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

5
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.
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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.
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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.
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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

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Mounting and installation
Introduction This section will guide you through the mounting and installation of the HEX 30.
Caution! •Only trained and certified technicians are allowed to replace parts
•Switch of the DC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
Before you start Make sure you have the following available before you start the installation:
•8 M6 nuts
•Cable with Sub-D 9 pole plug
Mounting Follow this procedure to mount the unit to the inside of the enclosure door:
Step Action
1 Mount 8 M6 nuts on the mounting
door without fastening them
2 Mount a gasket between the HEX
30 and the door; this is the IP bar-
rier against the outdoor environ-
ment
3 Place the HEX 30 on the door and
fasten the nuts
4 Connect power (48 V DC) to the
unit
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Service guide
Overview
Introduction This section gives all relevant information about servicing, spare parts and faultfinding.
Serial numbers All requests for information, service or parts should include serial number.
Product model and serial numbers are available from the nameplate.
Contents This section covers the following topics:
Topic See page
Preventive maintenance next page
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

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Preventive maintenance
Introduction To keep the heat exchanger fit to meet the specifications, preventive maintenance has
to be carried out.
The unit needs preventive maintenance with specific intervals to avoid breakdown or
inefficient operation and to maximize the lifetime. It is important to notice that interval
between maintenance can vary depending on the specific environment.
The following parts need preventive maintenance:
•Heat exchanger
•Fans
The maintenance instructions are listed later in this section.
Caution •Only trained and certified technicians are allowed to service the fans
•Switch of both the DC and AC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
Intervals The recommended preventive maintenance intervals should not exceed 6 months.
Preventive main-
tenance Please follow this procedure to carry out the preventive maintenance:
Step Action
1 Clean the fans, either vacuum clean or use compressed air with caution
2 Check the fans and the fan blades for cracks and abnormal noise – ex-
change if necessary
Clean the fan blades with compressed air or with a brush. Each blade has to
be so clean that the fan stays balanced. Take care not to remove the balanc-
ing pieces attached to the fan blades.
3 Clean the cross heat exchanger:
If the cell is contaminated clean with a brush and a vacuum cleaner
4 Switch on the power again.
In case of an alarm signal, please see section “Fault finding guide”, page 21
Drip tray Make sure that the water outlet is not clogged.
Condition for war-
ranty The factory warranty is only valid if documented preventive maintenance has been car-
ried out with an interval of maximum 6 months. The documentation could be in form of
a written log.

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Spare part list
Available spare parts for HEX 30:
Illustration
c
d
f
e
List of spare parts including spare part numbers:
List
Pos. Dantherm no. Description
1 061589 Complete unit
2 061535 Internal fan
3 061533 External fan
4 061541 Control board

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How to replace the heat exchanger
This instruction guides you through the exchange of the HEX 30 unit.
Introduction
Caution! •Only trained and certified technicians are allowed to replace parts
•Switch of the DC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
In many cases it is more effective to replace the whole unit in stead of just replacing the
fans etc. This should be estimated from case to case.
When to replace it
Before you start to replace the fan, make sure that you have the following ready:
Before you start
•A torx 20 screwdriver
Follow this procedure to replace the unit:
Mounting
Step Action
1 Disconnect all power to the
unit by removing the plug
from the front
2 Loosen the 8 nuts and lift of
the unit
3 Place the new HEX 30 on the
8 nuts and fasten the nuts
again
4 Reconnect the power plug
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How to replace the internal fan
The internal fan only needs to be replaced when it is faulty or as a part of a long time
replacement plan, e.g. after approximately 5 years.
When to replace
Caution! •Only trained and certified technicians are allowed to replace parts
•Switch of the DC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
Make sure you have the following tools available before you start:
Tools
•Torx 25 screw driver
This drawing illustrates the internal fan and where
the fan is placed in the unit:
Illustration
Continued overleaf

17
How to replace the internal fan, continued
Follow these steps to replace the internal fan:
Procedure
Step Action
1 Disconnect all power to the unit by removing the plug from the front
2 Remove the 4 torx 20 screws that
holds the front cover plate and re-
move the front cover plate
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3 Loosen (do not unscrew) the 4 torx
25 screws that hold the fan and lift
off the fan
4 Take out the fan
5 Disconnect the 4-way multi plug from the fan
6 Mount a new internal fan by following step 2 to 5 reversed and in opposite
order
7 Connect the power

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How to replace the external fan
The external fan only needs to be replaced when they are faulty or as a part of a long
time replacement plan, e.g. after approximately 5 years.
When to replace
Caution! •Only trained and certified technicians are allowed to replace parts
•Switch of the DC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
Make sure you have the following tools available before you start:
Tools
•Torx 20 screwdriver
This drawing illustrates the external fan
and where the fan is placed in the unit:
Illustration
Continued overleaf

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How to replace the external fan, continued
Follow these steps to replace the external fan:
Procedure
Step Action
1 Disconnect all power to the unit by removing the plug from the front
2 Remove the 4 torx 20 screws
that holds the fan assembly
3 Disconnect the 4-way multi plug from the fan assembly
4 Reconnect the multi plug to the new fan assembly
5 Mount the new fan with the 4 torx 20 screws
6 Connect the power
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How to replace the control panel
The control board only needs to be replaced when it is defect.
When to replace
Caution! •Only trained and certified technicians are allowed to replace parts
•Switch of the DC supply before working on the unit
•Make sure that all work has been performed before switching on the power again
Make sure you have the following tools available before you start:
Before you start
•Torx 20 screw driver
•Straight slot screw driver for power plug
This drawing illustrates the control board
and where it is placed in the unit:
Illustration
Follow these steps to replace the control board:
Procedure
Step Action
1 Disconnect all power to the unit by removing the plug from the front
2 Remove the 4 torx 20 screws to remove the controller
3 Pull out carefully the controller and disconnect the two cable plugs
4 Fit the two plugs to the new controller and tighten it with the 4 screws
5 Connect the power