Firstco R-410A Water Source Heat Pump Instruction Manual
- June 16, 2024
- FIRSTCO
Table of Contents
- Firstco R-410A Water Source Heat Pump
- Product Information
- Safety Considerations
- Installation
- Operation
- Maintenance & Service
- Troubleshooting
- FAQ
- Installation, Operation, & Maintenance Manual
- INTRODUCTION
- UNIT INSPECTION CHECKLIST
- COMMON CONVERSIONS
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Firstco R-410A Water Source Heat Pump
Product Information
Specifications
- Model: WSH6 009-072 Horizontal Series Water Source Heat Pump
- Installation, Operation, & Maintenance Manual: IOM 8003 Rev. A 5/23
Safety Considerations
- READ THE ENTIRE MANUAL BEFORE STARTING THE INSTALLATION.
- These instructions are intended as a general guide and do not supersede national, state, or local codes in any way.
- Altering the product, improper installation, or the use of unauthorized factory parts voids all warranty or implied warranty.
RECOGNIZE THE FOLLOWING SAFETY NOTATIONS THROUGHOUT THIS MANUAL AND POSTED ON THE EQUIPMENT:
- Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
- Suggests important procedure steps to ensure proper installation, reliability, or operation.
- Indicates a potentially hazardous situation or unsafe practices that could result in severe personal injury or death and/or damage to property.
- This warning signifies potential electrical shock hazards that could result in personal injury or death.
- The CAUTION symbol indicates a potentially hazardous situation that may result in minor or moderate injury.
- Used to highlight suggestions, which may result in enhanced installation, reliability, or operation.
Installation
- Before starting the installation, read the entire manual.
- Ensure that national, state, and local codes are followed during installation.
- Do not alter the product or use unauthorized factory parts.
Operation
- Follow the startup instructions to ensure proper operation of the water source heat pump.
- Label all wires before disconnecting when servicing controls. Reconnect wires correctly.
- Verify proper operation after servicing.
Maintenance & Service
- Regularly inspect and clean mechanical components and filtersto prevent clogging and damage to the system.
- Improper servicing could result in dangerous operation, serious injury, death, or property damage.
- Before servicing, disconnect all electrical power to the WSH6 water source heat pump.
Troubleshooting
If you encounter any issues with the product, refer to the troubleshooting section in the manual for guidance.
FAQ
Q: What should I do if I notice damage to the product upon delivery?
A: If you notice any evidence of rough handling or apparent damage to the
product upon delivery, it is important to note it on the delivery receipt in
the presence of the carrier’s representative. You should also immediately file
a claim against the carrier.
Installation, Operation, & Maintenance Manual
IOM 8003 Rev. A 5/23
WSH6 009-072 Horizontal Series Water Source Heat Pump
WSH6 HORIZONTAL SERIES – IOM
COPYRIGHT
First Co. / AE-Air works to continuously improve its products and as a result,
it reserves the right to change design and specifications without notice. The
warranty may be void unless the Startup & Performance Checklist is completed
and returned to the warrantor. If the HVAC unit is not installed properly, the
warranty will be void, as the manufacturer cannot be held accountable for
problems that stem from improper installation. ©2023 First Co. / AE-Air, 8273
Moberly Lane, Dallas, TX 75227
WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER
Altering the product or replacing parts with non-authorized factory parts
voids all warranty or implied warranty and may result in adverse operational
performance and/or a possible hazardous safety condition to service personnel
and occupants. Company employees and/or contractors are not authorized to
waive this warning.
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TABLE OF CONTENTS
SAFETY CONSIDERATIONS MODEL NOMENCLATURE GENERAL INFORMATION INTRODUCTION
STORAGE SHIPPING & PACKAGE LIST UNIT INSPECTION CHECKLIST UNIT DIMENSIONAL
DATA UNIT PHYSICAL DATA ELECTRICAL DATA INSTALLATION ELECTRICAL APPLICATION
CONTROLS PERFORMANCE DATA WIRING DIAGRAMS CIRCUIT SCHEMATIC STARTUP
INSTRUCTIONS STARTUP & PERFORMANCE CHECKLIST INSTRUCTIONS MAINTENANCE &
SERVICE TROUBLESHOOTING SUPPORT/REFERENCE MATERIAL STARTUP & PERFORMANCE
CHECKLIST NOTES
WSH6 HORIZONTAL SERIES – IOM
4-5 6 7 7 8 8 9
10-11 12 13
14-21 22
23-25 26-31 32-43 44-48
49 49-50
50 51 52-55 56 57 58-59
WSH6 HORIZONTAL SERIES IOM
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SAFETY CONSIDERATIONS
1. READ THE ENTIRE MANUAL BEFORE STARTING THE INSTALLATION. 2. These
instructions are intended as a general guide and do not supersede national,
state, or local codes in any way. 3. Altering the product, improper
installation, or the use of unauthorized factory parts voids all warranty or
implied warranty
and may result in adverse operation and/or performance or may result in
hazardous conditions to service personnel and occupants. Company employees or
contractors are not authorized to waive this warning. 4. This product should
only be installed and serviced by a qualified, licensed, and factory
authorized installer or service agency. 5. All “kits” and “accessories” used
must be factory authorized when modifying this product. Refer and follow
instructions packaged with the kits or accessories when installing.
RECOGNIZE THE FOLLOWING SAFETY NOTATIONS THROUGHOUT THIS MANUAL AND POSTED ON THE EQUIPMENT:
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Suggests important procedure steps to insure proper installation, reliability, or operation.
Indicates a potentially hazardous situation or unsafe practices that could result in severe personal injury or death and/or damage to property.
This warning signifies potential electrical shock hazards that could result in personal injury or death.
The CAUTION symbol indicates a potentially hazardous situation that may result in minor or moderate injury.
Used to highlight suggestions, which may result in enhanced installation, reliability or operation.
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 WSH6 water source
heat pump.
When servicing controls, label all wires prior to disconnecting. Reconnect
wires correctly.
Verify proper operation after servicing.
4
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SAFETY CONSIDERATIONS CONTINUED
WSH6 HORIZONTAL SERIES – IOM
Mechanical components and filters can become clogged with dirt and debris, which can cause damage to the system. The manufacturer does not warrant equipment subjected to abuse. Construction debris can void warranties and liability for equipment failure, personal injury, and property damage.
Material in this shipment has been inspected at the factory and released to the transportation agency in good condition. When received, a visual inspection of all cartons should be made immediately. Any evidence of rough handling or apparent damage should be noted on the delivery receipt in the presence of the carrier’s representative. If damage is found, a claim should be immediately filed against the carrier.
DO NOT USE FOR HEATING AND COOLING BUILDINGS OR STRUCTURE UNDER CONSTRUCTION!
Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury or loss of life. Refer to the user’s information manual provided with this water source heat pump. Installation and materials, service must be performed by a qualified installer, or service agency.
Installation and service must be performed by a licensed professional installer (or equivalent), or service agency. Attempting to install or repair this unit without such background may result in product damage, personal injury or death.
These instructions are intended as an aid to qualified, licensed service
personnel for proper installation, adjustment and operation of this unit. Read
these instructions thoroughly before attempting installation or operation.
Failure to follow these instructions may result in improper installation,
adjustment, service or maintenance possibly resulting in fire, electrical
shock, property damage, personal injury or death.
WSH6 HORIZONTAL SERIES IOM
Disconnect all power before servicing. Failure to do so may result in property damage, personal injury, or death.
Use care when handling compressors. Some surfaces could be hot!
Compressors should NOT be used to evacuate the air conditioning system. Vacuums this low can cause internal electrical arcing resulting in a damaged or failed compressor.
The unit must be permanently grounded. Failure to do so can cause electrical shock resulting in severe personal injury or death.
“USE COPPER SUPPLY WIRES ONLY!”
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MODEL NOMENCLATURE
FIGURE 1 Model Nomenclature
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GENERAL INFORMATION
DO NOT use these units as a source of heating or cooling during the
construction process. Mechanical components and filters can become clogged
with dirt and debris, which can cause damage to the system.
The manufacturer does not warrant equipment subjected to abuse.
Before servicing equipment, ALWAYS turn off all power to the unit. There may
be more than one disconnect switch. Electrical shock can cause injury or
death.
Clear surrounding area of all tools, equipment, and debris before operating
this unit.
These instructions are provided for the installation of the WSH6 water source
heat pump specifically. For any other related equipment, refer to the
appropriate manufacturer’s instructions.
This water source heat pump must never be operated under any circumstances without an air filter in place.
Material in this shipment has been inspected at the factory and released to
the transportation agency in good condition. When received, a visual
inspection of all cartons should be made immediately. Any evidence of rough
handling or apparent damage should be noted on the delivery receipt in the
presence of the carrier’s representative. If damage is found, a claim should
be immediately filed against the carrier.
The WSH6 water source heat pump is designed for indoor installation only.
Installation of this equipment, wiring, ducts, and any related components must
conform to current agency codes, state laws, and local codes. Such regulations
take precedence over general instructions contained in this manual.
WSH6 HORIZONTAL SERIES – IOM
Extreme caution must be taken that no internal damage will result from screws that are drilled into the cabinet.
INTRODUCTION
The HydroTech WSH6 series water to air heat pump provide the best combination
of performance, efficiency and reliability in a compact form factor. The WSH6
series comes standard with ECM blower motors for high efficiency and comfort.
All WSH6 models feature double compressor vibration isolation for quiet
operation, easy to remove blower housing for quick service, as well as a
single compressor designs to lower system complexity and improve
serviceability.
All WSH6 models are certified to AHRI ISO Standard 132561. The WSH6 models are
designed to operate with fluid temperatures between 50°F to 110°F in cooling
mode and 50°F to 90°F in heating mode for continuous operation. For operation
below 50°F or above 90°F entering water temperature, extended range (insulated
tubing) option is needed, and sufficient water flow is required to prevent
freezing. Antifreeze solution is required for any application with entering
water below 50 degree F.
Cooling Tower/Boiler and Geo Thermal applications should have sufficient
antifreeze solution when required to protect against extreme conditions and
equipment failure. Frozen water coils are not covered under warranty.
These installation instructions are intended as a general guide only, for use
by an experienced, qualified contractor.
Do not use this water source heat pump during any phase of construction.
WSH6 HORIZONTAL SERIES IOM
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STORAGE
Equipment should be stored in a clean dry, conditioned area with maximum
temperatures up to 120°F [48.89°C] and minimum temperatures to 32°F [0°C].
Units should be stored upright as seen in FIGURE 2 Standard Packaging and in
an indoor environment. It is recommended to leave packaging on the unit until
the installation is to begin.
Do not stack more than THREE units for storage purposes. Store units how they
are shipped, keeping them crated and on their pallets for protection. Failure
to follow these instructions may result in improper installation, adjustment,
service or maintenance, property damage, personal injury or death.
DO NOT operate these units during the construction process. Mechanical
components and filters could become clogged with dirt and debris, which can
cause damage to the system.
The manufacturer does not warrant equipment subjected to abuse.
SHIPPING & PACKAGE LIST
Material in this shipment has been inspected at the factory and released to
the transportation agency in good condition. When received, a visual
inspection of all cartons should be made immediately. Any evidence of rough
handling or apparent damage should be noted on the delivery receipt in the
presence of the carrier’s representative. If damage is found, a claim should
be immediately filed against the carrier.
SHIPPING INSTRUCTIONS
WSH6 units must remain in the upright position as seen in FIGURE 2 Standard
Packaging throughout the shipping and handling process to maintain a proper
level of oil in the compressor.
Shrink-wrap is located around the unit for protection. Remove before installation.
FIGURE 2 Standard Packaging
PACKAGE LIST
The units will be shipped with the following items:
1- WSH6 unit sizes 009-036: A- Shipping/Hanger brackets a. Screws (4) b.
Washer (4) c. Vibration Isolation Grommet (4) WSH6 unit sizes 042-72: B-
Shipping/Hanger brackets a. Screws (5) b. Washer (5) c. Vibration Isolation
Grommet (5)
2- Literature package A- IOM – Installation & Operations Manual
Check the unit for shipping damage; if found, immediately contact the last
carrier.
