AAON SB-018 User Manual
vicinity of this or any other appliance.
WARNING
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage,
y or loss of life.
Installation and service must be
WARNING
SB Series
Vertical Self Contained Units
Installation, Operation
& Maintenance
personal injur
performed by a trained, qualified
installer. 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 Base Model Description .......................................................................................................... 10
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
Floor Mounted Units ............................................................................................................. 18
Lifting and Handling the Unit ................................................................................................... 19
Refrigerant-to-Water Heat Exchanger Water Piping ................................................................ 19
Open Loop Applications ....................................................................................................... 19
Freezing Water in the Heat Exchanger ................................................................................. 20
Water Piping ......................................................................................................................... 21
Electrical ................................................................................................................................... 23
Cutting Electrical Openings .................................................................................................. 23
Thermostat Control Wiring ................................................................................................... 25
Duct Connection ....................................................................................................................... 25
Condensate Drain Piping .......................................................................................................... 26
Waterside Economizer .............................................................................................................. 26
Heating Coils ............................................................................................................................ 27
Startup ........................................................................................................................................... 27
Supply Fans ............................................................................................................................... 28
Supply Fan Airflow Adjustment ........................................................................................... 28
Filters ........................................................................................................................................ 31
Adjusting Refrigerant Charge ................................................................................................... 31
Operation....................................................................................................................................... 34
Packaged DX Cooling Operation and Control .......................................................................... 34
Electric Heating Operation ....................................................................................................... 34
Steam or Hot Water Preheating Operation ............................................................................... 34
Maintenance .................................................................................................................................. 34
DX Cooling ............................................................................................................................... 34
Condensate Drain Pans ............................................................................................................. 34
E-Coated Coil Cleaning ............................................................................................................ 35
Recommended Coil Cleaner ................................................................................................. 35
Recommended Chloride Remover ........................................................................................ 36
Supply Fans ............................................................................................................................... 36
Filter Replacement .................................................................................................................... 37
Replacement Parts ..................................................................................................................... 37
AAON Longview Product Support ........................................................................................... 37
Filter Information .......................................................................................................................... 37
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 39
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 ................................................................................................. 26
Table 6 - Acceptable Water-Cooled Refrigeration Circuit Values ............................................... 32
Table 7 - R-410A Refrigerant Temperature-Pressure Chart ......................................................... 33
Table 8 - 3-5 ton (B Cabinet) Pre and Unit Filters ....................................................................... 37
Table 9 - 6-10 ton (C Cabinet) Pre and Unit Filters ..................................................................... 37
Table 10 - 14-18 ton (D Cabinet) Pre and Unit Filters ................................................................. 38
Table 11- 3-5 ton (B Cabinet) Mixing Box Filters ....................................................................... 38
Table 12 - 6-10 ton (C Cabinet) Mixing Box Filters .................................................................... 38
Table 13 - 14-18 ton (D Cabinet) Mixing Box Filters .................................................................. 38
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 ................................................................................................... 28
Figure 6 - ECM with Factory Provided Controls.......................................................................... 29
Figure 7 - ECM with Potentiometer Control ................................................................................ 29
Figure 8 - ECM with Field Installed Controls .............................................................................. 30
V14190 · Rev. A · 121227
(ACP 31227)
4
Attention should be paid to the following statements:
ELECTRIC SHOCK, FIRE OR
Failure to follow safety warnings
exactly could result in dangerous
operation, serious injury, death or
Improper servicing could result in
Before servicing, disconnect all
than one disconnect may be
wires prior to disconnecting.
Verify proper operation after
Electric shock hazard. Before
servicing, disconnect all electrical
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
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
property damage.
dangerous operation, serious injury,
death or property damage.
electrical power to the unit. More
provided.
When servicing controls, label all
Reconnect wires correctly.
servicing. Secure all doors with
key-lock or nut and bolt.
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.
5
All field installed wiring must be
completed by qualified personnel.
Field installed wiring must comply
with NEC/CEC, local and state
to follow code requirements could
result in serious injury or death.
