AAON RL-240 User Manual

RL SERIES

Packaged Rooftop Units & Outdoor Air Handling Units

Installation, Operation,

Do not touch any electrical switch; do not

Immediately call your gas supplier from a phone remote from the building. Follow the

If you cannot reach your gas supplier, call

WARNING

service instructions in this manual.

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

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.

& Maintenance

o Do not store gasoline or other flammable

o WHAT TO DO IF YOU SMELL GAS

o Startup and service must be performed by a

vapors and liquids in the vicinity of this or any other appliance

 Do not try to light any appliance.



use any phone in your building.

 Leave the building immediately.



gas supplier’s instructions.



the fire department.

Factory Trained Service Technician.

Table of Contents

Safety .............................................................................................................................................. 8

RL Series Feature String Nomenclature ....................................................................................... 13

General Information ...................................................................................................................... 22

Certification of Gas Heat Models ............................................................................................. 22

Certification of Steam or Hot Water Heat Models ................................................................... 22

Certification of Electric Heat Models ....................................................................................... 22

Certification of Cooling Models ............................................................................................... 22

Codes and Ordinances .............................................................................................................. 22

Receiving Unit .......................................................................................................................... 23

Storage ...................................................................................................................................... 23

Packaged Direct Expansion (DX) Units ................................................................................... 23

Gas or Electric Heating ............................................................................................................. 24

Wiring Diagrams ....................................................................................................................... 24

Condensate Drain Pan ............................................................................................................... 24

Installation..................................................................................................................................... 25

Locating Units ........................................................................................................................... 25

Curb Installation ....................................................................................................................... 25

Duct Connection ....................................................................................................................... 26

Lifting the Unit ......................................................................................................................... 27

Reassembling Split Units .......................................................................................................... 29

Electrical Connection of Split Units ......................................................................................... 30

Outside Air Rain Hood ............................................................................................................. 30

End Flashing Installation .......................................................................................................... 30

Vestibule Exhaust Fan .............................................................................................................. 31

Electrical ................................................................................................................................... 31

Gas Heating ............................................................................................................................... 33

Piping Sizing Example .......................................................................................................... 33

Inlet and Manifold Pressures ................................................................................................ 33

Gas Pressure Regulator & Overpressure Protection Device ................................................. 34

Piping Supports ..................................................................................................................... 34

Additional Gas Piping Considerations .................................................................................. 34

Leak Testing .......................................................................................................................... 34

Rain Hoods ............................................................................................................................ 35

Condensate Drain Piping .......................................................................................................... 36

Draw-Through Coils ................................................................................................................. 37

Hot Water/Steam Heating and Chilled Water Cooling Coils ................................................... 38

Evaporative-Cooled Condenser ................................................................................................ 38

Startup ........................................................................................................................................... 40

Supply, Return, and Exhaust Backward Curved Fans .............................................................. 40

Airflow Adjustment .............................................................................................................. 40

Power Return and Exhaust Axial Flow Fans ............................................................................ 41

RL Prop Assembly .................................................................................................................... 43

Spring Isolator Adjustment ....................................................................................................... 43

Back Draft Damper Setup ......................................................................................................... 44

Filters ........................................................................................................................................ 45

Cartridge Filter Installation ....................................................................................................... 45

Adjusting Refrigerant Charge ................................................................................................... 45

Before Charging .................................................................................................................... 45

Checking Liquid Sub-Cooling .............................................................................................. 46

Checking Evaporator Superheat............................................................................................ 46

Adjusting Sub-cooling and Superheat Temperatures............................................................ 47

Refrigerant Filter Driers ............................................................................................................ 47

Indirect Gas Heat Startup .......................................................................................................... 49

Access Doors ............................................................................................................................ 50

Operation....................................................................................................................................... 51

Indirect Gas Heater Operation .................................................................................................. 51

Electric Heating Operation ....................................................................................................... 51

Steam or Hot Water Preheating and Heating Operation ........................................................... 51

Packaged DX Cooling Operation ............................................................................................. 51

Chilled Water or Non-Compressorized DX Cooling Operation ............................................... 51

Maintenance .................................................................................................................................. 52

Gas Heating ............................................................................................................................... 52

Direct Fired Gas Heat ............................................................................................................... 52

Ignition Sequence of Operations: ............................................................................................. 53

Safeties: ..................................................................................................................................... 53

Initial Start-up Procedure: ......................................................................................................... 54

First Firing or Restart after Extended Shut-down: .................................................................... 54

General Maintenance Instructions: ........................................................................................... 54

Inspection and Maintenance of Gas Ports: ............................................................................... 55

DX Cooling ............................................................................................................................... 55

Condensate Drain Pans ............................................................................................................. 56

Supply Fans ............................................................................................................................... 56

Lubrication ............................................................................................................................ 56

Filter Replacement .................................................................................................................... 56

Evaporative-Cooled Condenser ................................................................................................ 56

Severe Service ........................................................................................................................... 57

Safety ........................................................................................................................................ 57

Performance .............................................................................................................................. 57

Warranties ................................................................................................................................. 58

Condenser Tube Inspection ...................................................................................................... 58

Freeze Protection ...................................................................................................................... 58

Recirculating Water System ..................................................................................................... 58

Pre Start-Up .............................................................................................................................. 58

Cleanliness ................................................................................................................................ 58

Storage ...................................................................................................................................... 58

Pump Operation ........................................................................................................................ 58

Running ..................................................................................................................................... 59

Condenser Fan Motors .............................................................................................................. 59

Water Makeup Valve ................................................................................................................ 59

Water Treatment System .......................................................................................................... 60

Sequence of Operations ............................................................................................................ 60

Pump Maintenance ................................................................................................................... 61

