5.10 Refill water
Leaks on the consumers side (secondary side) will result in falling
static pressure and thereby a poor supply of heating. A refill water
function can inject water to increase the static pressure.
The A333 application can monitor the static pressure and enable
the refill water function when the pressure is too low.
The pressure is measured by means of a pressure transmitter S10
(giving a 0 - 10 volt signal in relation to the measured pressure).
The refill water function can operate with one or two refill water
pumps, P3 or P3 / P4. In addition a refill water valve V1 is controlled.
When operating with two refill water pumps, the pumps are
controlled alternately, according to a time set-up.
When a too low pressure is detected the refill water pump is
switched ON and, after a set time, the ON-OFF valve is activated.
The controller awaits ("Time-out") the pressure at S10 to build up. If
an acceptable pressure is not achieved, an alarm is generated and
the ECL Comfort controller switches OFF the pump in question.
The alarm function is disabled if the "Alarm handling" (ID no. 12316) is
set to OFF.
Settings for pressure transmitter signal (0 - 10 volt) and conversion
into pressure value are described in the section "S7 - S10".
MENU > Settings > Refill water
Time Left
Read-out
Circuit
Setting range
Factory setting
1
-
-
Number of hours before a refill water pump change-over command takes
place.
VI.GU.T2.02
© Danfoss | 2017.09 | 103
Operating Guide ECL Comfort 310, application A333
