Name

Automatic gas shut-off device operator

Model

VAC-300T（For large caliber City gas）
VAC-300P（For small caliber LP gas）
VAC-310T（For large caliber City gas）
VAC-310P（For large caliber LP gas）

Doc. Name

Product Specifications

Azbil Kimmon Co., Ltd.

Document n°

Rev

KM-VAC3-010

1

Automatic Gas Shutoff System Operator Specifications
For city gas

Purpose of use

VAC-300T

VAC-310T

VAC-300P

VAC-310P

small caliber(25A、32A)

Large caliber

Small caliber

Large caliber(40A、50A、80A)(20A、25A、32A)(40A、50A、80A)

KCV-2-40TKCV-2-20

KCV-2-40P

KCV-2-50T

PKCV-2-25P

KCV-2-50P

KCV-2-80T

KCV-2-32P

KCV-2-80P

Type
Applicableshutoff valve
caliber
Applicable shutoffvalve type

For LP Gas

KCV-2-25T
KCV-2-32T

１．input signal
Itemalarm signal

Specification
Stationary
Gas leakＣＯ detection
Shutoff
Alarm failure

Remark

ＤＣ ６Ｖ
ＤＣ１２Ｖ
ＤＣ１８Ｖ※０Ｖ
０Ｖ

External device signal input 1 a-contact (contact capacity 24

VDC, 0.1 A or more)
External device signal input 2

Remote open/close signal

Connect up to 3 lines

Duct fire signals, etc.
when activated 「ＯＮ」When "ON" function is closed
When "ON→OFF" shutoff activateda-contact (same as above)

Gas pressure drop signal

b-contact

Valve answering signal

a-contact

When pressure drops 「ＯＦＦ」※ Refer to the shutoff valve (KCV)
spec. for the detected pressure value.

When valve opened 「ＯＦＦ」
When valve closed 「ＯＮ」
※ For CO alarms for city gas

２．Output signal
Item
24V DC Alarm power supply

state output

Specification
ＤＣ２４Ｖ ０．４５Ａ

a-contact(Contact capacity: DC30V, 20W)

RemarkUp to 3 units can be connected・Output when valve is closed (forshutoff valve open/close indicationpanel)
All valves closed「ＯＮ」

Select "Output at valve close" or Valve opened「ＯＦＦ」"Output at error" by setting
・ Output in case of abnormality (forswitch
centralized monitoring system)
Gas leakage「ＯＮ」
Low pressure「ＯＮ」
Ext. device signal input「ＯＮ」
Minor leakage detection「ＯＮ」※ Normal open/close operation 「 ＯＦＦ」

※Normal open/close operation ...... by front panel switch and remote open/close signal
- 1 -

Item
Pulse output forshutoff valve

Specification
Valve open
ＤＣ２４Ｖ（Small caliber）
ＤＣ４５Ｖ（Large caliber）
Valve closeＤＣ１２Ｖ （Both large andsmall caliber）

Signal lines(e.g., shutoffvalves)

Valve coil (+) Red
Valve coil (-) Black
Valve Answer WhiteGas pressure GreenG line Yellow(G wire and connection ofshutoff valve)
FG line Green(Connect to FG terminal ofother reporting devices)

RemarkThe output signal at valve
opening is different forlarge and small calibervalves.

(Note) [In a system that is notconnected to other reporting
devices, both the G line andthe FG line should be left
open and not used.
When using the system, please consult
with the gas supplier or systemmanufacturer before use.
City gas shutoff valve: VCTF 0.75mm2,4 cores
LP gas shutoff valve: VCTF 0.75mm2, 5coresline resistance

Valve opening
condition

Restart safety check

Within 3Ω (reciprocal)
Within 50m of 0.75mm2 (lamellas)
1.25mm2 within 80m (lane)(*)2.0mm2 within 130m
(lane) (*)3.5mm2 within
250m (lane)

Must be strictly observed(*)Direct connection of thickcables is not allowed.

When receiving a remote open/close
signal from the "open/close"
button, remote open/close switch,etc., when confirming the returnsafety, and when confirmed.
Gas injection time to secondary sideApprox. 3 sec.
(Valve opening time)
Secondary side pressure check time: 30
seconds, 1 minute, 2 minutes, 3 minutes, 5minutes (changeover by setting switch)- 2 -After injecting gas into thesecondary side, check thepressure retention with anarbitrarily set check time.

ItemSpecification

RemarkWhen a gas leak signal is received continuously
for approximately 40 seconds or longer.

Valve closing condition【Abnormal Alarm Shutdown】

When the CO detection signal is received
continuously for about 40 seconds or longer.

・In case of gas leakage
・When CO is detected

When connected to an
alarm for city gas

When the gas pressure drop signal is received
continuously for more than 5 seconds.

・When gas pressure drops
・External device input
・When built-in seismic sensor
is activated【Normal shutdown】
・Manual shutoff

When an external device input signal is received
continuously for 1 second or longer.
When the built-in seismic sensor receives an ON
time of 2 seconds or more continuously, or whena seismic pattern is received.

Equivalent to intensity
5 (80 to 250 gals)・Remote Shutoff
When a close signal is received by the "open/close"
button on the actuator.

・Restart safety check inprogress

When a closing signal by a remote switch isreceived.

