Chaffoteaux MIRA SYSTEM 24 CF [15/20] Operation

Starting up

1. check that the appliance's general gas shut-off tap is open and that the boiler is supplied with power.

2. check that there is sufficient pressure in the heating circuit: pressure gauge needle at least 1.2 bar with 1.7 bar at max. cold

3. open gas inlet tap 33 (fig. 21)

Your boiler is now ready to operate.

Important

When the appliance is operated after a prolonged period of inactivity, the presence of air in the gas flues may hinder the first

attempts at igniting the gas.

See § 20 Operating faults

To obtain heating and hot water (system plus):

Press ON/OFF button 20; the button lights up green.

- turn knob 21 to preheat the sanitary tank (compy system plus). This button allows you to adjust the hot water

temperature. While the tank is pre-heating, LEDs 23 light up 2 by 2 in sequence.

- turn knob 22 to authorise heating ignition. This knob allows you to adjust the water temperature in the heating circuit

according to seasonal requirements. Indicator 23 displays the temperature.

• Turn knob 22:

- towards Max. in cold weather

- towards Min in mild weather

Furthermore, if your home is fitted with a room thermostat, set it to the desired indoor temperature.

N.B. Orange indicator light 24 lights up every time the burner ignites

Stopping the heating

- Set knob 22 to the OFF position. The boiler then produces only hot water.

Setting to pilot

- Set knobs 21 and 22 to the OFF position, leaving button 20 (fig. 20) lit. The function remains active unless the boiler freezes.

Turn off the boiler completely

- press push button 20 and the light goes out

- turn off the electricity supply to the boiler heater.

- shut off the gas supply by turning tap 33 (fig. 21)

13. Operation

Note:

In certain cases of installation it is possible that, after reheating the tank (system plus), the pipes (and possibly a radiator) may

heat up slightly. To prevent this, simply close heating inlet tap

31 (

fig. 21).

Remember to re-open it at the start of the heating season, when you switch the heating back on by pressing button

(fig. 20)