WaterLogic WL400 Series User manual

Waterlogic Commercial Products, LLC
11710 Stonegate Circle
Omaha, NE 68164
[phone] www.waterlogicdealers.com
Tech Portal Website: techportal.waterlogic.com
Waterlogic International, LTD –Global Headquarters Grenfell Road, Maidenhead, Berkshire, SL6 1HN,
United Kingdom
WL400
MANUAL

WL400 Manual Page 2 –Revision: 10-23-2019
WL400 MANUAL
Congratulations on your choice of the Waterlogic WL400 water treatment system. The WL400
model dispenses cold, and hot. Every WL400 includes:
High Performance Multi-Stage Filtration
Bio-Cote Anti-Microbial Protection
Firewall™Advanced Purification
The Waterlogic WL400 Water Treatment System provides exceptional quality and great tasting
water with every use.
INTRODUCTION
Carefully read and follow all instructions to ensure proper and efficient operation of your W400
Water Treatment System. Contact Waterlogic or an Authorized Waterlogic Dealer if you have any
questions.
Waterlogic and Authorized Waterlogic Dealers employ trained service personnel who are
experienced in the installation, function and repair of Waterlogic equipment. This publication is
written for use by these qualified individuals. Waterlogic encourages users to learn about products,
however, we believe that product knowledge and service is best obtained by consulting Waterlogic
or an Authorized Waterlogic Dealer.
Waterlogic Water Treatment Systems should be combined with selected water treatment
components to create a system specifically tailored for each application by trained and qualified
personnel.
Products manufactured and marketed by Waterlogic and its affiliates are protected by patents
issued or pending in the United States and other countries.
Waterlogic reserves the right to change the specifications referred to in this literature at any time,
without prior notice. Changes or modifications not expressly approved by Waterlogic could void the
warranty and user’s authority to operate the equipment.
The Waterlogic WL400 provides exceptional quality and great tasting water with every use.

WL400 Manual Page 3 –Revision: 10-23-2019
TABLE OF CONTENTS
USER GUIDE
•Safety Alert Symbols .........................................................................4
•Safety Precautions.............................................................................4
•Features and Benefits .......................................................................6
•Certifications .....................................................................................7
•Model Designations and General Specifications...............................8
•Electrical and Shipping Specifications...............................................9
•Operating Instructions ....................................................................10
•Warranty ........................................................................................12
SERVICE GUIDE
•Service Requirements .....................................................................13
•Hot Tank Principles of Operation....................................................14
•Resetting the Hot Tank Overload (High Limit Safety) .....................15
•Hot Tank Descaling..........................................................................16
•Increasing Faucet Flow....................................................................18
•Display Panels and Icons .................................................................19
•Disabling Sleep Mode......................................................................20
•Programming...................................................................................21
•Opening Top Cover..........................................................................23
•Replacement Components (Consumables).....................................24
•Countertop Drawing and Parts List……………………...........................25
•Base Drawing and Parts List……………………......................................34
•Flow Diagram ..................................................................................39
•Electrical Schematic ........................................................................40
REVERSE OSMOSIS GUIDE
•RO Quick Guide Overview...............................................................41
•Base Cabinet Side Removal.............................................................42
•Base Cabinet Configuration.............................................................43
•RO Setup and Filter Change ............................................................44
•Inside Left Side Cabinet Configuration ...........................................45
•Inside Right Side Cabinet Configuration .........................................46
•Replacing RO Membrane ................................................................47
INSTALLATION GUIDE
•Pre-Installation Procedures.............................................................49
•Draining Procedure .........................................................................55
•Base Cabinet Assembly ...................................................................57
•Installation Instructions ..................................................................60
TROUBLESHOOTING GUIDE
•Fault Codes......................................................................................63
•Power Troubleshooting...................................................................65
•Dispense Troubleshooting...............................................................68
•Cold Water Troubleshooting...........................................................79
•Hot Water Troubleshooting ............................................................80

