COOL BOSS CB-12SL User manual

5240 Willis Rd.
Theodore, AL 36582 USA
Toll Free: 1 [phone]
Tel: [phone]
coolboss.com
Cool Boss™ Portable Evaporative Air Cooler with
Swing Louvers
Installation and Operation Manual
Manual Revision A1 — August 2022 — Manual P/N 5900274
Models:
•CB-12SL / SLH
•CB-14SL / SLH
⚠
DANGER
Read the entire contents of this manual before using this
product. Failure to follow the instructions and safety precautions in
this manual can result in serious injury or death. Make sure all other
operators also read this manual. Keep the manual near the product
for future reference. By proceeding with setup and operation,
you agree that you fully understand the contents of this
manual and assume full responsibility for product use.
CB-12SL / SLH
CB-14SL / SLH

Manual. Cool Boss™ Portable Evaporative Air Cooler with Swing Louvers, Installation and Operation Manual,
P/N 5900274, Manual Revision A1, August 2022.
Copyright. Copyright © 2022 by BendPak Inc. All rights reserved. No part of this manual may be reproduced,
adapted, translated, or transmitted by any means, electronic or mechanical, for any purpose or in any form,
without prior written permission of BendPak Inc.
Trademarks. Cool Boss, the Cool Boss logo, and BendPak are trademarks of BendPak Inc. All other company,
product, and service names are used for identification only. All trademarks and registered trademarks mentioned
in this manual are the property of their respective owners.
Limitations. Every effort has been made to ensure complete and accurate instructions are included in this
manual. However, product updates, revisions, and/or changes may have occurred since this manual was
published. BendPak reserves the right to change any information in this manual without incurring any obligation for
equipment previously or subsequently sold. BendPak is not responsible for typographical errors in this manual.
Warranty. The Cool Boss warranty is more than a commitment to you: it is also a commitment to the value of
your new product. Visit coolboss.com/warranty for complete warranty information.
Safety.Your new product was designed and manufactured with safety in mind. Your safety also depends on
proper training and thoughtful operation. Do not set up, operate, maintain, or repair your Cool Boss without
reading and understanding this manual and the labels on the unit.
Owner Responsibility. In order to maintain your product properly and to ensure operator safety, it is the
responsibility of the product owner to read and follow these instructions:
• Follow all setup, operation, and maintenance instructions.
• Make sure product setup conforms to all applicable local, state, and federal codes, rules, and regulations,
such as state and federal OSHA regulations and electrical codes.
• Read and follow all safety instructions. Keep them readily available for operators.
• Make sure all operators are properly trained, know how to safely operate the unit, and are properly supervised.
• Do not operate the product until you are certain that all parts are in place and operating correctly.
• Carefully inspect the product on a regular basis and perform all maintenance as required.
• Service and maintain the unit only with approved replacement parts.
• Keep all instructions permanently with the product and make sure all labels are clean and visible.
Unit Information. Enter the Model Number, Serial
Number, and Date of Manufacture from the label on
your unit. This information is required for part or
warranty issues.
Model:
Serial:
Date of Manufacture:

