Danfoss Differential thermostat RT Data sheet

Data sheet

Thermostat, Differential thermostat

RT

An RT thermostat is fitted with

a single-pole changeover switch.

The position of the contacts depends on the bulb temperature and the set scale value.

The RT series includes thermostats for general applications within industrial and marine refrigeration.

The RT series also includes differential thermostats, thermostats for neutral zone regulation and special thermostats with gold-plated contact surface for PLC applications.

Features	•	Waterproof versions, enclosure IP66	• Suitable for alternating and direct current
	•	Wide regulating range	•	Interchangeable contact system
	• Wide range of units for industrial		• Special versions for PLC applications
		and marine applications	•	Safety Integrity Level:
				SIL 2 according to IEC 61508

© Danfoss | DCS (az) | 2017.09

DKRCC.PD.CB0.A9.02 | 520H12296 | 1

Data sheet | Thermostat, Differential thermostat, type RT

Approvals

<![if ! IE]> <![endif]>RT 2

<![if ! IE]> <![endif]>RT 3

<![if ! IE]> <![endif]>RT 4

<![if ! IE]> <![endif]>RT 7

<![if ! IE]> <![endif]>RT 8

<![if ! IE]> <![endif]>RT 8L

<![if ! IE]> <![endif]>RT 9

<![if ! IE]> <![endif]>RT 11

<![if ! IE]> <![endif]>RT 12

<![if ! IE]> <![endif]>RT 13

<![if ! IE]> <![endif]>RT 14

<![if ! IE]> <![endif]>RT 14L

<![if ! IE]> <![endif]>RT 15

<![if ! IE]> <![endif]>RT 16L

<![if ! IE]> <![endif]>RT 17

<![if ! IE]> <![endif]>RT 23

<![if ! IE]> <![endif]>RT 24

<![if ! IE]> <![endif]>RT 34

<![if ! IE]> <![endif]>RT 101

<![if ! IE]> <![endif]>RT 102

<![if ! IE]> <![endif]>RT 107

<![if ! IE]> <![endif]>RT 140

<![if ! IE]> <![endif]>RT 140L

<![if ! IE]> <![endif]>RT 270

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Lloyd’s Reg. of Shipping, LR

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Germanischer Lloyd, GL

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Det Norske Veritas, DNV

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Bureau Veritas, BV

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Russian Maritime Register

of Shipping, RMRS

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Nippon Kaiji Kyokai, NKK

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Korean Register of Shipping, KRS

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Conformity with EN 60730-2-1 to 9

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CE mark according to EN 60947-4, -5

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China Compulsory Certificate, CCC

Technical data

Cable connection

Pg 13.5. Cable diameter 6 – 14 mm.

Enclosure

IP66 acc. to EN 60529 / IEC 60529,

except for versions with ext. reset which are IP54.

Permissible ambient temperature

-50 – 70 °C for thermostat housing.

Switches

See “Ordering switches”

Properties according to EN 60947

Wire dimensions
solid / stranded	0.2 – 2.5 mm2
flexible, w / out ferrules	0.2 – 2.5 mm2
flexible, with ferrules	0.2 – 1.5 mm2
Tightening torque	max. 1.5 Nm
Rated impulse voltage	4 kV
Pollution degree	3
Short circuit protection, fuse	10 A
Insulation	400 V
Ingress Protection	IP54, IP66

© Danfoss | DCS (az) | 2017.09

DKRCC.PD.CB0.A9.02 | 520H12296 | 2

Data sheet | Thermostat, Differential thermostat, type RT

Overview

[°C]

Range

Type

-50

0

50

100

150

200

250

300

[°C]

Vapour-charged with remote bulb (bulb coldest)

-45 – -15

RT 9

-30 – 0

RT 13

-25 – 15

RT 3

-25 – 15

RT 2, RT 7

-20 – 12

RT 8

-5 – 10

RT 12

-5 – 30

RT 14

Adsorption-charged with remote bulb

5 – 22

RT 23

(bulb warmest or coldest)

8 – 32

RT 15

15 – 34

RT 24

15 – 45

RT 140

25 – 90

RT 101, RT 102

Partial charge with remote bulb (bulb warmest)

70 – 150

RT 107

-50 – -15

RT 17

Vapour-charged with coiled capillary tube sensor (room thermostats)

-30 – 0

RT 11

-5 – 30

RT 4

Adsorption-charged with coiled capillary tube sensor (room thermostats)

-25 – 15

RT 34

-20 – 12

RT 8L

Adsorption-charged dead zone thermostats with remote bulb (bulb warmest or coldest)

-5 – 30

RT 14L

15 – 45

RT 140L

Vapour-charged dead zone thermostat (room thermostat)

0 – 38

RT 16L

Adsorption-charged differential thermostats with remote bulb (bulb warmest or coldest)

-30 – 40

RT 270

-50

0

50

100

150

200

250

300

© Danfoss | DCS (az) | 2017.09

DKRCC.PD.CB0.A9.02 | 520H12296 | 3

Data sheet | Thermostat, Differential thermostat, type RT

Ordering

Thermostats

Differential ∆t

Max.

Capillary

Regulation

At min.

At max.

bulb

Bulb

tube

Charge

Type

range

range

range

Reset

temp.

