Landis & Staefa CC1N7696E April 15, 1997 1/17
7696
Gas Valve Proving SystemVALVEGYR®
LDU11...Series ...A...
The LDU11... gas valve proving system is designed for use in gas-fired plantequipped with two safety shutoff valves. During each startup cycle, the control unitautomatically programs the valve proving test and, in the event of a leak, preventsburner startup.
The LDU11... control unit is designed to provide automatic gas valve proving (leakagetest) based on the pressure proving principle. It is for use in gas-fired plant with or withoutvent pipe to the atmosphere. For plants without vent pipe, where DIN/DVGW regulationsapply, refer to the hints given on «Connection examples with vent pipe to theatmosphere».
Gas valve proving is initiated automatically with every burner startup using one or twostandard pressure monitors, either
– prior to burner startup,– during the pre-purge time, if it lasts at least 60 s,– immediately after the controlled shutdown, or– on completion of the burner control's control program, e.g. on completion of the post-
purge time
The valve proving test is based on the two-stage pressure proving principle: first, thevalve on the mains side is tested by evacuating the test space and by monitoring theatmospheric pressure in it. Then, the valve on the burner side is checked by pressurizingthe test space and by monitoring the gas pressure. If the pressure increases excessivelyduring the first test phase (Test 1), or decreases excessively during the second testphase (Test 2), the control unit inhibits burner startup and goes to lockout. In that case,the lockout reset button lights up to indicate the fault. Remote indication of the fault isalso possible. A program indicator, which stops whenever a fault occurs, indicates whichof the two valves is leaking.
The LDU11... can be reset either on the unit itself or with an electric remote resettingdevice.
ISO 9001
Use
2/17 CC1N7696E April 15, 1997 Landis & Staefa
The control unit is of plug-in design. Housing and plug-in base are made from impact-proof and heat-resistant plastic material.The housing accommodates:
– The synchronous motor of the sequence switch complete with gear train and stepaction sequence switch
– The camshaft with 15 non-adjustable cams– The program indicator at the head of the camshaft– One main and one auxiliary relay– The lockout relay which can be electrically reset from a remote location and which
provides the functions «Lockout» and «Resetting»– The unit fuse with a spare fuse
All electrical components are interconnected via printed circuits.
The plug-in base carries the following terminals:
– 24 connection terminals– 2 auxiliary terminals (nos. «31» and «32»)– 3 earth terminals– 3 neutral terminals (prewired to terminal 2, the neutral input)
The following knockout holes are available for the cable entry:
– 14 knockout holes for the cable entry by means of cable glands, 8 at the side and 6 atthe bottom of the base
– 6 threaded knockout holes at the side for cable entry glands Pg11
Plug-in base and terminals are designed such that the erroneous plugging in of a unit withthe same housing, which is not suited for use with the relevant burner, is madeimpossible.
Visible in the transparent lockout reset button, the program indicator informs service staffabout the programming sequence, the type of fault and the point in time the faultoccurred, using easy-to-remember symbols.
Control unit for gas valve proving, without base
– For AC 220-240 V, 50-60 Hz LDU11.523A27– For AC 100-110 V, 50-60 Hz LDU11.523A17
Plug-in base AGM11
Mains voltage AC 220 V -15 %...240 V +10 % Perm. current rating of control terminalsAC 100 V -15 %...110 V +10 % 4 A to VDE 0660 AC3
Mains frequency 50 Hz -6 %...60 Hz +6 % Required switching capacityof pressure switch «DW» 1 A min., AC 250 V
Power consumption- during the test 3.5 VA Mounting position optional- during burner operation 2.5 VA Degree of protection IP40
Prefuse (externally) T16/500 V WeightUnit fuse T6,3H250 V to IEC 127 − control unit approx. 1000 gRadio interference protection N to VDE 0875 − base approx. 165 g
Perm. input current at terminal 15 A continuous to VDE 0660 AC3
Environmental conditions: CE conformity- Transport IEC721-3-2 According to the directives of the European Community Climatic conditions class 2K2 Electromagnetic compatibility EMC Temperature -50...+60 °C 89/336 EWG include. 92/31 EEC Humidity < 95 % r.h. Gas appliance directive 90/396 EEC Mechanical conditions class 2M2 Emissions EN 50081-1- Operation IEC721-3-3 Immunity EN 50082-2 Climatic conditions class 3K5 Temperature -20...+60 °C Humidity < 95 % r.h.Condensation, formation of ice and influence of water are not permitted.
