JUMO KMf-70 Operating Instructions Manual

Brand: JUMO

Model: KMf-70

Type: Operating Instructions Manual

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 commis-

sioning, 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 ...................................................................... 3

1.1.1 Warnings ..................................................................................................... 3

1.1.2 Note signs ................................................................................................... 3

1.2 Application ................................................................................................. 4

1.3 Identification .............................................................................................. 4

1.4 Safety notes ............................................................................................... 4

2 Instrument identification .......................................................... 5

2.1 Nameplate .................................................................................................. 5

2.2 Type designation ....................................................................................... 5

3 Mounting .................................................................................... 6

3.1 Dimensions ................................................................................................ 6

3.2 Securing the panel-mounting thermostat ............................................... 7

3.2.1 Securing the thermostat head ..................................................................... 7

3.3 Capillary / Temperature probe / Pocket .................................................. 7

3.3.1 General ........................................................................................................ 7

3.3.2 Approved probes and pockets ................................................................... 8

3.4 Permissible pressure loading on pockets ............................................ 11

3.4.1 Pockets U, US, E and ES .......................................................................... 11

4 Installation ............................................................................... 15

4.1 Regulations and notes ............................................................................ 15

4.1.1 Electrical connection ................................................................................. 15

5 Settings .................................................................................... 17

5.1 Limit setting ............................................................................................. 17

5.2 Resetting the safety temperature limiter (STB) .................................... 17

5.3 Limit locking ............................................................................................ 18

5.4 Self-monitoring ........................................................................................ 18

5.4.1 Response to a fracture of the measuring system ..................................... 18

5.4.2 Response to falling below the temperature limit ....................................... 18

5.5 Use of the STW (STB) as STB ................................................................. 18

Contents Page

6 Instrument description ........................................................... 19

6.1 Technical data ......................................................................................... 19

1 Introduction

1.1 Typographical conventions

1.1.1 Warnings

1.1.2 Note signs

abc1Footnote

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 action to be performed is described.

The individual steps are marked by this asterisk, e. g.

✱ Adjust setpoint

VDanger

This symbol is used when there may be danger to personnel if the instruc-

tions are disregarded or not followed accurately!

ACaution

This symbol is used when there may be damage to equipment if the instruc-

tions are disregarded or not followed accurately!

HNote

This symbol is used when your special attention is drawn to a remark.

vReference

This symbol refers to further information in other chapters or sections.

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.

1.3 Identification

1.4 Safety notes

Physical and toxicological properties of the media which may escape in the

event of a system fracture:

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.

ACutting through or kinking the capillary of the panel-mounting thermostats

Type KMf will result in permanent instrument failure!

HArrangement to DIN 3440 as

STB = safety temperature limiter

STW (STB) = safety temperature monitor

panel-mounting thermostats Type KMf conform to VDE 0631.

HA fracture of the measuring system may cause a leakage of the filling liquid.

Range

with

top end of scale

Danger-

ous

reaction

Fire / explosion

hazard

Water

contami-

nation

Toxicological data

Ignition

temp.

°C

Explosion

limit

% v/v

irritant danger

health

toxic

≥+200°C < +200°C no +280°C 1.2 — 7.5 yes yes 1) no

≥+200°C ≤+350°C no +490°C 1.0 — 3.5 yes yes 1) no

2 Instrument identification

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

2.2 Type designation

Type

designation

(1)

(3)

(4)

(2)

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

3 Mounting

3.1 Dimensions

KMf

( 1 ) Start of scale

( 2 ) Faston connectors A 6.3 x 0.8 mm

( 3 ) End of scale

( 4 ) Panel

( 5 ) Reset button

0100

250 °

(1)

(2)

(3)

(4)

(5)

3 Mounting

3.2 Securing the panel-mounting thermostat

Operating

position

any

3.2.1 Securing the thermostat head

With two screws M4

on the chassis

(1) Screw

(2) Panel

3.3 Capillary / Temperature probe / Pocket

3.3.1 General

(1)

(2)

ACutting through or kinking the capillary of the panel-mounting thermostat will

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.

HThe 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 diame-

ter d = 8 mm.

When used in air, the temperature probe A (without pocket) has to be chosen.

3 Mounting

3.3.2 Approved probes and pockets

Forms

A and H

Forms

D, B and C

Plain cylindrical bulb Coiled bulb

_15

Ød

~10

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.

~15

hex

thread

~15

hex

thread

~15

hex

3 Mounting

Forms

U and US

Forms

UH and UO

UUS

Screw-in pocket with

screw-in spigot Form A

to DIN 3852/2.

With fixing screw.

Weld-in pocket with fixing screw and clamp.

G ½

Ø D

hex

½" pipe

ØD

Ø25

Ø10

Ø13

Ø8

Ø12

Ø30

UH UO

Screw-in pocket with

fixing screw, for sealing

with hemp (no sealing

shoulder), for tempera-

tures up to 110°C.

Screw-in pocket,

open at end, with fixing

screw.

thread

hex

thread

3 Mounting

Forms

E and ES

Forms

Q and V

EES

Screw-in pocket,

pocket secured with

union nut, probe form C

Weld-in pocket with welding shoulder, pocket

secured with union nut, probe form C.

thread

hex

Threaded at both ends,

for retrofitting on capil-

lary. Max. probe

temperature +200°C.

