AAON CF Series Owner's manual

CF Series
Condenser and Condensing Units
Installation, Operation,
& Maintenance
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.
Keep a copy of this IOM with the
unit.
WARNING
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
UL-60335

2
Table of Contents
i
Index of Tables and Figures
Tables:
Table 1 - Clearances for Proper Operation ................................................................................... 18
Table 2 - Clearances for Coil Pull................................................................................................. 18
Table 3 - Acceptable Fin & Tube Refrigeration Circuit Values................................................... 23
Table 4 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values
(Metric) ......................................................................................................................................... 24
Table 5 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values
(Imperial) ...................................................................................................................................... 24
Table 6 - R-410A Refrigerant Temperature-Pressure Chart (Metric) .......................................... 26
Table 7 - R-410A Refrigerant Temperature-Pressure Chart (Imperial)........................................ 27
Table 8 - R-454B Refrigerant Temperature-Pressure Chart (Metric)........................................... 28
Table 9 - R-454B Refrigerant Temperature-Pressure Chart (Imperial)........................................ 29
Table 10 - Estimated R410A Refrigerant Charge per 5 ft at SCT = 115oF & Subcooling = 10oF,
SST = 45oF & Superheat=10oF..................................................................................................... 30
Table 11 - Charge to Flood Fin and Tube Condenser Coil for Ambient Above 21.3°C (70°F).. 31
Table 12 - Charge to Flood Microchannel Condenser Coil for Ambient Above 21.3°C (70°F) .. 31
Table 13 - % Charge to Flood Condenser Coil for Ambient Below 21.3°C (70°F) ..................... 31
Table 14 - Nameplate Voltage Markings & Tolerances ............................................................... 42
Table 15 – 35 KAIC Fuse Sizing.................................................................................................. 44
Table 16 – 65 KAIC Fuse Sizing.................................................................................................. 44
Table 17 - Demand Signal vs. Compressor Capacity Modulation................................................ 46
Table 18 - Thermistor Temperature vs. Resistance Values .......................................................... 47
Table 19 - Max Filter Drier Pressure Drops ................................................................................. 49
Figures:
Figure 1 - Forklifting a CF Series A Cabinet................................................................................ 17
Figure 2 - Forklifting a CF Series B and C Cabinet ..................................................................... 17
Figure 3 - Lifting Details and Orientation of a CF Series 9-70 ton Condensing Unit.................. 18
Figure 4 - Orientation of Series 2-7 ton Condensing Unit............................................................ 18
Figure 5 - CU evacuation connections.......................................................................................... 20
Figure 6 - CU evacuation connections.......................................................................................... 21
Figure 7 - Adjustable Fan Cycling Switch.................................................................................... 32
Figure 8 - LAC Piping Example ................................................................................................... 33
Figure 9 - Double Suction Riser Construction.............................................................................. 36
Figure 10 - Heat Pump Piping Schematic of Cooling Mode in Double Riser.............................. 39
Figure 11 - Heat Pump Piping Schematic of Heating Mode in Double Riser .............................. 39
Figure 12 - Oil Return Line .......................................................................................................... 41
Figure 13 - Variable Capacity Compressor Controller ................................................................. 45
Figure 14 - Compressor Controller Flash Code Details................................................................ 47
Figure 15 - Adjustable compressor lockout .................................................................................. 48

