Panel-mounting
Thermostats
Type KMf-20
or KMf-70
B 60.2045
Operating Instructions
09.01/00073778
Please read these Operating Instructions before commissioning the instrument. Keep the
manual 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 (0661) 6003-716
abroad (+49) 661 6003-0
Fax in Germany (0661) 6003-504
abroad (+49) 661 6003-607
All necessary settings and possible adjustments inside the instrument are described in
these operating instructions. However, if any problems should still 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.
Contents
Page
1 Introduction ............................................................................... 3
1.1 Typographical conventions
1.1.1 Warnings ..................................................................................................... 3
1.1.2 Note signs ................................................................................................... 3
1.2 Application
1.3 Identification
1.4 Safety notes
.................................................................................................
..............................................................................................
...............................................................................................
......................................................................
2 Instrument identification .......................................................... 5
2.1 Nameplate
2.2 Type designation
..................................................................................................
.......................................................................................
3 Mounting .................................................................................... 6
3.1 Dimensions
3.2 Securing the panel-mounting thermostat
3.2.1 Securing the thermostat head ..................................................................... 7
................................................................................................
...............................................
3
4
4
4
5
5
6
7
3.3 Capillary / Temperature probe / Pocket
3.3.1 General ........................................................................................................ 7
3.3.2 Approved probes and pockets ................................................................... 8
3.4 Permissible pressure loading on pockets
3.4.1 Pockets U, US, E and ES .......................................................................... 11
..................................................
............................................
11
4 Installation ............................................................................... 15
4.1 Regulations and notes
4.1.1 Electrical connection ................................................................................. 15
............................................................................
15
5 Settings .................................................................................... 17
5.1 Limit setting
5.2 Resetting the safety temperature limiter (STB)
5.3 Limit locking
5.4 Self-monitoring
5.4.1 Response to a fracture of the measuring system ..................................... 18
5.4.2 Response to falling below the temperature limit ....................................... 18
.............................................................................................
....................................
............................................................................................
........................................................................................
17
17
18
18
7
5.5 Use of the STW (STB) as STB
.................................................................
18
Contents
Page
6 Instrument description ........................................................... 19
6.1 Technical data
.........................................................................................
19
1.1 Typographical conventions
1.1.1 Warnings
1 Introduction
V
Danger
This symbol is used when there may be
tions are disregarded or not followed accurately!
Caution
A
1.1.2 Note signs
H
v
1
abc
This symbol is used when there may be
tions are disregarded or not followed accurately!
Note
This symbol is used when your
Reference
This symbol refers to
Footnote
special attention
further information
danger to personnel
damage to equipment
is drawn to a remark.
in other chapters or sections.
if the instruc-
if the instruc-
✱
Footnotes are notes which refer to certain points in the text. Footnotes consist
of two parts:
Marking in the text and the footnote text.
The text markings are arranged as continuous superscript numbers.
The footnote text (in smaller typeface) is placed at the bottom of the page and
starts with a superscript number.
Action
This symbol indicates that an
The individual steps are marked by this asterisk, e. g.
Adjust setpoint
✱
action to be performed
is described.
3
1 Introduction
1.2 Application
The panel-mounting thermostats Type KMf are suitable for monitoring heating
systems, boilers, heat exchangers and pumps in HVAC engineering.
Cutting through or kinking the capillary of the panel-mounting thermostats
A
1.3 Identification
Type KMf will result in permanent instrument failure!
Arrangement to DIN 3440 as
H
STB = safety temperature limiter
STW (STB) = safety temperature monitor
panel-mounting thermostats Type KMf conform to VDE 0631.
1.4 Safety notes
H
Range
with
top end of scale
+200°C < +200°C no +280°C 1.2 — 7.5 yes yes
≥
A fracture of the measuring system may cause a leakage of the filling liquid.
Physical and toxicological properties of the media which may escape in the
event of a system fracture:
Danger-
ous
reaction
Fire / explosion
hazard
Ignition
temp.
°C
Explosion
limit
% v/v
Water
contami-
nation
Toxicological data
irritant danger
to
health
1)
toxic
no
+200°C ≤+350°C no +490°C 1.0 — 3.5 yes yes
≥
1)
At present there is no restrictive statement from the health authorities
concerning any danger to health over short periods and at low
concentrations, e.g. after a fracture of the measuring system.
4
1)
no
2.1 Nameplate
(1) Type code (see type designation)
(2) Limit value / ambient temperature at which this thermostat has been
calibrated (option) / permissible ambient temperature and type of
protection
(3) Contact rating
(4) Mark of conformity
2 Instrument identification
(1)
(2)
(3)
(4)
2.2 Type designation
Type
designation
KM . - . ./ .
