M3 Series Modular Indoor and Outdoor Air Handling Units Installation, Operation & Maintenance WARNING QUALIFIED INSTALLER Improper installation, adjustment, 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. A copy of this IOM should be kept with the unit.
Table of Contents Safety .............................................................................................................................................. 7 Unit Orientation ............................................................................................................................ 12 Model Number Nomenclature ...................................................................................................... 13 Base Model Feature Description ..................................
Routine Maintenance................................................................................................................. 60 Blower Assembly ...................................................................................................................... 60 Coils/Drain Pans ........................................................................................................................ 60 Winterizing Coils ...............................................................................
Index of Tables and Figures Tables: Table 1 - Draw-Through Drain Trap Dimensions ........................................................................ 47 Table 2 - Blow-Through Drain Trap Dimensions......................................................................... 51 Table 3 - Flat Pleated Filters ......................................................................................................... 64 Table 4 - Angled Pleated Filters ............................................................
Figure 34 - Blower Rotation ......................................................................................................... 59 Figure 35 - Coil Removal ............................................................................................................. 62 Figure 36 - Access Door/Panel Removal ...................................................................................... 62 Figure 37 - Access Door .....................................................................................
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.
WARNING During installation, testing, servicing and troubleshooting of the equipment it may be necessary to work with live electrical components. Only a qualified licensed electrician or individual properly trained in handling live electrical components shall perform these tasks. Standard NFPA-70E, an OSHA regulation requiring an Arc Flash Boundary to be field established and marked for identification of where appropriate Personal Protective Equipment (PPE) be worn, should be followed.
CAUTION Rotation must be checked on all MOTORS AND COMPRESSORS of 3 phase units at startup by a qualified service technician. Scroll compressors are directional and can be damaged if rotated in the wrong direction. Compressor rotation must be checked using suction and discharge gauges. Fan motor rotation should be checked for proper operation.
WARNING Some chemical coil cleaning compounds are caustic or toxic. Use these substances only in accordance with the manufacturer’s usage instructions. Failure to follow instructions may result in equipment damage, injury or death. CAUTION Door compartments containing hazardous voltage or rotating parts are equipped with door latches to allow locks. Door latch are shipped with nut and bolts requiring tooled access.
WARNING HOT PARTS Disconnect all power, close all isolation valves and allow equipment to cool before servicing equipment to prevent serious injury. Equipment may have multiple power supplies. Electric resistance heating elements and hot water or steam heating coils may have automatic starts. Hot water will circulate even after power is off. 1. Startup and service must be performed by a Factory Trained Service Technician. 2. The unit is for indoor or outdoor use.
Unit Orientation Determine left hand or right hand orientation (connections): M3 Series Top View Right Hand Side Supply Air Return Air AIR FLOW Supply Fan Connections & service access on left side for left hand orientation Coil Filter Left Hand Side Consider the air flow to be hitting the back of your head.
Model Number Nomenclature Base Model Number Individual Module Model Numbers Identifies the main unit features and options. Identifies module configurations, features, and options.
TYPE BASE RAIL COROSSION PROTECTION ACCESSORIES WIRING ASSEMBLY VOLTAGE CROSS SECTION UNIT SIZE UNIT TYPE GEN M3 Series Base Feature String Nomenclature M3 - 0 - 060 - 108 x 099 - 3 - B - A - B - C - B - 0 Base Model Feature Description BASE MODEL Series and Generation M3 Type 0 = Indoor Unit A = Outdoor Unit Unit Size 032 = 32 ft2 Coil 039 = 39 ft2 Coil 045 = 45 ft2 Coil 054 = 54 ft2 Coil 060 = 60 ft2 Coil 067 = 67 ft2 Coil 074 = 74 ft2 Coil 083 = 83 ft2 Coil 094 = 94 ft2 Coil Cross Section 09
SFA - 000 - 0 - 0 0 - C SUPPLY FAN MODULE Module ID SFA = Supply Fan SFB = Supply Fan with Flat Filter Bank SFC = Supply Fan with External Control Panel SFD = Supply Fan with Flat Filter Bank and External Control Panel Position ### = Level and Position of Module in Air Handling Unit Connections 0 = No End Wall B = Air Leaving Side End Wall CONTROLS Type 0 = No Wiring A = Terminal Strip, Branch Fusing B = VAV Controller, Motor Starters, Branch Fusing C = CAV Controller, Motor Starters, Branch Fusing D = MUA
SFA - 000 - 0 - 0 0 - C Blower 0 = 24” Diameter A = 27” Diameter B = 30” Diameter C = 33” Diameter D = 36.5” Diameter E = 42.