3
Figure 16 - Ambient sensor cover................................................................................................. 48
Figure 17 - A/C Split System Piping, Suction Down ................................................................... 57
Figure 18 - A/C Split System Piping, Suction Up ........................................................................ 58
Figure 19 - A/C with LAC Split System Piping, Suction Down .................................................. 59
Figure 20 - A/C with LAC Split System Piping, Suction Up ....................................................... 60
Figure 21 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Down ............. 61
Figure 22 - A/C with Modulating Hot Gas Reheat Split System Piping, Suction Up .................. 62
Figure 23 - A/C with Modulating Hot Gas Reheat Split + LAC System Piping, Suction Down. 63
Figure 24 - A/C with Modulating Hot Gas Reheat Split + LAC System Piping, Suction Up...... 64
Figure 25 - A/C with Hot Gas Bypass Split System Piping, Suction Down ................................ 65
Figure 26 - A/C with Hot Gas Bypass Split System Piping, Suction Up ..................................... 66
Figure 27 - A/C with Hot Gas Bypass + LAC Split System Piping, Suction Down .................... 67
Figure 28 - A/C with Hot Gas Bypass + LAC Split System Piping, Suction Up ......................... 68
Figure 29 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping,
Suction Down................................................................................................................................ 69
Figure 30 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass Split System Piping,
Suction Up .................................................................................................................................... 70
Figure 31 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass + LAC Split System
Piping, Suction Down ................................................................................................................... 71
Figure 32 - A/C with Modulating Hot Gas Reheat and Hot Gas Bypass + LAC Split System
Piping, Suction Up........................................................................................................................ 72
Figure 33 - Heat Pump Split System Piping, Suction Down ........................................................ 73
Figure 34 - Heat Pump Split System Piping, Suction Up............................................................. 74
Figure 35 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Down.. 75
Figure 36 - Heat Pump with Modulating Hot Gas Reheat Split System Piping, Suction Up....... 76
Figure 37 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Down ..................... 77
Figure 38 - Heat Pump with Hot Gas Bypass Split System Piping, Suction Up .......................... 78
Figure 39 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System
Piping, Suction Down ................................................................................................................... 79
Figure 40 - Heat Pump with Modulating Hot Gas Reheat and Hot Gas Bypass Split System
Piping, Suction Up........................................................................................................................ 80
V04410 · Rev. A · 230927
(ACP J000237 )

4
AAON CF Series Features and Options Introduction
Energy Efficiency
•Two-Stage, 10-100% Variable Capacity,
or Tandem R-410A Scroll Compressors
•Air-Source Heat Pump
•VFD Controlled and ECM Driven
Condenser Fans
Humidity Control
•Modulating Hot Gas Reheat
•Makeup Air Applications up to 100%
Outside Air
Safety
•Phase and Brownout Protection
•Single Point Non-Fused Disconnect
Power Switch
•Automatic Low Pressure and Manual
Reset High Pressure Safety Cut-outs
•Adjustable Compressor Lockout
Installation and Maintenance
•Isolated Controls and Compressor
Compartment
•Access Doors with Full Length Stainless
Steel Piano Hinges
•Molded Lockable Handles
•Color-Coded Wiring Diagrams
•Run Test Report and Installation Manual
Included in Controls Compartment
•Factory Installed Convenience Outlet
•Service Access Lights
•Remote Start/Stop Terminals
•Liquid Line Sight Glass
•Compressor Isolation Valves
System Integration
•Complete Split System with AAON DX
Air Handling Units
•Remote Air-Cooled Condenser Option
•Labeled Split System Piping Stub Outs
with Shut-Off Valves
•Flooded Condenser 0°F Low Ambient
Controls
•Terminal Block for Thermostat with
Isolation Relays
•Constant Air Volume (CAV), Makeup
Air (MUA), Variable Air Volume
(VAV), and Single Zone Variable Air
Volume (SZ VAV)
Environmentally Friendly
•R-410A Refrigerant
Extended Life
•Optional 5 Year Compressor Warranty
•G90 Galvanized Steel Construction
•2,500 Hour Salt Spray Tested Exterior
Corrosion Protection
•10,000 Hour Salt Spray Tested Polymer
E-Coated Condenser Coils
•Condenser Coil Guards
•Custom Color Paint Options

5
Safety
Attention must be paid to the following statements:
NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Caution statements are given to prevent actions that may result in equipment
damage, property damage, or personal injury.
WARNING - Warning statements are given to prevent actions that could result in
equipment damage, property damage, personal injury or death.
DANGER - Danger statements are given to prevent actions that will result in equipment
damage, property damage, severe personal injury or death.
QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life.
Startup and
service must be performed by a
Factory Trained Service Technician. A
copy of this IOM must be kept with the
unit.
WARNING
ELECTRIC SHOCK
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
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
e
lectrical 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

6
ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
remove grill containing fans until the
power to the unit has been
disconnected and fan has stopped
rotating.
WARNING
LIVE ELECTRICAL
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, must 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 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
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
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