KM panel-mounting thermostat with microswitch
f with capillary,
standard probe form A (plain cylindrical probe)
-20 safety temperature monitor STW (STB)
-70 safety temperature limiter (STB),
with lock-out
/O n.c. (break) contact
/U changeover contact
5
3 Mounting
3.1 Dimensions
KMf
M4
250
48
38
°
(4)
0
100
(1)
10
(2)
( 1 ) Start of scale
( 2 ) Faston connectors A 6.3 x 0.8 mm
( 3 ) End of scale
( 4 ) Panel
( 5 ) Reset button
20
(3)
(5)
6
3.2 Securing the panel-mounting thermostat
3 Mounting
Operating
position
any
3.2.1 Securing the thermostat head
With two screws M4
on the chassis
(1) Screw
(2) Panel
(1)
(2)
3.3 Capillary / Temperature probe / Pocket
3.3.1 General
Cutting through or kinking the capillary of the panel-mounting thermostat will
A
H
result in permanent instrument failure!
The minimum permissible bending radius of the capillary is 5 mm.
The temperature probe must be installed in JUMO pockets, otherwise the
approval of the panel-mounting thermostat becomes invalid.
The temperature probe must be completely immersed in the medium.
To ensure their overall accuracy, the thermostats must only be used together
with the protective pockets supplied by the factory.
Pockets with diameter D = 10 mm may only be fitted with probes with diameter d = 8 mm.
When used in air, the temperature probe A (without pocket) has to be chosen.
7
3 Mounting
3.3.2 Approved probes and pockets
Forms
A and H
L
10
L1
L
10
~
Forms
D, B and C
_15
Ød
d
D
AH
Plain cylindrical bulb Coiled bulb
hex
hex
SW
thread
L1
G
S
L
15
~
d
SW
thread
L1
G
S
L
15
~
d
hex
SW
L1
S
L
15
~
d
DBC
Plain cylindrical bulb,
threaded connector
brazed or welded to
capillary.
Probe form C with loose
nipple, threaded on
both ends.
Plain cylindrical bulb
with shoulder and union
nut. Shoulder brazed or
welded to capillary.
8
Forms
h
U and US
3 Mounting
hex
SW
½" pipe
G ½
Ø D
14
Ø30
S
Ø 25
27
S
ØD
UUS
Screw-in pocket with
Weld-in pocket with fixing screw and clamp.
screw-in spigot Form A
to DIN 3852/2.
With fixing screw.
Ø13
Ø 10
Ø 12
Ø 8
Forms
UH and UO
SW
ex
L1
thread
G
S
D
hex
SW
thread
L1
G
D
S
d
UH UO
Screw-in pocket with
fixing screw, for sealing
with hemp (no sealing
shoulder), for tempera-
Screw-in pocket,
open at end, with fixing
screw.
tures up to 110°C.
9
3 Mounting
Forms
E and ES
hex
SW
hex
SW
Forms
Q and V
thread
L1
G
S
D
D2
S
D
EES
Screw-in pocket,
pocket secured with
Weld-in pocket with welding shoulder, pocket
secured with union nut, probe form C.
union nut, probe form C
washer
Scheibe
seal
Dichtung
washer
Scheibe
hex
thread
SW
L1
G
washer
Scheibe
Dichtung
Scheibe
washer
Dichtung
seal
thread
seal
hex
SW
G
L1
13
Ø
10
Ø
12
Ø
8
Ø
10
d
d
QV
Threaded at both ends,
for retrofitting on capillary. Max. probe
temperature +200°C.
Oil-resistant seal.
Sealing gland for retrofitting on capillary.
Max. probe
temperature +200°C.
Oil-resistant seal.
3.4 Permissible pressure loading on pockets
3.4.1 Pockets U, US, E and ES
The values below refer to the maximum loading on the probe mounting con-
A
3.4.1.1 Steel pockets U, US, E and ES
cerned. The maximum pressure that can be sealed depends on the installation
conditions and may therefore be lower.
3 Mounting
Material
Loading
Tube: St 35.8 I
Screw-in nipple up to 300°C: 9 SMnPb28 K
Screw-in nipple up to 450°C: 16 Mo 3 (turned groove)
Weld-in nipple: 16 Mo 3 (no groove)
Tube diameter D
Tem pe ra tur e
100°C89bar72bar 48
150°C83bar67bar 45
200°C78bar63bar 42
300°C59bar47bar 32
350°C50bar40bar 27
8 x 0.75 mm
or taper
Max. permissible pressure
10 x 0.75 mm 15 x 0.75 mm
11
3 Mounting
Permissible
flow velocity
Temperature: +200°C
Thermal medium:
Tube dia. D:
Permissible flow velocity v at max. permissible pressure loading and different
immersion tube lengths S
air
water, oil
. . . . . . . . . . . . . .