SFA - 000 - 0 - 0 0 - C Module Accessories 0 = None A = Treadplate Floor B = Base Drain C = Marine Light D = Door Window F = Options A + B G = Options A + C H = Options A + D J = Options B + C K = Options B + D L = Options C + D P = Options A + B + C Q = Options A + B + D R = Options A + C + D S = Options B + C + D U = Options A + B + C + D P HG A -A C B 0 TYPE ACCESS MODULE ACCESSORY CTRL PANEL POWER SWITCH FILT ACCESSORY FILT TYPE BLWR ISOLATION BLOWER BLWR HP BLWR TYPE BLWR QUANTITY CTRL M
TYPE ACCESS MODULE ACCESSORY COATING TYPE FPI PREHEAT ROWS ACCESSORIES COATING CKTING FPI COOLING ROWS BLANK BLANK AIRFLOW POSITION MODULE ID Cooling/Preheat Coil Module Feature String Nomenclature CLD - 000 - A - 0 0 - A A 0 0 A - C A C 0 G - B - 0 Cooling/Preheat Module Feature Description COOLING/PREHEAT MODULE Module ID CLA = Chilled Water Coils, External Connection, Standard Drain Pan (30.5”) CLC = Chilled Water Coils, Hydronic Preheat, External Connection, Standard Drain Pan (30.
TYPE ACCESS MODULE ACCESSORY COATING TYPE FPI PREHEAT ROWS ACCESSORIES COATING CKTING FPI COOLING ROWS BLANK BLANK AIRFLOW POSITION MODULE ID Cooling/Preheat Coil Module Feature String Nomenclature CLD - 000 - A - 0 0 - A A 0 0 A - C A C 0 G - B - 0 Circuiting 0 = Full Serpentine A = Half Serpentine B = 1 1/2 Serpentine C = Double Serpentine D = DX Single Systems E = DX Two Interlaced Systems Coating 0 = Galvanized Coil Casings A = Polymer E-Coated Coils B = Stainless Steel Coil Casings C
TYPE ACCESS MODULE ACCESSORY COATING TYPE FPI PREHEAT ROWS ACCESSORIES COATING CKTING FPI COOLING ROWS BLANK BLANK AIRFLOW POSITION MODULE ID Cooling/Preheat Coil Module Feature String Nomenclature CLD - 000 - A - 0 0 - A A 0 0 A - C A C 0 G - B - 0 Preheat Coil Type 0 = No Preheat Coil A = Hot Water, Full Serpentine (2 Rows Only) B = Hot Water, Half Serpentine C = Hot Water, Quarter Serpentine D = Steam Distributing Coating 0 = No Preheat Coil A = Galvanized Coil Casing B = Polymer E-Coat
TYPE ACCESS MODULE ACCESSORY BLANK BLANK BLANK BLANK COATING TYPE FPI ROWS HEAT COIL SIZE STAGING ELEC HEAT CAPACITY AIRFLOW POSITION MODULE ID Heating Coil Module Feature String Nomenclature HCD - 000 - A - H E - B B C A A - 0 0 0 0 0 - B - 0 Heating Coil Module Description HEATING COIL MODULE Module ID HCA = Hot Water Coil, External Connections HCB = Steam Coil, External Connections HCC = Electric Heat HCD = Hot Water Coil with Internal Face and Bypass Dampers HCE = Hot Water Coil with
TYPE ACCESS MODULE ACCESSORY BLANK BLANK BLANK BLANK COATING TYPE FPI ROWS HEAT COIL SIZE STAGING ELEC HEAT CAPACITY AIRFLOW POSITION MODULE ID Heating Coil Module Feature String Nomenclature HCD - 000 - A - H E - B B C A A - 0 0 0 0 0 - B - 0 FPI 0 = No Heating Coil A = 8 FPI, 0.0060” Fin Thick, 0.017” Tube Wall B = 10 FPI, 0.0060” Fin Thick, 0.017” Tube Wall C = 12 FPI, 0.0060” Fin Thick, 0.017” Tube Wall D = 8 FPI, 0.0075” Fin Thick, 0.017” Tube Wall E = 10 FPI, 0.0075” Fin Thick, 0.