Cool Boss Evaporative Air Cooler 3P/N 5900274 — August 2022 — Rev. A1
Table of Contents
Introduction 3 Operation 22
Shipping Information 4 Maintenance 25
Safety Considerations 4 Troubleshooting 28
Frequently Asked Questions 6 Parts Diagram 29
Specifications 7 Labels 31
Components 9 Maintenance Log 33
Setup 12
Introduction
This manual describes the Cool Boss Portable Evaporative Air Cooler, which keeps your shop or
workplace cool and comfortable on even the hottest summer days.
This manual covers Cool Boss models with a fan diameter of 12 in. / 305 mm and 14 in. / 356 mm
with Swing Louvers. Each model may be ordered in a 110 VAC or a 220 VAC version:
•CB-12SL: 110 VAC, 0.88 A Max., 60 Hz, single phase.
•CB-12SLH: 208 to 230 VAC, 0.42 Amp Max., 50-60 Hz, single phase.
•CB-14SL: 110 VAC, 1.0 A Max., 60 Hz, single phase.
•CB-14SLH: 208 to 230 VAC, .5 Amp Max., 50-60 Hz, single phase.
The Cool Boss units described here operate identically and will be referred to as Cool Boss or Cooler
throughout this manual. Any differences based on the selected power supply or function, will be called
out in the text by the unit’s specific model number.
This manual is mandatory reading for all users of the Cool Boss, including anyone who sets up,
operates, maintains, or repairs it.
⚠DANGER Be very careful when setting up, operating, maintaining, or repairing this equipment;
failure to do so correctly could result in property damage, product damage, injury,
or (in very rare cases) death. Make sure only authorized personnel operate this
equipment. All repairs must be performed by an authorized technician. Do not
make modifications to the unit; this voids the warranty and increases the chances
of injury or property damage. Make sure to read and follow the instructions on the
labels on the unit.
Keep this manual on or near the equipment so that anyone who uses or services the unit can read it.
Assistance with your Cool Boss is available from your dealer, by calling Cool Boss at
[phone], or by emailing [e-mail]. You may also contact Cool Boss for
parts replacement (please have the serial number and model number of your unit available).

Cool Boss Evaporative Air Cooler 4P/N 5900274 — August 2022 — Rev. A1
Shipping Information
Your equipment was carefully checked before shipping. Nevertheless, you should thoroughly inspect
the shipment
before you sign to acknowledge that you received it.
When you sign the bill of lading, it tells the carrier the items on the invoice were received in good
condition.
Do not sign the bill of lading until after you have inspected the shipment. If any of the
items listed on the bill of lading are missing or are damaged, do not accept the shipment until the
carrier makes a notation on the bill of lading that lists the missing and/or damaged goods.
If you discover missing or damaged goods after you receive the shipment and have signed the bill of
lading, notify the carrier at once and request the carrier to make an inspection. If the carrier will not
make an inspection, prepare a signed statement to the effect that you have notified the carrier (on a
specific date) and that the carrier has failed to comply with your request.
It is difficult to collect for loss or damage after you have given the carrier a signed bill of lading. If this
happens to you, file a claim with the carrier promptly. Support your claim with copies of the bill of
lading, freight bill, invoice, and photographs, if available. Our willingness to assist in helping you
process your claim does not make us responsible for the collection of claims or replacement of lost or
damaged materials.
Safety Considerations
Read this manual carefully before using your new product. Do not set up or operate
the product until you are familiar with all operating instructions and warnings. Do not allow anyone else
to operate the product until they are also familiar with all operating instructions and warnings.
⚠WARNING California Proposition 65.This product can expose you to chemicals including
styrene and vinyl chloride which are on a list of over 900 chemicals identified by the
State of California to cause birth defects or reproductive harm. ALWAYS use this
product in accordance with Cool Boss BendPak’s instructions. For more
information go to www.P65Warnings.ca.gov.
Safety Information
•The product is an air-cooling device. Use it only for its intended purpose.
•The product should only be operated by authorized personnel. Children should not be allowed to
operate the Cool Boss. Make sure all operators read and understand the Warning labels and the
Installation and Operation Manual. Keep the manual near the device at all times.
•Never operate the Cool Boss with a damaged Power Cord or Plug.
•When the product is in use, keep all body parts and loose clothing away from it.
•Only use the product indoors in a well-ventilated area. Ensure a window or door is open to allow
adequate air flow.
•Do not make any modifications to the product. This voids the warranty and increases the chances
of injury or property damage.
•Avoid using an extension cord; they can overheat. If you must use an extension cord, make sure it
is a three conductor No. 14 AWG minimum with a three-prong plug/receptacle and does not
exceed 50-feet in length. For 100-foot extension cords use 12 AWG minimum.
•Do not spray the outside of the Cooler with water. Moisture can harm the motor and other parts of
the electrical system.

