rev.1.1 Page 8-15
8.2.3 Confirm all flows and pressures
1. Electrode flow is 0.35 gpm/Stack (80 l/h).
2. Dilute Flow is 7.5-20.0 gpm/ 1.70-4.54 m
3
/h per MK-2E, MK-2Pharm or MK-2PharmHT
Stack™; 2.5-6.7 gpm/0.57-1.52 m
3
/h per MK-2Mini or MK-2MiniHT Stack™.
3. Concentrate Bleed Flow is set for the appropriate recovery.
4. Dilute Feed pressure is at least 5 psi (0.35 bar) more than Concentrate Inlet pressure.
5. Dilute Product pressure is at least 5 psi (0.35 bar) more than Concentrate Outlet pressure.
8.2.4 Initiate DC power
1. Set current to 0%,
2. Set voltage to 100%, (maximum of 600 Volts for MK-2E, MK-2Pharm or MK-2PharmHT
Stacks™; maximum 300 Volts for MK-2Mini or MK-2MiniHT Stacks™.)
3. Slowly increase current to 2 amps/ E-Cell Stack™. If the concentrate conductivity is low, the
maximum current will also be low. As the concentrate conductivity increases, so will the
current.
Note: The Brine Pump is set in the “Off” position because the conductivity in the Concentrate
loop may be high enough to allow sufficient current flow. If the Concentrate loop
conductivity remains below 50 µS/cm after half an hour of operation, start the Brine Pump
by selecting AUTO (Below 50 µS/cm, current flow may be too low). The brine injection should
be ramped up very slowly to prevent a sudden conductivity increase and therefore a sudden
current increase through the E-Cell Stacks™, which could blow a fuse.
E-Cell Stacks™ are shipped in regenerated form but they could be exhausted to certain
degree during startup activities when water is passed through them without current.
Therefore, it may take some time until the stacks are fully regenerated and produce water of
required quality (typically it takes few minutes).
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