Panel-mounting
thermostats
Series EMf-80
B 60.2026
Operating Instructions
11.00 / 00073776
Please read these Operating Instructions before commissioning the instrument. Keep the
operating instructions in a place which is accessible to all users at all times. Please assist
us to improve these operating instructions where necessary. Your suggestions will be welcome.
Phone in Germany (06 61) 6003-716
abroad (+49) 661 6003-0
Fax in Germany (06 61) 6003-504
abroad (+49) 661 6003-607
All necessary settings and, where required, alterations inside the instrument are described
in these operating instructions. If, however, any difficulties should arise during commissioning, you are asked not to carry out any unauthorized manipulations on the unit. You
could endanger your rights under the instrument warranty! Please contact the nearest
subsidiary or the main factory in such a case.
Contents
1 Introduction 5
1.1 Typographical conventions
1.1.1 Warning signs ................................................................................................. 5
1.1.2 Note signs ...................................................................................................... 5
1.2 Application
1.3 Marking
1.4 Safety notes
....................................................................................................
.........................................................................................................
..................................................................................................
.........................................................................
2 Identifying the instrument 7
2.1 Nameplate
2.2 Type designation
2.2.1 Extra codes .................................................................................................... 7
.....................................................................................................
..........................................................................................
3 Mounting 8
3.1 Dimensions
3.2 Securing the panel-mounting thermostat
3.2.1 Central fixing .................................................................................................. 9
3.2.2 Fixing bracket ................................................................................................. 9
...................................................................................................
..................................................
5
6
6
6
7
7
8
9
3.3 Capillary/ temperature probe/ pocket
3.3.1 General ......................................................................................................... 10
3.3.2 Approved probe forms and protection tubes (pockets) ............................... 11
3.4 Permissible operating conditions at the pocket
3.4.1 Pockets U, US and UH ................................................................................. 12
3.5 Mounting the probe
....................................................................................
.....................................................
.....................................
10
12
13
4 Installation 14
4.1 Regulations and notes
4.2 Electrical connection
4.3 Connection diagrams
...............................................................................
.................................................................................
.................................................................................
14
15
15
5 Resetting the STB thermostat 16
5.1 Resetting the STB
5.1.1 Version for central fixing ............................................................................... 16
5.1.2 Version with fixing bracket ........................................................................... 17
......................................................................................
16
Contents
5.2 Self-monitoring
5.2.1 Response to a break of the measuring system ............................................ 17
5.2.2 Response to low temperature ...................................................................... 17
...........................................................................................
17
6 Instrument description 18
6.1 Technical data
.............................................................................................
18
1.1 Typographical conventions
1.1.1 Warning signs
1 Introduction
V
Danger
This sign is used where there may be
are disregarded or not followed accurately.
Caution
A
1.1.2 Note signs
H
v
1
abc
This sign is used where there may be
tions are disregarded or not followed accurately.
Note
This sign is used to draw your
Reference
This sign refers to
Footnote
danger to personnel
damage to equipment
special attention
additional information
if the instructions
if the instruc-
to a remark.
in other chapters or sections.
✱
Footnotes are comments that
consist of two parts:
1) The marking in the text, arranged as continuous superscript numbers.
2) The footnote text, at the bottom of the page, in a smaller typeface than the
main text, and preceded by a superscript number.
Action
This sign marks the description of a
The individual steps are indicated by an asterisk, e.g.
Unscrew crosspoint screw
✱
Remove cover
✱
refer to specific parts
required action
of the text. Footnotes
.
5
1 Introduction
1.2 Application
JUMO panel-mounting thermostats Series EMf-80 are used as safety temperature limiters in open and closed heating installations to DIN 4751 and steam
boilers to DIN 4752.
A
Cutting through or kinking the capillary of the panel-mounting thermostat
Series EMf-80 will result in the permanent failure of the instrument!
