M2_IOM_240828_410A.pdf

Modular Indoor Air Handling Units & Self-Contained Units

Installation, Operation & Maintenance

Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electrical switch;

do not use any phone in your building.

Leave the building immediately.

Immediately call you gas supplier from a phone remote from the building. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier call the fire department.

Startup and service must be performed by a Factory Trained Service Technician.

M2 Series

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in serious injury, death or property damage.

Be sure to read and understand the installation, operation and service instructions in this manual.

Improper installation, adjustment, alteration, service or maintenance can cause serious injury, death or property damage.

A copy of this IOM should be kept with the unit.

UL-1995

Table of Contents Safety Feature String Nomenclature

M2 Series Base Feature String Nomenclature Fan Module Description Filter Module Description Mixing Module Description Heat Module Description Blank Module Description Coil Module Description Controls Module Description Energy Recovery Module Description Water-Source Heat Pump Module Description

Unit Orientation General Information

Codes and Ordinances Receiving Unit Storage Direct Expansion (DX) Units Gas or Electric Heating Wiring Diagrams Condensate Drain Pan

Installation Locating Units Lifting the Assembled Unit Lifting the Individual Modules Floor Mounted Units Module Assembly Evaporator Coils Hot Gas Reheat Hot Gas Bypass Refrigerant-to-Water Heat Exchanger

Open Loop Applications Freezing Water in the Heat Exchanger Water Piping Heat Exchanger Safeties

Waterside Economizer Heating Coils Chilled Water Coils Condensate Drain Piping Blower Wheels

Electrically Commutated Motor (ECM) Air Adjustment Banded Wheel Air Adjustment

Electric Heating Electrical

Cutting Electrical Openings

Fuses and Circuit Breakers Thermostat Control Wiring

Gas Fired Furnace Unit Location and Clearances Gas Supply, Piping and Connections Gas Furnace Component Identification General Venting Vertically Vented Horizontally Vented Two-Pipe Separated Combustion Venting

Energy Recovery Units Initial Mechanical Check and Setup Routine Maintenance and Handling Cleaning Wheel Drive Components Startup Procedure Service

Startup Filters Check Out Gas Heater

Operating and Safety Instructions Gas Heater Start-up Gas Heater Shut Down

Commissioning Operation Adjusting Refrigerant Charge Refrigeration Troubleshooting

Maintenance Fan Assembly Bearings Belts Indoor Coils Refrigeration Cycle Brazed Plate Heat Exchanger Cleaning E-Coated Coil Cleaning Gas Furnace Electric Heating Steam or Hot Water Heating Cleaning Chilled Water DX Water Source Cooling Condensate Drain Pans Lubrication Phase and Brownout Protection Module Replacement Parts

AAON Technical Support Filter Replacement Decommissioning

Appendix A - Heat Exchanger Corrosion Resistance Split System Piping Diagrams M2 Series Startup Form Maintenance Log Literature Change History

Index of Tables and Figures Tables:

Table 1 – Electric and Gas Heating Capacities Table 2 - Minimum Clearances Table 3 - Glycol Freezing Points Table 4 - Standard Water-Source Connections Table 5 – Steam Distributing Coil Sweat Connection Sizes (OD) Table 6 – Hot Water Coil Sweat Connection Sizes (OD) Table 7 – Chilled Water Coil Sweat Connection Sizes (OD) Table 8 – Draw-Through and Blow-Through Drain Trap Dimensions (Metric) Table 9 – Draw-Through and Blow-Through Drain Trap Dimensions (Imperial) Table 10 - Nameplate Voltage Markings Table 11 – 35 KAIC Fuse Sizing Table 12 – 65 KAIC Fuse Sizing Table 13 - Control Wiring Table 14 – Gas Inlet Pressure (Metric) Table 15 – Gas Inlet Pressures (Imperial) Table 16 – Vent Pipe Connection Size Table 17 - Gas Heater Troubleshooting Table 18 - Acceptable Refrigeration Circuit Values (Metric) Table 19 - Acceptable Refrigeration Circuit Values (Imperial) Table 20 - Acceptable Water-Cooled Refrigeration Circuit Values (Metric) Table 21 - Acceptable Water-Cooled Refrigeration Circuit Values (Imperial) Table 22 - R-410A Refrigerant Temperature-Pressure Chart (Metric) Table 23 - R-410A Refrigerant Temperature-Pressure Chart (Imperial) Table 24 – Refrigeration Problems, Causes, and Solutions Table 25 - Bearing Setscrew Torque Recommendations (Metric) Table 26 - Bearing Setscrew Torque Recommendations (Imperial) Table 27 - Min and Max Water Pressures and Temps Table 28 - Fan Bearing Lubrication Schedule Table 29 - M2-018 Table 30 - M2-026 Filters Table 31 - M2-036 Filters

Figures:

Figure 1 - Typical M2 Series Selection Figure 2 - Unit Orientation Figure 3 - Lockable Handle Figure 4 - Service Access Clearance Figure 5 - M2 Series Unit Four Point Lifting Figure 6 - M2 Series Unit Eight Point Lifting Figure 7 - M2 Series Individual Module Bottom Tier Lifting Figure 8 - M2 Series Individual Module Top Tier Lifting Figure 9 - Module Assembly Schematic Figure 10 - Bolted Base Rail Figure 11 - Bar Clamp Figure 12 - Self-Tapping Screw Figure 13 - Strap Types Figure 14 - Strap Locations Figure 15 - Strap Positioning Figure 16 - Strap Installation Figure 17 - Power and Control Wiring Figure 18 - Quick Connects Figure 19 - TXV Bulb Position Figure 20 - Water-Source Heat Pump Water Piping Figure 21 - Water-Cooled Only Water Piping Figure 22 – Waterside Economizer Piping Figure 23 - Steam Distributing Piping Figure 24 - Hot Water Piping Figure 25 - Chill Water Piping Figure 26 - Draw-Through Drain Trap Figure 27 - Blow-Through Drain Trap Figure 28 – Jumper for Remote Fan Speed Control Figure 29 – Potentiometer Figure 30 - Supply Fan Banding Figure 32 - Sediment Trap for Gas Heat Figure 33 – Gas Heater Component Identification Figure 33 – Indoor Vertical Venting (Category I) Figure 34 – Indoor Horizontal Venting (Category III) Figure 35 – Indoor Vertical Venting Separated Combustion Figure 36 – Indoor Horizontal Venting Separated Combustion Figure 37 - Energy Recovery Wheel Figure 38 - Cross Section of Air Seal Structure Figure 39 - Lifting Hole Locations Figure 40 - Avoid Racking of Cassette Frame Figure 41 - Diameter Seal Adjustment Figure 42 - Hub Seal Adjustment Figure 43 - Segment Retainer Figure 44 - Segment Installation

