Cellar Cool WM 2500 User manual

WALL MOUNT 2500
VERSION 3
TECHNICIAN’S MANUAL
24V Thermostat Conversion Kit Option
NOTICE: To activate the split system warranty,
the installing certied HVAC/R service tech
must complete the split system warranty
checklist and send back to CellarCool.

Copyright © 2017. CellarCool. All rights reserved.
CellarCool copyrights this manual, the product design, and the design concepts, with all rights reserved. Your rights with
regard to the hardware and manual are subject to the restrictions and limitations imposed by the copyright laws of the
USA. Under copyright laws, this manual may not be copied, reproduced, translated, transmitted, or reduced to any printed
or electronic medium or to any machine-readable form, for any purpose, in whole or in part, without the written consent
of CellarCool.
Every effort has been made to ensure that the information in this manual is accurate. CellarCool is not responsible for
printing or clerical errors.
CellarCool reserves the right to make corrections or improvements to the information provided and to the related
hardware at any time, without notice.
Vinothèque and CellarCool are registered trademarks, and ECE is a trademark of CellarCool. All rights reserved.
Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a
recommendation. CellarCool assumes no liability with regard to the performance or use of these products.
We manufacture, test and certify 100% of our wine cooling units in
the USA. By sourcing the best components and closely controlling our
manufacturing processes, we can assure the highest-quality,
lowest defect manufacturing rates in the industry.
Conforms to ANSI/UL Std 427
Certied to CAN/CSA Std C22.2 No. 120

CellarCool requires that a certied HVAC-R technician install, pipe, evacuate, charge, start and test all split systems. A NATE
Certication is recommended. Please take a moment to review state and city building codes to ensure the safe and proper
installation of the system.
Read, understand and comply with the unit’s installation manual, and piping diagrams.
TABLE OF CONTENTS
Introduction ........................................................................ 2
Quick Start Guide ................................................................... 3
Before You Start ..................................................................... 4
Receiving and Inspecting the System................................................. 5
Quick Reference Guide
System .......................................................................... 6
Unit Specications ............................................................... 7
Evaporator Installation
24V Thermostat Conversion Kit Wiring Instructions.................................. 9
Preparing the Evaporator Unit..................................................... 10
Installing the Evaporator Unit ..................................................... 12
Drain Line........................................................................... 14
Preparing the Condensing Unit ...................................................... 15
Cold Weather Start Installation....................................................... 15
Wiring Diagrams
WM2500 Evaporator with 24V Thermostat Conversion Kit............................ 18
WM2500 Condensing Unit ........................................................ 19
WM2500 Condensing Unit with Cold Weather Start Kit .............................. 20
Installing the Condensing Unit ....................................................... 21
Line Set Piping Diagram ............................................................. 22
System Operation ................................................................... 25
Troubleshooting Guide .............................................................. 27
Maintenance Schedule .............................................................. 30
Technical Assistance & Accessories ................................................... 31
Installation Terms & Conditions ...................................................... 32

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WARRANTY REGISTRATION
In order to activate the warranty of your system, the verication and operational
documentation must be completed by the certied refrigeration technician
installing your system and submitted via mail, fax, or e-mail.
Mail to:
CellarCool
ATTN: Warranty Registration
1738 E. Alpine Avenue
Stockton, CA 95205-2505
USA
Fax to:
209-466-4606
Scan and email to:
[e-mail]
INTRODUCTION
Customer Service
Thank you for purchasing a CellarCool cooling system. We strive to provide the highest-quality products and the best possible
customer service. If you have any questions about your system, please call us at 1-800-343-9463 or visit cellarcool.com.
Using the Manual
This owner’s manual is intended to assist in the proper maintenance of the cooling system. In order to ensure the longevity of
your cooling unit, the equipment should be installed as outlined in the technician’s manual. It is also vital to establish a proper
care and maintenance schedule. Please read and review this manual carefully and keep it for future reference.
What is the CellarCool Cooling System?
The CellarCool cooling system is a specialized refrigeration system designed for one purpose only: to maintain the optimal
temperature and humidity levels conducive to the proper storage and aging of ne wines. This system produces minimal in-cellar
noise and has the most lenient exhaust requirements. An exterior housing is required for outdoor condensing unit installations.
How Does the Cooling System Work?
Similar to the air conditioning systems used for homes, the evaporator unit and condensing units are installed in separate
locations and are connected by a refrigerant line set. The evaporator portion is commonly installed in the wine cellar, with the
condensing unit is located either outside or in a remote indoor location that is ventilated. An exterior housing is required for
outdoor condensing unit installations.
Temperature Setting
The system is designed to maintain a cellar temperature of 55°F as long as the ambient temperature does not exceed 110°F.