7
LEAK TESTING
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
VARIABLE FREQUENCY DRIVES
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
motors FLA rating as shown on the
motor nameplate.
CAUTION
PVC PIPING
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used with R-
410A and other
refrigerants, even in trace amounts, in
a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
CAUTION
3-PHASE ROTATION
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 ro
tation must
be checked using suction and
discharge gauges. Fan motor rotation
must be checked for proper operation.
Alterations must only be made at the
unit power connection
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
DOOR LATCHES
Door compartments containing
hazardous voltage or rotating parts
are equipped with door latches that
allow locks. Door latches are shipped
with a nut and bolt requiring tooled
access. If the shipping hardware is not
replaced with a pad lock, always re-
install the nut and bolt after closing the
door to maintain tooled access.
CAUTION

8
ENCLOSED AREA
Do not work in an en
closed area
where refrigerant or nitrogen gases
may be leaking. A sufficient quantity of
vapors may be present and cause
injury or death.
WARNING
COMPRESSOR LUBRICANT
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
COIL CLEANERS
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
COIL CLEANERS
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
COIL CLEANING
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
CONVENIENCE OUTLETS
Factory installed convenience outlets
are not intended for use while the unit
is operating.
WARNING
Unit power supply wire must be only
copper or aluminum.
CAUTION
In order to avoid a hazard due to
inadvertent resetting of the THERMAL
CUT-OUT, this appliance must not be
supplied through an external switching
device, such as a timer, or connected to a
circuit that is regularly switched on and
off by the utility.
CAUTION

9
1. Startup and service must be performed by
a Factory Trained Service Technician.
2. The unit is for outdoor use only. See
General Information section for more
information.
3. 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
purchased.
4. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
5. Keep this manual and all literature
safeguarded near or on the unit.
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME
To prevent motor overheating
compressors must cycle off for a
minimum of 3 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 7
starts per hour.
WARNING
This appliance is not intended for use
by persons
with reduced physical,
sensory or mental capabilities, or lack
of experience and knowledge, unless
they have been given supervision or
instruction concerning use of the
appliance by a person responsible for
thei
r safety. Children must be
supervised to ensure they do not play
with this appliance.
WARNING
Units with VFD driven
motors/compressors have adjustable
overload settings. These are set by
the AAON factory for the protection of
these motors/compressors and must
not be adjusted over this factory
setpoint or bypassed.
WARNING

CF Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
MJREV
SIZE
SERIES
MNREV
VLT A1 A2 A3 A4 A5
1
2A
2B
3A
3B
4
5
6A
6B
6C
7
8A
8B
8C
8D
9
10
11
12
13
14
15
CF
A
-
015
-
A
-
0
-
3
-
D
A
0
0
K
:
0
-
A
0
-
E
0
-
C
0
-
A
J
0
-
D
-
B
A 0 0 - 0 0 A 0 E 0 0
0 0 0 0 0 D B
16
17
18
19
20
21
22
10
CFSeriesFeatureStringNomenclature
MODEL OPTIONS
Series and Generation
CF
Major Revision
A
Unit Size
002 = 2 ton Capacity
003 = 3 ton Capacity
004 = 4 ton Capacity
005 = 5 ton Capacity
006 = 6 ton Capacity (Obsolete)
007 = 7 ton Capacity
009 = 9 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
060 = 60 ton Capacity
070 = 70 ton Capacity
Series
A = 2-7 ton units
B = 9-15 ton units
C = 16-25 & 30 ton units
D = 26 & 31-70 ton units
Minor Revision
A
Voltage
1 = 230V/1Φ/60Hz
2 = 230V/3Φ/60Hz
3 = 460V/3Φ/60Hz
4 = 575V/3Φ/60Hz
8 = 208V/3Φ/60Hz
9 = 208V/1Φ/60Hz
A1: Compressor Style
0 = Air-Cooled Condenser - No Compressors
(1 Circuit)
A = R-410A Scroll Compressors
B = R-410A Two-Stage Capacity Scroll Compressors
D = R-410A Variable Capacity Scroll Compressors
E = R-410A Tandem Scroll Compressors
G = R-410A Tandem Variable Capacity Scroll
Compressors
P = Air-Cooled Condenser - No Compressors
(2 Circuits)
Q = Air-Cooled Condenser - No Compressors
(4 Circuits)
A2: Condenser Style
A = Air-Cooled Microchannel Condenser
C = Air-Cooled Condenser (Fin and Tube) (Obsolete)
J = Air-Source Heat Pump (Fin and Tube)
A3: Configuration
0 = Standard
A4: Coating
0 = Standard
E = Polymer E-Coated Condenser Coil
F = Stainless Steel Casing (Obsolete)
G = Copper Fin + Stainless Steel Casing (Obsolete)
H = Option E + F (Obsolete)
A5: Staging
0 = No Cooling
G = 1 On/Off Refrigeration System
H = 1 Variable Capacity Refrigeration System
J = 2 On/Off Refrigeration Systems
K = 1 Variable Capacity Refrigeration System + 1
On/Off Refrigeration System
L = 2 Variable Capacity Refrigeration System
M = 2 Two-Stage Refrigeration System
N = 1 Variable Capacity Refrigeration System + 1
Two-Stage Refrigeration System
R = 4 On/Off Refrigeration Systems
T = 2 Variable Capacity Refrigeration Systems + 2
On/Off Refrigeration Systems
U = 4 Variable Capacity Refrigeration Systems