Figure 45 - Belt Replacement Figure 46 – Combination Gas Valve Figure 47 – 2.2mmHg (1.2” w.c.) Manifold Natural Gas Figure 48 -6.5 mmHg (3.5” w.c.) Manifold Natural Gas Figure 49 - Flame Sensor Current Check Figure 51 - Angular Misalignment Figure 52 - Parallel Misalignment Figure 53 - Belt Deflection Figure 53 - Filter Layout Figure 54 - A/C Split System Piping, Suction Down Figure 55 - A/C Split System Piping, Suction Up Figure 56 - A/C with LAC Split System Piping, Suction Down Figure 57 - A/C with LAC Split System Piping, Suction Up Figure 58 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Down Figure 59 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Up Figure 60 - A/C with Hot Gas Bypass Split System Piping, Suction Down Figure 61 - A/C with Hot Gas Bypass Split System Piping, Suction Up Figure 62 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Down Figure 63 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Up Figure 64 - Heat Pump Split System Piping, Suction Down Figure 65 - Heat Pump Split System Piping, Suction Up Figure 66 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Down 116 Figure 67 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Up Figure 68 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Down Figure 69 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Up Figure 70 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Down Figure 71 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping, Suction Up

G149590 · Rev. A · 240828

(ACP J000304)

Safety

ELECTRIC SHOCK, FIRE OR

EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous operation, serious injury, death, or property damage.

Before servicing, disconnect all electrical power to the furnace.

More than one disconnect may be provided.

When servicing controls, label all wires prior to disconnecting.

Reconnect wires correctly.

Verify proper operation after servicing. Secure all doors with key-lock or nut and bolt.

WHAT TO DO IF YOU SMELL GAS

Do not try to turn on unit.

Shut off main gas supply.

Do not touch any electric switch.

Do not use any phone in the building.

Leave the building immediately.

Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

CAUTION

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.

DANGER - Danger statements are given to prevent actions that will result in equipment damage, property damage, severe personal injury or death.

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.

Electric shock hazard. Before servicing, shut off all electrical power to the unit, including remote disconnects, to avoid shock hazard or injury from rotating parts. Follow proper Lockout-Tagout procedures.

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.

ROTATING COMPONENTS

Unit contains fans with moving parts that can cause serious injury. Do not open door containing fans until the power to the unit has been disconnected and fan wheel has stopped rotating.

GROUNDING REQUIRED

All field installed wiring must be completed by qualified personnel.

Field installed wiring must comply with NEC/CEC, local and state electrical code requirements. Failure to follow code requirements could result in serious injury or death. Provide proper unit ground in accordance with these code requirements.

FIRE, EXPLOSION OR CARBON

MONOXIDE POISONING HAZARD

Failure to replace proper controls could result in fire, explosion or carbon monoxide poisoning. Failure to follow safety warnings exactly could result in serious injury, death or property damage. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this appliance.

CARBON-MONOXIDE POISONING

HAZARD

Failure to follow instructions could result in severe personal injury or death due to carbon-monoxide poisoning, if combustion products infiltrate into the building.

Check that all openings in the outside wall around the vent (and air intake) pipe(s) are sealed to prevent infiltration of combustion products into the building.

Check that furnace vent (and air intake) terminal(s) are not obstructed in any way during all seasons.

VARIABLE FREQUENCY DRIVES

Do not leave VFDs unattended in hand mode or manual bypass.

Damage to personnel or equipment can occur if left unattended. When in hand mode or manual bypass mode VFDs will not respond to controls or alarms.

Electric motor over-current protection and overload protection may be a function of the Variable Frequency Drive to which the motors are wired.

Never defeat the VFD motor overload feature. The overload ampere setting must not exceed 115% of the electric motors FLA rating as shown on the motor nameplate.

CAUTION

UNIT HANDLING

To prevent injury or death lifting equipment capacity shall exceed unit weight by an adequate safety factor.

Always test-lift unit not more than 61 cm (24 inches) high to verify proper center of gravity lift point to avoid unit damage, injury or death.

Failure to properly drain and vent coils when not in use during freezing temperature may result in coil and equipment damage.

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. Alterations should only be made at the unit power connection

Do not use oxygen, acetylene or air in place of refrigerant and dry nitrogen for leak testing. A violent explosion may result causing injury or death.

This appliance is not intended for use by persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children must be supervised around this appliance.

WATER PRESSURE

Prior to connection of condensing water supply, verify water pressure is less than maximum pressure shown on unit nameplate. To prevent injury or death due to instantaneous release of high pressure water, relief valves should be field supplied on system water piping.

Always use a pressure regulator, valves and gauges to control incoming pressures when pressure testing a system. Excessive pressure may cause line ruptures, equipment damage or an explosion which may result in injury or death.

Do not clean DX refrigerant coils with hot water or steam. The use of hot water or steam on refrigerant coils will cause high pressure inside the coil tubing and damage to the coil.

To prevent damage to the unit, do not use acidic chemical coil cleaners. Do not use alkaline chemical coil cleaners with a pH value greater than 8.5, after mixing, without first using an aluminum corrosion inhibitor in the cleaning solution.

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

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. If you do not replace the shipping hardware with a pad lock always re-install the nut & bolt after closing the door.

Cleaning the cooling tower or the condenser water loop with harsh chemicals, such as hydrochloric acid (muriatic acid) or chlorine, can damage the water-cooled condenser.

Care should be taken to avoid allowing chemicals to enter the water-cooled condenser. See Appendix A - Heat Exchanger Corrosion Resistance for more information.

