Aaon SB-003 Installation Manual
vicinity of this or any other appliance.
WARNING
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
WARNING
SB Series
Vertical Self Contained Units
Installation, Operation
& Maintenance
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
QUALIFIED INSTALLER
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and liquids in the
Table of Contents
Safety .............................................................................................................................................. 5
SB Series Feature String Nomenclature ....................................................................................... 11
General Information ...................................................................................................................... 15
Codes and Ordinances .............................................................................................................. 15
Receiving Unit .......................................................................................................................... 16
Storage ...................................................................................................................................... 16
Direct Expansion (DX) Systems ............................................................................................... 16
Wiring Diagrams ....................................................................................................................... 17
Condensate Drain Pans ............................................................................................................. 17
Installation..................................................................................................................................... 18
Locating the Unit ...................................................................................................................... 18
Lifting and Handling the Unit ................................................................................................... 19
Refrigerant-to-Water Heat Exchanger Water Piping ................................................................ 19
Electrical ................................................................................................................................... 23
Duct Connection ....................................................................................................................... 26
Condensate Drain Piping .......................................................................................................... 26
Waterside Economizer .............................................................................................................. 27
Heating Coils ............................................................................................................................ 28
Electric Preheat ......................................................................................................................... 28
Startup ........................................................................................................................................... 29
Supply Fans ............................................................................................................................... 29
Filters ........................................................................................................................................ 32
Adjusting Refrigerant Charge ................................................................................................... 32
Operation....................................................................................................................................... 35
Packaged DX Cooling Operation and Control ......................................................................... 35
Electric Heating Operation ....................................................................................................... 35
Steam or Hot Water Preheating Operation ............................................................................... 35
Modulating Electric Preheat ..................................................................................................... 35
Maintenance .................................................................................................................................. 35
DX Cooling ............................................................................................................................... 35
Condensate Drain Pans ............................................................................................................. 36
E-Coated Coil Cleaning ............................................................................................................ 36
Supply Fans ............................................................................................................................... 37
Filter Replacement .................................................................................................................... 38
Replacement Parts ..................................................................................................................... 38
AAON Longview Product Support ........................................................................................... 38
Filter Information .......................................................................................................................... 39
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 42
3
Index of Tables and Figures
Tables:
Table 1 - SB Series Clearances ..................................................................................................... 18
Table 2 - Glycol Freezing Points .................................................................................................. 21
Table 3 - Condenser Water Connections ...................................................................................... 22
Table 4 - Control Wiring ............................................................................................................... 25