WL400 Manual Page 4 –Revision: 10-23-2019
SAFETY ALERT SYMBOLS
Read and follow all safety information carefully. The signal words used in this manual are selected as
shown below and based on an assessment of the degree of potential injury or damage (severe or
minor) and the occurrence of injury (definitely occurs or has the potential to occur) when the
warning is ignored:
DANGER!
Indicates a situation which, when not avoided, results in death or severe injury.
WARNING!
Indicates a situation which, when not avoided, has the potential to result in death or severe
injury; and/or severe property damage.
CAUTION!
Indicates a situation which, when not avoided, results or has the potential to result in minor
injury; and/or minor property damage.
SAFETY PRECAUTIONS
Basic safety precautions should be followed, including the following:
Ensure all local, state, and federal laws and codes including health and safety guidelines are met
when installing Waterlogic Equipment. Only qualified service technicians should attempt
installation and service of Waterlogic Equipment. Always read the entire operating instructions
before using the appliance and save these instructions for future use.
DANGER! ELECTRICAL SHOCK HAZARD. Always use a dedicated and properly grounded outlet.
Unit should be protected by ground-fault circuit interrupter (GFCI) or residual current device (RCD)
having a rated residual operating current not exceeding 30mA. Use only Waterlogic supplied
power cord. Never use extension cords or power strips to connect unit. Do not use if the power
supply cord is damaged. Always unplug from power supply prior to servicing.
WARNING! AUTHORIZED USE ONLY. This appliance is to be used for its intended purpose as
described in this manual and untrained individuals who use this manual assume the risk of any
resulting property damage or personal injury. This appliance can’t be used by children and persons
with reduced physical, sensory or mental capabilities or lack of experience.
WARNING! DO NOT OPERATE IF DAMAGED. Unplug if abnormal case occurs. Contact Waterlogic
or authorized dealer for repair, service, and installation to avoid hazards.
WARNING! HOT WATER. Unit produces Hot Water in excess of 87°C (188°F). Water above 52°C
(125°F) can cause severe burns or scalding. Keep unauthorized people and children away from the
unit to avoid accidental dispensing of hot water.

WL400 Manual Page 5 –Revision: 10-23-2019
WARNING! CONNECT TO POTABLE WATER SUPPLY. This system is to be used for water only and is
not intended for use where water is microbiologically unsafe or with water of unknown quality
without adequate disinfection before or after the system.
WARNING! TIP HAZARD. Dispenser could tip or fall causing serious injury. Always install unit on
a firm, flat, and level surface and secure the WL400 Water Treatment System to the base cabinet
with the screw provided to lock the components together. Secure unit to cabinet, wall, or floor if
needed. Never place heavy items on top of unit and never climb, stand, or hang on unit or storage
cabinet to prevent injury and damage.
WARNING! UNIT IS HEAVY. TWO PERSON LIFT REQUIRED. Transport unit empty and always use
material handling equipment or two people with proper lifting technique to reduce injury risk.
WARNING! STORE AND TRANSPORT UNIT EMPTY. ALWAYS SANITIZE BEFORE USE.
The unit must be completely drained and sealed before storing to avoid stagnation and reduce
microbiological contamination (potential bacterial growth). Sanitize before use to eliminate any
potential microbiological contaminates.
CAUTION! INDOOR USE ONLY. Intended for household use only. Never expose to direct sunlight,
heat sources, or ambient air temperature above 37°C (100°F) or below 2°C (35°F). Install indoors
and keep unit away from excessive humidity. Never expose to freezing temperatures. Ensure
there is adequate clearance around the unit to allow refrigeration system condenser to dissipate
heat. Warmer environments require more clearance around the unit. Minimum clearance around
all surfaces of the machine is 2-inches. Installs where the ambient temperature exceeds 27°C
(80°F), require a minimum of 4-inches clearance for proper heat dissipation and efficient
operation.
CAUTION! USE A WATER PRESSURE REGULATOR. Waterlogic will not be responsible for injury or
damage caused by excessive water pressure. Input or feed pressure must be 40 psi to 60 psi. Be
aware of any potential pressure surges caused by building/municipal pumping stations.
CAUTION! USE UV STABILIZED SUPPLY LINES. Feed the unit with a potable ambient or cold
water supply only. Feed water over 37°C (100°F) can damage the treatment components. Water
block devices and external leak detectors are strongly recommended. Locate the unit as close to
the water supply and the electrical connections as possible. Locate the unit as close to the water
supply and the electrical connections as possible. Immediately isolate or close water supply valve
and contact service representative if leak is noticed.
Contact Waterlogic for assistance or help finding an Authorized Service Representative.