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WSH6 HORIZONTAL SERIES IOM
UNIT INSPECTION CHECKLIST
Complete the inspection procedures below before preparing unit for installation:
- Visually inspect unit for any shipping damage. Damage must be reported immediately to the shipping company to make a claim.
- Ensure that the carrier makes proper notation of any shortages or damage on all copies of the freight bill and completes a common carrier inspection report.
- Verify that unit nameplates on the data label match the sales order or bill of lading (including, unit configuration, size and voltage).
- Immediately before installation, remove unit front panel and verify that all electrical connections are tight and that there are no loose wires.
- Check to make sure that the refrigerant piping is free from any kinks and there is no interference between unit piping and sheet metal, electrical wires or other piping.
- Check the correct blower rotation, make sure it spins freely within the housing and that there are no obstructions between the wheel and housing. The wheel can sometimes come loose in shipping.
- Ensure that the evaporator distributor tubes are not touching one in another and that they are over the drain pan.
- Check the air-coil fins for any damage during shipping. 9) Ensure that the
shipping screws and shipping brackets
are removed from the unit. Refer to FIGURE 3 Standard Packaging with Brackets Front View & FIGURE 4 Standard Packaging with Brackets Back View for more information. 10) Prior to starting the unit, it is necessary to fully loosen the compressor bolts, and re-tighten them finger tight. 11) When the unit has less than 100 operational hours and the coils have not had sufficient time to be “seasoned”, it is necessary to clean the dry coil with a mild surfactant such as Calgon to remove the oils left by manufacturing processes.
Check the unit nameplate for correct voltage with the plans before installing the equipment. Also, make sure all electrical ground connections are made in accordance with local code.
WSH6 HORIZONTAL SERIES – IOM
FIGURE 3 Standard Packaging with Brackets Front View FIGURE 4 Standard
Packaging with Brackets Back View
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UNIT DIMENSIONAL DATA
FIGURE 5 Unit Dimensions
10
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UNIT DIMENSIONAL DATA CONTINUED
WSH6 HORIZONTAL SERIES – IOM
FIGURE 6 Unit Configurations
MODEL
WSH6009 WSH6012 WSH6018 WSH6024 WSH6030 WSH6036 WSH6042 WSH6048 WSH6060
WSH6072
OVERALL CABINET
Width Depth Height
A
B
C
22.1 41.1 17.0
22.1 41.1 17.0
22.1 48.1 17.0
25.1 60.1 21.0
25.1 60.1 21.0
25.1 60.1 21.0
25.1 74.1 21.0
25.1 74.1 21.0
25.1 74.1 21.0
25.1 84.1 21.0
DIMENSIONAL DATA
WATER CONNECTIONS
Loop In/Out
D
E
F
14.6
4.9
1.6
14.6
4.9
1.6
14.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
18.6
4.9
1.6
Table 1 Unit Dimensional Data
LOOP IN/OUT
FTP
3/4 3/4 3/4 3/4 3/4 3/4 1 1 1 1
ELECTRICAL KNOCKOUTS
G
H
I
J
1.5
11.0
1.2
9.0
1.5
11.0
1.2
9.0
1.5
11.0
1.2
9.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
17.5 15.0
1.2
13.0
MODEL
WSH6009 WSH6012 WSH6018 WSH6024 WSH6030 WSH6036 WSH6042 WSH6048 WSH6060
WSH6072
DIMENSIONAL DATA
DISCHARGE DUCT FLANGE
RETURN DUCT FLANGE
MOUNTING BRACKETS CENTER DISTANCES
K
L
M
N
O
P
Q
R
S
T
U
10.1 3.9 9.0 5.6 20.0 16.2 2.0 41.0 24.2 19.9 –
10.1 3.9 9.0 5.6 20.0 16.2 2.0 41.0 24.2 19.9 –
4.6 11.4 9.7 4.8 25.0 16.2 2.0 48.0 24.2 19.9 –
6.9 11.5 10.7 5.7 30.0 20.3 2.0 60.0 27.2 22.9 –
6.9 11.5 10.7 5.7 30.0 20.3 2.0 60.0 27.2 22.9 –
6.9 11.5 10.7 5.7 30.0 20.3 2.0 60.0 27.2 22.9 –
7.4 11.5 10.7 5.7 40 20.3 2.0 74.0 27.2 22.9 27.5
7.4 11.5 13.1 4.6 40 20.3 2.0 74.0 27.2 22.9 27.5
6.0 12.5 13.3 4.5 40 20.3 2.0 74.0 27.2 22.9 27.5
6.0 12.5 13.3 4.5 50 20.3 2.0 84.0 27.2 22.9 27.5 Table 2 Unit Dimensional Data Continued
CONDENSATE 3/4″ FTP
AA BB 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1 3.4 1.1
3.4 1.1
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UNIT PHYSICAL DATA
WSH6 MODELS UNIT INFORMATION Compressor Type (Qty) Factory Charge (R410A) (oz)
Fan Motor Type (Qty) Fan Motor HP Blower Wheel Size (D x W) (in) Water
Connection FPT (in) COAX Volume (US Gallons) Condensate Connection FPT (in)
Air Coil Dimension (H x W) in. Filter Size (H x W) in. Filter (Qty) Operating
Weight (lbs) Shipping Weight (lbs)
*3/4HP for 460V Models
PHYSICAL DATA 009 012 018 024 030 036 042 048 060 072
Rotary (1)
Scroll (1)
22.2 32.5 42.5 50.9 54.1 62.1 86.1 80.9 100.3 138.9
ECM (1) ECM (1) ECM (1) ECM (1) ECM (1) ECM (1) ECM (1) ECM (1) ECM (1) ECM (1)
1/4
1/4
1/3 1/2 1/2 1/2* 3/4
3/4
1
1
6.75 x 7 6.75 x 7 9 x 7 9 x 8 10 x 8 10 x 8 10 x 8 10 x 10 11 x 10 11 x 10
3/4
3/4
3/4
3/4
3/4
3/4
1
1
1
1
0.12 0.14 0.24 0.36 0.43 0.53 0.62 0.88 0.88 1.08
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
3/4
16 x 15.5 16 x 15.5 16 x 22 20 x 25 20 x 25 20 x 25 20 x 35 20 x 35 20 x 35 20 x 45
16 x 20 16 x 20 16 x 25 20 x 30 20 x 30 20 x 30 20 x 20 20 x 20 20 x 20 20 x 25
1
1
1
1
1
1
2
2
2
2
137 142 189 245 254 271 335 356 365 404
159 164 214 289 289 306 378 399 408 450 Table 3 Physical Data
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ELECTRICAL DATA
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MODEL WSH6009 WSH6012 WSH6018 WSH6024
WSH6030
WSH6036
WSH6042
WSH6048
WSH6060 WSH6072
ELECTRICAL DATA
VOLTAGE-PH-HZ COMPRESSOR
BLOWER MOTOR
RLA LRA FLA HP
208/230-1-60 3.7 22 2.3 1/4
265-1-60
3.5 22 2.3 1/4
208/230-1-60 4.7 26 2.3 1/4
265-1-60
3.8 23 2.3 1/4
208/230-1-60 7 38 2.8 1/3
265-1-60
6 30 2.6 1/3
208/230-1-60 16.8 55 4.6 1/2
265-1-60
9.6 54 3.6 1/2
208/230-3-60 7.7 55.4 4.6 1/2
460-3-60
3.6 28 3.2 3/4
208/230-1-60 12.8 67.8 4.6 1/2
265-1-60 10.9 60 3.6 1/2
208/230-3-60 8.3 58 4.6 1/2
460-3-60
4 38 3.2 3/4
208/230-1-60 15.4 83.9 4.6 1/2
265-1-60 13.5 72 3.6 1/2
208/230-3-60 10.4 73 4.6 1/2
460-3-60
5.8 38 3.2 3/4
208/230-1-60 19.2 123.9 6.3 3/4
265-1-60
16 87 4.9 3/4
208/230-3-60 13.5 88 6.3 3/4
460-3-60
6 44 3.2 3/4
208/230-1-60 19.6 130 6.3 3/4
265-1-60 16.3 98 4.9 3/4
208/230-3-60 13.7 83.1 6.3 3/4
460-3-60
6.2 41 3.2 3/4
208/230-1-60 24.4 144.2 7.6 1
265-1-60 19.9 130 6.6 1
208/230-3-60 16 110 7.6 1
460-3-60
7.8 52 4 1
208/230-1-60 30.8 178 7.6 1
208/230-3-60 19.6 136 7.6 1
460-3-60
8.2 66.1 4 1
Table 4 Electrical Data
MIN.
MAX.
CIRCUIT CIRCUIT
AMPACITY PROTECTION
7
15
7
15
9
15
8
15
12
15
11
15
26
40
16
25
15
20
8
15
21
30
18
25
15
20
9
15
24
35
21
30
18
25
11
15
31
45
25
40
24
35
11
15
31
50
26
40
24
35
11
15
39
60
32
50
28
40
14
20
47
70
33
50
15
20
WSH6 HORIZONTAL SERIES IOM
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INSTALLATION
REQUIREMENTS
Follow manufacturer’s installation instructions, as well as local and
municipal building codes.
INSTALLATION PRECAUTIONS
Always wear all appropriate personal protection Equipment when installing and servicing these units.
Use multiple people when moving and installing these units. Failure to do so could result in injury or death.
Contact with metal edges and corners can result injury. Protective gloves
should be worn when handling. Exercise caution when installing and servicing
unit.
Observe the following precautions for typical installation: Always use proper
tools and equipment. No wiring or any work should be attempted without
first ensuring the unit is completely disconnected from the power source and
locked out. Also, verify that a proper permanent and uninterrupted, ground
connection exists prior to energizing power to the unit. Review unit nameplate
and wiring diagram for proper voltage and control configurations. This
information may vary from unit to unit.
When the unit is in operation components are rotating at high speeds and caution should be taken.
When soldering and brazing, it is recommended to have a fire extinguisher readily available. When soldering and brazing close to valves or sensitive components, heat shields or wet rags are required to prevent damage to the valves or components.
Insulation is installed in the unit to provide a barrier between varying atmospheres outside and within the unit. If insulation is damaged condensation can occur and can lead to corrosion, component failure, and possible property damage. Damaged insulation must be repaired prior to the operation of the unit. Insulation will lose its effectiveness and value when wet, torn, separated, and/or damaged.
When servicing this equipment, because of high pressures, make sure the
reversing valve, expansion device, filter drier and other components are
specifically designed for R-410A refrigerant.
ONLY USE service equipment specifically designated for use with R-410A.
R-410A can become combustible if mixed with air at elevated temperature and/or pressure. Failure to follow this warning could result in property damage and personal injury or death.
Do not operate this equipment without an air filter.
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INSTALLATION CONTINUED
UNIT CLEARANCE REQUIREMENTS
WSH6 HORIZONTAL SERIES – IOM
Left Return Back Discharge
Right Return Back Discharge
Left Return Straight Discharge
Right Return Straight Discharge
FIGURE 7 Unit Clearance Requirements
WSH6 HORIZONTAL SERIES IOM
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WSH6 HORIZONTAL SERIES – IOM
INSTALLATION CONTINUED
UNIT CLEARANCE REQUIREMENTS/MOUNTING DETAILS
Notes:
1. While clear access to all removable panels is not required, installer
should take
care to comply with all building codes and allow adequate clearance for future
field service. 2. CCP and BSP requires 2′ service access. 3. Blower service
access is through back panel on straight discharge units or through
panel opposite air coil on back discharge units. 4. ASP are removable panels
that provide additional access to the units’ interior.
Clear access to ASP panels is not required and they are not to be used in
place of
the mandatory CCP and BSP panels.
Legend:
CCP = Control/Compressor Access
Panel
BSP = Blower Service Panel ASP Additional Service Panel (not required)
MOUNTING DETAILS
Locate the unit in an area that provides minimum clearance accesses as
specified by FIGURE 7 Unit Clearance Requirements. Also, refer to this
figure for detailed information on unit dimensional sizes. Consider all
additional clearances needed for water connections, electrical connections,
duct connections and sufficient return airflow.
