Landis & Gyr T450 Operating Instructions

en Operating Instructions
1 General
Note
These operating instructions remain with the end user after
commissioning.
Note
In the following text, the term "meter" is used to refer to
both the heating meter as well as the cooling meter unless
otherwise stated.
1.1 Use
The meter is used to measure the heat or cold consumed in
heating/cooling systems.
The meter consists of two temperature sensors and a calculator,
which calculates the energy consumption based on the volume
and temperature difference.
1.2 General information
The meter has left the factory in a technically safe condition.
Further technical support is provided by the manufacturer on
request. The meter's calibration-relevant security symbols must
not be damaged or removed. Otherwise, the warranty and
calibration validity of the meter will be invalidated.
• Keep the packaging in a safe place so that you can transport
the meter in its original packaging after the calibration
validity has expired.
• Lay all cables at a minimum distance of 500 mm from power
and high-frequency cables.
• A relative humidity of < 93 % at 25°C is permissible (non-
condensing).
• Avoid overpressure cavitation throughout the system, i.e. at
least 1 bar for qp and approx. 3 bar for qs (applies for
approx. 80 °C).
• The control line must not be cut, shortened or extended.
• In the case of a heat meter or combined heat/cooling
meter, the cold side installation location corresponds to the
return and the warm side installation location
corresponds to the supply
• In the case of a cooling meter
installation location corresponds to the return
cold side installation location to the supply
2 Safety instructions
Caution
The meters may only be used in building installations and
only for the applications described.
© Landis+Gyr
Ultrasonic Heat and Cooling Meter
.
, the warm side
and the
.
Subject to change without prior notice
Caution
The local regulations (installation, etc.) must be observed.
Caution
The operating conditions on the nameplate must be
observed during use. Failure to comply with these
regulations can cause dangerous situations and voids all
claims arising from liability for defects as well as liability on
the basis of any expressly granted guarantees.
Caution
Comply with the requirements for circulation water (CEN /
TR 16911:2016).
Caution
The meter is only suitable for circulation water in heating
systems.
Caution
The meter is not suitable for drinking water.
Caution
Do not lift the metre on the calculator.
Caution
Pay attention to sharp edges on threads, flanges and the
measuring tube.
Caution
Only personnel trained in the installation and operation of
meters in heating/cooling systems may install and remove
the meter.
Caution
Only install or remove the meter on an unpressurised
system.
Caution
After installing the meter, check the leak tightness of the
system.
Caution
Breaking the safety marks relevant for calibration voids the
warranty and the validity of the calibration.
Caution
Avoid contact of the meter housing with silicone oils or
substances containing silicone oil.
3221101003_a
07.02.2020
Translation
T450
07.02.2020 1