Krom Schroder VAS Series Operating Instructions Manual Download Page 4

GB-4

D

GB

F

NL

I

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Wiring

 WARNING

Attention! Please observe the following to ensure 

that no damage occurs:

–   Electric shocks can be fatal! Before working 

on possible live components, ensure the unit 
is disconnected from the power supply.

–   The solenoid actuator heats up during opera-

tion. Surface temperature approx. 85°C (approx. 

185°F).

 

Use temperature-resistant cable (> 90°C).

 1 

  Disconnect the system from the electrical power 

supply.

  

 Shut off the gas supply.

 

Wiring to EN 60204-1.

 

UL requirements for the NAFTA market. To main-
tain the UL environmental rating Type 2, the en-
closure openings shall be closed with fittings 
rated UL Type 2; 3; 3R; 3RX; 3S; 3SX; 3X; 4X; 
5; 6; 6P; 12; 12K or 13. Gas solenoid valves 
shall be protected by a branch circuit protective 
device not exceeding 15 A.

 

When joining two valves, install a cable gland 
set, see accessories, cable gland set for double 
solenoid valves, between the connection boxes.

4

3

First push 

through the 

knock-out – 

then unscrew 

the cover!

 

If the M20 cable gland or plug is already fitted, it 
is not necessary to push through the knock-out.

M0 cable gland

(+)

LV1

N

(-)

LV1 N

LV1

N

(+)

(+)

(-)

(-)

5

6

7

8

9

(+)

LV1

N

(-)

LV1 N

LV1

N

(+)

(+)

(-)

(-)

5

6

7

8

9

Plug

LV1

V1

 (+) = black, LV1

V2

 (+) = brown, N (–) = blue

(+)

LV1

N

(-)

LV1 N

LV1

N

(+)

(+)

(-)

(-)

5

6

7

8

  When installing two plugs 

on a VAS with proof of closure 

switch: label the sockets and 

plugs to avoid confusion.

Summary of Contents for VAS Series

Page 1: ...Electrical interventions may only be carried out by qualified electricians Conversion spare parts All technical changes are prohibited Only use OEM spare parts Changes to edition 10 17 The following c...

Page 2: ...ve is not damaged during installation and operation Sealing material and dirt e g thread cuttings must not be allowed to get into the valve hous ing A filter must be installed upstream of every sys te...

Page 3: ...lenoid valve VAS 1 a DN 25 differential pressure orifice with outlet opening d 30 mm 1 18 must be inserted at the outlet of the pressure regulator In the case of pressure regulator VAx 115 or VAx 120...

Page 4: ...ing Type 2 the en closure openings shall be closed with fittings rated UL Type 2 3 3R 3RX 3S 3SX 3X 4X 5 6 6P 12 12K or 13 Gas solenoid valves shall be protected by a branch circuit protective device...

Page 5: ...re is a risk of interference between valve voltage and proof of closure switch voltage To make wiring easier the connection terminal for the proof of closure switch can be removed 1 3 2 LV1 N 1 3 2 LV...

Page 6: ...if the adjusting screw is overturned Setting the start gas rate on VAS L VCS L The start gas rate can be set by turning the damping unit a maximum of 5 turns There must be a period of 20 seconds betwe...

Page 7: ...VAS 2 3 use the small seal from the actuator adapter set and only one of the large seals VAS 1 3 10 11 Slide seal under the second groove 12 Position new actuator 13 Follow the reverse procedure when...

Page 8: ...4 5 3 10 9 Maintenance CAUTION In order to ensure smooth operation check the tightness and function of the VAS Once per year twice per year in the case of biogas check for internal and external tight...

Page 9: ...ion from the switching point during testing pursuant to EN 1854 Gas pressure switches 15 Bypass pilot gas valves 1 Disconnect the system from the electrical power supply 2 Shut off the gas supply 3 Pr...

Page 10: ...10 mm 0 39 at the outlet of the main valve if the bypass valve s outlet flange is designed as a blind flange For the pilot gas valve insert sealing plug F at the outlet of the main valve if the pilot...

Page 11: ...s piloto ppna bypass eller t ndgasven tilen pne bypass eller tenn gassventilen Otev t obto kov ventil nebo zapalovac plynov ventil Otworzy zaw r obej ciowy lub zaw r gazu zap onowego Tightness control...

Page 12: ...nnect the system from the electrical power supply Shut off the gas supply 16 5 4 3 8 7 6 9 10 13 12 11 15 14 In both connection boxes push through the knock out for the cable gland set then remove the...

Page 13: ...AMSL Ambient temperature 20 to 60 C 4 to 140 F no condensation permitted Long term use in the upper ambient temperature range accelerates the ageing of the elastomer ma terials and reduces the servic...

Page 14: ...3 A VAS G 12 30 V DC 2 mA 0 1 A Switching frequency of proof of closure switch max 5 x per minute Switching current A Switching cycles cos 1 cos 0 6 0 1 500 000 500 000 0 5 300 000 250 000 1 200 000 1...

Page 15: ...in ac cordance with local regulations Disposal Components are to be disposed of separately in accordance with local regulations Certification Declaration of conformity We the manufacturer hereby decl...

Page 16: ...earch Class 7400 and 7411 Safety overpressure slam shut valves Designed for applications pursuant to NFPA 85 and NFPA 86 ANSI CSA approved Canadian Standards Association ANSI Z21 21 and CSA 6 5 UL lis...

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