UNITS ARE ONLY INTENDED FOR INDOOR INSTALLATION
DO NOT locate unit in areas subject to freezing temperatures or where high
humidity levels could cause cabinet condensation. WSH6 units are available in
right- and left-hand configurations. Units should be mounted level with a
proper drain pan pitch toward the condensate drain as seen in FIGURE 8
Horizontal Unit Pitch & Filter Rail Detail. Filter rails are factory
installed, remove converter bar for 2″ filter installation.
It is important to ensure the unit is securely mounted and that the mounting structure is sufficient to support the operating weight of the equipment. Place and size all anchors to ensure a safe and durable installation.
FIGURE 8 Horizontal Unit Pitch & Filter Rail Detail
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INSTALLATION CONTINUED
MOUNTING DETAILS CONTINUED
WSH6 HORIZONTAL SERIES – IOM
FIGURE 9 Mounting Installation
WSH6 HORIZONTAL SERIES IOM
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WSH6 HORIZONTAL SERIES – IOM
INSTALLATION CONTINUED
MOUNTING DETAILS CONTINUED
WSH6 units are typically installed above a false ceiling or in a ceiling
plenum. Each unit is suspended from the ceiling by 4 or 5 thread rods. The
rods are attached to the unit corners by a hanger bracket through a rubber
isolator. Refer to FIGURE 8 Horizontal Unit Pitch & Filter Rail Detail, &
FIGURE 9 Mounting Installation.
WSH6 units have 4 or 5 hanger brackets attached at the factory, one at each
corner. The hanger vibration kit is located at the blower opening area. The
kit contains vibration isolation grommets, washers, and screws. Insert the
all-thread hanging rod through the bracket, vibration isolation grommet,
washers and double nuts at the end of the rod as shown in FIGURE 9 Mounting
Installation. There should be a total of 4 or 5 rods. Ensure that the unit is
approximately level and that the threaded rod extends past the nut. Pitch the
unit toward the drain as shown in as shown in to FIGURE 8 Horizontal Unit
Pitch & Filter Rail Detail to improve the condensate drainage.
A horizontal unit should be positioned to allow for removal of the filters and
access panels. Units should be located directly below a structural member, so
that it is securely anchored. The filter needs to be slid out and sufficient
space must be provided to allow this. Do not install the unit above any piping
or electrical raceways. Avoid installing units directly above occupied spaces.
This will minimize possible disruption to the occupants if maintenance or
service is required as well as keeping a potential source of noise out of the
area.
BLOWER FIELD CONVERSION
FIGURE 10 Field Blower Conversion
18
WSH6 HORIZONTAL SERIES IOM
INSTALLATION CONTINUED
BLOWER FIELD CONVERSION
WSH6 units can be field converted between side (straight) and end discharge.
Due to the necessary of refrigeration copper piping changes, it is not
possible to field convert left return air to right return air models or vice
versa.
Field conversion is best done on the ground before hanging.
1. Remove four screws and the Panel Plate. 2. Remove four screws holding the
Blower Panel. 3. Rotate the Blower Panel 180° and slide in where
Panel Plate used to be. Screw in to secure the Blower Panel. 4. Place in the
Panel Plate at the side and secure it with the remaining screws. FIGURE 10
Field Blower Conversion shows straight to end discharge conversion. For end to
straight discharge conversion, reverse the order of the pictures.
PIPING NOTES
Prior to making piping connections, contractor must clean and flush water loop
system. Failure to clean/flush system may result in excessive noise, tripping,
and premature component failure.
1. Flush all field piping prior to connection to clear all debris.
2. Open all valves (mid-way for hand valves, manually open motorized valves)
prior to soldering and brazing. Use proper heat shields to protect valve
bodies.
3. When soldering or brazing to the unit, it is recommended to have a fire
extinguisher readily available.
4. Use proper soldering and brazing techniques to protect valve bodies and
unit components.
5. Avoid rapid quenching of soldered joints to prevent weakening.
WSH6 HORIZONTAL SERIES – IOM
6. Make provisions for expansion and contraction of piping systems to provide
movement with temperature changes. Failure to make proper provisions will
result in damage and failure of piping, fittings, and valves throughout the
system.
7. DO NOT insulate the heads or motorized portion of control valves.
Excessive heat build-up can cause damage and affect proper operation of the
system.
8. Consider electrical routing when installing field piping. 9. Observe all
regulations and codes governing
installation of piping. 10. When all connections are complete, pressure test
the
system, and repair any leaks or faulty joints. Hydronic systems are not
designed to hold pressurized air and should only be tested with water. Failure
to observe this note could damage the system.
PIPING INSTALLATION
All piping must be adequately sized to meet the designed water flow as
specified for the specific application, and must adhere to all applicable
codes. Piping connections on the equipment are not necessarily indicative of
the proper supply and return line sizes.
On units with plastic drain pans, the drain connection must be made hand tight
only.
Chilled water piping must be properly insulated to prevent condensation and
potential property damage. It is also recommended that all piping be insulated
to prevent freezing in unconditioned spaces.
Do not bend or kink supply lines or hoses. For all supply lines or hoses of 1-1/2″ OD or greater, use proper sized fitting is recommended to prevent piping damage and potential restrictions in water flow.
For all applications, 50°F minimum entering water temperature and rated water flow is required to prevent freezing. Antifreeze solution is required for any application with entering water below 50°F. Frozen water coils are not covered under warranty.
WSH6 HORIZONTAL SERIES IOM
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INSTALLATION CONTINUED
PIPING INSTALLATION
All manual flow valves used in the system must be ball valves. Globe and gate valves must not be used due to high pressure drop and poor throttling characteristics. Never exceed the recommended water flow rates. Serious erosion or damage of the water to refrigerant heat exchanger could occur.
When anti-freeze is used in the loop, insure that it is compatible with the
Teflon tape that is applied.
The WSH6 water source heat pump are designed to operate with the entering
liquid temperature between 50°F and 110°F. With the extended range option, the
heat pump model can operate with entering liquid temperatures between
50-110°F. Below 50°F. antifreeze solution must be used to prevent freezing.
Frozen water coils are not covered under warranty.
Do not allow hoses to rest against structural building components. Compressor
vibration may be transmitted through the hoses to the structure, causing
unnecessary noise complaints.
Always check carefully for water leaks and repair appropriately. Units are
equipped with female pipe thread fittings. Consult the specification sheets
for sizes. Teflon tape should be used when connecting water piping connections
to the units to insure against leaks and possible heat exchanger fouling.
Do not over tighten the pipe connections. Flexible hoses should be used
between the unit and rigid piping to avoid vibration transmission into the
structure.
Ball valves should be installed in the supply and return lines for unit
isolation and unit water flow balancing. Pressure / temperature ports are
recommended in both the supply and return lines for system flow balancing.
Water flow can be accurately set by measuring the water side pressure drop of
the water to refrigerant heat exchanger.
Water piping exposed to extreme low ambient temperatures is subject to freezing and possible rupture. Proper prevention should be taken to prevent pipe freezing or equipment damage or failure may occur. Failure to follow this warning could result in property damage.
Ground loop applications require extended range equipment and optional refrigerant/water circuit insulation.
Geothermal closed loop system operation of a WSH6 water source heat pump unit
on a closed loop application requires the extended range option.
ANTIFREEZE
Anti-freeze solutions must be utilized when low loop temperatures are expected
to occur. In areas where entering loop temperatures drop below 50°F or where
piping will be routed through areas subject to freezing, antifreeze is needed.
Alcohols and glycols are commonly used as antifreeze agents. Freeze protection
should be maintained to 15°F below the lowest expected entering loop
temperature. For example, if the lowest expected entering loop temperature if
30°F, the leaving loop temperature would be 22°F to 25°F. Therefore, the
freeze protection should be at 15°F (30°F-15°F=15°F).
LOW WATER TEMPERATURE CUTOUT SELECTION
The Digital Control Module allows the field selection of low water (or water-
antifreeze solution) temperature limit by clipping jumper JW1 and JW2, which
changes the sensing temperature associated with thermistor CO1 and CO2
respectively. Note that the CO1 thermistor is located on the refrigerant line
between the coaxial heat exchanger and expansion device (TXV). Therefore, CO1
is sensing refrigerant temperature, not water temperature, which is a better
indication of how water rate/temperature is
20
WSH6 HORIZONTAL SERIES IOM
INSTALLATION CONTINUED
LOW WATER TEMPERATURE CUTOUT SELECTION CONTINUED
affecting the refrigeration circuit. The factory setting for CO1 is for
systems using water (30°F [-1.1°C] refrigerant temperature). In low water
temperature (extended range) applications with antifreeze (most ground loops),
jumper JW1 should be clipped to change the setting to10°F [-12.2°C]
refrigerant temperature, a more suitable temperature when using an antifreeze
solution. All units operating with entering water temperatures below 50°F
[10°C] must include the optional water/refrigerant circuit insulation package
to prevent internal condensation.
Disconnect power BEFORE the jumper wires are clipped. Failure to do so could result in equipment and/or property damage.
For all applications, 50°F minimum entering water temperature and sufficient
water flow is required to prevent freezing. Antifreeze solution is required
for any application with an entering water temperature below 50°F or, if
either JW1 or JW2 cut-out limits are set to 10°F (clipped). Failure to follow
this waring could result in heat exchanger, equipment, or property damage.
CONDENSATE DRAINAGE
Condensate drain lines must be properly installed with adequate slope away
from unit to ensure proper drainage. A minimum trap of 1.5 inches must be
installed to isolate the negative pressures of the drain pan from the drain
line. Refer to Figure 11 Condensate Drainage for schematic information on
the condensate drain lines.
Check the condensate overflow sensor for proper operation and adjust if necessary. Final field adjustments ensures proper operation to avoid property damage.
On units with plastic drain pans, the drain connection must be made hand tight only.
WSH6 HORIZONTAL SERIES – IOM
Both the supply and return water lines will sweat if subjected to low water temperature. These lines should be insulated to prevent water damage to the property.
Units equipped with the economizer option must have a separate externally
trapped drain line for condensate removal.
Insulation is not required on loop water piping except where the piping runs
through unconditioned areas, outside the building or when the loop water
temperature is below the minimum expected dew point of the pipe ambient
conditions. Insulation is required if loop water temperature drops below the
dew point. Units are supplied with either a copper or optional cupronickel
water to refrigerant heat exchangers. Copper is adequate for ground water that
is not high in mineral content. Should your well driller express concern
regarding the quality of the water or should any known hazards exist in your
area then we recommend proper testing to assure the well water quality is
suitable for use with water source equipment. In conditions anticipating
moderate scale formation or in brackish water a cupro-nickel heat exchanger is
recommended.
FIGURE 11 Condensate Drainage
WSH6 HORIZONTAL SERIES IOM
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ELECTRICAL HIGH VOLTAGE
Disconnect all power supplies before servicing. Lock out/tag out to prevent accidental electrical shock. NOTE: There may be multiple power sources supplying the unit.
Use copper conductors only. Install all parts and panels before operation of
unit. Failure to follow these warnings can result in injury or death.
All wiring must comply with local and national code requirements. Units are
provided with wiring diagrams and nameplate data to provide information
required for necessary field wiring.
The WSH6 water source heat pumps are provided with a class 2 transformer for
24VAC control circuits. Should any add-on accessory or component also have a
class 2 transformer furnished, care must be taken to prevent interconnecting
outputs of the two transformers by using a thermostat with isolating contacts.
Connect ground wire to ground terminal marked “GND”. Failure to do so can result in injury or death.
Any device that has been furnished by the factory for field installation must be wired in strict accordance with the associated wiring diagram. Failure to do so could damage components and void warranties.
208-230 VOLT OPERATION
All 208-230 Volt units are factory wired for 230 Volt
operation.
For
208
Volt
operation,
moving/changing/rewiring the line voltage tap on the 24
Volt control transformer is required. See note 3 on the
wiring diagram for instruction.
LOW VOLTAGE
THERMOSTAT A standard 24 VAC Heat Pump thermostat is required that will
operate the reversing valve in the cooling mode. Thermostat connections and
their functions are below in FIGURE 12 Thermostat Connections as follows:
C Transformer 24VAC Common O Reversing Valve (energized in cooling) Y
Compressor Contactor R Transformer 24VAC Hot G Evaporator Blower
FIGURE 12 Thermostat Connections
THERMOSTAT INSTALLATION
The Thermostat should be located on an interior wall in a larger room, away
from supply duct draft. Position the thermostat back plate against the wall so
that it appears level and so the thermostat wires protrude through the middle
of the back plate mounting holes and drill holes with a 3/16″ (5mm) bit.