Fan Motor Maintenance ............................................................................................................ 61

Access Doors ............................................................................................................................ 61

Bearings - Lubrication .............................................................................................................. 61

Recommended Monthly Inspection .......................................................................................... 61

Mist Eliminators ....................................................................................................................... 62

Air Inlet ..................................................................................................................................... 62

Stainless Steel Base Pan ........................................................................................................... 62

Propeller Fans and Motors ........................................................................................................ 62

Recommended Annual Inspection ............................................................................................ 62

Cleaning .................................................................................................................................... 62

Water Quality ............................................................................................................................ 62

Mechanical Cleaning ................................................................................................................ 63

Air-Cooled Condenser .............................................................................................................. 64

Replacement Parts ..................................................................................................................... 76

AAON Customer Service Department ..................................................................................... 76

RL Series Startup Form ................................................................................................................ 77

Maintenance Log .......................................................................................................................... 82

Literature Change History............................................................................................................. 83

R10091 · Rev. A · 140226

Index of Tables and Figures

Tables

Table 1 - Unit Clearances ............................................................................................................. 25

Table 2 - Mounting Dimensions ................................................................................................... 27

Table 3 - Gas Piping Connections ................................................................................................ 33

Table 4 - Natural Gas Maximum Piping Capacities (ft3/hr) ......................................................... 33

Table 5 - Piping Support Intervals ................................................................................................ 34

Table 6 - Draw-Through Drain Trap Dimensions ........................................................................ 37

Table 7 - Blow-Through Drain Trap Dimensions ......................................................................... 38

Table 8 - Plenum Fan Set Screw Specifications ........................................................................... 41

Table 9 - Return/Exhaust Fan Pin Location in the Bushing Mount .............................................. 43

Table 10 - Return/Exhaust Fan Pin Location in the Grooves ....................................................... 43

Table 11 - Prop assembly bushing torque specifications .............................................................. 43

Table 12 - Acceptable Sub-Cooling and Superheat Temperatures ............................................... 46

Table 13 - Filter Drier Maximum Pressure Drop.......................................................................... 47

Table 14 - R-410A Refrigerant Temperature-Pressure Chart ....................................................... 48

Table 15 - Recirculating Water Quality Guidelines ..................................................................... 62

Table 16 - RL-045, RL-060, and RL-070 Standard Filters........................................................... 65

Table 17 - RL-045, RL-060, and RL-070 Standard Filters........................................................... 65

Table 18 - RL-075, RL-090, and RL-095 Standard Filters........................................................... 65

Table 19 - RL-075, RL-090, and RL-095 Standard Filters........................................................... 65

Table 20 - RL-100, RL-110, RL-120, RL-125, and RL-135 Standard Filters .............................. 65

Table 21 - RL-100, RL-110, RL-120, RL-125, and RL-135 Standard Filters .............................. 66

Table 22 - RL-134, RL-150, RL-155, and RL-170 Standard Filters ............................................ 66

Table 23 - RL-134, RL-150, RL-155, and RL-170 Standard Filters ............................................ 66

Table 24 - RL-180, RL-181, RL-190, RL-210, RL-230, and RL-240 Standard Filters ............... 66

Table 25 - RL-180, RL-181, RL-190, RL-210, RL-230, and RL-240 Standard Filters ............... 66

Table 26 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters ............................. 67

Table 27 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters ............................. 68

Table 28 - RL-045 to RL-125 and RL-135 High Efficiency Bag Filters...................................... 69

Table 29 - RL-045 to RL-125 and RL-135 High Efficiency Bag Filters...................................... 69

Table 30 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters ............................. 70

Table 31 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters ............................. 71

Table 32 - RL-134 and RL-150 to RL-240 High Efficiency Bag Filters ...................................... 72

Table 33 - RL-134 and RL-150 to RL-240 High Efficiency Bag Filters ...................................... 73

Table 34 - RL-045 to RL-125 and RL-135 High Efficiency Cartridge Filters ............................. 74

Table 35 - RL-045 to RL-125 and RL-135 High Efficiency Bag Filters...................................... 74

Table 36 - RL-134 and RL-150 to RL-240 High Efficiency Cartridge Filters ............................. 75

Table 37 - RL-134 and RL-150 to RL-240 High Efficiency Bag Filters ...................................... 75

Table 38 - RL-045 to RL-125 and RL-135 Energy Recovery Wheel Filters ............................... 76

Table 39 - RL-134 and RL-150 to RL-240 Energy Recovery Wheel Filters ............................... 76

Figures

Figure 1 - RL Series Unit Orientation ........................................................................................... 25

Figure 2 - Curb Mounting ............................................................................................................. 26

Figure 3 - Curb Detail ................................................................................................................... 26

Figure 4 - Curb Mounting with Dimensions ................................................................................. 27

Figure 5 - Steel Mounting Rail with Dimensions ......................................................................... 27

Figure 6 - Marked Lifting Points .................................................................................................. 27

Figure 7 - Unit Base and Sides ..................................................................................................... 29

Figure 8 - Unit Roof Flange Splice Detail .................................................................................... 29

Figure 9 - Air Hood Shown in the Open Position ......................................................................... 30

Figure 10 - Factory Supplied End Flashings................................................................................. 31

Figure 11 - Vestibule Exhaust Fan................................................................................................ 31

Figure 12 - Terminal Block ........................................................................................................... 32

Figure 13 - Gas Heater Rain Hood ............................................................................................... 35

Figure 14 - Gas Heater Rain Hood Screws ................................................................................... 36

Figure 15 - Draw-Through Drain Trap ......................................................................................... 37

Figure 16 - Blow-Through Drain Trap ......................................................................................... 37

