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3.3 Thermal energy meter WMZ
3.3.1
General description
The thermal energy meter (WMZ 25/32) on reversible heat
pumps with an additional heat exchanger is for calculating
precisely the quantity of thermal energy given off by the
additional heat exchanger. It is available as an accessory.
Sensors in the flow and return flow of the additional heat
exchanger lead 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
3.3.2
Hydraulic and electrical integration of the thermal energy meter
The thermal energy meter requires two measuring devices for
data acquisition.
The measuring tube for the flow measurement
This must be installed in the heat pump flow of the additional
heat exchanger 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 of the
additional heat exchanger.
Fig. 3.6:
Hydraulic and electrical components of the thermal energy meter
(domestic hot water/swimming pool), totals the thermal energy in
kWh and displays them in the operating data and history menu.
NOTE
The thermal energy meter complies with the quality requirements of the
German market incentive programme subsidizing 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.
The distance from pumps, valves and other installations must be
taken into account, as eddying effects could lead to incorrect
thermal energy metering (a calming section of 50 cm is
recommended).
452115.66.26 FD 9404
WPM Econ5
EN-5
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