TYPE ACCESS MODULE ACCESSORY BLANK BLANK BLANK BLANK BLANK BLANK BLANK BLANK DRAIN PAN BLANK BLANK AIRFLOW POSITION MODULE ID Blank Module Feature String Nomenclature BMC - 000 - A - 0 0 - 0 0 0 0 0 - 0 0 0 0 Q - B - 0 Blank Module Feature Description BLANK MODULE Module ID BMA = 2’ Access Section BMB = 2.
FMA - 000 - 0 - 0 0 - A B Filter Module Feature Description FILTER MODULE Module ID FMA = Flat Filter Bank FMB = Angle Filter Bank FMC = Flat Cartridge Filter Bank FMD = Staggered Cartridge Filter Bank FME = Bag Filter Bank FMF = HEPA Filter Bank Position ### = Level and Position of Module in Air Handling Unit Blank 0 = Standard Blank 00 = Standard Pre-filter 0 = None A = 2” Pleated, 30% Eff, MERV 8 B = 4” Pleated, 30% Eff, MERV 8 Final Filter 0 = None A = 4” Cartridge Filter B = 12” Cartridge Filter C = 3
MBA - 000 - 0 - 0 0 - B B C A Mixing Box/Economizer Module Feature Description MIXING BOX/ECONOMIZER MODULE Module ID MBA = Mixing Box (RA & OA Openings) MBB = Mixing Box, Flat Filter Bank MBC = Economizer Box (RA, EA, & OA Openings) MBD = Economizer Box, Flat Filter Bank Position ### = Level and Position of Module in Air Handling Unit Connections 0 = No End Wall A = Air Entering End Wall Blank 00 = Standard Outside Air Location 0 = None A = End B = Bottom C = Left D = Right E = Top F = End, Dampers G = Bo
MBA - 000 - 0 - 0 0 - B B C A Module Accessories 0 = None A = Treadplate Floor B = Base Drain C = Marine Light D = Door Window F = Options A + B G = Options A + C H = Options A + D J = Options B + C K = Options B + D L = Options C + D P = Options A + B + C Q = Options A + B + D R = Options A + C + D S = Options B + C + D U = Options A + B + C + D Access 0 = Left Door, No Drain A = Right Door, No Drain B = Left and Right Doors, No Drain C = Left Door, Left Drain D = Left Door, Right Drain E = Left Door, Both
DPA - 000 - 0 - A A - B Discharge Module Feature Description DISCHARGE MODULE Module ID DPA = Discharge Plenum DPB = Discharge Plenum with Control Panel Position ### = Level and Position of Module in Air Handling Unit Connections 0 = No End Wall A = Air Leaving Side End Wall CONTROLS Controls Type 0 = No Wiring A = Terminal Strip, Branch Fusing B = VAV Controller, Motor Starters, Branch Fusing C = CAV Controller, Motor Starters, Branch Fusing D = MUA Controller, Motor Starters, Branch Fusing Controls Manuf
DPA - 000 - 0 - A A - B Access 0 = Left Door, No Drain A = Right Door, No Drain B = Both Doors, No Drain C = Left Door, Left Drain D = Left Door, Right Drain E = Left Door, Both Drains F = Right Door, Left Drain G = Right Door, Right Drain H = Right Door, Both Drains J = Both Doors, Left Drain K = Both Doors, Right Drain L = Both Doors, Both Drains M = No Door, No Drain 28 A TYPE ACCESS MODULE ACCESSORY CTRL PANEL BLANK BLANK BLANK PWR SWITCH BLANK OPENING ACCESSORIES ACTUATOR TYPE DISCH OPEN
TYPE ACCESS MODULE ACCESSORY CTRL PANEL BLANK BLANK BLANK PWR SWITCH BLANK BLANK BLANK BLANK CTRL MANU CTRL TYPE AIRFLOW POSITION MODULE ID Control Panel Module Feature String Nomenclature CMB - 000 - 0 - A A - 0 0 0 0 A - 0 0 0 0 Q - B - 0 Control Panel Module Feature Description CONTROL PANEL MODULE Module ID CMA = 36” Access Selection CMB = 48” Access Selection CMC = 60” Access Selection Position ### = Level and Position of Module in Air Handling Unit Compartment Pressurization 0 = Blo
EFA - 000 - A - A EXHAUST FAN MODULE Module ID EFA = Exhaust Fan EFB = Exhaust Fan for Energy Recovery Wheel Position ### = Level and Position of Module in Air Handling Unit PREHEAT COIL Type 0 = No Preheat A = Hot Water Preheat B = Steam Preheat Size 0 = None A = Preheat Size A B = Preheat Size B C = Preheat Size C D = Preheat Size D BLOWERS AND MOTORS Quantity 0 = 1 Blower with ODP Motor A = 2 Blowers with ODP Motors B = 3 Blowers with ODP Motors C = 4 Blowers with ODP Motors D = 1 Blower with TEFC Moto
EFA - 000 - A - A B - A B BA A -BBE C Blower 0 = 24” Diameter A = 27” Diameter B = 30” Diameter C = 33” Diameter D = 36.5” Diameter E = 42.