Figure 17 - Evaporative-Cooled Cond. Section, Including Field Water Connections and Base

Cutout ............................................................................................................................................ 39

Figure 18 - Air Volume Band ....................................................................................................... 40

Figure 19 - Air Volume Band Tab Locations ............................................................................... 40

Figure 20 - Securing Air Volume Band Ends ............................................................................... 41

Figure 21 - Plenum Fan Gap Tolerances ...................................................................................... 41

Figure 22 - Fan with the HUB on the top and RET on the bottom. .............................................. 42

Figure 23 - Fan Bushing Mount Location..................................................................................... 42

Figure 24 - RET shown with pin in groove 4 ............................................................................... 42

Figure 25 - HUB and RET ............................................................................................................ 42

Figure 26 - Blower Assembly ....................................................................................................... 44

Figure 27 - Rear Isolator Detail .................................................................................................... 44

Figure 28 - Fan Assembly Detail .................................................................................................. 44

Figure 29 - Closed Back Draft Damper ........................................................................................ 45

Figure 30 - Open Back Draft Damper........................................................................................... 45

Figure 31 - Top Clip and Side Spring Fastener Securing Filters in Place .................................... 45

Figure 32 - Replaceable Core Filter/Drier .................................................................................... 47

Figure 33 - Lockable Door Handles.............................................................................................. 50

Figure 34 - Typical Factory Mutual (FM) Gas Piping Schematic for a Direct Fired Heater ....... 53

Figure 35 - Removing Piping Scale with Pin Vise ....................................................................... 55

Figure 36 - Proper Unit Location .................................................................................................. 57

Figure 37 - Improper Unit Locations ............................................................................................ 57

Figure 38 - Water Makeup Valve ................................................................................................. 60

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.

WARNING

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.

 Never test for gas leaks with an

open flame.

 Use a gas detection soap solution

and check all gas connections and shut off valves.

CAUTION

Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.

WARNING

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.

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.

WARNING

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.

WARNING

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.

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.

WARNING

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.

WARNING

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.

WARNING

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 24 inches high to verify proper center of gravity lift point to avoid unit damage, injury or death.

WARNING

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

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. Alterations should only be made at the unit power connection

CAUTION

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.

WARNING

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.

WARNING

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.

WARNING

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.

CAUTION

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.

WARNING

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.

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.

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

CAUTION

Cleaning the cooling tower or condenser water loop with harsh chemicals such as hydrochloric acid (muriatic acid), chlorine or other chlorides, can damage the refrigerant-to-water heat exchanger. Care should be taken to avoid allowing chemicals to enter the refrigerant-to-water heat exchanger. See Appendix A - Heat Exchanger Corrosion Resistance for more information.

CAUTION

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.

WARNING

COMPRESSOR CYCLING

5 MINUTE MINIMUM OFF TIME To prevent motor overheating compressors must cycle off for a minimum of 5 minutes.

5 MINUTE MINIMUM ON TIME To maintain the proper oil level compressors must cycle on for a minimum of 5 minutes.

The cycle rate must not exceed 6 starts per hour.

WARNING

1. Startup and service must be performed

by a Factory Trained Service Technician.

2. Use only with type of the gas approved

for the furnace. Refer to the furnace rating plate.

3. The unit is for outdoor use only. See

General Information section for more information.

4. Provide adequate combustion ventilation

WARNING

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.

5. Always install and operate furnace

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

6. The supply and return air ducts shall 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.

7. Clean furnace, duct, and components

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

8. 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.

9. READ THE ENTIRE INSTALLATION,

OPERATION, AND MAINTENANCE MANUAL. OTHER IMPORTANT SAFETY PRECAUTIONS ARE PROVIDED THROUGHOUT THIS MANUAL.

10. Keep this manual and all literature

safeguarded near or on the unit.

RL Series Feature String Nomenclature

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

BASE MODEL

SERIES AND GENERATION

UNIT SIZE

045 = 45 Nominal Tons 060 = 60 Nominal Tons 070 = 70 Nominal Tons 075 = 75 Nominal Tons 090 = 90 Nominal Tons 095 = 95 Nominal Tons 100 = 100 Nominal Tons 110 = 110 Nominal Tons 120 = 120 Nominal Tons 125 = 125 Nominal Tons 134 = 134 Nominal Tons 135 = 135 Nominal Tons 150 = 150 Nominal Tons 155 = 155 Nominal Tons 170 = 170 Nominal Tons 180 = 180 Nominal Tons 181 = 181 Nominal Tons 190 = 190 Nominal Tons 210 = 210 Nominal Tons 230 = 230 Nominal Tons 240 = 240 Nominal Tons

VOLTAGE

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

INTERIOR PROTECTION

0 = Standard A = Interior Corrosion Protection

Model Option A: COOLING

A1: COOLING STYLE

B = Blow-Through, R-410A, Dual Circuited C = Draw-Through, R-410A, Dual Circuited D = Blow Through - R-134a Variable Capacity OilFree Magnetic Bearing Centifugal Compressors E = Draw Through - R-134a Variable Capacity OilFree Magnetic Bearing Centifugal Compressors F = Blow-Through AHU w/ Vestibule G = Draw-Through AHU w/ Vestibule H = Blow-Through AHU w/ Front Control Panel J = Draw-Through AHU w/ Front Control Panel M = Blow-Through AHU w/ End Control Panel N = Draw-Through AHU w/ End Control Panel R = Blow-Through, R-410A, Independ Circuited S = Draw-Through, R-410A, Independ Circuited 7 = Blow-Through, R410A VFD Compatible Compressors 8 = Draw-Through, R410A VFD Compatible Compressors

