JUMO ETH-20 Operating Manual

Fitted thermostat
Type series ETH
ETH-20

Operating Manual

1. Introduction / Application
ETH series fitted thermostats are approved as:
safety temperature limiters (STB).
safety temperature monitors STW (STB)
Type examination to:
- DIN EN 14597
- Pressure Equipment Directive 97/23/EC
H
Fitted thermostats of type series ETH comply with VDE 0631.

Safety instructions

Physical and toxicological properties of substances which may escape,
should the system fracture:
End of scale Danger- Fire/
ous explosion hazard
reac-
Ignition Explosion
tions
tempera- limit
ture % v/v
°C
liquid-filled
≥ +200°C
< +200 °C no +355 °C 0.6 - 8
≥ +200 °C ≤ +350 °C
no +490 °C - -
gas-filled
≥ +400 °C ≤ +500 °C
no
H
1
Should the measuring system fracture, the fill fluid may escape. At
present, there is no restrictive statement from the health authorities
concerning danger to health in the event of short-term exposure at low
concentration, for example, should the measuring system fracture.
4. Dimensions
Panel cut-out
ETHf-20
Dimensions
H
Please read these operating instructions before placing the
instrument in service. Keep the manual in a place which is accessible
to all users at all times. Please assist us in improving these operating
instructions where necessary. Your comments will be appreciated.
Telephone +49 661 6003-716
Fax
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All necessary settings and manual changes within the device (if
required) are described in these operating instructions. If any
difficulties should nevertheless arise during startup, please do not
manipulate the unit in any way. By doing so, you could endanger
your rights under the instrument warranty! Please contact the
nearest subsidiary or the head office in such a case.
H
The instruments are maintenance-free. In the event of malfunction,
please return the instrument to the supplier with precise details of
the fault. The staff at our field offices, branches, and agencies are
always available to provide service and advice.
ETH-70
JUMO GmbH & Co. KG
Company address: Moritz-Juchheim-Strasse 1
Delivery address:
Postal address:
Phone:
Fax:
E-mail:
Internet:
JUMO Mess- und Regelgeräte Ges.m.b.H.
Pfarrgasse 48, 1232 Vienna, Austria
Phone:
Fax:
E-mail:
B 60.2010.0
Internet:
JUMO Mess- und Regeltechnik AG
Laubisrütistrasse 70, 8712 Stäfa, Switzerland
Phone:
Fax:
E-mail:
2009-03-06/ 00073781 Internet:
2. Instrument identification / type
declaration

Type designation

ETH . - . . /
ETH
-20
-70
Water Toxicology
contami
nation
irri- danger toxic
tant to health
Nameplate
(reference example)
( 1 ) Type
1
yes yes no
( 2 ) Order code
1
yes yes no
( 3 ) Limit value/max. housing
temperature/contact rating
( 4 ) Manufacturing number/
sales number
( 5 ) Mark of approval/
connection diagram
( 6 ) Year of manufacture
( 7 ) Week of manufacture
Approved probes and pockets
A
ETHf-70
Plain cylindrical probe
E
For code "f" pocket as screw-in
pocket, with screw-in spigot
Form A to DIN 3852/2; pocket
secured with union nut, probe
mounting "C"
+49 661 6003-504
36039 Fulda, Germany
Mackenrodtstrasse 14
36039 Fulda, Germany
36035 Fulda, Germany
+49 661 6003-716
+49 661 6003-504
mail@jumo.net
www.jumo.net
+43 1 610610
+43 1 6106140
info@jumo.at
www.jumo.at
+41 1 928 24 44
+41 1 928 24 48
info@jumo.ch
www.jumo.ch
Fitted thermostat with microswitch
with capillary
safety temperature monitor STW (STB),
with changeover contact
Safety temperature limiter (STB)
with break contact and restart lockout
/au gold-plated snap-action switch contact
/U only with STB. microswitch with normally-closed
contact, restart lockout, and
additional signal contact
U UO
SW
G
ØD
Screw-in pocket with screw-in Pocket as screw-in pocket, with
spigot Form A to DIN 3852/2. screw-in spigot Form "A" to
With fixing screw DIN 3852/2, with fixing screw
B C
Probe mounting "C" Plain cylindrical probe with
with loose coupling, threaded at shoulder and union nut. Shoulder
both ends brazed or welded to capillary
3. Mounting / general information
Capillary / temperature probe / pocket
General information
If the capillary of the surface-mounting thermostat is cut through or becomes
kinked, this could result in permanent device failure!
The minimum bending radius allowed for the capillary is 5 mm.
JUMO pockets must be used when installing the temperature probe, if the approval
for the surface-mounting thermostat is to remain valid.
The temperature probe must be fully immersed in the measurement medium.
When air is the measurement medium, you must choose a process connection
without a pocket.
To ensure the general accuracy of the operating value, the instruments must only
be used with the pockets supplied on delivery (diameter D = 8, 10 mm).
Only a probe of diameter d = 8 mm may be used in pockets of D = 10 mm.
Multiple assignments of pockets are only allowed with 2 or 3 cylindrical probes of
Ø 6 mm and pockets of 15 x 0.75 mm.
If two probes are assigned, the spring clip provided on delivery must be installed in
the pocket.
With pockets U, US, E, ES, and EZS made from St 35.8I/16Mo 3 materials, the
permitted operating period at operating temperatures above 420 °C is limited to
200,000 hours. Compliance with TRD 508 is essential for applications in this range.
Mounting the thermostat head
Any installation position
Mount the thermostat head
On the chassis with 2 M3 screws
( 1 )
( 1 ) screw
( 2 ) panel
( 2 )
US ES
Weld-in pocket For code "f" pocket as weld-in pocket, with
with fixing screw and clamp welding shoulder; pocket secured with union nut,
connection "C".
D Q
( A ) = washer / ( B ) = seal
Plain cylindrical probe, threaded For code "f" double threaded
connector brazed or welded to coupling for subsequent capillary
capillary mounting. Probe temperature
max. +200 °C
V
For code "f" clamping gland for
subsequent capillary mounting.
Probe temperature max. +200 °C