Danfoss RT 9E, RT 14E, RT 101E, RT 107E, RT 123E Installation guide

Installation guide

089

Thermostat RT 9E, RT 14E, RT 101E, RT 107E, RT 123E

Approvals and standards:

ATEX: EN 60079-0:2012+A11:2013; EN 60079-11:2012; IECEx: IEC 60079-0:2011;

017R9518

Fig. 1

IEC 6 00 79 -11:2011 China Compulsory Certiﬁcate, CCC

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.

Fig. 2

017R9518

[°C]

-45

-35

-25

-15

A: Range setting B: Diﬀential obtained C: Diﬀerential setting

Fig. 3

[°C]

-5

RT 14E

[°C]

RT 101ERT 9E

[°C]

RT 107E RT 123E

[°C]

Fig. 4 Fig. 5

Імпортер:ТОВ з іі "Данфосс ТОВ" 04080, Київ 80, п/с 168, Україна

AN179486440929en-001101 | 1

Info for UK customers only: Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB

Product marking Technical data

0539 II2G

Ex ia IIC T6...T1 Gb -20 °C ≤ Ta ≤ 65 °C

DEMKO 14 ATEX 1406X

IECE x ULD 14.0013X

Ui = 29 V Ii = 0.5 A Pi = 1 W

Ci = 0.5 nF Li = 0.2 μH

Typ e

RT 9E -45 – -15 150

RT 14E -5 – 30 150

RT 101E 25 – 90 300

RT 107E 70 – 150 215

RT 123E 150 – 250 300

Range

[°C]

Max. permissible bulb temperature

[°C]

Permissible ambient temperature

Temperature

class

T1 T2 T3 T4 T5 T6

Process temperature

limit [°C]

300 289 194 129

94 79

Intrinsically safe speciﬁcation

Contact load

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. 2. If this gland is not used with a cable, a metal blinding should be also assembled. RT units can be ﬁtted in any position. Use the mounting holes (25). With outdoor installation, the unit should be protected against rainfall. The bulb should be ﬁxed to the wall by means of a bulb holding bracket (26). If it is desired to install the bulb in a water or brine tank, this can be done by using either a capillary stuﬃng box (31) or a bulb pocket (30). If bulb pocket is to be used, for correct bulb ﬁtting see ﬁg. 4.

Electrical connection

See ﬁg. 5.

START = make. STOP = break. DIFF. = diﬀerential. Cable diameter: 6 – 14 mm. The earth terminal (38) should be connected to earth. Wire dimension: min. 0,75mm

Adjustment

Set the thermostat for minimum actuating temperature (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. 3). Maximum actuating temperature is the sum of the temperature setting and the diﬀerential. Example: An RT 123E is required to regulate the temperature in a drying oven. Max. temperature 188 °C, min. temperature 180 °C, diﬀerential 188 °C - 180 °C = 8 °C.

1. Set the thermostat on 180 °C with the knob (5).

2. Set the diﬀerential adjusting nut (19) on number 3 which can be found by reading oﬀ the nomogram for the RT 123E in ﬁg. 3.

In general, turning the knob automatically moves both the maximum and minimum actuating temperatures (break and make) up or down because of the ﬁxed diﬀerential. On the other hand, turning the diﬀerential adjusting nut only, alters the maximum actuating temperature.

-20 – 65 °C

Ui = 29 V li = 0.5 A Pi = 1 W Ci = 0.5 nF Li = 0.2 μH

max. 100 mA, 30 V AC / DC

min. 1 mA, 5 V AC / DC

Must be used with a certiﬁed Ex ia barrier satisfying the input parameters.

Safety requirements

1. 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.

2. RT-E temperature control 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 be certiﬁed for gas group IIC. Also RT-E thermostat must be installed as a part of IIC electrical installation.

3. 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.

4. The cycle frequency of the RT-E switch must be kept as low as possible level must be kept as low as possible.

5. It is recommended to regularly check the function of the RT-E switch.

6. 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 thermostats or the use of them against the instructions of Danfoss.

7. Any overload of the RT switch must be prevented. Overloaded or damaged apparatus must be exchanged.

8. Only authorised persons, who are certiﬁed in installing and

and exchange of the switch. Use only appropriate tools.

9. Dispose of the switch in an environmentally-friendly way.

10. RTE switches must be installed in area where is low risk of

mechanical damage.

11. Components within the equipment can exceed the enclosure tem-

12. Isolation of the intrinsically safe circuit to ground and to the contact

13. Surface of the front cover is sputtered with stainless steel - avoid

abrasion.

14. Power must be switched oﬀ before maintenance and opening the RT-E.

to prevent fatique failure on the bellows. The vibration

maintaining refrigration system may do the installation, maintenance

perature 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 temperature switch with 2m or longer capillary tube is 300 °C.

mounting screw has been veriﬁed through 500 VACrms dielectric strength testing, carried out in accordance with IEC 60079-11:2011 section 10. 3.

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