HRA - 000 - 0 - A C - 0 0 0 0 0 - G A A A Damper Actuator Type 0 = None A = Standard Damper B = Standard Damper, On/Off Actuator C = Standard Damper, 0-10 VDC Actuator Module Accessories 0 = None A = Treadplate Floor B = Base Drain C = Marine Light D = Door Window F = Options A + B G = Options A + C H = Options A + D J = Options B + C K = Options B + D L = Options C + D P = Options A + B + C Q = Options A + B + D R = Options A + C + D S = Options B + C + D U = Options A + B + C + D 32 TYPE ACCESS MODULE
TYPE ACCESS MODULE ACCESSORY ACTUATOR TYPE ERW ACCESSORY RA LOC RA FILT BLANK BLANK BLANK BLANK BLANK ERW SIZE ERW TYPE & QTY BLANK POSITION MODULE ID Energy Recovery Module Feature String Nomenclature HRA - 000 - 0 - A C - 0 0 0 0 0 - G A A A C - D - 0 Energy Recovery Module Feature Description ENERGY RECOVERY MODULE Module ID HRA = AAONAIRE Energy Recovery Wheel Position ### = Level and Position of Module in Air Handling Unit Blank 0 = Standard Energy Recovery Wheel Type and Quantity 0
HRA - 000 - 0 - A C - 0 0 0 0 0 - G A A A Access 0 = Left Door, Left Drain 1 = Left Door, No Drain 2 = Right Door, No Drain 3 = Both Doors, No Drain B = Left Door, Right Drain D = Left Door, Both Drains F = Right Door, Left Drain H = Right Door, Right Drain K = Right Door, Both Drain M = Both Doors, Left Drain P = Both Doors, Right Drain R = Both Doors, Both Drains 34 TYPE ACCESS MODULE ACCESSORY ACTUATOR TYPE ERW ACCESSORY RA LOC RA FILT BLANK BLANK BLANK BLANK BLANK ERW SIZE ERW TYPE & QTY
RFA - 000 - 0 - 0 0 - C Return Fan Module Feature Description RETURN FAN MODULE Module ID RFA = Return Fan Module Position ### = Level and Position of Module in Air Handling Unit Connections 0 = No End Wall A = Air Entering End Wall Blank 0 = Standard Blank 0 = Standard BLOWERS AND MOTORS Quantity 0 = 1 Blower with ODP Motor A = 2 Blowers with ODP Motors B = 3 Blowers with ODP Motors C = 4 Blowers with ODP Motors D = 1 Blower with TEFC Motor E = 2 Blowers with TEFC Motors F = 3 Blowers with TEFC Motors G =
RFA - 000 - 0 - 0 0 - C Blank 000 = Standard Connection 0 = No End Wall A = Air Entering End Wall Module Accessories 0 = None A = Treadplate Floor B = Base Drain C = Marine Light D = Door Window F = Options A + B G = Options A + C H = Options A + D J = Options B + C K = Options B + D L = Options C + D P = Options A + B + C Q = Options A + B + D R = Options A + C + D S = Options B + C + D U = Options A + B + C + D 36 TYPE ACCESS MODULE ACCESSORY CONNECTION BLANK BLANK BLANK BLWR ISOLATION BLOWER B
General Description M3 Series modular air handling units have been designed to maximize the versatility and range of applications. This manual is intended to be a guide to facilitate the installation, startup, operation, and maintenance of this product. Any conflicting codes or regulations take precedence over the information in this manual. It is important that all installation and service work be performed by qualified professionals.
