AAON RN Series Owner's manual

RN SERIES
Packaged Rooftop Units, Heat Pumps,
& Outdoor Air Handling Units
Installation, Operation,
& Maintenance
oDo not store gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance
oWHAT 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 your 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.
oStartup and service must be performed by a
Factory Trained Service Technician.
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.
WARNING

3
Table of Contents
Safety .............................................................................................................................................. 8
RN Series Feature String Nomenclature....................................................................................... 13
General Information...................................................................................................................... 24
Codes and Ordinances .............................................................................................................. 24
Receiving Unit.......................................................................................................................... 25
Packaged Direct Expansion (DX) Units................................................................................... 26
Gas or Electric Heating............................................................................................................. 27
Wiring Diagrams....................................................................................................................... 28
Condensate Drain Pan............................................................................................................... 28
Installation..................................................................................................................................... 29
Locating Units........................................................................................................................... 29
Setting the Curb........................................................................................................................ 30
Forklifting the Unit (6-25 and 30 ton)...................................................................................... 36
Lifting the Unit ......................................................................................................................... 36
Duct Connection....................................................................................................................... 39
Seismic Curb Installation.......................................................................................................... 40
Outside Air Rain Hood............................................................................................................. 44
End Flashing Installation.......................................................................................................... 45
Metal Mesh Filters (6-25 and 30 ton Units) ............................................................................. 46
Electrical................................................................................................................................... 47
Variable Speed Compressors................................................................................................ 49
Thermostat Control Wiring................................................................................................... 49
Gas Heating............................................................................................................................... 50
Piping Sizing Examples........................................................................................................ 51
Inlet and Manifold Pressures ................................................................................................ 52
Gas Pressure Regulator & Overpressure Protection Device................................................. 52
Piping Supports..................................................................................................................... 52
Additional Gas Piping Considerations.................................................................................. 52
Leak Testing.......................................................................................................................... 53
Refrigerant-to-Water Heat Exchanger...................................................................................... 54
Water-Source Heat Pump Applications................................................................................ 54
Open Loop Applications....................................................................................................... 54
Freezing Water in the Heat Exchanger................................................................................. 55
Water Piping ......................................................................................................................... 56
Condensate Drain Piping .......................................................................................................... 58
Heating Coils ............................................................................................................................ 59
Chilled Water Coil.................................................................................................................... 59
Electric Preheat......................................................................................................................... 60
Status Display Screens.......................................................................................................... 60
System Setting Screens......................................................................................................... 61
LED Flash Alarm Codes....................................................................................................... 63
Operation............................................................................................................................... 63
Energy Recovery Units............................................................................................................. 64
Startup........................................................................................................................................... 72
Supply Fans............................................................................................................................... 72

4
Power Return Axial Flow Fans (16-25 and 30 tons)................................................................ 73
Power Return and Exhaust Axial Flow Fans (26 and 31-140 tons).......................................... 75
Filters........................................................................................................................................ 76
Adjusting Refrigerant Charge................................................................................................... 76
Checking Liquid Sub-Cooling.............................................................................................. 77
Checking Evaporator Superheat ........................................................................................... 77
Adjusting Sub-cooling and Superheat Temperatures............................................................ 78
Gas Heater Instructions............................................................................................................. 80
Condenser Fan Electronically Commutated Motor (ECM) Startup ......................................... 81
VFD Controlled Condenser Fan Startup................................................................................... 82
Operation....................................................................................................................................... 83
Thermostat Operation............................................................................................................... 83
Packaged DX Cooling Operation and Control ......................................................................... 83
Gas Heater Operation................................................................................................................ 83
Electric Heating Operation ....................................................................................................... 84
Steam or Hot Water Preheating and Heating Operation........................................................... 84
Modulating Electric Preheat ..................................................................................................... 84
Chilled Water or Non-Compressorized DX Cooling Operation............................................... 84
Maintenance.................................................................................................................................. 85
Gas Heating............................................................................................................................... 85
Gas Heat Exchanger Removal.................................................................................................. 86
DX Cooling............................................................................................................................... 86
Condenser Fans (6-25 and 30 ton)............................................................................................ 86
Condensate Drain Pans............................................................................................................. 87
Evaporator Coil (6-25 and 30 ton)............................................................................................ 88
Brazed Plate Heat Exchanger Cleaning.................................................................................... 88
E-Coated Coil Cleaning............................................................................................................ 89
Microchannel Coil Cleaning..................................................................................................... 90
Supply Fans............................................................................................................................... 91
Phase and Brownout Protection................................................................................................ 92
Variable Capacity Compressor Controller................................................................................ 93
Filter Replacement.................................................................................................................... 94
Replacement Parts................................................................................................................... 102
Appendix A - Heat Exchanger Corrosion Resistance................................................................. 103
Appendix B - Thermistor Temperature vs. Resistance Values................................................... 105
RN Series Startup Form.............................................................................................................. 106
Maintenance Log ........................................................................................................................ 110
Literature Change History........................................................................................................... 111
R90721 · Rev. B · 140725