WL400 Manual Page 6 –Revision: 10-23-2019
WL400 FEATURES AND BENEFITS
Ambient, Cold, Hot, and Extra Hot Water
Pressure Fed Ambient, Cold, Hot, and Extra Hot Selections to meet a wide range of customer
demands. Cold water temperature is adjustable.
High Volume Storage and Water Capacity
The WL400 Water Treatment System has 4 liters (1 Gallon) of Cold Water Capacity and 1.2 Liters (.3
Gallons) of Hot Water Capacity.
Firewall™
Firewall™ is proprietary technology that places the UV lamp at the point of
dispense. This point of dispense purification keeps the dispense nozzle free from
external contamination as well as purifying the water, making the freshest water
possible.
BioCote®Anti-Microbial Protection
Certain plastic, silicon, and painted surfaces surrounding the dispensing areas and drip
try are infused with an exclusive additive called BioCote®. BioCote® provides an
effective barrier against microbes like bacteria and mold, which may cause odors or
staining.
Large Dispense Area with Recessed Faucet
9.5 inch dispense height with BioCote® recessed faucet to protect from cross-contamination.
Leak Detection
WL400 Water Treatment Systems are supplied with a Sensor in the Leak Tray that halts water supply
to prevent overflow and sounds alarm to reduce accident potential.
Energy Saving Sleep Mode
Energy Saving Sleep Mode can be programmed to turn off heater after 3, 6 or 12 hours of inactivity
and can be shut off.

WL400 Manual Page 7 –Revision: 10-23-2019
WL400 CERTIFICATIONS
Waterlogic Water Treatment Systems have been tested, approved, and certified by the world’s top
standards bodies such as NSF and ANSI. These organizations set and regulate national standards. We
believe that performance testing and certifications validate Waterlogic as a world-leader in water
treatment systems.
WL400 Water Treatment System Certifications Include
UL399 –Certified Drinking Water Cooler
Intertek Labs (ETL) Certified the WL400 Water Treatment System to ANSI/UL 399 Standard
for Drinking Water Coolers.
CSA C22.2 No. 120 CSA Standard for Refrigeration
BPA Free - Waterlogic tests for BPA and declares that all of its products are Bisphenol-A FREE
and contain no harmful BPA plastics.
NSF/ANSI-55 Class A –Ultraviolet Microbiological Water Treatment Systems
Water Quality Association is an international standards organization. Firewall™ Technology
contains our latest, most innovative and patented breakthrough, “The Firewall™”, the most
comprehensive UV purification system for point-of-use water treatment systems ever
developed. The Waterlogic Firewall™components has been tested and certified by the Water
Quality Association (WQA) to NSF/ANSI-55 Class A –Ultraviolet Microbiological Water
Treatment Systems, and to NSF/P231 and the USEPA Standard for Microbiological Water
Purifiers.
NSF P231 –Protocol for Microbiological Purifiers
The Public Health and Safety Organization establishes minimum requirements for health and
sanitation characteristics of microbiological water purifiers. The requirements are based on
the recommendations of the U.S. Environmental Protection Agency's Task Force Report.
NSF/ANSI-42 –Chlorine, Taste and Odor Reduction
NSF/ANSI-53 –Lead and Cyst Reduction
The Public Health and Safety Organization establishes minimum requirements for materials,
design, construction, and performance of drinking water treatment units that are designed to
reduce specific aesthetic-related contaminants in public or private water supplies.
Energy Star Certified
The WL400 Water Treatment Systems, have been tested and certified to the Energy Star,
a US Environmental Protection Agency (EPA) program that helps our customers save
money and protect our climate through superior energy efficiency.
Waterlogic is certified to ISO 9001:2015 –Quality Management Systems (certified
by Intertek). ISO 9001 is the internationally accepted standard for well managed
organizations that have adopted the key quality management principles to its
operations to bring consistent quality products and a culture of continuous improvement.
Safe Drinking Water Act
Waterlogic water treatment systems conform to the Safe Drinking Water Act (SWDA) “lead-free”
amendment effective January 4, 2014.

