WaterLogic WL2FW FIREWALL Series User manual

WL2FW FIREWALL
MANUAL
Waterlogic Trading LTD,
WLI Trading Limited, Second Floor, Suite 4, Beacon Court, Sandyford, Co. Dublin, Ireland
Tel: + 353 (0) 1293 1960
Fax: + 353 (0) 1293 1052
For Technical Support Email: [e-mail]
WLI (UK) LTD – Global Headquarters Grenfell Road, Maidenhead, Berkshire, SL6 1HN, United Kingdom

WL2FW MANUAL
WL2 FW Manual
Page 2 – Revision EU05-07-17
Congratulations on your choice of the Waterlogic WL2FW Water Treatment System. The WL2FW
Water Treatment System model dispenses cold, and hot. Every WL2FW Water Treatment System
includes:
High Performance Multi-Stage Filtration
Bio-Cote Anti-Microbial Protection
Firewall Advanced Purification
The Waterlogic WL2FW 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 Water
Purification 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 Purification 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.
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.
Waterlogic technical manuals cover voltages of both 120v and 220v for all our markets. Please
ensure that you carefully read the information in this manual and for any parts specific to any
market, refer to your technical agreement or specific part listing.

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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
SERVICE GUIDE
•Service Requirements.......................................................... 11
•Installation Rail.................................................................... 12
•Hot Tank Principles of Operation ......................................... 13
•Heater Circuit – Hot Tank Wiring ......................................... 14
•Resetting the Hot Tank Overheat (High Limit Safety) ........... 15
•Hot Tank Descaling .............................................................. 17
•Programming – Disabling Energy Saving Sleep Mode........... 19
•Programming – Changing from Hot Tank Thermostat to
Thermistor........................................................................... 20
•Programming – Changing Hot Water Mode to Ambient....... 21
•Recommended Spares Holding ............................................ 22
•Mini Drawings and Parts List................................................ 23
•Free standing Drawings and Parts List ................................. 29
•Flow Diagrams..................................................................... 35
•Electrical Schematic............................................................. 38
INSTALLATION GUIDE
•Pre-delivery Procedures ...................................................... 43
•Mini Draining Procedure...................................................... 47
•Free standing Draining Procedure........................................ 48
•Installation Instructions ....................................................... 49
TROUBLESHOOTING GUIDE
•Fault Codes.......................................................................... 51
•Power Troubleshooting ....................................................... 54
•Dispense Troubleshooting ................................................... 57
•Cold Water Troubleshooting................................................ 72
•Hot Water Troubleshooting ................................................. 73

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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 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 usingthe appliance
and save these instructions for future use.
DANGER! ELECTRICAL SHOCK HAZARD. Always use a dedicated and properly earthed outlet. Unit
should be protected by 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 be used by children aged from 8
years and above and persons with reduced physical, sensory or mental capabilities or lack of
experience and knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazardsinvolved.
WARNING! SUPERVISE CHILDREN. Keep appliance and cord out of reach of children under the
age of 8years. Children under the age of 8 years must not use or play with theappliance.
WARNING! DO NOT OPERATE IF DAMAGED. Unplug for safety. Contact Waterlogic orauthorized
dealer for repair, service, and installation to avoid hazards.
WARNING! HOT WATER. Unit produces Hot Water in excess of 87oC (188oF). Water above 52oC
(125oF) can cause severe burns or scalding. Keep unauthorized people and children away from the
unit to avoid accidental dispensing of hot water.

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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. System is designed for the supplemental bactericidal treatment of
public drinking water, or other drinking water, which has been tested and deemed acceptable for
human consumption by the water provider. The system is designed to reduce normally occurring
non-pathogenic or nuisance microorganisms only. System is not intended for treatment of
contaminated water.
WARNING! TIP HAZARD. Dispenser could tip or fall causing serious injury. Always install unit on a
firm, flat, and level surface and secure the WL2FW 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 (50mm minimum) to allow refrigeration system
condenser to dissipate heat. Warmer environments require more clearance around theunit.
Installs where the ambient temperature exceeds 27°C (80°F), require a minimum of 100mm
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 2.7Bar to 4Bar (2.7to
4bar). Be aware of any potential pressure surges caused by building/municipal pumping stations.
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 to minimize risk.
CAUTION! USE PROPER SUPPLY LINES AND FEED WITH POTABLE AMBIENT WATER ONLY.
Feed water over 37°C (100°F) may damage the treatment components. Always use supply lines
with adequate pressure rating and UV resistance. Close water supply valve and contact service
representative if a leak is noticed.
Contact Waterlogic for assistance or help finding an Authorized Service Representative.