Mechanical design
Ordering
Technical data
Landis & Staefa CC1N7696E April 15, 1997 3/17
To carry out the first phase of the valve proving test, called «Test 1», there must beatmospheric pressure in the length of pipe between the two valves to be tested. In plantswith a vent to the atmosphere, this pressure is available if the valve proving test isconducted prior to or during the pre-purge time. In plants without a vent pipe,atmospheric pressure is made available as the control unit opens the valve on the burnerside during the time «t4». If the valve proving test is performed after the operation of theburner, the valve on the burner side after the controlled shutdown can be kept open until«t4» has elapsed, thus reducing the pressure in the test space and making certain its gascontent is burnt off in the combustion chamber during the post-purge time. A prerequisitefor this procedure is an appropriate control program of the burner control as provided byLandis & Staefa burner controls type LFE..., LFL..., LGK.... or LEC....
The test space is closed off after it has been evacuated. During the first test phase(Test 1) which follows immediately, the control unit checks if the atmospheric pressure inthe test space is maintained using the pressure monitor. If the valve on the mains side isleaking, causing the pressure to rise above the switching point of the pressure monitor,the control unit initiates an alarm and goes to lockout. The program indicator then stopsand indicates «Test 1».
If the pressure does not increase because the valve closes correctly, the control unitimmediately programs the second test phase (Test 2). To do this, the valve on the mainsside is pressurized («filling» of test space). During the second test phase, the pressuremay not fall below the switching point of the pressure monitor due to a leak of the valveon the burner side. If it does, the control unit goes to lockout again, thus inhibiting burnerstartup.
On the successful completion of the second test phase, the control unit closes the internalcontrol loop between terminals 3 and 6 (circuit path: terminal 3 - contact «ar 2» -terminals 4 and 5 - contact III - terminal 6). This control loop is usually included in the startcontrol loop of the burner control.
After the control loop has been closed, the programming mechanism of the control unitreturns to its start position where it switches itself off. During these «idle steps», theposition of the control contacts of the programming mechanism remains unchanged.
Mode of operation
4/17 CC1N7696E April 15, 1997 Landis & Staefa
When the unit goes to lockout, the programming mechanism stops and also the positionindicator fitted to the spindle of the mechanism. The symbol that stops above the readingmark not only indicates during which test phase lockout occurred, but also after howmany programming steps within the test phase (1 step = 2.5 seconds).
Meaning of symbols:
Start position = operating position
In plants without a vent valve: evacuation of test space through opening of thevalve on the burner side
«Test 1» with atmospheric pressure (valve proving test on the mains side)
Filling the test space through opening of the valve on the mains side
«Test 2» with gas pressure (valve proving test on the burner side)
Idle steps until programming mechanism switches itself off
Operating position = start position for the next valve proving test
In the event of lockout, all terminals receiving voltage from the control unit are de-energized, except terminal 13, which is used for lockout indication.
After the unit has been reset, the programming mechanism automatically returns to itsstart position and immediately reprograms a new valve proving test.
Note: do not press the reset button for more than 10 seconds.
A power failure prior to evacuating the test space does not cause the program sequenceto change.
If a power failure occurs after the evacuation, the valve proving test will not be continuedwhen power is restored, but the programming mechanism first returns to its start positionto reprogram the complete proving test.
Program and lockoutindicator
Test 1
Test 2
Control program after apower failure
Landis & Staefa CC1N7696E April 15, 1997 5/17
Calculation of leakage rate escaping from a length of pipe
where:
QLeck in dm3/h Permissible leakage rate in dm3 or liters per hour
PG in mbar Overpressure in pipe section between the valves to be tested, at the beginningof the test phase
PW in mbar Overpressure set at pressure monitor DW(usually set to 50 % of the gas mains pressure)
Patm in mbar Absolute pressure (1013 mbar normal pressure)
V in dm3 Volume of test space confined by the valves to be tested, including the space inthe valves themselves
tTest in s Duration of proving time
PG = 30 mbar
PW = 15 mbar
Patm = 1013 mbar Any valve leakage rate exceeding 20 l/h causes the control unit to go to lockoutV = 10.36 dm3 Any valve leakage rate exceeding 20 l/h causes the control unit to go to lockout
tTest = 27.5 s
Note: the volume of pipe section V between the gas valves to be checked andoverpressure Pw set on pressure monitor «DW» must be selected such that themaximum permissible gas leakage rate QLeck will not exceed the rate specified inthe local regulations.
