Glossary UH50 – FOR INTERNAL USE ONLY!
Gyr GmbH
Glossary UH606-101b
Page
7
of
38
Note: These messages can also occur in the event of a system stoppage without incorrect
installation.
Installation
Choose a mounting location with enough clearance, based on the dimension drawings.
Mount the volume measuring unit horizontally or vertically between two shut-off valves in
accordance with the arrow for the direction of flow.
No inlet or outlet sections are necessary. However, if the heat meter is installed in the shared
return of two heating systems, e.g. heating and hot water, the mounting location must be a
sufficient distance from the T element that forms the junction (min. 10x DN) to allow the different
water
temperatures to mix well.
The sensors can be mounted in ball valves or in pockets or directly. The ends of the sensors
must be inserted at least up to the center of the pipe cross-section.
By overpressure, cavitation must be avoided in the entire measuring range, i.e. at least 1 bar at
qp and approx. 3 bar at qs (at 80°C).
Example of mounting with a ball valve
(recommended up to DN25)
Ball
valve
Example of mounting with pockets
(recommended above DN25)
Welded sleeve with pocket
Interfaces of the electronic unit
The UH50 heat meters are equipped with an optical interface per EN 61107 as standard.
Moreover, up to two of the following communication modules can be used for remote reading:
•
Pulses (quantity of heat / volume / unit status / tariff register 1, tariff register 2),
isolated, bounce-free
•
Passive 20 mA current loop (CL) per EN 61107
•
M-bus per EN 1434-3, fixed and extended, variable protocol (also for coupling with
a suitable heating controller)
•
Analog
module
•
Radio
module
•
Multi module (external)
These modules are have no effect on consumption metering and can therefore also be replaced
at any time without violating the adhesive label.
