AAON ProFit WH Series Owner's manual

ProFit
WH Series
Horizontal Water-Source Heat Pump Units
Installation, Operation
& Maintenance
If the information in this manual is not
followed exactly, a fire may result
causing property damage, personal
injury, or loss of life.
WARNIN
G
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.
Keep a copy of this IOM with the unit.
WARNIN
G

3
Table of Contents
AAON ProFit Features and Options Introduction .......................................................................... 5
Safety .............................................................................................................................................. 6
WSHP Series Feature String Nomenclature ................................................................................. 10
General Information...................................................................................................................... 12
Codes and Ordinances .............................................................................................................. 12
Receiving Unit .......................................................................................................................... 13
Storage ...................................................................................................................................... 13
Direct Expansion (DX) Systems............................................................................................... 13
Wiring Diagrams....................................................................................................................... 14
Installation..................................................................................................................................... 15
Locating the Unit ...................................................................................................................... 15
Condensate Drain Piping .......................................................................................................... 16
Blower Assembly Removal – Side Access............................................................................... 18
Lifting and Handling the Unit................................................................................................... 19
Blower Motor and Fan Access.................................................................................................. 19
Refrigerant-to-Water Heat Exchanger Water Piping................................................................ 20
Electrical ................................................................................................................................... 24
Duct Connection ....................................................................................................................... 27
Startup........................................................................................................................................... 29
Supply Fans............................................................................................................................... 29
Fan Air Flow Adjustment ......................................................................................................... 29
Adjusting Refrigerant Charge................................................................................................... 30
Operation....................................................................................................................................... 33
AAON WSHP Pioneer Silver Controller.................................................................................. 33
Maintenance.................................................................................................................................. 39
DX Cooling............................................................................................................................... 39
Condensate Drain Pans ............................................................................................................. 39
Supply Fans............................................................................................................................... 39
Filter Replacement.................................................................................................................... 39
Replacement Parts..................................................................................................................... 40
Warranty, Service, and Parts Department................................................................................. 40
Filter Information.......................................................................................................................... 40
Appendix A - Heat Exchanger Corrosion Resistance................................................................... 43
V01030 ·Rev. A ·220720

4
Index of Tables and Figures
Tables:
Table 1 - Clearances...................................................................................................................... 17
Table 2 - Glycol Concentration.................................................................................................... 21
Table 3 - Water Connections ........................................................................................................ 22
Table 4 - Nameplate Voltage Markings & Tolerances ................................................................. 24
Table 5 - Control Wiring............................................................................................................... 26
Table 6 - Acceptable Refrigeration Circuit Values at AHRI ISO 13256 WLHP Conditions....... 31
Table 7 - R-410A Refrigerant Temperature-Pressure Chart......................................................... 32
Table 8 - LED Diagnostic Codes.................................................................................................. 37
Table 9 - Glycol Percentage Setpoints.......................................................................................... 38
Table 10 - 006-012 WH Unit Series Filters (A Cabinet).............................................................. 40
Table 11 - 015 & 018 WH Series Unit Filters (B Cabinet) .......................................................... 41
Table 12 - 024 & 030 WH Series Unit Filters (C Cabinet) .......................................................... 41
Table 13 - 036 & 042 WH Series Unit Filters (D Cabinet) .......................................................... 42
Table 14 - 048 & 060 WH Series Unit Filters (E Cabinet)........................................................... 42
Figures:
Figure 1 - Access Panels............................................................................................................... 13
Figure 2 - Foam Shipping Block................................................................................................... 15
Figure 3 - Mounting Horizontal Units .......................................................................................... 15
Figure 4 - Vibration Grommet Installation ................................................................................... 15
Figure 5 - Condensate Drain Piping.............................................................................................. 16
Figure 6 - Drain Trap .................................................................................................................... 17
Figure 7 – Horizontal Configuration Orientations........................................................................ 17
Figure 8 - Blower Assembly with Captive Panel.......................................................................... 18
Figure 9 - Blower Assembly, Shown Pulled Away From Blower Panel...................................... 18
Figure 10 - Filter Rack Closed with Clip...................................................................................... 27
Figure 11 – Filter Rack Open with Clip........................................................................................ 27
Figure 12 - Using the Filter Pull ................................................................................................... 27
Figure 13 - WSHP Series Supply Fan .......................................................................................... 29
Figure 14 - Pioneer Silver Controller Layout ............................................................................... 35

