HydroLogic micro75 User Manual

micRO75

Compact Reverse Osmosis System

75 GALLONS PER DAY

User Manual

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Warranty:

A One Year Warranty comes with each unit against manufacturer’s defects. This does not

include clogged filters due to lack of regular maintenance or excessive sediment and/or con

­taminants in water. This warranty also excludes damage to units caused by using the unit
outside of the specified parameters. Do not operate unit if incoming pressure exceeds 90 psi
or there is problem with water hammer spikes. If unsure of water pressure, check with a pres

­sure gauge available at your dealer or hardware store. Install the optional pressure regulator
if inlet pressure is above 90 psi.

Do not contact your dealer or distributor for warranty issues.
Contact Hydro-Logic directly.

Tech Support / Contact:

If you have a particular application or setup question, you can call or
email Hydro-Logic:

[e-mail]

1-888-H2O-LOGIC

(1-888-426-5644)

Visit us on the web at:

www.HydroLogicSystems.com

Important Information on Reverse
Osmosis Filters:

Reverse Osmosis is the most cost effective and efficient way to
remove 98%+ of all contaminants from your water. The key com­ponent of the system is the RO membrane that is tightly wrapped
sheets of a semi-permeable material. Under pressure the mem­brane allows pure H2O to pass through it and rejects, or flushes
away, most impurities down the drain. That is why all RO systems
have a certain amount of waste water. The ratio of waste water is
determined by the restrictor used on the drain line. The micRO75
is designed to run at a ratio of 2:1 ( 2 parts drain to 1 part product
water) being about 50% more efficient than similar RO systems.

The flow of water is determined by inlet pressure, inlet tempera-

ture, and inlet PPM’s. The micRO75 has the capacity to produce
75 gallons per day, with inlet water at 77º F, 60 PSI, 500 PPM. The

higher the inlet pressure and temperature, the better the flow. You
will notice in colder areas or in the winter when water tempera­tures are lower that the water flow can be slower. A minimum of
40 psi is required to properly operate the system.

Inlet water that is very high in total PPM or very hard with calci­um or magnesium may shorten the life of the membrane and/or
cause slower flow rates. The RO membrane included with the filter
can handle water up to 1000 PPM and with a hardness of 170
PPM or 10 grains of hardness per gallon. Note that this is consid­ered both very contaminated and very hard water and may short­en the life of the membrane. At these levels of contamination and
hardness, and especially beyond, you may consider pre-treatment
in the form of a water softener or other equipment. Please contact
HydroLogic for more information.

All RO systems exhibit “TDS creep”. The first few ounces of RO wa­ter produced are higher in PPM than after the system has run a few
minutes. Take any PPM readings a full five minutes after turning
the system on to assure accuracy.

1

Description:

The micRO75 is a customized Reverse Osmosis water filter that is capable of removing up
to 98%+ of most contaminants. The system is designed for use with hydroponic or horticul

­tural applications, but can also be used effectively in a variety of other settings as well. The
filter is built to give the maximum amount of flow from the membrane while sending less
waste water to drain, compared to similar RO filters. Please read the following setup and
maintenance guide to get the maximum results from your filter and your plants.

The micRO75 unit includes:

• 1 RO Membrane

• 1 KDF/Carbon Pre-Filter

•

Wall/Floor Mount Bracket

• 6 Feet of 1/4” Feed, Product and Drain tubings

• Garden Hose Connector for the Supply Line

• 1/4” Inline Shut-off Valve

• Auto Shut Off Valve

• External Flow Restrictor

• Pressure Gauge with Safe Operating Zones

Optional accessories available
at your dealer: See page 8

• DI Post Filter #HL22072

• Ultra-Violet sterilization post-filter #HL35015

• TDS monitor #HL19006

• Float Valve - For use when filling reservoir unattended #HL27015

• Booster pump for inlet pressure below 40 psi #HL29060

Special note on chloramines:

Chloramines are a disinfecting agent that is being added by some cities to the water sup­ply place of, or in addition to, chlorine. They are a much more stable form of chlorine and
do not dissipate from letting the water sit out. They cause the same damage to all living
things as does chlorine. Manufacturers of carbon block filters, such as the one that comes
standard with the

micRO75

, do not make specific claims for chloramines removal. If

you are sure your water supply contains chloramines, be sure to always use KDF85/

catalytic carbon filters.

2

Your micRO75 has some simple plumbing that consists of quick connect push in
fittings and food grade tubing.

Insert tubing into proper fittings. The White inlet tubing (with garden hose con­nector) goes into the right side of the top canister (#2, above). The Blue tubing
goes into the Product Water fitting, immediately after the shut off valve. The Black
Drain tubing fits in the waste water line, immediately after the flow restrictor.

Note: The 1/4” Inline Shut-Off Valve can be installed anywhere on the Blue RO

tubing. This allows you to shut down the entire system, including the drain line.
Make sure you make a clean, square cut in the tubing. Use sharp scissors or a
blade.

Thread the garden hose connector onto an appropriate source (40 psi, minimum).
Your dealer has options that allow connections to your other existing plumbing.

Flush the system for 30-45 minutes to remove the food grade preservative that
the membrane comes shipped with. You are now ready to use your system.

1

3

9

2

4

5. Blue product water line

6. Black waste water line

7. Automatic shutoff valve

8. Flow-restrictor

9. 1/4” inline shut-off valve

1. Carbon/KDF Pre-filter housing

2. Tap water inlet

3. RO membrane housing

4. Wall/floor mount bracket

micRO75

®

Setup:

3

5

6

7

8

Membrane/Filter Changes:

It is essential that you keep the micRO75 pre-filter changed often.
The filter has a rated life of approximately 1,000 gallons of Reverse
Osmosis product water. The membrane usually lasts 6-18 months
depending on the quality of your tap water and how often you
change the carbon/KDF pre-filter. Additional pre-filtration may be
necessary depending on the quality of your tap water.

