4
System details
SEC-K
18.
Timer adjustment for fan commissioning, allows timed period for gas installation commissioning.
19.
Auto stop timer to isolate gas after set length of time. Factory set for model & use
20.
CO2 alarm level adjustment depending on application. Factory set for model & use
21.
High pressure low cut out adjustment
Gas Fill Time.
The Fill Time should be set such that there is sufficient time to fill an empty pipe work system to
full / normal pressure while ensuring a minimum escape of gas where a leak exists.
Gas Prove Time.
This should be set such that the smallest leak can be detected. This time can be set up to a
maximum of 99 seconds. Increasing this time effectively makes the system more sensitive to gas leaks.
(Factory default setting is 50 seconds). An extra 60 seconds prove time can be added onto the 99 seconds
by adjusting the DIP switch under the options bank, see
No 16
.
15.
BMS Relay PCB. Two relays, for connection to a BMS to indicate, high & low alarm, gas on, EM stop. (One selectable from each
relay) Max switching 48 volts 1 amp
HAL - High alarm
GON - Gas On
EST - Emergency stop
ALT - Low Alarm
Fan comm.
To enable the commissioning of the gas portion of the system before the ventilation interlock is completed to you may temporarily
disable the interlocking by pressing button 22. This will bypass the ventilation interlock allowing the gas to be tested, the system
must not be left in this state and as such is only this for a maxim 24hour period but auto exiting.
While in commissioning mode the
display will show the message “Not to current standards”
. Pressing the button again at anytime will cancel commissioning mode.
Learn Field devices
Any gas detectors connected to the system will require “learning”. First ensure all detectors are set to a unique ID address using
the selector switch on the detectors themselves. Having addressed each detector press the learn field devices button (23), the sys-
tem will scan and store any connected detectors. To verify that all detectors have been successfully learnt press the “blind button
B” on the front panel to view address details.
A B
Press button A
To display the gas pressures and view the set pressure proving set times.
Press button B
To display the gas installed gas detectors 1-8 press A & B together to view 9-16.
Fire Test Mode (Press button B three times)
When connected to a fire alarm panel using the fire alarm terminal (no.13) the system will isolate the gas during an fire alarm.
If for the purposes of a fire test you wish to temporarily disable this interlock the SEC system can be put into a “fire test mode” by
pressing blind button
B
three times in quick succession. This is a timed feature and will auto clear after 45mins. Press again three
times to manually clear and return to normal running.