WL400 Manual Page 8 –Revision: 10-23-2019
MODEL/PART DESIGNATIONS
BRAND NAME
DESCRIPTION
MODEL –PART NUMBER
WL400 Counter Top
Waterlogic WL400 Counter Top -
Ambient, Cold, Hot and Extra Hot
10-WL4FW-SB
F-4FW-M-HCA-HC2P-SB-INN
Serial Number Prefix: 96
WL400 Base Cabinet
Waterlogic WL400 Base Cabinet with RO
10-WL4BC
F-4FW-M-HCA-HC2P-SB-INN
SPECIFICATIONS
ITEM
Water Connection
¼” Quick Connect
Cold Water Temperature
Cold Water Temperature –Factory Set Point 5°C (41°F)
Adjustable from 3° - 12.2°C (37° - 54°F.)
Cold Tank Capacity
4 Liters (1 Gallon)
Hot Water Temperature
Hot Water Temperature –Factory Set Point 85°C (185°F)
Adjustable from 70° - 95°C (158°F - 203°F)
Extra Water Temperature
Extra Hot Water Temperature –Factory Set Point 95°C (203° F)
Hot Tank Capacity
1.2 Liters (0.3 Gallons)
Hot Water Manual Reset
Overloads
97°C (207° F)
Recommended Service
Pressure
40-60 psi (275-414 kPa) –Use Pressure Regulator
Maximum Service Pressure
100 psi (689 kPa) –Use Pressure Regulator
Rated Service Flow
378.5 Liters per Day (Lpd) / 100 Gallons per Day (Gpd)
Environmental Temperature
1.67° - 38°C (35° - 100°F)
UV Lamp
13 Watts
Heater
500 Watts
Refrigerant Gas
R134a, 75g, 2.65 ounces
R134a Pressures
High (230 psi), Low (90 psi)

WL400 Manual Page 9 –Revision: 10-23-2019
SHIPPING SPECIFICATIONS
ITEM
WL400 Counter Top
WL400 Base
WL400 Tower Combined
Width/Depth/Height
42cm x 44.5cm x 44.5cm
(16.5” x 17.5” x 17.5”)
42 cm x 44.5cm x 80cm
(16.5” x 17.5” x 31.5”)
42 cm x 44.5cm x 125cm
(16.5” x 17.5” x 49”)
Weight (dry) of Box
26 kg (57 pounds)
28 kg (61 pounds)
53.5 kg (118 pounds)
Ship per Pallet
Up to 8 per pallet
4 per pallet in 2 boxes
*WL400 Counter Top is 17.75 in. tall and may not fit between countertops and cabinets - Check installation to ensure adequate clearance.
ELECTRICAL SPECIFICATIONS
ELECTRICAL SUPPLY
120V/60Hz
15 Amp Service+
COMPONENT
POWER (approximate)
AMP DRAW (approximate)
Heater
500
4.2 Amps
Compressor
114
1 Amp
Fan
16
0.1 Amps
Controls
15
0.1 Amps
UV Lamp System
13
0.1 Amps
Pump
12
0.1 Amps
WL400 TOTAL
670
5.6 Amps
Base Cabinet Height 31-3/4”
Width 16-1/2”
Height to Top of Drip Tray 34”
Depth 18-1/2”
Overall Height 49”
Height to Dispense Faucet 43-3/4”
Counter Top Height 17-3/4”

WL400 Manual Page 10 –Revision: 10-23-2019
OPERATING INSTRUCTIONS
The above picture shows front dispensing panel for the Waterlogic WL400 Water Treatment System.
Button
Operational Use
COLD WATER: Press the Cold-Water selection button. There may be a 2
second delay as Firewall™ UV lamp purifies the water and the Firewall™.
Sensor ensures your safety. Blue light will illuminate the dispense area.
AMBIENT WATER: Press the Room Temperature (Ambient) Water
selection button. There may be a 2 second delay as Firewall™ UV lamp
purifies the water and the Firewall™ Sensor ensures your safety. Green
light will illuminate the dispense area.
HOT: Press and hold both the Hot Water 185°F (85°C) and the Extra Hot
Water selection buttons simultaneously for 2 seconds and hot water will
dispense. This is a child safety feature. Red light will illuminate the
dispense area.
EXTRA HOT: Press the Extra Hot Water Selection button to elevate the
hot tank to 203°F (95°C). Allow a few minutes for the temperature to rise
in the hot tank.
Press and hold both the Hot Water and the Extra Hot Water selection
buttons simultaneously for 2 seconds and hot water will dispense. This is
a child safety feature. Red light will illuminate the dispense area.
WARNING! Unit produces Very Hot Water up to 203°F (95°C). Water
above 125°F (52°C) can cause severe burns or scalding. Keep
unauthorized people and children away from the unit to avoid
accidental dispensing of hot water. Children should not use without
supervision.