Install supplied anchors and secure plate to the wall. Thermostat wire must be
18 AWC wire.
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WSH6 HORIZONTAL SERIES IOM
APPLICATION
COOLING TOWER/BOILER APPLICATION
To ensure optimum cooling and heating performance, the cooling tower and
boiler loop temperature should be maintained between 55-75°F in the heating
mode and 6095°F in the cooling mode. In the cooling mode, heat is rejected
from the heat pump’s refrigerant into the water loop. A cooling tower and/or
boiler may be required to maintain proper water temperature within the water
loop. In an open cooling tower, chemical water treatment is mandatory to
ensure water is free of corrosive materials
In heating mode, heat is absorbed from the water loop into the heat pump’s
refrigerant. A boiler may be utilized to maintain the proper water temperature
within the loop.
A boiler may be required in the water loop to maintain the loop water
temperature between 55-75°F. Failure to maintain proper water loop
temperatures could result in equipment failure and property damage, and void
warranties.
A secondary heat exchanger (plate frame between the unit and the open cooling
tower) may also be used. It is imperative that all air is eliminated from the
closed loop side of the heat exchanger to prevent condenser fouling.
Use copper conductors only. Install all parts and panels before operation of unit. Failure to follow these warnings can result in injury or death.
The manufacturer does NOT WARRANT equipment subjected to abuse. Dirt, piping
chips or other foreign material can cause damage or failure to the water or to
refrigerant heat exchanger.
No unit should be connected to the supply or return piping until the water
system has been completely cleaned and flushed to remove dirt, piping chips or
other foreign material. Supply and return hoses should be connected together
during this process to ensure the entire system is properly flushed. After the
cleaning and flushing has taken place the unit may be connected to the water
loop and should have all valves adjusted to supply the proper flow
WSH6 HORIZONTAL SERIES – IOM
rate for the unit. Nominal flow rate is 3 GPM per 12,000 BTUH of cooling.
EXTENDED RANGE OPERATION Piping systems expected to utilize water temperature
below 50°F require the extended range option, which includes closed cell
installation on all piping surfaces to eliminate condensation. This
application requires sufficient antifreeze solution to prevent the water loop
against extreme temperature conditions and condenser coil freezing. Frozen
condenser coil are not covered under warranty. A boiler may be required to
maintain the minimum water temperature within the loop.
Connect ground wire to ground terminal marked “GND”. Failure to do so can result in injury or death.
Any device that has been furnished by the factory for field installation must
be wired in strict accordance with the associated wiring diagram. Failure to
do so could damage components and void warranties.
CLOSED LOOPS
Failure to maintain proper water loop temperatures could result in equipment
failure and property damage, and void warranties. Consult the factory when
running entering water temperatures below 50°F as additional pipe insulation
may be required to avoid excessive sweating inside the unit. For applications
below 50°F it is imperative that the system be operated with antifreeze
solution. When a secondary heat exchanger is used (i.e. plate to plate; closed
loop system) it is imperative that all air is purged from the system to
prevent condenser fouling.
The entire water loop must be completely cleaned and flushed of all debris
prior to final connections and unit
operation.
Valves should be adjusted to supply proper water flow rated for the unit.
Failure to do so will VOID ALL FACTORY WARRANTY.
WSH6 HORIZONTAL SERIES IOM
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APPLICATION CONTINUED
WATER WELL APPLICATION
REQUIREMENTS: 50° Minimum Entering Water Temperature Cupronickel Refrigerant
Heat Exchanger
When a water well is used exclusively for supplying water to the heat pump, a
cupronickel refrigerant heat exchanger is required and the well pump should
operate only when the heat pump operate. A 24 Volt contactor can be wired to
the ACC1 terminal on the Control Module which can be selected to be energize
prior to or at compressor start-up, which would in turn energize the water
pump to operate with the heat pump.
Potential Failure Mode
Corrosion and Scaling
Iron Fouling Erosion
WELL WATER APPLICATION
Water Chemistry Parameter
Copper
pH Level Hardness (Calcium or Magnesium
Carbonate) Langelier Saturation Index (LSI)
Ryznar Stability Index (RSI) Hydrogen Sulfide Sulfates Chlorine Chlorides
Carbon Dioxide Ammonia
Ammonia Chloride, Nitrate, Hydroxide, Sulfate
Total Dissolved Solids (TDS) Iron, Iron Bacteria Iron Oxide
Suspend Solids
7-9
< 350 ppm
-0.5 to 0 6.2 6.8 < 0.5 ppm < 125 ppm < 0.5 ppm < 20 ppm < 5 ppm < 2 ppm
< 0.5 ppm
< 1000 ppm < 0.2 ppm < 1 ppm < 10 ppm, < 600 Micron or 30 mesh filter size
Design Water Velocity
3 GPM/TON
Table 5 Well Water Application Data
CuNi
7-9
<350 ppm
-0.5 to 0 6.2 6.8 < 0.5 ppm < 125 ppm < 0.5 ppm < 150 ppm < 5 ppm < 2 ppm
< 0.5 ppm
< 1500 ppm < 0.2 ppm < 1 ppm < 10 ppm, < 600 Micron or 30 mesh filter size
3 GPM/TON
Minimum entering water temperature is 50°F. Failure to follow this warning could result in equipment failure and property damage. The discharge water from the heat pump is not contaminated in any manner and can be disposed of in various way depending upon local codes.
Close loop and pond applications require specialized design knowledge. Do not attempt at these installations without the licensed installer the received specialized training.
24
WSH6 HORIZONTAL SERIES IOM
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APPLICATION CONTINUED
ANTIFREEZE CAPACITY AND PRESSURE CORRECTION FACTORS DATA
ANTIFREEZE
COOLING CAPACITY HEATING CAPACITY
PRESSURE DROP
10% 0.995 0.991 1.070
ETHYLENE GLYCOL
20%
30%
0.992
0.987
0.982
0.977
1.130
1.180
Table 6 – Antifreeze Correction Factors Ethylene Glycol
40% 0.983 0.969 1.260
50% 0.979 0.961 1.280
ANTIFREEZE
COOLING CAPACITY HEATING CAPACITY
PRESSURE DROP
10% 0.990 0.987 1.070
PROPYLENE GLYCOL
20%
30%
0.980
0.970
0.975
0.962
1.150
1.250
Table 7 – Antifreeze Correction Factors Propylene Glycol
40% 0.960 0.942 1.370
50% 0.950 0.930 1.420
ANTIFREEZE
COOLING CAPACITY HEATING CAPACITY
PRESSURE DROP
10% 0.980 0.950 1.023
METHANOL
20% 0.972 0.970 1.067
Table 8 – Antifreeze Correction Factors Methanol
ANTIFREEZE
COOLING CAPACITY HEATING CAPACITY
PRESSURE DROP
10% 0.991 0.995 1.035
ETHANOL
20% 0.951 0.960 0.960
Table 9 – Antifreeze Correction Factors Ethanol
WSH6 HORIZONTAL SERIES IOM
25
WSH6 HORIZONTAL SERIES – IOM
CONTROLS
SEQUENCE OF OPERATION
START
YES
Y = ON
NO
COOL MODE YES
ANTI-SHORT CYCLE
NO
G = ON
NO
YES FAN MODE
FAN = ON
STAND BY
FAULT RETRY BLINK
INITIAL CONDITION: Comp = Off; Fan = Off AWAY CHIP = NOT INSERT
LEGEND: Y = Call for Cooling G = Call for Fan HPS High Pressure Switch LPS
Low Pressure Switch CO1 Air-Coil Freeze Sensor CO2 = Water-Coil Freeze
Sensor CON Condensate Overflow Sensor
SYSTEM CHECK
NO
HPS = CLOSED NO
YES
FAULT RETRY
LPS = CLOSED
NO
YES
COMP STATUS ON NO
YES
COUNT
< 3
YES
SYSTEM LOCK
COMP OFF
ALARM RELAY & FAULT BLINK CDO
T1 > CO1
NO
YES
T2 > CO1
NO
YES
CON = OPEN
NO
YES
COMP STATUS ON YES
YES
DIP 1.1 TARG YES
NO
COMP ON
FIGURE 13 Sequence of Operations
NO
T > 5S
YES
26
WSH6 HORIZONTAL SERIES IOM
CONTROLS CONTINUED
WSCM CONTROL MODULE
CONTROL FEATURES Anti-short Cycle Protection Random Start High and low
Pressure Cut-out Water Coil Low Temperature Cut-out Over/Under Voltage
Protection Fault Retry Lockout with Soft and Hard Reset Condensate Overflow
Sensor Diagnostic LED Display Test Mode Alarm Relay Accessory Relays Vacated
Mode Extended Compressor Operating Monitoring
MOTOR SPEED OPERATION An ECM blower can be driven directly from the WSCM
control module. The control of the motor is based off the input signals of G,
Y1, and O. The blower speed is automatically controlled via the WSCM module.
MOTOR SPEED OPERATION
Unit Call
Fan Speed
G
G1
Y,G G2, then G3 after 5min of run time
Y,O,G G2, then G3 after 10min of run time Table 10 Motor Speed Operation ECM
A secondary heat exchanger (plate frame between the unit and the open cooling tower) may also be used. It is imperative that all air is eliminated from the closed loop side of the heat exchanger to prevent condenser fouling.
FIELD CONTROLLABLE FUNCTIONS
TEST MODE The unit can be placed into test mode by shorting the test pins on
the WSCM module. Once the pins are shorted, the WSCM module will enter a test
mode period in which all time delays are sped up 15 times. While in test mode
the yellow LED2 will light up yellow. Faults stored in memory can be cleared
by entering into test mode and exiting the test mode, or by a hard reset. Test
mode can be exited by shorting the test pins for approximately 3 seconds.
WSH6 HORIZONTAL SERIES – IOM
Test mode will be automatically exited after a 10 minute period.
During test mode, the control will monitor to see if CO1 and CO2 freeze
thermistors are present and correctly. The controls will indicate fault code
19 if CO1 or CO2 are open, or if there is a jumper connecting across the free
sensors terminals.
VACATED PREMISES CONTROL
Optional Vacated Premise Kit option must be installed to operate in this mode.
The vacated premises operation is designed for extended periods of un-
occupancy when the occupant wants the heat pump to operate in cooling mode for
a predetermined cycle time to help control indoor air conditions. See Dip 1.7
for time selection (1 or 2 hours).
Additionally, the mode will store all faults seen over 24 hours in memory. If
the same fault occurs for 4 consecutive days, the unit will go into a hard
lockout.
The control kit consist of a rocker switch, wiring and a programmed chip that
is installed on the WSCM module by a licensed contractor.
WSH6 HORIZONTAL SERIES IOM
27
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CONTROLS CONTINUED
FIELD CONTROLLABLE FUNCTIONS
HOME SELECTION If the switch is in the HOME position the heat pump will
operate in its normal mode.
AWAY SELECTION If the switch is in the AWAY position the heat pump and
thermostat are set to “COOL” mode the heat pump will operate in accordance to
the thermostat setting. Additionally, the heat pump will cycle on in cooling
mode for 15 minute run times either 4 or 8 times per day depending on the Dip
1.7 selection. Thermostat still has priority and will cycle the unit as
needed.
If the LED display is flashing “Ay” the thermostat is not set in cooling mode.
BOILERLESS CONTROL
The system can operate in boilerless mode by switching Dip
1.5. If CO1 goes below the setting of Dip 1.6 the compressor
will be de-energized and control goes into emergency heat mode staging on
“W1”. The compressor will be locked out for 60 minutes to prevent nuisance
cycling.
The set point for boiler less changeover temperature can be adjusted by switching Dip 1.6.
WATER-COIL LOW TEMPERATURE CUT-OUT LIMIT Jumpers JW1-CO1 provide field selection of the temperature limit settings for CO1.
Not Clipped = 30°F
Clipped = 10°F
For all applications below 50°F entering water temperature, anti-freeze solution is required. Failure to follow this warning could result in heat exchanger, equipment or property damage.
