AAON SB series Installation Operation & Maintenance
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AAON SB series Installation Operation & Maintenance

Vertical self-contained units
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Installation, Operation
WARNING
QUALIFIED INSTALLER
Improper
installation,
alteration, service or maintenance
can
cause
property
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
Vertical Self-Contained Units
& Maintenance
adjustment,
damage,
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 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 QUALIFIED INSTALLER WARNING Improper...

  • Page 3: Table Of Contents

    Table of Contents AAON SB Series Features and Options Introduction ..............6   Safety .............................. 7   SB Series Feature String Nomenclature ..................12   General Information ........................16   Codes and Ordinances ......................16   Receiving Unit .......................... 17  ...
  • Page 4   Figure 2 - SB Series ........................19   Figure 3 - SB Series Unit Orientation ................... 20   Figure 4 - SB Schematic with (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, and (4) Electric Heat (5) Compressor Section ................... 21  ...
  • Page 5 Figure 21 - Segment Installation ....................37   Figure 22 - Belt Replacement ....................... 38   Figure 23 - SB Series Supply Fan ....................39   Figure 24- Typical wiring diagram with EC motor ..............39   Figure 25 - Shows the jumper that is to be removed (jumped between 9 and GS)...... 40  ...

  • 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 should 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 death carbon-monoxide with NEC/CEC, local state poisoning, if combustion products electrical code requirements.
  • Page 9 CAUTION WARNING Failure to properly drain and vent Do not use oxygen, acetylene or air coils when not in use during freezing in place of refrigerant and dry temperature may result in coil and nitrogen for leak testing. A violent equipment damage.
  • Page 10 OPEN LOOP APPLICATIONS damage, injury or death. Failure of the condenser as a result of chemical corrosion is excluded CAUTION from coverage under AAON Inc. warranties and the heat exchanger Door compartments containing manufacturer’s warranties.
  • Page 11 CAUTION 4. READ THE ENTIRE INSTALLATION, OPERATION AND MAINTENANCE PVC (Polyvinyl Chloride) and CPVC MANUAL. OTHER IMPORTANT (Chlorinated Polyvinyl Chloride) are SAFETY PRECAUTIONS vulnerable attack certain PROVIDED THROUGHOUT THIS chemicals. Polyolester (POE) oils MANUAL. used with R-410A other refrigerants, even in trace amounts, 5.

  • Page 12: 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 13 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 - ABC - 0 A 0 - 0 0 0 0 0 0 Y - E 0...
  • Page 14 SB Series Feature String Nomenclature Model Options Unit Feature Options SB - 007 - 3 - 0 - E 7 0 A - 0 0 0 C - 0 A0 0 0 0 0 0 0 Y - 0 0 0 0 - 0 0 0 - A B...
  • Page 15 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 -...

  • Page 16: General Information

    Certification of Cooling Models General Information a. Certified as a commercial central air conditioner with electrically operated SB Series self contained units have been compressors. designed for indoor installation only. Units b. Certified for indoor installation only. are assembled, wired, charged and run- c.

  • Page 17: Receiving Unit

    WARNING without the manufacturer’s consent may void the product warranty. Contact the COMPRESSOR CYCLING AAON Warranty Department for assistance with handling damaged goods, repairs, and 2 MINUTE MINIMUM OFF TIME freight claims: (918) 382-6450. prevent...

  • Page 18: 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-410A 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 19: Installation

    Table 1 - SB Series Clearances Installation Minimum Location Clearance Required AAON equipment has been designed for Access Door Sides 36 inches quick and easy installation. All Other Sides 6 inches Locating the Unit Placement of the unit relative to ductwork,...

  • Page 20: 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 material has been removed from unit.

  • Page 21: Figure 4 - Sb Schematic With (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, And

    Figure 6 - Bar Clamp At each of the pre-drilled holes in the flange, drill 5/16 hex head self-tapping screws to secure the two sections together. Figure 4 - SB Schematic with (1) Exhaust Fan, (2) Energy Recovery, (3) Air Handler, and (4) Electric Heat (5) Compressor Section 2.

  • Page 22: Refrigerant-To-Water Heat Exchanger Water Piping

    Figure 9 - Strap Types Water Piping Condenser water pump, condenser water 4. Connect Power and Control Wiring piping, cooling tower, pressure gauges, SB Series units are equipped with low and strainers, piping insulation high voltage quick connects to connect components of the waterside piping must be wiring from one section to the next.
  • Page 23 AAON warranties and the heat exchanger Open Loop Applications manufacturer warranties. This product contains more WARNING refrigerant-to-water heat exchangers made of cupronickel or copper and is subject to OPEN LOOP APPLICATIONS severe corrosion and failure when exposed to chlorides. Cupronickel refrigerant-to-water heat...

  • Page 24: Table 2 - Glycol Freezing Points

    7°F 9°F freezing in the condenser is excluded from -7°F -6°F coverage under AAON warranties and the -28°F -27°F heat exchanger manufacturer warranties. Water loop piping runs through unheated areas or outside the building should be WARNING insulated.