CF Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
MJREV
SIZE
SERIES
MNREV
VLT A1 A2 A3 A4 A5
1
2A
2B
3A
3B
4
5
6A 6B
6C
7
8A
8B
8C
8D
9
10
11
12
13
14
15
CF
A
-
015
-
B
-
0
-
3
-
D
A
0
0
K
:
0
-
A
0
-
E
0
-
C
0
-
A
N
0
-
B
-
D
E
0
0
-
0
0
A
0
E
0
0
0
0
0
0
0
D
B
16
17
18
19
20
21
22
11
UNIT FEATURE OPTIONS
1: Unit Orientation
0 = Vertical Condenser Discharge - Standard Access
A = Horizontal Condenser Discharge - Standard
Access
2A: Refrigeration Control
0 = Standard
A = 5 Minute Compressor Off Timer + 20 Second
Compressor Stage Delay
B = Fan Cycling (Obsolete)
C = Adjustable Fan Cycling
D = Adjustable Compressor Lockout
E = Freeze Stats (each circuit) (Obsolete)
F = Option A + B (Obsolete)
G = Option A + C
H = Option A + D
J = Option A + E (Obsolete)
K = Option B + D (Obsolete)
L = Option B + E (Obsolete)
M = Option C + D
N = Option C + E (Obsolete)
P = Option D + E (Obsolete)
Q = Option A + B + D (Obsolete)
R = Option A + B + E (Obsolete)
S = Option B + D + E (Obsolete)
T = Option C + D + E (Obsolete)
U = Option A + B + D + E (Obsolete)
V = Option A + C + D + E (Obsolete)
W = Option A + C + D
2B: Blank
0 = Standard
3A: Refrigeration Options
0 = Standard
A = Hot Gas Bypass Lead Stage [HGB]
B = HGB Lead + HGB Lag
C = On/Off Hot Gas Reheat [HGR] (Obsolete)
D = Hot Gas Bypass Non-Variable Capacity
Refrigeration Systems [HGBNV]
E = Modulating Hot Gas Reheat [MHGR]
F = HGB Lead + HGR (Obsolete)
G = HGB Lead + HGB Lag + HGR (Obsolete)
H = HGB + MHGR
J = HGB Lead + HGB Lag + MHGR
3A: Refrigeration Options Continued
K = HGBNV + HGR (Obsolete)
L = HGBNV + MHGR
M = HGB Lag (Obsolete)
N = HGB Lag + MHGR (Obsolete)
3B: Blank
0 = Standard
4: Refrigeration Accessories
0 = Standard
A = Sight Glass
B = Compressor Isolation Valves
C = Options A + B
D = Flooded Condenser 0°F Low Ambient Controls –
One Circuit
E = Options A + D
F = Options B + D
G = Options A + B + D
H = Flooded Condenser 0°F Low Ambient Controls-
Two Circuits
J = Options A + H
K = Options B + H
L = Options A + B + H
R = Flooded Condenser 0°F Low Ambient Controls –
Four Circuits
S = Options A + R
T = Options B + R
U = Options A + B + R
5: Blank
0 = Standard
6A: Unit Disconnect Type
0 = Single Point Power Block
A = Single Point Power Non-Fused Disconnect
6B: Disconnect 1 Size
0 = Standard
N = 100 amps
R = 150 amps
V = 250 amps
Z = 400 amps
6C: Blank
0 = Standard