6. With permission of freight carrier, order parts and/or make repairs. 7. Stay in contact with freight carrier to ensure payment of your claim. Nameplate should be checked to ensure the correct model sizes and voltages have been received to match the job requirements. If repairs must be made to damaged goods, then the factory should be notified before any repair action is taken in order to protect the warranty.
to prevent excess lateral force on the lifting points. Rigging WARNING Check the shipping section weights on the Bill of Lading to be sure they can be lifted safely. Rigging should be adjusted so that all sections are lifted level. All shipping covers should be left in place until ductwork is ready to be connected or shipping sections are ready to be joined. The unit should be lifted using all marked lifting points. Spreader bars should be used to prevent damage to the unit.
The unit tag number will also be displayed on each module, so that each module can be reattached to the correct unit. Figure 5 - Module Location Example Module Assembly The following tools are suggested for equipment assembly: • Power drill with 5/16” socket • Come-along (2) • ½” wrench and socket • Crowbar • Phillips-head screwdriver 40 1. Move the section chosen to be installed first, to the correct position. It is recommended to start with the heaviest section.
Figure 8 - Module Connection Figure 6 - Moving Module with Pipes 4. Pull the two sections together using a come-along attached to the lifting points on the base rail. 2. Remove module shipping covers. Check to make sure neoprene gasket is installed on downstream edge of each section. If any neoprene gasket is damaged or missing it should be repaired with 3/8” thick lowdurometer neoprene.
The following figure displays a top view of the correctly overlapping module sections with integrated splice. Figure 12 - Aligning the Top of a Unit 5. Secure the two sections together with bolts in the holes surrounding the lifting hole in the base rail. Figure 10 - Top View of Module Connection A crow-bar or similar tool can be used through the lifting holes to line up the two sections. Be sure to replace the lifting lugs on either side of the two base rails before bolting together.
7. Pull sections together until exterior skins meet. 9. Attach integrated splice on walls and roof to adjoining section with self-tapping screws (#10 HEX HEAD) Figure 15 - Pulling Sections Together Figure 17 - Attaching Splice 8. After ensuring that the dimensions are correct, fasten sections together with selftapping screws (#10 HEX HEAD) on top angle. 10. Attach corner rail cover with provided .5” #10 flat head screws.
11. Attach the base splice on inside of unit using self-tapping screws (#10 HEX HEAD) 5. Pull one section straight back from the other until all parts have cleared the other section. Note: When re-assembling sections be sure that all gaskets are in place. It is the contractor’s responsibility to seal all fieldsplit sections. Spring Isolator Adjustment AAON M3 Series air handling units are equipped with spring isolators in all blower sections for vibration attenuation.
The isolators can be adjusted by first loosening the locking bolt located on top of the frame. The adjustment bolt located just below the frame is used to set the spring into the operating position. After the isolator is set for operation the locking bolt must be tightened against the frame. Adjust the isolators so that the blower frame is in contact with the gasket on all four sides of the bulkhead. The blower frame should be parallel with the base of the unit.
Figure 22 - Supply Fan Banding Condensate Drains WARNING Condensate drains that are not properly trapped could cause drain pans to overflow possibly resulting in water damage to building. The primary condensate drains must be trapped for proper operation. Draw-through cooling coils will have a negative static pressure in the drain pan area. This will cause an un-trapped drain to back up due to 46 air being pulled up through the condensate drain piping.
Draw-Through Coils Figure 23 - Draw-Through Drain Trap Table 1 - Draw-Through Drain Trap Dimensions Draw-Through Drain Pan Pressure Trap Dimensions Negative Static X X/2 (inches of water) (inch) (inch) -0.50 1.50 0.75 -1.00 2.00 1.00 -1.50 2.50 1.25 -2.00 3.00 1.50 -2.50 3.50 1.75 -3.00 4.00 2.00 -3.50 4.50 2.25 -4.00 5.00 2.50 The X dimension on the draw-through trap should be at least equal to the absolute value of the negative static pressure in the drain pan plus one inch.