ALARM RELAY SETTING Jumper 3 (JW3 Alarm) provides field selection of alarm
relay terminal AL2 to be jumpered to 24VAC or to be dry. The alarm relay is
activated during lockout mode.
Not Clipped = AL2 Connected to “R”
Clipped = AL2 dry contacts (No connection)
DEHUMIDIFICATION MODE The system can operate in Dehumidification mode by
switching Dip 1.4 on the WSCM module. In this mode, the unit will run
continuously in fan speed G2 when Y,O, G calls are given to the board.
Dehumidification mode will not run in heating mode.
WSCM SAFETY FEATURES
ANTI-SHORT CYCLE PROTECTION The WSCM module incorporates a 5 minute anti-short
cycle protection for the compressor.
RANDOM START The WSCM module features a 5-80s random start upon receiving a
call to operate.
FAULT RETRY While in Fault Retry Mode the LED will display a code representing
retry and the fault code. The unit will initiate the Anti-short cycle timer
and try to restart after the delay. If 3 consecutive faults occur without
satisfying the thermostat the unit will go into hard lockout. The last fault
causing the lockout will be stored in memory and displayed on the two digit
LED display.
WATER-COIL LOW TEMPERATURE CUT-OUT (CO1) The control module will recognize a
CO1 fault during a compressor run cycle if:
a) Thermistor temperature is below the selected set point limit.
b) The thermistor temperature is rising at a rate less than 2°F per 30s time
period. The CO1 input is bypassed for the first 120s of a compressor run
cycle. On the second and third retry CO1 is bypassed for the initial 90s and
60s of run-time respectively.
AIR COIL LOW TEMPERATURE CUT-OUT (CO2) The control module will recognize a CO2
fault during a compressor run cycle if:
a) Thermistor temperature is below the selected set point limit.
b) The thermistor temperature is rising at a rate less than 2°F per 30s time
period. The CO2 input is bypassed for the first 120s of a compressor run
cycle.
28
WSH6 HORIZONTAL SERIES IOM
CONTROLS CONTINUED
WSCM SAFETY FEATURES
CONDENSATE OVERFLOW SENSOR The condensate overflow sensor must sense overflow
levels for 30 continuous second to initiate a COF fault. The condensate
overflow sensor will be monitored during the compressor run cycle.
LOW PRESSURE The low pressure switch must be open and remain open for 30
continuous seconds during the “on” cycle to be recognized as a low pressure
fault. The low pressure switch input is bypassed for the initial 120s of
compressor run-time.
HIGH PRESSURE If the high-pressure switch opens at any time, the compressor
relay is de-energized immediately.
LOCKOUT MODE While in Lockout Mode the LED Display will display a code
representing the lockout fault code. During this lockout the compressor relay
is not energized and the alarm relay is activated.
The lockout mode can be cleared by either going into test mode or a hard reset
via the power disconnect
Caution: Do not restart units in lockout mode without inspection and
correction of the fault condition. Failure to do so many result in equipment
damage.
EXTENDED COMPRESSOR OPERATION MONITORING If the compressor relay has been
energized for four continuous hours, control module will automatically turn
off the compressor relay and the compressor will enter antishort cycle delay
before restarting. During this off period, all appropriate safety will be
monitored and if the compressor demand is present, the control module will
energize the compressor relay.
OVER/UNDER VOLTAGE SHUTDOWN Should an Over/Under Voltage Condition be detected
the control module will shut down. Over/Under Voltage faults cause a soft
lockout and the unit will return to normal operation once normal voltage has
been restored. The nominal voltage run is 18.5VAC to 31VAC. If the WSCM module
is in Over/Under Voltage fault for 15 minutes, the alarm relay will activate.
WSH6 HORIZONTAL SERIES – IOM
FIGURE 14 Control Board Layout FIGURE 15 Sight Glass Location
WSH6 HORIZONTAL SERIES IOM
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CONTROLS CONTINUED
WSCM SAFETY FEATURES
CONTROL BOARD LAYOUT LEGEND
INPUT
CONNECTION OR
DESCRIPTION
OUTPUT
R
— 24 VAC
C
— 24 VAC (Grounded Common)
Y1
I Input Call for Compressor
W
I Input Call for Heating or Emergency Heat
O
I Input Call for Reversing Valve in Cooling
G
I Input Call for Fan Operation
AL1
O
Connect to Thermostat Fault Light 24VAC or Dry Contact Alarm
AL2 A ACC1 ACC2 G1 G2 G3
O Alarm Relay 24VAC or Dry Contact
O
Output for Water Solenoid Valve Paralleled with Compressor Contactor
O
ACC1 Output for Accessory Relay 1 24VAC between ACC1 and COM
O
ACC2 Output for Accessory Relay 2 24VAC between ACC2 and COM
O
Connection for Fan Relay Low Speed Operation
O
Connection for Fan Relay Medium Speed Operation
O
Connection for Fan Relay Large Speed Operation
CC
O Connection for Compressor Contactor
CCG
O
Compressor Contactor Common Connections
HP
I High Pressure Switch Input Terminals
LOC
I Low Pressure Switch Input Terminals
CO1
I
Water Coil Low Temperature Thermistor Output
CO2
I
Air Coil Low Temperature Thermistor Output
RV
O
Reversing Valve Output Terminals Direct Connect from “O”
COND_SW
I Condensate Overflow Input Terminal
W1
O Output Terminal for Electric Heat
COM
— Grounded Common
Table 11 Control Board Layout Legend
CONTROLLER OPERATION CODES
DESCRIPTION OF OPERATION
LED
READOUT
Normal Mode
ON
(Green Light)
Controller Non Functional
OFF
(Green Light)
Test Mode (pins shorted momentarily)
ON
(Yellow Light)
DESCRIPTION OF OPERATION
CODE
Standby
St
Fan Only(G active)
Fo
Cool (Y1 & O active)
Co
Heat 1st Stage (Y1 active)
H1
Accessory Relay 1
A1
Accessory Relay 2
A2
Vacated Premises Control
Ay
Fault Retry
rE & CODE #
Lockout
Lo & CODE #
Over/Under Voltage Shutdown
Ou & CODE #
Temperature Sensor Error
SE & CODE #
DESCRIPTION OF OPERATION
CODE
Test Mode No Fault
11
Test Mode HP Fault
12
Test Mode LP Fault
13
Test Mode CO1 Fault
14
Test Mode CO2 Fault
15
Test Mode Cond. Overflow Fault
16
Test Mode Over/Under Shutdown
17
Test Mode Swapped CO1/CO2 Thermistors
18
Table 12 Control Operating Codes
30
WSH6 HORIZONTAL SERIES IOM
CONTROLS CONTINUED
WSCM SAFETY FEATURES
WSCM DIP SWITCH FUNCTIONS
FUNCTION
OFF
ON
DIP SWITCH 1
1.1 Compressor Delay
No Delay 5s Delay
1.2 Motor Type
PSC Motor ECM Motor
1.3 Blower Time Delay
None
45s
1.4 Dehumidification
None
Dehum
1.5 Boilerless
Off
On
1.6 Boilerless Setpoint
40°F
50°F
1.7 Vacated Premises
1hr
2hr
DIP SWITCH 2
2.1 Accessory Relay Control
With Fan With Comp
2.2 Compressor Delay
None
60s
2.3 Accessory Relay 2 Control With Fan
With Comp
2.4 Fan Delay
None
30s
Table 13 WSCM DIP Switch Functions
CONTROL BOX DETAIL
WSH6 HORIZONTAL SERIES – IOM
ASSEMBLY
Once box is removed completely, line up the control panel back in place of the
unit and tighten screws on the base plate and on the front panel. Plug back
any harnesses previously removed.
REMOVAL
- Ensure that all electrical power is removed from the unit and that the local disconnect is locked out.
- Remove the screws on the front electrical panel with a ¼” hex head driver.
- Remove the electrical front panel and access the electrical box
- Disconnect electrical harnesses 5) Remove the two ¼” hex header screws
holding the
electrical box in place on the bottom and side. 6) Remove electrical box from unit.
Disconnect all power supplies before servicing. Lock out/tag out to prevent accidental electrical shock.
There may be multiple power sources supplying the unit.
FIGURE 16 Control Box Layout
WSH6 HORIZONTAL SERIES IOM
31
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA
BLOWER DATA
MODEL NUMBER WSH6009 WSH6012 WSH6018
WSH6024
WSH6030 WSH6036 WSH6042
WSH6048
WSH6060 WSH6072
BLOWER DATA
BLOWER DATA
FAN SPEED
RATED AIRFLOW
0.1
0.2
CFM VS. STATIC PRESSURE (in. w.g.) 0.3 0.4 0.5 0.6 0.7 0.8
0.9
1.0
WHITE
–
– 370 340 310 280 250 –
–
–
VIOLET 350 – T3 – 370 340 310 280 250 –
–
–
–
GRAY
375 350 320 290 260 –
–
–
–
–
WHITE
–
– 470 440 410 380 350 320 –
–
VIOLET 450 – T3 – 460 430 400 370 340 310 –
–
–
GRAY
440 410 380 350 320 –
–
–
–
–
T4
–
–
–
– 675 650 600 530 490 –
T3
–
–
– 675 630 590 540 480 –
–
T2
600 – T3 –
– 660 620 570 540 490 –
–
–
T1
675 650 610 560 510 480 –
–
–
–
T4
–
–
–
– 920 880 840 810 780 720
T3
–
–
– 900 860 820 790 760 720 –
T2
800 – T3 –
– 890 840 800 760 730 690 –
–
T1
– 880 830 770 740 710 680 –
–
–
T4
–
–
–
– 1,170 1,050 950 850 750 –
T3
–
– 1,160 1,130 1,090 1,000 900 800 –
–
T2
1025 – T3 1,130 1,090 1,060 1,030 990 940 850 –
–
–
T1
1,030 1,000 970 940 900 860 –
–
–
–
T3
– 1,380 1,350 1,310 1,200 1,090 1,000 900 –
–
T2 1050 – T3 1,330 1,280 1,240 1,200 1,140 1,030 930 –
–
–
T1
1,240 1,190 1,160 1,130 1,090 970 –
–
–
–
T4
–
–
–
– 1,570 1,530 1,500 1,470 1,440 1,350
T3 T2
1400 – T3
1,450
1,550 1,420
1,520 1,390
1,490 1,360
1,460 1,330
1,430 1,300
1,400 1,260
1,370 1,230
1,340 1,200
1,280 1,170
T1
1,380 1,350 1,320 1,290 1,260 1,230 1,200 1,170 –
–
T4
–
–
–
– 1,760 1,700 1,540 1,430 1,300 1,200
T3
– 1,750 1,720 1,690 1,660 1,610 1,500 1,400 1,300 –
T2
1500 – T3 1,700 1,640 1,600 1,570 1,540 1,510 1,450 1,370 –
–
T1
1,560 1,520 1,490 1,460 1,420 1,380 1,330 –
–
–
T4
–
–
–
– 2,240 2,210 2,150 2,080 2,000 1,900
T3
2,240 2,210 2,180 2,150 2,100 2,070 2,030 1,970 1,920 1,830
T2
1750 – T2 2,100 2,060 2,030 2,000 1,960 1,920 1,880 1,870 1,830 1,760
T1
1,940 1,910 1,880 1,840 1,790 1,750 1,710 1,680 –
–
T3
2,420 2,380 2,360 2,320 2,260 2,240 2,210 2,130 2,040 1,960
T2 2100 – T3 2,290 2,250 2,220 2,180 2,140 2,110 2,070 2,010 1,950 –
T1
2,160 2,120 2,090 2,040 2,010 1,970 1,940 –
–
–
Airflow data shown is with a wet coil at 80°F DB, 67°F WB EAT and with standard 1″ MERV 8 filter.