In order to avoid a hazard due to inadvertent resetting of the THERMAL CUT-OUT, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

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.

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

Do not weld or cut foam panel with plasma cutters or a cutting torch – When burnt the foam produces dangerous fumes.

Do not work in a closed area where refrigerant or nitrogen gases may be leaking. A sufficient quantity of vapors may be present and cause injury or death.

Never attempt to open an access door or remove a panel while the unit is running. Pressure in the unit can cause excessive force against the panel.

OPEN LOOP APPLICATIONS

Failure of the condenser as a result of chemical corrosion is excluded from coverage under AAON Inc. warranties and the heat exchanger manufacturer’s warranties.

WATER FREEZING

Failure of the condenser due to freezing will allow water to enter the refrigerant circuit and will cause extensive damage to the refrigerant circuit components. Any damage to the equipment as a result of water freezing in the condenser is excluded from coverage under AAON warranties and the heat exchanger manufacturer warranties.

1. Startup and service must be performed by a Factory Trained Service Technician.

2. The unit is for indoor use only. See

General Information section for more unit information.

3. Use only with type of the gas approved for the furnace. Refer to the furnace rating plate.

4. Install this furnace only in a location and position as specified in the Installation section of this manual. The gas heat module must be installed on the positive pressure side of the supply fan.

5. Provide adequate combustion ventilation air to the furnace. If a vent duct extension is used, a class III approved vent is required. See the Locating Units and Gas Heating sections of the Installation section of the manual.

6. Combustion products must be discharged to the outdoors. Connect the furnace to an approved vent system. See the General Venting section of this manual.

7. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections.

COMPRESSOR CYCLING

5 MINUTE OFF TIME

To prevent motor overheating, compressors must cycle off for a minimum of 5 minutes.

5 MINUTE ON TIME

To maintain the proper oil level, compressors must cycle on for a

The cycle rate must not exceed 6 starts per hour.

Ensure that sufficient dampers will be open to provide air path before fan is allowed to run.

Units with VFD driven motors/compressors have adjustable overload settings. These are set by the AAON factory for the protection of these motors/compressors and must not be adjusted over this factory setpoint or bypassed.

8. Always install and operate furnace within the intended temperature rise range and duct system external static pressure (ESP) as specified on the unit nameplate.

9. The supply and return air ducts must be derived from the same space. It is recommended ducts be provided with access panels to allow inspection for duct tightness. When a down flow duct is used with electric heat, the exhaust duct should be an L shaped duct.

10. Clean furnace, duct and components upon completion of the construction setup. Verify furnace operating conditions including input rate, temperature rise and ESP.

11. Every unit has a unique equipment nameplate with electrical, operational, and unit clearance specifications. Always refer to the unit nameplate for specific ratings unique to the model you have purchased.

12. READ THE ENTIRE INSTALLATION,

OPERATION AND MAINTENANCE

MANUAL. OTHER IMPORTANT

SAFETY PRECAUTIONS ARE

PROVIDED THROUGHOUT THIS

MANUAL.

13. Keep this manual and all literature safeguarded near or on the unit.

Feature String Nomenclature

Base Feature String Individual Module Feature String Identifies the main unit features and options. Identifies module configurations, features and options.

BBD-101-0-00-00000-00000-0-0

FTH-102-P-C0-20000-CE000-C-X

HRA-103-A-00-00000-00000-0-0

M2-H-026-L-2-A-A-0-C-0 : MBH-104-A-00-00000-0000-0-0

CLC-105-E-00-00000-610I0-S-0

SDB-106-M-EI-C0000-00000-0-0

PHG-107-H-00-00000-C0M0A-0-0

EDB-201-L-GI-C0000-00000-0-0

MBD-203-A-A0-00000-B0000-0-0

Complete Feature String

A complete unit feature string consists of a base model feature string followed by a series of individual module feature strings. The first three letters of the individual module model number identify the type of module (fan, filter, coil, etc). The three numbers after the three letters indicate the position of the module in unit assembly. If the module is on the bottom level, the first number is 1 while the first number in the top level is 2. The last number increases in value from the return/outside air section to the discharge air section. In the below example, the cooling coil module in Figure 1, CLC-105-E-00- 00000-610I0-0-0, is the fifth module on the first level of the unit. The exhaust fan, EDB- 201-L-GI-C000-00000-0-0, is the first module on the second level.

Figure 1 - Typical M2 Series Selection

M2 Series Base Feature String Nomenclature Model Options

G E

N

T Y

PE

U

IT

S

IZ

E

SU

PP

L

A

IR

FL

O W

V

L

T A

G E

A

SS

E M

B

IN

G

PA

T

B A

SE

R

IL

SP

C

IA

M2 - H - 011 - R - 2 - A - A - 0 - C - 0

M2 Series Base Feature String Nomenclature

BASE MODEL DESCRIPTION

Series and Generation M2

Type H = Horizontal

Unit Size 018 = 18 ft2 Coil (3800 – 9800) 026 = 26 ft2 Coil (5200-14800) 036 = 36 ft2 Coil (7000-21000)

Supply Airflow L = Left Hand R = Right Hand

Voltage 2 = 230V/3Φ/60Hz 3 = 460V/3Φ/60Hz 4 = 575V/3Φ/60Hz 8 = 208V/3Φ/60Hz

Assembly A = Factory Assembled B = Individual Boxes

Wiring 0 = No Factory Wiring A = Control Wiring in Fan Box B = Control Wiring in Control Box

Paint 0 = None - Standard A = Indoor Unit with Exterior Corrosion Protection B = Indoor Unit with Interior and Exterior Corrosion Protection E = Shipping Shrink Wrap F = Indoor Unit with Exterior Corrosion Protection + Shipping Shrink Wrap G = Indoor Unit with Interior and Exterior Corrosion Protection + Shipping Shrink Wrap