Table 5 - Drain Trap Dimensions ................................................................................................. 27
Table 6 - Acceptable Water-Cooled Refrigeration Circuit Values ............................................... 33
Table 7 - R-410A Refrigerant Temperature-Pressure Chart ......................................................... 34
Table 8 - 3-5 ton (B Cabinet) Pre and Unit Filters ....................................................................... 39
Table 9 - 6-10 ton (C Cabinet) Pre and Unit Filters ..................................................................... 39
Table 10 - 14-18 ton (D Cabinet) Pre and Unit Filters ................................................................. 39
Table 11- 3-5 ton (B Cabinet) Mixing Box Filters ....................................................................... 40
Table 12 - 6-10 ton (C Cabinet) Mixing Box Filters .................................................................... 40
Table 13 - 14-18 ton (D Cabinet) Mixing Box Filters .................................................................. 41
Figures:
Figure 1 - Lockable Handle .......................................................................................................... 16
Figure 2 - SB Series ...................................................................................................................... 18
Figure 3 - SB Series Unit Orientation ........................................................................................... 19
Figure 4 - Drain Trap .................................................................................................................... 26
Figure 5 - SB Series Supply Fan ................................................................................................... 29
Figure 6 - ECM with Factory Provided Controls.......................................................................... 30
Figure 7 - ECM with Potentiometer Control ................................................................................ 30
Figure 8 - ECM with Field Installed Controls .............................................................................. 31
V14190 · Rev. B · 150727
(ACP 31227)
4
AAON SB Series Features and Options Introduction
Energy Efficiency
• Direct Drive Backward Curved Plenum
Supply Fans
• 10-100% Variable Capacity Scroll
Compressors
• Double Wall Rigid Polyurethane Foam
Injected Panel Construction
• Airside and Waterside Economizers
• Modulating SCR Electric Heat
• Modulating Head Pressure Control
• High Efficiency Electronically
Commutated Motors
• Coaxial Refrigerant-to-Water Heat
Exchanger
• Water-Source and Geothermal Heat
Pumps
• Single Zone Variable Air Volume
Indoor Air Quality
• Up to 100% Outside Air with Optional
Electric Pre-Heat
• Multiple High Efficiency Unit and
Mixing Box Filters
• Double Wall Construction with No
Exposed Insulation
Humidity Control
• 10-100% Variable Capacity Scroll
Compressors
• Modulating Hot Gas Reheat
Safety
• Freeze Stats
• Phase and Brown Out Protection
Installation and Maintenance
• Direct Drive Backward Curved Plenum
Supply Fans
• Clogged Filter Switch and Magnehelic
Gauge
• Color Coded Wiring Diagram
• Isolated Compressor and Controls
Compartment
• Compressor Isolation Valves
• Hinged Access Doors with Lockable
Handles
• Liquid Line Sight Glass
System Integration
• Customer Provided Controls
• Electric, Steam, or Hot Water Heating
• Refrigerant-to-Water Heat Exchangers
• Condensing Unit Only Options
• Split System Configurations
Environmentally Friendly
• R-410A Refrigerant
• Geothermal Heat Pump Configurations
Extended Life
• Standard 5 Year Compressor Warranty
• Double Wall Rigid Polyurethane Foam
Injected Cabinet Construction
• 2,500 Hour Salt Spray Tested Interior
and Exterior Corrosion Protection
• Polymer E-Coated Coils
• Stainless Steel Drain Pans
• Custom Color Paint Options
5
FIRE, EXPLOSION OR CARBON
Failure to replace proper controls
could result in fire, explosion or
to follow safety warnings exactly
and liquids in the vicinity of this
WARNING
Electric shock hazard. Before
servicing, disconnect all electrical
ELECTRIC SHOCK, FIRE OR
Failure to follow safety warnings
n dangerous
operation, serious injury, death or
Improper servicing could result in
Before servicing, disconnect all
may be
wires prior to disconnecting.
Verify proper operation after
Attention should be paid to the following statements:
Safety
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.
EXPLOSION HAZARD
exactly could result i
property damage.
dangerous operation, serious injury,
death or property damage.
electrical power to the unit. More
than one disconnect
provided.
When servicing controls, label all
Reconnect wires correctly.
servicing. Secure all doors with
key-lock or nut and bolt.
6
power to the unit, including remote
disconnects, to avoid shock hazard
or injury from rotating parts. Follow
proper Lockout-Tagout procedures.
MONOXIDE POISONING HAZARD
carbon monoxide poisoning. Failure
could result in serious injury, death or
property damage. Do not store or use
gasoline or other flammable vapors
appliance.
power to the unit has been
disconnected and fan wheel has
To prevent injury or death lifting
WARNING
All field installed wiring must be
completed by qualified personnel.
Field installed wiring must comply
to follow code requirements could
result in serious injury or death.
Provide proper unit ground in
accordance with these code
electrical components. Only a
qualified licensed electrician or
live electrical components shall
70E, an OSHA
regulation requiring an Arc Flash
marked for identification of where
appropriate Personal Protective
WARNING
During installation, testing, servicing
and troubleshooting of the equipment
it may be necessary to work with live
individual properly trained in handling
perform these tasks.
Standard NFPABoundary to be field established and
Equipment (PPE) be worn, should be
followed.
GROUNDING REQUIRED
UNIT HANDLING
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.
ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
open door containing fans until the
stopped rotating.
with NEC/CEC, local and state
electrical code requirements. Failure
requirements.