Filter Housings:

• Housing - Reinforced Polypropylene

• O-Ring - NBR

• Maximum Temperature - 100 °f

• Maximum Pressure - 100 psi

Carbon/KDF Pre-Filter Cartridge:

• 100% Coconut shell Granular Activated Carbon.

• KDF 85 media for chloramine reduction.

• Up to 99% chlorine reduction.

• FDA grade components & materials.

micRO75 Membrane #HL 22074

micRO75 KDF/Carbon Filter #HL 22073

4

Changing the micRO75 Membrane

The Reverse Osmosis membrane should be changed about once a year, but may be more
or less frequently, depending on water quality. If your water is really dirty then you may
need to change the membrane more often. If your water is relatively clean and you keep up
with your pre-filter changes, the filter may last 1.5+ years. The only way to truly know is to

test the RO and inlet water and see what percentage of the inlet water’s PPM the micRO75
is filtering out. You should see at least a 94% rejection of incoming PPM’s.

Another indication it is time to change your membrane is if your flow rate of product water
slows down. This typically means the membrane has become clogged.

Changing the RO membrane is
an easy process. First, depressur­ize your system by shutting off the
water source to your micRO75
unit. Then remove the elbow fitting
(as shown) by pushing in the collet
and removing the elbow. NOTE:
Be sure and have a bucket and
towel handy when you change the
membrane, as there will be residu­al water in the housing.

Grab a hold of the membrane housing’s body with one hand, and the cap with the other

hand and twist cap off.

You can now remove the membrane
with either a strong set of needle-nose
pliers or something similar. Hold onto
the membrane housing body and
pull straight out until you release the
membrane. It may seem tight but with
straight and even pressure, it will come
out.

Before installing a new RO mem­brane you should lubricate (with sili­cone grease or water) the black rubber gasket that is closest to the inlet, as well as the two
small o-rings on the stem opposite the gasket. This will help the membrane seat better and
come out easier. Push the membrane back into the housing with the end that has the two

black o-rings going in first. Push firmly until it bottoms out and can’t go in further. Then

thread the cap back on tight, re-connect elbow fitting and you are ready to flush the system
for 30-45 minutes before using.

5

Changing the Carbon/KDF Pre-Filter

Changing the KDF
Pre-Filter is very easy.
First, depressurize your
system by shutting off
the water source to your
micRO75 unit. Next, re­move the elbow fitting as
shown, by pushing in the
grey collet and removing
the elbow. Unscrew cap
with the filter attached.

The pre-filter then simply
unscrews from the cap, and
then the new filter screws
right back in. It is important

to make sure the rubber “O”

ring is seated at the bottom
of the threaded stem. When
installing the new filter, be
careful not to over-tighten.
Only a snug hand-tighten­ing in needed to make a

leak-proof seal

.

Seated rubber “O” ring.

Do not use with water that is microbiologically unsafe or of unknown qual­ity without adequate disinfection before or after the system.

Limited Liability: HydroLogic Purification Systems makes no warranties of any kind, expressed or im-

plied, statutory or otherwise and expressly disclaims all warranties of every kind, concerning the product
including, without limitation, warranties of merchantability and fitness for no particular purpose, except

that this product should be capable of performing as described in this products’ data sheet. HydroLogic

Purification Systems obligation shall limited solely to the refund of the purchase price or replacement of the

product proven defective, is HydroLogic Purification System’s sole discretion. Determination of suitability of

this product for uses and applications contemplated by Buyer shall be the sole responsibility of Buyer. Use
of this product constitutes Buyers acceptance of this Limited Liability.

6

Push In/Quick Connect Fittings:

Connecting Push-In Fittings:

Dis-connecting Push-In Fittings:

Push in collet

Push tube firmly into the fitting, all the way to tube stop. The collet (gripper) has

stainless steel teeth which hold the pipe firmly in position whilst the ‘0’ Ring provides

a permanent leak proof seal. Pull tubing to check for security. If some tube pulls out
then push all the way in again until it stops.

It is good practice to test the system prior to leaving site and/or before use.

Ensure system is depressurized by turning off source water before removing fittings.
Push in the collet evenly toward the fitting. With the collet held in this position the
tube con be removed by simply pulling You can use a collet release tool (available
from your dealer) or small crescent wrench. The fitting can then be re-used. If the
tube has been removed several times you may see score marks on the ends. This
can lead to leaks so cut the end off the tubing totally square with a sharp blade
using care.

Remove Pipe

7

Upgrade Options:

100% protection against bacteria, viruses, cysts and pathogens.

1/4” float valve allows unmonitored filling of reservoirs. No more floods!

UV Sterilizer Kit #HL35015

Booster Pump #HL29060

Float Valve #HL27015

TDS Monitor #HL19006

DI Post Filter #HL22072

Clips onto the

micRO75

as a final polishing stage.
Removes any last traces of TDS to produce ultra
pure water.

Measures unpurified water PPM going in to reverse osmosis
system and purified water PPM coming out. Monitors the
performance of your RO system. Instantly displays values
and allows you to switch back and forth between dirty and

clean water TDS. Indicates when it’s time to change the RO

membranes.

For inlet pressure less than 40 psi. Boosts pres

­sure to ideal levels for increased flow rate and
higher performance.

8

370 Encinal Street
Suite 150
Santa Cruz, CA
95060

ph: 888.H20.LOGIC
(888.426.5644)
fax: [phone]

[e-mail]
www.hydrologicsystems.com

pure water’s not magic
it’s logic