Table 14 WSH6 Blower Data
FACTORY BLOWER
SETTINGS
COOLING
1-10 10+ MIN MIN
X
HEATING X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
32
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 1.1 1.7 2.3 1.1 1.7 2.3 1.1 1.7 2.3 1.1 1.7 2.3 1.1 1.7 2.3 1.1 1.7 2.3
Suction Pressure
psig
WSH6009 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
128-138 137-147 126-136 132-142 130-140 130-140 135-145 134-144 134-144 142-152 140-150 139-149
Operation Not Recommended
61-71
62-72
63-73
214-224
22-28
21-25
83-93
193-203
22-28
13-17
90-100
183-193
22-28
10-14
93-103
284-294
21-27
20-24
118-128
260-270
21-27
13-17
120-130
249-259
21-27
9-13
144-154
367-377
19-25
19-23
159-169
342-352
20-26
12-16
175-185
330-340
20-26
9-13
184-194
468-478
18-24
18-22
442-452
18-24
12-16
430-440
19-25
8-12
Table 15 WSH6009 Pressure & Temperature Data
258-268 262-272 264-274 290-300 296-206 299-309 324-334 335-345 340-350 373-383 383-393 392-402
17-23 18-24 18-24 22-28 24-30 24-30 29-35 30-36 32-38 37-43 39-45 41-47
Operation Not Recommended
7-11 5-9 3-7 9-13 6-10 4-8 13-17 9-13 6-10 17-21 12-16 9-13
WSH6 HORIZONTAL SERIES IOM
33
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 1.5 2.3 3 1.5 2.3 3 1.5 2.3 3 1.5 2.3 3 1.5 2.3 3 1.5 2.3 3
Suction Pressure
psig
WSH6012 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
126-136 125-135 124-134 130-140 128-138 128-138 134-144 133-143 132-142 139-149 138-148 137-147
Operation Not Recommended
59-69
64-57
68-78
215-225
20-26
21-25
85-95
194-204
21-27
13-17
92-102
183-193
21-27
9-13
95-105
284-294
19-25
20-24
121-131
260-270
20-26
13-17
131-141
248-258
20-26
9-13
137-147
366-376
18-24
20-24
163-173
341-351
19-25
13-17
179-189
328-338
19-25
9-13
188-198
466-476
17-23
19-23
439-449
17-23
12-16
426-436
17-23
9-13
Table 16 WSH6012 Pressure & Temperature Data
263-273 268-278 270-280 296-306 303-313 306-316 334-344 345-355 358-368 383-393 401-411 412-422
16-22 17-23 18-24 22-28 23-29 24-30 29-35 31-37 32-38 37-43 40-46 42-48
Operation Not Recommended
7-11 4-8 3-7 9-13 6-10 4-8 13-17 8-12 6-10 16-20 11-15 8-12
34
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 2.3 3.4 4.5 2.3 3.4 4.5 2.3 3.4 4.5 2.3 3.4 4.5 2.3 3.4 4.5 2.3 3.4 4.5
Suction Pressure
psig
WSH6018 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
124-134 123-133 122-132 128-138 127-137 126-136 132-142 131-141 131-141 137-147 136-146 136-146
Operation Not Recommended
62-72
65-75
70-80
212-222
19-25
17-21
95-105
194-204
20-26
11-15
103-113
186-196
20-26
8-12
107-117
282-292
18-24
17-21
132-142
262-272
19-25
10-14
143-153
253-263
19-25
7-11
150-160
367-377
18-24
16-20
178-188
346-356
18-24
10-14
195-205
338-348
18-24
7-11
205-215
471-481
16-22
16-20
449-459
17-23
10-14
442-452
17-23
7-11
Table 17 WSH6018 Pressure & Temperature Data
276-286 282-292 283-293 334-344 344-354 360-360 383-393 399-409 408-418 444-454 466-476 479-489
16-22 17-23 18-24 24-30 26-32 27-33 31-37 33-39 35-41 39-45 42-48 43-49
Operation Not Recommended
7-11 5-9 3-7 9-13 6-10 4-8 12-16 8-12 6-10 16-20 10-14 8-12
WSH6 HORIZONTAL SERIES IOM
35
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 3 4.5 6 3 4.5 6 3 4.5 6 3 4.5 6 3 4.5 6 3 4.5 6
Suction Pressure
psig
WSH6024 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
126-136 125-135 113-123 130-140 129-139 129-139 135-145 134-144 133-143 140-150 139-149 139-149
Operation Not Recommended
56-66
61-71
66-76
202-212
20-26
16-20
93-103
187-197
20-26
10-14
98-108
180-190
20-26
8-12
102-112
271-281
19-25
16-20
130-140
255-265
19-25
10-14
140-150
247-257
19-25
7-11
145-155
357-367
18-24
15-19
176-186
340-350
18-24
10-14
191-201
331-341
18-24
7-11
199-209
461-471
17-23
15-19
443-453
17-23
9-13
434-444
17-23
7-11
Table 18 WSH6024 Pressure & Temperature Data
253-263 256-266 259-269 294-204 300-310 303-313 330-340 339-349 344-354 385-395 388-398 407-417
16-22 17-23 18-24 19-25 20-26 21-27 26-32 27-33 28-34 33-39 35-41 37-43
Operation Not Recommended
6-10 4-8 2-6 7-11 5-9 3-7 11-15 7-11 5-9 14-18 9-13 7-11
36
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 3.8 5.6 7.5 3.8 5.6 7.5 3.8 5.6 7.5 3.8 5.6 7.5 3.8 5.6 7.5 3.8 5.6 7.5
Suction Pressure
psig
WSH6030 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
118-128 116-126 116-126 123-133 121-131 120-130 128-138 126-136 126-136 134-144 133-143 132-142
Operation Not Recommended
53-73
67-77
71-81
218-228
24-30
20-24
93-103
198-208
25-31
13-17
100-110
188-198
25-31
9-13
104-114
289-299
23-29
20-24
130-140
265-275
23-29
13-17
140-150
254-264
23-29
9-13
147-157
375-385
22-28
19-23
173-183
349-359
22-28
12-16
189-199
337-347
22-28
9-13
199-209
478-488
20-26
18-22
452-462
20-26
12-16
439-449
21-27
8-12
Table 19 WSH6030 Pressure & Temperature Data
264-274 267-277 271-281 309-319 317-327 321-331 349-359 361-371 368-378 398-408 416-426 427-437
19-25 20-26 21-27 26-32 27-33 28-34 33-39 36-42 37-43 42-48 45-51 46-52
Operation Not Recommended
7-11 4-8 3-7 9-13 6-10 4-8 12-16 8-12 6-10 16-20 11-15 8-12
WSH6 HORIZONTAL SERIES IOM
37
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 4.5 6.8 9 4.5 6.8 9 4.5 6.8 9 4.5 6.8 9 4.5 6.8 9 4.5 6.8 9
Suction Pressure
psig
WSH6036 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
122-132 120-130 120-130 126-136 125-135 124-134 131-141 129-139 129-139 136-146 135-145 135-145
Operation Not Recommended
62-72
66-76
70-80
221-231
23-29
19-23
93-103
203-213
23-29
12-16
100-110
194-204
23-29
9-13
104-114
294-304
22-28
19-23
130-140
273-283
22-28
12-16
141-151
264-274
22-28
9-13
148-158
382-392
21-27
18-22
175-185
360-370
21-27
12-16
192-202
350-360
21-27
8-12
202-212
489-499
19-25
18-22
466-476
20-26
11-15
457-467
20-26
8-12
Table 20 WSH6036 Pressure & Temperature Data
265-275 269-279 275-285 311-321 319-329 323-333 353-363 365-375 373-383 403-413 421-431 432-442
19-25 20-26 21-27 25-31 26-32 27-33 32-38 34-40 36-42 41-47 43-49 45-61
Operation Not Recommended
7-11 4-8 2-6 9-13 6-10 4-8 13-17 8-12 6-10 16-20 11-15 8-12
38
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 5.3 7.9 10.5 5.3 7.9 10.5 5.3 7.9 10.5 5.3 7.9 10.5 5.3 7.9 10.5 5.3 7.9
10.5
Suction Pressure
psig
WSH6042 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
128-138 127-137 126-136 133-143 131-141 131-141 137-147 136-146 135-145 143-153 141-151 141-151
Operation Not Recommended
58-68
62-72
64-74
226-236
24-30
20-24
89-99
205-215
25-31
13-17
95-105
195-205
25-31
9-13
99-109
298-308
23-29
19-23
126-136
274-284
24-30
12-16
134-144
263-273
24-30
9-13
141-151
385-395
22-28
18-22
170-180
359-369
22-28
12-16
185-195
348-358
23-29
8-12
194-204
489-499
21-27
18-22
463-473
21-27
11-15
451-461
21-27
8-12
Table 21 WSH6042 Pressure & Temperature Data
262-272 266-276 271-281 293-303 299-309 302-312 328-338 336-346 343-353 372-382 387-397 395-405
19-25 20-26 21-27 24-30 25-31 26-32 31-37 33-39 34-40 39-45 42-48 43-50
Operation Not Recommended
5-9 3-7 2-6 8-12 5-9 3-7 11-15 8-12 5-9 15-19 10-14 7-11
WSH6 HORIZONTAL SERIES IOM
39
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 6 9 12 6 9 12 6 9 12 6 9 12 6 9 12 6 9 12
Suction Pressure
psig
WSH6048 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
122-132 120-130 120-130 127-137 125-135 124-134 132-142 130-140 129-139 138-148 136-146 135-145
Operation Not Recommended
65-75
69-79
73-83
222-232
24-30
20-24
104-114
201-211
25-31
13-17
111-121
191-201
25-31
9-13
115-125
293-303
23-29
20-24
144-154
269-279
23-29
13-17
155-165
257-267
24-30
9-13
161-171
380-390
22-28
19-23
193-203
354-364
22-28
12-16
209-219
341-351
22-28
9-13
217-227
485-495
21-27
18-22
457-467
21-27
12-16
444-454
21-27
8-12
Table 22 WSH6048 Pressure & Temperature Data
271-281 275-285 280-290 310-320 316-326 320-330 348-358 359-369 365-375 395-405 411-421 420-430
19-25 20-26 21-27 25-31 26-32 27-33 32-38 34-40 35-41 40-46 42-48 43-50
Operation Not Recommended
7-11 4-8 3-7 9-13 5-9 4-8 12-16 8-12 5-9 15-19 10-14 7-11
40
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 7.5 11.3 15 7.5 11.3 15 7.5 11.3 15 7.5 11.3 15 7.5 11.3 15 7.5 11.3 15
Suction Pressure
psig
WSH6060 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
125-135 123-133 123-133 129-139 128-138 127-137 134-144 133-143 132-142 140-150 139-149 138-148
Operation Not Recommended
58-68
62-72
64-74
220-230
25-31
19-23
91-101
201-211
25-31
12-16
98-108
191-201
25-31
9-13
101-111
290-300
24-30
18-22
128-138
268-278
24-30
12-16
138-148
257-267
24-30
8-12
144-154
377-387
23-29
18-22
172-182
352-362
23-29
11-15
187-197
340-350
23-29
8-12
196-206
480-490
21-27
17-21
455-465
21-27
11-15
443-453
22-28
8-12
Table 23 WSH6060 Pressure & Temperature Data
265-275 269-279 274-284 309-319 316-326 320-330 349-359 361-371 367-377 398-408 415-425 424-434
25-31 26-32 27-33 28-34 29-35 30-36 36-42 38-44 39-45 45-51 48-54 50-56
Operation Not Recommended
7-11 4-8 3-7 9-13 5-9 4-8 12-16 8-12 5-9 15-19 10-14 7-11
WSH6 HORIZONTAL SERIES IOM
41
WSH6 HORIZONTAL SERIES – IOM
PERFORMANCE DATA CONTINUED
PRESSURE & TEMPERATURE DATA
Entering Water Temp
°F 20
30
50
70
90
110
Water Flow Rate
GPM 9
13.5 18 9 13.5 18 9 13.5 18 9 13.5 18 9 13.5 18 9 13.5 18
Suction Pressure
psig
WSH6072 PRESSURE & TEMPERATURE DATA
COOLING
Discharge Air Temp
Water
Suction
Pressure
Drop
Temp Rise Pressure
psig
°F
°F
psig
HEATING
Discharge Air Temp
Pressure
Rise
psig
°F
Water Temp Drop
°F
Operation Not Recommended
122-132 121-131 120-130 126-136 125-135 125-135 132-142 130-140 130-140 137-147 136-146 135-145
Operation Not Recommended
56-66
59-69
64-74
219-229
25-31
18-22
85-95
202-212
26-32
12-16
91-101
193-203
26-32
8-12
95-105
288-298
24-30
18-22
119-129
268-278
24-30
11-15
129-139
259-269
25-31
8-12
135-145
373-383
23-29
17-21
160-170
351-361
23-29
11-15
175-185
341-351
23-29
8-12
184-194
474-484
21-27
17-21
451-461
22-28
11-15
441-451
22-28
8-12
Table 24 WSH6072 Pressure & Temperature Data
275-285 281-291 283-293 309-319 316-326 320-330 351-361 363-373 370-380 403-413 422-432 433-443
20-26 22-28 23-29 28-34 29-35 30-36 36-42 38-44 40-46 46-52 49-55 51-57
Operation Not Recommended
5-9 3-7 2-6 8-12 5-9 3-7 11-15 7-11 5-9 14-18 10-14 7-11
42
WSH6 HORIZONTAL SERIES IOM
PERFORMANCE DATA CONTINUED
WATER PRESSURE DROP DATA
WSH6 HORIZONTAL SERIES – IOM
WATERSIDE PRESSURE DROP
Flow Rate (GPM)
1.1
1.7
2.3
WSH6009
Pressure Drop (PSI)
0.2
0.7
1.2
Flow Rate (GPM)