5
Index of Tables and Figures
Tables:
Table 1 - Electric and Gas Heating Capacities ............................................................................. 27
Table 2 - A Cabinet Unit Clearances............................................................................................ 29
Table 3 - B Cabinet Unit Clearances ............................................................................................ 29
Table 4 - C Cabinet Unit Clearances ............................................................................................ 29
Table 5 - D Cabinet Unit Clearances............................................................................................ 30
Table 6 - E Cabinet Unit Clearances............................................................................................. 30
Table 7 - Variable Speed Compressor VFD Frequency Range.................................................... 49
Table 8 - Control Wiring............................................................................................................... 49
Table 9 - 6-8 and 10 ton Gas Connections.................................................................................... 50
Table 10 - 9 and 11-15 ton Gas Connections................................................................................ 50
Table 11 - 16-25 and 30 ton.......................................................................................................... 50
Table 12 - 26 and 31-70 ton.......................................................................................................... 50
Table 13 - 55, 65 and 75-140 ton Gas Connections...................................................................... 51
Table 14 - Natural Gas (ft3/hr) Maximum Piping Capacities....................................................... 51
Table 15 - Propane (kBtu/hr) Maximum Piping Capacities ......................................................... 51
Table 16 - Gas Piping Supports.................................................................................................... 52
Table 17 - Glycol Freezing Points................................................................................................ 56
Table 18 - Standard Brazed Plate Heat Exchanger Water Connections....................................... 57
Table 19 - SMO 254 Brazed Plate Heat Exchanger Water Connections...................................... 57
Table 20 - Steam Coil Connection Sizes ...................................................................................... 59
Table 21 - Hot Water Coil Connection Sizes................................................................................ 59
Table 22 - Chilled Water Coil Connection Sizes.......................................................................... 59
Table 23 - Stages of Electric Preheat............................................................................................ 62
Table 24 - Pin Location................................................................................................................. 75
Table 25 - Pin Groove Location.................................................................................................... 75
Table 26 - Acceptable Refrigeration............................................................................................. 78
Table 27 - R-410A and R-22 Refrigerant Temperature-Pressure Chart....................................... 79
Table 28 - ECM Condenser Fan Cycling Options........................................................................ 81
Table 29 - Demand Signal vs. Compressor Capacity Modulation................................................ 94
Table 30 - 6-8 and 10 ton Pre Filters ............................................................................................ 95
Table 31 - 9 and 11-15 ton Pre Filters.......................................................................................... 95
Table 32 - 16-25 and 30 ton Pre Filters ........................................................................................ 95
Table 33 - 26, 31, and 40 ton Pre Filters....................................................................................... 95
Table 34 - 50, 60, and 70 ton Pre Filters....................................................................................... 96
Table 35 - 55, 65, and 75 ton Pre Filters....................................................................................... 96
Table 36 - 90-140 ton Pre Filters.................................................................................................. 96
Table 37 - 26, 31-50, 60, and 70 ton Preheat Filters..................................................................... 97
Table 38 - 6-8 and 10 ton Unit Filters........................................................................................... 97
Table 39 - 9 and 11 ton Unit Filters.............................................................................................. 97
Table 40 - 13 and 15 ton Unit Filters............................................................................................ 98
Table 41 - 16-25 and 30 ton Unit Filters....................................................................................... 98