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Pump Down Cycle
CellarCool’s split systems operate on a pump down cycle dierent from traditional air conditioners. As such, there is no wiring
between the condensing unit and evaporator unit. (However, if the system is equipped with a Cold Weather Start Kit, it will require
two 24-volt wires running from the evaporator unit to the condensing unit.)
CellarCool units utilize a solenoid valve on the liquid line and a low-pressure switch on the suction line. When the thermostat calls
for cooling, the solenoid valve opens, permitting the ow of refrigerant. The low-pressure switch then signals the compressor to
cycle on.
When the cellar reaches the desired temperature and the thermostat is satised, the solenoid will close, stopping the liquid
refrigerant ow to the TXV valve. The compressor will continue to operate until most of the refrigerant on the low side boils o
and is pumped through the compressor into the condenser coil and receiver. As the suction pressure falls below the pressure
control setting, the low-pressure switch will signal the compressor to cycle o. Most of the refrigerant is now stored between the
condensing unit and receiver.
Cold Weather Start Kit
If you are installing a unit equipped with the optional cold weather start kit, run two low-voltage wires from the evaporator unit to
the condensing unit.
…………………………………………………………………………………………………
WARNING: Do not utilize a ground fault interrupter, as it will prevent
the unit from drawing the necessary amperage to start the unit.
QUICK START GUIDE*
TXV Adjustments
A. A TXV adjustment may be necessary based on ambient temperatures in the cellar and at the condensing unit.
B. Adjust the TXV until the superheat measured at the evaporator coil is 8-12°F. (Total superheat should be 20-30°F.)
C. Under normal operation, with the wine cellar at 55°F and the ambient temperature at 85°F, the low side pressure should be
between 28-32 PSI and the high side should be between 170-180 PSI.
*Further system operation information is available on page 25.
Liquid Line King Valve
This location is used to charge the system with liquid refrigerant
and identify the high side pressure of the system.
Calculating Subcooling
To determine the subcooling of the system, calculate the dierence
between the high side pressure of the system (converted to
temperature) and the temperature of the liquid line. The temperature
of the liquid line will be taken at the outlet of the receiver.
*Saturation temp — liquid line temp
5-9°F SUBCOOLING REQUIRED FOR WARRANTY APPROVAL
TXV
The TXV is preadjusted at the factory. If the superheat is not
within 8-12°F, the TXV will need to be adjusted.
ADJUSTING THE TXV
Use a ⁄” hex key to remove the cap from the TXV superheat
adjustment port. With the cap removed, insert the hex key into
the superheat adjustment port. Increase superheat by turning
the hex key clockwise. Decrease superheat by turning the hex
key counterclockwise.

Page 4 | 1-855-235-5271 CWM 040418
BEFORE YOU START 1-800-343-9463
1. Inspect all components prior to installation. If damage is found, please contact your distributor or CellarCool Customer
Service at 1-800-343-9463.
2. The evaporator unit and condensing unit each require a dedicated 115V, 20-amp circuit. Use a surge protector with the unit.
Do not use a GFI (ground fault interrupter) line.
3. The evaporator unit and condensing unit require no communication lines unless the system is equipped with a Cold Weather
Start Kit. If the system is equipped with a Cold Weather Start Kit, a low-voltage 18-2 thermostat wire will need to be run
between the evaporator unit and the condensing unit.
4. A standard 18-5 thermostat wire must be run from the evaporator unit to the thermostat.
5. You are REQUIRED to install a drain line to remove condensation from the evaporator unit.
6. The warranty is not active until a warranty checklist has been received, reviewed, and approved.
7. The system is intended for use in properly designed and constructed wine cellars. Hire a professional wine storage
consultant with a valid contractor’s license to build your wine cellar.
8. CellarCool requires that all split systems be installed by a certified HVAC-R technician only. NATE or equivalent is recommended.
If you encounter a problem with your CellarCool system, please refer to the Troubleshooting Guide. If you have any further
questions or concerns, or need technical assistance, please contact CellarCool’s Customer Service at 1-800-343-9463. Please be
sure all testing has been completed prior to contacting Customer Service. Please have your results ready for your representative.