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WL2FW FEATURES AND BENEFITS
Ambient, Cold and Hot Water
Cold and Hot Selections, which can be changed to Ambient and Cold settings to meet a wide range of
customer demands.
High Volume Storage and Water Capacity
Free standing model has 4 Litres of Cold Water Capacity and 1.5 litres of Hot Water.
Mini model has 2 Litres of Cold Water Capacity and 1.5 litres of Hot Water.
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 mould, which may cause
odours or staining.
Large Dispense Area with Recessed Faucet
200mm dispense height with BioCote® recessed faucet to protect from cross-contamination.
Child Safeguard
WL2FW Water Treatment Systems requires Hot Water selection followed by main dispense for Hot
Water, and defaults back to cold selection after 3 seconds of inactivity to prevent accidental
dispensing of hot water.
Energy Saving Sleep Mode
Energy Saving Sleep Mode can be programmed to turn off heater after 3 hours of inactivity.
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.

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WL2FW 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.
WL2FW Water Treatment System Certifications Include
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 Odour 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.
UL399 – Certified Drinking Water Cooler
Intertek Labs (ETL) Certified the WL2FW Water Treatment System to ANSI/UL 399 Standard for
Drinking Water Coolers.
BPA Free - Waterlogic tests for BPA and declares that all of its products are Bisphenol-A FREE
and contain no harmful BPA plastics.
Energy Star Certified
The WL2FW 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 9001:2008 – 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.

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MODEL/PART DESIGNATIONS
BRAND NAME DESCRIPTION MODEL – PART NUMBER
WL2FW Free Standing
Waterlogic WL2FW Free Standing - Cold and Hot
F-2FW-FS-HC
WL 2FW FS
Waterlogic WL2FW Free Standing - Cold and
Ambient F-2FW-FS-CA
Waterlogic WL2FW Free Standing – Cold
F-2FW-FS-C
WL2FW Mini
Waterlogic WL2FW Mini - Cold and Hot
F-2FW-M-HC
WL 2FW M
Waterlogic WL2FW Mini - Cold and Ambient
F-2FW-M-CA
Waterlogic WL2FW Mini - Cold
F-2FW-M-C
SPECIFICATIONS
ITEM WL2FL Mini WL2FL Free Standing
Power Supply 220V/50Hz or 120V/60Hz
Water Connection ¼” Quick Connect
Cold Water Temperature Cold Water Temperature – Factory Set Point 5°C (41°F)
Cold Tank Size Mini - 2 Litres
Free standing – 4 Litres
Hot Water Temperature 87°C (187°F)
Hot Tank Size 1.5 litres
Hot Water Manual Reset
Overheat
105°C (221°F)
Recommended Incoming
Feed Pressure
2.7Bar – 4Bar – Use Pressure Regulator
Maximum Service Pressure 6.5Bar (100 psi) – Use Pressure Regulator
Rated Service Flow Out 1.89 Litres per Minute – Firewall Purification
Environmental Temperature 2°- 37°C (35°- 100°F)
UV Lamp 15 Watts 15 Watts
Heater 500 W
Refrigerant Gas R600a 20g R600a 20g

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SHIPPING SPECIFICATIONS
ITEM WL2FW Mini WL2FW Free Standing
Width/Depth/Height
34cm x 37cm x 45cm
13.5” x 14.5” x 17.75” *
34cm x 41cm x 104cm
13.5” x 14.5 x 41”
Weight (dry)
26.3 kg (58 pounds)
30 kg (66 pounds)
ELECTRICAL SPECIFICATIONS
ELECTRICAL SUPPLY
220V/50Hz or 120V/60Hz
13 Amp Service 220V/50Hz
15 Amp Service 120V/60Hz
COMPONENT
POWER (approximate)
AMP DRAW (approximate)
Heater
500 Watts
2.2 Amps
4.16 Amps
Compressor
100 Watts
0.45 Amps
0.83 Amps
UV Lamp System
15 Watts
0.06 Amps
0.125 Amps
WL2FL TOTAL
615 Watts
2.71 Amps
5.12 Amps

