English (GB)
22
7.4 Weekly
• Check the level of brine tank (A). Re-fill with salt, if necessary.
• Check for water hardness by viewing the electrolyser cell (1)
when not in operation. There should be no scale present.
If required, a water hardness test on the softened water can
be done. See section
6.5.1 Checking the water hardness
.
• Check for leakages, renew O-rings, gaskets etc. if required.
• Check all vent pipework and air dilution fan (19) for correct
functioning.
• Check that the degassing column (2) is always full of liquid.
7.5 Monthly
• Visually inspect electrodes in electrolyser cell (1).
Only acid-clean, if significant scale has built up. See section
.
– Unless there is a softening fault, or poor quality water/salt is
being used, there should be no need to acid-clean more
frequently than at the two-year maintenance.
• Check filter in pressure reducing valve (10) and clean, if
required.
• Check electrical connections for signs of overheating and
tighten, if required.
• Check that the protective insulation is installed properly.
7.6 Every 2 years
• Overhaul solenoid valve (5). Replace any worn or damaged
parts.
• When solenoid valve (5) is closed, check that no water
passes.
• Clean flowmeter (6) if required.
• Overhaul brine pump (3).
– Clean and replace worn valves/seats and diaphragms, if
there is any sign of damage.
– Fit new O-rings and gaskets before reassembling.
• Check brine valve (14). Replace if necessary.
• Wipe down and clean brine tank (A).
• Check operation of floater valve (21) in brine tank (A).
7.7 Cleaning
If necessary, clean all system surfaces with a moist and clean
cloth.
7.8 Acid cleaning
1. Switch off power supply at switch (29) and isolate system from
the mains voltage.
2. Connect hose to product sample valve (H) and run to a
suitable discharge point.
3. Open product sample valve (H) to drain the degassing column
(2).
4. Connect hose between soft water sample valve (F) and
electrolyte sample valve (G).
5. Open electrolyte sample valve (G).
6. Open soft water sample valve (F) to flush electrolyser cell (1)
for 5-10 minutes.
7. Shut off soft water sample valve (F).
8. Connect the acid cleaning pump output to electrolyte sample
valve (G).
9. Attach hose to product sample valve (H) and back to acid
cleaning kit.
10. Start pumping acid through system until electrodes are clean.
– typically 5-10 minutes maximum
11. Once electrodes are clean, stop acid cleaning pump.
12. Remove the acid cleaning kit.
13. Move hose connected to product sample valve (H) to a
suitable discharge point.
14. Reinstall hose from soft water sample valve (F) to electrolyte
sample valve (G).
15. Open soft water sample valve (F) to flush electrolyser cell (1)
for 5-10 minutes.
16. Close valves (F), (G), (H) and remove hoses.
17. Wipe up any drips.
18. Restart system according to
Warning
Danger of explosion!
When checking the equipment for leakages only use
hydrogen detectors!
Never use a match or any type of flame!
Warning
Wear protective clothing and goggles and use the
Grundfos acid cleaning kit!
Caution
Hydrochloric acid used for acid cleaning must be of
high grade, free from fluoride and in the
concentration range of 5-7 % by weight!
Caution
Product sample valve (H) must remain open at all
times during the acid cleaning procedure!