5
AAON ProFit Features and Options Introduction
Energy Efficiency
Direct Drive Supply Fan
Scroll or Rotary Compressor
High Efficiency Electronically
Commutated (EC) Motor
Copper Coaxial Refrigerant-to-Water-
Heat Exchanger
AHRI Certified Performance
Indoor Air Quality
Stainless Steel Drain Pan
Controls
5 Wire Thermostat Control
Installation and Maintenance
Color-Coded Wiring and Wiring
Diagram
Environmentally Friendly
R-410A Refrigerant
Extended Life
Sturdy Galvanized Steel Construction
Induction Brazing
Stainless Steel Drain Pan
5 Year Parts Warranty
Reduced Sound
Compressors Mounted with Rubber-in-
Shear Isolators on an Isolation Plate with
Rubber-in-Shear Isolation to the Cabinet
Sound Absorbing Fiberglass Cabinet
Insulation
Floating Water Connections

6
Safety
Rotation must be checked on all
COMPRESSORS AND MOTORS 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 for proper operation,
without using external refrigerant
pressure gauges. Often, a
compressor running in reverse
rotation will be much louder than a
normal compressor, and will not
develop much of a temperature
differential between the suction and
discharge lines.
Fan motor rotation must also be
checked for proper operation.
Alterations must only be made at the
unit power connection.
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.
Cleaning the cooling tower or the
water loop with harsh chemicals, such
as hydrochloric acid (muriatic acid) or
chlorine, can damage the refrigerant-
to-water heat exchanger. Care must
be taken to avoid allowing chemicals
to enter the refrigerant-to-water heat
exchanger. See Appendix A - Heat
Exchanger Corrosion Resistance for
more information.
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.
CAUTION
CAUTION
CAUTION

7
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.
OPEN LOOP APPLICATIONS
Failure of the refrigerant-to-water heat
exchanger as a result of chemical
corrosion is excluded from coverage
under AAON Inc. warranties and the
heat exchanger manufacturer’s
warranties.
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.
Do not work in a closed area where
refrigerant or nitrogen gases may be
leaking. A sufficient quantity of vapors
may be present and cause injury or
death.
UNIT HANDLING
To prevent injury or death lifting
equipment capacity must 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.
ELECTRIC SHOCK AND FIRE
HAZARD
Failure to follow safety warnings
exactly could result in dangerous
operation, serious injury, death or
property damage.
Improper servicing could result in
dangerous operation, serious injury,
death, or property damage.
Before servicing, disconnect all
electrical power to the unit to avoid
shock hazard or injury from
rotating parts. Follow proper
Lockout-Tagout procedures.
When servicing controls, label all
wires prior to disconnecting.
Reconnect wires correctly.
Verify proper operation after
servicing. Secure all service
panels.
CAUTION
WARNING
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WARNIN
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WARNING