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OPERATING INSTRUCTIONS
The above picture shows front LCD display and control panel for the Waterlogic WL2FW.
For Cold Water: Press Cold Water Select Button followed by the Dispensing Button (within 3
seconds).
For Ambient Water: Press Ambient Water Select Button followed by the DispensingButton (within
3 seconds).
For Hot Water: Press Hot Water Select Button followed by the DispensingButton (within 3
seconds).
NOTE: Default selection mode is Cold Water. Selection will return to default after 3 seconds of
inactivity.
NOTE: Selection indication light will turn Red when the Hot Water Select button is pressed, and will
switch back to the default green within 3 seconds after dispensing the hot water.
Temperature Indicator Light

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SERVICE REQUIREMENTS
WARNING! Read and understand the contents of this manual before attempting to service
WL2FW Water Treatment System. 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 andservice.
2. Waterlogic recommends changing the UV Lamp every 6months.
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 fordetails.
3. Clean the Spiral Quartz Sleeve that surrounds the UV Lamp with a non-abrasive cloth, descaling
solution, or ultrasonic bath if needed when changing UVLamps.
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 ensureproper
operation. Use a soft non-abrasive cloth to clean.
4. Sanitize the Cold Tank per instructions in the pre-deliveryprocedures.
5. Clean and sanitize external surfaces of the unit. Sanitizing chemicals that are compatible with
ABS plastic and will not damage or degrade the product surfaces.
6. 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.

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INSTALLATION RAIL
WARNING! ALWAYS USE INSTALL RAIL. It is required to use an installation rail for the
installation of any Waterlogic Water Treatment System. Failure to use an installation rail can
result in damage due to excessive pressures over a prolonged period of time and no additional
leak protection. Please check local water bylaws, in some countries an installation rail is a legal
requirement.
CAUTION! ALWAYS INSTALL VERTICALLY. Do not install installation rail horizontally as this will
affect the performance of the water block.
Water inlet – 15mm compression fitting
Isolation valve – Quarter turn to isolate.
Double check valve – only allows water to flow one way, no adjustment
needed.
Pressure Reducing Valve – Reduces the pressure from any high pressure
down to 3bar +/- 0.5bar. The pressure reducing valve is an essential
part of the installation rail and ensures that the Waterlogic Water
Treatment System is not exposed to high pressures over a prolonged
period of time.
Water block – The water block will shut the flow of
water in the event that a leak has taken place. This
works by measuring the velocity of water and shutting
off water flow. Adjustment and reset can be made by
pressing or turning the red dial located on the front
face of the water block.
Adjustment Settings: 1.3 to 13.2 gallons(6-60Litres)
*Note Every notch increases the set volume by 1.5 +/- gallons
(5 +/- litres)
Pressure Requirements: 10 - 125 PSI (0.7 - 8.6 bar)
Ambient Temperature: 35 - 140°F (2 - 60°C)
Fluid Temperature: 35 - 158°F (2 - 70°C)
Flow Rate: 0.53 - 7.9 GPM (2 - 30 Lpm)
Resistance to Bursting: 725.19 PSI at 77˚F (>50 bar at 25˚C)
¾” to ¼” John Guest adaptor – Allows the connection of ¼” John Guest
PE pipework from the install rail to the bulkhead of the machine.
Open
Closed

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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
WL1000GF 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.
HOT TANK
HEATER
ELEMENT
THERMISTOR
WELL
OUTLET TUBE
INLET TUBE
EXPANSION
CHAMBER
EXPANSION SLIT

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HEATER CIRCUIT – HOT TANK WIRING

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RESETTING THE HOT TANK OVERHEAT OR HIGH LIMIT SAFETY
1. Red Compressor/Heater Switch must be in the O=OFF position
2. Unplug the Power Cord from rear of WL2FW Water Treatment System.
3.
Free Standing Model: Remove the Lower Front Panel by removing the Phillips Head
Screws underneath the Lower Front Panel.
Mini Model: Remove the Side Panel by removing Phillips Head Screws from Side Panel.
4.
Locate the Protective Metal Box on the rear of the hot
tank. As you look through the condenser coils on the
rear of the unit, you will see the hot tank located on the
right-hand side.
5.
From the front of the Water Treatment System, reach
up behind the hot tank and take hold of the protective
metal box covering the thermostat and overheat on the
hot tank.
There are nuts that secure the Protective Metal Box to
the Hot Tank, are loose enough to allow you toremove
the Protective Metal Box.
If the nuts on the metal box are too tight, loosen the
nuts securing the Hot Tank to the upper base of the
WL2FW Water Treatment System unit and lower the
Hot Tank so you can remove the Protective Metal Box.

