors/compressors and must WARNING not be adjusted over this factory setpoint or bypassed.
- Page 12 WARNING WARNING Connected ductwork must be free of Do not use torch or other potential potential ignition sources, such as hot ignition source to detect refrigerant surfaces above 700 ºC (1292 ºF) or leaks. Use only electronic detector electrical devices prone to arcing or suitable for the refrigerant, or bubble sparking.
- Page 13 WARNING WARNING Do not use means to accelerate the Do not operate UV-C lamps outside of defrosting process or to clean, other the unit. than those recommended in this manual. 1. Startup and service must be performed by a Factory Trained Service Technician competent with working with flammable WARNING refrigerants.
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Page 14: Sb Series Feature String Nomenclature
SB Series Feature String Nomenclature Model Options Unit Feature Options SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 : 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0 0 0 0 Y - E 0... - Page 15 SB Series Feature String Nomenclature Model Options Unit Feature Options : 0 0 0 0 - 0 0 0 - A SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 0 A 0 - 0 0 0 0 0 0 Y - E 0...
- Page 16 SB Series Feature String Nomenclature Model Options Unit Feature Options B C - 0 A 0 0 0 0 0 0 0 Y - SB - 007 - 3 - 0 - E 7 0 A - 0 0 0...
- Page 17 SB Series Feature String Nomenclature Model Options Unit Feature Options SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 0 0 0 0 - 0 0 0 A B C - 0 A 0 - 0 0 0 0 0 0 Y -...
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Page 18: General Information
Certified with refrigerant R-454B coils. at the factory. Codes and Ordinances WARNING SB Series units have been tested and certified, by ETL, in accordance with CSA Improper installation, adjustment, C22.2 No. 236 and UL-60335-2-40/ Z21.47- alteration, service or maintenance can 2016. -
Page 19: Receiving Unit
Certain equipment alteration, Direct Expansion (DX) Systems repair, and manipulation of equipment without the manufacturer’s consent may void WARNING the product warranty. Contact the AAON Warranty Department for assistance with COMPRESSOR CYCLING handling damaged goods, repairs, and freight claims: (918) 382-6450. -
Page 20: Wiring Diagrams
All water-cooled condenser DX systems are supply, except for emergency or complete factory assembled, leak tested, charged with shutdown of the unit. R-454B refrigerant, and run tested. During the cooling season, if the air flow is All DX systems include evaporator coils, reduced due to dirty air filters or any other liquid line filter dryers, thermal expansion reason, the cooling coils can get too cold... -
Page 21: Installation
Installation Table 1 - SB Series Clearances Minimum AAON equipment has been designed for Location Clearance Required quick and easy installation. Access 91.4 cm (36 inches) Door Sides Locating the Unit All Other 15.2 cm (6 inches) Placement of the unit relative to ductwork,... -
Page 22: Lifting And Handling The Unit
Consider the air flow to be Air Flow hitting the back of your head. Figure 3 - SB Series Unit Orientation Lifting and Handling the Unit Unit Assembly Before lifting unit, be sure that all shipping Although SB Series units are shipped factory material has been removed from unit. -
Page 23: Figure 4 - Sb Schematic With (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, And
Use bar clamps or other non-destructive 1. Identify and Situate Splits a. SB Units can have the following winching device to pull the tops of the ship split sections: modules together tightly. 1. Exhaust Fan 2. Energy Recovery 3. Air Handler 4. -
Page 24: Figure 9 - Strap Types
4. Connect Power and Control Wiring Failure to seal the entries may result SB Series units are equipped with low and in damage to the unit and property. high voltage quick connects to connect wiring from one section to the next. Wire from the unit to external controls and power sources must be provided in the field. -
Page 25: Refrigerant-To-Water Heat Exchanger Water Piping
Failure of the refrigerant-to-water heat exchanger as a result of chemical corrosion is excluded from coverage under AAON Inc. warranties and the heat exchanger manufacturer’s warranties. Do not allow water containing any form of chlorides to enter this heat exchanger. - Page 26 WARNING in the condenser is excluded from coverage under AAON warranties and the heat OPEN LOOP APPLICATIONS exchanger manufacturer warranties. Cupronickel refrigerant-to-water heat WARNING exchangers must be used with all open loop applications. Failure to use...