Base Rail C = 6” High

Special 0 = None X = Special Pricing Authorization

Fan Module Feature String Nomenclature

M

D U

L

ID

PO

SI

T

IO

T

R

Z

E B

L O

W

IS

L A

T

T

B

A

K

PU

LE

Y

S

SA

FE

C

N

T R

O L

B L

A

A

C

IA

SDD - 103 - J - B I - F 00 00 - A 0000 - 0 - 0

Fan Module Description

FAN MODULE DESCRIPTION

Module ID SFA = Belt Driven Supply SFC = Belt Drive Supply, Top Discharge SFD = Belt Driven Supply, No Control Panel SDB = Direct Drive Supply SDD = Direct Drive Supply, Top Discharge SDM = Dual Fan Direct Drive Supply SDN = Dual Fan Direct Drive Supply, Top Discharge PEA = Belt Driven Power Exhaust PEC = Belt Driven Power Exhaust, Top Discharge EDB = Direct Drive Power Exhaust EDD = Direct Drive Power Exhaust, Top Discharge RFA = Belt Driven Power Return RDB = Direct Drive Power Return RDM = Dual Fan Direct Drive Power Return

Position ### = Level and Position of Module in Air Handling Unit

Motor Size E = 1 hp F = 2 hp G = 3 hp H = 5 hp J = 7.5 hp K = 10 hp L = 15 hp M = 20 hp N = 25 hp P = 30 hp Q = 1.0 kW (1.3 hp) S = 1.7 kW (2.3 hp) T = 3.0 kW (4.0 hp) U = 5.4 kW (8.0 hp)

Blower A = 15” Backward Curved Plenum B = 18” Backward Curved Plenum C = 22” Backward Curved Plenum D = 27” Backward Curved Plenum E = 30” Backward Curved Plenum F = 33” Backward Curved Plenum G = 37” Backward Curved Plenum H = 24” Backward Curved Plenum

Blower Continued J = 15” BC Plenum - 50% Width K = 18” BC Plenum - 30% Width L = 2 x 18” Backward Curved Plenum M = 2 x 22” Backward Curved Plenum N = 2 x 24” Backward Curved Plenum P = 2 x 27” Backward Curved Plenum Q = 14” ECM Backward Curved Plenum R = 16” ECM Backward Curved Plenum S = 18” ECM Backward Curved Plenum T = 18” ECM Backward Curved Plenum

Isolation 0 = Standard I = Fan Isolation

Motor Type A = Standard Efficiency 1760 rpm B = Premium Efficiency 1760 rpm C = Premium Eff. 1760 rpm with VFD D = Premium Eff. 1760 rpm with VFD and Bypass E = Premium Efficiency 1170 rpm F = Premium Eff. 1170 rpm with VFD G = EC Motor

Blank 00 = Standard

Pulleys ## = Pulley Combination

Safety Control 0 = None A = Phase & Brownout Protection

Blank 0000 = Standard

Blank 0 = Standard

Special

Filter Module Feature String Nomenclature

O

D U

L

T

FI

TE

TE

R S

SA

FE

N

T R

O L

B L

A

2N D F

IL

2N

F

IL

A

PT

IO

N S

SP

E

C

IA

FTA - 102 - P - A0 - 0 0000 - 0 00 00 - 0 - 0

Filter Module Description

FILTER MODULE DESCRIPTION

Module ID FTA = Small Flat Filter FTC = Cartridge Filter FTE = Medium Flat Filter FTF = Large Flat Filter FTH = Cartridge Filter with Flat Pre-Filter FTK = Extra Large Flat Filter

Position ### = Level and Position of Module in Air Handling Unit

Filter Type P = Pleated C = Cartridge

Filters A0 = 2” Pleated, 30% Eff.

B0 = 4” Pleated, 30% Eff.

C0 = 4” Pleated, 65% Eff. or 12” Cartridge, 65% Eff.

D0 = 4” Pleated, 85% Eff. or 12” Cartridge, 85% Eff.

E0 = 4” Pleated, 95% Eff. or 12” Cartridge, 95% Eff.

Safety Control 0 = Standard 2 = Firestat

Blank 0000 = Standard

Second Filter Type 0 = Standard - None C = Cartridge

Second Filter 00 = Standard - None C0 = 12” Cartridge, 65% Eff.

D0 = 12” Cartridge, 85% Eff.

E0 = 12” Cartridge, 95% Eff.

Blank 00 = Standard

Filter Options 0 = Standard - None A = Magnehelic Gauge B = Clogged Filter Switch C = Magnehelic Gauge & Clogged Filter Switch

Special

Mixing Module Feature String Nomenclature

O

D U

L

T

T U

A T

TE

R S

SA

FE

N

T R

O L

B L

A

SS

N

A

IO

N S

SP

E

C

IA

MBH - 101 - A - 00 - 0 0000 - 0 0000 - 0 - 0

Mixing Module Description

MIXING MODULE DESCRIPTION

Module ID MBA = Vertical Damper MBB = Horizontal Top Damper MBC = Vertical & Horizontal Bottom Damper MBD = Vertical Damper with Filter MBE = Horizontal Top Damper with Filter MBF = Horizontal Bottom Damper MBH = Vertical & Horizontal Top Damper MBI = Horizontal Bottom Damper with Filter MBJ = Vertical & Horizontal Top Damper with Filter MBK = Vertical & Horizontal Bottom Damper with Filter

Position ### = Level and Position of Module in Air Handling Unit

Actuator Type 0 = Standard - None A = Two Position Actuator B = DDC Actuator

Filters 00 = Standard - None A0 = 2” Pleated, 30% Eff.

B0 = 4” Pleated, 30% Eff.

C0 = 4” Pleated, 65% Eff.

D0 = 4” Pleated, 85% Eff.

E0 = 4” Pleated, 95% Eff.

Safety Control

Bypass Opening 0 = Standard - None A = Top Open B = Bottom Open

Blank 0000 = Standard

Filter Options 0 = Standard - None A = Magnehelic Gauge B = Clogged Filter Switch C = Options A + B

Special 0 = Standard - None

Heat Module Feature String Nomenclature

D U

L

T

FU

C T

TE

R

S

R O

W S

FP

I

C

IR

C U

IT

A T

H

PA

C

IT

ST

G E

S

FU

E

L G

A S

C O

A

K E

FI

L

IO

N S

SP

E

C

IA

PHA - 104 - H - 00 - 0 00 0 0 - E 02 0 0 - 0 - 0

Heat Module Description

HEAT MODULE DESCRIPTION

Module ID PHA = Electric Heat PHB = Hot Water Coil PHC = Hot Water Coil with Filter PHD = Electric Heat with Filter PHG = Gas Heat

Position ### = Level and Position of Module in Air Handling Unit

Function B = Heating + Dehumidification D = Dehumidification H = Heating

Filters 00 = None A0 = 2” Pleated, 30% Eff.