WL400 Manual Page 11 –Revision: 10-23-2019
Dispensing your choice of water is very simple.
1. Place your cup centrally in the dispensing area. Always use a cup suitable for use with hot
water. Never hold cup or place hands in dispensing area while dispensing hot water. Never
try to fill more than one cup at a time.
2. Select the type of water you wish to be dispensed by press/touching the Cold, Ambient or Hot
water select icon until it illuminates.
WARNING! Unit produces Very Hot Water up to 95°C (203°F). Water above 52°C (125°F) can
cause severe burns or scalding. Keep unauthorized people and children away from the unit to
avoid accidental dispensing of hot water. Children should not use without supervision.

WL400 Manual Page 12 –Revision: 10-23-2019
WATERLOGIC MANUFACTURED WATER TREATMENT SYSTEM LIMITED WARRANTY
UNITED STATES AND CANADA ONLY
Waterlogic water treatment systems are guaranteed to the original purchaser to be free of defects in
materials and workmanship for a period of three (3) years from the date of purchase, but in no event
longer than forty-eight (48) months from the date of manufacture. Waterlogic Commercial Products,
LLC (“Waterlogic”) based in the U.S.A. and its affiliated companies are not liable for any cost of
removal, installation, transportation, or any other charges which may arise in connection with a
warranty claim.
This warranty does not cover damage or wear to products caused by abnormal operating conditions,
accident, abuse, misuse, unauthorized or improper alteration or repair, damage caused by or
resulting from shipping or accident, damage caused by hot water, freezing, flood, fire, or acts of God.
The effects from chlorine corrosion, scaling and normal wear are specifically excluded from this
warranty. This warranty does not cover products used outside the countries where the unit was
purchased, and does not cover products that were not installed in accordance with Waterlogic printed
installation and operating instructions obtained in training or from www.waterlogic.us. Failure to
follow all instructions for operation and maintenance voids the warranty. This warranty is not
transferable.
To obtain warranty repairs or replacement, you must obtain a Return Authorization from Waterlogic.
To obtain a Return Authorization, you must submit a Return Authorization form with supporting
documentation to Waterlogic for evaluation. The form is available at www.waterlogic.us. Supporting
documentation must include, but is not limited to; proof of purchase, installation date, failure date,
and supporting installation and maintenance data. After you submit a Return Authorization form and
supporting documentation, Waterlogic will determine whether a reasonably apparent defect in
materials or workmanship covered by this limited warranty exists. If Waterlogic determines the
claimed defect is covered by this warranty, Waterlogic will, at its sole discretion, determine whether
to correct the defect or replace the unit, free of charge to you. If Waterlogic determines that the unit
should be returned for warranty service, Waterlogic will approve of return in writing and will issue a
Return Authorization which you must obtain prior to shipping the product. You are responsible for the
cost of freight in to Waterlogic.
Waterlogic and its affiliated companies hereby limit the duration of any and all implied warranties to
a maximum period of three (3) years from the date of purchase including, but not limited to, the
implied warranties of merchantability and fitness for a particular purpose. Some states do not allow
limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Consequential and incidental damages are not recoverable under this warranty. Some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may vary from
state to state.
New Warranty Policy issued by Waterlogic Commercial Products LLC, USA - January 10, 2014
Waterlogic Commercials Products LLC Tel: [phone]
11710 Stonegate Circle Website: waterlogic.us
Omaha, NE 68164