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Page 27: Table 3 - Glycol Concentration Freezing Points (Metric)
Table 3 - Glycol Concentration Freezing WARNING Points (Metric) % Glycol Ethylene Propylene WATER PRESSURE Glycol Glycol Prior to connection of condensing -7.8°C -7.2°C water supply, verify water pressure is -13.9°C -12.8°C less than maximum pressure of -21.7°C -21.1°C 2068.4 kpa (300 psi). To prevent -33.3°C -32.8°C injury or death due to instantaneous... -
Page 28: Table 6 - Water Connection Locations
Condenser water pump must be field sized CAUTION and installed between the cooling tower or geothermal wellfield and self-contained unit. Water system components must be Size system in accordance with the ASHRAE Handbook. Use engineering guidelines to properly sized and correctly installed by a qualified technician. -
Page 29: Electrical
corrosion. Never use hydrochloric acid pressure drops poor throttling (muriatic acid) or chlorine as it will corrode characterisics. stainless steel. Pressure temperature ports Water loop piping runs through unheated recommended in condenser water supply and areas or outside the building must be return lines for system balancing. -
Page 30: Figure 13 - Electrical Connection
connection between the units. High voltage conductors must enter the control panel in a separate opening and separate conduit than Electrical connection 24V low voltage conductors. must be field cut and can be located on this panel. WARNING foam insulation releases dangerous fumes when it is burnt. - Page 31 Wire power leads to the unit’s terminal block CAUTION or main disconnect. All wiring beyond this point has been completed by AAON and A qualified technician must ensure cannot be modified without effecting the proper sealing of the electrical and unit’s agency/safety certification.
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Page 32: Table 8 - Control Wiring
amperage listed on the motor nameplate is Table 8 - Control Wiring not exceeded. Wire Size (Stranded) Total Wire Distance - Copper Conductors Allowable Only CAUTION 20 AWG 60.96 m 200 ft 18 AWG 106.7 m 350 ft Rotation must be checked on all 16 AWG 152.4 m 500 ft... -
Page 33: Duct Connection
(1”) MPT fitting. responsible for sealing ducts to the flanges to prevent water leaks. Intake air enters the back of the SB Series unit, where the air filters are located. Size ductwork in accordance with the ASHRAE Handbook. Ductwork must be installed in accordance with NFPA Standard 90A. -
Page 34: Waterside Economizer
duct static pressure. Include the dirt of the evaporator coil. Factory tested and allowance pressure drop for the filters to field installed water piping kit includes fully account for the worst-case scenario. modulating waterside economizer valve and fully modulating waterside economizer The height from top of the bottom bend of the bypass valve. -
Page 35: Heating Coils
Field provided and installed water treatment WARNING program must be compatible with stainless steel, copper, aluminum, ABS plastic, and Piping shall be in accordance with PVC. Batch feed processes must never be national and local codes. Pressure used as concentrated chemicals can cause limiting devices, backflow preventers corrosion. -
Page 36: Figure 15 - Energy Recovery Wheel
outdoor air supply streams where they transfer heat and/or water vapor from the warm, moist air stream to the cooler and/or drier air stream. The initial setup and servicing of the energy recovery wheel is very important to maintain proper operation efficiency and building occupant comfort. -
Page 37: Figure 16 - Cross Section Of Air Seal Structure
channels and slide the seals plates away from Air Seal Adjustments Pile type air seals across both sides of the the wheel. Using the paper feeler gauge, energy wheel diameter are factory adjusted to readjust and retighten one seal plate at a time provide close clearance between the air seal to provide slip fit clearance when the wheel and wheel. -
Page 38: Figure 17 - Lifting Hole Locations
4. Turn the wheel by hand clockwise Controls (when viewed from pulley side) to variety controls electrical check for interference. accessories may be provided with the equipment. Identify the controls on each unit Check Purge Seal by consulting appropriate submittal, or order If a purge is installed, check for a slight documents, and operate according to the interference fit between the seal and the face... - Page 39 Class contaminant Routine maintenance of the Energy Recovery concentration with inoffensive odor and Cassettes includes periodic cleaning of the sensory irritation intensity. Energy Recovery Wheel as well as inspection Class 2 air has moderate contaminant of the Air Seals and Wheel Drive concentration, with mildly offensive odors or Components as follows: sensory-irritation intensity.