Provide proper unit ground in
accordance with these code
WARNING
electrical components. Only a
qualified licensed electrician or
electrical components shall
70E, an OSHA
regulation requiring an Arc Flash
marked for identification of where
appropriate Personal Protective
To prevent injury or death lifting
power to the unit has been
disconnected and fan wheel has
During installation, testing, servicing
and troubleshooting of the equipment
it may be necessary to work with live
individual properly trained in handling
live
perform these tasks.
Standard NFPA-
Boundary to be field established and
Equipment (PPE) be worn, should be
followed.
GROUNDING REQUIRED
electrical code requirements. Failure
requirements.
6
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.
Failure to properly drain and vent
coils when not in use during freezing
temperature may result in coil and
equipment damage.
Prior to connection of condensing
or death due to instantaneous
not use alkaline chemical coil
WARNING
CAUTION
in place of refrigerant and dry
Always use a pressure regulator,
ges to control
A sufficient quantity of
on all
should be checked for proper
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
nitrogen for leak testing. A violent
explosion may result causing injury or
death.
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
cleaners with a pH value greater than
8.5, after mixing, without first using
an aluminum corrosion inhibitor in the
cleaning solution.
7
Some chemical coil cleaning
Failure to follow
Door compartments containing
h door latches to
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
of chemical corrosion is excluded
Failure of the condenser due to
refrigerant circuit and will cause
from coverage under AAON
manufacturer warranties.
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
410A and other
and complete piping
system failure.
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 wit
allow locks. Door latch are shipped
with nut and bolts requiring tooled
access. If you do not replace the
shipping hardware with a pad lock
always re-install the nut & bolt after
closing the door.
Cleaning the
chemicals, such as hydrochloric acid
damage the water-cooled condenser.
waterAppendix A -
information.
8
OPEN LOOP APPLICATIONS
Failure of the condenser as a result
from coverage under AAON Inc.
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
warranties and the heat exchanger
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
used with Rrefrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings
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. The unit is for indoor use only. See
General Information section for more
unit information.
2. 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.
3. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
4. Keep this manual and all literature
safeguarded near or on the unit.
9
Series and
Generation
Unit
Size
Configuration/Interior
Protection
Model Number
SB Base Model Description
SB
BASE MODEL
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
007 3
-
-
Voltage
0
-
E 7 0 9
-
A1 A2 A3 A4
-
Model Option A: COOLING/HEAT
PUMP
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
D = Stainless Steel Cooling Coil Casing
A4: COOLING/HEAT PUMP STAGING
9 = Modulating - Variable Capacity Compressor
10
Model/Feature Number
SB Base Model and Features Description
0 0 0
:
B1 B2 B3 1A 1B 1C 1D 2 3 4
Model Option B: HEATING
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
0 0 0 0
Feature 1: RETURN/OUTSIDE AIR
1A: RETURN/OUTSIDE AIR SECTION
0 = Standard
1 = Mixing Box - Front and Front Openings
2 = Mixing Box - Top and Front Openings
3 = Mixing Box - Front and Right Openings
4 = Mixing Box - Front and Left Openings
5 = Mixing Box - Top and Right Openings
6 = Mixing Box - Top and Left Openings
1B: BLANK
0 = Standard
1C: FILTER LOCATION
0 = Standard
A = Mixing Box Filters
1D: MIXING BOX DAMPER CONTROL
0 = Standard - None
A = 2 Position Actuators (24V)
B = Fully Modulating Actuators (DDC)
C = Fixed Position Dampers
Feature 2: WATERSIDE
ECONOMIZER
0 = Standard - None
A = Waterside Economizer - 4 Row Single
Serpentine 12 FPI Coil
B = Waterside Economizer - 6 Row Single
Serpentine 12 FPI Coil
Feature 3: BLANK
0 = Standard
Feature 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
-
0 0 0
-
11
Feature Number
SB Features Description
A B C
-
5A 5B 5C 6A 6B 6C 7 8 9 10 11 12