1.5
2.5
3.0
WSH6012
Pressure Drop (PSI)
0.5
1.5
2.0
Flow Rate (GPM)
2.3
3.4
4.5
WSH6018
Pressure Drop (PSI)
0.5
1.4
2.4
Flow Rate (GPM)
3.0
4.5
6.0
WSH6024
Pressure Drop (PSI)
0.3
1.1
2.0
Flow Rate (GPM)
3.8
5.6
7.5
WSH6030
Pressure Drop (PSI)
1.0
2.1
3.5
Flow Rate (GPM)
4.5
6.8
9.0
WSH6036
Pressure Drop (PSI)
0.3
1.3
2.4
Flow Rate (GPM)
5.3
WSH6042
Pressure Drop (PSI)
0.3
7.9
10.5
1.6
2.8
Flow Rate (GPM)
6.0
WSH6048
Pressure Drop (PSI)
1.1
9.0
12.0
2.2
3.5
Flow Rate (GPM)
7.5
WSH6060
Pressure Drop (PSI)
1.4
11.3
15.0
3.2
5.3
WSH6072
Flow Rate (GPM)
9.0
13.5
Pressure Drop (PSI)
1.6
3.0
Table 25 Pressure Drop Data
Note: All values based upon pure water at 70°F
18.0 5.1
WSH6 HORIZONTAL SERIES IOM
43
WSH6 HORIZONTAL SERIES IOM
WSH6009-12 WIRING DIAGRAM (208-230V/1Ph/60Hz)
FIGURE 17 WSH6009-12 (208-230V/1Ph/60Hz)* Wiring Diagram
WSH6 HORIZONTAL SERIES – IOM
WIRING DIAGRAMS
4 4
WIRING DIAGRAMS
WSH6 HORIZONTAL SERIES IOM
WSH6009-12 WIRING DIAGRAM (265V/1Ph/60Hz)
FIGURE 18 WSH6009-12 (265V/1Ph/60Hz) Wiring Diagram
WSH6 HORIZONTAL SERIES – IOM
45
WSH6 HORIZONTAL SERIES IOM
WSH6018-72 WIRING DIAGRAM (208-230V/1Ph/60Hz)
FIGURE 19 WSH6018-72 (208-230V/1Ph/60Hz) Wiring Diagram
WSH6 HORIZONTAL SERIES – IOM
WIRING DIAGRAMS
4 6
WIRING DIAGRAMS
WSH6 HORIZONTAL SERIES IOM
WSH6018-72 WIRING DIAGRAM (265V/1Ph/60Hz)
FIGURE 20 WSH6018-72 (265V/1Ph/60Hz) Wiring Diagram
WSH6 HORIZONTAL SERIES – IOM
47
WSH6 HORIZONTAL SERIES IOM
WSH6024-72 WIRING DIAGRAM (208-230-460V/3Ph/60Hz)
FIGURE 21 WSH6024-72 (208-230-460V/3Ph/60Hz) Wiring Diagram
WSH6 HORIZONTAL SERIES – IOM
WIRING DIAGRAMS
4 8
CIRCUIT SCHEMATIC
WSH6 HORIZONTAL SERIES – IOM
FIGURE 22 – Circuit Schematic
STARTUP INSTRUCTIONS
PRE-STARTUP CHECKS:
Electrically ground the unit. Connect ground wire to ground lug. Failure to do so can result in injury or death.
Wire any field installed device such as a fan switch or thermostat furnished
by the factory in strict accordance with the wiring diagram supplied with the
unit. Failure to do so could result in damage to components and will void all
warranties.
Before start-up, thoroughly check all the components. Optimal operation of
equipment requires cleanliness. Often after installation of the equipment,
additional construction
activities occur. Protect the equipment from debris during these construction
phases.
PRIOR TO THE STARTUP OF THE UNIT:
1. Ensure supply voltage matches nameplate data. 2. Ensure the unit is
properly grounded 3. With the power off, check blower wheel set screws
for proper tightness and that the blower wheel rotates freely. 4. Ensure unit
will be accessible for servicing. 5. Ensure condensate line is properly sized,
run, trapped, pitched and tested. 6. Ensure all cabinet openings and wiring
connections have been sealed. 7. Ensure clean filters are in place. 8. Ensure
all access panels are in place and secured.
WSH6 HORIZONTAL SERIES IOM
49
WSH6 HORIZONTAL SERIES – IOM
STARTUP INSTRUCTIONS CONTINUED
PRIOR TO THE STARTUP OF THE UNIT:
9. Check that the water coil and piping has been leak checked and insulated
as required.
10. Ensure that all air has been vented from the water coil.
11. Make sure that all electrical connections are tight and secure.
12. Check the electrical overcurrent protection and wiring for the correct
size.
13. Verify that the low voltage wiring between the thermostat and the unit
matches the wiring diagram.
14. Verify that the water piping is complete and correct. 15. Check
condensate overflow sensor for proper
operation and adjust position if required. Ensure that power is connected to
the unit and the local disconnect is switched to ON position. 16. Check to
make sure that the refrigerant piping is free from any kinks and there is no
interference between unit piping and sheet metal, electrical wires or other
piping. 17. Before the unit is connected to the supply water, the water
circulating system must be cleaned and flushed to remove any dirt or debris
for the system. Refer to Maintenance & Service Cleaning/Flushing 18. Prior
to starting the unit, it is necessary to fully loosen the compressor bolts,
and re-tighten them finger tight. 19. Verify that all water control valves are
open and allow water flow prior to engaging the compressor. Freezing of the
coax or water lines can permanently damage the heat pump.
rotation could be done by switching any two of compressor wires. 6. Turn the
thermostat system to “OFF” position. The unit should stop running and the
reversing valve deenergizes. 7. Leave the unit off for approximately 5 minutes
to allow the system pressures to equalize. Anti-short cycle feature built in
the system will keep the compressor off for 5 minutes. 8. Set the thermostat
to the highest setting. Turn the system switch to “HEAT” position. 9. Verify
that the unit is operating to the heating mode. 10. Set the thermostat to
maintain the desired space temperature. 11. Check for vibrations, leaks, etc.
12. Verify water flow rate is correct according to specification. Adjust if
necessary. If specification is not available, the nominal flow rate for this
unit is 3 GPM per Ton. 13. Instruct the owner on the unit and thermostat
operation.
STARTUP & PERFORMANCE
CHECKLIST INSTRUCTIONS
The warranty may be void unless the FIGURE 23 Startup & Performance
Checklist. is completed and returned to the warrantor. If the WSH6 unit is not
installed properly, the warranty will be void, as the manufacturer cannot be
held accountable for problems that stem from improper installation.
UNIT STARTUP:
1. Turn the disconnect switch to ON position. 2. Check for 24 volts from
control transformer.
Controller module LED should light up. If not, the power supply lines are out
of phase. Turn the main power disconnect to the unit off and change the phase
by switching any two incoming wires. 3. Set the thermostat to the lowest
position. Turn the system switch to “COOL” and the fan switch to “AUTO”
position. The reversing valve should energize. 4. After 5 minutes (anti-short
cycle protect delay), the fan starts at low speed and the compressor is
running. 5. Make sure that compressor rotation is correct. If not, turn the
power off and make the correction. This is a 3-phase unit. Switching
compressor
50
WSH6 HORIZONTAL SERIES IOM
MAINTENANCE & SERVICE
PREVENTIVE MAINTENANCE
To achieve maximum performance and service life of equipment, a formal
schedule of regular maintenance should be established and adhered to.
All appropriate personal protection equipment should be worn when servicing or
maintaining this unit. Personal injury can result from sharp metal edges,
moving parts, and hot or cold surfaces.
FAN
The fan should be inspected and cleaned annually in conjunction with
maintenance of the motor and bearings. It is important to keep the fan section
and motor clean and free from obstruction to prevent imbalance, vibration, and
improper operation.
Check motor connections to ensure they are secure and in accordance with the
unit wiring diagram. ECM motors have line voltage power applied at all times.
MAKE SURE POWER IS DISCONNECTED BEFORE SERVICING.
FILTER
The air filter should be cleaned or replaced every 30 days or more frequently
if severe operating conditions exist. Always replace the filter with the same
type and size as originally furnished.
COIL
Clean all heat transfer surfaces and remove all dirt, dust, and contaminates
that potentially impairs air flow using industry accepted practices. Care
should be taken not to bend coil fin material.
CONDENSATE DRAIN PAN AND PIPE
Check and clean all dirt and debris from pan. Ensure drain line is free
flowing and unobstructed.
MAINTENANCE UPDATES
Check regularly for a current copy of the maintenance program log, which can
be found at under “product information”.
WSH6 HORIZONTAL SERIES IOM
WSH6 HORIZONTAL SERIES – IOM
CLEANING/FLUSHING
Before the unit is connected to the supply water, the water circulating system
must be cleaned and flushed to remove any dirt or debris for the system.
1. Connect the supply and return water lines together in order to bypass the
unit. This will prevent dirt or debris from getting into the system during the
flushing process.
2. Start the main water circulating pump and allow for water to circulate in
the system. Open drains at the lowest point in the system and drain out the
water while simultaneously filling the loop with city water. Continue to
exchange the loop water with the city water for a minimum of two hours, or
until drain water is clear. During this time, check to make sure there are no
leaks within the system.
3. Open all drains and vents to drain water system and refill with clean
water. Test the system water quality and treat as necessary in order to bring
water quality to within requirements for the system. Water PH level should be
7.5 to 8.5. Antifreeze may be added if required.
4. Connect the water-source heat pump supply and return lines, following
proper installation procedures outlined in the piping installation section.
After the installation has been checked for leaks, bring the water-loop to the
desired set point and vent any air within the loop.
UNIT PERFORMANCE
Record performance measurements of volts, amps and water temperature
differences (both heating and cooling). A comparison of logged data with
start-up and other annual data is useful as an indicator of general equipment
condition.
UNIT LOCKOUT
Air or water problem could cause periodic lockouts. The lockout (shutdown) of
the units is a normal protective result. Check for dirt in the water system,
water flow rates, water temperatures, airflow rates (may be caused by dirty
filter) and air temperatures.
LABORATORY TESTING
When the unit has less than 100 operational hours and the coils have not had
sufficient time to be “seasoned”, it is necessary to clean the dry coil with a
mild surfactant such as Calgon to remove the oils left by manufacturing
processes.
51
WSH6 HORIZONTAL SERIES – IOM
TROUBLESHOOTING
PROBLEM HTG CLG
POSSIBLE CAUSE
CHECKS & CORRECTIONS
Power supply off – apply power; close disconnect.
Blown fuse – replace fuse or reset circuit breaker. Check for correct
fuses.
X X Green Status Light Off
Voltage supply low – If voltage is below minimum voltage specified on unit nameplate.