1.3 Marking
H
Version to DIN 3440 as STB = safety temperature limiter
JUMO panel-mounting thermostats Series EMf-80
are approved to VDE 0631
1.4 Safety notes
The expansion fluid may escape in the event of a system fracture. At present,
H
there is no restrictive statement from health authorities concerning any danger
to health over short periods and at low concentrations, e.g. after a fracture of
the measuring system.
Physical and toxicological properties of the media which may escape in the
event of a system fracture.
Top end of scale
°C
up to 200°C – +280 1.2 - 7.5 X X X –
≥
Danger-
ous
reactions
temperature
– = no; X = yes
Fire/ explosion
hazard
Ignition
°C
Explosion
limit
% v/v
Water
contami-
nation
Toxicological data
irritant danger
to
health
toxic
6
2.1 Nameplate
(1) Type code (see type designation below)
(2) Limit value / ambient temperature at which this thermostat has been
calibrated (option) / permissible ambient temperature and Protection
2 Identifying the instrument
(1)
(2)
(3)
(4)
STB 82699
(3) Rating
(4) Test mark
2.2 Type designation
Type
designation
EMf-80 panel-mounting thermostat with single-pole snap-action
f with capillary
-80 safety temperature limiter (STB)
/U with n.c. (break) contact and lock-out,
/au switch contacts gold-plated
switch,
(normally Form A = plain cylindrical probe)
with n.c. (break) contact and lock-out,
switching point factory-set
and additional signal contact
2.2.1 Extra codes
Case fixing
standard central fixing
b1 2 screws M4, spaced 28 mm
b2 2 screws M3, spaced 33 mm
b3 2 screws M3, spaced 22 mm
7
3 Mounting
3.1 Dimensions
EMf-80
(standard)
26
21
10 a/f
6
SW10
16
Ø
1.5
46
12
13 a/f
SW13
15.5
EMf-80 /
b1, b2, b3
21
52
G
thread
29
1
2
6
16
21
Ø
1.5
36.5
Ød
L
46
52
B
38
1
2
29
2.5
36.5
d
Ø
L
8
3.2 Securing the panel-mounting thermostat
3 Mounting
Operating
position
any
3.2.1 Central fixing
(standard)
Chapter 3.1 "Dimensions", page 8
H
➩
Drill fixing hole
✱
Unscrew cap nut M 10 x 1, 10 a/f .
✱
Unscrew fixing nut M 10 x 1, 13 a/f.
✱
Insert thermostat in panel and secure with fixing nut.
✱
Do not overload the plastic thread!
Screw on the cap nut.
✱
mm dia. in panel.
10.5
3.2.2 Fixing bracket
(Code b1, b2, b3)
Chapter 3.1 "Dimensions", page 8
H
➩
Drill two fixing holes 3.5 mm or 4.5 mm dia. into the panel.
✱
If required, drill the hole into the panel for resetting the thermostat.
Secure the thermostat with two M3 or M4 screws. It is essential that
the thermostat is not damaged by excessively long screws.
9
3 Mounting
3.3 Capillary/ temperature probe/ pocket
3.3.1 General
Cutting through or kinking the capillary will result in the permanent failure of
A
H
the instrument!
The minimum permissible bending radius of the capillary is 5 mm.
The temperature probe must be installed in JUMO pockets. If this is not the
case, the approval of the thermostat becomes void.
The temperature probe must be completely immersed in the medium.
Fitting several probes into a common pocket is permitted only with 2 or 3 plain
probes 6 mm dia. and pockets 15 x 0.75 mm.
When fitting 2 probes, the spring clip supplied by the factory must be fitted in
the pocket.
For use in air, Form A (without pocket) has to be used.
10
3 Mounting
3.3.2 Approved probe forms and protection tubes (pockets)
hex
SW
L1
thread
G
L
S
_15
Ød
ØD
AU
Plain cylindrical bulb Screw-in pocket with
screw-in spigot Form A
to DIN 3852/2,
with fixing screw
Ø25
27
Ø30
hex
SW
thread
L1
G
ØD
Ø13
S
Ø10
Ø12
Ø8
US UH
Weld-in pocket
with fixing screw and clip
Screw-in pocket, no
sealing shoulder; for
sealing with hemp
(for temperatures
up to +110°C).