CF Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
MJREV
SIZE
SERIES
MNREV
VLT A1 A2 A3 A4 A5
1
2A
2B
3A
3B
4
5
6A
6B
6C
7
8A
8B
8C
8D
9
10
11
12
13
14
15
CF
A
-
015
-
B
-
A
-
3
-
D
A
0
0
K
:
0
-
A
0
-
E
0
-
C
0
-
A
N
0
-
B
-
D
E
0
0
-
0
0
A
0
E
0
0
0
0
0
0
0
D
B
16
17
18
19
20
21
22
12
7: Accessories
0 = Standard
A = Suction Pressure Transducer on Lead
Refrigeration Circuit (Obsolete)
B = Phase & Brown Out Protection
D = Suction Pressure Transducer on Each
Refrigeration Circuit
E = Compressor Sound Blanket
F = Options A + B (Obsolete)
J = Options A + E (Obsolete)
L = Options B + D
M = Options B + E
Q = Options D + E
T = Options A + B + E (Obsolete)
1 = Options B + D + E
8A: Control Sequence
A = Terminal Block for Thermostat w/ Isolation
Relays
D = VAV Unit Controller - VAV Cool + CAV Heat
E = CAV Unit Controller
F = Makeup Air Unit Controller - CAV Cool + CAV
Heat
H = Constant Volume HP Unit Controller - CAV
Cool + CAV Heat
J = Makeup Air HP Unit Controller - CAV Cool +
CAV Heat
N = Field Installed DDC Controls by Others with
Isolation Relays
8B: Control Suppliers
0 = Standard Terminal Block
C = Orion VCM-X (Main Controller in Air Handling
Unit) (Obsolete)
E = Orion VCC-X (Main Controller in Air Handling
Unit)
H = AAON Touchscreen Controller (Main Controller
in Air Handling Unit) (Obsolete)
J = AAON Refrigeration System Supervisory
Controls
8C: Control Supplier Options
0 = Standard
8D: BMS Connection & Diagnostics
0 = Standard
9: Blank
0 = Standard
10: Blank
0 = Standard
11: Maintenance Accessories
0 = Standard
A = Factory Wired 115VAC Convenience Outlet
B = Field Wired 115VAC Convenience Outlet
C = Service Lights
E = Remote Unit Start/Stop Terminals
F = Options A + C
H = Options A + E
J = Options B + C
L = Options B + E
N = Options C + E
R = Options A + C + E
U = Options B + C + E
12: Code Options
0 = Standard ETL USA Listing
B = ETL USA + Canada Listing
13: Air-Cooled Condenser Accessories
0 = Standard
A = Condenser Coil Guard
C = ECM Condenser Fan Head Pressure Control
E = VFD Condenser Fan Head Pressure Control
G = Options A + C
J = Options A + E
K = Low Sound Condenser Fan (Obsolete)
L = Options A + K (Obsolete)
N = Options C + K (Obsolete)
S = Options A + C + K (Obsolete)
14: Blank
0 = Standard
15: Blank
0 = Standard
16: Electrical Options
0 = Standard 5 kAIC
C = 10 kAIC