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6.
For demonstrative purposes, photos below have lowered the hot tank from the unit.
Press the reset button
7.
Reattach the Protective Metal Box by depressing the top
flap of the Protective Metal Box so it snaps back into its
original position on the Hot Tank.
8. Replace the Lower Front Panel.
9. Plug in the Power Cord.
10.
Turn on the Red Compressor/Heater Switch I=ON position
The Hot and Cold tanks must be filled with water BEFORE turning on the
Red Heater and Compressor Switch.
11. Verify the cooler is fully operational before installing it at the customers’ site.

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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 or 20% Citric Acid 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 if left unattended will hinder your
unit’s performance.
WARNING! PERSONAL PROTECTIVE EQUIPMENT REQUIRED. Always ensureproper
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 ProtectiveEyewear
•Phillips Screwdriver
•Temperature Gauge
•Water Pitcher or Container to collect water from thefaucet
•20 Litre container or drain basin
•Citric Acid Based Cleaner
•¼” Plastic Tubing, at least 1m in length, and assorted ¼” quick connect fittings
•Empty Cartridge
1. Put descaler solution as per directions into the emptycartridge.
2. Connect descaling cartridge to the inlet water supply and connect to inlet bulkhead fitting on the
back of the WL2FW Water Treatment System. Turn on Water Supply.
3. Select Hot Water and depress the Main Dispensing Button on the Front Control Panel until
descaling solution (cloudy water) comes out of the faucet. Pinch the hot water overflow
tube to ensure sub tank is full of descale solution. Container and drain basin will be
required to catch water from the faucet.
4. Turn off water supply and remove the empty cartridge from inlet water supply. Reconnect water
supply to inlet fitting.
5. Allow descaling solution to remain in the Hot Tank for 15 minutes (length of time may vary
depending on water conditions).

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6. Place a pitcher, catch basin or other container under the faucet of the WL2FW Water Treatment
System.
7. Flush the Hot Tank until water runs clear. Ensure you pinch the hot water over flow tube to
drain and clear the sub tank.
8. Once clear Water dispenses from the faucet the Hot Tank has been descaled. Always ensure the
WL2FW Water Treatment System is performing to the customer’s satisfaction.
WARNING! HOT WATER. The WL2FW Water Treatment System produces Hot Water up to
87°C (189°F). Water above 52°C (125°F) can cause severe burns or scalding. Hot water should
be dispensed carefully into insulated container to avoidinjury.
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.

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PROGRAMMING INSTRUCTIONS
DISABLING ENERGY SAVING SLEEP MODE
All WL2FW Water Treatment Systems come from the factory with Energy Saving Sleep Mode
engaged to meet the Energy Star Certification requirements. Energy Saving Sleep Mode disables
the heater circuit if the unit has not been used for a continuous 3 hour or longer period.
Selecting any button "wakes up" the WL2FW Water Treatment System and turns the heater
circuit back on. The hot tank will typically take less than 10 minutes to heat the water from
ambient to the 85°C (185°F) set point.
Unplug Power Cord and remove Top Cover to access Heater Control PCB.
1
2
3
1 2
23
Pin Numbers
Heater Control PCB– P/N EN-6131 – WLCP PN 20-0075
WL2FW Water Treatment Systems comes with the
Energy Saving Sleep Mode “ON” - the Default Position.
PCB Jumper JP7 in the "ON" position (Pin 1 and 2)
Deactivate the Energy Saving Sleep Mode by moving
PCB Jumper JP7 to the "OFF" position (Pins 2 and 3).

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PROGRAMMING INSTRUCTIONS
CHANGING FROM HOT TANK THERMOSTAT TO THERMISTOR CONTROL
All WL2FW Water Treatment Systems come from the factory programmed for a Hot Tank
Thermostat. Currently the WL2FW Hot Tank uses a Thermostat. The option to change to a
Thermistor Control is for a future Hot Tank design. Do not change to Thermistor or it will disable
the Hot Tank.
Unplug Power Cord and remove Top Cover to access Heater Control PCB.
1
2
3
Pin Numbers
Heater Control PCB – P/N EN-6131 – WLCP PN 20-0075
1
2
2
3
Thermostat Heater Control is the default.
PCB Jumper JP9 in the "ON" position (Pin 1 and 2)
Thermistor Heater Control
The option to change to a Thermistor Control is for a
future Hot Tank design.
Do not change to Thermistor, it will disable the Hot
Tank.