B0 = 4” Pleated, 30% Eff.

C0 = 4” Pleated, 65% Eff.

D0 = 4” Pleated, 85% Eff.

E0 = 4” Pleated, 95% Eff.

HEATING COIL

Rows 0 = No Hot Water Heating 1 = 1 Row 2 = 2 Rows

FPI

00 = No Hot Water Heating 08 = 8 Fins Per Inch 10 = 10 Fins Per Inch 12 = 12 Fins Per Inch

Circuiting 0 = No Hot Water Heating F = Single Serpentine H = Half Serpentine Q = Quarter Serpentine

Coating

H = Stainless Steel Coil Casing & Copper Fins P = Polymer E-Coating S = Stainless Steel Coil Casing K = Stainless Steel Coil Casing & Polymer E- Coating

Heat Capacity 0 = Hot Water Heating Coil 1 = 50 MBH input 2 = 75 MBH input 3 = 100 MBH input 4 = 125 MBH input 5 = 150 MBH input 6 = 175 MBH input 7 = 200 MBH input 8 = 250 MBH input A = 300 MBH input OR 7 kW (5.3 kW @ 208V) B = 350 MBH input OR 14 kW (10.5kW @ 208V) C = 400 MBH input OR 21 kW (15.8 kW @ 208V) D = 28 kW (21 kW @ 208V) E = 42 kW (31.5 kW @ 208V) F = 56 kW (42 kW @ 208V) G = 70 kW (52.2 kW @ 208V) H = 35 kW (26.3 kW @ 208V) J = 84 kW (63 kW @ 208V) K = 112 kW (84.1 kW @ 208V) L = 126 kW (94.6 kW @ 208V) M = 168 kW (126.2 kW @ 208V) N = 10 kW (7.5 kW @ 208V) P = 20 kW (15 kW @ 208V) Q = 30 kW (22.5 kW @ 208V) R = 40 kW (30 kW @ 208V) S = 50 kW (37.5 kW @ 208V) T = 80 kW (60.1 kW @ 208V) U = 100 kW (75.1 kW @ 208V) V = 120 kW (90.1 kW @ 208V) W = 160 kW (120.1 kW @ 208V)

Heat Module Feature String Nomenclature

U L

T

FU

C T

TE

R

S

R O

W S

FP

I

C

IR

C U

IT

A T

PA

C

G E

S

FU

E

L G

A S

C O

A

K E

FI

L

IO

N S

T

PHA - 104 - H - 00 - 0 00 0 0 - E 02 0 0 - 0 - 0

Stages 00 = Hot Water Heating Coil 01 = 1 Stage 02 = 2 Stage 03 = 3 Stage 04 = 4 Stage 0M = Modulating 5:1 Stage Natural Gas Modulating 3:1 Stage LP Gas

Fuel Gas 0 = Natural Gas [Hot Water/Electric Heat] A = LP Gas

Combustion Intake 0 = Open Combustion [Hot Water/Electric Heat] A = Separated Combustion

Filter Options

A = Magnehelic Gauge B = Clogged Filter Switch C = Options A + B

Special 0 = None

S = Steam Heating

Blank Module Feature String Nomenclature

O

D U

L

T

A

W

SA

FE

N

T R

O L

B L

A

N

A

A

IN

P

C

IA

BBA - 101 - 0 - AR - 0 0000 - 0 0000 - 0 - 0

Blank Module Descript ion

BLANK MODULE DESCRIPTION

Module ID BBA = Small BBC = Large

BBD = XL

BBE = XXL

Position ### = Level and Position of Module in Air Handling Unit

Blank 0 = Standard

Airway Type 00 = Standard AR = Top Open, Right Hand End Panel AL = Top Open, Left Hand End Panel

Safety Control

Bypass Opening 0 = None A = Top Opening B = Bottom Opening

Blank 0000= Standard

Drain Pan Type 0 = None A = Auxiliary

Special

Cooling Coil Module Feature String Nomenclature

O

D U

L

T

O L

LE

C

T

IC

A T k

C

H E

G

E S

H E

A T

IL

R O

W S

H E

A T

IL

F

PI

A T

IL

C K

T H

E A

T C

A

T

O L

IL

R O

W S

C O

O L

IL

O

L

IL

C

K T

C O

O L

C

A T

A

IN

P

C

IA

CLC - 103 - F - 0 0 - 0 00 0 0 - 6 10 I P - S - 0

Coil Modu le Description

COOLING COIL MODULE

DESCRIPTION

Module ID CLB = Chilled Water or DX CLC = DX + Hot Gas Reheat CLF = Hot Water + Chilled Water or DX CLG = Electric Heat + Chilled Water or DX CLI = Hot Water, Chilled Water, or DX with Face and Bypass Dampers CLM = Chilled Water or DX, Shorter Length

Position ### = Level and Position of Module in Air Handling Unit

Cooling Type 0 = No Cooling A =R-410A Hot Gas Bypass [HGB] Lead + HGB Lag B = R-410A HGB Non-Variable Compressors

[HGBNV]

C = Chilled Water

F = DX R-410A

G = R-410A HGB Lead H = R-410A Heat Pump J = R-410A HGB Lead + Heat Pump K = R-410A HGB Lead + HGB Lag + Heat Pump L = R-410A HGBNV + Heat Pump

M =R-454B DX

N =R-454B HGB Lead P =R-454B Hot Gas Bypass [HGB] Lead + HGB Lag Q = R-454B HGB Non-Variable Compressors

[HGBNV]

R = R-454B Heat Pump S = R-454B HGB Lead + Heat Pump T = R-454B HGB Lead + HGB Lag + Heat Pump U = R-454B HGBNV + Heat Pump