8
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.
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 must
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.
ROTATING COMPONENTS
Unit contains fans with moving parts
that can cause serious injury. Do not
remove panel containing fans until the
power to the unit has been
disconnected and fan has stopped
rotating.
WATER FREEZING
Failure of the refrigerant-to-water heat
exchanger due to freezing will allow
water to enter the refrigerant circuit
and will cause extensive damage to
the refrigerant circuit components.
Any damage to the equipment as a
result of water freezing is excluded
from coverage under AAON
warranties and the heat exchanger
manufacturer warranties.
WATER PRESSURE
Prior to connection of condensing
water supply, verify water pressure is
less than maximum pressure shown
on unit nameplate. To prevent injury
or death due to instantaneous release
of high pressure water, relief valves
must be field supplied on system
water piping.
WARNIN
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WARNIN
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WARNIN
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WARNIN
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WARNIN
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9
1. READ THE ENTIRE INSTALLATION,
OPERATION AND MAINTENANCE
MANUAL. OTHER IMPORTANT
SAFETY PRECAUTIONS ARE
PROVIDED THROUGHOUT THIS
MANUAL.
2. Startup and service must be performed by
a Factory Trained Service Technician.
3. The unit is for indoor use only. See
General Information section for more unit
information.
4. 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.

10
WSHP Series Feature String Nomenclature
Unit Configuration :Accessory Options
Gen
Major Rev
Size
Series
Minor Rev
Voltage
Eff. Level
Comp Style
Loop Type
Coil Type
Heat Type
Heat Staging
1 2
3A
3B
4 5
6A
6B
7 8 9
10 11 12 13 14 15 16
WH B - 024 - C - 0 - 3 - 1 - 0 0 0 - 0 0
: 0 0 - 0 E - 0 0 - 0 0 - 0 0 0 0 0 - 0 A 0 0 0
MODEL OPTIONS
Generation and Orientation
WH = Horizontal Water-Source Heat Pump
Major Revision
B = ProFit
Unit Size
006 = 6,000 Btu/hr = ½ ton
009 = 9,000 Btu/hr = ¾ ton
012 = 12,000 Btu/hr = 1 ton
015 = 15,000 Btu/hr = 1 ¼ ton
018 = 18,000 Btu/hr = 1 ½ ton
024 = 24,000 Btu/hr = 2 ton
030 = 30,000 Btu/hr = 2 ½ ton
036 = 36, 000 Btu/hr = 3 ton
042 = 42,000 Btu/hr = 3 ½ ton
048 = 48,000 Btu/hr = 4 ton
060 = 60,000 Btu/hr = 5 ton
Series
A = A Cabinet (006, 009 & 012)
B = B Cabinet (015 & 018)
C = C Cabinet (024 & 030)
D = D Cabinet (036 & 042)
E = E Cabinet (048 & 060)
Minor Revision
0 = Minor Revision 0
Voltage
3 = 460V/3Φ/60Hz
4 = 575V/3Φ/60Hz
A = 265V/1Φ/60Hz
B = 115V/1Φ/60Hz
C = 208-230V/1Φ/60Hz
D = 208-230V/3Φ/60Hz
Efficiency Level
0 = Std Efficiency Compact Box
Compressor Style
0 = R-410A On/Off Compressor - Heat Pump
Loop Type
0 = Water Loop (Cooling Tower Only, EWT ≥60°F)
A = Ground Loop Application
B = Ground Water Application
Coil Type
0 = Copper Coaxial Refrigerant-to-Water Heat
Exchanger + Fin & Tube Condenser Coil
Heat Type
0 = No Heating
Heating Staging
0 = No Heating
1: Unit Orientation
0 = Right Hand Return + Left Hand Supply
A = Right Hand Return + End Supply
B = Left Hand Return + Right Hand Supply
C = Left Hand Return + End Supply
2: Supply Fan
B = Standard Fan + ECM Motor
3A: Filter Rack
0 = Open Return - Slide-Out Filter Rack
3B: Filters
A = 2” MERV 8 Pleated Filter
E = 1” MERV 8 Pleated Filter
F = 1” MERV 11 Pleated Filter
G = 1” MERV 13 Pleated Filter
I = 1” Fiberglass Filter
J = 2” Fiberglass Filter
K= 2” MERV 11 Pleated Filter
L = 2” MERV 13 Pleated Filter
4: Refrigeration and Dehumidification Options
0 = Standard