A2: COOLING CONFIGURATION

0 = No Cooling A = Air-Cooled Cond, 4 Row High CFM Evap B = Air-Cooled Cond, 6 Row High CFM Evap C = Air-Cooled Cond, 4 Row Low CFM Evap D = Air-Cooled Cond, 6 Row Low CFM Evap E = Evap-Cooled Cond, 4 Row High CFM Evap F = Evap-Cooled Cond, 6 Row High CFM Evap G = Evap-Cooled Cond, 4 Row Low CFM Evap H = Evap-Cooled Cond, 6 Row Low CFM Evap J = Water-Cooled Cond, 4 Row High CFM Evap K = Water-Cooled Cond, 6 Row High CFM Evap L = Water-Cooled Cond, 4 Row Low CFM Evap M = Water-Cooled Cond, 6 Row Low CFM Evap U = Chilled Water, 4 Row High CFM V = Chilled Water, 4 Row Low CFM W = Chilled Water, 6 Row High CFM Y = Chilled Water, 6 Row Low CFM Z = Chilled Water, 8 Row High CFM 1 = Chilled Water, 8 Row Low CFM 2 = Non-Compressorized, 4 Row High CFM Evap 3 = Non-Compressorized, 4 Row Low CFM Evap 4 = Non-Compressorized, 6 Row High CFM Evap 5 = Non-Compressorized, 6 Row Low CFM Evap

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

RL Series Feature String Nomenclature

Model Option A: COOLING

A3: COOLING COATING

0 = Standard 1 = Polymer E-Coated, Cooling Coil Only 2 = SS Coil Casing, Cooling Coil Only 6 = Polymer E-Coated, Evap and Cond B = Polymer E-Coated, Cond Only

A4: COOLING STAGING

0 = No Cooling 2 = 2 Stage 3 = 3 Stage 4 = 4 Stage 6 = 6 Stage 8 = 8 Stage A = Single Serp, 8 FPI B = Half Serp, 8 FPI H = 2 Stage, Shell & Tube J = 3 Stage, Shell & Tube K = 4 Stage, Shell & Tube L = 6 Stage, Shell & Tube M = 8 Stage, Shell & Tube N = Single Serp, 10 FPI P = Half Serp, 10 FPI Q = Single Serp, 12 FPI R = Half Serp, 12 FPI Z = All Compressors Variable Speed

Model Option B: HEATING

B1: HEATING STYLE

0 = No Heat 1 = Electric Heat 2 = Natural Gas Single Rack 3 = Natural Gas Double Rack 4 = High Altitude Natural Gas Single Rack 5 = High Altitude Natural Gas Double Rack A = Steam, Standard B = Steam, Polymer E-coated C = Steam Distributing, Standard D = Steam Distributing, Polymer E-Coated E = Hot Water, Standard F = Hot Water, Polymer E-Coated

B2: HEATING DESIGNATION

0 = No Heat 1 = Heat 1 2 = Heat 2 3 = Heat 3 4 = Heat 4 5 = Heat 5 6 = Heat 6 7 = Heat 7 8 = Heat 8 A = 1 Row Coil A B = 1 Row Coil B C = 1 Row Coil C D = 1 Row Coil D E = 2 Row Coil A F = 2 Row Coil B G = 2 Row Coil C H = 2 Row Coil D

B3: HEATING STAGING

0 = No Heat 1 = 2 Stage 2 = 4 Stage 3 = 8 Stage 4 = 12 Stage H = Single Serpentine J = Half Serpentine

RL Series Feature String Nomenclature

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

Feature 1: RETURN/OUTSIDE AIR

1A: RETURN/OUTSIDE AIR SECTION

0 = Standard, Manual Outside Air A = Economizer B = Econ with Power Exhaust C = Econ with Power Return D = Energy Recovery Wheel (Total), Small E = ERW (Total), Medium F = ERW (Total), Large G = ERW (Total), Extra Large H = ERW (Sens), Small J = ERW (Sens), Medium K = ERW (Sens), Large L = ERW (Sens), Extra Large M = 100% Outside Air (No Return Air) N = Motorized Outside Air (w/ Return Air) P = Motorized Outside Air (No Return Air) Q = Power Return + ERW (Total) Small R = Power Return + ERW (Total), Medium S = Power Return + ERW (Total), Large T = Power Return + ERW (Total), Extra Large U = Power Return + ERW (Sens), Small V = Power Return + ERW (Sens), Medium W = Power Return + ERW (Sens), Large Y = Power Return + ERW (Sens), Extra Large Z = Power Return, Plenum

1B: RETURN AIR BLOWER CONFIGURATION

0 = None A = 1 Blower, Standard Eff B = 2 Blowers, Standard Eff C = 1 Blower, Premium Eff D = 2 Blowers, Premium Eff E = 1 Blower, Premium Eff, 1 VFD F = 2 Blowers, Premium Eff, 1 VFD G = 2 Blowers, Premium Eff, 2 VFDs H = 1 Blower, Premium Eff, 1 Field Installed VFD J = 2 Blowers, Premium Eff, 1 Field Installed VFD K = 2 Blowers, Premium Eff, 2 Field Installed VFDs L = 1 Blower, Premium Eff, 1 VFD w/ Bypass M = 2 Blowers, Premium Eff, 1 VFD w/ Bypass N = 2 Blowers, Premium Eff, 2 VFDs w/ Bypass

1C: RETURN AIR BLOWER

0 = None A = 36” Axial Flow, 6 Blades B = 42” Axial Flow, 9 Blades

C = 42” Axial Flow, 12 Blades D = 48” Axial Flow, 16 Blades E = 27” Backward Curved F = 30” Backward Curved G = 33” Backward Curved H = 36.5” Backward Curved J = 42.5” Backward Curved

