Interlock
JA7 Operation ManualAfter switching on by pressing “Start”
- fan will start.
- Airflow will be checked by means of the air pressure switch.
Solenoid will open gas supply valve until
- right gas pressure is obtained
- or set time as elapsed (1-15 sec depending on the size of system )
Gas proving in progress |
Pressure will be monitored for set time ( 10 - 90 sec. depending on the size of system )
If pressure has been maintained over this test period, this indicates the system is gas-tight and the solenoid will reopen the main valve
Display will show
Working correctly |
If pressure as dropped main valve will stay closed
Display will show
Gas leak close open valve |
Sound every 3 sec.
Leak is cause most likely by open appliance valve.
Close open appliance valve and repress “start” button
If air flow is low, the “JA7” will reset fan speed to maximum speed
Display will show
Full fan Speed Control bypass |
Display will show
Alarm!! air flow too low Alarm!! |
Diplay will show
Gas supply Valve closed Air flow too low |
Air-flow-sensor self test
If the air-sensor fails, the unit will give every 10min. a “beeb” when interlock is switched off.
Display will show:
Failed air sensor Interlock Not working |
Gas engineer should be requested to repair/replace air flow sensor.
To force solenoid open Press and hold “start” and “stop” simultaneously for
5 seconds and release “stop” and then “start”.
Only to be done by authorised person.
Display will show
Valve
forced open Interlock bypass |
If this does not restores the gas supply the manual bypass valve can be opened by means of the handle (supplied but not mounted on the valve).
Only to be done by authorised person.
No display or signal will identify this situation!
Gas engineer should be requested to repair Interlock System.
Technifix has designed the Gasright JA7, please feel free to contact us for more information.