Failure to properly drain and vent
coils when not in use during freezing
temperature may result in coil and
equipment damage.
7
not use alkaline chemical coil
CAUTION
CAUTION
A sufficient quantity of
WARNING
Always use a pressure regulator,
ges to control
WARNING
in place of refrigerant and dry
WARNING
Prior to connection of condensing
or death due to instantaneous
on all
should be checked for proper
CAUTION
Rotation must be checked
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
operation. Alterations should only be
made at the unit power connection
WATER PRESSURE
water supply, verify water pressure is
less than maximum pressure shown
on unit nameplate. To prevent injury
release of high pressure water, relief
valves should be field supplied on
system water piping.
Do not use oxygen, acetylene or air
valves and gau
incoming pressures when pressure
testing a system. Excessive pressure
may cause line ruptures, equipment
damage or an explosion which may
result in injury or death.
Do not work in a closed area where
refrigerant or nitrogen gases may be
leaking.
vapors may be present and cause
injury or death.
Do not clean DX refrigerant coils with
hot water or steam. The use of hot
water or steam on refrigerant coils
will cause high pressure inside the
coil tubing and damage to the coil.
To prevent damage to the unit, do not
use acidic chemical coil cleaners. Do
nitrogen for leak testing. A violent
explosion may result causing injury or
death.
8
cleaners with a pH value greater than
8.5, after mixing, without first using
an aluminum corrosion inhibitor in the
cleaning solution.
by certain
chemicals. Polyolester (POE) oils
410A and other
and fittings and complete piping
CAUTION
Failure of the condenser due to
refrigerant circuit and will cause
verage under AAON
manufacturer warranties.
of chemical corrosion is excluded
from coverage under AAON Inc.
WARNING
Cleaning the cooling tower or the
condenser water loop with harsh
(muriatic acid) or chlorine, can
Care should be taken to avoid
allowing chemicals to enter the
cooled condenser. See
Heat Exchanger
Corrosion Resistance for more
CAUTION
Door compartments containing
CAUTION
Some chemical coil cleaning
Failure to follow
compounds are caustic or toxic. Use
these substances only in accordance
with the manufacturer’s usage
instructions.
instructions may result in equipment
damage, injury or death.
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.
chemicals, such as hydrochloric acid
damage the water-cooled condenser.
OPEN LOOP APPLICATIONS
Failure of the condenser as a result
warranties and the heat exchanger
manufacturer’s warranties.
WATER FREEZING
freezing will allow water to enter the
extensive damage to the refrigerant
circuit components. Any damage to
the equipment as a result of water
freezing in the condenser is excluded
from co
warranties and the heat exchanger
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack
waterAppendix A -
information.
used with Rrefrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
system failure.
9
To prevent motor overheating
compressors must cycle off for a
To maintain the proper oil level
compressors must cycle on for a
starts per hour.
WARNING
COMPRESSOR CYCLING
5 MINUTE MINIMUM OFF TIME
minimum of 5 minutes.
5 MINUTE MINIMUM ON TIME
minimum of 5 minutes.
The cycle rate must not exceed 6
1. Startup and service must be performed
by a Factory Trained Service
Technician.
2. The unit is for indoor use only. See
General Information section for more
unit information.
3. 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.
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.