WL400 Manual Page 13 –Revision: 10-23-2019
SERVICE REQUIREMENTS
WARNING! Read and understand the contents of this manual before attempting to service
WL400. Failure to follow the instructions in this manual could result in death, serious
personal injury, or severe property damage. Only trained and qualified technicians should
attempt to install, maintain, or service Waterlogic Equipment.
1. Visually inspect all electrical and water connections for signs of wear or damage.
DANGER! HIGH VOLTAGE ELECTRICAL HAZARD. Unplug before inspection and service.
2. Waterlogic recommends changing the UV Lamp Assembly and Wiring Harness must be replaced
every 6 months.
WARNING! ULTRAVIOLET RADIATION. Protect your skin and eyes against ultraviolet rays.
Never look directly at an operating UV light. Disconnect before removing UV Lamp.
CAUTION! UV LAMPS ARE HAZARDOUS. Lamps are considered Hazardous Waste and must
be disposed of accordingly. Refer to Product MSDS sheet for details.
3. Clean the Quartz Sleeve that surrounds the UV lamp with a non-abrasive cloth, descaling solution,
or ultrasonic bath if needed when changing UV Lamps.
CAUTION! UV SYSTEM IS FRAGILE. Never handle the UV lamp or Quartz Sleeve with bare
hands. UV Lamp and quartz sleeve must be free of oils and contaminants to ensure proper
operation. Use a soft non-abrasive cloth to clean.
4. Inspect the Quartz Sleeve O-ring for wear or damage and replace as necessary.
5. Ensure there is adequate (minimum of 2”) clearance around the unit and clean the condenser grill
and compressor fan to provide efficient cooling system operation.
6. Sanitize the Cold Tank per instructions in the Pre-Installation procedures.
7. Clean and sanitize external surfaces of the unit. Use soap and water or chemicals that are
compatible with ABS plastic and will not damage or degrade the product surfaces.
8. Remove and clean the Faucet. Replace as needed.
WARNING! SANITIZER MAY CONTAIN HAZARDOUS CHEMICALS. Use of proper personal
protective equipment such as rubber gloves and eye protection is required.
13UV Lamp Assembly
Part Number CT-2090-C WLCP Part Number 10-8075

WL400 Manual Page 14 –Revision: 10-23-2019
HOT TANK PRINCIPLES OF OPERATION
All Waterlogic Hot Tanks have a built in Vent or
Expansion Chamber in the top of the tank except for
WL270 (GF) units.
The Vent Chamber allows for expansion of the water
when it is heated.
The chambers are separated by a welded-in tank
baffle.
Water always flows into the bottom of the tank and
out the top to the faucet.
The hot tank outlet tube has a restrictor in its base.
This ensures the reservoir is always full by allowing
more water in than out.
There is a small hole in the side of the tank outlet tube
that allows air and water to pass into the vent
chamber as it is heated.
Water in the vent chamber is suctioned back through
the outlet tube vent hole when water is dispensed.
Expansion of water as it is heated in the reservoir will
push the water out the faucet when the outlet tube
vent hole becomes plugged with debris or scale.
The small Outlet Vent Hole is susceptible to scale build
up and is a key indicator that descaling is required.
It is critical to descale the hot tank through the vent
line and outlet line on a regular basis to prevent this
problem.
Descaling through the inlet and/or outlet lines only
will not clean the vent chamber and outlet vent hole
properly.

WL400 Manual Page 15 –Revision: 10-23-2019
RESETTING THE HOT TANK OVERLOADS - HIGH LIMIT SAFETY
1.
Turn off Green Heater/Compressor Switch on rear of unit. O=OFF
2.
Unplug the Power Cord from rear of unit.
3.
Remove the Tower Cover Locking Screws and Slide
Locks towards outside of unit to unlock both locks.
4.
Slide Top Cover forward and lift in front of Top Cover to open.
5.
Remove the 2 Phillips Screws from Left Side Panel (when standing
behind unit) and remove side panel.
6.
Check and press both Thermal Overload buttons on Hot Tank.
7.
Close, lock and replace Top Cover Screws
8.
Turn on Red Power Switch and Green Heater / Compressor
Switch. I=ON
Remove Two Screws
Slide Locks Open

