Maintenance
Manual_Grid_Power_FNC_en_V3_0
47
2. Refill the electrolyte levels with distilled water to the maximum level.
1 = Glass tube for measuring
2 = MAX electrolyte level
3 = Top of separator
4 = MIN electrolyte level
H1 = Height from open cell plug to
MAX electrolyte level
H2 = Reserve of electrolyte between
MIN and MAX label
H3 = Measurable electrolyte height
range
Maximum electrolyte levels according to the cell type (to distinguish by the enclosure
height):
Enclosure height [mm]
Maximum level measured with the
glass tube for measuring [mm]
217
19
276
36
373
55
ATTENTION!
Use only distilled water in accordance with EN 60993 for topping up the battery cells.
Filling the cells with acid or acidic water destroys the cells of the FNC
®
batteries.
Tap water impairs the battery performance.
3. Clean the battery system if necessary, see
10.5 Cleaning on page 45.
4. Keep a log of your maintenance activities, see
13.2 Maintenance Log on page 57.