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(1) WM2500 evaporator unit
Condensing Unit Box:
(1) Condensing unit
RECEIVING & INSPECTING THE SYSTEM
Evaporator Unit Box:
Upon receiving your CellarCool unit:
• Use caution when lifting and check package for damage.
• Lift only at the designated hand-hold locations on the shipping container, or fully support the unit from underneath. A
shipment may include one or more boxes containing accessories.
• Before opening the container, inspect the packaging for any obvious signs of damage or mishandling.
• Write any discrepancy or visual damage on the bill of lading before signing.
• Allow the condensing unit to sit for 24 hours prior to start-up. The condensing unit can be placed in the installation
location, piped and evacuated during this time.
Note: CellarCool units are manufactured in the USA and tested prior to shipment.
• Review the packing slip to verify contents
• Check the model number to ensure it is correct.
• Check that all factory options ordered are listed.
If any items listed on the packing slip do not match your order information,
contact CellarCool Customer Service immediately.
Check all shipped boxes for the following contents:
Please leave the unit in its original box until you are ready for installation. This will allow you to move the product safely without
damaging it. When you are ready to remove the product from the box, refer to the installation instructions.
TIP: Save your box and all packaging materials. They provide the only safe means of transporting/shipping the unit.
Documentation bag:
• WM2500 Version 3 owner’s manual
• WM2500 Version 3 technician’s manual
• R-134a split system warranty checklist
• WM2500 evaporator unit installation template
Accessory kit bag:
• Evaporator installation hardware bag
Condensing unit accessory kit:
• (1) Filter drier
• (1) Sight glass
Evaporator installation hardware bag:
• (2) ½” x ½” nylon barbed tting
• (1) ½” barbed tee
• (1) Double-D strain relief
• (4) ¾” adhesive cable tie mounts
• (2) Small cable ties
• (4) #8 x 1¾” hex-head screws

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QUICK REFERENCE GUIDE
Front / Side View
Rear / Side View
Filter grille
Evaporator unit (fan coil unit)
Thermostat wire routing for
optional 24V thermostat (NOT
INCLUDED)
INSIDE CELLAR (Option 2)
THROUGH THE WALL
(Option 1)
Knockout for wiring
Line set knockout
Knockout for drain line
Knockout for wiring
Mounting keyholes (4)
Line set knockout
Knockout for drain line
REAR VIEW
QUICK REFERENCE GUIDE

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WM2500 SPECIFICATIONS
Model WM 2500-CR Unit
(Fan Coil Unit)
WM 2500-S Condenser
(Air-Cooled Condensing Unit)
Cellar Size (cu. ft.) 500
Dimensions 10.5”H x 20”W x 13”D 8.9”H x 11.5”W x 16”D
BTUh with 90°F air enter-
ing the condenser coil. 1730
CFM 99 190
Refrigerant R-134a
Condensing Unit HP 1/6
Voltage Rating 115V (15-amp dedicated circuit required)
Weight (lbs) 25 38.8
Amps (starting/running) 2/1 13.8/3.44
dBA 51 65
Line Set Suction line ⁄” OD; liquid line ¼” OD
Drain Line ½” ID clear plastic tubing (not included)
Installation
Evaporator unit is installed in the cellar. The condensing unit is installed up to 100 line feet
away and in accordance with the installation specications found in the
technician’s manual.
Thermostat Aftermarket (24V thermostat not included)
Temp. Delta 55°F temperature dierential
(maintains proper cellar temperature when exhaust environment does not exceed 110°F)
Warranty Two-year limited warranty (parts and labor)
Filter Grille
Evaporator unit