Code no.

type

length

setting

setting

[°C]

[K]

[K]

[°C]

[m]

RT 9

A

-45 – 15

2.2 – 10.0

1.0 – 4.5

auto

150

2

017-506666

RT 3

A

-25 – 15

2.8 – 10.0

1.0 – 4.0

auto

150

2

017-501466

Vapour 1)

RT 17

B

-50 – -15

2.2 – 7.0

1.5 – 5.0

auto

100

–

017-511766

RT 11

B

-30 – 0

1.5 – 6.0

1.0 – 3.0

auto

66

–

017-508366

RT 4

B

-5 – 30

1.5 – 7.0

1.2 – 4.0

auto

75

–

017-503666

017-503766 4)

RT 13

A

-30 – 0

1.5 – 6.0

1.0 – 3.0

auto

150

2

017-509766

RT 2

A

-25 – 15

5.0 – 18.0

6.0 – 20.0

auto

150

2

017-500866

RT 8

A

-20 – 12

1.5 – 7.0

1.5 – 7.0

auto

145

2

017-506366

RT 12

A

-5 – 10

1.0 – 3.5

1.0 – 3.0

auto

65

2

017-508966

RT 23

A

5 – 22

1.1 – 3.5

1.0 – 3.0

auto

85

2

017-527866

RT 15

A

8 – 32

1.6 – 8.0

1.6 – 8.0

auto

150

2

017-511566

Adsorption 2)

RT 24

A

15 – 34

1.4 – 4.0

1.4 – 3.5

auto

105

2

017-528566

RT 140

C

15 – 45

1.8 – 8.0

2.5 – 11.0

auto

240

2

017-523666

RT 102

D

25 – 90

2.4 – 10.0

3.5 – 20.0

auto

300

2

017-514766

RT 34

B

-25 – 15

2.0 – 10.0

2.0 – 12.0

auto

100

–

017-511866

RT 7

A

-25 – 15

2.0 – 10.0

2.5 – 14.0

auto

150

2

017-505366

RT 14

A

-5 – 30

2.0 – 8.0

2.0 – 10.0

auto

150

2

017-509966

RT 101

A

25 – 90

2.4 – 10.0

3.5 – 20.0

auto

300

2

017-500366

Partial 3)

RT 107

A

70 – 150

6.0 – 25.0

1.8 – 8.0

auto

215

2

017-513566

1) The sensor must be located colder than thermostat housing and capillary tube. 2) The sensor can be located warmer or colder than thermostat housing.

3) The sensor must be located warmer than thermostat housing and capillary tube. 4) With built-in heating coil − reduces the thermal differential.

Thermostats with adjustable dead zone

						Neutral zone NZ		Max.	Capillary
				Regulation	Mechanical	At min.	At max.
			Bulb					bulb	tube
	Charge	Type		range	differential	range	range			Code no.
			type					temp.	length
						setting	setting
				[°C]	[K]	[K]	[K]	[°C]	[m]
	Vapour	RT 16L	B	0 – 38	1.5 – 0.7	1.5 – 5.0	0.7 – 1.9	100	–	017L002466
		RT 8L	A	-20 – 12	1.5	1.5 – 4.4	1.5 – 4.9	145	2	017L003066
	Adsorption	RT 14L	A	-5 – 30	1.5	1.5 – 5.0	1.5 – 5.0	150	2	017L003466
		RT 140L	C	15 – 45	1.8 – 2.0	1.8 – 4.5	2.0 – 5.0	240	2	017L003166
		RT 101L	A	25 – 90	2.5 – 3.5	2.5 – 7.0	3.5 – 12.5	300	2	017L006266

© Danfoss | DCS (az) | 2017.09

DKRCC.PD.CB0.A9.02 | 520H12296 | 4

Data sheet | Thermostat, Differential thermostat, type RT

Ordering

Continued

Type of bulb / sensor

A

B

C

D

Cylindrical remote sensor	Room sensor	Duct sensor	Capillary tube sensor
Special versions		When ordering, please state:
RT can be supplied with special switches.		1.  Type
See next page.		2.  Code no. of standard unit
		3.  Code no. of special switch

Switches

Version	Symbol	Description	Contact rating	Reset	Code no.
		Single-pole changeover switch
		with terminal board proof against
Standard		leakage current.		Auto	017-403066
		Fitted in all standard
		versions of type RT.
		Snap action changeover contacts.
	SPDT
		For manual reset of unit after	Alternating current
Man.		contact changeover on rising	Ohmic:	Max.	017-404266
reset		temperature.
		For units with reset facility.	AC 1 = 10 A, 400 V
	SPDT		Inductive:
			AC 3 = 4 A, 400 V
		For manual reset of unit after	AC 15 = 3 A, 400 V
Man.		contact changeover on falling	Dir. current:	Min.	017-404166
reset		temperature.
			DC 13 = 12 W, 220 V
		For units with reset facility.
	SPDT
					Available only
		Single-pole changeover			as a component
Neutral		switch with dead zone		–	part of RT
zone		and terminal board proof			controls with
		against leakage current.			adjustable
					neutral zone
	SPDT

© Danfoss | DCS (az) | 2017.09

DKRCC.PD.CB0.A9.02 | 520H12296 | 5