Dantherm RBS 800 User manual

RBS 800
EN
N0. 910002 • rev. 2.0 • 01.12.2004

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

3
Introduction
Overview
Introduction This is the service manual for the DANTHERM RBS 800.
The below table of content gives you an overview of the main sections. Please see the
complete Table of contents on page 4 for further information about the sections.
Serial number This manual covers units produced after the below date, which is to be found in the first
6 digits in the serial number on the unit type plate (yy-mm-dd):
041201
Contents This service manual covers the following main topics:
Topic See page
Introduction this page
Table of contents, complete
General information next page 6
Unwrapping, mounting and installation 21
Service guide 23
Technical information 43
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4
Table of contents
Introduction This is the complete table of contents covering all sections in this service manual.
Each main section will begin with an introduction including a separate table of contents
covering the exact section.
Contents This service manual covers the following topics:
Topic See page
Introduction next page
Table of contents 4
General information 6
Product and functional description 7
General description 8
Fan 9
Damper 10
Heating 11
Set points 12
Test facility 13
Comfort temperature during visit by technician 14
Communications options 15
Description of indicators, plugs and switches 16
Unwrapping, mounting and installation 21
Service guide 23
Preventative maintenance 24
Spare parts 26
How to replace the filter 27
How to replace the fan 29
How to replace the control panel 31
How to replace the heating element 33
Continued overleaf

5
Table of contents, continued
Contents, continued
Topic See page
How to replace the damper motor 35
How to replace the temperature sensors 37
Fault finding guide 38
Hotline 40
Recycling of the unit 41
Service agreement 42
Technical information 43
Technical data 44
Dimensions 46
Resistance in temperature sensors 47
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6
General information
Introduction This section gives you the general information about the unit and this service manual.
Manual, part
number Part number of this service manual is 910002.
Target group This service manual is intended for technical staff who are to install the climate control
unit, carry out preventative maintenance, and replace defective parts.
Copyright Copying of this service manual, or part of it, is not allowed without written permission
from Dantherm A/S.
Reservations Dantherm A/S reserves the right to make changes and improvements of the product
and the service manual at any time without prior notice or obligation.
CE
Declaration of
conformity
Dantherm A/S, Marienlystvej 65, DK-7800 Skive hereby solemnly declares that the
RBS 800 conforms with the following directives:
•97/37/EEC Machine directive
•89/336/EEC EMC directive
and has been manufactured in accordance with the following norms:
•EN 292 Machine safety
•EN 61000 EMC
December 2001
Per Albæk - Managing Director

7
Product and functional description
Overview
Introduction This section describes the control strategy for RBS 800.
Contents The section contains the following topics:
Topic See page
General description next page
Fan 9
Damper 10
Heating 11
Set points 12
Test facility 13
Comfort temperature during visit by technician 14
Communications options 15
Description of indicators, plugs and switches 16
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8
General description
Introduction The RBS 800 is a microprocessor-controlled free cooling unit designed for the
regulation of the temperature in an electronics room.
The unit can operate in temperatures from ÷ 40 °C to + 55 °C.
The RBS 800 is intended in particular for positioning indoors, and its slim line design
allows it to be installed in most rooms and containers.
Active parts The active parts controlled by the control panel are:
•Heating element
•Damper motor
•Fan
Terms The following terms are used in this manual:
•Outdoor air temperature: the temperature of the air outside the room or container.
This is the air that can be used for cooling purposes
•Supply air temperature: the temperature of the air blown into the room
•Return air temperature: the temperature of the air extracted from the room or
container
Signal lights On the front of the control panel, there are five LEDs that indicate the current status of
the system:
Learn more about the LEDs in section ”Description of indicators, plugs and switches”,
page 16.

9
Fan
The function of
the fan The fan runs continually to circulate the air inside the room. Regulation of the fan
revolutions is defined by the temperature of the return air.
•Below 25 °C
The fan funs at minimum revolutions
•Over 25 °C
The fan revolutions will increase
•At 30 °C
The fan will reach its maximum speed of revolution
If a smoke alarm (accessory) is triggered, the fan will stop immediately, irrespective of
the temperature.
The fan is monitored with the assistance of a pulse generator fitted in the fan.
Back-up-function RBS 800 can also be used as back-up unit for other cooling units that are responsible
of the primary cooling.
In back-up mode will both the fan and the damper be hindered in operation because of
the set point.
The set point can be set between 25 °C and 35 °C. The settings for back-up condition
has to be set on the control board, where dip switch no. 6 must be put on ON, see more
about this in section ”Communications options”, page 15.
Return air temperature
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Damper
Damper function Primary temperature regulation is carried out using a flow of outdoor air controlled by a
damper.
The supply air consists of a mixture of the air from the room and from outdoors. The
opening and closing of the damper is determined by a sensor that measures the
temperature of the supply air.
The damper automatically adjusts against closed or open to reach supply air
temperature at 21-22 °C. Damper mode is conditioned by the fact that the set point on
the control panel has been reached. This set point relates to the return air temperature
and can be set from 25 °C to 35 °C. (Learn more about this in section ”Set points”,
page 12.
A signal from a moisture meter (accessory) will cause the damper to close if there is an
AC current in the unit.
A signal from a smoke detector (accessory) will cause the damper to close immediately.
If the heating element is activated, the damper will be closed.
As the damper is not a spring-return damper, it will remain in position in the event of a
power failure.
Supply air temperature