t4 5 s Evacuation of test spacet6 7.5 s Interval from start to energizing of main relay «AR»t1 22.5 s First test phase with atmospheric pressuret3 5 s Filling the test spacet2 27.5 s Second test phase with gas pressuret5 67.5 s Total duration of valve proving test to the enabling of the burnert20 22.5 s Running time of programming mechanism until it switches itself off in the
operating = start position («idle steps»)
QLeck=
(PG -Pw t TestPatm x
x x
Example
Control program
6/17 CC1N7696E April 15, 1997 Landis & Staefa
A, A1, A2 Gas valves controlled to empty the test spaceAL Alarm signal «Leaking valve»AR Main relay with contacts «ar...»AS Built-in fuseB Gas valve controlled to fill the test spaceBR Lockout relay with contacts «br...»C Vent valve, normally open; closed during valve proving test from the beginning of «Test 1»DW Pressure monitor for valve proving test
(does not replace the gas pressure monitor used to signal lack of gas)E Safety shutoff valve, normally closed; optionalEK... Lockout reset buttonEK2 Remote lockout reset buttonGP Gas pressure monitor (for lack of gas)HR Auxiliary relay with contacts «hr...»L1 Built-in lockout warning lampLDU Control unitLP Air pressure monitorM... Fan (M2: pre- and post-purge)R Control thermostat or pressurestat, e.g. boiler control thermostatRB Pipe orifice, its diameter must be determined such that in the event of a leaking pilot gas
valve «A», the pilot flame cannot afterburn on completion of the 2nd safety time so that thepresence of the main flame cannot be simulated
SK Control contact (initiation of valve proving test)SM Synchronous motor of programming mechanismT Delay off time relay: the time should be set to approx. t16 (t7 min. ...t10 max.) of the burner
controlW Limit thermostat or pressure monitor
1) Do not press EK for more than 10 seconds2) Expanding flame or interrupted pilot burner operation
Connection diagram
M~
L
EK2
18 1
SK1)
AS ar2
3 4 5
III
6
a b
I
8
a b
V
10 12 19 23 20
a b a b
XI hr1
22 21 24
hr2 HR
ba
XIII
a b
IXar1
br1
IV
15 14
16 17
P GP
DW
Atm. Gas VII
b a
VIII
a bar3
b aVI
AR
br2
BR
L1EK1
1)
13
ALN
2 7 9 11
SM
LDU11
7696a15/0695
Legendfor the entire data sheet
Landis & Staefa CC1N7696E April 15, 1997 7/17
• • The electrical wiring must comply with local and country-specific standards andregulations!
• The LDU11... must be completely isolated from the mains before performing anywork on it!
• The LDU11... is a safety device. It is therefore not permitted to open, interferewith or modify the unit!
• Check wiring carefully before putting the unit into operation!
• Check all safety functions when putting the unit into operation or after replacinga fuse!
• Ensure protection against electric shock hazard on the unit and at all electricalconnections through appropriate mounting!
• Electromagnetic emissions must be checked from an application point of view!
• The regulations and standards covering the specific application must beobserved!
• All installation and commissioning work must be carried out by qualifiedpersonnel!
• • In the geographical areas where DIN standards are in use, the installation mustbe in compliance with VDE requirement, particularly with the standards DIN/VDE0100 and 0722!
• • Condensation and ingress of humidity must be avoided!
• • Ignition cable must always be laid separately, observing the greatest possibledistance to other cables!
Sequence diagram
Warning notes
8/17 CC1N7696E April 15, 1997 Landis & Staefa
Connection examples with vent pipe to the atmosphere using burner control LFI7...
For other connections, refer to the wiring diagram of the burner control.
Proving test prior to burner startup Proving test following immediately the controlled shutdown
Connection examples with vent pipe to the atmosphere using burner control LFM1...
For other connections, refer to the wiring diagram of the burner control.
Proving test prior to burner startup Proving test following immediately the controlled shutdown
LDU11
hr2
N
N
1415
18 1
EK2
2
1716
3
ar2 III
54DW
BE
11
hr1XII
7
V
9
8 1210 2319 206
LC
N W
R
PGP
LFI7..., S.03 1
N
A
M
34
AL
22
13N
2421
LP
5
7696a17/0695
LDU11
hr2
LP
GP
N
1415
18 1
EK2
2
17
16
3
ar2 III
54DW
BE
11
hr1XII
7
V
9
8 1210 2319 206
M
NN
C
W
R
L
51 LFI7..., S.03
N
A
34
AL
22
13N
21 24
7696a16/0695
N
DW
L
LFM1...