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SPLIT SYSTEM CHECKLIST
In order to activate the warranty for this product, the information here must be complete and accurate. Any
incorrect or omitted information will result in a return trip by the installing technician at their cost.
Note: All readings need to be taken while the compressor is running.
DATA RECORDINGS
Line Set Information
A. Line set length:
B. Suction line OD:
C. Liquid Line OD:
Sub Cooling
A. Measure head pressure at liquid line king valve. Convert pressure to temp using conversion chart.
B. Temp of liquid line at king valve:
C. Complete sub cooling calculation: A – B =
Superheat
A. Measure suction pressure at the suction line service valve, convert to temp.
B. Measure the temperature of the suction line at the outlet of the evaporator.
C. Complete superheat calculation: A – B =
NOTE: There may be a need to adjust the TXV to get the correct superheat levels.
Bottle Probe
A. Install probe in bottle of warm water to keep system operating.
Temperature Dierential at the Evaporator
A. Measure return air and supply air temperatures at the evaporator to ensure adequate cooling of air in cellar.
Voltage and Amp Draw
A. Measure voltage to compressor and amp draw.
Charging the System
A. Fill system until bubbles dissipate from sight glass.
NOTE: Be careful not to overcharge the system.
Compressor Temperature
A. Measure temperature at bottom of compressor.
NOTE: Cool temp may indicate liquid in the compressor.
Condensation Drain Test
A. Pour water into the drain pan to assure it drains properly.

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24V THERMOSTAT CONVERSION KIT WIRING INSTRUCTIONS
The 24V thermostat conversion kit requires a standard 18-5 thermostat wire to be run from the evaporator unit to the
thermostat. The white wire will not be used, as there is no heating function. (Some thermostats need a common wire and some
do not; the unit is equipped with a common wire if needed.)
If the system is equipped with the cold weather start kit a standard 18-2 thermostat wire must be run between the evaporator
unit and the condensing unit.
24V Wiring Connections (Evaporator)
1. Route a standard 18-5 thermostat wire into the evaporator unit.
2. Locate the wire thermostat connection cable inside of the evaporator unit.
3. Connect the wires according to color (yellow to yellow, red to red, green to green, and blue to blue).
4. If the system is equipped with a cold weather start kit, connect one wire from the 18-2 thermostat wire to the low-voltage
yellow wires (2). Then connect the other 18-2 wire to the blue low-voltage wires (2).
Thermostat Wiring Connections
Follow the thermostat installation instructions. NOTE: The white wire will not be used, as there is no heating function.
NOTE: To ensure correct system operation, the
24V thermostat must be placed inside the
wine cellar, preferably in a central location
away from any airow.
R/RC
Y
G
C
Thermostat
Evaporator Unit
Condensing Unit
Grey (13)
Purple (12)
Cold Weather Start Kit Wiring Connections
If the system is equipped with a cold weather start
kit, connect one of the 18-2 thermostat wires to the
purple #12 wire. Connect the other 18-2 wire to the
grey #13 wire.

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PREPARING AND INSTALLING THE EVAPORATOR UNIT
• Drill
• ⁄” drill bit
• ¼” socket drill bit
• ¼” wrench
• Phillips-head screwdriver
• Tape measure
• Brazing torch
• Drywall saw
• Ladder
• Level
• Pliers
• Pencil
Required Tools:
1. Pull the lter grille away from the evaporator unit.
2. Cut the zip tie holding the circular connectors and wires
on the rear left corner of the interior of the unit.
3. Unscrew the nut attached to the circular connector.
4. Install strain relief around thermostat wires if routed the
circular connector in the bottom corner of the unit (see
illustration).
Thermostat wire routing
for optional 24V thermostat (NOT INCLUDED)
DRAIN PAN
Strain
relief
Thermostat
wire
Unit
panel