CF Series Feature String Nomenclature
Model Options
:
Unit Feature Options
GEN
MJREV
SIZE
SERIES
MNREV
VLT A1 A2 A3 A4 A5
1
2A
2B
3A
3B
4
5
6A 6B
6C
7
8A
8B
8C
8D
9
10
11
12
13
14
15
CF
A
-
015
-
B
-
A
-
3
-
D
C
0
0
K
:
0
-
A
0
-
E
0
-
C
0
-
A
N
0
-
B
-
D
E
0
0
-
0
0
A
0
E
0
0
0
0
0
0
0
D
B
16
17
18
19
20
21
22
13
17: Shipping Options
0 = Standard
A = Crating
B = Export Crating
18: Blank
0 = Standard
19: Blank
0 = Standard
20: Cabinet Material
0 = Galvanized Steel Cabinet
21: Warranty
0 = Standard
D = Compressor Warranty - Years 2-5
22: Type
B = Premium AAON Gray Paint Exterior
E = Premium AAON Gray Paint Ext + Shrink Wrap
X = SPA + Premium AAON Gray Paint Exterior
1 = SPA + Premium AAON Gray Paint Exterior +
Shrink Wrap

14
General Information
AAON CF Series air-cooled condensers and
condensing units have been designed for
outdoor use only. They are factory
assembled, wired, charged, and run-tested.
Codes and Ordinances
CF Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 60335-2-40 4th Edition,
ANSI Safety Standard Z21.47-2016.
System must be sized in accordance with the
American Society of Heating, Refrigeration
and Air Conditioning Engineers Handbook.
Installation of CF Series units must conform
to the ICC standards of the International
Mechanical Code, the International Building
Code, and local building, plumbing and
electrical codes. All appliances must be
electrically grounded in accordance with
local codes, or in the absence of local codes,
the current National Electric Code,
ANSI/NFPA 70 or the current Canadian
Electrical Code CSA C22.1.
Receiving Unit
When received, check the unit for damage
that might have occurred in transit. If damage
is found it must be noted on the carrier’s
freight bill. A request for inspection by
carrier’s agent must be made in writing at
once. Check the nameplate to ensure the
correct model sizes and voltages have been
received to match the job requirements.
If repairs must be made to damaged goods,
then the factory must be notified before any
repair action is taken in order to protect the
warranty. Certain equipment alteration,
repair, and manipulation of equipment
without the manufacturer’s consent may void
the product warranty. Contact AAON
Technical Support for assistance with
handling damaged goods, repairs, and freight
claims: [phone].
SHARP EDGES
Coils and sheet metal surfaces
present sharp edges and care must
be taken when working with
equipment.
WARNING
QUALIFIED INSTALLER
Improper installation, adjustment,
alteration, service or maintenance can
cause property damage, personal
injury or loss of life. Installation and
service must be performed by a
Factory Trained Service Technician.
WARNING
Failure to observe the following
instructions will result in premature
failure of your system and possible
voiding of the warranty.
WARNING

15
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.
Failure to observe the following instructions
will result in premature failure of your
system, and possible voiding of the warranty.
Never turn off the main power supply to the
unit, except for complete shutdown. When
power is cut off from the unit, any
compressors using crankcase heaters cannot
prevent refrigerant migration. This means the
compressor will cool down, and liquid
refrigerant may accumulate in the
compressor. The compressor is designed to
pump refrigerant gas and damage may occur
if liquid enters the compressor when power is
restored.
Before unit operation, the main power switch
must be turned on for at least twenty-four
hours for units with compressor crankcase
heaters. This will give the crankcase heater
time to clear any liquid accumulation out of
the compressor before it is required to run.
Always control the system from the control
panel, never at the main power supply (except
for emergency or for complete shutdown of
the system).
CLEAN AIR ACT
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
CRANKCASE HEATER
OPERATION
Units are equipped with compressor
crankcase heaters, which must be
energized at least 24 hours prior to
cooling operation, to clear any liquid
refrigerant from the compressors.
CAUTION
3-PHASE ROTATION
Rotation must be checked on all
MOTORS AND COMPRESSORS of
three phase uni
ts. All motors, to
include and not be limited to pump
motors and condenser fan motors,
must all be checked by a qualified
service technician at startup and any
wiring alteration must only be made at
the unit power connection.
CAUTION

