
24
3.5 Turning the boiler OFF
• Turn both the CH control knob and the DHW control knob to the OFF
position.
• Turn the gas and electricity supplies to the boiler OFF.
• If the boiler is switched OFF when there is a likelihood of frost; water
in the boiler should be drained off by opening the house central heat-
ing drain tap.
3.6 Central Heating System Discharge
Do the following in case of a discharge of the central heating system
water;
• Turn on the drain tap at the bottom of the central heating system.
• Open the air release taps of radiators. Begin from top radiator to bot
-
tom one.
• Close the air release taps after draining the water.
ATTENTION!
It is not recommended to discharge the system except for
the necessary events.
• When the boiler is switched off at the switch on the control panel, the
word OFF appears on the display. The D.H.W and central heating
frost protection system, nevertheless, remain enabled. If the boiler
was previously on, it is switched off and the post-ventilation, pump
overrun, circulation pump and three-way valve inactivity protection
functions are enabled.
3.7. Topping-up the system with water
The water pressure in the central heating circuit must be checked in
case of a DHW request error notification. The pressure gauge located
in front of the pump, should be within the green region and must not be
less than 1 bar.
If there is insufficient water in the
boiler, the error code F0 (Table 7)
will appear on the display indicat-
ing that there is not enough water
in the system.
Figure 9 Hydraulic Group- Manual filling tab
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Страница 2: ...2 Code No A 1 2 8i Publishing Date 200114 Revision Date 200114 ...
Страница 36: ...36 HARMONY_D USERS INSTALLATION AND SERVICE MANUAL 27 Figure 15 Wall Connections Figure 16 Extensions Elbow ...
Страница 70: ...70 HARMONY_D USERS INSTALLATION AND SERVICE MANUAL 55 Appendix A FAULT DETERMINATION ...
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