Cool Boss Evaporative Air Cooler 5P/N 5900274 — August 2022 — Rev. A1
•Only connect the power cord to a grounded, three-prong GFCI protected receptacle.
•Lock at least two Casters before turning on the fan.
•Make a visual inspection of the product before using it. Check for damaged or missing parts.
Do
not use the product if you find problems with the unit
. Instead, remove it from service,
then contact your dealer, call Cool Boss at [phone], or email Cool Boss at
[e-mail].
•Do
not operate the Cool Boss if the Fan has cracked or damaged blades.
•Do
not operate the Cool Boss unless the Media is securely in place.
•Do
not operate the Cool Boss within 35-feet (10.6 m) of an open flame or spark.
•
Always remove the plug from the electrical receptacle by pulling on the plug, not the power cord.
•BendPak recommends making a thorough inspection of the product at least once a year. Replace
any damaged or severely worn parts, decals, or warning labels.
Save these instructions!
Symbols
Following are the symbols used in this manual:
⚠DANGER Calls attention to an immediate hazard that will result in death or severe injury.
⚠WARNING Calls attention to a hazard or unsafe practice that could result in death or severe
personal injury.
⚠CAUTION Calls attention to a hazard or unsafe practice that could result in minor personal
injury, product, or property damage.
Tip Calls attention to information that can help you use your product better.
Liability Information
BendPak Inc. assumes no liability for damages resulting from:
• Use of the equipment for purposes other than those described in this manual.
• Modifications to the equipment without prior, written permission from BendPak Inc.
•Injury or death caused by modifying, disabling, overriding, or removing safety features.
• Damage to the equipment from external influences.
• Incorrect operation of the equipment.

Cool Boss Evaporative Air Cooler 6P/N 5900274 — August 2022 — Rev. A1
Frequently Asked Questions
Question: Is the Cool Boss an air conditioner?
Answer: No. it is an evaporative air cooler, sometimes called a swamp cooler. The fan pulls in hot
outdoor air, a water drip spray system releases water into a Media, the water droplets evaporate when
they meet the hot air, lowering the air temperature by up to 26°F, and the fan blows the cooled air in
the desired direction.
Q: How much air does the Cool Boss cool?
A: Each unit can cool approximately:
Model
Airflow
Cooling Area
CB-12SL / SLH
1,565 cfm / 44.3 cmm
650 ft
2
/ 60.4 m
2
CB-14SL / SLH
2,300 cfm / 65.1 cmm
850 ft
2
/ 79 m
2
Q: What’s the best way to set up my Cool Boss?
A: With the back of the unit facing a source of hot, dry air – which is what the Cool Boss will cool—and
the front facing the area you want to keep cool. It will need to be near a power source also. And
remember, it is portable. So you can move it to where you need it; it does not have to stay in the same
place the whole time.
Q: Does it require special water?
A: No. Clean, ordinary tap water.
Q: Is it hard to control the Cool Boss?
A: Not at all. Only three, easy-to-understand controls on the unit.
Q: What about maintenance?
A: Very little. Basically, keep the Water Reservoir filled with clean tap water and clean the Media once
in a while. Dirt and other pollutants from the environment accumulate in the Media and the Reservoir,
so it is best to clean it every so often. Do not clean the Media by spraying it with high pressure water
while installed in the Cool Boss! Instead, remove the Media using the procedure in the Maintenance
section, then clean it as per the procedure found there.