Feature 5: SUPPLY AIR OPTIONS
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 Backward Curved
Plenum Fan
B = 355 mm (16”) Direct Drive Backward Curved
Plenum Fan
C = 450 mm (18”) Direct Drive Backward Curved
Plenum Fan
5C: SUPPLY AIR BLOWER MOTOR
0 = No Airside - Condensing Unit Only
C = 1.7 kW (2.3 hp)
D = 3.0 kW (4.0 hp)
E = 6.0 kW (8.0 hp)
Feature 6: FILTERS
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
F = 4” Carbon
G = Options C + F
H = Options D + F
J = Options E + F
K = Options C + D
L = Options C + E
6C: FILTER OPTIONS
0 = Standard
A = Clogged Filter Switch
B = Magnehelic Gauge
C = Options A + B
0 A 0
-
0 0 0 0 0 0
Feature 7: REFRIGERATION
CONTROL
0 = Standard
C = Freeze Stat - Each Circuit
Feature 8: REFRIGERATION OPTIONS
0 = Standard
D = Modulating Hot Gas Reheat
Feature 9: REFRIGERATION
ACCESSORIES
0 = Standard
A = Sight Glass
B = Compressor Isolation Valves
C = Options A + B
Feature 10: POWER OPTIONS
0 = Standard Power Block
Feature 11: SAFETY OPTIONS
0 = Standard
C = Supply Air Smoke Detector
H = Remote Safety Shutoff Terminals
L = Options A + H
Feature 12: CONTROLS
0 = Standard
A = Low Limit Controls
B = Phase and Brown Out Protection
C = Options A + B
12
Feature Number
SB Features Description
D
-
13 14A 14B 15
Feature 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
4 = Field Installed DDC Controls by Others
5 = Field Installed DDC Controls by Others with
Isolation Relays
6 = Factory Installed DDC Controls Furnished by
Others with Isolation Relays
Feature 14: WATER-COOLED
CONDENSER AND WATERSIDE
ECONOMIZER
14A: WATER-COOLED CONDENSER
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 + Motorized Shut-Off Valve +
Option B
M = Balancing Valves + Head Pressure Control +
Option B
T = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Option B
W = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Balancing Valves + Option B
1 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Motorized Shut-Off Valve + Option B
2 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Head Pressure Control + Option B
4 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Balancing Valves + Motorized Shut-Off
Valve + Option B
5 = CuNi Corrosion Resistant Coaxial Heat
Exchanger + Balancing Valves + Head Pressure
Control + Option B
E 0
-
14B: WATERSIDE ECONOMIZER PIPING
0 = Standard - None
A = Variable Water Flow Application Field Piped
Waterside Economizer
B = Constant Water Flow Application Field Piped
Waterside Economizer
C = Variable Water Flow Application Factory Piped
Waterside Economizer
D = Constant Water Flow Application Factory Piped
Waterside Economizer
Feature 15: GLYCOL PERCENTAGE
0 = Standard - None
A = Minimum 20% Propylene Glycol
B = Minimum 40% Propylene Glycol
0
13
Feature Number
SB Features Description
0 0 0 0 0 0 A B
16 17 18 19 20 21 22 23
Feature 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
Feature 17: EXTERIOR CABINET
OPTIONS
0 = Standard
A = AAON Gray Exterior Paint
B = Special Paint
C = Interior Corrosion Protection
D = Options A + C
Feature 18: WARRANTY
0 = Standard
A = Second to Fifth Year Extended Compressor
Warranty
Feature 19: CODE OPTIONS
0 = Standard - ETL U.S.A. Listing
Feature 20: CRATING
0 = Standard
A = Export Crating
B = Forkliftable Base - 5” Base
D = Options A + B
E = Shipping Shrink Wrap
F = Options B + E
G = Options A + B + E
Feature 21: UNIT SPLITS
0 = Standard - One Piece Unit
A = Two Piece Unit - One Compressorized Section +
One Air Tunnel Section
Feature 22: CONTROL VENDORS
0 = Standard
A = WattMaster Orion Controls System
E = Remote Mounted AAON Mini Controller
Feature 23: TYPE
B = Standard
X = Special Pricing Authorization
14
Improper installation, adjustment,
service or maintenance
can cause property damage,
personal injury or loss of life.
Installation and service must be
recovery, recycling, or reclaiming
must be followed.
Coils and sheet metal surfaces
working with
WARNING
“construction heater” at anytime
during any phase of construction.
Very low return air temperatures,
CAUTION
General Information
SB Series self contained units have been
designed for indoor installation only. Units
are assembled, wired, charged and runtested at the factory.
alteration,
performed by a qualified installer. 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
be taken when
equipment.
15
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