ELECTRIC HEAT

Capacity 0 = No Electric Heat A = 7 kW (5.3 kW) B = 14 kW (10.5 kW) C = 21 kW (15.8 kW) D = 28 kW (21.0 kW) H = 35 kW (26.3 kW) E = 42 kW (35.0 kW) F = 56 kW (42.0 kW)

ELECTRIC HEAT

Capacity (continued) G = 70 kW (52.5 kW) J = 84 kW (63.1 kW) K = 112 kW (84.1 kW) L = 126 kW (94.6 kW) M = 168 kW (126.2 kW)

Stages 0 = Standard - None 1 = 1 Stage 2 = 2 Stage 3 = 3 Stage 4 = 4 Stage

HEATING COIL

Rows 0 = No Hot Water Heating 1 = 1 Row 2 = 2 Rows

FPI

00 = No Hot Water Heating 08 = 8 Fins Per Inch 10 = 10 Fins Per Inch 12 = 12 Fins Per Inch 14 = 14 Fins Per Inch

Circuiting 0 = No Hot Water Heating F = Single Serpentine H = Half Serpentine Q = Quarter Serpentine

Coating 0 = Standard P = Polymer E-Coating S = Stainless Steel Coil Casing H = Stainless Steel Coil Casing & Copper Fins K = Stainless Steel Coil Casing & Polymer E- Coating

COOLING COIL

Rows 0 = No Cooling Coil 4 = 4 Rows 6 = 6 Rows 8 = 8 Rows

Cooling Coil Module Feature String Nomenclature

O

D U

L

T

O L

C

T

IC

A T k

C

H E

G

E S

H E

A T

IL

R O

W S

H E

A T

IL

A T

IL

C K

T H

E A

T C

A

T

O L

IL

R O

W S

C O

O L

IL

O

L

IL

C

K T

C O

O L

C

A T

A

IN

P

C

IA

CLC - 103 - F - 0 0 - 0 00 0 0 - 6 10 I P - S - 0

FPI

00 = No Cooling Coil 08 = 8 Fins Per Inch 10 = 10 Fins Per Inch 12 = 12 Fins Per Inch

Circuiting 0 = No Cooling Coil D = Double Serpentine F = Single Serpentine H = Half Serpentine Q = Quarter Serpentine S = DX Single Circuit I = DX Dual Circuit, Interlaced

Coating 0 = Standard P = Polymer E-Coating S = Stainless Steel Coil Casing

H = Stainless Steel Coil Casing & Copper Fins K = Stainless Steel Coil Casing & Polymer E- Coating

Drain Pan 0 = No Drain Pan S = Stainless Steel

Special 0 = None

S = Steam Heating

Controls Module Feature String Nomenclature

O

D U

L

T

A

A

SA

FE

N

T R

O L

B L

A

A

A

C

IA

TRA - 101 - 0 - 00 - 0 0000 - 00000 - 0 - 0

Controls Module Description

CONTROLS MODULE DESCRIPTION

Module ID TRA = Small TRC = Large

Position ### = Level and Position of Module in Air Handling Unit

Blank 0 = Standard

00 = Standard

Safety Control

2 = Firestat

Blank 0000 = Standard

Blank 00000 = Standard

Blank 0 = Standard

Special

Energy Recovery Module Feature String Nomenclature

O

D U

L

T

EE

Z E

R E

C O

V E

A

A

V

FD

N

T R

O L

SP

E

C

IA

HRA - 102 - A - 00 - 00000 - 00000 - 0 - 0

Energy Recovery Module Descript ion

ENERGY RECOVERY MODULE

DESCRIPTION

Module ID HRA = AAONAIRE® Energy Recovery Wheel

Position ### = Level and Position of Module in Air Handling Unit

Wheel Size A = Standard

Recovery Type 00 = Total Energy Recovery 0A = Total Energy Recovery + 1% Purge A0 = Sensible Only Energy Recovery AA = Sensible Only Energy Recovery + 1% Purge

00000 = Standard

Blank 00000 = Standard

VFD Control 0 = Standard A = VFD Controlled Wheel

Special

Water-Source Heat Pump Module Feature String Nomenclature

O

D U

L

T

V

IS

PA

C

M P

ST

A

G

A

FR

IG

IO

N S

R E

FR

IG

C

A

T

EA

T

EX

C

H A

N

ER

LA

EC

IA

WHP - 204 - A - 25 - D K 000 - D A 0 H 0 - 0 - 0

Water-Source Heat Pump Module Description

WATER-SOURCE HEAT PUMP

MODULE DESCRIPTION

Module ID WHP = Water-Source Heat Pump WCC = Water-Cooled Condenser (A/C only)

Position ### = Level and Position of Module in Air Handling Unit

Revision A

Capacity 16 = 16 tons 18 = 18 tons 20 = 20 tons 25 = 25 tons 30 = 30 tons 40 = 40 tons 50 = 50 tons 60 = 60 tons 70 = 70 tons

Compressor Style A = R-410A Scroll Compressor B = R-410A 2-Step Capacity Scroll Compressor D = R-410A Variable Capacity Scroll Compressor E = R-410A Tandem Scroll Compressor G = R-410A Tandem Variable Capacity Scroll Compressor J = R-454B 2 step Scroll M = R-454B Tandem Scroll Compressor N = R-454B Tandem Variable Capacity Scroll Compressor

Staging G = 1 On/Off Refrigeration System H = 1 Variable Capacity Refrigeration System J = 2 On/Off Refrigeration Systems K = Lead Variable Capacity Refrigeration System + Lag On/Off Refrigeration System L = 2 Variable Capacity Refrigeration Systems M = 2 Two Step Refrig System N = 1 Variable Refrig System + 1 Two Step Refrig System

000 = Standard

Refrigeration Options 0 = Standard A = Hot Gas Bypass [HGB] - Lead B = HGB Lead + HGB Lag C = HGB Lag

Refrigeration Accessories 0 = Standard A = Sight Glass B = Compressor Isolation Valves C = Sight Glass + Compressor Isolation Valves

Blank 0 = Standard

Water-Side Options 0 = Standard A = Balancing Valves B = Water Flow Switch C = Motorized Shut-off Valve D = 2 Way Head Pressure Control E = 3 Way Head Pressure Control F = Options B + A G = Options B + C H = Options B + D J = Options B + E K = Options B +A + C L = Options B + A + D M = Options B + A + E P = Options A + C Q = Options A + D R = Options A + E

Heat Exchanger Type 0 = Standard A = SMO 254 Brazed Plate Heat Exchanger B = Cupronickel Coaxial Heat Exchanger

Blank 0 = Standard

Special

Unit Orientation Determine left hand or right hand orientation/connections:

Figure 2 - Unit Orientation

Consider the airflow to be hitting the back of your head.