6
Table 42 - 26, 31, and 40 ton Unit Filters..................................................................................... 99
Table 43 - 50, 60, and 70 ton Unit Filters..................................................................................... 99
Table 44 - 55, 65, and 75 ton Unit Filters..................................................................................... 99
Table 45 - 90-140 ton Unit Filters .............................................................................................. 100
Table 46 - 6-8 and 10 ton Energy Recovery Wheel Filters ........................................................ 100
Table 47 - 9 and 11-15 ton Energy Recovery Wheel Filters ...................................................... 100
Table 48 - 16-25 and 30 ton Energy Recovery Wheel Filters .................................................... 100
Table 49 - 26, 31-50, 60, and 70 ton Energy Recovery Wheel Filters ....................................... 101
Table 50 - 55, 65, and 75-140 ton Energy Recovery Wheel Filters ........................................... 101
Figures:
Figure 1 - Lockable Handle .......................................................................................................... 25
Figure 2 - RN Series A, B and C Cabinet,.................................................................................... 30
Figure 3 - RN Series D Cabinet,................................................................................................... 30
Figure 4 - RN Series E Cabinet,.................................................................................................... 30
Figure 5 - RN Series 6-8 and 10 ton Unit Gasket Locations........................................................ 32
Figure 6 - RN Series 9 and 11-15 ton Unit Gasket Locations...................................................... 33
Figure 7 - RN Series 16-25 and 30 ton Unit Gasket Locations.................................................... 34
Figure 8 - RN Series 26, 31-50, 60, and 70 ton Unit Gasket Locations....................................... 35
Figure 9 - Forklifting an RN Series A, B and C Cabinet, 6-25 and 30 tons................................. 36
Figure 10 - Lifting Details of a 6-25 and 30 ton Standard or Power Exhaust Unit...................... 37
Figure 11 - Lifting Details of a 6-25 and 30 ton Energy Recovery Wheel or Power Return Unit37
Figure 12 - Lifting Details of a 26, 31-50, 60 and 70 ton Unit..................................................... 38
Figure 13 - Lifting Details of a 55, 65 and 75-140 ton Unit......................................................... 38
Figure 14 - Duct Connection......................................................................................................... 39
Figure 15 - Solid Bottom Seismic Curb with Filters .................................................................... 40
Figure 16 - Seismic Solid Bottom Curb without Filters Cross Section........................................ 41
Figure 17 - Seismic Solid Bottom Curb without Filters Detail A................................................. 41
Figure 18 - Seismic Solid Bottom Curb without Filters Detail B................................................. 41
Figure 19 - Seismic Rigid Mount Curb......................................................................................... 42
Figure 20 - 90-140 ton Condenser Coil Guard Installation Instructions 1 ................................... 43
Figure 21 - 90-140 ton Condenser Coil Guard Installation Instructions 2 ................................... 44
Figure 22 - 6-25 and 30 ton........................................................................................................... 45
Figure 23 - 6-25 and 30 ton........................................................................................................... 45
Figure 24 - 26 and 31-140 ton....................................................................................................... 45
Figure 25 - Factory Supplied End Flashings................................................................................. 46
Figure 26 - Rain Hood with Metal Mesh Filter Rack Installation................................................ 46
Figure 27 - Unit Utility Entry ....................................................................................................... 47
Figure 28 - Back View of Power Switch from Compressor and Control Compartment (6-50, 60,
and 70 ton Units)........................................................................................................................... 47
Figure 29 - Front View of Utility Entry and Power Switch from Control Compartment (55, 65
and 75-140 ton Units) ................................................................................................................... 48
Figure 30 - RN Series Gas Heat Exchanger.................................................................................. 51
Figure 31 - Example 6-25 and 30 ton through the Base Gas Piping............................................. 53
Figure 32 - Preheat Controller ...................................................................................................... 60
Figure 33 - Supply Fan Banding................................................................................................... 73

7
Figure 34 - Fan with the HUB on the Top and RET on the Bottom............................................. 74
Figure 35 - Bushing Mount Location............................................................................................ 74
Figure 36 - RET with Pin in Groove 4.......................................................................................... 74
Figure 37 - Fan HUB and RET Castings ...................................................................................... 74
Figure 38 - Assembled Fan........................................................................................................... 75
Figure 39 - Back of the Fan .......................................................................................................... 75
Figure 40 - Pin Groove Location.................................................................................................. 76
Figure 41 - Pitch Pin Location...................................................................................................... 76
Figure 42 - Example Pitch Pin...................................................................................................... 76
Figure 43 - Gas Heater Instructions.............................................................................................. 80
Figure 44 - Gas Heat Exchanger................................................................................................... 86
Figure 45 - Removal of a Condenser Fan Assembly.................................................................... 87
Figure 46 - Evaporator Coil Access.............................................................................................. 88
Figure 47 - 9-25 and 30 ton Supply Fan....................................................................................... 91
Figure 48 - Bolts which Connect Motor Mount to Blower Fan.................................................... 91
Figure 49 - Voltage Monitor......................................................................................................... 92
Figure 50 - Variable Capacity Compressor Controller................................................................. 93
Figure 51 - Compressor Controller Flash Code Details................................................................ 94
Figure 52 - RN Series 6-50, 60, and 70 ton Standard Filter Layouts ......................................... 101
Figure 53 - RN Series 55, 65, 70-140 ton Standard Filter Layouts............................................ 102

8
Safety
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
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, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings
exactly could re
sult 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
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.

