16
Circulation pump
Head avaiable
To system
Residual head for the heating system is shown as a function of rate of fl ow in the graphs in
fi g. 7 with CH thermostatic mixing valve setted to 60°C.
Set the pump speed of the heating circulation pump according to the system head (Fig.
7).
Use the lowest setting that manages the heating demand for best effi ciency.
Fig. 7
0
100
200
300
400
500
600
0
Flow rate (l/h)
Head (mbar)
100
200
300
400
500
600
700
800
900
Central Heating Residual Head
l/h
Speed 1
Speed 2
Speed 3
0
400
545
600
400
212
432
517
700
258
378
800
314
-
-
-
Speed 1
Speed 2
Speed 3
The energy meter is used for measurement of both heat and cooling in all water based
plants. The meter is simple to read and verify. The energy meter receives volume pulses
from the connected fl ow meters and calculates the energy for every predetermined water
volume. The energy calculation includes temperature measurements in fl ow and return as
well as correction for density and heat content according to EN 1434.
The energy meter is calibrated at factory and it is available on request.
Kit Energy meter code 8109811 (for code 8111004)