Cool Boss Evaporative Air Cooler 7P/N 5900274 — August 2022 — Rev. A1
Specifications

Cool Boss Evaporative Air Cooler 8P/N 5900274 — August 2022 — Rev. A1
Model CB-12SL / SLH CB-14SL / SLH
Dimensions
(A x B x C)
27in. x 22 in. x 45 in.
686 mm x 559 mm x 1,143 mm
30 in. x 22 in. x 47 in.
762 mm x 559 mm x 1,194 mm
Fan diameter 12 in. / 305 mm 14 in. / 356 mm
Weight Empty 73 lbs. / 91 kg 79 lbs. / 125 kg
Weight Full 198 lbs. / 90 kg 208 lbs. / 94 kg
Water capacity 15 gal. / 57 liters 15.6 gal. / 59 liters
Maximum airflow 1,565 ft3/min.
44.3 m3/min.
2,300 ft3/min.
65.1 m3/min.
Sound level 69 to 79 dB 64 to 72 dB
UL®Certified Yes Yes
Fan speed 3-Speeds, Low – Medium - High
Fan type Axial
Max. Water
Source Pressure
≈72.5 psi / 0.5 MPa Max. Automatic Water Source Shutoff.
Water Source
Shutoff
The Cool Boss utilizes a Mechanical Float Valve to automatically shut off the
Water Source before exceeding maximum Fill.
Water Pump
Shutoff
The internal Water Pump incorporates an automatic low-level shutoff.
Water
Temperature
<45°C
Housing Antibacterial
Power Cord
Length
15 feet / 4.5 m
Power CB-12SL: 110 VAC, .88 A Max., 60 Hz, single phase.
CB-12SLH: 208 to 230 VAC, .42 Amp Max., 50-60 Hz, single phase.
CB-14SL: 110 VAC, 1.0 A Max., 60 Hz, single phase.
CB-14SLH: 208 to 230 VAC, .5 Amp Max., 50-60 Hz, single phase.
Must be connected to a grounded circuit protected by a circuit breaker or fuse.

Cool Boss Evaporative Air Cooler 9P/N 5900274 — August 2022 — Rev. A1
Components
The Cool Boss Unit
CB-14 pictured below.

Cool Boss Evaporative Air Cooler 10 P/N 5900274 — August 2022 — Rev. A1
This figure Details the interior of the unit, from the back.

Cool Boss Evaporative Air Cooler 11 P/N 5900274 — August 2022 — Rev. A1
The Cool Boss Control Panel
The figure below details the Cooler Control Panel.
Control Functions
Swing Control – Rocker switch on-off. Initiates the Swing Louver left right movement
Water Pump – Rocker switch on-off. Applies power to the Water Pump providing water to the Spray
Bar which then distributes it over the Cooling Media.
Fan Speed – Rotary Switch on-off and three speed settings.

Cool Boss Evaporative Air Cooler 12 P/N 5900274 — August 2022 — Rev. A1
Setup
There are six basic steps in the Cool Boss set-up.
1. Unbox
2. Install the Casters.
3. Install the Media.
4. Determine the Cool Boss location.
5. Fill the reservoir or connect to water.
6. Connect to power.
Tools required for Assembly:
•Hammer
•Pry Bar
•Phillips Screwdrivers
•Metric Open End Wrench Set
Unboxing the Cool Boss
The Cool Boss Cooler is carefully packaged to prevent damage. Exercise care in removing the Cooler
from its packaging. Be careful not to injure yourself on sharp edges or fasteners.
⚠WARNING You must wear the proper protective equipment at all times during setup and
assembly of this Cooler: leather gloves, steel-toed boots, and back belts.
To unbox the Cooler:
Use a hammer and pry bar to carefully remove the shipping container from around the Cool
Boss.
Position the Cooler with its Media side down to provide access to the bottom of the unit. The back
of the shipping container may be used to provide a clear, clean area to work on the Cooler. See
figure below.

