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Waterlogic 2 Firewall Technical Manual - Issue B, May 2014
COMPRESSOR
The compressor operates at 220-240V at 50Hz. It uses 50 grams of R134a non-
Ozone depleting refrigerant gas for the freestanding models and 40 grams of R134a
gas for mini models.
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. The cold and ambient water tubing inside the machine
should not be exposed to water above 25˚C.
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
WL2 Firewall should not be exposed to direct sunlight. Placing the WL2 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.
FIREWALL CHAMBER
The Firewall chamber incorporates the in-faucet UV and is made of aluminium and
is highly reflective. The chamber houses the UV lamp and quartz spiral as well as
the faucet.
IN FAUCET UV
The unique design allows the faucet area to be sterilised 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 a 15Watt 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 an ultrasonic bath if needed.
PCB
The PCB (Printed Circuit Board) is the control unit for the WL2 Firewall, it is responsible
for the functions of all the mechanical and electrical parts (24V DC). There are two
PCB’s in this unit: a Display PCB and a Main PCB.