M2 Series Top View

Return Air “Back”

Supply Air “Front”

Left Hand Side

Right Hand Side

Connections & service access on left side for left hand orientation

AIRFLOW

Filter Coil Supply Fan

General Information

M2 Series modular indoor air handling units and self-contained units have been designed for indoor installation. Flexible connectors are required on all duct connections to minimize air leaks.

M2 Series units are designed for safe operation when installed, operated and maintained within design specifications and the instructions in this manual. It is necessary to follow these instructions to avoid personal injury or damage to equipment or property during equipment installation, startup, operation and maintenance. M2 Series units are intended for installation up to 3500 meters (11,500 ft).

Certification of Gas Heat Models

a. Certified as a Category III forced air furnace with or without cooling.

b. Certified for indoor installation.

Certification of Steam or Hot Water Heat Models

a. Certified as a forced air heating system with or without cooling.

b. Certified for indoor installation.

Certification of Electric Heat Models

a. Certified as an electric warm air furnace with or without cooling.

b. Certified for indoor installation.

Certification of Cooling Models

a. Certified as a commercial central air conditioner.

b. Certified for indoor 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. A copy of this IOM should be kept with

These units must not be used for heating or cooling at any time during any phase of construction. Very low return air temperatures, harmful vapors, and misplacement of the filters will damage the unit and its efficiency.

This equipment is protected by a standard limited warranty under the condition that initial installation, service, startup and maintenance is performed according to the instructions set forth in this manual.

This manual should be read in its entirety prior to installation and before performing any service or maintenance work.

Equipment described in this manual is available with many optional accessories. If you have questions after reading this manual in its entirety, consult other factory documentation or contact your AAON Sales Representative to obtain further information before manipulating this equipment or its optional accessories

c. Certified with refrigerant R-410A coils or with chilled water cooling coils.

Codes and Ordinances M2 Series units have been tested and certified, by ETL, in accordance with UL- 1995 5th edition.

System should be sized in accordance with the American Society of Heating, Refrigeration and Air Conditioning Engineers Handbook.

Installation of M2 Series units must conform to the ICC standards of the International Mechanical Code, the International Building Code, and local building, plumbing and waste water codes. In the absence of local codes installation must conform to the current (United States) National Fuel Gas Code ANSI-Z223.1/NFPA 54 or the current (Canada) National Fuel & Propane Installation Code CSA B149.1 or B149.2, and Mechanical Refrigeration Code CSA B52. All appliances must be electrically grounded in accordance with local codes, or in the absence of local codes, the current National Electric Code, ANSI/NFPA 70 or the current Canadian Electrical Code CSA C22.1.

Receiving Unit When received, the unit should be checked for damage that might have occurred in transit. If damage is found it should be noted on the carrier’s freight bill. A request for inspection by carrier’s agent should be made in writing at once.

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. Certain equipment alteration, repair, and manipulation of equipment without the manufacturer’s consent may void the product warranty. Contact the AAON Technical Support for assistance with handling damaged goods, repairs, and freight claims: (918) 382-6450.

Note: Upon receipt check shipment for items that ship loose such as filters and remote sensors. Consult order and shipment documentation to identify potential loose-shipped items. Loose-shipped items may have been placed inside unit cabinet for

Failure to observe the following instructions will result in premature failure of your system and possible voiding of the warranty.

The Clean Air Act of 1990 bans the intentional venting of refrigerant as of July 1, 1992. Approved methods of recovery, recycling, or reclaiming must be followed.

Coils and sheet metal surfaces present sharp edges and care must be taken when working with equipment.

WARNING

security. Installers and owners should secure all doors with locks or nuts and bolts to prevent unauthorized access.

Figure 3 - Lockable Handle

Storage This equipment is not suitable for outdoor use of storage. If installation will not occur immediately following delivery, store equipment in a dry protected area away from construction traffic and in the proper orientation as marked on the packaging with all internal packaging in place. Secure all loose-shipped items.

Direct Expansion (DX) Units All factory-assembled packaged DX refrigeration systems are leak tested, charged with refrigerant, and run tested. Field-assembled and split system DX refrigeration systems are charged with a nitrogen holding charge instead of refrigerant.

All packaged water-source DX refrigerant systems include an evaporator, condenser, liquid line filter driers, thermal expansion valves (TXV) and scroll compressors.

Never cut off the main power supply to the unit, except for servicing, emergency, or complete shutdown of the unit. When power is cut off from the unit, crankcase heaters cannot prevent refrigerant migration into the compressors. This means the compressor will cool down and liquid refrigerant may accumulate in the compressor. The compressor is designed to pump refrigerant gas and damage may occur when power is restored.

If power to the unit must be off for more than an hour, turn the thermostat system switch to "OFF", or turn the unit off at the control

CRANKCASE HEATER

OPERATION

Some units are equipped with compressor crankcase heaters, which should be energized at least 24 hours prior to cooling operation, to clear any liquid refrigerant from the compressors.

COMPRESSOR CYCLING

5 MINUTE OFF TIME

To prevent motor overheating, compressors must cycle off for a

5 MINUTE ON TIME

To maintain the proper oil level, compressors must cycle on for a

The cycle rate must not exceed 6 starts per hour.

panel, and leave the unit off until the main power switch has been turned on again for at least 24 hours for units with compressor crankcase heaters. This will give the crankcase heater time to clear any liquid accumulation out of the compressor before it is started.

Always control the unit from the thermostat, or control panel, never at the main power supply, except for servicing, emergency or complete shutdown of the unit.

