Maintenance - Whirlpool WHER25 Operation Manual

PREFILTER/POSTFILTERMAINTENANCE
NOTE:Itisrecommendedtoreplacethebattery,
prefilterandpostfiltercartridgesatleastevery6
monthsofproductwateruse.Replacemoreoften
iftheybegintoplugwithsediment.
The prefilter and postfilter are replaceable sediment
cartridges with activated carbon in their composition.
See Fig. 27. You must periodically replace the prefilter
and postfilter cartridge. This will protect the RO mem-
brane from being destroyed by chlorine. It will also pre-
vent the filters from plugging with sediment.
You may notice a slower output of product water as
the prefilter and postfilter build up with sediment.
Replace the prefilter and postfilter cartridges when this
occurs. You should replace the battery whenever you
replace the cartridges.
ROMEMBRANECARTRIDGEMAINTENANCE
The Reverse Osmosis cartridge is a tightly wound spe-
cial membrane. See Fig. 27. The membrane reduces
the dissolved solids and organic matter. The life of the
Reverse Osmosis membrane cartridge depends mostly
on the pH and hardness of the supply water (see
Specifications). Cartridge life is shorter with higher pH.
For example, if supply water pH is from 6.8 to 7.7, the
cartridge may last for well over one year. However,
cartridge life may be as short as 6 months if the pH is
as high as 8.5 to 10. Higher pH weakens the cartridge
membrane and causes pin-hole leaks. It's time to
replace the Reverse Osmosis cartridge when the pro-
duction rate and/or quality of product water drops.
Product water may begin to taste different, indicating
solids and organics are passing through the Reverse
Osmosis membrane. See Reverse Osmosis cartridge
replacement.
REVERSEOSMOSISCARTRIDGEREPLACE-
MENT
Complete the following steps to replace the cartridges.
NOTE:Donotremovemanifoldfrommounts.
Flexingortwistingmaydamagethemanifold.
1. Remove (turn to the left) the prefilter cartridge from
the manifold to stop flow to the Reverse Osmosis
cartridge.
2. Remove the Reverse Osmosis cartridge.
3. Remove the postfilter cartridge.
4. Discard the cartridges in a proper manner.
5. Install new cartridges in reverse order (post filter,
Reverse Osmosis and then prefilter). Turn cartridges
to the right to reattach to the filter heads. Do not
overtighten.
6. Remove and replace the timer battery. See page 14.
7. Purge the Reverse Osmosis system. See page 18
for instructions.

Maintenance

Registerforreminderstochangefilters
atwww.whirlpoolwatertreatment.com
Cover
Manifold
Prefilter
Cartridge
Cartridge
PREFILTER/POSTFILTERCARTRIDGE
REPLACEMENT
Complete the following steps to replace the cartridges.
NOTE:Donotremovemanifoldfrommounts.
Flexingortwistingmaydamagethemanifold.
1. Remove the prefilter cartridge (turn to the left) from
the filter head. Then remove the postfilter cartridge.
2. Discard the cartridges in a proper manner.
3. Install new cartridges in reverse order (postfilter first,
then prefilter). Turn cartridges to the right to re-
attach to the filter heads. Do not overtighten.
4. Remove and replace the timer battery. See page 14.
5. Purge the Reverse Osmosis system. See page 18
for instructions.
21
RO
Turn to the left
Postfilter
Cartridge
to remove
FIG.27