Installation Guide

33
9) Pure water still tastes like Tap water:
The first thing to check would be if the reverse osmosis membrane was installed. The membrane is the
heart of the RO unit and it is the component that removes most of the contaminants and impurities in the
water. If the membrane is installed, please make sure the first 1-2 tanks of water have been completely
flushed out. The new filters on your system needs to be flushed out before use.
If the tank has been flushed out, use the TDS meter to check the tap water vs. pure water TDS. RO units
will remove 90-95% of contaminants and impurities in the water. If the pure water is not at 90% or
higher, please contact an APEC technician for assistance.
10) Air Bubbles: Lots of Air bubbles in cup or bottle when filling
It is quite normal to see air bubbles in a cup of pure water. This mainly occurs when a RO unit is first
installed or when filters are being replaced. When new filters are installed to the unit, the filter housings
are dry. When they are attached onto the RO head, air pockets will fill the housing. As water is turned on
and flows through the unit, the air pockets move throughout the system. This can have an effect on the
appearance of air bubbles in the water.
RO units will self purge the air bubbles that can accumulate inside the unit. As you continue to draw wa-
ter, trapped air will be removed by the water flow and you should quickly see a reduction in the bubbles
inside the water cup. You can also drain 1-2 tanks of water to quickly purge the air bubbles.
11) RO Makes Humming Noise
When RO makes a humming noise, most likely it’s caused by air bubbles being trapped in the “Check
Valve” during installation. See check valve on Fig. 17, point E (Page 28).
To purge air from the check valve, do as follows:
Step 1: Close the tank’s valve.
Step 2: Tilt the RO system to the right. Put something under the 3rd filter housing to keep RO tilted. This
helps dislodge the air bubbles from the Check Valve.
Step 3: Turn on the RO spigot. Let pure water flow throuh the spigot for about 1 minute. This forces the
air to flow directly out to the spigot, bypassing the tank.
Step 4: Turn off the spigot. Wait for about 10 seconds. Repeat Step 3 again. Do that 3-4 times. If you
see air sputtering out of the spigot, repeat Step-3 until pure water can flow smoothly from the spigot, or
until the noise goes away.
Step 5: When the noise is gone, open the tank valve, let RO run as usual.
33
9
)
Pure water still tastes like Tap water:
p
The
f
irst thin
g
to check would be i
f
the reverse osmosis membrane was installed. The membrane is the
heart o
f
the RO unit and it is the component that removes most o
f
the contaminants and impurities in the
water. I
f
the membrane is installed, please make sure the
f
irst 1-2 tanks o
f
water have been completely
f
lushed out. The new
f
ilters on your system needs to be
f
lushed out be
f
ore use.
If
the tank has been
f
lushed out, use the TDS meter to check the t
ap
water vs.
p
ure water TDS. RO units
will remove 90-95% o
f
contaminants and impurities in the water. I
f
the pure water is not at 90% o
r
higher, please contact an APEC technician
f
or assistance.
1
0
)
Air Bubbles: Lots of Air bubbles in cup or bottle when filling
pg
I
t is quite normal to see air bubbles in a cup o
f
pure water. This mainly occurs when a RO unit is
f
irst
i
nstalled or when
f
ilters are being replaced. When new
f
ilters are installed to the unit, the
f
ilter housings
are dry. When they are attached onto the RO head, air pockets will
f
ill the housing. As water is turned on
and
f
lows through the unit, the air pockets move throughout the system. This can have an e
ff
ect on the
appearance o
f
air bubbles in the water.
R
O units will sel
f
purge the air bubbles that can accumulate inside the unit. As you continue to draw
wa
-
ter, trapped air will be removed by the water
f
low and you should quickly see a reduction in the bubbles
i
nside the water cup. You can also drain 1-2 tanks o
f
water to quickly purge the air bubbles.
1
1
)
RO Makes Hummi
ng
Noise
g
When RO makes a humming noise, most likely it’s caused by air bubbles being trapped in the “Check
Valve” during installation. See check valve on Fig. 17, point E
(
Page 28
)
.
To
p
ur
ge
air
f
rom the check valve, do as
f
ollows
:
Step 1: Close the tank’s valve.
Step 2: Tilt the RO system to the ri
gh
t. Put something under the 3rd
f
ilter housing to keep RO tilted. This
he
lp
s dislod
ge
the air bubbles
f
rom the Check Valve.
Step 3: Turn on the RO spigot. Let pure water
f
low throuh the spigot
f
or about 1 minute. This
f
orces the
air to
f
low directly out to the spigot, bypassing the tank.
St
ep
4: Turn o
ff
the s
pi
go
t. Wait
f
or about 10 seconds. Re
pe
at Ste
p
3
ag
ain. Do that 3-4 times. I
f
y
ou
s
ee air sputtering out o
f
the spigot, repeat Step-3 until pure water can
f
low smooth
ly
f
rom the spigot, o
r
until the noise goes away.
Step 5: When the noise is gone, open the tank valve, let RO run as usual.