9
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
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
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
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
FIRE, EXPLOSION OR CARBON
MONOXIDE POISONING HAZARD
Failure to replace proper controls
could result in fire, explosion, or
carbon monoxide poisoning. Failure
to follow sa
fety 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

10
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
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
Failure to properly drain and vent
coils when not in use during freezing
temperature may result in coil and
equipment damage.
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
Electric motor over-current protection
and overload protection may be a
function of th
e 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
motor’s FLA rating as shown on the
motor nameplate.
CAUTION

11
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
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-wate
r heat exchanger.
See Appendix A - Heat Exchanger
Corrosion Resistance for more
information.
CAUTION
Door compartments containing
hazardous voltage or rotating parts
are equipped wit
h 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
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
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
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
Always use a pressure regulator,
valves and gau
ges 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

12
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
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 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.
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.
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
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.
WARNING
WARNING

13
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–
025
– 3
–
0 –
B
B
0 2
– 3 8 4 :
A
000
–
D
0
B
–
D
E
H
–
0
B
A
–
0
D
0000
L
–
0 0
–
0 0
B
00000
B
GEN
Model Options
Unit Feature Options
BASE MODEL
RN
SERIES AND GENERATION
006 = 6 ton Capacity
UNIT SIZE
007 = 7 ton Capacity
008 = 8 ton Capacity
009 = 9 ton Capacity
010 = 10 ton Capacity
011 = 11 ton Capacity
013 = 13 ton Capacity
015 = 15 ton Capacity
016 = 16 ton Capacity
018 = 18 ton Capacity
020 = 20 ton Capacity
025 = 25 ton Capacity
026 = 26 ton Capacity
030 = 30 ton Capacity
031 = 31 ton Capacity
040 = 40 ton Capacity
050 = 50 ton Capacity
055 = 55 ton Capacity
060 = 60 ton Capacity
065 = 65 ton Capacity
070 = 70 ton Capacity
075 = 75 ton Capacity
090 = 90 ton Capacity
105 = 105 ton Capacity
120 = 120 ton Capacity
130 = 130 ton Capacity
140 = 140 ton Capacity
1 = 230V/1Φ/60Hz
VOLTAGE
2 = 230V/3Φ/60Hz
3 = 460V/3Φ/60Hz
4 = 575V/3Φ/60Hz
6 = 380V/3Φ/50Hz
8 = 208V/3Φ/60Hz
9 = 208V/1Φ/60Hz
0 = Standard - Vertical Discharge and Return
INTERIOR PROTECTION
A = Interior Corrosion Protection - Vertical
Discharge and Return
Model Option A: COOLING/HEAT
PUMP
0 = Air Handling Unit
A1: REFRIGERANT STYLE
B = R-410A - High Efficiency
C = R-410A - Standard Efficiency
E = R-410A Variable Capacity Scroll Compressor -
High Efficiency
F = R-410A Variable Capacity Scroll Compressor -
Standard Efficiency
J = R-410A VFD Compatible Scroll Compressor
K = R-410A VFD Compatible Scroll Compressor +
Microchannel Condenser
0 = No Cooling
A2: UNIT CONFIGURATION
A = Air-Cooled Cond. + Std Evap. Coil
B = Air-Cooled Cond. + 6 Row Evap. Coil
J = Water-Cooled Cond. + Std Evap. Coil
K = Water-Cooled Cond. + 6 Row Evap. Coil
P = Air-Cooled Cond. + 6 Row Evap. Coil + Mixed
Air Bypass
Q = Air-Cooled Cond. + 6 Row Evap. Coil + Return
Air Bypass
R = Water-Cooled Cond. + 6 Row Evap. Coil +
Return Air Bypass
T = Water-Cooled Cond. + 6 Row Evap. Coil +
Mixed Air Bypass
U = Chilled Water Coil - 4 Row
W = Chilled Water Coil - 6 Row
2 = Non-Compressorized + Std Evap. Coil
4 = Non-Compressorized + 6 Row Evap. Coil
6 = Air-Source Heat Pump
7 = Water-Source/Geothermal Heat Pump