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6. Depending on the desired installation, remove the rear or bottom
knockouts for the line set, drain line, and power cord.
7. Using a ⁄”drill bit, and drilling from the outside of the unit, cut holes
through the unit’s insulation for the line set and drain line.
Power
Line Set
Drain Line

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INSTALLING THE EVAPORATOR UNIT
1. Locate two (2) wall studs in the desired location.
2. Mark vertical lines on each stud 16” apart.
Note: The top of the unit must be installed a minimum of
6” and a maximum of 18” from the ceiling.
Note: The evaporator is designed to be mounted on two standard wall studs spaced 16” apart.
3. Mark an intersecting horizontal line at the desired height of
the unit.
4. Place the installation template on the wall, lining up the
vertical lines through the sight slots.
5. With a pencil, mark the mounting screw holes and draw a
location for the access hole on the installation template.
6. Set the installation template aside.
7. Install the supplied four (4) 2”#8 hex-head
screws at the locations marked, leaving ⁄”
between the wall surface and screw head.
8. Cut out an access hole for the line set, drain line, and power wires. Be sure to clear the
hole of all debris and insulation.
9. Raise the evaporator to the installation location. Align the rear keyholes with the
mounting screws and mount the unit.
1/8”
WALL
STUD

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12. Route power supply wires into the unit through the power
knockout and install the supplied strain relief.
11. Remove the line set caps. Route the ⁄” suction line
and ¼” liquid line into the unit and braze.
Note: Angle the ame up and away from any electrical
lines and insulation while brazing inside of the unit.
10. Using a ¼”wrench or socket, tighten the accessible
mounting screws on the left-hand side of the interior of the
unit.
Note: For ease of installation, remove the top panel after
securing unit to wall.
13. Connect power supply wires to the pre-installed butt splice
connectors located inside of the unit (hot=black, neutral=white,
ground= green).
Note: Reinstall top panel if you removed it earlier.
14. Reinstall the access panel removed in Step 1 on page 10 by
pushing the four corners into place.

Page 14 | 1-855-235-5271 CWM 040418
Routing the tubing out of the unit:
Cut a small piece of ½” tubing and connect one
end to the drip tray port and the other to a
90-degree fitting. (This will direct the tubing
toward the back of the unit where the tube will
exit the unit.) Be sure to extend the tubing far
enough outside the housing to extend through
the wall if necessary.
If routing out of the rear: Cut a piece of tubing
long enough to protrude out of the knockout on
the back side of the unit.
If routing out of the bottom: Cut a piece of
tubing long enough to reach the knockout in
the bottom of the unit and install the supplied
90-degree fitting. (This will direct the tubing out
of the bottom of the unit without the risk of
kinking the tubing.) DO NOT USE TEE WHEN
ROUTING OUT OF THE BOTTOM.
Routing to discharge location if routed out
of the bottom:
Connect the drain line directly to the second
90-degree barb fitting previously installed. Route
the drain line to an appropriate drain location.
No tee is required if draining through the
bottom of the unit.
NOTE: The fitting should be placed
vertically with the 3” cutout facing
up.
Failure to install the drain line
voids the warranty.
To prevent mold from growing,
allow the drain line to hang
above the water line.
WRONG: Drain line is under water.
DRAIN LINE
Drain Line
All systems come with a drain line connection tee and two 90-degree fittings. The unit is equipped with a ½” OD barbed fitting
coming from the drip tray. (NOTE: ½” ID clear PVC tubing will need to be purchased and installed by the installing technician.)
Installation of the drain line is mandatory, whether it leads through the wall and out of the cellar or remains inside the cellar.
During operation, the cooling system will strip excess water from the air in order to maintain the proper level of humidity within
the cellar. However, in extreme humidity, additional condensate will be removed; thus the drain line will prevent overflow and
leakage by discharging the excess condensate.
Condensation Drain Line (not provided, but required)
The condensation drain line tube moves excess condensation from the evaporator unit to a proper discharge
location. It is important for the drain line tube to be properly connected in order to prevent leakage and other problems associ-
ated with excess condensation.
Failure to use the condensation drain line tube will void the warranty on the unit.
Routing to discharge location if routed out of the rear:
Insert the middle barb of the barbed tee fitting into the end of the drain
line coming from the evaporator. Rotate fitting so tee is in the orientation
shown in the diagram below. Connect a 3-inch piece of ½” drain line to
the barb on top. Connect the remaining “long” piece of drain tubing to
the bottom barb of the tee. Route the drain line to an appropriate drain
location.