  • Page 25: Table 3 - Condenser Water Connections

    CAUTION PVC (Polyvinyl Chloride) and CPVC (Chlorinated Polyvinyl Chloride) are Water In vulnerable attack certain chemicals. Polyolester (POE) oils used with R-410A other refrigerants, even in trace amounts, Water Out in a PVC or CPVC piping system will result in stress cracking of the piping and fittings and complete piping system failure.

  • Page 26: Electrical

    Verify the unit nameplate agrees with power fouling. Install a screen strainer with a supply. SB Series units are provided with minimum of 20 Mesh ahead of the single point power wiring connections. condenser inlet to prevent condenser fouling Connection terminations are made to the and internal tube damage.
  • Page 27 Note: Locations for field cut electrical WARNING entries are marked on the unit. Field cut openings must be a minimum of 6 inches Disconnect electrical power away from all components and wiring to sources before servicing the unit. prevent damage due to drilling or cutting. More than one power source may be provided.
  • Page 28 All wiring beyond at the unit power connection. this point has been completed by AAON and cannot be modified without effecting the unit’s agency/safety certification. Wire control signals to the unit’s low...

  • Page 29: Duct Connection

    Control voltage returning from controller circuit must be a minimum of 21 Intake air enters the back of the SB Series VAC. To assure proper wiring use the unit, where the air filters are located.

  • Page 30: Waterside Economizer

    be the same pipe size or larger than the drain the dirt allowance pressure drop for the connection, include a p-trap, and pitch filters to account for the worst-case scenario. downward toward drain. An air break should The height from top of the bottom bend of be used with long runs of condensate lines.

  • Page 31: Heating Coils

    During waterside economizer only mode of Heating Coils operation condenser water flows through the Factory installed one or two row hot water waterside economizer coil with modulating and steam heating coils can be factory valves maintaining supply air temperature mounted. These coils are supplied from a setpoint.

  • Page 32: Initial Mechanical Check And Setup

    It is important that periodic maintenance be performed to help assure trouble free operation. Initial Mechanical Check and Setup Outdoor air intake adjustments should be made according to building ventilation, or local code requirements. After the unit installation is complete, open the cassette access door and determine that the energy wheel rotates freely when turned by hand.

  • Page 33: Routine Maintenance And Handling

    seals. On larger units, the energy recovery controls, then contact your sales wheel may be accessible inside the walk-in representative, or the control manufacturer cabinet. for assistance. A business card or two pieces of paper can WARNING be used as a feeler gauge, (typically each .004”...

  • Page 34: Cleaning

    To clean, gain access to the energy recovery Cleaning wheel and remove segments. Brush foreign The need for periodic cleaning of the energy material from the face of the wheel. Wash recovery wheel will be a function of the segments or small wheels in a 5% operating schedule, climate...

  • Page 35: Wheel Drive Components

    Wheel Drive Components same at each end of the bearing beam, to The wheel drive motor bearings are pre- within 1/4 of an inch (dimension A & B). lubricated and no further lubrication is This amount of racking can be compensated necessary.

  • Page 36: Service

    wheel rotation. Wheel rotates clockwise (as viewed from the pulley side). 4. If wheel has difficulty starting, turn power off and inspect for excessive interference between the wheel surface and each of the four (4) diameter seals. To correct, loosen diameter seal adjusting screws and back adjustable diameter seals away from surface of wheel, apply power to confirm wheel is...

  • Page 37: Figure 20 - Segment Retainer

    downward force while guiding the segment into place. 4. Close and latch each Segment Retainer under Segment Retaining Catch. 5. Slowly rotate the wheel 180º. Install the second segment opposite the first for counterbalance. Rotate the two installed segments 90º to balance the wheel while the third segment is installed.

  • Page 38: Figure 22 - Belt Replacement

    2. Using hexagonal wrench, loosen set screw clockwise direction to determine that wheel in bearing locking collar. Using light rotates freely with slight drag on seals. hammer and drift (in drift pin hole) tap collar in the direction of wheel rotation to 9.

  • Page 39: Startup

    This includes checking of the air flow, the air filters, condenser water flow and refrigerant charge. Supply Fans SB Series units are equipped with direct Figure 24- Typical wiring diagram with EC drive backward curved plenum supply fan motor...

  • Page 40: Filters

    The fan speed can be modulated using the 0- 10 VDC input signal. To check fan output from the factory, the potentiometer can be dialed to 100%. By sending a 5V signal*, for instance, the rpm can be measured and this reading can be converted to cubic feet of air moved by the fan.

  • Page 41: Table 7 - Acceptable Water-Cooled Refrigeration Circuit Values

    Subtract measured liquid line CAUTION temperature from the saturated temperature to determine the liquid sub-cooling. The Clean Air Act of 1990 bans the Compare calculated sub-cooling to the table intentional venting refrigerant below for the appropriate unit type and (CFC’s and HCFC’s) as of July 1, options.

  • Page 42: Freeze Stat Startup

    CAUTION CAUTION Thermal expansion valve must be DO NOT OVERCHARGE! adjusted to approximately 8-15°F of suction superheat. Failure to have Refrigerant overcharging leads to sufficient superheat will damage the excess refrigerant in the condenser compressor and void the warranty. coils resulting in elevated compressor discharge pressure.

