Installation
3.3 Thermal energy meter WMZ
3.3.1
General Description
The thermal energy meter is for calculating precisely the quantity
of thermal energy. It is available as an accessory.
Sensors in the flow and return and an electronics module acquire
the measured values and transmit a signal to the heat pump
manager, which, depending on the current operating mode of the
heat pump (domestic hot water/swimming pool), totals the
3.3.2
Hydraulic and electrical integration of the thermal energy meter
The thermal energy meter requires two measuring devices for
data acquisition:
A measuring tube for the flow measurement.
This must be installed in the heat pump flow, upstream of the
branch for domestic hot water preparation (observe flow
direction).
A temperature sensor (copper pipe with immersion sleeve).
This must be installed in the heat pump return.
Hydraulic and electrical components of the thermal energy meter
thermal energy in kWh and displays it in the operating data and
history menu.
NOTE
The thermal energy meter complies with the quality requirements of the
German market incentive programme subsidising efficient heat pumps.
The thermal energy meter is not subject to obligatory calibration and can
thus not be used for the heating cost billing procedure!
The installation locations for both measuring tubes should be as
close to the heat pump as possible in the generator circuit.
To avoid eddying effects which could lead to incorrect measure-
ments, there should be a gap of 50 cm between the measuring
devices and other installed components such as pumps or
valves.
3.3
EN-5