Danfoss HDU-SF Service guide

MAKING MODERN LIVING POSSIBLE

Service Guide

HDU-SF (Horizontal Distribution Units - Single Flat)

www.heating.danfoss.com

Danfoss A/S is not liable or bound by warranty if these instructions are not adhered to during installation or service.

The English language is used for the original instructions. Other languages are a translation of the original instructions. (Directive 2006/42/EC)

© 2012 Copyright Danfoss A/S

Service Guide			HDU-SF (Horizontal Distribution Units - Single Flat)
	Table of Contents
1	Introduction . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
	1.1	Overview . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
	1.2	Technical Data . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
	1.3	Accessories and Spare Parts . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2	Drain and Vent . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3	Replacing the Strainer Filter . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4	Shutting off the Flow . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5	Heat Meter . . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
	5.1	General . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
	5.2	Power Supply . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
	5.3	Operation . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
	5.4	Display Indications . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
	5.5	Error Codes . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
	5.6	Extension Modules . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6	Replacing the Heat Meter . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1	Introduction

1.1Overview

HDU-SF single-port

HDU-SF multi-port

1.Ball valve for inand outlet connection to the riser.

2.Strainer to trap dirt, sand etc. from pipe water (replacement filter available as accessory).

3.AB-PM automatic balancing valve, combines three functions: differential pressure controller, control valve with linear characteristic and flow limiter.

4.Manifold for radiator connection, flow.

5.Manifold for radiator connection, return.

6.Automatic air vent and drainage (both inlet and outlet has drainage and air vent possibilities).

7.Heat meter for energy measuring, with 8-digit LCD.

8.Cabinet.

Danfoss Heating Solutions

VIIGB102

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Service Guide	HDU-SF (Horizontal Distribution Units - Single Flat)

Note! HDU-SF are available with left or right side connections to riser. In this Service Guide all illustrations are shown for the left side version.

1.2	Technical Data
Max. temperature		90 °C
Max. working pressure		2 bar
Nominal required differential pressure over Unit (HDU-SF)		0.26 bar*
Max. differential pressure in a control loop		0.22 bar
Max. static pressure		10 bar (PN 10)
Connection to riser (in and out)		R 3/4"
Connection to radiator		3/4"
Power supply (Heat meter)		A-cell battery, 3.6 VDC

* At differential pressure in control loop 10kPa at 100% AB-PM setting.

1.3Accessories and Spare Parts

Product	Code no.
Manifold port plugs (10 pcs.)	003L1246
Filter for strainer	065B8248
Impulse tube with fittings for AB-PM	003L8152

2		Drain and Vent
For draining the inlet and outlet:
	▪	close ball valves on supply and return inlet pipes.
	▪	use the cap hanging on the drain to open the drain.

The HDU-SF is automatically vented, if necessary.

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VIIGB102

Danfoss Heating Solutions

Service Guide		HDU-SF (Horizontal Distribution Units - Single Flat)
3	Replacing the Strainer Filter

1.Close ball valves on supply and return inlet pipes.

2.Close all inlet manifold circuits after the AB-PM, using a 5 mm Allen key.

3.Remove the strainer cap and replace the filter.

4	Shutting off the Flow

1. Close both ball valves to shut off all radiator circuits in the apart-
ment.

2. Use the manual shut off in the manifold to close a single radiator circuit., using a 5 mm Allen key. Make sure to close both inlet and outlet for the circuit.

5	Heat Meter

5.1General

	SONOMETER™1100		Heat meter
			Made in Germany
V
ΔT	T	GPM
-V					3030716
			087G6103
			Installation: high temp.
			S/N: 41598383
			qs: 5m3/h		Θ: 1....180°C
			qp: 2.5m3/h		ΔΘ: 3...177K
			qi: 0.025m3/h		Pt 500
			PS/PN: 16		class 2
			DN20	IP54	E1 / M1
			Θq: 5...130°C		P.-Year 2012

The following guidelinesmust be observed:

▪The cables supplied with the meter must not be shortened or changed in any other way.

▪The regulations on the use of energy meters must be observed!

▪The meter installation is only to be performed by an authorized installer and/or electrical contractor using personnel trained in the installation and use of electrical equipment and familiar with the Low Voltage Directive.

▪The specified operating/ambient conditions are 5 … 55 °C; IP54; 93 % rel. humidity.

The IZAR@SET software is used for readout/parametrization.

Danfoss Heating Solutions

VIIGB102

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