Dantherm HEX 70 Bedienungsanleitung

Betjeningsvejledning DVC-styring

Side 3

User’s guide for the DVC controller

Page 23

HEX 70/90/120

Service manual

No. 067333 • rev. 1.0 • 29.06.2011

Der tages forbehold for trykfejl og ændringer

Dantherm can accept no responsibility for possible errors and changes

Irrtümer und Änderungen vorbehalten

Dantherm n’assume aucune responsabilité pour erreurs et modifications éventuelles

067333 •Version 1.0 • 29.06.2011

Introduction

Overview

Introduction

This is the service manual for the heat exchangers HEX 70/90/120.

The table of content below gives you an overview of the main sections. Please see the

complete table of content for further information about the sections.

Serial number

This manual covers units with serial numbers equal or higher than:

1105010000000

Table of contents

This service manual covers the following main topics:

Topic

See page

Table of content, complete

General information

Product description

Mounting and installation

Service guide

Technical data and dimensions

Index

Table of content

Introduction

This is the complete table of content covering all sections in this service manual.

Each main section will begin with an introduction including a separate table of content

covering the exact section.

Table of content

This service manual covers the following topics:

Topic

See page

Introduction

Table of content

General information

Product description

Functional description of HEX 70/90/120 and parts

Control board

Mounting and installation

Service guide

Preventive maintenance

Spare part list

How to replace the internal fan

How to replace the external fan

How to replace the control board

Service agreement

Technical data and dimensions

Wiring diagram

Index

067333 •Version 1.0 • 29.06.2011

General information

Introduction

This section gives you the general information about this service manual and about the unit.

Manual, part no.

Part number of this service manual is 067333.

Target group

The target group for this service manual are the technicians who install and maintain

the HEX 70/90/120 unit as well as the users of the unit.

Copying of this service manual, or part of it, is forbidden without prior written permission

from Dantherm Air Handling.

Reservations

Dantherm Air Handling reserves the right to make changes and improvements to the

product and the service manual at any time without prior notice or obligation.

EC-Declaration of

Conformity

Dantherm Air Handling A/S, Marienlystvej 65, DK-7800 Skive hereby declare that the

units mentioned below with the corresponding part numbers

HEX 70/90/120: 352915/352916/352917

are in conformity with the following directives:

2006/42/EF Directive on the safety of machines

2006/95EC Low Voltage Directive

2004/108/EF EMC Directive

- and are manufactured in conformity with the following standards:

EN 60 950-1: 2006

EN 60 950-1/A11: 2009

EN 61 000 6-2 Immunity : 2005

EN 61 000 6-3 Emission : 2007

Skive, 29.06.2011

Recycling

The unit is designed to last for many years. When the time comes for the unit to be re-

cycled, the unit should be recycled according to national rules and procedures to pro-

tect the environment.

Product description

Overview

Introduction

This section will give you a description of the HEX 70/90/120 and its functionality.

Content

This section covers the following topics:

Topic

See page

Functional description of HEX 70/90/120 and parts

Control board

067333 •Version 1.0 • 29.06.2011

Functional description of HEX 70/90/120 and parts

Introduction

This section describes how the internal and the external fans of HEX 70/90/120 oper-

ate.

Usage of

HEX 70/90/120

HEX 70/90/120 is designed to control the internal temperature of an outdoor enclosure

with respect to climate, moist and air.

HEX 70/90/120 removes excess heat from electronic equipment and is especially suit-

ed to maintain equipment within defined temperature limits to achieve optimum perfor-

mance and to maximize lifetime of the components in the installation.

Important

Dantherm Air Handling recommends that the cooling system should be running contin-

uously!

Two separate air

flows

The illustration and table below show the airflows of HEX 70/90/120.

The two air flows (internal/external) operate separately. External air is only used to cool

down internal air via the heat exchanger. The air flows are not mixed.

Part

Function



External airflow



Internal airflow



Internal fan



External fan



Control board

Internal air flow

Warm, internal air is sucked from the enclosure into the internal fan at the top of

HEX 70/90/120 and let through the heat exchanger, where it is cooled down. After cool-

ing in the heat exchanger, the air is let back into the enclosure.

External air flow

Cold, external air is sucked into the external fan at the bottom of HEX 70/90/120 and let

through the heat exchanger, where it cools down the internal air. After passing through

the heat exchanger, the air is let back to the external environment at the top of the unit.

Continued overleaf









Functional description of HEX 70/90/120 and parts, continued

Control strategy

The control board controls fans according to the air temperature in the cabinet of the

top. Higher temperatures equal higher fan speed.

Internal

fan strategy

This illustration and the tables below show the speed of the internal fan according to

different temperatures.

Internal

temp.

HEX 70

HEX 90/120

IT 0

18°c

16°c

IT 1

20°c

IT 2

30°c

IT 3

50°c

Rotation

speed

HEX 70

HEX 90/120

IR 1

1100 RPM

1400 RPM

IR 2

1920 RPM

2250 RPM

External fan strate-

This illustration and the tables below the speed of the external fan according to differ-

ent temperatures.

Internal

temp.

HEX 70

HEX 90/120

IT 0

28°c

26°c

IT 1

30°c

IT 2

35°c

IT 3

50°c

55°c

Rotation

speed

HEX 70

HEX 90/120

IR 1

1100 RPM

950 RPM

IR 2

1850 RPM

1400 RPM

Top temperature inside the cabinet

067333 •Version 1.0 • 29.06.2011

Control board

Introduction

This section describes key features of the control board and how it operates.

Control system

The illustration on the right and the table below describe the

control board.

HEX 70/90/120 is controlled via a controller that controls the

speed of the fans.

The key features of the controller are:

Onboard temperature sensor (NTC type)

Microprocessor based control in accordance with preselect-

ed strategy

Shared alarm output

Polarity protection

Input voltage ÷ 40 V DC to -60 V DC

Alarm output is “Normally closed” (NC)

Sensor failure alarm (LED)

Fan and high temperature failure alarm (LED)

Part

Function

RS 232

For factory testing and further information from the controller

Alarm LED

Alarm signals:

Flashing: sensor failure

Constant = fan failure or high temperature

Alarms can be monitored (potential free contact) on the pow-

er/alarm plug.

See more about fault finding in the section “Preventive mainte-

nance”, page 12.

9 pin,

sub-D, male

Power and alarm plug

Pin designation:

1 N/C (not connected)

2 + 48 V DC

3 + 48 V DC

4 NC

5 Alarm +

6 0 V DC

7 0 V DC

8 NC

9 Alarm ÷

9 pin,

sub-D, female

When this plug is removed, testing the fans can be done. Fans

will run at maximum speed when the plug is removed.

NB: The plug should always be mounted during normal opera-

tion









Mounting and installation

Introduction

This section guides you through mounting and installation of HEX 70/90/120.

Caution!

Only trained and certified technicians are allowed to mount and install the unit.

Switch off DC supply before working on the unit

Make sure all work has been performed before switching on the power again

Before you start

Make sure you have the following available before you begin installing the unit:

Mounting kit (sub-D plug, plus four M8 x 170 mm mounting screws with washers)

Power/alarm cable (9 pin sub-D, female)

Mounting

Follow this procedure to mount the unit on the inside of the door to the enclosure:

Step

Action

Mount four

gaskets be-

tween

HEX 70/90/120

and the door.

This is the IP

barrier against

the outdoor

environment

Place HEX

70/90/120 on

the door and

fasten the four

M8 x 170 mm

with washers

Connect power

(48 V DC) to

the unit. The

unit performs a

self-test. If no

alarm starts,

the unit oper-

ates as ex-

pected









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