Oil-resistant seal.

Sealing gland for retro-

fitting on capillary.

Max. probe

temperature +200°C.

Oil-resistant seal.

Scheibe

Dichtung

washer

seal

washer

hex

thread

Scheibe

Dichtung

washer

seal

washer

seal

hex

thread

3 Mounting

3.4 Permissible pressure loading on pockets

3.4.1 Pockets U, US, E and ES

3.4.1.1 Steel pockets U, US, E and ES

Material 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)

AThe values below refer to the maximum loading on the probe mounting con-

cerned. The maximum pressure that can be sealed depends on the installation

conditions and may therefore be lower.

Tem pe ra t ure

Tube diameter D

8 x 0.75 mm

or taper

10 x 0.75 mm 15 x 0.75 mm

Max. permissible pressure

100°C89bar72bar 48

150°C83bar67bar 45

200°C78bar63bar 42

300°C59bar47bar 32

350°C50bar40bar 27

3 Mounting

Permissible

flow velocity

Permissible flow velocity v at max. permissible pressure loading and different

immersion tube lengths S

Permissible flow velocity v at max. permissible pressure loading

and different immersion tube temperatures t.

Temperature: +200°C

Thermal medium: air

water, oil

Tube dia. D:

08mm

10 mm

. . . . . . . . . . . . . .

15 mm

Air

Water, oil

Immersion tube length [mm]

Material: ST35.8 I

Immersion tube length S:

200 mm

Thermal medium: air

water, oil

Tube diameter D:

08mm

10 mm

. . . . . . . . . . . . . .

15 mm

Air

Water, oil

Temperature [°C]

3 Mounting

3.4.1.2 Stainless steel pockets U, US, E and ES

3.4.1.3 Brass pockets U and E

3.4.1.4 Brass pocket UH

3.4.1.5 Probe mountings B, C and D

(probe in direct contact with medium)

Material of tube and nipple: X 6 CrNiMoTl 17 122

Tem pe ra t ure

Tube diameter D

8 x 0.75 mm

or taper

10 x 0.75 mm 15 x 0.75 mm

Max. permissible pressure

100°C92bar74bar50bar

150°C88bar71bar48bar

200°C83bar67bar45bar

300°C72bar58bar39bar

Material of tube and nipple: brass (CuZn)

Tem pe ra t ure

Tube diameter D

8 x 0.75 mm 10 x 0.75 mm 15 x 0.75 mm

Max. permissible pressure

100°C50bar40bar27bar

150°C48bar39bar26bar

Material of tube and nipple: brass (CuZn)

Temperature Max. permissible pressure

110°C16bar

Nipple material CuZn 9 SMnPb.28 K X 6 CrNiMoTl 17 122

Temperature °C 200 300 400

Probe material Ø mm Thermostat function: STB, STW (STB)

SF-CuF 30 4—10 2 bar

ST 35 - 1.4571

3 Mounting

With probe mountings U, US, UH und UO, the temperature probe is secured in

the pocket by a clamp (1).

AProbe mountings A, H, UO, Q, V may only be used in pressure-free media.

A- To ensure their overall accuracy, the thermostats must only be used

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 15 x 0.75 mm.

- 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.

HThe temperature probe (2) must be completely immersed in the medium,

otherwise there will be appreciable deviations from the switching point.

(1)

(2)

4 Installation

4.1 Regulations and notes

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)

V❏The electrical connection must only be carried out by qualified personnel.

❏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.

0100

( 1 ) ( 1 )

4 Installation

Code X

Screw terminals up to 2.5 mm2 conductor cross-section

( 1 ) Clamping block

( 2 ) Connection screw

Connection

diagrams

( 1 ) ( 2 )

Ty p e K M f - 7 0

with n.c. (break)

contact and lock-out

Ty p e K M f - 7 0

with n.c. (break)

contact, lock-out and

additional signal

contact

Ty p e K M f - 2 0

with changeover

contact

5 Settings

5.1 Limit setting

✱Adjust the switching point on the limit spindle with a screwdriver before

installing the thermostat.

( 1 ) Scale

( 2 ) Limit pointer

( 3 ) Top stop

( 4 ) Limit spindle

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.

100

( 1 )

( 3 ) ( 2 )

( 4 )

For limit setting ranges above 120°C, the set limit on the STB limiter has to be

locked to prevent re-adjustment.

( 1 )

5 Settings

5.3 Limit locking

( 1 ) Cover

( 2 ) Screw suitable for lead sealing

5.4 Self-monitoring

5.4.1 Response to a fracture of the measuring system

5.4.2 Response to falling below the temperature limit

5.5 Use of the STW (STB) as STB

( 2 )

( 1 )

HOn the STB and STW (STB), a fracture of the measuring system (leakage) will

cause the circuit to open permanently.

On the STB, the microswitch will additionally be locked.

HIf 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.

VThe lock-out function to DIN 3440 must be ensured by a subsequent circuit.

This circuit must conform to DIN VDE 0116, Section 8.7.

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JUMO KMf-70 Operating Instructions Manual

JUMO KMf-70 Operating Instructions Manual

JUMO KMf-70 Operating Instructions Manual

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