３．Setup switch
Item

Specification

Return safety check time

３０seconds,１min,２min,３min,５min

Built-in Seismic Sensors

ON／OffAlarm 1

ON／

OFF

Alarm２

ON／

OFF

Alarm３ON／

OFF

State output

Valve closed (For shut-off valve open/closeRemark
ディップスイッチによる切り替え注意）
切り替えは電源オフ時に行うこと。電源オン時に切り替えても反映されません。

indication panel, etc.)
In case of abnormality (for centralized monitoringsystem, etc.)□：初期値（工場出荷時）

４．Display, buzzer
Item
１）LCD

２）Panel switch３）Buzzer

Specification
Valve open/close status,abnormality and cause of shutdown
are displayed in kanji andalphanumeric characters.
Button switch
・Open/Stop" for shutoff valve
operation・Reset "buzzer/alarmElectronic buzzer continuous
sound- 3 -RemarkAll lights on for 5 seconds whenpower is turned on

Sounds when abnormality
alarm is shut off,abnormality is detected,
or valve open/close
operation fails５．Accessory Functions
ItemSpecification

Remark１）Minute leak detection

When the secondary side pressure drop signal Valve open/close status output "ON" 15is received within about 15 minutes after minutes after valve closing when valve
the manual or remote close signal is open/close status output is set to abnormal
received, the alarm is displayed from that statusoutput(centralizedmonitoring
point on.
system using telephone line, etc.)
However, this function will be deactivated※ Refer to the shutoff valve (KCV)
when the open operation is performed within specifications for the detected
15 minutes.
pressure value.
２）Detection of wire breakage and Alarm with buzzer and LCD display
Real-timeanswer failure (open/close operation ・Disconnection between alarm and actuator During open/close operation
・Valve solenoid disconnectionfailure)・answer failure３）Alarm input and external
device input identification

Alarm input number (1 to 3), and External
device input number (1-2)４）at the time of a power outage

Shutoff valve maintains pre-power failure
condition
One time only
If the following shutoff signals are※ After 10 years of use, depending on ambientreceived within approximately 15 minutes*
after a power failure, the valve is shut off temperature and other factors, the time may be・Manual closing ・External device signals less than 15 minutes.
Replacement should be made after 10 years.
・remote closing ・Pressure drop signal
・Seismic sensor signal
Memorizes and displays the three most recent The history is cleared when the backup
histories of abnormal alarm shutdowns
function expires.
(excluding normal shutdowns)
Please refer to the valve closing
conditions on P.3 for the details of theabnormal alarm shutoff.

５）Backup Function６）Interruption history display
function

７）Power switch

AC power on/off (not normally used, always
on, used for periodic inspections, etc.)

Can only be operated with the terminal
block cover removed. (Slide switch)

６．Other Specifications
ItemSpecification

Remark１）Power supply

ＡＣ９０Ｖ～１２０Ｖ
５０Ｈｚ／６０Ｈｚ２）Power consumption

Maximum 8W３）Operating temperature range－１０℃～＋５０℃４）Operating humidity range

８５％ＲＨ以下５）Dimensions

１２１Ｗ×２０１Ｈ×５６Ｄmm６）WeightApprox. 700g (main unit only)

Mounting plate about１５０ｇ７）Installation

Wall-hung type with attached mounting plate.
(To maintain the performance of the seismic
sensor, mount the unit within ±3° ofinclination.)

Conforms to JIS C8340 for 2 switch boxes８）Material

Main parts are noncombustible or flame
retardant９）Accessory

Mounting and operating manual (with warranty)
Mounting plate (with level)
Countersunk screws for mounting plate (4 pcs.)
Truss screws for mounting plate (4 pcs.)１０）Guaranty

1 year１１）Durability

10 years

When using the 24V alarm- 4 -About the type of actuator
ＶＡＣ－３ ０ ０ Ｐ①② Ⓒ ④ ⑤
Ex：
ＶＡＣ－３１０ＰFor LP Gas
Type 3 large ⇧ caliber①Actuator②3:3 TypeⒸO: Small ⇧ diameter(25A,32A)
1:Large ⇧ diameter(40A,50A,80A)④O: 0 fixed⑤P: For LP Gas
T: For city gas

About the type of shutoff valve
ＫＣＶ－２－４ ０ ＰＦ①②Ⓒ ④
Ex：ＫＣＶ－２－４０ＰＦ
For LP Gas①Shutoff valve②2:2 TypeⒸ2 Digit number: ⇧ diameter④ＴＢ：For city gas (gas category I)
ＴＡ：For city gas (gas category II)
PF: For LP gas (gas category III)⇧ caliber 40A type 2shutoff valve

Standard set pressure value for shutoff valve
type suffixCategorygas type
４Ａ,５ＡＮ,５Ａ,６Ａ,４Ｂ,５Ｂ,６Ｂ,４Ｃ,５Ｃ,６Ｃ,７Ｃ

Set value

ＴＢ

Gas Type
Category I

City gas

ＴＡ

Gas Type
Category II

City gas
１２Ａ、１３Ａ
natural gas

686～980 Pa{70～100mmH2O}

ＰＦ

Gas Type
Category III

ＬＰgas

1.37k～1.62k Pa{140～165mmH2O}

ＬＰＧ

- 5 -

196～490 Pa{20～50mmH2O}

Revision History
Revision
Date200610201204Document
No.
KM-VAC3-010

Revision
No.
01

Revision page Revised Contents

front cover- 6 -first edition
Company name change, cover change