08mm
10 mm
15 mm
Air
Water, oil
Immersion tube length [mm]
Permissible flow velocity v at max. permissible pressure loading
and different immersion tube temperatures t.
Material: ST35.8
Immersion tube length S:
Thermal medium:
Tube diameter D:
200 mm
air
water, oil
. . . . . . . . . . . . . .
I
08mm
10 mm
15 mm
Air
Air
Air
12
Water, oil
Temperature [°C]
3.4.1.2 Stainless steel pockets U, US, E and ES
Loading
Material of tube and nipple: X 6 CrNiMoTl 17 122
3 Mounting
Tube diameter D
Tem pe ra tur e
100°C92bar74bar50bar
150°C88bar71bar48bar
200°C83bar67bar45bar
300°C72bar58bar39bar
3.4.1.3 Brass pockets U and E
Loading
Tem pe ra tur e
100°C50bar40bar27bar
150°C48bar39bar26bar
8 x 0.75 mm
or taper
Max. permissible pressure
Material of tube and nipple: brass (CuZn)
8 x 0.75 mm 10 x 0.75 mm 15 x 0.75 mm
Max. permissible pressure
10 x 0.75 mm 15 x 0.75 mm
Tube diameter D
3.4.1.4 Brass pocket UH
Loading
Temperature Max. permissible pressure
110°C16bar
3.4.1.5 Probe mountings B, C and D
(probe in direct contact with medium)
Nipple material CuZn 9 SMnPb.28 K X 6 CrNiMoTl 17 122
Temperature °C 200 300 400
Probe material Ø
SF-CuF 30
ST 35 - 1.4571
Material of tube and nipple: brass (CuZn)
mm
4 — 10 2 bar
Thermostat function: STB, STW (STB)
13
3 Mounting
A
A
H
Probe mountings A, H, UO, Q, V
- To ensure their overall accuracy, the thermostats must
together with the pockets supplied by the factory.
- Fitting several probes into a common pocket is only permitted with 2 or 3
cylindrical probes 6 mm dia. and pockets
- When fitting 2 probes into a common pocket, the factory-supplied spring
clip must be fitted in the pocket.
- When used in air, the temperature probe without pocket has to be used.
The temperature probe (2) must be completely immersed in the medium,
otherwise there will be appreciable deviations from the switching point.
With probe mountings U, US, UH und UO, the temperature probe is secured in
the pocket by a clamp (1).
may
be used in pressure-free media.
only
be used
only
15 x 0.75 mm.
(1)
(2)
14
4.1 Regulations and notes
The electrical connection must only be carried out by qualified personnel.
❏
V
The choice of cable, the installation and the electrical connection must
❏
conform to the requirements of VDE 0100 “Regulations on the installation of
power circuits with nominal voltages below 1000 V”, or the appropriate
local regulations.
Ensure that the instrument is completely isolated from the mains supply
❏
before carrying out work where live components may be touched.
Earth the instrument at terminal PE to the protective earth. This cable must
❏
have at least the same cross-section as the supply cable. Earthing cables
must be wired in star configuration, to a common earthing point which is
connected to the protective earth of the supply. Do not loop the earthing
cables, i. e. do not run them from one instrument to another.
Apart from faulty installation, incorrect settings on the thermostat may also
❏
affect the proper functioning of the following process or lead to damage.
Adjustments should therefore only be made by qualified personnel. Please
observe the corresponding safety regulations in this matter.
4 Installation
4.1.1 Electrical connection
- Connections suitable for fixed wiring
- Cable entry without strain relief
normally
( 1 ) Faston connectors (A 6.3 x 0.8 mm, DIN 46 244)
( 1 )
0
100
( 1 )
15
4 Installation
Code X
Connection
diagrams
Screw terminals up to 2.5 mm
( 1 ) Clamping block
( 2 ) Connection screw
Ty p e K Mf- 70
with n.c. (break)
contact and lock-out
Ty p e K Mf- 70
with n.c. (break)
contact, lock-out and
additional signal
contact
( 1 )
2
conductor cross-section
( 2 )
Ty p e K Mf- 20
with changeover
contact
16
5.1 Limit setting
Adjust the switching point on the limit spindle with a screwdriver before
✱
installing the thermostat.