1D: RETURN AIR MOTOR

0 = None D = 3 hp, 1170 rpm E = 5 hp, 1170 rpm F = 7.5 hp, 1170 rpm G = 10 hp, 1170 rpm H = 15 hp, 1170 rpm J = 20 hp, 1170 rpm K = 25 hp, 1170 rpm L = 30 hp, 1170 rpm M = 40 hp, 1170 rpm N = 50 hp, 1170 rpm T = 3 hp, 1760 rpm U = 5 hp, 1760 rpm V = 7.5 hp, 1760 rpm W = 10 hp, 1760 rpm Y = 15 hp, 1760 rpm Z = 20 hp, 1760 rpm 1 = 25 hp, 1760 rpm 2 = 30 hp, 1760 rpm 3 = 40 hp, 1760 rpm 4= 50 hp, 1760 rpm

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

RL Series Feature String Nomenclature

Feature 2: OUTSIDE AIR CONTROL

0 = None A = 3 Position Actuator, Sensible B = 3 Position Actuator, Enthalpy C = Full Mod Actuator, Sensible D = Full Mod Actuator, Enthalpy E = DDC Actuator F = Constant Volume OA G = Constant Volume OA, 3 Pos Act, Sensible H = Constant Volume OA, 3 Pos Act, Enthalpy J = Constant Volume OA, Full Mod Act, Sensible K = Constant Volume OA, Full Mod Act, Enthalpy L = Constant Volume OA, DDC Act M = CO2 Override, 3 Pos Actuator, Sensible N = CO2 Override, 3 Pos Actuator, Enthalpy P = CO2 Override, Full Mod Actuator, Sensible Q = CO2 Override, Full Mod Actuator, Enthalpy R = CO2 Override, DDC Actuator S = Dual Min Pos, Full Mod Act, Sensible T = Dual Min Pos, Full Mod Act, Enthalpy U = 2 Position Actuator

Feature 3: DISCHARGE LOCATIONS

0 = Bottom Discharge A = Front Discharge B = Back Discharge C = Top Discharge D = End Discharge

Feature 4: RETURN LOCATIONS

0 = Bottom Return A = End Return B = Front Return High CFM w/o ERW or PE C = Front Return Low CFM w/o ERW or PE D = Back Return High CFM w/o ERW or PE E = Back Return Low CFM w/o ERW or PE F = Front Return High CFM w/ ERW or PE G = Front Return Low CFM w/ ERW or PE H = Back Return High CFM w/ ERW or PE J = Back Return Low CFM w/ ERW or PE

K = Bottom Return w/ RA Bypass, 2’ Box L = Bottom Return w/ RA Bypass, 4’ Box

M=Bottom Return High CFM Or w/o RA on 100% OA N=End Return High CFM w/o ERW or PE

Feature 5: SUPPLY AIR BLOWER

5A: SUPPLY AIR BLOWER CONFIGURATION

0 = 1 Blower, Standard Eff A = 2 Blowers, Standard Eff B = 3 Blowers, Standard Eff C = 4 Blowers, Standard Eff D = 1 Blower, Prem Eff E = 2 Blowers, Prem Eff F = 3 Blowers, Prem Eff G = 4 Blowers, Prem Eff H = 1 Blower, Prem Eff, w/ 1 VFD J = 2 Blowers, Prem Eff, w/ 1 VFD K = 2 Blowers, Prem Eff, w 2 VFDs L = 3 Blowers, Prem Eff, w/ 1 VFD M = 3 Blowers, Prem Eff, w/ 3 VFDs N = 4 Blowers, Prem Eff, w/ 1 VFD Q = 4 Blowers, Prem Eff, w/ 4 VFDs R = 4 Blowers, Prem Eff, w/ 2 VFDs S = 1 Blower, Prem Eff, w/ 1 Field Installed VFD T = 2 Blowers, Prem Eff, w/ 1 Field Installed VFD U = 2 Blowers, Prem Eff, w/ 2 Field Installed VFDs V = 3 Blowers, Prem Eff, w/ 1 Field Installed VFD W = 3 Blowers, Prem Eff, w/ 3 Field Installed VFDs Y = 4 Blowers, Prem Eff, w/ 1 Field Installed VFD Z = 4 Blowers, Prem Eff, w/ 4 Field Installed VFDs 1 = 4 Blowers, Prem Eff, w/ 2 Field Installed VFDs 2 = 1 Blower, Prem Eff, w/ 1 VFD w/ Bypass 3 = 2 Blowers, Prem Eff, w/ 1 VFD w/ Bypass 4 = 2 Blowers, Prem Eff, w 2 VFDs w/ Bypass 5 = 3 Blowers, Prem Eff, w/ 1 VFD w/ Bypass 6 = 3 Blowers, Prem Eff, w/ 3 VFDs w/ Bypass 7 = 4 Blowers, Prem Eff, w/ 1 VFD w/ Bypass 8 = 4 Blowers, Prem Eff, w/ 4 VFDs w/ Bypass 9 = 4 Blowers, Prem Eff, w/ 2 VFDs w/ Bypass

RL Series Feature String Nomenclature

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

Feature 5: SUPPLY AIR BLOWER

5B: SUPPLY AIR BLOWER

A = 27” Backward Curved B = 30” Backward Curved C = 33” Backward Curved D = 36.5” Backward Curved E = 42.5” Backward Curved F = 27” Backward Curved w/ Damper G = 30” Backward Curved w/ Damper H = 33” Backward Curved w/ Damper J = 36.5” Backward Curved w/ Damper K = 42.5” Backward Curved w/ Damper

