Specifications

23G-Series RO System
3024270 Rev G 77 14Oct13
Adjusting the Orifices - requires two wrenches and a large
screwdriver.
a. Use one wrench to hold the large nut and prevent it from
turning.
b. Use another wrench to loosen the locking nut, adjust the
flow with the screwdriver.
c. Tighten the locking nut after.
• While adjusting, make sure the pump boost pressure
(primary pressure less pre-filter pressure) reading never
goes outside of value listed in Section 1.8.4.
• Clockwise (in) increases primary pressure and
permeate flow rate.
• Counterclockwise (out) reduces primary pressure and
permeate flow rate.
WARNING:
Be careful not to unscrew the adjustment too far, or the screw will blow out
of the orifice and may cause injury.
It may be necessary to adjust orifices several times to attain
the proper settings.
Occasionally the permeate flow rate output of the machine
is too high, and cannot be adjusted low enough, even when
the recycle orifice is all the way open (unscrewed nearly all
the way out). This condition most often occurs right after
the membranes have been replaced, and indicates that the
permeate rate characteristic (flux rate) of one or more of the
membranes may be abnormally high.
• If the permeate conductivity reading is also abnormally
high (% rejection is low), the problem is most likely
caused by a bad O-ring seal in one of the membrane
housings.
• If the % rejection reading is normal or higher than
normal, then the membranes are good, but one or more
has a water product rate at the high end of product
specification range. Contact your equipment supplier for
assistance.