5 Settings
( 1 )
( 3 )
100
( 2 )
0
( 4 )
( 1 ) Scale
( 2 ) Limit pointer
( 3 ) Top stop
( 4 ) Limit spindle
For limit setting ranges above 120°C, the set limit on the STB limiter has to be
locked to prevent re-adjustment.
5.2 Resetting the safety temperature limiter (STB)
After the temperature has dropped by about 10% of the scale span below the
set limit (safe temperature limit), the microswitch can be reset.
Press reset button ( 1 ) until the microswitch is reset.
✱
( 1 )
17
5 Settings
5.3 Limit locking
( 1 ) Cover
( 2 ) Screw suitable for lead sealing
5.4 Self-monitoring
( 1 )
( 2 )
5.4.1 Response to a fracture of the measuring system
On the STB and STW (STB), a fracture of the measuring system (leakage) will
H
5.4.2 Response to falling below the temperature limit
H
cause the circuit to open
On the STB, the microswitch will additionally be locked.
If the probe cools down to below the minimum temperature of -10°C, the circuit
opens automatically (STW (STB) and STB).
As the temperature rises above the minimum probe temperature, the STB has
to be reset manually.
Chapter 5.2 “Resetting the safety temperature limiter (STB)", page 17.
➩
The STW resets itself automatically.
permanently
.
5.5 Use of the STW (STB) as STB
V
The lock-out function to DIN 3440 must be ensured by a subsequent circuit.
This circuit must conform to DIN VDE 0116, Section 8.7.
18
6.1 Technical data
Permissible
ambient
temperature
max. +80°C +80°C
6 Instrument description
Capillary Thermostat
head
with end of scale
Permissible
probe
temperature
Permissible
storage
temperature
Case
Connection
cable
Switching
differential in %
of
scale span
min.
-40°C-40°C < 200°C
-20°C-20°C
end of scale +15% max.,
-50°C min.
+50°C max., -50°C min.
steel, zinc-plated
cover: heat-resistant plastic
max. conductor cross-section 2.5 mm
STW (STB) 9
+2
-1
200°C ≤ 350°C
≥
2
Max.
current rating
Fusing
required
Contact
Code Current ( A ) Voltage
type
STW
(STB) U -20
-70 16 (2)
n.c. (break)
contact on rising
STB U
temperature
n.o. (make)
contact on falling
temperature
STB O -70
see max. current rating
16 (2)
16 (2)
0.25
16 (2)
0.25
20(2)
26(2)
0.25
16 (2)
16 (2)
0.25
400 V AC
230 V AC p.f. = 1 (0.6)
230 V DC
400 V AC
230 V AC p.f. = 1 (0.6)
230 V DC
400 V AC
230 V AC
230 V DC
400 V AC
230 V AC p.f. = 1 (0.6)
230 V DC
19
6 Instrument description
Protection
Operating
medium
Time constant
t
0.632
Action
Nominal
position
Weight
EN 60 529 - IP 00
water, oil, air, superheated steam
in water in oil in air / superheated
45 sec
≤
according to EN 60 730-1
STB, STW (STB):
any
approx. 0. 3 kg
Type 2BK = automatic action
with micro disconnection in operation,
with break protection
60 sec
≤
steam
120 sec
≤
Material of
capillary and
probe
Minimum
bending radius
of capillary
End of scale Capillary Probe
up to +200°C copper, Mat. Ref. 2.0090
1.5 mm dia.
up to +350°C copper, Mat. Ref. 2.0090
1.5 mm dia.
at extra cost
up to +350°C st. steel, Mat. Ref. 1.4571
1.5 mm dia.
5mm
copper, Mat. Ref. 2.0090
brazed
st. steel, Mat. Ref. 1.4571
brazed
st. steel, Mat. Ref. 1.4571
welded
20
6 Instrument description
Switching point
accuracy
Mean
ambient
temperature
error
(in % of scale span;
referred to setpoint / limit value at T
STB, STW (STB) in upper third of scale
at start of scale
amb
+22°C)
+0
-5
+0
-10
%
%
(in % of scale span) referred to the limit value.
A deviation from the ambient temperature at the thermostat head and / or
capillary from the calibration ambient temperature +22°C produces a shift of
the switching point.
higher ambient temperature = lower switching point
lower ambient temperature = higher switching point
For temperatures with end of scale
< +200°C
+200°C ≤ +350°C
≥
on thermostat head, % per °C
0.17 0.13
on capillary, per °C per m length
0.054 0.11
21
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: +49 661 60 03-0
Fax: +49 661 60 03-6 07
E-mail: mail@jumo.net
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2TT, UK
Phone: +44 12 79 63 55 33
Fax: +44 12 79 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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