Dantherm HEX 30 User manual

HEX 30
Service manual
EN
No. 061629 • rev. 1.0 • 25.02.2008

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

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061629 • Version 1.0 • 25.02.2009
Introduction
Overview
Introduction This is the service manual for the Dantherm Air Handling HEX 30 unit.
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:
xxxxxx1131132
Table of contents This service manual covers the following main topics:
Topic See page
Table of content, complete next page
General information 5
Product description 6
Mounting and installation 11
Service guide 12
Technical information 23
Index 26

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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 3
Table of content 4
General information 5
Product description 6
Description of the HEX 30 and its parts 7
Control board 8
Functional description 9
Mounting and installation 11
Service guide 12
Preventive maintenance 13
Spare part list 14
How to replace the heat exchanger 15
How to replace the internal fan 16
How to replace the external fan 18
How to replace the control panel 20
Fault finding guide 21
Service agreement 22
Technical information 23
Technical data and dimensions 24
Wiring diagram 25
Index 26

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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 061629.
Target group The target group for this service manual are the technicians who install and maintain
the HEX 30 unit as well as the users of the unit.
Copyright 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.
Dantherm Air Handling A/S, Marienlystvej 65, DK-7800 Skive hereby declare that the
units mentioned below:
EC-Declaration of
Conformity 352909 HEX 30
are in conformity with the following directives:
98/37/EEC Directive on the safety of machines
73/23/EEC Low Voltage Directive
2004/108/EF EU EMC Directive (December 2004)
94/62/EC Packaging Directive
- and are manufactured in conformity with the following harmonized standards:
EN 12100 Machine safety
EN 60 335-1 Low Voltage
EN 60 335-2 Low Voltage
EN 61 000-6-2 Immunity: 2001
EN 61 000-6-3 Emission: 2001
Skive, 14.01.2009
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.
061629 • Version 1.0 • 25.02.2009

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Product description
Overview
Introduction This section will give you a description of the HEX 30 and its functionality.
Content This section covers the following topics:
Topic See page
Description of the HEX 30 and its parts next page
Control board 8
Functional description 9

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Description of the HEX 30 and its parts
Usage of HEX 30 The HEX 30 is used for ventilation of enclosures with electronics.
The unit cools down the air in the enclosure by letting the cold outdoor air cool down
the air flow from inside the enclosure. The cooling takes place in a heat exchanger.
Illustration, inter-
nal This drawing illustrates the unit with its dif-
ferent parts, visible from the internal:
c
e
f
d
g
Parts This table gives an overview of the main parts of the unit:
No. Part No. Part
cInternal fan fExternal fan
dControl board with
temperature sensor gDrain hole (at the back of the unit)
eHeat exchanger - -
Cabinet The cabinet is made of made of alu zinc sheet steel.
Heat exchanger The heat exchanger ensures that outdoor air is used to cool down warm internal air,
when both air flows passes each other.
Fans There are two fans in the unit. The purpose of the fans is described below.
Internal fan
The internal fan draws air from the enclosure through the heat exchanger where the
heat is removed.
External fan
The external fan draws fresh outdoor air through the heat exchanger to cool down the
internal air.
061629 • Version 1.0 • 25.02.2009
Drain The drain is placed in the bottom of the cabinet, where water is let out of the unit.

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Control board
The HEX 30 is controlled via a controller that controls the speed
of the fans.
Control system
The key features of the controller are:
•Onboard temperature sensor (NTC type)
•Microprocessor based control in accordance with prese-
lected strategy
•Minor and major alarm output
•Polarity protection
•Input voltage ÷ 40 V DC to -60 V DC
•Both alarm outputs are “Normally closed” (NC)
•Minor alarm is high temperature inside the cabinet >60 °C
•Major alarm is when the internal, external or the tempera-
ture sensor fails
Part Function
RS 232 To be used for factory testing or to get further information from
the controller
Alarm LED Gives signal about alarms:
•Flashing = minor alarm (high temperature)
•Constant = major alarm (fan or sensor failure)
Both alarms can be monitored (potential free contact) on the
power/alarm plug.
See more about fault finding in section “Fault finding guide”,
page 21
Sub-D 9 pin, male Power and alarm plug
Pin designation:
1 N/C
2 + 48 V DC
3 + 48 V DC
4 Minor alarm +
5 Major alarm +
6 0 V DC
7 0 V DC
8 Minor alarm ÷
9 Major alarm ÷

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Functional description
Important The ventilation system should operate continuously!
It is not advisable to stop ventilation.
Function The HEX 30 is designed to control the internal temperature of a universal shelter or
room with respect to climate, moist and airborne.
The HEX 30 removes excess heat from electronic equipment and is especially suited in
applications where the equipment requires to be maintained within defined temperature
limits to achieve optimum performance and to maximize component lifetime.
Two separate air
flows The two air flows (internal/external) are to-
tally separated. The external air is only
used to cool down the internal air via the
heat exchanger. The air flows are never
mixed.
This illustrates the air flow of the HEX 30:
Internal air flow The warm internal air is sucked from the enclosure into the internal fan at the top of the
HEX 30 and let through the heat exchanger, where it is cooled down.
After the cooling in the heat exchanger, the air is let back into the enclosure.
External air flow The cold external air is sucked into the external fan at the bottom of the HEX 30 and let
through the heat exchanger, where it is cooling down the internal air.
After having passed through the heat exchanger, the air is let back to the external envi-
ronment at the top of the unit.
061629 • Version 1.0 • 25.02.2009
Control strategy The control board controls the fans according to the temperature of air in the top cabi-
net.
The higher temperature the higher fan speed.
Continued overleaf

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Functional description, continued
Internal fan strat-
egy See the speed of the internal fan according to different temperatures on this drawing:
Top temperature inside the cabine
t
External fan strat-
egy See the speed of the external fan according to different temperatures on this drawing:
Top temperature inside the cabine
t