  • Page 43: Table 8 - R-410A Refrigerant Temperature-Pressure Chart

    Table 8 - R-410A Refrigerant Temperature-Pressure Chart °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 78.3 134.7 213.7 321.0 463.2 80.0 137.2 217.1 325.6 469.3 81.8 139.7 220.6 330.2 475.4 83.6 142.2 224.1 334.9 481.6 85.4 144.8 227.7 339.6 487.8 87.2...

  • Page 44: Operation

    Operation accomplished by passing steam or hot water through the steam or hot water coil assembly. Unit operations should be controlled with thermostat or unit controller, never at the Maintenance main power supply, except for emergency or complete shutdown of the unit. (See back of the manual for maintenance log.) Packaged DX Cooling Operation and...

  • Page 45: Dx Cooling

    Use of a water stream, such as a garden DX Cooling hose, against a surface loaded coil will drive Set unit controls to cooling mode of the fibers, dirt and salts into the coil. This operation with supply fans on. Check the will make cleaning efforts more difficult.
  • Page 46 Warranty Protection – Step 1 Failure to clean an E-coated coil will void Complete the coil cleaning following these the warranty and may result in reduced steps: efficiency and durability. 1. Ensure that the power to the unit is off and locked out. 2.

  • Page 47: Supply Fans

    the cleaning solution to soak for 5 to middle). Work in sections/panels 10 minutes. ensuring that all areas are covered 9. Using pressurized potable water, and kept wetted. (<100 psi), rinse the coils and 3. Generously soak coils by spraying continue always work...

  • Page 48: Phase And Brownout Protection Module

    Supply Fan Lubrication wiring diagram include in the control All original blower motors and bearings are compartment furnished with factory lubrication. Some applications will require that bearings be re- When the DPM is connected to the line lubricated periodically. The schedule will voltage, it will monitor the line and if depend on the operating duty, temperature everything is within the setup parameters,...
  • Page 49 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;...

  • Page 50: Filter Replacement

    Replace filters with the size indicated on each filter. Arrow on the replacement filters must point towards the blower. Replacement Parts Parts for AAON equipment may be obtained from your local representative https://www.AAON.com/RepSearch. When ordering parts, reference the unit serial number and part number.

  • Page 51: Filter Information

    Filter Information Table 9 - 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 52: Table 12- 3-5 Ton (B Cabinet) Mixing Box Filters

    Table 12- 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” x 24” x 4” Pleated, MERV 13 and (located in the mixing box) Carbon...

  • Page 53: Table 13 - 6-10 Ton (C Cabinet) Mixing Box Filters

    Table 13 - 6-10 ton (C Cabinet) Mixing Box Filters Feature 6A Quantity/Size Type (4) 16” x 20” x 2” 2” Pleated, MERV 8 Pre- (located in the mixing box) Filters Feature 6B Quantity/Size Type Pleated, MERV 11 and Carbon (4) 16”...

  • Page 54: Appendix A - Heat Exchanger Corrosion Resistance

    Appendix 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 55 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 56 SB Series Startup Form Job Name:_______________________________________________ Date:______________ Address:______________________________________________________________________ ______________________________________________________________________________ Model Number:_________________________________________________________________ Serial Number:_____________________________________________ Tag:_______________ Startup Contractor:______________________________________________________________ Address:______________________________________________________________________ _______________________________________________________ Phone:______________ Pre Startup Checklist Installing contractor should verify the following items. 1. Is there any visible shipping damage? 2. Is the unit level? 3.
  • Page 57 Supply Fan Assembly Alignment Check Rotation Nameplate Amps________ Number VAV Controls_________________ Compressors/DX Cooling Check Rotation Head Suction Number Pressure Pressure PSIG PSIG Refrigeration System 1 - Cooling Mode Saturated Line Pressure Sub-cooling Superheat Temperature Temperature Discharge Suction Liquid Refrigeration System 1 - Heating Mode (Heat Pump Only) Saturated Line Pressure...
  • Page 58 Water/Glycol System 1. Has the entire system been flushed and pressure checked? 2. Has the entire system been filled with fluid? 3. Has air been bled from the heat exchangers and piping? 4. Is the glycol the proper type and concentration (N/A if water)? 5.
  • Page 59 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.

  • Page 60: Table 15 - Condenser Water Connections Updated

    Literature Change History November 2012 First Revision, Rev. A, of the SB Series IOM. December 2012 Manual updated with the voltage options corrected, option 1 = 230V/1Φ/60Hz and option 9 = 208V/1Φ/60Hz. Condensing unit only options and ECM driven fan airflow adjustment information added.
  • Page 61 December 2017 Added AAON touchscreen controller option. January 2018 Updated Feature 3 – Energy Recovery Type. January 2019 Updated Figure 11- Water Connections for Water-Source Heat Pumps. Updated E-Coated Coil Cleaning section. Removed Electric Preheat sections.

  • Page 64: (Acp 31227)

    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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