Danfoss RT 1AE Pressure Switch Installation Guide

: June 3, 2024
: Danfoss

Table of Contents

RT 1AE Pressure Switch
Technical data
Installation
Safety requirements
Read User Manual Online (PDF format)
Download This Manual (PDF format)

RT 1AE Pressure Switch
Installation Guide

RT 1AE Pressure Switch

Installation guide
Pressure switch
RT 1AE, RT 6AEW, RT 6AEB, RT 6AES, RT 116E, RT 5E, RT 117E, RT 112E, RT 113E, RT 121E, RT 260AE, RT 262AE
Approvals and standards:
ATEX: EN 60079-0:2012+A11:2013; EN 60079-11:2012
IECEx: IEC 60079-0:2011; IEC 60079-11:2011
China Compulsory Certificate, CCC Danfoss RT 1AE Pressure Switch fig
1 Product marking: RT112E, RT113E, RT1AE, RT116E, RT5E, RT117E, RT260AE, RT262AE, RT9E, RT14E, RT101E, RT107E, RT121E, RT123E Ex ia IIC T6…T1 Gb -20 °C ≤ Ta ≤ 65 °C
DEMKO 14 ATEX 1406X, Rev. 3 IECEx ULD 14.0013X
Ui = 29 V
Ii = 0.5 A , Pi = 1 W
Ci = 0.5 nF ,Li = 0.2 μH
Product marking: RT 6AEW, RT 6AEB, RT 6AES Ex ia IIC T6…T1 Gb -20 °C ≤ Ta ≤ 65 °C
DEMKO 14 ATEX 1406X, Rev. 3
IECEx ULD 14.0013X
Ui = 29 V ,Ii = 0.5 A
Pi = 1 W,Ci = 0.5 nF , Li = 0.2 μH

Temperature class	Process temperature limit [°C]
T4 – T1	100
T5	94
T6	79

Technical data

Maximum Working Pressure:

Type| RT 113E| RT 112E| RT 1AE| RT 116E| RT 5E| RT 6AEW
RT 6AEB
RT 6AES| RT 117E| RT 121E| RT 260AE| RT 262AE
---|---|---|---|---|---|---|---|---|---|---
MWP [bar]| 0.4| 7| 22| 22| 22| | 42| 7| 22| 11

28 bar Pe when used as safety equipment acc. to EN12263

Permissible ambient temperature:	-20 — 65 °C
Intrinsically safe specification:	Ui = 29 V Ci = 0.5 nF

li = 0.5 A Li = 0.2 pH
Pi = 1 W
Contact load:| max. 100 mA, 30 V AC / DC
min. 1 mA, 5 V AC / DC
Must be used with a certified Ex is barrier satisfying the input parameters.

Specific conditions of use:
The enclosure fascia has been coated with a layer of stainless steel to prevent the accumulation of electrostatic charge. In order to ensure that there is no accumulation of electrostatic charge on the enclosure, the end user shall ensure that the external metal work of the enclosure is locally bonded to earth. Information on the durability of the coating with regards to use of the equipment is contained within the instruction manual.

Installation

A set of Pg13.5 cable gland is attached to the RT in a separate bag. To ensure IP66 (units with automatic reset) or IP54 (units with external reset) grade of RT enclosure it is necessary to assemble this gland as shown in the fig. 6. If this gland is not used with a cable, a metal blinding should be also assembled.
The RT pressure switch is designed for fitting on the valve panel or the compressor. Use the mounting holes (25). If the unit can be exposend to vibration, it should be mounted on a resilient pad. If pressure pulsations occur in the system at the point where the pressure switch is connected, these should be effectively damped, as for example, by connecting the RT unit to the system via damping coil.
Electrical connection (see fig. 8 and fig. 9)
START = make. STOP = break. DIFF = differential.
Cable diameter: 6 – 14 mm
The earth terminal (38) should be connected to earth.
Wire dimension: min. 0,75 mm²
Adjustment
RT 1AE, RT 116E, RT 5E, RT 117E, RT 112E, RT 113E, RT 121E (see fig. 1, fig. 2 and fig. 8)
Set the pressure switch for minimum actuating pressure (range setting).
Setting is done by rotating the knob (5), at the same time reading the main scale (9).
The differential is set by rotating the differential adjusting nut (19) according to the nomogram concerned (fig. 5 or fig 7).
Maximum actuating pressure is the sum of the pressure setting and the differential.
RT 260AE, RT 262AE
See fig. 4 and fig. 8
Set the required differential pressure with the setting disc (5) while at the same time reading the scale (9).
RT 6AEW, RT 6AEB, RT 6AES (see fig. 3 and fig. 9)
After removing the seal cap (7), set the cut out pressure with the uncovered range spindle while reading the scale (9).

