Landis Gyr Retur T230 Ultrasonic Heat and Cooling Meter User Manual
- June 9, 2024
- Landis Gyr Retur
Table of Contents
Landis Gyr Retur T230 Ultrasonic Heat and Cooling Meter User Manual
Note: In the text below, the term meter refers both to the heat meter and to the cooling meter and the combined heat and cooling meter, unless otherwise specified.
General
Use
The T230 is used as a meter for heating or cooling consumption measurement in systems with water. The meter consists of a high-tech plastic volume measurement unit, two temperature sensors connected in a fixed position and an electronic unit that calculates the energy consumption from the volume and temperature difference. The meter combines modern microcomputer technology with innovative ultrasonic measuring technology for which no mechanically moving parts are necessary. This technology is thus wear free, robust and largely maintenance free. High precision and long-term stability guarantee precise and equitable cost accounts.
Note: The meter cannot be opened without damaging the security seal.
General notes
The meter left the factory in a faultless condition where safety is concerned. The manufacturer will provide additional technical support on request. Calibration relevant security seals on the meter must not be damaged or removed. Otherwise, the warranty and calibration validity of the meter will no longer apply.
- Keep the packaging so that you can transport the meter in its original packaging following expiry of the calibration validity.
- Lay all cables at a minimum distance of 500 mm to high voltage and high frequency cables.
- A relative humidity of < 93% at 25 °C is permissible (without condensation).
- Avoid cavitation in the whole system due to overpressure i.e. at least 1 bar at qp and approx. 2 bar at qs (applies for approx. 80 °C).
Safety information’s
The meters may only be used in building service engineering plants and only
for the applications described.
The local regulations (installation etc.) must be adhered to.
The operating conditions according to the type platemust be complied with during use. Non-compliance can result in hazardous situations and the expiry of all claims arising from liability for defects as well as liability based on any expressly granted guarantees.
Do not under any circumstances carrying out welding, drilling or soldering
work close to the meter.
The meter is only suitable for circulating water in heating systems.
The meter is not suitable for drinking water.
Requirements for circulating water (CEN/TR 16911: 2016).
Only install or remove the meter when the pipes are pressure-less. After installing the meter, check the leak-tightness of the system. Guarantee and calibration validity will lapse if the calibration relevant security seal is broken. Only clean the meter from outside with a soft, lightly wetted cloth. Do not use any spirit or cleaning solvent. As far as disposal is concerned, the meter is a waste electronic appliance in the sense of European Directive 2012/19/EU (WEEE) and it must not be disposed of as domestic waste. The relevant national, legal regulations must be observed as the appliance must be disposed of via the channels provided for this purpose. The local and currently valid legislation must be observed. The meter contains lithium batteries. Do not dispose of the meter and the batteries with domestic waste. Observe the local stipulations and laws on disposal. You can return the lithium batteries to the manufacturer for appropriate disposal following use. When shipping please observe legal regulations, in particular, those governing the labelling and packaging of hazardous goods. Do not open the batteries. Do not bring batteries into contact with water or expose to temperatures above 80 °C. The meter does not have any lightning protection. Ensure lightning protection via the in-house installation.
Installation
To install the meter, proceed as follows:
- Determine the place of installation in line with the inscription on the meter.
Note: At a heat meter or combined heat/cooling meter the mounting place
of the flow sensor cold side is equivalent to return . The mounting place of
the flow sensor hot side is equivalent to flow
Note: At a cooling meter the mounting place of the flow sensor hot side
is equivalent to the return . The mounting place of the flow sensor cold side
is equivalent to flow .
Note: At a meter with an adjustable mounting place , the mounting place
hot side is displayed as . The mounting place cold side is
- Observe the dimensions of the meter and check whether there is enough space available.
- Rinse the system thoroughly before installing the meter.
- Fit the meter vertically or horizontally between two slide valves so that the arrow on the housing and the flow direction match. Also observe the installation situations and the following examples of installation.
Note: Only use the flat seals that are supplied.
- The meter must not be exposed tensions or forces caused by pipes or fittings. If this cannot be permanently guaranteed, it is necessary to improve the point of installation or fix the lines in position, by means of suitable connecting brackets for example.
- Fit the temperature sensors in the same circuit as the meter. Observe the admixtures.
- Seal the temperature sensor and the fittings to protect against manipulation.
- If you install the meter for cooling metering, follow the appropriate notes.
Recommendation: If you are installing several meters, the same installation conditions must be consistent for all meters.
Change mounting place
Note: The mounting place is locked and can’t be changed after the meter has detected a volume of 10 liters. As a result, the “P” disappears from the display
For meters with adjustable mounting place, the mounting place can be set manually. Proceed as follows:
- Hold the button several times long (for more than 3 s) until appears on the LCD.
- Press the button briefly repeatedly until or appears on the LCD.
- To change the mounting place, press the button longer (more than 3 sec). The LCD display changes. The change happens automatically. The mounting place is locked and can’t be changed after the meter has detected a volume of 10 liters.
- Adjust the temperature sensors according to the installation requirements.
Installation notes
Note: When installing the meter, the locally applicable installation regulations for meters must be observed.