Boiler Temperature Control; High Limit Temperature Protection; Low-Water Protection (Flow And Content) - REMEHA Quinta 45 Technical Information

Fig. 13 control box
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NOTE: Do not use connector X8!

8.2.4 Boiler temperature control

The Remeha Quinta 45 and 65 has electronic temperature control with flow and return
temperature sensors. The flow temperature can be adjusted between 20 and 90°C.

8.2.5 High limit temperature protection

The high limit temperature protection device switches off and locks out the boiler when
the flow temperature exceeds the high limit set point (adjustable). When the fault is
corrected, the boiler can be restarted by using the 'reset'-key on the control panel.

8.2.6 Low-water protection (flow and content)

The Remeha Quinta 45 and 65 is supplied with a low-water protection on the basis
of temperature measurement, see Fig. 22 Boiler sensor resistance/temp graph. By
modulating back at the moment that the water flow threatens to fall too low, the boiler
is kept operating for as long as possible. In the event of low flow (F/R t = 45°C), the
boiler will shut off and not lockout (ref. Par. 6.4).
If the boiler is fired dry, it will go to high temperature lock out, failure code 1*
55979.indd 44 55979.indd 44
Quinta 45/65
44
Remeha
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2-4-2009 9:42:40 2-4-2009 9:42:40