Nortec NHDI - Manual (Page 21)

Minor Maintenance
When The yellow LED flashes and the
message “minor servicing due”
appears, alternating with the normal
operation indication.
Work Carry out the periodic inspection items.
Empty the steam cylinder and clean the
scale collector tank.
Major Maintenance
When The yellow LED flashed and the
message “major maintenance due”
appears, alternating with the normal
operation indication.
Work Carry out the periodic inspection items.
Empty the steam tank.
Clean the scale collector tank (NHSC
Only).
Dismantle and clean the steam
cylinder.
Dismantle and clean the liner (NHSC
Only).
Clean the unit inner chamber.
Inspect the components inside the unit
for damage.
Resetting Minor and Major Maintenance
In order to return the steam humidifier to normal
operation after minor or major maintenance is
complete, you must press and hold down the drain
switch while turning the unit in the OFF position for
approxiamately 10 seconds. Then turn the unit switch
back onfor 10 seconds and release the drain switch
and the LCD message will return to normal.
DISMANTLING AND REASSEMBLY WORK
Removal of the scale collector tank - NHSC Only
Caution! Before commencing any dismantling
work, the humidifier is to be taken out of operation as
previously described.
NOTES ON CLEANING - NHSC Only
Cleaning the steam cylinder, scale collector tank,
and steam cylinder liner.
Whenever possible, clean off any mineral coating
that has formed.
Wash parts with lukewarm soap suds and then
rinse off well. Note: if the components are heavily
scaled, place them in 8 percent formic acid until the
scale has dissolved. Then treat components as
previously described.
Cleaning the heating elements
Immerse cover with heating elements fitted to 1”
(2 cm) below the rim of the cover in a container with 8
percent formic acid. Ensure electrical wires do not
make contact (do not fully submerge). Allow the acid
to take effect until the scale coating has dissolved.
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Turn unit off.
Drain unit and scale tank.
Unlock support bracket by removing locking screws.
Open both mechanisms by rotating counter clockwise until opening is visible.
Place scale tank on support bracket.
Rotate bracket to close mechanism and raise scale tank. Note ensure scale
tank lines up with opening at the bottom of the drain pan when raising.
Lock mechanism by re-inserting the two locking screws.
Figure #22Scale Tank Removal