Maktek OMEGA, Installation And Service Manual

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6.6 FROST PROTECTION
When the temperature in the heating system drops down to 5°C, there is security system that
automatically activates the resistances When the water temperature reaches 40°C, activation
of resistances are stopped.
In order for this system to work, the main switch to which the device is connected must be
switched on and the heating and hot water selector switches must be set to the minimum
setting.
6.7 DOMESTIC HOT WATER NTC SENSOR
When a sensor failure occurs in hot water system, H2 warning code appears on LCD screen.
6.8 CENTRAL HEATING NTC SENSOR
When a sensor failure occurs in central heating system.H1 warning code appears on the LCD
screen
6.9 HIGH WATER PRESSURE PROTECTION
When there is over pressure in the heating system, the 3 bar safety valve discharges water
and decreases the pressure.
6.10 PRECAUTION AGAINST PUMP LOCK
When the boiler is in the OFF position, the pump is operated in every 24 hours by the control
card for a certain period of time to prevent locking and jamming of the pump.
6.11 3-WAY VALVE ACTUATOR MOTOR SAFETY
When the boiler is in the OFF position, the 3-way valve is operated in every 24 hours by the
control card for a certain period of time. The motorized valve returns to its previous position
after a certain period of time after changing the position.
6.12 AUTOMATIC BY-PASS
If there is thermostatic valve one each radiator, even when all thermostatic valves are
switched off, there is an automatic by-pass system in order to provide the passing of
minimum water flow in order to prevent rapid over heating of the boiler.
&
•
The stand-by safety systems of the boiler; such as frost protection, pump lock protection
and 3-way valve actuator motor safety are only active if the electricity and gas
connections of the boiler are on. The valves on the installation should not be closed.
•
Especially during winter, when the ambiant temperature decreases below 0°C there is a
risk of freezing and the system water must be drained if the electrical connection of the
device is interrupted during these periods.
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CAUTION!