Duomo KS22 Manual - Halaman 2

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Halaman Cetak

Application

"Prior to light-up of manually operated plant, it is es-

sential to ensure that all manual valves on burners or

appliances are in the closed position. This can be per-

formed by permitting a small, and controlled, flow of

gas through a limiting orifice to by-pass the SSOVs.

If any of the downstream valves are not closed, the

pipework will not pressurise and, thus, the circuitry will

prohibit the opening of the SSOVs."

IGEM/UP/2 Edition 2 Installation pipework on industri-

al and commercial premises.

"Systems that do not use a controlled by-pass are not

considered to comply with this Appendix as the control

of entry/leakage of gas into downstream plant may not

be sufficient to ensure safety. The use of systems rely-

ing on the opening of a large SSOV to pressurise the

downstream system may lead to excessive release of

gas."

"The gas supply system shall be interlocked with any

mechanical ventilation supply or extract system and

this will normally require the fitting of an automatic

valve."

BS6173:200 Installation of gas fired catering applianc-

es for use in all types of catering establishments.

"Whenever an automatic electric isolation valve sys-

tem is used, an automatic system for proving that all

downstream gas supplies to the burners and pilots

have been turned of shall be employed prior to the

valve being re-energized to open."

In accordance with these requirements, the Trio Saf-

estart securely isolates and safely re-establishes the

gas supply to any area which relies on manual isola-

tion of gas outlets (e.g. in hotels, fast food restaurants,

schools, colleges and canteens).

Trio Safestart protects personnel and property from

damage caused by gas leaks. Inadvertently or inten-

tionally leaving manual gas taps open is dangerous,

even when the gas supply is turned off.

If the supply is reinstated with taps open an undetect-

ed gas leak will exist. The Trio Safestart prevents this

by checking the integrity of the downstream pipe work

before allowing the main gas to be opened.

The control panel ensures that only authorized, com-

petent personnel are able to initiate gas supply, thus

preventing vandalism and misuse of gas equipments.

If the supply gas pressure drops below a preset

threshold the system will automatically operate the

low pressure cut off and the gas will be safely isolated.

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Operation

Connect the Trio Safestart to a power supply. A self

test procedure will run. If a failure is detected the green

POWER light will blink and local buzzer will sound (1,5

Hz).

Enter numeric password (1 to 8 characters). At each

press the active key will turn to red and a short tone

will confirm the operation. Push the 

the code and run the proving test. (NOTE: In case of

incorrect password the buzzer will make a single long

tone (1,5 sec). If the password matches the buzzer will

make 3 short tones. Press the X at anytime to halt the

operation).

During the proving stage, the AIR light will flash waiting

for the extract and supply air to be proven within 30

seconds. Once the air is proven the it will stay ON.

The GAS light will flash until the gas test is completed.

A failure on AIR or GAS will enter an alarm condition,

the relevant light will blink and an alarm will sound. The

gas valve will be turned off and the system will require

a manual reset once the problem has been resolved.

At any time it is possible to close the GAS Valve and

reach a standby condition pressing the STOP button.

Password Setup

The Default password is 1, 2, 3, 4.

To enter password configuration mode

Press and hold keys 1, 6 and 7 together for 5 seconds

until the keypad backlight turns red.

Enter new numeric password (1 to 8 characters

length). At each press the active key will turn off

momentarily. Press the  to confirm the code.

3. Press the CANCEL key to exit configuration mode at

any time, leaving the password unchanged.

Duomo UK Ltd guarantees for two years from the date

of manufacture of its product to replace any product

or part thereof which is found to be defective from

manufacture or material failure. Duomo UK Ltd makes

no warranty of merchantability or any other warranty

express or implied. In no event shall Duomo UK Ltd

be liable for consequential or special damages of any

nature which may arise from incorrect application and

installation of this product.

When Duomo UK Ltd products are combined with

equipment manufactured by others and/or integrated

into systems designed or manufactured by others, the

Duomo UK Ltd warranty pertains only to Duomo UK

Ltd products and not to any other equipment or to the

combined system or its overall performance.

Fault Memory

The Trio Safestart features a unique 'fault memory'

system. When the unit goes into alarm, the cause is

logged in an internal memory. The next time the unit is

powered up, the last cause of alarm (either Power,

Air or Gas) will flash during the self diagnostic stage

allowing an engineer to quickly diagnose the fault on

site.

to confirm