With fixing screw and
clip.
S
ØD
11
3 Mounting
3.4 Permissible operating conditions at the pocket
3.4.1 Pockets U, US and UH
The values below refer to the maximum loading on the mounting concerned.
A
3.4.1.1 Protection tube in steel U and US
The maximum pressure that can be sealed depends on the mounting conditions and may be lower.
Material: Tube: St 35.8 I
Screw-in nipple: 9 SMnPb.28 K
Weld-in nipple: 16 Mo 3
Temperature Tube diameter
8 x 0.75 mm
or taper
100°C89bar 72bar 48
150°C83bar 67bar 45
3.4.1.2 Protection tube in steel U and US
Material of tube and nipple: X 6 CrNiMoTi 17 122
100°C92bar 74bar 50
150°C88bar 71bar 48
3.4.1.3 Protection tube in brass U
Material of tube and nipple: brass (CuZn)
100°C50bar 40bar 27
150°C48bar 39bar 26
10 x 0.75 mm 15 x 0.75 mm
max. permissible pressure
3.4.1.4 Protection tube in brass UH
Material of tube and nipple: brass (CuZn)
110°C16bar
12
*
3 Mounting
Probe
mounting A
A
For use in pressure-free media
To ensure overall accuracy, the thermostat must only be used in conjunction
with the pockets supplied by the factory.
3.5 Mounting the probe
only
(1)
(2)
H
The temperature probe (2) must be completely immersed in the medium. If this
is not the case, there will be appreciable deviations from the switching point.
With mountings U, UH and US, the temperature probe is secured in the pocket
by a clip (1).
13
4 Installation
4.1 Regulations and notes
The electrical connection must only be carried out by qualified personnel.
❏
The choice of the cable, the installation and the electrical connection must
❏
conform to the requirements of VDE 0100 “Regulations for the installation
of power circuits with nominal voltages below 1000 V”, or the appropriate
local regulations.
If contact with live parts is possible while working on the unit, it must be
❏
completely disconnected from the supply.
Earth the instrument at terminal PE to the earth conductor. This cable must
❏
have a cross-section that is at least as large as the supply cables. Earth
cables must be run in a star configuration, to a common earth point which
is connected to the protective earth of the supply. Do not loop the earth
cables, i.e. do not run them from one instrument to another.
Apart from faulty installation, incorrect settings on the thermostat can affect
❏
the proper functioning of the following process or lead to damage. Only
qualified personnel must be allowed to make adjustments. Please observe
the appropriate safety regulations in this matter.
14
4.2 Electrical connection
ϑ
1
2
4
When the thermostat is mounted using the fixing bracket (extra code b1, b2 or
H
b3), the protective earth conductor must always be connected through a faston connector A 6.3 x 0.8, DIN 46 244.
4 Installation
Fast-on
connection
Screw
connection
(standard)
Rear view
( 1 ) = fast-on connector A 6.3 x 0.8 DIN 46 244
Code X
(1) = receptacle
(2) = connecting screw
(3) = terminal strip
(4) = fast-on connector
A 6.3 x 0.8,
DIN 46 244
( 1 )
2
1
( 1 )
( 2 )
( 3 )
( 4 )
4.3 Connection diagrams
EMf-80 EMf-80/U
1
ϑ
2
The cable can be attached or replaced without any special tools, by using
standardized cables that do not require any special preparation.
15
5 Resetting the STB thermostat
5.1 Resetting the STB
After the temperature has dropped by approx. 10 °C of the scale span below
the set limit (danger temperature), the snap-action switch can be reset.
5.1.1 Version for central fixing
Unscrew the cap nut (1).
