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Safe Isolation Process
As described above the system is designed to have mains power and compressed air
supply ON once commissioned. However, there will be times when you must isolate the
system to move, or maintain equipment, in this case the procedure below should be
followed, referring to Pneumatic System diagram (Figure 7).
To Isolate the Gas supply to allow work on the application:
1. Close valve (6). This prevents any N2 gas from leaving the system. Allow the i-Flow
control system to operate normally. It will detect there is no demand for N2 gas and
will put the i-Flow and Dryer into a standby mode.
2. Pressure should be vented downstream of Valve (6) to allow work to be carried out
safely.
3. Once work is complete open Valve (6) slowly to reconnect the N2 Supply.
To Isolate the system for Service & Maintenance:
1. Close valves (6) and (1). Then close valves (3) and (4).
2. Turn the mains power OFF to the Air Dryer /Filtration & i-Flow Generator unit.
3. Remove the blank plug from and Open Vent valves (2) and (5), allowing the line
pressure to dissipate.
4. Open the service panel to the i-Flow Generator and discharge the residual generator
pressure via the top of the safety relief valve (NOTE: this is an unscrew mechanism,
so tools should not be required to operate).
5. Allow 30 minutes for the pressure to fully dissipate and leave vent valves open for
the duration of the service work. (NOTE: Once work has been completed close
the safety valve in generator, close vent valves (2) & (5), replace blank plugs, then
reopen valves (3), (4), (6) & (1) - then you can turn on mains power again & restart
the system).
To Isolate the system to move to a new location:
1. Close valve (6) and (1).
2. Turn the mains power OFF to the Air Dryer /Filtration & i-Flow Generator unit.
3. Open drain valve (7) at the bottom of the N2 Process Tank, allowing the pressure to
dissipate from the tank.
4. After 30 minutes remove the blank plug from and open valves (2) and (5) to ensure
line pressure has dissipated.
5. Leave the drain/vent valves open for the duration of the service work / transport
(NOTE: Closing the drain/vent valves may result in slight pressure build up from the
natural venting process of the carbon sieve in the i-Flow Generator unit).
Once planned service, maintenance or relocation have been completed the system
can be re-connected to the mains supply and the Commissioning / Start-up process
described earlier should be repeated.
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