Low-loss header MVW DN 20 (¾")

for boilers with integrated pump

Manufacturer:

PAW GmbH & Co. KG
Böcklerstr. 11 31789 Hameln
Germany
info@paw.eu

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Technical data

Operating data

Max. operating temperature: 110 °C

Max. operating pressure: 6 bar

Temperature difference: K

Dimensions

Nominal diameter: DN 20 (¾")

Installation height: 78 mm

Centre distance: 90 mm

Height insulation: 82 mm

Materials

Valves and fittings: Brass

Gaskets: EPDM

Insulation: EPP

Description

By means of the conversion kit (item no. 3143), the modular distribution manifolds get a bypass which connects the flow and return line without causing any resistance (low-loss header).
It must be considered that the pump of the boiler circuit must deliver a higher flow rate than the consumer pumps need in total.Otherwise, unwanted circulations occur on the right or left end of the low-loss header.In that case a hydraulic separator (item no. 3142 or 31421) must be installed below a distribution manifold.

Please note:
When you plan the system you must already check whether a low-loss header can be used.In combination with central heating boilers, hydraulic separators must be installed below / upstream of a distribution manifold as the boiler delivers a flow rate with a high temperature difference (leads to unwanted circulation in low-loss headers).

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Product information

Safety instructions
The installation and commissioning as well as the connection of electrical components require technical knowledge commensurate with a recognised vocational qualification as a fitter for plumbing, heating and air conditioning technology, or a profession requiring a comparable level of knowledge [specialist].
The following must be observed during installation and commissioning:
- relevant local and national regulations
- accident prevention regulations of the professional association
- instructions and safety instructions mentioned in these instructions.

CAUTION
Personal injury and damage to property!
The product must only be used in heating circuits filled with heating water according to VDI 2035 / Ö-Norm H 5195-1. The product must not be used in domestic water applications.

NOTICE
Material damage due to mineral oils!
Mineral oil products cause lasting damage to seals made of EPDM, whereby the sealant properties get lost. We do not assume liability nor provide warranty for damage to property resulting from sealants damaged in this way.
- It is imperative to avoid that the EPDM sealing elements of the unit get in contact with substances containing mineral oils.
- Use a lubricant based on silicone or polyalkylene and free from mineral oils, such as Unisilikon L250L and Syntheso Glep 1 of the Klüber company or a silicone spray.