Master AC 24 User manual

AC 24
EN
Installation manual
Rev. 1.0
Rev. 1.0

Declaration of Conformity
Dehumidication
Dantherm S.p.A
Marienlystvej 65
DK - 7800 Skive
Tel.: [phone]
Fax: [phone]
Declaration of following product:
Product name: AC 24
Product no.: 323043
The product is in conformity with the following directives:
2006/42/EC Machinery Directive
2014/35/EU Low Voltage Directive
2014/30/EU EMC Directive
2014/68/EU Pressure Equipment Directive
2011/65/EU RoHS Directive
1907/2006/EC REACH Regulation
- and is manufactured in conformity with the following harmonised standards:
DS/EN ISO 12100-1:2011 Safety of machinery - General principles for design
EN 60204-1 Safety of machinery - Electrical equipment of machines - Part 1
EN 60 335-1:2012 Household and similar electrical appliances - Safety - Part 1:
EN 60 335-2-40:2003 Household and similar electrical appliances - Safety - Part 2-40
DS/EN 61000-6-2:2005 Electromagnetic compatibility (EMC) - Part 6
DS/EN 61000-6-3:2007 Electromagnetic compatibility (EMC) - Part 6
Skive, 20/08-2018
EN
Lars Brodersen
VP Sales
Product manager

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Introduction This is the service manual for the Master AC-24 unit.
The below table of contents gives an overview of the main sections.
This manual is for the unit AC 24
Dantherm Number Code NSN
323043 AC-24-B-305-R9010 *4120-22-631-1514
*) The code is specied on the data plate, which is placed on the control panel.
See the explanation of the syntax code on page 8
WARNING It is the responsibility of the operator to read and understand this service manual and other
information provided and to use the correct operating procedures.
Air conditioners should only be operated by qualied (trained) personnel and the repair of
the cooling circuit and electrical system is to be done only by skilled service people. Failure
to do so can result in personal injury or equipment damage.
Read the entire manual before the initial start-up of the air conditioner. It is important to
know the correct operating procedures for the air conditioner and all safety precautions to
prevent the possibility of property damage and/or personal injury.
Table of main topics This service manual covers the following main topics:
Topic See page:
General information 4
Table of content 5
Product description 6
User’s guide 20
Service guide 29
Technical information 45
!
Overview

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Introduction This section gives the general information about this service manual and about the unit.
Target group • Users of the unit
• Technicians who install and maintain the unit
Part number Part number of this service manual is 097881
Copyright Copying of this service manual, or part of it, is forbidden without prior written permission from
Master.
Reservations Master reserves the right to make changes and improvements to the product and the service
manual at any time without prior notice or obligation.
Recycling The unit is designed to last for many years. When the time comes for the unit to be recycled, the
unit should be recycled according to national regulation to protect the environment.
Quality Management
System
Dantherm S.p.A has implemented a Quality Management System according to EN/ISO9001.
The system is supplemented with an Environmental Management System according to EN/
ISO14001. Both systems are approved by third party and certied, by Bureau Veritas Certication.
During 2005 & 2006 the Management Systems were supplemented with business routines
with regards to safety. These routines meet the requirements stated in the international
standard for Safety Management Systems OHSAS18001.
General information

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Table of content Product description See page
General description 8
Transport of the unit 8
Description of parts 8
Syntax 9
Description of the cooling system 10
Description of the control board 15
Description of room thermostat 17
Description of the high and low pressure switch function 18
Functional Description 19
User´s guide
Preparations 21
Setup 22
Recommended camp conguration 23
Transport of the unit 26
Starting up and shutting down the air conditioner 27
Reset of thermo relay and control circuit fuse 28
Service guide
Preventive maintenance 30
Spare parts 33
Fault nding guide 41
Service agreement 43
Technical information
Technical data 45
Dimensions 46
Wiring diagram, AC 24 47
Wiring diagram reference 49
Table of contents

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Introduction This section will give you a description of the AC 24 and its functionality.
Content The section covers the following topics:
Topic See page
General description 8
Transport of the unit 8
Description of parts 8
Syntax 9
Description of the cooling system 10
Description of the control board 15
Description of room thermostat 17
Description of the high and low pressure switch function 18
Functional Description 19
Product description

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Introduction This section describes the unit as a whole.
The following sections describe the dierent parts of the unit..
General The AC 24 is a portable air conditioner that is made of high quality materials and the production process is
subject to constant quality checking. The instructions in this service manual have been prepared to ensure
that, when followed, this air condi-tioner will provide long and ecient service.
Typical applications The AC 24 is designed primarily to supply cooled air to tents and other types of temporary portable
shelters.
Functionality The function of the unit is based on a cooling circuit and two powerful centrifugal fans. The lower section
contains the evaporator and the evaporator fan which draws warm ambient or recirculated air through the
cold evaporator coil and blows out the cooled air through the discharge.
The upper section of the unit houses the condenser fan and the condenser coil which returns the heat
taken from the cooled air to the surrounding atmosphere.
WARNING Do not cover, block or obstruct the air openings. This may cause malfunction!
Do not operate the product outside the specied temperature range.
See section “Technical data”.
General description

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Illustration This illustration gives an overview of the unit.
Parts Item Description
1 Handlebars for transport ( Accessories)
2 Wheels for easy eld mobility of the unit (Accessories)
3 Control panel with function switch and lamps
4 Mains cable
5 Room thermostat
Transport of the unit.
General description, continued
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Syntax
AC_24_B_305_R9010
AC Air conditioner
24 Nominal performance 24.000BTU/h
B 1ph; 230VAC; 50Hz
C 1ph; 230VAC; 60Hz
305 Duct connection size - mm
RRAL Color code
Introduction All products are named according to a syntax giving information about the specic unit conguration.
Example This example is not necessarily related to the specic unit this manual describes:

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Introduction This section gives a description of the following parts of the AC 24:
• Cabinet • Fans
• Air lters • Mains cable
• Heating coil • Air openings
The following sections in this chapter give separate detailed descriptions of the cooling circuit,
the control board and operation.
For illustration of the single components – please see section “General description”
Cabinet The unit is made of strong construction in sheet metal plates which are galvanized to protect
against corrosion.
The outside paint nish is standard white, RAL 9010.
In the middle plate there is a drain outlet for condensate.
On each side of the unit a plate can be removed to make inspection and service possible.
Inside the unit there is a horizontal partition dividing it into an upper and a lower section.
Fans In both upper and lower sections there is a centrifugal fan with a direct-coupled motor.
Air lters The internal airow enters through a standard washable, easily removable air lter, PPI 15.
The lter is situated behind the return air inlet
The airow will be inuenced by the resistance in lters, hoses and coils, which must be kept
clean to minimize the pressure drop.
Description of parts
Condenser fan
Evaporator fan
The rods keeping the lter
in place are accessible
through the fan opening
without having to remove
the cover.