14
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–
025
– 3
–
0 –
B
B
0 2
– 38 4 :
A
000
–
D
0
B
–
D
E
H
–
0
B
A
–
0
D
0000
L
–
0 0
–
0 0
B
00000
B
GEN
Model Options
Unit Feature Options
Model Option A: COOLING/HEAT
PUMP
0 = Standard
A3: COIL COATING
1 = Polymer E-Coated Evap. and Cond.
2 = Stainless Steel Casing Evap and Cond
8 = Polymer E-Coated Cond.
9 = Polymer E-Coated Cooling Coil
A = Stainless Steel Evap. Coil Casing + Polymer E-
Coated Cond. Coil
B = Stainless Steel Casing Cond & Polymer E-
Coated Cooling Coil
C = Stainless Steel Casing Cond. Only
D = Stainless Steel Cooling Coil Casing
0 = No Cooling
A4: COOLING/HEAT PUMP STAGING
1 = 1 Stage
2 = 2 Stage
4 = 4 Stage
9 = Modulating - Lead VCC
A = Modulating - All VCC
B = 1 Stage + 1 Stage Auxiliary Heat
C = 2 Stage + 1 Stage Auxiliary Heat
D = 4 Stage + 1 Stage Auxiliary Heat
E = Modulating - Lead VCC + 1 Stage Aux. Heat
F = Modulating - All VCC + 1 Stage Aux. Heat
H = Single Serpentine 8 fpi
J = Half Serpentine 8 fpi
K = Single Serpentine 10 fpi
L = Half Serpentine 10 fpi
M = Single Serpentine 12 fpi
N = Half Serpentine 12 fpi
P = 1 Stage + 2 Stage Auxiliary Heat
Q = 2 Stage + 2 Stage Auxiliary Heat
R = 4 Stage + 2 Stage Auxiliary Heat
S = Modulating - Lead VCC + 2 Stage Aux. Heat
T = Modulating - All VCC + 2 Stage Aux. Heat
U = 1 Stage + 4 Stage Auxiliary Heat
V = 2 Stage + 4 Stage Auxiliary Heat
W = 4 Stage + 4 Stage Auxiliary Heat
Y = Modulating - Lead VCC + 4 Stage Aux. Heat
Z = Modulating - All VCC + 4 Stage Aux. Heat
Model Option B: HEATING
0 = No Heating
B1: HEATING TYPE
1 = Electric Heat
2 = Natural Gas Aluminized
3 = Natural Gas Stainless Steel
4 = High Altitude Natural Gas Aluminized
5 = High Altitude Natural Gas Stainless Steel
6 = LP Gas Aluminized
7 = LP Gas Stainless Steel
8 = High Altitude LP Gas Aluminized
9 = High Altitude LP Gas Stainless Steel
C = Steam Distributing Standard
D = Steam Distributing Polymer E-Coated
E = Hot Water Standard
F = Hot Water Polymer E-Coated

15
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–025–3–0–
B
B
0 2 –38 4 :
A
000–
D
0
B
–
D
E
H
–0
B
A
–0
D
0000
L
–0 0 –0 0
B
00000
B
GEN
Model Options
Unit Feature Options
0 = No Heating
B2: HEATING DESIGNATION
1 = Heat 1
2 = Heat 2
3 = Heat 3
4 = Heat 4
6 = Heat 6
7 = Heat 7
8 = Heat 8
9 = Heat 9
A = Heat A
B = Heat B
C = Heat C
D = Heat D
E = Heat E
F = Heat F
G = Heat G
H = 1 Row Coil
J = 2 Row Coil
K = Heat K
L = Heat L
M = Heat M
N = Heat N
P = Heat P
Model Option B: HEATING
0 = No Heating
B3: HEATING STAGING
1 = 1 Stage
2 = 2 Stage
3 = 3 Stage
4 = 4 Stage
5 = 5 Stage
6 = 6 Stage
7 = 7 Stage
8 = 8 Stage
9 = Modulating Gas/SCR Electric
A = Modulating/SCR Electric, 0-10V Control Signal
H = Single Serpentine 8 fpi
J = Half Serpentine 8 fpi
K = Single Serpentine 10 fpi
L = Half Serpentine 10 fpi
M = Single Serpentine 12 fpi
N = Half Serpentine 12 fpi
Feature 1: RETURN/OUTSIDE AIR
0 = Manually Adjustable OA Opening + RA Opening
1A: RETURN/OUTSIDE AIR SECTION
A = Economizer
B = Econ + Power Exhaust
C = Econ + Power Return
D = Econ + PE - Discharge Damper Volume Control
E = Econ + PE - Discharge Damper Volume Control
+ 0-10V External Control
F = Low cfm Total Energy Recovery Wheel
G = Low cfm Total ERW + Bypass
H = Low cfm Sensible ERW
J = Low cfm Sensible ERW + Bypass
K = 100% Outside Air - No Return Air
L = Motorized Outside Air Damper + RA Opening
M = Motorized Outside Air Damper - No Return Air
N = Empty ERW Option Box - No Power Exhaust
P = Empty ERW Option Box + Power Exhaust
Q = 1% Purge Low cfm Total ERW
R = 1% Purge Low cfm Total ERW + Bypass
S = 1% Purge Low cfm Sensible ERW
T = 1% Purge Low cfm Sensible ERW + Bypass
U = High cfm Total ERW
V = High cfm Total ERW + Bypass
W = High cfm Sensible ERW
Y = High cfm Sensible ERW + Bypass
Z = 1% Purge High cfm Total ERW
1 = 1% Purge High cfm Total ERW + Bypass
2 = 1% Purge High cfm Sensible ERW
3 = 1% Purge High cfm Sensible ERW + Bypass
4 = Single Total Energy Recovery Wheel + Bypass
5 = 100% Return Air

