4.3 Thermal energy meter WMZ
4.3.1 General description
The thermal energy meter (WMZ 25/32) is used for measuring
the quantity of thermal energy supplied. It is available as an ac-
cessory. Due to the additional heat exchanger, two thermal en-
ergy meters are required for measuring the quantity of thermal
energy.
Sensors in the flow and return of the heat exchanger pipes and
an electronics module acquire the measured values and transmit
a signal to the heat pump manager, which, depending on the cur-
rent operating mode of the heat pump (heating/DHW/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 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!
4.3.2 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 (observe flow
direction).
A temperature sensor (copper pipe with immersion sleeve)
This must be installed in the heat pump return.
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.
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5
Transport
ATTENTION!
When transporting the heat pump, ensure that it is not tilted more than
45° (in any direction). It may briefly be tilted up to 60° (when being
transported through doors).
If possible, use the pallet for transporting the heat pump to its
final installation location. The basic device can be transported
with a lift truck, hand truck or by means of 3/4" pipes fed through
the holes in the base plate or frame.
The heat pump and the transport pallet are joined by four transit
bolts. These must be removed.
Before using the holes in the frame, it is advisable to remove
each of the side panel assemblies. This is done by loosening
each of the two screws at the base and then withdrawing the
panels by unhooking them from above. Rehang the panels by
gently pushing them in an upwards direction.
Be careful not to damage any components when inserting the
pipes through the frame.
At the installation location, 8 black dust caps, which are included
in the packaging of the device, must be snapped into the trans-
port holes.
Opening the cover
452160.66.44 · FD 9401
LIKI 14TE
Closing the cover
EN-5