5C: SUPPLY AIR MOTOR

D = 3 hp, 1170 rpm E = 5 hp, 1170 rpm F = 7.5 hp, 1170 rpm G = 10 hp, 1170 rpm H = 15 hp, 1170 rpm J = 20 hp, 1170 rpm K = 25 hp, 1170 rpm L = 30 hp, 1170 rpm M = 40 hp, 1170 rpm N = 50 hp, 1170 rpm T = 3 hp, 1760 rpm U = 5 hp, 1760 rpm V = 7.5 hp, 1760 rpm W = 10 hp, 1760 rpm Y = 15 hp, 1760 rpm Z = 20 hp, 1760 rpm 1 = 25 hp, 1760 rpm 2 = 30 hp, 1760 rpm 3 = 40 hp, 1760 rpm 4 = 50 hp, 1760 rpm

Feature 6: FILTERS

6A: PRE FILTER TYPE

0 = 2” Pleated, 30% Eff, Std Pos A = 4” Pleated, 30% Eff, Std Pos B = 2” Perm Filter with Replaceable Media, Std Pos C = 2” Ple Pre, 30% Eff/12” Cart, 65% Eff, Std Pos D = 2” Ple Pre, 30% Eff/12” Cart, 85% Eff, Std Pos E = 2” Ple Pre, 30% Eff/12” Cart, 95% Eff, Std Pos F = 4” Ple Pre, 30% Eff/12” Cart, 65% Eff, Std Pos G = 4” Ple Pre, 30% Eff/12” Cart, 85% Eff, Std Pos H = 4” Ple Pre, 30% Eff/12” Cart, 95% Eff, Std Pos J = 2” Ple Pre, 30% Eff/30” Bag, 85% Eff, Std Pos K = 2” Ple Pre, 30% Eff/30” Bag, 95% Eff, Std Pos L = 4” Ple Pre, 30% Eff/30” Bag, 85% Eff, Std Pos M = 4” Ple Pre, 30% Eff/30” Bag, 95% Eff, Std Pos N = 2” Pleated, 30% Eff, Pre Pos P = 4” Pleated, 30% Eff, Pre Pos Q = 2” Perm Filter with Replaceable Media, Pre Pos R = 2” Ple Pre, 30% Eff/12” Cart, 65% Eff, Pre Pos S = 2” Ple Pre, 30% Eff/12” Cart, 85% Eff, Pre Pos T = 2” Ple Pre, 30% Eff/12” Cart, 95% Eff, Pre Pos U = 4” Ple Pre, 30% Eff/12” Cart, 65% Eff, Pre Pos V = 4” Ple Pre, 30% Eff/12” Cart, 85% Eff, Pre Pos W = 4” Ple Pre, 30% Eff/12” Cart, 95% Eff, Pre Pos Y = 2” Ple Pre, 30% Eff/30” Bag, 85% Eff, Pre Pos Z = 2” Ple Pre, 30% Eff/30” Bag, 95% Eff, Pre Pos 1 = 4” Ple Pre, 30% Eff/30” Bag, 85% Eff, Pre Pos 2 = 4” Ple Pre, 30% Eff/30” Bag, 95% Eff, Pre Pos

6B: FINAL FILTER TYPE

0 = None

A = 12” Cart, 85% Eff, Filter Box A B = 12” Cart, 85% Eff, Filter Box B C = 12” Cart, 85% Eff, Filter Box C D = 12” Cart, 95% Eff, Filter Box A E = 12” Cart, 95% Eff, Filter Box B F = 12” Cart, 95% Eff, Filter Box C G = 30” Bag, 85% Eff, Filter Box A H = 30” Bag, 85% Eff, Filter Box B J = 30” Bag, 85% Eff, Filter Box C K = 30” Bag, 95% Eff, Filter Box A L = 30” Bag, 95% Eff, Filter Box B M = 30” Bag, 95% Eff, Filter Box C

N = Pre Filter Box A - No Final Filter P = Pre Filter Box B - No Final Filter Q = Pre Filter Box C - No Final Filter

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

RL Series Feature String Nomenclature

Feature 6: FILTERS

6C: FILTER OPTIONS

0 = Standard - None A = Clogged Filter Switch, Pre Filters B = Clogged Filter Switch, Final Filters C = Magnehelic Gauge, Pre Filters D = Magnehelic Gauge, Final Filters E = Option A + B F = Option A + C G = Option A + D H = Option B + C J = Option B + D K = Option A + B + C L = Option A + B + D M = Option A + C + D N = Option B + C + D P = Option A + B + C + D

Feature 7: REFRIGERATION CONTROL

0 = Standard A = 5 Min TDR Off B = 20 Sec TDR C = 115V Outlet, Field Wired D = 115V Outlet, Factory Wired E = Option A + B F = Option A + C G = Option A + D H = Option A + B + C J = Option A + B + D K = Option B + C L = Option B + D

Feature 8: REFRIGERATION OPTIONS

0 = Standard A = Hot Gas Bypass Lead Stage B = Hot Gas Reheat C = Modulating Hot Gas Reheat D = Hot Gas Bypass Lead and Lag Stages E = Option A + B F = Option A + C G = Option B + D H = Option C + D J = Sub-cooling Coil, Reheat Position K = Option A + J L = Option D + J

Feature 9: REFRIGERATION ACCESSORIES

0 = Standard A = Sight Glass B = Compressor Isolation Valves C = Options A + B D = Condenser Fan VFD's E = Options A + D F = Options B + D G = Options A + B + D

Feature 10: POWER OPTIONS

0 = Standard Power Block A = Power Switch (225 Amps) B = Power Switch (400 Amps) C = Power Switch (600 Amps) D = Power Switch (800 Amps) E = Power Switch (1200 Amps)

