JUMO 60.4514 User Manual

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Hot Air Thermostats

WTHc series

Special features

•With microswitch

• Device combination consisting of 3 individual devices

• Protection class IP 40 or IP 54

• Tested according to DIN EN 14597

Brief description

Thermostats are used to control and monitor thermal processes.

The thermostats of the WTHc series are suitable for the use in hot air systems acc. to DIN 4794
and consist of 3 separate measuring and switching systems with the following functions: tem-­perature controller TR, temperature monitor TW, and safety temperature limiter STB.

In the event of a malfunction, the STB switches the monitored machine line to an operational
safe status.

Hot air thermostats operate according to the fluid expansion principle. The electrical switching
elements are microswitches.

Data Sheet 604514

WTHc-2280

WTHc-2280-SW

Page 1/5

Switching function

Temperature controller TR and temperature monitor TW

If the temperature on the temperature probe exceeds the setpoint value, the microswitch is ac­tivated by the transmission mechanics and the electrical circuit is opened or closed. If the tem­perature falls below the selected setpoint value (by the amount of the switching differential), the
microswitch is reset to its initial position.

Temperature monitor TW and safety temperature limiter STB

The microswitch can be manually unlocked once the dangerous temperature drops by approx.
10 K. The microswitch can be manually unlocked once the dangerous temperature drops by ap­prox. 10 K.

Self-monitoring for the safety temperature limiter STB

If the measuring system is destroyed (i.e. if the expansion fluid escapes) the pressure in the
membrane of the STB drops and permanently opens the electrical circuit. Unlocking is then no
longer possible. If the probe has cooled down to a temperature below approx. -20 °C the elec­trical circuit opens − however it automatically closes again when the temperature rises.

Approval/approval marks (see "Technical data")

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Data Sheet 604514 Page 2/5

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Technical data

General information

Control ranges and limit values

Control range / limit value Ventilator controller Burner monitor Protection temperature limiter S

TR - system 2
+20 to +80 °C

Capillary and temperature probe

Capillary Material: copper (Cu), material No. 2.0090

Diameter: Ø 1.5 mm

Capillary length including probe: 350 mm with support tube, 1250 mm without support tube

Minimum bending radius: 5 mm

Temperature probe Material: copper (Cu), material No. 2.0090, hard soldered

Diameter: 3 probes Ø 4 mm

a

Probe identification for the version with capillary: ventilator controller TR: red; burner monitor TW: blue

Electrical data

Switching element Ventilator controller

burner monitor

Microswitch with changeover
contact

Maximum contact rating AC 230 V +10 %, 10 (2) A, cos ϕ = 1 (0.6)

DC 230 V +10 %, 0.25 A

Electrical connection Via terminal rail, after removing the case lid, temperature controller and terminal rail are mounted to a PCB

(epoxy resin glass fabrics) with printed diagram

TW - system 2
+70 to +90 °C

Safety temperature limiter STB
System 80
Microswitch with N/C contact and

restart lock

STB - system 80 or 40
limit value 100 °C

a

Safety temperature limiter STB
System 40/U
Microswitch with N/C contact,

restart lock, and additional signal
contact

Operating data

Switching differential Switching function: Ventilator controller TR 14 ± 2K

Burner monitor TW 6 ± 1K

Switching point accuracy Switching function: In the upper third of the scale

At the scale beginning

or limit value

Ventilator controller TR: ± 4K ± 6K

Burner monitor TW: ± 4K ± 4K

Safety temperature limiter STB: +0/-5 K − − −

Ambient temperature
influence

On the switching head:

On the capillary:

0.35 K/K

per meter: 0.07K/K
Operating medium Air
Time constant In air: ≤ 120 s
Over-temperature security At the temperature probe +200 °C
Admissible storage

-50 to +50 °C

temperature
Admissible ambient

Max. +80 °C

temperature for use
Rated position Acc. to DIN 16 257, rated position 0 to rated position 90 (different rated position on request)

Comment To achieve the full response accuracy, only use the device without the probe thermowells. The temperature

probes of the device must be completely submerged into the operating medium to be monitored.

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