Safety requirements

The refrigeration system must always comply with European Ex installation standard, EN 60079-14, any local directive and legislation as well as any other regulation applying in the area of installation.
RT-E switch must be used only with reliable means of limiting the voltage and current to prevent sparks between the contact surfaces. The equipment to be used for electrical load limiting must always be approved for use in the zone concerned.
Cable and cable entries approved for the application must be used. Cables must not be in contact with sharp edges. The cable must be connected with adequate stress relief in order to prevent that pulling forces can be carried through the cable to the terminal.
In the event of pressure pulsations in the system, where the switch is connected, these must be effectively damped to prevent fatigue failure on the bellows. The cycle frequency of the RT-E switch must be kept as low as possible. The vibration level must be kept as low as possible.
It is recommended to regularly check the function of the RT-E switch.
Only apparatus designed, constructed and released by Danfoss must be used for application concerned. Danfoss can accept no responsibility in case of alterations made on the pressure switches or the use of them against the instructions of Danfoss.
Any overload of the RT switch must be prevented. Overloaded or damaged apparatus must be exchanged.
Only authorised persons, who are certified in installing and maintaining refrigration system may do the installation, maintenance and exchange of the switch.
Use only appropriate tools.
Dispose of the switch in an environmentally-friendly way.
RTE switches must be installed in area where is low risk of mechanical damage.
Components within the equipment can exceed the enclosure temperature by 1K (1°C). When the media temperature exceeds 80°C, it is the responsibility of the user to ensure that the media temperature does not cause a thermal ignition risk on parts between the media and the switch enclosure. Maximum media temperature on pressure switch is 100°C.
Isolation of the intrinsically safe circuit to ground and to the contact mounting screw has been verified through 500VACrms dielectric strength testing, carried out in accordance with IEC 6 0 079 -11:2011 s e c tion 10. 3.
Surface of the front cover is sputtered with stainless steel – avoid abrasion.
Power must be switched off before maintenance and opening the RT-E.

DocuSign Envelope ID: EB2956B9-5F90-426C-9C62-1477FF35F285
EU DECLARATION OF CONFORMITY
Danfoss A/S
Refrigeration & Air Conditioning Controls
declares under our sole responsibility that the
Product category: Pressure switches Type designation(s): RT6AEW, RT6AEB, RT6AES Covered by this declaration is in conformity with the following directive(s), standard(s) or other normative document(s), provided that the product is used in accordance with our instructions.
Explosive or Protective Systems Intended for use in Potentially Explosive Atmospheres, Directive 2014/34/EU
Marking:
Ex is IIC T6…T1 Gb
Tamb. -20C to +65C
EC-Type Examination Certificate: DEMKO 14 ATEX 1406X , Rev. 4
!Notifying Body: UL Demko, No.: 0539 1
Test basis:
EN IEC 60079-0:2018 Explosive atmospheres, Part 0, Equipment-General requirements
EN 60079.11:2012 Explosive atmospheres, Part 11, Equipment Protection by Intrinsic safety T.
Pressure Equipment Directive
2014/68/EU Equipment Category IV
Notifying Body: Module B TOV Rheinland, Notified Body No.: 0035, module D TOV Nord No.: 0045
Test basis: EN 12263:1998 Refrigerating systems and heat pumps – Safety switching devices for limiting the pressure, Requirements and tests.
Conformity assessment: module B (production type) TOV Rheinland certificate No.01 202 969/B-21-0013, module D (quality assurance) TOV Nord certificate No. 202/9120/Z/00468/22/D/000
RoHS Directive 2011/65/EU including amendment 2015/863
EN IEC 63000:2018 Technical documentation for the assessment of electrical and electronics products with respect to the restriction of hazardous substances Danfoss RT 1AE Pressure Switch fig 5 Danfoss only vouches for the correctness of the English version of this declaration. In the event of the declaration being translated into any other language, the translator concerned shall be liable for the correctness of the translation
ID No: 060-9655
Revision No: AG
This doc. is managed by 50060577
UK DECLARATION OF CONFORMITY
Danfoss A/S Refrigeration & Air Conditioning Controls
declares under our sole responsibility that the
Product category: Pressure switches
Type designation(s): RT6AEW, RT6AEB, RT6AESJ
Covered by this declaration is in conformity with the following directive(s), regulation(s), standard(s) or other normative document(s), provided that the product is used in accordance with our instructions.
Equipment and Protective Systems Intended for use in Potentially Explosive Atmospheres Regulations 2016, UKSI 2016, No. 1107
Marking:
Ex is IIC T6…T1 Gb
Tamb. -20C to +65C
UK-Type Examination Certificate: UL21UKEX2021X
Approved Body: UL International (UK) Ltd, No.: 0843
Test basis:
BS EN IEC 60079-0:2018 Explosive atmospheres. Part 0. Equipment-General requirements
BS EN IEC 60079-11:2012 Explosive atmospheres, Part 11, Equipment Protection by Intrinsic safety “i”.
Pressure Equipment (Safety) Regulations 2016
Equipment Category IV Approved Body Module B TOV Rheinland No.: 0035, module D TOV Nord Notified Body No.: 0045
Test basis: BS EN 12263:1998 Refrigerating systems and heat pumps – Safety switching devices for limiting the pressure,
Requirements and tests. Conformity assessment: module B (production type)
TOV Rheinland certificate No. 01 202 969/B-21-0013. module D (quality assurance) TOV Nord certificate No. 202/9120/Z/00468/22/D/000
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 (as amended)
BS EN 63000:2018 Technical documentation for the assessment of electrical and electronics products with respect to the restriction of hazardous substances Danfoss RT 1AE Pressure Switch fig 5 Danfoss only vouches for the correctness of the English version of this declaration. In the event of the declaration being translated into any other language, the translator concerned shall be liable for the correctness of the translation
ID No: 060-9693
Revision No: AB
This doc. is managed by 500B0577
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.