Feature 11: SAFETY OPTIONS

0 = Standard A = RA and SA Firestat B = RA Smoke Detector C = SA Smoke Detector D = Options B + C E = Options A + B F = Options A + C G = Options A + D H = SA High Static Pressure Switch J = Options A+H K = Options B+H L = Options C+H M = Options B+C+H N = Options A+B+H P = Options A+C+H Q = Options A+B+C+H

RL Series Feature String Nomenclature

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

Feature 12: CONTROLS

0 = Standard, Terminal Block A = Low Limit Controls B = Phase and Brown Out Protection C = ERW Defrost D = ERW Rotation Detection F = Option A + B G = Option A + C H = Option A + D K = Option B + C L = Option B + D N = Option C + D Q = Option A + B + C R = Option A + B + D T = Option A + C + D V = Option B + C + D Y = Option A + B + C + D

Feature 13: SPECIAL CONTROLS

0 = Standard D = VAV Unit Controller E = Constant Volume Unit Controller F = MakeUp Air Unit Controller H = Field Installed DDC Control by Others J = Factory Installed DDC Controls by Others 5 = Field Installed DDC Controls w/ iso relays 6 = Factory Installed DDC Controls by other w/ relays

Feature 14: PREHEAT

14A: PREHEAT CONFIGURATION

0 = No Preheat C = Hot Water Coil, OA Preheat D = Steam Distributing Coil, OA Preheat E = Hot Water Coil, Preheat 4ft Box F = Steam Distributing Coil, Preheat 4ft Box

14B: PREHEAT SIZING

0 = No Preheat A = Heat Qty A B = Heat Qty B C = Heat Qty C D = Heat Qty D

Feature 15: OPTION BOXES

0 = Standard A = 2 ft Box After Heat B = 2 ft Box After Cooling C = 2 ft Box After Pre Filter D = 2 ft Box After Return E = 4 ft Box After Heat F = 4 ft Box After Cooling G = 4 ft Box After Pre Filter H = 4 ft Box After Return J = 6 ft Box After Heat K = 6 ft Box After Cooling L = 6 ft Box After Pre Filter M = 6 ft Box After Return N = 8 ft Box After Heat P = 8 ft Box After Cooling Q = 8 ft Box After Pre Filter R = 8 ft Box After Return S = 2 ft Box After Preheat Coil T = 4 ft Box After Preheat Coil U = 6 ft Box After Preheat Coil V = 8 ft Box After Preheat Coil

Feature 16: INTERIOR CABINET OPTIONS

0 = Standard B = Marine Service Lights

Feature 17: CABINET OPTIONS

0 = Standard A = Access Door Windows B = Burglar Bars C = Perf Liner, SA Plenum D = Perf Liner, RA Plenum F = Option A + B G = Option A + C H = Option A + D K = Option B + C L = Option B + D N = Option C + D Q = Option A + B + C R = Option A + B + D T = Option A + C + D V = Option B + C + D Y = Option A + B + C + D

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

RL Series Feature String Nomenclature

Feature 18: CUSTOMER CODE

0 = None

Feature 19: CODE OPTIONS

0 = Standard ETL USA Listing A = MEA, New York B = Chicago Code, Cool and Gas C = Chicago Code, Cool and Electric D = Chicago Code, Cool Only E = Chicago Code, Gas Only F = Chicago Code, Electric Only G = Chicago Code, No Cool No Heat H = ETL USA + Canada Listing

Feature 20: CRATING

0 = Standard, One Piece Unit A = Two Piece Unit

Feature 21: EVAPORATIVE-COOLED AND WATER-COOLED CONDENSER

0 = None A = No Sump or Vest Heaters B = Sump and Vest Heaters C = Balancing Valves D = Single Point Water Connection E = Condenser Vest Heater F = Motorized Shutoff Valves G = Head Pressure Control H = Option C + D J = Option C + E K = Option C + F L = Option C + G M = Option D + E N = Option D + F P = Option D + G Q = Option E + F R = Option E + G S = Option F + G T = Option C + D + E U = Option C + D + F V = Option C + D + G W = Option D + E + F Y = Option D + E + G Z = Option E + F + G 1 = Option C + D + E + F 2 = Option C + D + E + G 3 = Option C + D + F + G 4 = Option C + E + F + G 5 = Option C + D + E + F + G

RL Series Feature String Nomenclature

SIZE

VLT

CONFIGA1A2A3A4B1B2B31A1B1C1D2345A5B5C6A6B6C7891011121314A

14B1516171819202122

– 1 0 0 – 3 – 0 –

0 6 – 3 5 2 :

BEB

E–D

0 0 –QF

Y–P0A

– 0

DBB

0 0 0 – 0 0 – 0

0 0

B0B

GEN

Model Options

Unit Feature Options

Feature 22: CONTROL VENDORS

0 = None A = WattMaster Orion Controls System B = JENEsys Controls System C = WattMaster Orion Controls System with Specials D = JENEsys Controls System with Specials E = MCS Controls F = MCS Controls w/ diagnostics G = MCS Controls w/ modem H = MCS Controls w/ diagnostics and modem J = MCS Controls w/ diagnostics and touchscreen interface K = MCS Controls w/ diagnostics, touchscreen, modem L = Option E with BACnet IP, Modbus, N2 M = Option F with BACnet IP, Modbus, N2 N = Option G with BACnet IP, Modbus, N2 P = Option H with BACnet IP, Modbus, N2 Q = Option J with BACnet IP, Modbus, N2 R = Option K with BACnet IP, Modbus, N2 S = Option E with BACnet MSTP T = Option F with BACnet MSTP U = Option G with BACnet MSTP V = Option H with BACnet MSTP W = Option J with BACnet MSTP Y = Option K with BACnet MSTP Z = Option E with Lontalk 1 = Option F with Lontalk 2 = Option G with Lontalk 3 = Option H with Lontalk 4 = Option J with Lontalk 5 = Option K with Lontalk

Feature 23: TYPE

B = Standard Paint U = Special Pricing Authorization with Special Paint X = Special Pricing Authorization with Standard Paint

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.