✱
( 1 )
Push down the reset button (2) until
✱
the snap-action switch is reset.
Chapter 5.1.2 "Version with fixing bracket", page 17.
➩
( 2 )
( 1 )
16
Screw the cap nut (1) back into position.
5 Resetting the STB thermostat
5.1.2 Version with fixing bracket
Push the reset button (1) in the direction of the arrow
✱
until the snap-action switch is reset.
5.2 Self-monitoring
5.2.1 Response to a break of the measuring system
( 1 )
Failure of the measuring system, i.e. when the expansion liquid escapes, will
H
5.2.2 Response to low temperature
H
cause the pressure in the sensing system of the EMf-80 to drop and the circuit
1-2 will open. The thermostat can no longer be reset.
At temperatures below -10°C, circuit 1-2 will open, but will close automatically
when the temperature rises.
17
6 Instrument description
6.1 Technical data
Permissible
ambient
temperature
in operation
max. +80°C+80°C max. limit setting +15%
min. -40°C-40°C-50°C
Capillary Switch head at temperature probe
Permissible
storage
temperature
Max.
current rating
Fusing required
+50°C max., -50°C min.
Type Current rating
EMf-80 230 V AC, 10 (2) A, p.f. = 1 (0.6)
230 V DC, 0.25 A
EMf-80/U Terminal 2:
230 V AC, 10 (2) A, p.f. = 1 (0.6)
230 V DC, 0.25 A
Ter min al 4 :
230 V AC, 2 (0.4) A, p.f. = 1 (0.6)
230 V DC, 0.25 A
EMf-80/au AC/DC 24 V, 0.1 A
contact resistance ≤ 5m
see max. current rating
Ω
Switching point
accuracy
Mean ambient
temperature
drift referred
to limit setting
Weight
Protection
18
based on limit setting at T
If the ambient temperature at the switch head and / or the capillary deviates
from the +22°C calibration ambient temperature, there will be a switching
point displacement.
Higher ambient temperature = lower switching point
Lower temperature = higher switching point
at the switch head at the capillary per m
0.35 °C per °C
If the operating temperature differs appreciably from the +22°C calibration
ambient temperature, it is possible to allow for this during calibration (at extra
charge).
approx. 0.3 kg
EN 60 529 - IP00
+22°C = +0 °C/-5°C
amb
0.07 °C per °C
m
·
6 Instrument description
Operating
medium
Time constant
t
0.632
Action
Capillary and
probe
water, oil, air, superheated steam
in water in oil in air/ superheated
steam
45 sec
≤
according to EN 60 730-1
Type 2BK =automatic action with micro switch-off in operation, with break
protection.
Materials
Capillary Probe
standard copper, Mat. Ref. 2.0090
1.5 mm dia.
on request stainless steel,
Mat. Ref. 1.4571
1.5 mm dia.
60 sec
≤
120 sec
≤
copper, Mat. Ref. 2.0090
brazed
stainless steel,
Mat. Ref. 1.4571
welded
Connecting
cable
Conductor cross-section 2.5 mm
2
max.
19
M. K. JUCHHEIM GmbH & Co
Street address:
Moltkestraße 13 - 31
36039 Fulda, Germany
Delivery address:
Mackenrodtstraße 14
36039 Fulda, Germany
Postal address:
36035 Fulda, Germany
Phone: +49 (0) 661 60 03-0
Fax: +49 (0) 661 60 03-5 00
E-Mail: mail@jumo.net
Internet: www.jumo.de
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2TT, UK
Phone: +44 (0) 1279 63 55 33
Fax: +44 (0) 1279 63 52 62
E-Mail:
sales@jumo.co.uk
JUMO PROCESS CONTROL INC.
885 Fox Chase, Suite 103
Coatesville, PA 19320, USA
Phone: 610-380-8002
1-800-554-JUMO
Fax: 610-380-8009
E-Mail:
Internet: www.JumoUSA.com
info@JumoUSA.com
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