During the cooling season, if the air flow is reduced due to dirty air filters or any other reason, the cooling coils can get too cold which will cause excessive liquid to return to the compressor. As the liquid concentration builds up, oil is washed out of the compressor, leaving it starved for lubrication.

The compressor life will be seriously shorted by reduced lubrication and the pumping of excessive amounts of liquid oil and refrigerant.

Note: Low Ambient Operation Air-cooled DX units without a low ambient option, such as condenser fan cycling, ECM driven condenser fans or the -17.8°C (0°F) low ambient option, will not operate in the cooling mode of operation properly when the outdoor temperature is below 12.8°C (55°F).

Low ambient and/or economizer options are recommended if cooling operation below 12.8°C (55°F) is expected.

Note: Multiple Units with Multiple Thermostats When several heating and cooling units are used to condition a space, all unit thermostat switches must be set in either heating mode, cooling mode, or off. Do not leave part of the units switched to the opposite mode. Cooling only units should be switched off at the thermostat during the heating season.

Gas or Electric Heating The unit is designed to heat a given amount of air while operating. If this amount of air is greatly reduced, approximately 1/3 during the heating season, the gas heat exchanger or electric heating coil may overheat, and may cut the burner or heater off entirely by action of the safety high temperature limit devices which are factory mounted at the heat exchanger and supply fan areas.

Airflow should be adjusted after installation to obtain an air temperature rise within the range specified on the unit rating plate at the required external static pressure.

Should overheating occur with a gas heat exchanger, or the gas supply fail to shut off, shut off the manual gas valve to the furnace before shutting off the electrical supply.

Prolonged overheating of the heat exchanger will shorten its life.

The maximum supply air temperature is 60°C (140°F).

Wiring Diagrams Unit specific wiring diagrams are laminated and affixed inside the controls compartment door.

Condensate Drain Pan Unit requires drain traps to be connected to the condensate drain pan of the unit.

Polyolester (POE) and Polyvinylether (PVE) oils are two types of lubricants used in hydrofluorocarbon (HFC) refrigeration systems. Refer to the compressor label for the proper compressor lubricant type.

For condensate drain lines, the line should be the same pipe size or larger than the drain connection, include a p-trap, and pitch downward toward drain. An air break should be used with long runs of condensate lines.

See Installation section of this manual for more information.

Table 1 – Electric and Gas Heating Capacities

Unit should not be operated without a p-trap. Failure to install a p-trap may result in overflow of condensate water.

An auxiliary / emergency drain pan is recommended for all indoor applications where there is a risk of water damage to surrounding structure or furnishings. Refer to local codes.

Installation

The M2 can either be shipped assembled or shipped in individual modules. See the Module Assembly section of this document for instructions on individual modules.

Locating Units Verify foundation or mounting frame can support the total unit weight, including accessory weights.

Before setting the unit into place, caution must be taken to provide clearance for unit doors that must be accessible for periodic service. These areas contain the controls, safety devices, refrigerant or water piping, shut-off valves and filters.

A minimum clearance equal to the width of the unit is required on the access panel side of the unit to ensure there is enough room to slide out coils and energy recovery wheels, and to access filters, fans and other internal components.

For gas fired unit, do not position flue opening to discharge into a fresh air intake of any other piece of equipment. Unit should also be installed so that the flow of combustion intake air is not obstructed from reaching the furnace.

Flue gas is dangerously hot and contains containments. The user is responsible for determining if vent gases may degrade building materials.

The National Gas and Propane Installation Code, B149.1 specifies a 1.8 m (6 ft) horizontal vent terminal clearance to gas and electric meters and relief devices.

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

When locating gas fired units, it is recommended the unit be installed so that the flue discharge vents are located at least 305 cm (120 inches) away from any opening through which combustion products could enter the building.

Distances from adjacent public walkways, adjacent buildings, operable windows and building openings, shall conform to local codes and/or the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the National Gas & Propane Code, CSA B149.1

Local codes may supersede or further place restrictions on vent termination locations.

Figure 4 - Service Access Clearance

Table 2 - Minimum Clearances

Unit Size Minimum Required Service Clearance

X = M2-018 84” M2-026 84” M2-036 96”

Lifting the Assembled Unit Units may be delivered as separate modules or completely factory assembled with all modules connected. In the latter case, if the unit was received fully assembled, the recommended method of lifting is to insert a

38.1 mm (1-1/2”) steel pipe through the lifting lugs along the entire length of the unit, then pick the unit up using a spreader bar assembly. Refer to Figure 5 - M2 Series Unit Four Point Lifting and Figure 6 - M2 Series Unit Eight Point Lifting.

If cables or chains are used to hoist the unit they must be the same length. Care should be taken to prevent damage to the cabinet, coils and condenser fans.

Before lifting unit, be sure that all shipping material has been removed from unit.

UNIT HANDLING

To prevent injury or death lifting equipment capacity shall exceed unit weight by an adequate safety factor.

Always test-lift unit not more than 61 cm (24 inches) high to verify proper center of gravity lift point to avoid unit

Incorrect lifting can cause damage to

X

Coil

Energy Recovery

Wheel Module

Energy Recovery

Wheel

Coil Module

Fan

Figure 5 - M2 Series Unit Four Point Lifting

Figure 6 - M2 Series Unit Eight Point Lifting

Lifting the Individual Modules The bottom tier individual modules have lifting lugs built into the base. Individual bottom tier modules can be lifted by securing hooks and cables at all four lugs provided on the module.

Figure 7 - M2 Series Individual Module Bottom Tier Lifting

The top tier individual modules are shipped on individual wooden pallets and do not have base lifting lugs. They can be lifted by wrapping a strap around each side of the module or using a forklift truck.

Figure 8 - M2 Series Individual Module Top

Tier Lifting

Floor Mounted Units Dual path units, self-contained units and units over size M2-018 must be floor mounted.

Make sure the unit is level, and installed with a minimum height of 15.25 cm (6”) to allow for proper drainage of the condensate line.

Standard units are built with a 15.25 cm (6”).

Other installation provisions may be necessary according to job specifications.

A ceiling suspended mounting frame must be provided for unit suspension. It is the responsibility of the engineer or installing contractor to design and build a suitable structure based on the load distribution of individual modules.