Cool Boss Evaporative Air Cooler 13 P/N 5900274 — August 2022 — Rev. A1
Installing the Casters
The Cool Boss is shipped with heavy-duty locking casters to both support and allow easy movement
of the Cooler around your facility. The Casters are shipped in a separate box with the Remote Control.
Locate and install the four swivel Casters using the four bolts and flat washers provided for each
Caster. As detailed in the figure below.
The Casters are shipped in a separate box with the Remote Control.
Lock the two rear Casters by pushing down on the larger pedal. Pushing down on the small pedal
releases the lock.
Have an assistant help rotate the Cool Boss upright onto its Casters.
Bottom View

Cool Boss Evaporative Air Cooler 14 P/N 5900274 — August 2022 — Rev. A1
Installing the Media
The Cooler pulls warm air through a Media saturated with water. This Media incorporates a Moisture
Lock on one side made of a black nonabsorbent resin which reduces evaporation and increases the
efficiency. Properly installed Media is critical to the Cool Boss operation. The black resin side must
always be installed toward the warm air side. Refer to the figure below.
To install the Media:
⚠WARNING Unplug the unit from power before removing Media.
Retrieve the Media for your specific Cool Boss model.
Not to scale, components removed
for clarity.

Cool Boss Evaporative Air Cooler 15 P/N 5900274 — August 2022 — Rev. A1
Remove and retain the three screws securing the Media Holder Splash Guard. Refer to the figure
below.
Not to scale, components removed for clarity.
Insert one Media section into the Cool Boss. Verify the Moisture Lock Black Resin side of the
Media is oriented to the warm-air side. Channels in the Media are oriented to direct the water flow
downward and toward the Warm Air Intake side of the Cool Boss. Slide the first Media as
far left as possible. Refer to the figure below.
Not to scale, components removed for clarity.

Cool Boss Evaporative Air Cooler 16 P/N 5900274 — August 2022 — Rev. A1
Install another section of Media and slide the new section of Media as far right as possible. Orient
the Media channels as in the previous step.
Not to scale, components removed for clarity.
Install the last section of Media in the open middle section. Orient the Media channels as in the
previous step.
Not to scale, components removed for clarity.

Cool Boss Evaporative Air Cooler 17 P/N 5900274 — August 2022 — Rev. A1
Install the Media Splash Guard using the three screws removed in step 2 above.
Not to scale, components removed for clarity.

Cool Boss Evaporative Air Cooler 18 P/N 5900274 — August 2022 — Rev. A1
Find a location for your Cool Boss:
Find a suitable location for the Cool Boss (hot air to the rear, cooling area to the front). The Cool Boss
should be indoors, near an appropriate power and water source, and in a low-traffic and well-
ventilated area.
⚠WARNING This equipment has internal arcing or sparking parts that should not be exposed to
flammable vapors. The unit must not be located in a recessed area or below floor level.
⚠WARNING Verify the floor will support the weight of the Cool Boss with a full reservoir. Also
verify the Floor is level, well-constructed and stable enough to prevent the Cooler
from tipping over.
To choose a location for the Cool Boss Cooler:
Unlock the Casters to roll the Cool Boss. Direct the Fan outlet toward the area to be cooled.
⚠CAUTION To ensure efficient operation, the Cool Boss requires adequate air flow for intake
and exhaust. Verify a window or door is open.
Keep 36" / 914 mm minimum behind the Cool Boss open for air intake.
⚠WARNING Verify the Power Cord and Water Supply Hose are routed to prevent a tripping
hazard and are not routed under carpets or across sharp edges.
Once you have determined and moved the Cool Boss into position, Lock a minimum of two
Casters,by pressing down with your foot on the large pedal locking mechanism on each Caster.
To unlock the Casters, press down on the small pedal.
⚠CAUTION Do not start the Cool Boss until you have locked a minimum of two Casters; this
ensures that unintended movement caused by the thrust of the Fan will not occur.
Fill the Water Reservoir.
There are two options to fill the Reservoir, using a hose connected to the 3/4 inch Water Inlet
Connector with Float Valve, or manually fill the Reservoir through the Reservoir Fill Inlet.