WARNING

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.

CAUTION

General Information

RL Series packaged rooftop and outdoor air handling units have been designed for outdoor installation only.

Certification of Gas Heat Models

a. Certified as a forced air furnace with or

without cooling.

b. Certified for outdoor installation only. c. Certified for installation on combustible

roof with a minimum of 12” high curb.

d. Certified with heat exchanger located

downstream of evaporator coil.

Certification of Steam or Hot Water Heat Models

a. Certified as a forced air furnace with or

without cooling unit.

b. Certified for outdoor installation only. c. Certified for installation on combustible

roof with a minimum of 12” high curb.

Certification of Electric Heat Models

a. Certified as an electric warm air furnace

with or without cooling unit.

b. Certified for outdoor installation only. c. Certified for installation on combustible

roof with a minimum of 12” high curb.

Certification of Cooling Models

a. Certified as a commercial central air

conditioner with or without electrically operated compressors.

b. Certified for outdoor installation only. c. Certified for installation on combustible

roof with a minimum of 12” high curb.

d. Certified with refrigerant R-410A coils

or with chilled water cooling coils.

Codes and Ordinances

RL Series units have been tested and certified, by ETL, in accordance with UL Safety Standard 1995/CSA C22.2 No. 236, ANSI Safety Standard Z83.8-2006/CSA 2.62006, ANSI Z83.4-2004, and ANSI Z83.18-

2004.

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

Installation of RL Series units must conform to the International Code Council (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 current National Fuel Code ANSI Z223.1/NFPA 54 or the National Gas & Propane Installation Code CSA B149.1, and CSA B52 Mechanical Refrigeration Code. All appliances must be electrically grounded in accordance with local codes, or in the absence of local codes, the National Electric Code, ANSI/NFPA 70, and/or the Canadian Electrical Code CSA C22.1.

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.

CAUTION

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

WARNING

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

WARNING

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.

CAUTION

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.

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.

Packaged Direct Expansion (DX) Units

All DX refrigeration systems are factory assembled, leak tested, charged with refrigerant, and run tested.

All refrigerant systems include evaporator and condenser coils. Each unit includes liquid line filter driers, thermal expansion valves (TXV), and scroll compressors. Compressors are equipped with a positive pressure forced lubrication system.

Never turn 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 may 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 liquid enters the compressor.

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 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

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.

CAUTION

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 emergency or complete shutdown of the unit.

During the cooling season, if the airflow 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.

Compressor life will be 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 or the 0°F low ambient option, will not operate in the cooling mode of operation properly when the outdoor temperature is below 55°F. Low ambient and/or economizer options are recommended if cooling operation below 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 airflow. If this amount of air is reduced the gas heat exchanger or electric heating coil may overheat, and may turn 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 blower 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.

Wiring Diagrams

Unit specific wiring diagrams in both ladder and point-to-point form 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. Units include drain pan connections on both the front and back sides of the unit. Condensate drain pipes or p-traps for each connection are factory supplied and shipped loose in the controls compartment for field installation. However, unit may require a deeper p-trap depending on the type of unit and pressure at the coil. See Installation section of this manual for more information.

If codes require a condensate drain line, the

Location

Clearance

Front

100”

Back

100”

Left End

100”

Right End

100”

Top

Unobstructed

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

CAUTION

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

WARNING

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.

Installation

AAON equipment is designed to be easily installed and serviced.

Locating Units

The curb should be mounted first and must be located so that duct connections will be clear of structural members of the building.

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.

Table 1 - Unit Clearances

Figure 1 - RL Series Unit Orientation

Condenser coils and fans must be free of any obstructions in order to start and operate properly with a correct amount of airflow.

For proper unit operation, the immediate area around the condenser must remain free of debris that may be drawn in and obstruct airflow in the condensing section.

Consideration must be given to obstruction caused by snow accumulation when placing the unit.

Curb Installation

Make openings in the roof decking large enough to allow for duct penetrations and workspace only. Do not make openings larger than necessary. Set the curb to coincide with the openings. Make sure curb is level.

Unit specific curb drawing is included with job submittal. See SMACNA Architectural

Sheet Metal Manual and HVAC Duct Construction Standards for curb installation

details.

All roofing work should be performed by competent roofing contractors to avoid any possible leakage.

CAUTION

Where the supply or warm air duct passes through a combustible roof, a clearance of 1 inch must be maintained between the outside edges of the duct and combustible material in accordance with National Fire Protection Association Standard No. 90A. Provide flashings or enclosure between structure and roof and all joints must be sealed with mastic roofing to ensure a watertight seal.

CAUTION

For horizontal return and discharge applications, total height of mounting rail and unit base rail must be high enough so that adequate condensate drain p-trap can be included. Units require steel mounting rail support along all four sides of the unit base.

When installed at ground level, a one-piece concrete slab should be used with footings that extend below the frost line. Care must also be taken to protect the coil and fins from damage due to vandalism or other causes.

If unit is elevated a field supplied catwalk is recommended to allow access to unit service doors.

This unit ships with a curb gasket that is

1¼” wide and 1½” tall. It is recommended

that this or another similar gasket be used between the curb and the unit to reduce vibration from the unit to the building.

Duct Connection

Figure 2 - Curb Mounting

Figure 3 - Curb Detail

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