10
SB Series Feature String Nomenclature
:
SB - 007
- 3 - 0 - E 7 0 9 - 0 0 0
:
Model Options
GEN
SIZE
SB Series Feature String Nomenclature
MODEL OPTIONS
Series and Generation
SB
Unit Size
003 = 3 ton Capacity
004 = 4 ton Capacity
005 = 5 ton Capacity
006 = 6 ton Capacity
007 = 7 ton Capacity
009 = 9 ton Capacity
010 =10 ton Capacity
014 =14 ton Capacity
016 = 16 ton Capacity
018 = 18 ton Capacity
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
Configuration
0 = Right Hand Unit + Top Vertical Discharge
A = Left Hand Unit + Top Vertical Discharge
A1: Refrigerant Style
E = R-410A Variable Capacity Scroll Compressor
A2: Unit Configuration
0 = Water-Cooled Condenser - Condensing Unit
Only
7 = Water-Source/Geothermal Heat Pump + Std
Evap. Coil - Coaxial Heat Exchanger
8 = Water-Source/Geothermal Heat Pump + 6 Row
Evap. Coil - Coaxial Heat Exchanger
9 = Water-Source/Geothermal Heat Pump Condensing Unit Only
A3: Coil Coating
0 = Standard
1 = Polymer E-Coated Cooling Coil
VLT
CONFIG
A1
A2
A3
A4
B1
B2
Unit Feature Options
B3
1A
1B
1C
1D 2 3 4 5A
5B
5C 6A
6B
6C 7 8 9
10
11
0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0 0 0 0 Y - E 0
0 0 0 0 0 0 0 A B
15
16
17
18
A4: Cooling / Heat Pump Staging
9 = Modulating - Variable Capacity Compressor
B1: Heating Type
0 = No Heating
3 = Electric Heat
C = Steam Distributing Standard Coil
D = Steam Distributing Polymer E-Coated Coil
E = Hot Water Standard Coil
F = Hot Water Polymer E-Coated Coil
B2: Heating Designation
0 = No Heating
1 = 1 Row Coil
2 = 2 Row Coil
A = 7 kW (5.3 kW @ 208V)
B = 14 kW (10.5 kW @ 208V)
C = 21 kW (15.8 kW @ 208V)
D = 28 kW (21.0 kW @ 208V)
E = 35 kW (26.3 kW @ 208V)
F = 42 kW (31.5 kW @ 208V)
G = 49 kW (37.0 kW @ 208V)
H = 56 kW (42.0 kW @ 208V)
J = 63 kW (47.3 kW @ 208V)
K = 70 kW (52.5 kW @ 208V)
B3: Heating Staging
0 = No Heating
1 = 1 Stage
2 = 2 Stage
3 = 3 Stage
4 = 4 Stage
9 = Modulating/SCR Electric - Potentiometer Control
A = Modulating/SCR Electric - 0-10VDC 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
12
19
13 14A
20
21
14B
22
23
11
SB Series Feature String Nomenclature
:
1A
1C
1D 2
3 4
5A
5C
6B
6C 7 8 9
: 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0
Model Options
GEN
SIZE
VLT
CONFIG
A1
A2
A3
A4
B1
B2
B3
1B
Unit Feature Options
5B
6A
10
11
12
13 14A
14B
SB - 007 - 3 - 0 - E 7 0 9 - 0 0 0
UNIT FEATURE OPTIONS
1A: Return / Outside Air Section
0 = Standard
2 = Mixing Box - Top and Front Openings
1B: Blank
0 = Standard
1C: Filter Location
0 = Standard
1D: Mixing Box Damper Control
0 = Standard - None
A = 2 Position Actuators (24V)
B = Fully Modulating Actuators (DDC)
C = Fixed Position Dampe r s
2: Waterside Economizer
0 = Standard - None
3: Blank
0 = Standard
4: Maintenance Options
0 = Standard
A = Blower Aux. Contact - Low Voltage Terminal
Block
B = Remote Start/Stop Terminals - Low Voltage
Terminal Block
C = Options A + B
5A: Supply Air Blower Configuration
0 = No Airside - Condensing Unit Only
A = 1 Blower + High Efficiency EC Motor
B = 2 Blowers + High Efficiency EC Motors
5B: Supply Air Blower
0 = No Airside - Condensing Unit Only
A = 310 mm (14”) Direct Drive Backwa rd C ur ve d
Plenum Fan
B = 355 mm (16”) Direct Drive Backward Curved
Plenum Fan
C = 450 mm (18”) Direct Drive Backward Curved
Plenum Fan
0 0 0 0 0 0 0 A B
15
5C: Supply Air Blower Motor
0 = No Airside - Condensing Uni t Only
C = 1.7 kW (2.3 hp)
D = 3.0 kW (4.0 hp)
E = 6.0 kW (8.0 hp)
6A: Pre-Filter Type
0 = No Pre Filter
A = 2” Pleated - 30% Eff. - MERV 8
6B: Unit Filter Type
0 = No Unit Filter
A = 2” Pleated - 30% Eff. - MERV 8