LDU11
22
A2
GP E C
17
163
ar2 III
54
15 14
18
EK2
1
B
hr2
11
hr1XI
12
V
9
10
I
7
86
2
23 2019
RW
310
N
A1
N
LP
M
N
874 5
AL
13N
21 24
9
7696a18/0695
L
LDU11
hr2
A1
E
N
6
2
DW
17
16
15
18 1
ar2
4 5
14
3
EK2
III
BC
hr1
23 20198
7
V
9
10 12
XI
11
I
LP
R
P
GP
W
LFM1... 10 34
A2
N
M
N
5 8
AL
13N
242122
N
7
7696a19/0695
Landis & Staefa CC1N7696E April 15, 1997 9/17
Connection examples with vent pipe to the atmosphere using burner control LGB2.../3.../4...
For other connections, refer to the wiring diagram of the burner control.
Proving test prior to burner startup
Proving test following immediately the controlled shutdown
Installations with vent pipe to the atmosphere
LDU11
17
DW
2
C
54
hr1
GP231116
15
EB
6
IIIar2
3
R/W
N
1
12LGB2.../3.../4...
HL
hr2
XI
2014 1912 22
53 4
A2A1M
N
AL
13
2421
10
7696a05/0595
N
L
LDU11
22
542
C
hr1
7
B
11
E
12
P
III
11614 15
DW
ar2
17 3
LGB2.../3.../4...
H
6hr2
19 23 20
I
8 12
XI
R/W
A2 A1
5
GP
3
M
N
13
AL
21 24
4
7696a06/0595
GPE
C
B
DW
LDU
AA2A1
C
DW
LDU
BGP
E
7696s01/0695
10/17 CC1N7696E April 15, 1997 Landis & Staefa
Connection examples with vent pipe to the atmosphere using burner control LFE, LFL, LGK orprogramming unit LEC...
For other connections, refer to the wiring diagram of the burner control.
Proving test prior to burner startup Proving test during pre-purge time (60 s min.)
Valve proving with two pressure monitors
DWG Pressure monitor for the gas valve proving test with gas pressure. This pressure monitors must be set to the minimum gas pressurepermitted during the proving test. If this pressure is not reached during the test, the control unit goes to lockout.
DWA Pressure monitor for the gas valve proving test with atmopheric pressure. This pressure monitor must be set to the maximum gas pressurepermitted during the proving test with atmospheric pressure. If this pressure is exceeded during the test, the control unit goes to lockout.
DWG and DWA must be overload-proof up to the gas pressure level.
Installations with vent pipe to the atmosphere
N
LDU11
hr2
GP E C B
5
W
1415
618 1 4
ar2 III
5
EK2
17
163
8
4
9LFE1LEC1
LFL1...LGK16...
R
11
19
hr1XI
202312
9
V
10
7
8
I
2
N
5°/10°°
18°/17°°
A
AL
13N
242122
7696a07/0796
DW
2)
2)
N
LDU11
hr2
GP CE B
4
14
W
1415
618 1 3
ar2 III
5
EK2
17
164
LP
8 18 19
4
9
5 12 13
LFE1LEC1
LFL1...LGK16...
R
11
201912
hr1XI
23
N
9
10
V
7
8
I
2
5°/10°°
18°/17°°
A
AL
22
13
2421
N
7696a08/0796
DW
2)
2)
16
17
DWG DWA 15
7696a09/0796
Landis & Staefa CC1N7696E April 15, 1997 11/17
Connection examples with vent pipe to the atmosphere using burner control LFE,LFL, LGK or programming unit LEC...
Proving test both during the pre-purge time (60 s min.) and immediately after thecontrolled shutdown in plants with a vent pipe to the atmosphere. On delay of relay d> 2 s.
Proving test following immediately the controlled shutdown
N
LDU11
hr2
GP C
1415
18 1EK2
217
166
III
53
ar2
4
BE
11
201912
hr1XI
238
I
7
10
V
9
14
W
2
d
LFE1LEC1
LFL1...LGK16...
18 199
12 134
LP
8
5
RN
4 5°/10°°
18°/17°°
A
AL
22
13
2421
N
7696a10/0796
DW
2)
2)
LDU11
hr2
GP C
N
BE
6
W
1415
18 1
17
16III
53
ar2
4
2
EK2
4
LFE1LEC1
LFL1...LGK16...
