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Waterlogic 4 Firewall Technical Manual - Issue A, October 2010
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IN FAuCET uV
The Unique design allows the faucet area to be steralised before, during and after
every dispense. There are two types of sensors available, the CDS UV sensor that
detects if the UV lamp is working and the UV sensor that monitors the UVC intensity
from the UV lamp.
uV LAMP
The UV light is an 11Watt germicidal lamp at a wavelength of 253.7 NM, which is
very efficient at destroying bacteria in water. The UV lamp is situated in the Firewall
Chamber surrounded by a quartz spiral that attains NSF standard 55 purification
of water. The lamp must be replaced at 6 months intervals, and the quartz spiral
cleaned by using a ultrasonic bath if needed
PCB
The PCB (Printed Circuit Board) is the control unit for the WL4 Firewall, it is
responsible for the functions of all the mechanical and electrical parts (24V DC).
The microprocessor drives the display (at the top of the WL4 Firewall) which informs
the user of the status of the unit. There are two different Models of the display PCB
depending on the UV sensor type used.
COMPRESSOR
The compressor operates at 220-240V at 50Hz. It uses 75 gramms of R134a non-
Ozone depleting refrigerant gas for the High Capacity cold tanks and 45 gramms of
R134a gas for the Standard cold tank.
WATER PIPES AND FITTINGS
The inlet and the internal water circuit pipe size is 1/4” and 5/16”. The entire internal
water circuit and all the components which come in contact with water are food
grade NSF / WRAS approved.
WATER VALVES
Dispensing of water to the customer is achieved by means of a 24V DC electrical
solenoid valve. The valves are energized every time the customer pushes the
dispense button for a drink. DC voltage is used to give a positive and quieter action
of the solenoid valve.
PLASTIC PANELS
The moulded panels are made from recyclable ABS plastic. All the ABS plastic
panels are UV resistant and meet the standards of CE and UL. Please note that the
WL4 Firewall should not be exposed to direct sunlight. Placing the WL4 Firewall
in direct sunlight from a window, close to a radiator, or in a room of high ambient
temperature, will affect the efficiency of the refrigeration circuit.
PARTS REQuIRED FOR SPARKLING WATER
CO2 Cylinder & Gas Regulator: The units with the option of sparkling water will
need CO2 gas, food grade carbon dioxide. This gas is stored in cylinders in a liquid
form. The cylinders are usually painted grey or black (regulation requirement for
CO2). The gas regulator, which comes with the unit, controls the flow of CO2 to the
carbonation tank; it reduces the pressure of the CO2 gas to 45PSI which is needed
to make high quality sparkling water.
WATER PuMP
The water pump is 24V DC and forces the pre-chilled cold still water into the
carbonation tank at a minimum pressure of 45PSI. This pressure is required to
overcome the internal pressure from the CO2 gas which is in the tank and will give
a average of 4.8 grams of C02 per litre of water.