16
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–025–3–0–
B
B
0 2 –3 8 4 :
A
000–
D
0
B
–
D
E
H
–0
B
A
–0
D
0000
L
–0 0 –0 0
B
00000
B
GEN
Model Options
Unit Feature Options
Feature 1: RETURN/OUTSIDE AIR
0 = Standard – None
1B: RETURN/EXHAUST AIR BLOWER
CONFIGURATION
A = 1 Blower + Standard Eff. Motor
C = 1 Blower + Premium Eff. Motor
D = 2 Blowers + Premium Eff. Motors
E = 1 Blower + Premium Eff. + 1 VFD
F = 2 Blowers + Premium Eff. + 1 VFD
G = 2 Blowers + Premium Eff. + 2 VFDs
0 = Standard - None
1C: RETURN/EXHAUST AIR BLOWER
A = 12”x9” Forward Curved
B = 15” Backward Curved Plenum
C = 18.5” Backward Curved Plenum
D = 22” Backward Curved Plenum
F = 27” Backward Curved Plenum
G = 22” Direct Drive Axial Flow
H = 35.5” Direct Drive Axial Flow
J = 15” BC Plenum - 50% Width with Banding
K = 18.5” BC Plenum - 70% Width with Banding
L = 22” BC Plenum - 70% Width with Banding
M = 27” BC Plenum - 70% Width with Banding
N = 30” Backward Curved Plenum
P = 42” 9 Blade Direct Drive Axial Flow
Q = 42” 12 Blade Direct Drive Axial Flow
R = 24” Backward Curved Plenum
S = 33” Backward Curved Plenum
0 = Standard - None
1D: RETURN/EXHAUST AIR BLOWER
MOTOR
C = 1 hp - 1760 rpm
D = 2 hp - 1760 rpm
E = 3 hp - 1760 rpm
F = 5 hp - 1760 rpm
G = 7.5 hp - 1760 rpm
H = 10 hp - 1760 rpm
L = 15 hp - 1760 rpm
M = 20 hp - 1760 rpm
N = 1 hp - 1170 rpm
P = 2 hp - 1170 rpm
Q = 3 hp - 1170 rpm
R = 5 hp - 1170 rpm
S = 7.5 hp - 1170 rpm
T = 10 hp - 1170 rpm
U = 15 hp - 1170 rpm
V = 20 hp - 1170 rpm
W = 25 hp - 1170 rpm
Y = 30 hp - 1170 rpm
3 = 25 hp - 1760 rpm
4 = 30 hp - 1760 rpm
5 = 40 hp - 1760 rpm
6 = 50 hp - 1760 rpm

17
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
– 025 – 3 – 0 –
B
B
0 2
– 3 8 4 :
A
000
–
D
0
B
–
D
E
H
–
0
B
A
– 0
D
0000
L
– 0 0 – 0 0
B
00000
B
GEN
Model Options
Unit Feature Options
0 = Standard - None
Feature 2: OUTSIDE AIR CONTROL
A = 3 Position Actuator - Sensible Limit
B = 3 Position Actuator - Enthalpy Limit
C = Fully Modulating Actuator - Sensible Limit
D = Fully Modulating Actuator - Enthalpy Limit
E = DDC Actuator
F = Constant Volume Outside Air
G = Options A + F
H = Options B + F
J = Options C + F
K = Options D + F
L = Options E + F
M = 3 Pos. Act. - Sensible Limit + CO2Override
N = 3 Pos. Act. - Enthalpy Limit + CO2Override
P = Fully Mod. Act. - Sensible + CO2Override
Q = Fully Mod. Act. - Enthalpy + CO2Override
R = DDC Actuator + CO2Override
S = Dual Minimum Position Potentiometers + Fully
Mod. Act. - Sensible Limit
T = Dual Minimum Position Potentiometers + Fully
Mod. Act. - Enthalpy Limit
U = 2 Position Actuator
0 = Standard - None
Feature 3: HEAT OPTIONS
A = Regulator (2psi) with vent limiting device
B = Regulator (5psi) with vent limiting device
C = Regulator (2psi) vented
D = Regulator (5psi) vented
E = Discharge Air Override
F = Options A + E
G = Options B + E
H = Options C + E
J = Options D + E
K = Auxiliary Heat K
L = Auxiliary Heat L
M = Auxiliary Heat M
N = Auxiliary Heat N
P = Auxiliary Heat P
Q = Auxiliary Heat Q
R = Auxiliary Heat R
S = Auxiliary Heat S
T = Auxiliary Heat T
U = Auxiliary Heat U
V = Auxiliary Heat V
W = Auxiliary Heat W
0 = Standard - None
Feature 4: MAINTENANCE OPTIONS
A = Field Wired 115V Outlet
B = Factory Wired 115V Outlet
C = Blower Aux. Contact
D = Remote Start/Stop Terminals
E = Options A + C
F = Options A + D
G = Options B + C
H = Options B + D
J = Options A + C + D
K = Options B + C + D
L = Options C + D