Draw-Through P-Trap Example Figure 24 – Draw-Through Drain Pan Connection Locations The unit shown above is a draw-through unit with a mixing box, 12” cartridge filters with 2” pleated pre-filters, hot water preheat coils, chilled water cooling coils, and hot water reheat coils. The static pressure in the drain pan area is found by finding the largest negative static pressure entering the unit, and then subtracting any pressure drops between that point and the drain pan.
static pressure at the return air opening. These values are listed on the Unit Rating Sheet which can be obtained from the AAON sales representative.
The following components should be added: RA Opening 12” Cartridge Filter Pleated Cartridge Filter Cooling Coil Preheat Coil Dirt Allowance Blow-Through Coils 0.28” 0.35” 0.30” 0.45” 0.09” 0.35” These values should be added to the absolute value of 1.5” to get a total of 3.32” static pressure. Note that the heating coil which is downstream of the drain pan and the discharge opening static pressures are not used in the calculation.
Table 2 - Blow-Through Drain Trap Dimensions Blow-Through Drain Pan Pressure Trap Dimension Positive Static Y (inches of water) (inch) 0.5 1.5 1.0 2.0 1.5 2.5 2.0 3.0 2.5 3.5 3.0 4.0 3.5 4.5 4.0 5.0 4.5 5.5 5.0 6.
Blow-Through P-Trap Example Figure 27 - Blow-Through Drain Pan Connection Locations In this case the supply external static pressure is 3”. The only components between the drain pan and the supply-air ductwork are the discharge opening and the heating coil. To find the static pressure in the drain pan, subtract .08” and .15” from 52 the 3” supply air external static pressure. This gives a positive pressure in the drain pan of 2.77”.
Figure 28 - Example Blow-Through AAONEcat32 Rating Sheet 53
The ‘Y’ dimension on the blow-through ptrap should be at least 3.77”, or one inch plus the calculated static pressure in the drain pan. The total p-trap height will need to be 3.77” plus at least .5” and then one pipe diameter. If the outside diameter of the p-trap pipe is 1.5” then the total height of the trap would be 5.77”. A unit with the 6” base rail would have sufficient height to properly trap this example unit without additional accommodations.
not be run in the same conduit as power wiring. Protect the branch circuit in accordance with code requirements. The unit must be electrically grounded in accordance with the National Electric Code, ANSI / NFPA No. 70. In Canada use current C.S.A. Standard C22.1, Canadian Electric Code Part 1. For field wired units, refer to the motor connection diagram on the inside of the motor terminal box for wiring instructions.
through it. Use the following procedure to cut a round hole in a foam panel. 1. Locate the placement of the hole. Be sure that the conduit will not interfere with the operation of any component or prevent access of any door or removable panel. 2. Drill a pilot hole all the way through the foam wall or roof. 3. Using a hole saw cut the hole through the metal on both sides of the foam part. AAON damper blades are connected with interlocking gears.
Duct System Remove duct shipping covers immediately prior to duct connection. A 1 inch tall duct flange is provided around each duct opening. Piping CAUTION All piping design and installation should be performed by qualified professionals. All applicable codes and industry standards should be adhered to.
drains. Remove the two bolts by each coil connection. When replacing the cover, take care not to over-tighten the bolts as this could cause the rivet-nut to come loose. Vents and drains are sealed with half inch plugs. All coils should be piped in a counter-flow arrangement. The water entering connection should be on the air leaving side of the coil. Operation WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life.
• Check for compliance of all codes and special provisions. • Attach all access panels, close all doors. • Ensure that ductwork dampers are open. CAUTION Improper startup procedures could damage unit and possibly void manufacturer’s warranties. Procedures Install any gauges, voltmeter, and ammeter before startup. If any excess sound or vibration occurs during startup, note and determine the cause, and shut off unit immediately to correct.
specialists should be employed to establish actual operating conditions and to configure the air delivery system for optimal performance. Water Balancing A hydronic specialist with a complete working knowledge of water systems, controls, and operation must be employed to properly balance the entire system.
will help prevent dirty coils; however, coils should still be cleaned at least annually by an HVAC professional. The coils should be cleaned using steam, low-pressure water, low-pressure air, or a non-corrosive coil cleaner. WARNING When steam cleaning coils, be sure area on both sides of coil is clear of excess personnel. Take care not to damage fins while cleaning. High pressure water can damage fins.