B = 4” Pleated - 30% Eff. - MERV 8
C = 4” Pleated - 65% Eff. - MERV 11
D = 4” Pleated - 85% Eff. - MERV 13
E = 4” Pleated - 95% Eff. - MERV 14
6C: Filter Options
0 = Standard
A = Clogged Filter Switch
B = Magnehelic Gauge
C = Options A + B
7: Refrigeration Control
0 = Standard
C = Freeze Stat - Each Circuit
8: Refrigeration Options
0 = Standard
D = Modulating Hot Gas Reheat
9: Refrigeration Accessories
0 = Standard
A = Sight Glass
B = Compressor Isolation Valves
C = Options A + B
0 0 0 Y - E 0
16
17
18
19
20
21
22
23
12
SB Series Feature String Nomenclature
:
11
0 0 0 Y - E 0
0 0 0
0
15
16
18
Model Options
GEN
SIZE
VLT CONFIG A1
A2
A3
A4 B1
B2
B3 1A
1B
1C
1D 2 3 4 5A
SB - 007 - 3 - 0 - E 7 0 9 - 0 0 0 : 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0
10: Power Options
0 = Standard Power Block
11: Safety Options
0 = Standard
C = Supply Air Smoke Detector
H = Remote Safety Shutoff Terminals
L = Options A + H
12: Controls
0 = Standard
A = Low Limit Controls
B = Phase and Brown Out Protection
C = Options A + B
13: Special Controls
D = VAV Unit Controller - VAV Cool + CV Heat
Y = VAV Single Zone Heat Pump Unit Controller VAV Cool + VAV Heat
Z = Constant Volume Heat Pump Unit Controller CV Cool + CV Heat
1 = Make Up Air Heat Pump Unit Controller - CV
Cool + CV Heat
5 = Field Installed DDC C ontrols by Others with
Isolation Relays
6 = Factory Installed DDC Controls Furnished by
Others with Isolation Relays
14A: Water-Cooled Co ndenser
0 = Standard - None
B = Water Flow Switch
E = Balancing Valves + Option B
H = Motorized Shut-Off Valve + Option B
J = Head Pressure Control + Option B
L = Balancing Valves + Option H
M = Balancing Valves + Option J
T = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option B
W = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option E
1 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option H
2 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option J
4 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option L
5 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option M
14B: Waterside Economizer Piping
0 = Standard - None
15: Glycol Percentage
0 = Standard - None
A = Minimum 20% Propylene Glycol
B = Minimum 40% Propylene Glycol
16: Interior Cabinet Options
0 = Standard - Double Wall Construction + R-6.5
Foam Insulation + Stainless Steel Drain Pan
A = Overflow Switch
B = Compressor Sound Blanket
C = Options A + B
17: Exterior Cabinet Options
0 = Standard
A = AAON Gray Exterior Paint
B = Special Paint
C = Interior Corrosion Protection
D = Options A + C
18: Blank
0 = Standard
Unit Feature Options
5B
5C 6A
6B
6C 7 8 9
10
12
13
14A
14B
0 0 0 A B
19
20
21
22
17
23
13
SB Series Feature String Nomenclature
:
0 0 0 A B
Model Options
GEN
SIZE
VLT CONFIG A1
A2
A3
A4 B1
B2
B3 1A
1B
1C
1D 2 3 4 5A
SB - 007 - 3 - 0 - E 7 0 9 - 0 0 0 : 0 0 0 0 - 0 0 0 - A B C - 0 A 0 - 0 0 0 0 0 0 Y - E 0
19: Code Options
0 = Standard - ETL U.S.A. Listing
20: Crating
0 = Standard
A = Export Crating
B = Forkliftable Base - 5” Base
D = Options A + B
E = Shipping Shrink Wrap
22: Control Vendors
0 = Standard
A = WattMaster Orion Controls System
23: Type
B = Standard
X = Special Pricing Authorization
F = Options B + E
G = Options A + B + E
21: Unit Splits
0 = Standard - One Piece Unit
A = Two Piece Unit - One Compressorized Section +
One Air Tunnel Section
Unit Feature Options
5B
5C 6A
6B
6C 7 8 9
0 0 0 0
15
10
11
12
13
14A
16
17
18
19
20
21
22
14B
23
14
Coils and sheet metal surfaces
be taken when working with
recovery, recycling, or reclaiming
must be followed.
