Minol Zenner ETWD DN20 Single-Jet Hot Water Meter 130 mm

Minol Zenner ETWD DN20 Single-Jet Hot Water Meter 130 mm

• Minol Zenner ETWD single-jet, dry-dial mechanical hot water meter
• Size DN20 (¾”), meter thread G1” (connects to ¾” pipework with unions)
• Permanent flow rate Q3 2.5 m³/h or 4 m³/h (the manufacturer makes DN20 in two versions; the applicable value is shown on the meter label)
• Measuring range (R = Q3/Q1): R80 for horizontal installation, R40 for vertical installation
• Temperature range 0.1–90 °C
• Body length (L) 130 mm; approx. 226 mm with unions
• Installation: horizontal or vertical (also in rising and falling pipes)
• Communication: selectable in the product options — without module, or with pulse, M-Bus or wM-Bus module
• Working pressure MAP 16 (16 bar), pressure loss class 0.63 bar
• MID: EU type-examination certificate DE-07-MI001-PTB010 (PTB, Germany)

Minol Zenner ETKD / ETWD Series

ZENNER ETKD and ETWD are single-jet water meters with a low, compact body, designed for individual consumption billing. ETWD is the hot water model of the family; the cold water model is the ETKD.

The impeller rotation is transmitted to the dry register, which is separated from the water, via a shielded magnetic coupling. The register can be rotated 355°, so after installation it can be turned to face the reading direction.

Key Features

• Single-jet dry dial, shielded magnetic coupling
• Very low-profile, compact body; fits easily into tight meter locations
• 8-digit drum register; smallest reading 0.02 liters, largest 99,999.999 m³
• Starting flow rate below 10 l/h (Q3 2.5 version)
• UV-resistant polymer register cover (IP65); a protective lid can be retrofitted
• Brass body compliant with the UBA (German Environment Agency) list; materials in contact with drinking water comply with German drinking water approval requirements
• Remote reading modules can be retrofitted: LoRaWAN and wM-Bus (868 MHz) radio modules; the version with modulator disc can also use a combined M-Bus + pulse module

Applications

• Metering of each apartment's hot water consumption in apartment buildings and residential complexes with central hot water systems
• Allocation of hot water costs among apartments based on consumption
• Hot water lines in hotels, dormitories, sports facilities and workplaces
• Pulse, M-Bus or radio (wM-Bus, LoRaWAN) reading systems

Why Minol Zenner ETWD?

The low body of the ETWD makes installation easier in narrow shafts and manifold cabinets; since it is suitable for both horizontal and vertical installation, no separate model is needed for different pipe orientations. The meter can be purchased without a module and later upgraded to remote meter reading by fitting a radio or M-Bus module.

Installation, Reading and Re-verification

The meter is installed in the hot water line with the arrow on its body pointing in the direction of water flow. The measuring range is R80 for horizontal installation and R40 for vertical installation. A strainer upstream of the meter and a valve on each side make maintenance and replacement easier.

Check your local regulations for the periodic re-verification requirements of hot water meters.

In Türkiye, Novus Energy provides remote meter reading and consumption-based cost allocation services for buildings with central heating systems.

Other models: Hot water meters · All water meters · All products of the brand: Minol Zenner