Manual Watts HIU 2 series (page 2 of 18) (English)

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2HIU2-IM-DE-W-UK-04-2021-Rev7 | Part no. 10078860

EN ENGLISH

1 General information

1.1 Important information about the installa-

tion and operating manual

The operator is responsible for ensuring

adherence to the local laws and regulations

(e.g. accident prevention regulations, etc.).

Incorrect operation or operating the HIU 2

contrary to the specifications shall void all

rights to any warranty claim.

This installation and operating manual

• is a component of the HIU 2

• contains instructions and information on safe and correct

installation and commissioning of the HIU 2

• must be available to all users throughout the entire service

life of the HIU 2

• is intended for trained personnel who are familiar with the

applicable standards and provisions and, in particular, with

the relevant safety concepts and the operation and mainte-

nance of the HIU 2

• is protected by copyright and may not be altered without

the manufacturer’s permission

• may not be made accessible to unauthorized personnel,

either in original form or as a copy.

1.2 Product conformity

A Declaration of Conformity according to the Machinery

Directive 2006/42/EC has been issued for this HIU 2 product.

1.3 Product features

• Stable bracket

• Intended for installation in a surface-mounted cabinet,

flush-mounted cabinet or EPP insulation.

• All connections to the system with 1" male thread and ¾"

male thread, and flat sealing

• Tapping temperature adjustable

• Max. draw-off capacity of DHW 12 l/min, 17 l/min and 22 l/

min at DHW heated from 10 to 45 °C, at a primary supply

temperature of 65 °C and 200 mbar delta p (12 and 17

Liter Station) or 250 mbar (22 Liter Station).

• Very convenient controls, compact, space-saving design.

• Modular structure and suitable for connection to manifolds.

1.4 Product marking

Contents

1 General information ............................... 2

1.1 IImportant information about the installation and

operating manual .................................................... 2

1.2 Product conformity .................................................... 2

1.3 Product features ........................................................ 2

1.4 Product marking ........................................................ 2

2 Safety ....................................................... 3

2.1 Depiction of safety information .................................. 3

2.2 Important safety information ...................................... 3

2.3 Intended use .............................................................. 3

2.4 Foreseeable misuse ................................................... 3

2.5 Responsibilities of the operator.................................. 3

2.6 Personnel groups ...................................................... 3

2.7 Information on the operating environment ................. 3

3 Technical data ......................................... 4

4 Power curves and diagrams.................. 5

4.1 Pressure loss diagrams ............................................. 5

4.2 Power curves .............................................................7

5 Structure .................................................. 9

5.1 HIU 2 HK .................................................................10

5.2 HIU 2 HKM .............................................................. 11

5.3 Hydraulic diagram .................................................... 12

5.4 Overall dimensions .................................................. 13

6 Installation and commissioning ...........14

7 Maintenance .......................................... 16

7.1 Annual maintenance intervals .................................. 17

7.2 Replacement of wear parts ......................................17

7.3 Cleaning the dirt trap ............................................... 17

7.4 Replacing the plate heat exchanger .........................17

8 Disposal ................................................. 18

8.1 Return shipment to the manufacturer .......................18

8.2 Reporting to administrative bodies and the

manufacturer ............................................................18

9 Warranty ................................................ 18

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Watts HIU 2 series Manual

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