WL400 Manual Page 16 –Revision: 10-23-2019
HOT TANK DESCALING INSTRUCTIONS
The hot tank requires removal of mineral deposits (descaling) on a regular basis. Typically
descaling should take place every 6 to 12 months to preserve the long-term health of your unit.
Use non-toxic cleaner such as ScaleKleen, DEZCAL, 20% Citric Acid Solution, or Undiluted Vinegar
Solution to remove mineral deposits as directed by the manufacturer depending upon filtration
and local water conditions.
Descaling is an important process that removes calcium deposits, or scale, that can build up
inside a tank over time. Calcium and scale is non-toxic but left unattended will hinder your unit’s
performance.
WARNING! PERSONAL PROTECTIVE EQUIPMENT REQUIRED. Always ensure proper
ventilation and use rubber or nitrile gloves and eye protection when using chemicals. Refer to
Material Safety Data Sheet for specific requirements of each product.
CAUTION! STAINLESS STEEL TANK DESCALING.
The hot tank is made from stainless steel. Ensure descaling solution is compatible with stainless
and always flush the unit completely. Dispose in an environmentally safe manner.
Materials Needed:
•Personal Protective Equipment. Rubber or Nitrile Safety Gloves and Protective Eyewear
•Phillips Screwdriver
•Temperature Gauge
•Water Pitcher or Container to collect water from the faucet
•5-gallon container or drain basin
•Citric Acid Based Cleaner
•¼” Plastic Tubing, at least 4 feet in length, and assorted ¼” quick connect fittings
•Sanitizing Cartridge
•Food Coloring
1. Put descaler per directions and 3 drops of food coloring into the descaling cartridge.
2. Connect descaling cartridge to the inlet water supply and connect to inlet bulkhead fitting on the
back of the unit. Turn on Water Supply.
3. Select Hot Water and depress the Main Dispensing Button on the Front Control Panel until
descaling solution (colored water) comes out of the faucet. Container and drain basin will be
required to catch water from the faucet.
4. Turn off water supply and remove sanitizing cartridge from inlet water supply. Reconnect water
supply to inlet fitting.

WL400 Manual Page 17 –Revision: 10-23-2019
5. Allow descaling solution to remain in the Hot Tank for 15 minutes (length of time may vary
depending on water conditions).
6. Place a pitcher, catch basin or other container under the faucet of the WL400 Water Treatment
System.
7. Flush the Hot Tank until water runs clear.
8. Once clear water dispenses from the faucet the Hot Tank has been descaled. Always ensure unit
is performing to the customer’s satisfaction.
WARNING! HOT WATER HAZARD. WL400 Water Treatment System produces VERY HOT
WATER up to 95°C (203°F). Water above 52°C (125°F) can cause severe burns or scalding. Hot
water should be dispensed carefully into insulated container to avoid injury.
CAUTION!MUST REPLACE HOT TANK 3-5 YEARS DEPENDING ON USAGE. The hot tank and
its controls must be replaced a minimum of every five years to ensure efficient and dependable
operation.
WARNING! REINSTALL ALL PANELS AND COVERS. Always reinstall all panels, protective
covers, and fasteners after servicing equipment. Failure to do so could result in severe personal
injury and will void the certifications and warranty of the equipment.

WL400 Manual Page 18 –Revision: 10-23-2019
INCREASING FAUCET FLOW
To increase flow from the WL400, you may turn up the RO pressure switch to 60 psi by removing the
right lower panel of the base cabinet to access the switch. Turn adjusting screw in (clock wise) 6
turns or until output pressure is 60 psi, verify with pressure gauge.

WL400 Manual Page 19 –Revision: 10-23-2019
DISPLAY PANELS AND ICONS
UV Lamp Has Failed
See troubleshooting
section of manual
The UV Lamp is
operating
Sleep Mode -
press any
button to
bring machine
out of sleep
mode
The Hot Tank is heating up
A leak has been
detected - See
troubleshooting
section of manual
Filter needs replacing
The Cold Tank is
Chilling
Extra hot water has been
selected
The Drip Tray is
Full –Please
empty the tray

WL400 Manual Page 20 –Revision: 10-23-2019
DISABLING SLEEP MODE
Sleep Mode - press any button to bring machine out of Sleep Mode.