Regulation Of The Water Temperature; Protection Against A Shortage Of Water; Maximum Temperature Protection - REMEHA Calenta 25s Installation And Service Manual

Calenta 25s - 28c - 35s - 40c
1 2
040412 - 7600585-01
Celcia 10
1
3
qSense
2
iSense
3
It is possible to connect a 2-wire on/off thermostat to the boiler such
as the Celcia 10 or a power stealing thermostat. The boiler output
can be modulated by an OpenTherm system with an appropriate
modulating thermostat such as the qSense or the iSense.
T003757-A
3.3.6.

Regulation of the water temperature

The boiler is fitted with an electronic temperature regulator having an
outlet and return temperature probe. The flow temperature can be set
between 20°C and 90°C. The boiler reduces its power when the set
outlet-temperature is attained. The cutout temperature is the set
heating outlet-temperature + 5 °C.
3.3.7.

Protection against a shortage of water

The boiler is fitted with a safety device to prevent the shortage of water
based on temperature measurements. By reducing its output when
the water flow rate is in danger of becoming insufficient, the boiler
continues to operate as long as possible. If the flow rate is too weak
ΔT ≥ 50°C or the heating flow temperature increases too much, the
boiler is locked for 10 minutes, code 5t[09. When there is no
water in the boiler or the pump is not running, the boiler goes into
safety shutdown, code e[10 at ΔT ≥ 70°C.
3.3.8.

Maximum temperature protection

The overheating safety device locks the boiler when the water
temperature is too high (110°C), code e[12.
¼ For more detailed information, see chapter: "Error codes",
page 85
3. Technical description
15