Maintenance - Atlantic SWH 20H M2 Quick Start Manual

than the two live wires. Installation must include upstream of the appliance, an all pole cut-out device (contact opening
at least 3 mm: fuse, breaker switch). When the water pipes are made of insulating material, the electrical contacts must
be protected by a 30 mA earth-leakage breaker conforming to the standards in force.
Thermal circuit breaker: All our products are equipped with a thermostat with thermal circuit breaker and manual
resetting which cuts off the power supply to the water heater in case of overheating. Warning: If the safety trips a) switch
off the power before taking any further action, b) remove the cover, c) check the electrical connections, d) reset the
thermal circuit breaker. If the circuit breaker keeps tripping, replace the thermostat or/and thermal circuit breaker. Never
short circuit the safety cut out or the thermostat. Connect the power supply only via the terminal.
4 - SETUP & OPERATION
WARNING: Never switch on the water heater without water. Before switching on, open the hot water taps, vent the
pipes of air and fill the appliance.
FILL THE WATER-HEATER WITH WATER BEFORE POWERING UP.
INSTALLATION OF A SAFETY VALVE IS MANDATORY BEFORE FILLING THE WATER-HEATER. IRREVERSIBLE
DAMAGES NOT COVERED BY WARRANTY CAN OCCUR IF THE WATER-HEATER IS POWERED UP EMPTY OF
WATER OR IF THE SAFETY VALVE IS NOT INSTALLED.
THE SAFETY VALVE MUST BE OPERATED MANUALLY MONTHLY TO PREVENT ANY MALFUNCTIONING.

Check the water tightness of the pipe work and the door seal below the cover. In case of a leak, tighten slightly.
Check that the water safety devices are working and fill the drain.

Switch on the appliance. The indicator (1, see p1 figh A/B) will light on in red then switch in blue when the water
heater has been heated to the set temperature
Note: After 15 – 30 minutes, depending on the capacity of the appliance, water should drip from the drain hole and/or
safety valve. This phenomenon is due to water expansion and is normal. Check the water tightness of the joints and the
seal.
During heating and depending on water quality, room-sealed water heaters can produce a boiling noise; this is normal
and does not indicate any defect on the appliance. To avoid the development of bacteria (legionella...) ensure that a
temperature of 60°C minimum is reached every day. The thermostat is set at the factory at the stop (65°C or
75°C±5°C).
The heating element is controlled by a thermostat which senses the water temperature. The operating temperature can
be adjusted by the regulation knob on the front of the water heater. In addition to the thermostat there is a thermal cut-
out which is set to switch off the power to the heating element if the thermostat fails and if the water temperature rises
too high. Once the cut-out operates it can only be reset manually (this should be carried out by the installer).
All models of storage water heater have a safety valve provided to be installed on the inlet pipe.
The water heater will only work in the horizontal position as the heating element is shaped to heat the water at the
bottom of the tank. The inlet pipe needs to deliver cold water to the bottom of the tank and the hot water outlet draws
water from the top of the tank.

Adjusting the temperature: The temperature of the water may be adjusted by turning the knob on the front of
the heater. Allow half an hour for the temperature to stabilize between settings. Maximum temperature is
achieved with the knob turned fully clockwise. The red LED light shows when the heating element is working,
under control of the thermostat, when the water in the water heater reaches the preset temperature, the
thermostat deactivates the heating element automatically and Blue LED lights ON to indicate the water is ready
for shower.

Digital display (see fig. A, depending on models): during the heating phase, the digital display shows the
actual temperature reached by the water inside the tank. If the temperature drops, for example due to water
being drawn, the heating is automatically reactivated to reach again the set temperature.The digital display
presents the actual temperature not the set temperature.

Eco mode (see fig. A, depending on models): The ECO position on the regulation knob corresponds to a
water temperature of 55 - 60°C which allows more energy savings while preventing scale build up and
extending the heating element lifetime.
IMPORTANT: If steam or boiling water emerges continuously from a supply tap or a safety valve, switch off the
electricity to the water heater or boiler and call a professional plumbing contractor.

5 - MAINTENANCE

(See General Warnings 9, 11,15 and 17 p.3 & 4)
CAUTION: Before removing the front cover or service cover, make sure the power is turned off to avoid any risk of
injury or electric shock
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