WARNING Shut off power to unit and wait for fans to stop turning before removing an access panel. To make sure the unit is not pressurized, open door opposite the access panel. Serious injury can result from removing a panel under positive pressure. To remove an access panel, remove bolts from the perimeter. When replacing a panel, make sure that the neoprene gasket on the panel is not damaged. Do not over-tighten the bolts as this could cause the rivet-nuts to come loose.
Figure 37 - Access Door Install the door on the opposite side of the unit by attaching the hinge to the unit. Be sure that the door is centered in the opening. Rubber gasket needs to be applied on the door jamb of the new door side. The door latch parts will need to be removed and replaced on the new door side. Filters Pleated filters install from upstream side of filter rack. Filters are installed in columns. For each column open snap-fasteners and remove first filter.
Unit Size 032 039 045 054 060 067 074 083 094 Unit Size 032 039 045 054 060 067 074 083 094 Unit Size 032 039 045 054 060 067 074 083 094 64 Filter Size 20” x 16” 20” x 16” 20” x 16” 20” x 16” 20” x 16” 20” x 16” 25” x 16” 25” x 20” 25” x 16” Table 3 - Flat Pleated Filters Qty Wide Qty High 4 4 4 5 4 5 5 5 5 6 6 6 5 6 5 5 5 7 Total Qty 16 20 20 25 30 36 30 25 35 Face Area 35.56 ft2 44.44 ft2 44.44 ft2 55.56 ft2 66.67 ft2 80.00 ft2 83.33 ft2 86.81 ft2 97.
Figure 38 - Cartridge/Bag Filter Layout Viewed from Upstream Side. Filters Face Load Into Type 8 Holding Frame.
M3 Series Startup Form Job Name:_______________________________________________ Date:______________ Address:______________________________________________________________________ ______________________________________________________________________________ Model Number:_________________________________________________________________ Serial Number:_____________________________________________ Tag:_______________ Startup Contractor:______________________________________________________________ Address:_
Supply Fan Assembly Alignment Number Check Rotation hp L1 Nameplate Amps________ L2 L3 1 2 3 4 Band Size_____________________ VAV Controls_________________ VFD Frequency________________ Springs Operating Correctly Energy Recovery Wheel Assembly Wheels Spin Freely Number Check Rotation hp L1 FLA ________ L2 L3 1 2 Power Exhaust Fan Assembly Alignment Number Check Rotation hp L1 Nameplate Amps________ L2 L3 1 2 Band Size_____________________ VFD Frequency________________ Springs Operating
Outside Air/Economizer Dampers OA Operation Check Damper Wiring Check Gears Check RA Operation Check Damper Wiring Check Gears Check EA Operation Check Damper Wiring Check Gears Check Damper Actuator Type:__________________________________________________________ Economizer Changeover Type and Operation:_______________________________________ Electric Heating Stages__________ Stage 1 2 3 4 5 6 68 Limit Lockout Amps Aux.
Maintenance Log 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. The responsibility for proper startup, maintenance, and servicing of the equipment falls to the owner and qualified licensed technician. Entry Date Action Taken Name/Tel.
Literature Change History June 2010 Update of the IOM adding PVC and CPVC piping Caution and revising the Module Assembly section. April 2012 Update of the IOM changing the 2” pleated 30% efficient filter from MERV 7 to MERV 8, correcting the Unit Lifting Drawing to show a 60 degree minimum strap angle, adding the electronic startup form, adding the index of tables and figures, and updating the table of contents. March 2014 Updated factory trained service technician text and feature string nomenclature.
AAON 2425 South Yukon Ave. Tulsa, OK 74107-2728 Phone: 918-583-2266 Fax: 918-583-6094 www.aaon.com M3 Series Installation, Operation & Maintenance R57350 · Rev. D · 140307 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. Copyright © AAON, all rights reserved throughout the world.