“construction heater” at anytime
during any phase of construction.
Very low return air temperatures,
CAUTION
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
WARNING
General Information
SB Series self contained units have been
designed for indoor installation only. Units
are assembled, wired, charged and runtested at the factory.
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
These units must not be used as a
harmful vapors, and misplacement of
the filters will damage the unit and its
efficiency.
Certification of Steam or Hot Water Heat
Models
a. Certified as a forced air heating system
with cooling.
b. Certified for indoor installation only.
Certification of Electric Heat Models
a. Certified as an electric warm air furnace
with cooling.
b. Certified for indoor installation only.
Certification of Cooling Models
a. Certified as a commercial central air
conditioner with electrically operated
compressors.
b. Certified for indoor installation only.
c. Certified with refrigerant R-410A coils.
Codes and Ordinances
SB Series units have been tested and
certified, by ETL, in accordance with UL
Safety Standard 1995/CSA C22.2 No. 236.
System should be sized in accordance with
the American Society of Heating,
Refrigeration and Air Conditioning
Engineers Handbook.
Installation of units must conform to the
ICC standards of the International
Mechanical Code, the International Building
Code, Installation of Air Conditioning and
Ventilating Systems Standard, NFPA 90A,
and local building, plumbing and waste
water 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.
The Clean Air Act of 1990 bans the
intentional venting of refrigerant as of
July 1, 1992. Approved methods of
present sharp edges and care must
equipment.
15
To prevent motor overheating
compressors must cycle off for a
oil level
compressors must cycle on for a
starts per hour.
WARNING
Failure to observe the following
WARNING
instructions will result in premature
failure of your system and possible
voiding of the warranty.
Receiving Unit
When received, the unit should be checked
for damage that might have occurred in
transit. If damage is found it should be noted
on the carrier’s Freight Bill. A request for
inspection by carrier’s agent should be made
in writing at once.
Nameplate should be checked to ensure the
correct model sizes and voltages have been
received to match the job requirements.
If repairs must be made to damaged goods,
then the factory should be notified before
any repair action is taken in order to protect
the warranty. Certain equipment alteration,
repair, and manipulation of equipment
without the manufacturer’s consent may
void the product warranty. Contact the
AAON Warranty Department for assistance
with handling damaged goods, repairs, and
freight claims: (903) 236-4403.
Note: Upon receipt check shipment for
items that ship loose such as filters and
remote sensors. Consult order and shipment
documentation to identify potential looseshipped items. Loose-shipped items may
have been placed inside unit cabinet for
security. Installers and owners should secure
all doors with locks or nuts and bolts to
prevent unauthorized access.
The warranty card must be completed in full
and returned to AAON not more than 3
months after unit is delivered.
16
Figure 1 - Lockable Handle
Storage
If installation will not occur immediately
following delivery, store equipment in a dry
protected area away from construction
traffic and in the proper orientation as
marked on the packaging with all internal
packaging in place. Secure all loose-shipped
items.
Direct Expansion (DX) Systems
COMPRESSOR CYCLING
5 MINUTE MINIMUM OFF TIME
minimum of 5 minutes.
5 MINUTE MINIMUM ON TIME
To maintain the proper
minimum of 5 minutes.
The cycle rate must not exceed 6
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