16
The standard compressors must be on a
minimum of 5 minutes and off for a minimum
of 3 minutes. The cycle rate must be no more
than 7 starts per hour.
The compressor life will be seriously
shortened by reduced lubrication, and the
pumping of excessive amounts of liquid oil
and liquid refrigerant.
Wiring Diagrams
Unit specific wiring diagrams are laminated
and affixed inside the controls compartment
door.
General Maintenance
When the initial startup is made, and on a
periodic schedule during operation, it is
necessary to perform routine service checks
on the performance of the condensing unit.
This includes reading and recording suction
pressures and checking for normal sub-
cooling and superheat.
COMPRESSOR ROTATION
Scroll compressors are directional
and will be damaged by operation in
the wrong direction. Low pressure
switches on compressors have been
disconnected after factory testing.
Rotation must be checked by a
qualified service technician at startup
using suction and discharge pressure
gauges and any wiring alteration must
only
be made at the unit power
connection.
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME
To
prevent motor overheating
compressors must cycle off for a
minimum of 3 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 7
starts per hour.
WARNING
CAUTION

17
Installation
Forklifting the Unit
CF Series condensing unit sizes 2-25 & 30
tons can be lifted using a forklift. 2-7 ton
units must have forks at least 1.2 m (48”) in
length. 9-25 & 30 ton units must have forks
1.8 m (72”) in length, or the forks must have
1.8 m (72”) fork extensions. Standard units
can be lifted from all sides except the
condenser coil side. CF Series condensing
unit sizes 26 & 31-70 tons cannot be lifted
using a forklift. They can be lifted as shown
in Figure 3.
Forks must be perpendicular to the unit and
they must be in far enough that the back of
the forks are no more than 15.25 cm (6”)
away from the edge of the unit.
Figure 1 - Forklifting a CF Series A Cabinet
Figure 2 - Forklifting a CF Series B and C
Cabinet
FORKLIFTING
2-7 TON UNITS
Forks or Fork Extensions must be at
least 1.2 m (48”) in length.
CAUTION
FORKLIFTING
9-25 & 30 TON UNITS
Forks or Fork Extensions must be at
least 1.8 m (72”) in length.
CAUTION

18
Lifting the Unit
If cables or chains are used to hoist the unit
they must be the same length. Minimum
cable length is 251.5 cm (99”) for CF Series
9-70 ton units. CF Series 2-7 ton units do not
include factory installed lifting lugs and must
be lifted by forklift only. Care must be taken
to prevent damage to the cabinet, coils, and
condenser fans.
Before lifting unit, be sure that all shipping
material has been removed from unit. Secure
hooks and cables at all lifting points / lugs
provided on the unit.
Figure 3 - Lifting Details and Orientation of
a CF Series 9-70 ton Condensing Unit
Locating the Unit
The CF Series condenser and condensing unit
is designed for outdoor applications and
mounting at ground level or on a rooftop. It
must be placed on a level and solid
foundation that has been prepared to support
its weight. When installed at ground level, a
one-piece concrete slab must be used with
footings that extend below the frost line. Also
with ground level installation, care must be
taken to protect the coil fins from damage due
to vandalism or other causes.
The first clearance table below gives the
clearance values for proper unit operation.
The second clearance table gives the
clearance necessary for removing the coil
without disassembling a large part of the
condensing unit. For ease of removing the
condenser coil, use the second table
clearances for the right hand side of the unit.
Table 1 - Clearances for Proper Operation
Location
Unit Size
2-7 tons
cm (in.)
9-70 tons
cm (in.)
Front -
(Controls
Side)
Unobstructed 91.4 (36)
Left Side
15.25 (6)
76.2 (30)
Right Side
15.25 (6)
91.4 (36)
Top
7.6 (3)
Unobstructed
Back
45.7 (18)
15.25 (6)
Table 2 - Clearances for Coil Pull
Unit Size
Right Hand Side
cm (in.)
2-7 tons
106.7 (42)
9-15 tons
106.7 (42)
16-25 & 30 tons
137.2 (54)
26 & 31-70 tons
167.6 (66)
Figure 4 - Orientation of Series 2-7 ton
Condensing Unit