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Page 40: Figure 18 - Diameter Seal Adjustment
adsorb and desorb moisture and also build up for better cleaning action. Rinse dirty so as to reduce airflow. solution from segment and remove excess water before reinstalling in wheel. In a reasonably clean indoor environment such as a school or office building, Air Seals measurable reductions of airflow or loss of Four adjustable diameter seals are provided... -
Page 41: Figure 19 - Avoid Racking Of Cassette Frame
The wheel drive pulley is secured to the drive If greater than .64cm (1/4 of an inch) motor shaft by a combination of either a key (dimension C), racking must be corrected to or D slot and set screw. ensure that drive belt will not disengage from wheel. -
Page 42: Figure 20 - Diameter Seal Adjustment
diameter seal adjusting screws and back Service adjustable diameter seals away from surface CAUTION of wheel, apply power to confirm wheel is free to rotate, then re-adjust and tighten hub and diameter seals, as shown in hub seal Disconnect electrical power before adjustment diagram. -
Page 43: Figure 23 - Segment Installation
4. While supporting weight of drive motor in one hand, loosen and remove (4) mounting bolts. 5. Install replacement motor with hardware kit supplied. 6. Install pulley to dimension as shown and secure set screw to drive shaft. 7. Stretch belt over pulley and engage in groove. -
Page 44: Startup
CAUTION Protect hands and belt from possible sharp edges of hole in Bearing Support Beam. 5. Loop the trailing end of the belt over the shaft (belt is partially through the opening). 6. Reinstall the bearing onto the wheel shaft, being careful to engage the two locating pins into the holes in the bearing support beam. -
Page 45: Supply Fans
Supply Fans SB Series units are equipped with direct drive backward curved plenum supply assemblies that deliver the air volume specified according to unit size and job requirements. Fan Air Flow Adjustment A specific air volume is delivered by the fans... -
Page 46: Adjusting Refrigerant Charge
without filters will result in a clogged evaporator coil. The type of unit and options determine the ranges for liquid sub-cooling and evaporator superheat. Refer to the tables below when CAUTION determining the proper sub-cooling. Before completing startup and leaving Checking Liquid Sub-Cooling the unit a complete operating cycle Measure the temperature of the liquid line as... -
Page 47: Freeze Stat Startup
fully loaded (low loads on the evaporator CAUTION result in increased sub-cooling) and the evaporator superheat within DO NOT OVERCHARGE! temperature range as shown in the table above (high superheat results in increased Refrigerant overcharging leads to sub-cooling). excess refrigerant in the condenser coils resulting in elevated compressor Correct an overcharged system by reducing discharge... -
Page 48: Table 16 - Minimum Airflow And Room Areas
Table 16 – Minimum Airflow and Room Areas Minimum Room Area in m Charge of Min Circulation Floor area for 1.8 m (6 ft) 3 m (10 ft) 3.7 m (12 ft) Largest Circuit in Airflow in unventilated ceiling/release ceiling/release ceiling/release kg (oz) /hr (CFM) -
Page 49: Table 17 - Minimum Airflow And Room Areas (Continued)
Table 17 – Minimum Airflow and Room Areas (continued) Minimum Room Area in m Charge of Min Circulation Floor area for 1.8 m (6 ft) 3 m (10 ft) 3.7 m (12 ft) Largest Circuit Airflow in unventilated ceiling/release ceiling/release ceiling/release in kg (oz) /hr (CFM) -
Page 50: Table 18 - R-454Ba Refrigerant Temperature-Pressure Chart (Metric)
Table 18 - R-454BA Refrigerant Temperature-Pressure Chart (Metric) °C °C °C °C °C 1348.0 38.3 2034.6 -6.7 484.5 843.3 23.3 53.3 2946.9 1370.0 38.9 2064.1 -6.1 495.6 859.3 23.9 53.9 2985.7 1392.2 39.4 2093.9 -5.6 506.9 875.3 24.4 54.4 3024.9 1414.6 40.0 2123.9 55.0 -5.0... -
Page 51: Table 19 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)
Table 19 - R-454B Refrigerant Temperature-Pressure Chart (Imperial) °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 427.4 70.3 122.3 195.5 295.1 433.0 71.9 124.6 198.7 299.4 73.5 127.0 201.9 303.7 438.7 75.2 129.3 205.2 308.0 444.5 76.8 131.7 208.5 312.5 450.3... -
Page 52: Operation
Operation Packaged DX Cooling Operation and Control When a call for cooling is made the supply Unit operations must be controlled with fan motors and compressors will energize. thermostat or unit controller, never at the main power supply, except for emergency or complete shutdown of the unit. -
Page 53: Refrigerant Removal And Evacuation
fans, evaporator coils and air filters must be All maintenance staff and others working in inspected monthly. the area are to be instructed on the nature of work being performed. Care should be taken to ensure that working in a confined space is WARNING avoided. -
Page 54: Dx Cooling
The system must be purged with oxygen-free Maintenance Record sheet is provided in this nitrogen to render the appliance safe for document. flammable refrigerant. Compressed air or oxygen must not be used. When pulling a WARNING vacuum, ensure that the outlet of the vacuum pump is not near any potential ignition source Electric shock hazard. - Page 55 CAUTION soot, greasy residue, lint, and other particulate: High velocity water from a pressure Enviro-Coil Cleaner: AAON PN: V82540 washer or compressed air must only be used at a very low pressure to GulfClean ™ Coil Cleaner: prevent fin and/or coil damages. The...