18
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–025–3–0–
B
B
0 2 –3 8 4 :
A
000–
D
0
B
–
D
E
H
–0
B
A
–0
D
0000
L
–0 0 –0 0
B
00000
B
GEN
Model Options
Unit Feature Options
Feature 5: SUPPLY AIR OPTIONS
0 = 1 Blower + Standard Eff. Motor
5A: SUPPLY AIR BLOWER CONFIGURATION
A = 2 Blowers + Standard Eff. Motors
B = 1 Blower + Premium Eff. Motor
C = 2 Blowers + Premium Eff. Motors
D = 1 Blower + Premium Eff. + 1 VFD
F = 2 Blowers + Premium Eff. + 1 VFD
G = 2 Blowers + Premium Eff. + 2 VFDs
B = 15” Backward Curved Plenum
5B: SUPPLY AIR BLOWER
C = 18.5” Backward Curved Plenum
D = 24” Backward Curved Plenum
E = 27” Backward Curved Plenum
F = 30” BC Plenum - 90% Width + 1750 rpm Max -
Aluminum Wheel
G = 15” BC Plenum - 70% Width
H = 18.5” BC Plenum - 70% Width
J = 18.5” Backward Curved Plenum
K = 18.5” BC Plenum - 60% Width
L = 30” BC Plenum - 1600 rpm Max - Aluminum
Wheel
M = 13.5” Backward Curved Plenum
N = 13.5” BC Plenum - 70% Width
P = 24” BC Plenum - 60% Width
Q = 27” BC Plenum - 60% Width
R = 22” Backward Curved Plenum
S = 22” BC Plenum - 70% Width
T = 17” Backward Curved Plenum
U = 17” BC Plenum - 70% Width
V = 33” Backward Curved Plenum
W = 36.5” Backward Curved Plenum
Y = 42.5” Backward Curved Plenum
C = 1 hp - 1760 rpm
5C: SUPPLY AIR BLOWER MOTOR
D = 2 hp - 1760 rpm
E = 3 hp - 1760 rpm
F = 5 hp - 1760 rpm
G = 7.5 hp - 1760 rpm
H = 10 hp - 1760 rpm
L = 15 hp - 1760 rpm
M = 20 hp - 1760 rpm
N = 1 hp - 1170 rpm
P = 2 hp - 1170 rpm
Q = 3 hp - 1170 rpm
R = 5 hp - 1170 rpm
S = 7.5 hp - 1170 rpm
T = 10 hp - 1170 rpm
U = 15 hp - 1170 rpm
V = 20 hp - 1170 rpm
W = 25 hp - 1170 rpm
Y = 30 hp - 1170 rpm
3 = 25 hp - 1760 rpm
4 = 30 hp - 1760 rpm
5 = 40 hp - 1760 rpm
6 = 50 hp - 1760 rpm
Feature 6: FILTERS
0 = Standard - None
6A: PRE FILTER
A = 2” Pleated - 30% Eff. - MERV 8
B = Metal Mesh Outside Air Filter
C = Lint Screen Filter
D = Exhaust Air ERW Filter
F = Options A + D
G = Options B + D
H = Options A + B + D
0 = 2” Throwaway
6B: UNIT FILTER
or 2” Pleated - 30% Eff. - MERV 8
A = 2” Pleated - 30% Eff. - MERV 8
B = 4” Pleated - 30% Eff. - MERV 8
C = 2” Permanent Filter + Replaceable Media
F = 4” Pleated - 65% Eff. - MERV 11
G = 4” Pleated - 85% Eff. - MERV 13
H = 4” Pleated - 95% Eff. - MERV 14

