Heat Meter Application - INTEGRA Metering CALEC energy master Installation And Operating Instructions Manual

9.1.2

Heat meter application

When used as a heat meter, the transport of energy from a heat source to the consumer is meas-
ured in the supply and return flow of a transport duct. This requires signals measuring the supply
temperature and the return temperature, and signals from a flow sensor. The flow sensor should, if
possible, be mounted on the cold side to reduce thermal effects.
The supply temperature is higher than the return temperature, i.e. Tsupply = Th, Treturn = Tc
The following diagram illustrates the installation with the process signals, the modules with the ter-
minal assignments and the recorded meter readings.
S-EM1.1
Mod.-Typ Mod.-Typ
Mod.-Nr. Mod.-Nr.
Sign.-Typ Sign.-Typ
Sign.-Nr. Sign.-Nr.
E
Variants/special cases:
When installing the flow sensor on the hot side, the installation side of the flow sensor should be
set to Side Q Hot side in the Basic settings/input sub-menu,
The device provides the following meter readings:
E: Cumulative energy
V: Cumulative volume
M: Cumulative mass
18
Supply Supply
3... 6 3... 6
2 2
230 VAC 230 VAC
hot
Tc
cold
Input Input CPU 2 x Pt100 CPU 2 x Pt100
2 2 1 1
Input Input Pt100-Input Pt100-Input
1 1 2 2 1 1
Qv Qv Th Th
Tc Tc
Th
Qv
®
CALEC energy master installation and operating instructions
E E
V V
M M
E