19
The placement relative to the building air
intakes and other structures must be carefully
selected. Airflow to and from the condenser
or condensing unit must not be restricted to
prevent a decrease in performance and
efficiency.
The installation position for 9-70 ton units
must provide at least 76.2 cm (30”) of left and
right side clearance for proper airflow to the
condenser coils. When units are mounted
adjacent to each other, the minimum right
and left side clearance required between the
units is 152.4 cm (60”) or 1.5 meters (5 feet).
Similarly, when 2-7 ton units are mounted
adjacent to each other, the minimum
clearance required between the back side of
the units is 91.4 cm (36”) or 0.9 meters (3
feet).
Units must not be installed in an enclosure or
pit that is deeper than the height of the unit.
When recessed installation is necessary, the
clearance to maintain proper airflow is at
least 1.5 meters (5 feet) (0.9 meters [3 feet]
for 2-7tons).
CF Series condensers and condensing units
that have a vertical air discharge must have
no obstruction above the equipment. Do not
place the unit under an overhang. CF Series
condensers and condensing units that have a
horizontal discharge must have no
obstruction in front of the unit.
For proper unit operation, the immediate area
around 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.
Mounting Isolation
For roof mounted applications or anytime
vibration transmission is a factor,
vibration isolators may be used. When
vibration isolators are used, the CF Series
unit must be directly mounted either on a
flat platform or on support rails running
front to back and at least 2.5 cm (1”) wider
than the unit base rail. If the CF is mounted
on the support rails, the additional width
of the support rail must be on the inside of
the unit such that the support rail fully
covers the corner connections of the unit
base rail. Any isolation must be applied to
the platform or support rails. DO NOT put
spring isolation on the base of the CF
Series Condensing Unit.
Access Doors
Access doors are provided to the compressor
and electrical compartment.
Standard Evacuation Instructions:
Proper system evacuation is critical to
remove moisture and non-condensables from
the system before charging the system with
refrigerant. A newly installed AAON
condensing unit has already been evacuated
and charged with some refrigerant at the
factory. When evacuating a new system,
PVC PIPING
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used with R-
410A and other
refrigerants, even in trace amounts, in
a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
CAUTION

20
keep the condensing unit service valves
closed and evacuate the suction and liquid
lines and the air handling unit. If the entire
system must be evacuated, use the following
procedure to ensure the entire system is
pulled into a good vacuum.
1. System evacuation must be
performed anytime a system is open to
atmospheric pressure. The POE oils
used with R-410A are extremely
hydroscopic in nature and immediately
begin pulling in moisture once the
system is opened to the atmosphere.
2. Before starting to evacuate the
system, you MUST ensure that there are
no leaks by pressurizing the system with
2758 kpa (400 psig) of dry nitrogen and
verifying no pressure loss after one hour.
3. Four valve manifold gauge sets are
more effective than standard manifold
gauge sets due to the extra hose port in
combination with a 9.5 mm (3/8’’)
evacuation port. The larger diameter
evacuation port will expedite system
evacuation.
4. Connect the manifold set to the
condensing unit with one hose on the
suction line service valve, one hose on
the liquid line service valve and if an
extra Schrader valve is field installed on
the suction line, connect a third hose (not
shown). The vacuum pump must be
connected to the manifold set using a
9.5 mm (3/8”) vacuum rated hose.
Figure 5 shows two circuits. Both
circuits must be evacuated separately.
Figure 5 - CU evacuation connections
5. An accurate micron gauge must be
used and checked by pulling a vacuum
on the gauge by itself and verify a rapid
drop to less than 100 microns within a
few minutes.
6. Do not attach the micron gauge to the
system until the gauge manifold is
reading 71 cm (28”) of vacuum to ensure
the micron gauge does not see pressure
and is thus damaged. MICRON
GAUGES WILL BE DAMAGED BY
PRESSURE!!!
7. It is a good practice to replace the
vacuum pump oil after one hour of the
evacuation process. The oil can be
broken down in the pump in the initial
first hour causing system evacuation to
take longer than it should.
8. The minimum micron level required
by AAON is 350 microns for systems
using POE oils.
9. The system must then be isolated and
the pump turned off to check for vacuum
rise due to leaks or moisture in the
system. The micron gauge must not rise
above 500 microns after 30 minutes of
wait time.