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PREPARING THE CONDENSING UNIT
Electrical Needs
The condensing unit requires a dedicated 115V, 15-amp circuit. The unit draws a large inrush current for about 1 second
the instant the compressor starts. With a dedicated circuit and circuit breaker, the condensing unit will have sucient power
for eective operation. (The compressor is controlled by a low-pressure switch mounted on the condensing unit. This feature
eliminates the need for wiring between the evaporator unit/fan coil unit and the condensing unit.)
• Ensure the voltage supplied matches the rating specied on the unit spec label.
• Provide a non-GFI dedicated circuit and an appropriate outlet for the evaporator unit.
• Provide a dedicated circuit and circuit breaker for the condensing unit.
• Provide a weatherproof disconnect for the condensing unit if it is located outside.
Power surges and spikes can damage sensitive electrical equipment. CellarCool recommends plugging the unit into a surge
protector or power conditioner in order to protect your system. As outlined in our terms and conditions, power surges and spikes
are not covered under warranty.
WE RECOMMEND THAT YOU DO NOT USE A GROUND FAULT INTERRUPTER (GFI) WITH THIS PRODUCT.
In case the system should lose power, check the home/main circuit breaker. If the system does not respond properly, refer to the
Troubleshooting Guide on page 27.
When connecting Cold Weather Start Kit:
Evaporator: Connect one wire from the 18-2
thermostat wire to the low-voltage yellow wires (2).
Then connect the other 18-2 wire to the blue low-
voltage wires (2).
Condensing Unit: Connect the
other end of the 18-2 low-voltage
thermostat wire to the grey and
purple wires located in the grey
electrical box on the condenser
skid.

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WM 2500 CONDENSER COMPONENTS
Standard
Electrical Box
Receiver
Liquid Line
Service Valve
Suction Line
Service Valve
Fan Cycling Switch
Cut Out: 75 psi
Cut In: 120 psi
Low Pressure Switch
Cut Out: 5 psi
Cut In: 20 psi
Cold Weather Start Kit
Electrical Box
Fan Cycling Switch
Cut Out: 75 psi
Cut In: 120 psi
Low Pressure Switch
Cut Out: 5 psi
Cut In: 20 psi

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COLD WEATHER START KIT CONDENSER COMPONENTS
Thermal Switch
Receiver Heater
Compressor Contactor
(Magnecraft Relay)
Enclosed Power
Relay
Bypass Timer
Start Assist
(Magnecraft Relay)
COLD WEATHER START KIT
ELECTRICAL SET UP

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WM 2500 EVAPORATOR UNIT WITH 24V THERMOSTAT CONVERSION
KIT WIRING DIAGRAM
1 4
Line
Neutral
Fan
Solenoid
24v
Transformer
Solenoid
Relay
1
0
4
6
Mini/WM Version 3 with
24V Thermostat Conversion Kit
Fan
Relay
1
0
4
6
Black
Black
Black
Yellow
Blue
Blue
Blue
Blue
White
Blue
Black
Blue
Green
Yellow
Red
Black
14
Black
Black
White
Black
Blue
White
Ref.
Solenoid
Green
Panasonic
FV-08-11VF5
Green
White
Green
C
G
Y
R
Thermostat
RC
Field Installed
LEGEND
Factory Installed
White
White
115V Line
115V Neutral
Ground
Black
24V Common
24V Hot
Units equipped with a factory installed CWSK Option, must
have an 18-2 Thermostat wire run from the evaporator to the
condensing unit. Connect the yellow wire to the purple #12 wire,
and connect the blue wire to the grey #13 wire.
Bare End