8
RN
11
201912
hr1XI
23
I
7
10
V
9
8
5°/10°°
18°/17°°
A
9
5
AL
7696a11/0796
22
13
2421
N
DW
2)
2)
12/17 CC1N7696E April 15, 1997 Landis & Staefa
Connection example without vent pipe to the atmosphere (suitable for allcountries) using burner control LFE, LFL, LGK or programming unit LEC...
Proving test following immediately the controlled shutdown in plants without ventpipe. Valve «A» or «A1» remains open after the controlled shutdown until the start of thefirst test phase is reached in order to evacuate the test space and to burn off the gascontained in it in the combustion chamber during the after-burn time.
Valve proving with two pressure monitors
DWG Pressure monitor for the gas valve proving test with gas pressure. This pressure monitors must be setto the minimum gas pressure permitted during the proving test. If this pressure is not reached duringthe test, the control unit goes to lockout.
DWA Pressure monitor for the gas valve proving test with atmopheric pressure. This pressure monitor mustbe set to the maximum gas pressure permitted during the proving test with atmospheric pressure. If thispressure is exceeded during the test, the control unit goes to lockout.
DWG and DWA must be overload-proof up to the gas pressure level.
Installations without vent pipe to the atmosphere
LDU11
hr220
EGP
N
BA
R
1415
18 1
17
163
ar2
4
2
EK2
5
III
6
4
LFE1LEC1
LFL1...LGK16...
8 9
W
5
11
1912
hr1XI
23
I
7
8
V
9
10
M2N
5°/10°°
18°/17°°
17
7
AL
7696a12/0796
13
24
N
2122
3
6
DW
2)
2)
16
17
DWG DWA 15
7696a09/0796
Landis & Staefa CC1N7696E April 15, 1997 13/17
Connection examples without vent pipe to the atmosphere using burner control LFI7...(cannot be used where DIN/DVGW and TRD412 regulations are in force)
For other connections, refer to wiring diagram of the burner control.
Proving test prior to burner startup Proving test following immediately the controlled shutdown
Connection examples without vent pipe to the atmosphere using burner control LFM1...
For other connections, refer to wiring diagram of the burner control.
Proving test prior to burner startup Proving test following immediately the controlled shutdown
N
DW
L
LFI7..., S.03
LDU11
22
LP
EGP
1415
18 1
EK2
2
17
163
ar2
4
III
65
I
BA
hr2
hr1
9
23 2010
V XI
1912
11
8
7
W
R
M
N
51 34
AL
13N
21 24
7696a20/0695
N
LFI7..., S.03
LDU11
8
E
1415
18 1
EK2
2
1716
3
ar2
DW 4 5
III I
6
7
BA
hr2
11
hr1
19 2023
XI
12
V
9
10
L
W
R
PGP
1 4
N
M
53
AL
13
N
242122
LP
7696a21/0695
LDU11
hr2
E
N
6
2
DW
17
16
15
18 1
ar2
4 5
14
3
EK2
III
BA1
hr1
23 20198
7
XI
11
I
12
V
9
10
LLP
R
P
GP
W
LFM1... 10 34
A2
N
M
N
5 8
AL
13N
242122
7
7696a23/0695
LDU11
A2
hr2
GP EN
DW
17
16
15 14
18
EK2
1 3
ar2
4 5
III
6
2
BA
11
hr1XI
23 201912
I
7
8
V
9
10
L
RW
LFM1... 10 3 4
A1
NM
N
LP
75
AL
22
13N
21 24
N
8 9
7696a22/0695
14/17 CC1N7696E April 15, 1997 Landis & Staefa
Connection examples without vent pipe to the atmosphere using burner control LGB2.../3.../4...
For other connections, refer to wiring diagram of the burner control.
Proving test prior to burner startup
Proving test following immediately the controlled shutdown
Installations without vent pipe to the atmosphere
N
LDU11
hr222
A1
GP
EB
N
DW
15
1 3 4
ar217
16
R/W
2
5 6
III
LGB2.../3.../4... 12
LH
9 2311
2010
hr1V XI
12 14 19
53
M A2
4
AL
13
2421
N
10
7696a13/0595
LDU11
hr222
E
N
BA1
15
ar217
16III
214
DW
PGP
LH
65431
12LGB2.../3.../4...
N
hr1
1197
202319108 12
I V XI
A2
53
M
N
AL
13
N
2421
4
R/W
7696a14/0695
GPE B
DW
LDU
AA2A1
DW
LDU
BGP
E
7696s04/0695
Landis & Staefa CC1N7696E April 15, 1997 15/17
Connection examples without vent pipe to the atmosphere using burner control LFE..., LFL..., LGK... orprogramming unit LEC...