19
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
– 025 – 3 – 0 –
B
B
0 2 –
3 8 4 :
A
000
–
D
0
B
–
D
E
H
–
0
B
A
–
0
D
000 0
L
– 0 0 – 0 0
B
00000
B
GEN
Model Options
Unit Feature Options
0 = Standard
6C: FILTER OPTIONS
A = Clogged Filter Switch
B = Magnehelic Gauge
C = Options A + B
0 = Standard
Feature 7: REFRIGERATION
CONTROL
A = 5 Min. Time Delay Relay - Comp. Off
B = 20 Sec. Time Delay Relay - Comp. Staging
C = Fan Cycling
D = Adjustable Lockouts - Each Circuit
E = Freeze Stats - Each Circuit
F = Options A + B
G = Options A + C
H = Options A + D
J = Options A + E
K = Options B + C
L = Options B + D
M = Options B + E
N = Options C + D
P = Options C + E
Q = Options D + E
R = Options A + B + C
S = Options A + B + D
T = Options A + B + E
U = Options A + C + D
V = Options A + C + E
W = Options A + D + E
Y = Options B + C + D
Z = Options B + C + E
1 = Options B + D + E
2 = Options C + D + E
3 = Options A + B + C + D
4 = Options A + B + C + E
5 = Options A + B + D + E
6 = Options A + C + D + E
7 = Options B + C + D + E
8 = Options A + B + C + D + E
0 = Standard
Feature 8: REFRIGERATION OPTIONS
A = Hot Gas Bypass Lead Stage
or Hot Gas Bypass Lag Stage with Lead Variable
Capacity Compressor
B = Hot Gas Bypass Lead and Lag Stages
C = Hot Gas Reheat
D = Modulating Hot Gas Reheat
E = 0°F Low Ambient Lead Stage
F = Options A + C
G = Options B + C
H = Options A + D
J = Options B + D
K = Options A + E
L = Options B + E
0 = Standard
Feature 9: REFRIGERATION
ACCESSORIES
A = Sight Glass
B = Compressor Isolation Valves
C = Options A + B
D = ECM Condenser Fan - Multiple Speed
E = ECM Condenser Fan - Head Pressure Control
F = VFD Controlled Condenser Fans - Variable
Speed
G = Options A + D
H = Options B + D
J = Options A + B + D
K = Options A + E
L = Options B + E
M = Options A + B + E
N = Options A + F
P = Options B + F
Q = Options C + F
0 = Standard Power Block
Feature 10: POWER OPTIONS
A = 100 Amp Power Switch
B = 150 Amp Power Switch
C = 225 Amp Power Switch
D = 400 Amp Power Switch
E = 600 Amp Power Switch
F = 60 Amp Power Switch
5 = 800 Amp Power Switch
6 = 1200 Amp Power Switch

20
RN Series Feature String Nomenclature
:
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1A
1B
1C
1D
2
3
4
5A
5B
5C
6A
6B
6C
7
8
9
10
11
12
13
14A
14B
15
16
17
18
19
20
21
22
23
R
N
–025–3–0–
B
B
0 2 –3 8 4 :
A
000–
D
0
B
–
D
E
H
–0
B
A
–0
D
000 0
L
–0 0 –0 0
B
00000
B
GEN
Model Options
Unit Feature Options
0 = Standard
Feature 11: SAFETY OPTIONS
A = Return and Supply Air Firestat
B = Return Air Smoke Detector
C = Supply Air Smoke Detector
D = Options B + C
E = Options A + B
F = Options A + C
G = Options A + B + C
H = Remote Smoke Detector Terminals
J = Options A + H
K = Options B + H
L = Options C + H
M = Options D + H
N = Options A + B + H
P = Options A + C + H
Q = Options A + B + C + H
0 = Standard
Feature 12: CONTROLS
A = Low Limit Controls
B = Phase and Brown Out Protection
C = Energy Recovery Wheel Defrost
D = Energy Recovery Wheel Rotation Detection
E = Compressor Power Factor Correction
F = Options A + B
G = Options A + C
H = Options A + D
J = Options A + E
K = Options B + C
L = Options B + D
M = Options B + E
N = Options C + D
P = Options C + E
Q = Options D + E
R = Options A + B + C
S = Options A + B + D
T = Options A + B + E
U = Options A + C + D
V = Options A + C + E
W = Options A + D + E
Y = Options B + C + D
Z = Options B + C + E
1 = Options B + D + E
2 = Options C + D + E
3 = Options A + B + C + D
4 = Options A + B + C + E
5 = Options A + B + D + E
6 = Options A + C + D + E
7 = Options B + C + D + E
8 = Options A + B + C + D + E