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Page 56: Supply Fans
Rinse - Using pressurized potable water such Bearings must be re-lubricated when at normal operating temperatures, but not as a garden hose, (< 689.5 kpa [100 psi]), running. Rotate the fan shaft by hand and add rinse the coils and continue to always work only enough grease to purge the seals. -
Page 57: Phase And Brownout Protection Module
Phase and Brownout Protection Module To change the setpoint parameters use the right arrow key to advance forward through the setpoint parameters and the left arrow to backup if needed. When each parameter is displayed use the up/down keys to change and set the parameter. - Page 58 Screens Manufacturer’s Screen R-K Electronics DPM v0.0.00 Average Voltage Screen VAvg Default – the default screen shows the real time voltage detected in each of the 3 phases: A-B B-C C-A Voltage Selection Screen (Vertical Format) Default = 460V, 3Ø 200, 1Ø;...
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Page 59: Filter Information
Filter Information Table 20 - 3-5 ton (B Cabinet) Pre and Unit Filters Feature 6A Quantity/Size Type No Pre Filters (1) 24” x 24” x 2” Pleated, MERV 8 Feature 6B Quantity/Size Type No Standard Filters (1) 24” x 24” x 2” Pleated, MERV 8 Pleated, MERV 8 Pleated, MERV 11... -
Page 60: Table 23 - 3-5 Ton (B Cabinet) Mixing Box Filters
Table 23 - 3-5 ton (B Cabinet) Mixing Box Filters Feature 6A Quantity/Size Type (1) 24” x 24” x 2” 2” Pleated, MERV 8 Pre- (located in the mixing box) Filters Feature 6B Quantity/Size Type Pleated, MERV 11 and Carbon (1) 24”... -
Page 61: Table 25 - 14-18 Ton (D Cabinet) Mixing Box Filters
(located in the unit) Pleated, MERV 13 Pleated, MERV 11 and Pleated, MERV 14 Replacement Parts Filter Converstion Table Parts for AAON equipment may be obtained Inches Centimeters from your local AAON representative. [16 x 20 x 2] [40.6 x 50.8 x 5.1]... -
Page 64: Apendix A - Heat Exchanger Corrosion Resistance
Apendix A - Heat Exchanger Corrosion Resistance The resistance guide below provides the corrosion resistance of stainless steel type AISI 316 and pure Copper (99.9%) in water, to a number of important chemical factors. The actual corrosion is a very complex process influenced by many different factors in combination. Explanations: + Good resistance under normal conditions 0 Corrosion problems may occur especially when more factors are valued 0 - Use is not recommended... - Page 65 Water Concentration Time Limits - AISI Copper Nickel Containing (mg/l or ppm) Analyze Before Alloy Alloy Total Hardness 4.0-8.5 No Limit (°dH) < 100 Nitrate (NO No Limit > 100 < 0.2 Iron (Fe) No Limit > 0.2 < 0.2 Aluminum (Al) No Limit >...
- Page 66 SB Series Startup Form Job Name:________________________________________________ Date:____________ Address:____________________________________________________________________ ____________________________________________________________________________ Model Number:_______________________________________________________________ Serial Number:______________________________________________ Tag:___________ Startup Contractor:____________________________________________________________ Address:____________________________________________________________________ _____________________________________________________ Phone:___________ Pre Startup Checklist Installing contractor must verify the following items. 1. Is there any visible shipping damage? 2. Is the unit level? 3.
- Page 67 17. Are ventilation and exhaust openings unobstructed? 18. Are markings, decals, and warnings on unit clearly visible? 19. Are all damaged or illegible markings and warnings replaced? Ambient Temperature Ambient Dry Bulb Temperature ______°C/°F Ambient Wet Bulb Temperature _____°C/°F Voltage L1-L2 L2-L3 L1-L3...
- Page 68 Unit Configuration Water-Cooled Condenser No Water Leaks Condenser Safety Check Water Flow ________ gpm Water Inlet Temperature ________°C/°F Water Outlet Temperature ________°C/°F Water/Glycol System 1. Has the entire system been flushed and pressure checked? 2. Has the entire system been filled with fluid? 3.
- Page 69 This log must be kept with the unit. It is the responsibility of the owner and/or maintenance/service contractor to document any service, repair or adjustments. AAON Service and Warranty Departments are available to advise and provide phone help for proper operation and replacement parts.
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Page 70: Maintenance Log (E-Coated Coil)
Maintenance Log (E-Coated Coil) - Page 71 Added E = 1 Blower + Perm Magnet AC TEFC Motor + VFD option to Feature 5A. November 2023 Start of new UL 60335 version of SB series IOM Rev. A. Added New UL 60335 tables and standard. Added 35 and 65 KAIC tables. Add Min and Max Water temps and pressures table.
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Page 72: (Lv J000301)
Parts: For replacement parts please contact your local AAON Representative. It is the intent of AAON to provide accurate and current product information. However, in the interest of product improvement, AAON reserves the right to change pricing, specifications, and/or design of its product without notice, obligation, or liability.
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