A.O. Smith ADR75-V-ET-1 User Manual page 18

2) The estimated filter life of this purifier is calculated based on household use. Please do
not use this purifier in a public place with much higher water consumption. In those
cases, we recommend that you choose our commercial model.
3) Based on the assumption that the feed water is municipal water and daily water
consumption is 12.5L, the suggested filter life is as follows(below data is for reference
only):
1st stage:
2nd stage:
3rd stage:
4th stage: Reverse osmosis membrane
5th stage: Post activated carbon filter
Note: Since water quality exerts great influence upon filter life, and RO membrane life
is also affected by various factors, filter life might be higher or lower than above-mentioned
in reality, and thus above data is only for reference. The customer should consider
replacing filters under below circumstances:
◆ The taste of the pure water is bad and the TDS value has increased.
◆ The pure water flow has decreased. Check whether the filters or membrane are
blocked (make sure it is not because of low inlet water temperature).
◆ The filter is covered by mud or its color has changed.
◆ No pure water comes out of the water purifier.
2.How to Replace
Please call our hot line for filter replacement. After-sales service staff will help you
replace filter to avoid misoperation. The manufacturer is not liable for any losses caused by
improper operation, or operation not following instruction.
1) Replacement of the 1st and 3rd stage filter cotton and the 2nd stage front activated carbon
Firstly turnoff water inlet valve and unscrew corresponding filter cartridge with filter cartridge
wrench. Take out old filter and place new filters into the filter cartridges (note: dense filter
cotton is installed in the 1st filter cartridge; front activated carbon is installed in the 2nd stage
filter cartridge and the end with silicone cushion shall be upward; super dense filter cotton is
installed in the 3rd stage filter cartridge). Then tighten cartridge cover with wrench.
Before front activated carbon filter is replaced, flush it firstly to prevent activated carbon
powder from entering into the 3rd stage filter or RO membrane, which will damage filter and
membrane elements. The detailed operation procedures are as follows:
(1) Turn off inlet switch of water purifier.
(2) Remove the 3rd stage cartridge with cartridge wrench;
(3) Collect water at the 3rd stage filter cartridge cover with a big container;
(4) Turn on inlet switch and wait until the outlet water from the 2nd filter is not black
anymore;
(5) Turn off inlet switch, place the filter into filter cartridge and then tighten the 3rd stage filter
cartridge cover.
18
Stage
Granular activated carbon filter
Period
12 months
24 months
24 months
36 months
12 months