Water Control WHRO-700, Installation Manual

Page: 13 / 20

13
FILTER/MEMBRANE REPLACEMENT
1.
Turn off water supply to RO system by changing switching the valve control
from “run to “off”. The system will be depressurized when the feed pressure
gauge reads zero.
2.
Disconnect the locking bar and place the fittings (with tubing still connected)
into a tub or bucket to collect any water than may drain from the tubing.
3.
Move the system into a contained area, such as a sink or tub.
4.
Remove the support leg from the three sumps and unscrew the top sump as
shown (Figure 5) to access the pre-filter element. The support leg functions
as a wrench to loosen/tighten the sump.
NOTE: Do not disconnect the tubing from the fittings on the manifold. Remove
the locking bar and pull the fittings out. Lubricate O-rings with silicone
prior to reassembly.
NOTE: If only changing the pre-filter, the other two sumps do not need to be
removed. If changing the membrane elements, the pre-filter should also
be changed.
5.
Remove the exhausted pre-filter and discard
CAUTION : The person handling the filters and membrane elements must have
clean hands to keep the system sanitized. The use of sterile/latex
gloves is recommended.
6.
If changing the membranes:
a. Remove membrane sumps. Remove and discard used elements.
b. Remove new elements from packaging.
CAUTION : Elements contain a food grade preservative. The use of sterile/latex gloves is highly recommended.
c. Lubricate element O-rings, brine seals and sump O-rings with silicone lubricant.
d. Securely insert O-ring end of elements
into manifold (Figure 6)
e. Replace sumps and tighten until sump
bottoms out on manifold.
NOTE: The system should be sanitized whenever a
membrane element or filter is replaced.
7.
Sanitize the system.
a. The manifold should be positioned flat
with the sump connections facing up.
b. Pour a tablespoon (15 milliliters) of
chlorine bleach into the center opening
of the pre-filter sump connection (Figure
6).
8.
Install pre-filter.
a. Remove new pre-filter from packaging. Ensure gaskets are secure. Insert pre-filter into proper opening on
manifold.
b. Lubricate sump O-ring with silicone lubricant.
c.
With the pre-filter element in place, screw the sump into the connection. Tighten until it bottoms out on
manifold.
9.
Reconnect the fittings to the manifold and lock in position with locking bar.
10.
Turn drain flow control valve (gray valve with black circular handle) to the fully open position.
11.
Re-position the assembly onto the skid assembly and turn on the water supply back onto the RO. Turn the valve control
from “off” to “run” to supply pressurized water to the RO system. Verify there are no leaks.
a. Air will need to be bled from the system. Consult startup procedure to bring the system back into service. Allow
water to flow to drain for at least 30 minutes to flush out membrane preservative before adjusting the drain flow
control valve to re-establish the correct permeate-to-concentrate (product water-to-drain water) ratio, per table
2.0.
12.
The RO system is now ready for use.
Figure 5
Figure 6
Turn counterclockwise
to loosen
Pre-filter