Cool Boss Evaporative Air Cooler 19 P/N 5900274 — August 2022 — Rev. A1
To fill the Reservoir:
You may connect to the Water Inlet Connector on the side of the unit using the standard 3/4 inch
Hose fitting and a Hose that is rated to 72 psi / 0.5 MPa maximum water pressure at your location.
Turn on the water and verify there are no leaks at the connection point. A Hose is not supplied
with the Cool Boss. Refer to the figure below.
Not to scale.
If you are utilizing the 3/4” Water Inlet Connector, the Reservoir Float Valve will shut off the water
before the maximum fill level is exceeded.
⚠CAUTION Do not connect to a water supply with a pressure in excess of ≈72.5 psi / 0.5
MPa. Install a pressure regulator to reduce the pressure, if required.
Alternatively, you may manually fill the Reservoir using the Water Reservoir Inlet found to the right of
the 3/4 inch hose connection.
Remove the Cap and add clean water. Fill to the Max. level only, do not overfill. Water
temperature must be less than 113°F (45°C).
After filling, Replace the Cap, remove and dry any water spilled on the Cool Boss or floor around
the unit.
⚠CAUTION Use only cold clean water. No detergents or additives of any kind.
Model Water Capacity
CB-12SL / SLH ≈15 gal. / 57 liters
CB-14SL / SLH ≈15.6 gal. / 59 liters

Cool Boss Evaporative Air Cooler 20 P/N 5900274 — August 2022 — Rev. A1
Connecting to Power
Before connecting this unit to a power source, verify the required voltage by studying the model
nameplate affixed to your machine. Cool Boss models marked CB-12SL and CB-14 SL indicates 110
VAC operation; model numbers with an H suffix indicates 208 to 240 VAC operation (e.g. CB-16SLH
for 220 VAC operation).
It is recommended that a separate electrical circuit servicing
only the Cool Boss be provided.
If your Cool Boss is equipped with a plug not compatible with your current power source, you must
contact a licensed, certified Electrician. The Electrician will install a separate 15 Amp circuit protected
by a fuse or circuit breaker with an appropriately grounded power receptacle in accordance with all
national and local electrical codes. Use an outlet that cannot be turned off by a switch.
No Electrician is required to connect the Cool Boss with a 110 VAC power source as shipped from the
factory. Units operating at 110 VAC have the appropriate plug attached. Only units requiring 220 VAC
operation require an electrician to install the required 220 VAC plug.
⚠DANGER All electrical work must be accomplished by a licensed, certified Electrician ,
in accordance with national and local electrical codes. If you do not use a licensed,
certified Electrician, you void your warranty and put everyone who uses the cooler
in danger of injury or, in rare cases, death.
To connect the Cooler to a 220 VAC power source:
Verify the Cool Boss is disconnected from the power source.
If it is connected, disconnect it. Do not begin to install a 220 VAC plug until you are
sure that power has been disconnected from the unit.
Verify the Cooler is configured for 220 VAC operation. Locate the Model/Serial Number plate near
the Cooler Display. The operating voltage is indicated on this data plate and should indicate 208 –
230 VAC operation. If this data plate indicates 110 VAC, then the unit cannot be run on 220 VAC.
Have a licensed, certified Electrician attach a 250 VAC NEMA 30A, 2-Pole, 3-Wire plug.
This Plug is not shipped with the Cool Boss. You must have the Electrician bring the correct plug.
The colors of the three exposed wires from the power cord are Brown, Blue, and Green/Yellow,
the European color code.
Important: To connect the three exposed wires to an appropriate Plug or to hard-wire them,
have your Electrician follow the electrical codes for the country and locality in which
you are using the unit.
For example, if you are using the unit for 220V in the United States, the color codes of the power
cord wiring on the Cooler correspond to:
Brown: Live
Blue: Live
Green/Yellow: Ground
If you were using the unit in a European
country, the color codes on the wiring that
comes with the Cooler correspond to:
Brown: Live
Blue: Neutral
Green/Yellow: Ground