Landis Gyr T450 Ultrasonic Heat and Cooling Meter Instruction Manual

Landis Gyr T450 Ultrasonic Heat and Cooling Meter

Ultrasonic Heat and Cooling Meter

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.

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.

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 , the warm side installation location corresponds to the return and the cold side installation location to the supply

Safety instructions

Caution
The meters may only be used in building installations and only for the applications described.

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 meter 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.

Caution
Only clean the meter from the outside with a soft, slightly moistened cloth. Do not use spirits or cleaning agents.

Warning
If the medium temperature is higher than 60 °C, shield the volume measuring part from unintentional contact.

Warning
The meter must not be energized until it has been fully assembled. Otherwise there is a risk of electric shock on the terminals. A defective or obviously damaged device must be disconnected from the power supply immediately and replaced.

Warning
The meter is valid for disposal as waste electronic equipment within the meaning of the European Directive 2012/19/EU (WEEE) and must not be disposed of as household waste. The corresponding national and legal regulations must be observed and the device must be disposed of via the channels provided for this purpose. The local and currently valid legislation must be observed.

Warning
The meter contains lithium batteries. Do not dispose of the meter and batteries as household waste. Observe local regulations and laws regarding disposal.

Warning
After lithium batteries have been used, you can return them to the manufacturer for proper disposal. When shipping batteries please observe legal regulations which among other things govern the labelling and packaging of hazardous goods.

Warning
Do not open the batteries. Do not bring batteries into contact with water or expose to temperatures exceeding 80°C.

Warning
The meter has no lightning protection. Ensure lightning protection via the house installation.

Operation

Operating elements

Figure 1: Meter, closed

LCD

Display current meter reading

The meter displays the current meter reading in kWh, MWh, MJ or GJ.

Note
To avoid reading errors, the decimal places of displayed values are marked by a frame.

Note
The calibrated value is indicated by an additionally displayed star symbol (S12).

Note
Depending on the device parameterization, both the display scope and the displayed data may deviate from this description.

Display values
The meter displays are arranged in multiple loops (LOOPs). The default state is LOOP 0.

Proceed as follows to switch between the LOOPs:

• Press button 2 until the desired LOOP appears. After the last loop LOOP LE, LOOP 0 is displayed again.

Advancing in a loop
To advance to the next display value within a loop, proceed as follows:

• Press button 1.
  After the last display value, the first display value appears again.

Loop “LOOP 0”
The meter is in loop “LOOP 0”.

• Press button 1 to advance to the next display value.
  The LCD displays the following values one after the other:

Table 1: Loop “LOOP 0”

location: Return flow; tariff on)
| | Current volume
| | Current value tariff register 1 (only if tariff was selected)
|
| Current value tariff register 2 (only if tariff was selected)
| | Current value tariff register 3 (only if tariff was selected)
| | Segment test
| | Firmware version
****| | CRC/CMAC

Error messages

The meter constantly performs a self-diagnosis and can recognize and display various metre and installation errors.
If the error message F0 is displayed, flow measurement is not possible, e.g. due to air in the volume measuring section.
The error messages F1, F2 and F5, F6, F8 indicate that the temperature sensors are defective.
If the error message F4 is displayed, the battery is empty.
The error messages F3, F7, F7F and F9 indicate that the electronics are defective.
In all cases, notify the Service Department.

Technical data

General
Note
Please note the information on the meter

Calculator

| | Ambient temperature| 5 … 55 °C
---|---
Housing protection class| IP 54/IP 68 optional (EN 60529)
Response limit for ΔT| < 0.2 K
Temperature difference ΔT| 3 K … 120 K
Temperature measurement range| 0 … 180 °C
LCD| 8-digit

**Temperature sensor**

0 … 180°C (from 100 mm overall length)

**Volume measurement unit**

National approvals may differ.

recommended for…|
… heating applications| 10 … 130 °C
… cooling applications| 5 … 50°C
Maximum overload| 2.8 x qp
Nominal pressure| PN16 (PS16), PN25 (PS25)

**Power supply**

Declaration of conformity

Landis+Gyr GmbH Humboldstrasse 64 90459 Nuremberg Germany

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