Check for 24VAC between R and C on WSCM board
Check line voltage at circuit breaker and disconnect
Check for line voltage between L1 and L2 on the contactor
ENTIRE UNIT DOES NOT RUN
Check primary / secondary voltage at transformer Set the fan to “ON”, the fan
should run. Set thermostat to “COOL”
and lowest temperature setting, the unit should run in the cooling mode
(reversing valve energized). Set unit to “HEAT” and the
highest temperature setting, the unit should run in the heating
mode. If neither the blower nor compressor run in all three cases,
X X Thermostat
the thermostat could be mis-wired or faulty. To ensure mis-wired
or faulty thermostat verify 24 volts is available on the condenser
section low voltage terminal strip between “R” and “C”, “Y” and “C”, and “O”
and “C”. If blower does not operate, verify 24 volts between terminals “G” and
“C” in the air handler. Replace the
thermostat if defective.
X
Reduced or no water flow in cooling
Check pump operation or valve operation setting. Check water flow, adjust to proper flow rate.
X
Water temperature out of range in cooling
Reduce water temperature to within design parameters.
Check for dirty air filter and clean or replace.
X
HP FAULT CODE
12 – HIGH
PRESSURE
X
Reduced or no airflow in heating
Air temperature out of range in heating
Check fan motor operation and airflow restrictions. Dirty evaporator coil
clean if required. Too high of external static pressure. Check static vs
blower tables.
Bring return air temperature within design parameters.
X
X
Overcharged with refrigerant
The unit is overcharged with refrigerant. Reclaim refrigerant, evacuate and recharge with factory recommended charge.
X X Bad HP switch
Check switch continuity and operation. Replace if needed.
X
X
Non-condensables in system
Vacuum system and re-weigh in charge.
X X Restricted TXV
Check superheat and subcooling. Replace if necessary.
X X Insufficient charge
Check for refrigerant leaks, repair and recharge system.
X
Compressor pump down at Check charge and start-up water flow. start-up
X LP FAULT CODE
Reduced water flow in heating
Check pump operation or water valve operation/setting. Plugged strainer or filter? Clean or replace. Check water flow. Adjust to proper flow rate.
13 – LOW PRESSURE
X
Water temperature out of Bring water temperature within design parameters. range
Check for dirty air filter and clean or replace.
X Reduced airflow in cooling Check fan motor operation and air flow restrictions.
Too high of external static? Check static vs blower table.
X
Air temperature out of range
Too much cold vent air? Bring entering air temperature within design parameters.
Table 26 Troubleshooting Table
52
WSH6 HORIZONTAL SERIES IOM
TROUBLESHOOTING CONTINUED
WSH6 HORIZONTAL SERIES – IOM
PROBLEM HTG CLG
POSSIBLE CAUSE
CHECKS & CORRECTIONS
X
Reduced or no water flow in heating
Check pump operation or water valve operation/setting. Plugged strainer or filter. Clean or replace. Check water flow adjust to proper flow rate.
CO1 FAULT
X
CODE 14 – LOW
WATER TEMPERATURE
X
Inadequate anti-freeze level Improper low water temperature setting (30F vs 10F)
Check anti-freeze density with hydrometer. Clip CO1 jumper (JW1) for antifreeze (10F) use.
X
Water temperature out of Bring water temperature within design parameters. range
X X Bad thermistor
Check temperature and impedance correlation per table.
CO1 FAULT CODE 15 AIR
COIL LOW
X
Reduced or no airflow in cooling
Check for dirty air filter and clean or replace. Check fan motor operation and airflow restrictions. Too high of external static pressure. Check static vs blower tables.
X
Improper low temperature Normal airside applications will require 30F only. setting (30F vs 10F)
TEMPERATURE
X
Air temperature out of range
Return air too cold? Bring entering air temperature within design parameters.
X X Bad thermistor
Check temperature and impedance correlation per table.
X
CONDENSATE FAULT CODE 16
X
CONDENSATE
OVERFLOW
X Blocked drain X Improper Trap
X Poor drainage
X Moisture on sensor
Check for blockage and clean drain. Check trap dimensions and location. Check for piping slope away from unit. Check drain pan for dirty pan or clogged drain nipple. Check for moisture on sensor shorting the sensor to ground.
Check power supply and 24VAC voltage before and during
operation.
OVER/UNDER
X
FAULT CODE17
X Under voltage
Check power supply wire size. Check compressor starting draw. Need hard start kit? Check 24VAC and unit transformer tap for correct power supply
OVER/UNDER
voltage.
VOLTAGE
Check power supply and 24VAC voltage before and during
X X Over voltage
operation. Check 24VAC and unit transformer tap for correct power supply
voltage.
SWAPPED CO1 &
CO2 CODE 18 THERMISTOR
X
X CO1 and CO2 swapped
Reverse positions of thermistors.
FAULT
TEMPERATURE
SENSOR ERROR X FAULT CODE 19
X CO1 and CO2 mis-wired Check for proper wiring of CO1 and CO2 sensors or jumper. Table 27 Troubleshooting Table Continued
WSH6 HORIZONTAL SERIES IOM
53
WSH6 HORIZONTAL SERIES – IOM
TROUBLESHOOTING CONTINUED
PROBLEM
BLOWER OPERATES BUT COMPRESSOR DOES NOT RUN
UNIT SHORT CYCLES
INSUFFICIENT COOLING OR
HEATING
ONLY COMPRESSOR
RUNS
HTG CLG
POSSIBLE CAUSE
CHECKS & CORRECTIONS
X
X Capacitor
Check for correct size capacitor, replace If defective.
X
X Thermostat
Check setting, calibration and wiring.
X
X Wiring
Check for loose or broken wires at compressor, capacitor or contactor.
X
X Safety Controls
Check control board fault LED for fault code.
X
X
Compressor overload open
If the compressor is cool and the overload will not reset, replace the compressor.
X
X
Compressor motor grounded
Internal wiring grounded to the compressor shell. Replace compressor. If compressor burnout, install new filter dryer.
X
X
Compressor windings open
After compressor has cooled, check continually of compressor windings. If the windings are open, replace the compressor.
X
X Refrigerant charge
The unit is low on refrigerant. Check for refrigerant leak, repair, evacuate and recharge with factor recommended charge.
X
X Low pressure switch
Check for defective or improperly calibrated low pressure switch.
X
X Unit oversized
Recalculate heating and cooling loads.
X
X Thermostat
Thermostat installed near a supply air register, relocate thermostat. Check heat anticipator.
X
X Wiring and controls
Loose connections in the wiring or a defective compressor contactor.
X
X Dirty air filter
Check for dirty air filter and clean or replace
X
X Unit in “Test Mode”
Cancel test mode by shorting test pins for three seconds or wait for 20 minutes for auto exit
X
X Unit undersized
Recalculate heating and cooling loads. If not excessive, possibly adding insulation will rectify the situation.
X
X
Loss of conditioned air by leaks
Check for leaks in ductwork or introduction of ambient air through doors or windows.
X
X Airflow
Lack of adequate airflow or improper distribution of air. Replace dirty air filter.
X
X Refrigerant charge
Low on refrigerant charge causing inefficient operation.
Check for defective compressor. If discharge is too low and
X
X Compressor
suction pressure is too high, compressor is not pumping properly.
Replace compressor.
Defective reversing valve creating bypass of refrigerant from
X
X Reversing valve
discharge to suction side of compressor. Discharge is too low and
suction is too high. Replace reversing valve.
X
X Operating pressures
Compare unit operating pressures to the pressure / temperature chart for the unit.
X
X
Refrigerant metering device
Check for possible restriction or defect. Replace is necessary.
X
X
Moisture, noncondensables
The refrigerant system may be contaminated with moisture or non-condensables. Reclaim refrigerant, evacuate and recharge with factory recommended charge. Replace filter dryer.
X
X Thermostat wiring
X
X Fan motor relay
Check thermostat wiring at WSCM board and thermostat. Jumper “G” and “R” for
fan operation Jumper “G” and “R” for fan operation. Check for 24VAC at fan
relay coil. Check for line voltage across fan relay contacts.
X
X Fan motor
Check for line voltage at motor. Check capacitor.
Table 28 Troubleshooting Table Continued
54
WSH6 HORIZONTAL SERIES IOM
TROUBLESHOOTING CONTINUED
WSH6 HORIZONTAL SERIES – IOM
PROBLEM HTG CLG
POSSIBLE CAUSE
CHECKS & CORRECTIONS
X
X Thermostat setup
UNIT DOESN’T
OPERATE IN
X
X Thermostat wiring
COOLING
X
X Reversing valve
Check that thermostat is wired to energize the reversing valve from “O”
terminal. (Cooling mode).
Check thermostat wiring at WSCM board and thermostat. Jumper “o” and “R” to
energize reversing valve (click).
Set thermostat to cooling and check for 24VAC at reversing valve
coil.
X
X Dirty filter
Replace or clean.
Check for dirty air filter and clean or replace.
X
Reduced or no airflow in heating
Check fan motor operation and airflow restrictions. Too high of external static? Check static vs blower table.
X
Reduced or no airflow in cooling
Check for dirty air filter and clean or replace. Check fan motor operation and airflow restrictions. Too high of external static? Check static vs blower table.
Check supply and return air temperatures at the unit and at
INSUFFICIENT
X
X Leaky duct work
CAPACITY/ NOT
distant duct registers if significantly different, duct leaks are present.
COOLING OR
X
X Low refrigerant charge
Check superheat and subcooling per chart.
HEATING
X
X Restricted metering device Check superheat and subcooling per chart. Replace.
X Defective reversing valve Perform RV touch test.
X
X
Thermostat improperly located
Check location and for air drafts behind stat.
X
X Unit undersized
Recheck loads and sizing. Check sensible cooling load and heat pump capacity.
X
X
Scaling in water heat exchanger
Perform scaling check and clean if necessary.
X
X
Inlet water too hot or too cold
Check load, loop sizing, loop backfill, ground moisture.
LOW DISCHARGE X
Too high of airflow
Check fan motor speed selection and airflow table.
AIR TEMPERATURE IN X
Poor performance
See “Insufficient Capacity”.
HEATING
X Too high of airflow
Check fan motor speed selection and airflow table.
HIGH HUMIDITY
X Unit oversized
Recheck loads and sizing. Check sensible cooling load and heat pump capacity.
Table 29 Troubleshooting Table Continued
WSH6 HORIZONTAL SERIES IOM
55
WSH6 HORIZONTAL SERIES – IOM
SUPPORT/REFERENCE MATERIAL
REFERENCE CALCULATIONS
HEATING
LDB = EDB +
QH GPM x 500
LWT = EAT +
QA cfm x 1.08
COOLING
LDB = EDB
SC
cfm x 1.08
QR LWT = EWT +
GPM x 500 LC = QC SC
SC SHR =
QC
COMMON CONVERSIONS
Air Flow Water Flow Static Pressure Water Pressure Drop Temperature Power Weight Weight EER COP
I/s = CFM x .47 I/s = GPM x .06 Pa = IWC x 249 FOH = PSI x 2.3 °C = (°F 32) x 5/9 kW = Btuh / 3412 oz = lb x 16 kg = lb / 2.2 COP x 3.413 EER / 3.413
ABBREVIATIONS & DEFINITIONS
LDB = Leaving air temperature dry bulb °F EDB = Entering air temperature dry
bulb °F GPM = Water flow rate gallons per minute CFM = Airflow rate cubic feet
per minute QH = Heating capacity Btuh QA = Heat of absorption Btuh SC =
Sensible cooling capacity Btuh QR = Heat of rejection Btuh LC = Latent cooling
capacity Btuh SHR = Sensible heat ratio
56
WSH6 HORIZONTAL SERIES IOM
STARTUP & PERFORMANCE CHECKLIST
WSH6 HORIZONTAL SERIES – IOM
FIGURE 23 Startup & Performance Checklist
WSH6 HORIZONTAL SERIES IOM
57
WSH6 HORIZONTAL SERIES – IOM
NOTES
58
WSH6 HORIZONTAL SERIES IOM
NOTES
WSH6 HORIZONTAL SERIES – IOM
WSH6 HORIZONTAL SERIES IOM
59
P.O. Box 270969 Dallas, TX 75227 www.firstco.com or
www.ae-air.com
The manufacturer works to continually improve its products. It reserves the
right to change design and specifications without notice. ©2023 First Co.,
Applied Environmental Air
References
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