For other connections, refer to wiring diagram of the burner control.
Proving test prior to burner startup Proving test during pre-purge time (60 s min.)
Valve proving with two pressure monitors
DWG Pressure monitor for the gas valve proving test with gas pressure. This pressure monitors must be set to the minimum gas pressure permittedduring the proving test. If this pressure is not reached during the test, the control unit goes to lockout.
DWA Pressure monitor for the gas valve proving test with atmopheric pressure. This pressure monitor must be set to the maximum gas pressurepermitted during the proving test with atmospheric pressure. If this pressure is exceeded during the test, the control unit goes to lockout.
DWG and DWA must be overload-proof up to the gas pressure level.
Installations without vent pipe to the atmosphere
LDU11
hr2
GP E
N
BA
W
1415
618 1
ar2 III
EK2
17
16
3 4 5DW
8
4
9LFE1LEC1
LFL1...LGK16...
R
11
19
hr1XI
202312
7
8
I
2 9
10
V
5
5°/10°°
18°/17°°
AL
13N
242122
7696a24/0796
2)
2)
N
LDU11
hr2
GP E BA
14
W
1415
618 1 3
ar2 III
5
EK2
17
16
4
LP
8 18 19
4
9
5 12 13
LFE1LEC1
LFL1...LGK16...
R
11
2019
hr1XI
2312
7
8
I
2 9
10
V
4 5°/10°°
18°/17°°
AL
22
13
2421
N
7696a25/0796
DW
2)
2)
16
17
DWG DWA 15
7696a09/0796
16/17 CC1N7696E April 15, 1997 Landis & Staefa
Connection examples without vent pipe to the atmosphere using burner control LFE..., LFL..., LGK... orprogramming unit LEC... and SKP70... with expanding flame burners
For other connections, refer to wiring diagram of the burner control.
Proving test prior to burner startup Proving test during pre-purge time (60 s min.)
Valve proving with two pressure monitors
DWG Pressure monitor for the gas valve proving test with gas pressure. This pressure monitors must be set to the minimum gas pressure permittedduring the proving test. If this pressure is not reached during the test, the control unit goes to lockout.
DWA Pressure monitor for the gas valve proving test with atmopheric pressure. This pressure monitor must be set to the maximum gas pressurepermitted during the proving test with atmospheric pressure. If this pressure is exceeded during the test, the control unit goes to lockout.
DWG and DWA must be overload-proof up to the gas pressure level.
The air pressure for the SKP (PL) must be sufficiently high to open the SKP70, although the burner’s air damper is closed. If this is not
observed, the LDU11... control unit will go to lockout when performing Test1
Installations without vent pipe to the atmosphere
LDU11
GP E
N
BA
2
LP
W
6
1415
18 1
ar2 III
EK2
17
16DW 4 53
14
8 18 19
4
9
12 13
LFE1LEC1
LFL1...LGK16...
R
4
5
hr2
11
2019
hr1XI
2312
7
8
I
9
10
V
M
5°
18°
AL
13
2421
N
22
N
6/7
3/17
7696a27/0796
LDU11
22
GP EN
BA
2
W
6
1415
18 1
ar2 III
EK2
17
16DW 4 53
LP
14
8 18 19
4
9
12 13
LFE1LEC1
LFL1...LGK16...
R
5
4
N
hr2
11
2019
hr1XI
2312
7
8
I
9
10
V
5°
18°
T
AL
M
13
2421
N
6/7
3/17
7696a26/0796
16
17
DWG DWA 15
7696a09/0796
GP
BE
DW
LDU
A
7696A02/0796C
SKP70
Landis & Staefa CC1N7696E April 15, 1997 17/17
Dimensions in mm
LDU11... with base AGM11...
AGM11...
Dimensions
1,5
123
7
15,5
618,9
25 25
7,5 5
15 15 15
27,5 27,5
37
7,5
103
103
7696m02/0296
5,2x6,7 40 18,5 13,5 5,7
5,7
12,81
15
25
40
51,5
12,85,7
51,5
51,513,8
13
51,540
7,5 18,9
4,4
1,5
5,2x6,75,2
32
N
31
1
2
3
4
5
6
7
8
9
10
11
1213 14 15 16 17 18 19 20 21 22 23 24
7696m01/0296
1997 Landis & Gyr Produktion (Deutschland) GmbH