Dosmatic MiniDos 0.4 User manual

1
MINIDOS®
Model No.
MiniDos - 0.4%, 2.5%, 5%, 10%, 20%
Installation & Operating Instructions
Certified ISO 9001:2000 Quality Management System

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CONTENTS:
CAUTION:
To reduce risk of injury, user must read and understand the Installation & Operation Instructions
before using this product.
ITEM PAGE
Introduction...........................................................................................................................................3
Safety.....................................................................................................................................................4
Installation..........................................................................................................................................5-7
Operation............................................................................................................................................8-9
Maintenance........................................................................................................................................10
Trouble Shooting.................................................................................................................................11
Repair Parts Motor..............................................................................................................................12
Specications.......................................................................................................................................13
Repair Parts Lower Ends................................................................................................................14-19
Wear Parts Kits...............................................................................................................................20-22
Warranty.........................................................................................................................................23-24
START UP PROCEDURES
SLOWLY turn on main water pressure until water ows between 5 & 12 gpm (11-45 lpm) or 30 psi
(2 bar) maximum to fully prime the suction hose.
SLOWLY open the water supply valve and all valves downstream of injector to release entrapped
air. Carefully open inlet valve allowing water to enter and pressurize the injector. Open outlet valve
and close bypass valve. Water will now ow through the injector, and a continuous sound will be
emitted from the injector as water passes through it. Check for system leaks (see page 5) and correct
if necessary. Adjust the outlet valves downstream from the injector, if necessary.
IMPORTANT:
FOR WARRANTY PURPOSES
VISIT OUR
WEB SITE
WWW.DOSMATIC.COM
TO FILL OUT PRODUCT
REGISTRATION FORM!
Part#013815 Rev E

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QUICK TIPS:
To maintain a long service life for your MiniDos injector
1. Always cover solution container and keep it clean
2. Always use clean water
3. Always lter inlet water
4. Always keep solution lter (#27) 2” from bottom of container
5. Always stock main wear parts for lower end
Trouble-shooting your Dosmatic injector
Injectors should make a gentle clicking noise when in operation
If the unit is not clicking, contact your authorized Dosmatic repair distributor or return the unit to Dosmatic USA,
Inc
If the unit is clicking, but not pulling solution, please inspect the lower end of the injector (see
lower end diagrams) as follows:
Exterior Inspection
1. Inspect and clean lter (#27)
2. Inspect the suction tube (#25) for cracks. Replace suction tube if holes exist
3. If injector still does not pull solution, please proceed to steps 4-7
Cleaning the suction tube tting
4. Remove pin #79 and carefully pull out the inner cylinder (#37)
5. Unscrew the suction tube tting (#11) from the inner cylinder (#37)
6. Clean and rinse suction tube tting assembly (#11). Replace any damaged parts
7. If injector still does not pull solution, please proceed to steps 8-12
How to replace wear parts
8. Unscrew the external cylinder (#7), separating it from the body of the injector
9. Take hold of the shaft (#51) and turn it 90 degrees in any direction to release it.
Pull shaft from its housing
10. If you have the 0.4%, remove the dosage piston (#44) by unscrewing dosage piston support (#52) from
lower shaft assy (#51).
NOTE: Due to the delicate nature of the 0.4%, extra care should be taken to monitor dosage levels, verify
solution is free of debris, and to perform wear maintenance regularly.
If you have the 1% or 2.5%, remove the dosage piston (#44) by turning the lower shaft (#51) one quarter
turn and pull down.
If you have the 5% or 10%, remove the dosage piston (#44) by depressing the two “ears” of the shaft
(#52) simultaneously and removing the piston upwards. Replace dosage piston by sliding a new #44 from
top to bottom of the shaft until you hear a click.
If you have the 20%, remove the dosage piston (#44) by unscrewing the capscrew (#93) and remove the
dosage piston (#44) by pulling down.
Clean and inspect O-ring (#14).
The translucent openings (larger diameter/thinner lips) of the dosage piston should be on top.
11. Clean, dry and inspect inside the inner cylinder (#37 or #7 if 20%) from scratches or cracks. If damaged,
replace inner cylinder.

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44
195008
195012 (2x)
195909
194309
010044
195444
190730
195200
195408
212005
195870
20% 011849
10% 011025
5% 011015
2.5% 010025
1% 010025
5% 011026
10% 011018
25
17
51
44
27 51
44
44 44
55
2.5% 011017
54
195871 195873
0.4% 011023
0.4% 003072
1% 011017
195950 95
93
51
44
2.5%
20%
10%
5%
1%
0.4%
INTRODUCTION:
Please take the time to read this instruction manual thoroughly and follow the procedures. This
will help increase the life of your injector.
Certain precautions, which are marked with this symbol need to be read carefully...
The injector is packaged with the following items: (shown in gure 1)
Dosmatic Injector (not shown)
Dosage Piston
O-ring
Manual (not shown)
Mounting Bracket
Mounting clips
Filter
Suction Tube
Fig.1

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SAFETY:
1.SELECT A LOCATION: that is on the water line that chemical injection is desired and meets all
the following requirements as well as all applicable local codes.
Remove Red Caps Prior to Installation.
NOTE: The entire water line down stream from the injector will have chemical injected into it. If
the chemical injected makes the water unsafe to drink, label the water lines.
WARNING NOT FOR HUMAN CONSUMPTION!
2. AN APPROVED BACK FLOW PREVENTOR MUST BE INSTALLED, in the water
line ahead of the unit to prevent water and chemical mixture from entering the source water supply.
3. AVOID A POTENTIALLY HAZARDOUS CHEMICAL ACCIDENT: An injector loca-
tion should be selected to provide a safe, but accessible, place for the chemical solution container. It
should be kept away from children and/or high usage areas.
4. AVOID SOLUTION CONTAMINATION, use only clean FILTERED water. Do not allow
contaminants to enter the solution container because they will be pumped into the water line, and
can cause the spread of disease and can also cause excessive wear.
5. WATER TEMPERATURE
Max: 100°F or 38°C
Min: 32°F or 0°C
6. MAX WATER PRESSURE
10% & 20% - 65 PSI/4,5 BAR
0.4% - 5% - 140 PSI/9,7 BAR
7. RELEASE WATER PRESSURE, before working on injector

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1.NOTE: Water going through injector must be free of sand, dirt and grit. Installation of 140 mesh
(104 micron) or ner lter will be required.
2. MOUNT INJECTOR: Securely to a solid object such as a wall. Note arrow on injector indicat-
ing water ow. See g. 4.
3. BACKFLOW PREVENTOR: Install one adequately sized that meets your local code require-
ments.
4. BYPASS VALVE: To bypass injector when not in service or to service injector pipe in the three
valve bypass arrangement as shown in Fig. 3
5. CHECK SYSTEM FOR LEAKS: Open the bypass valve (A), close valves (B) and (C) so that
the water will not ow into injector SLOWLY turn on the main water line so that water will
run through the plumbing system. Turn on all of the valves located downstream from your injector
to release trapped air. Slowly turn on the inlet valve (B). Open the outlet valve (C) at injector outlet.
Close (A). As water travels freely through your injector, you will hear a soft “clicking” sound.
6. SOLUTION CONTAINER: Refer to gure 5. You may use any size container but we recom-
mend using one with a lid or cover. To connect your solution container gently push the end of the
suction tube (#25) onto the bottom of the tting assembly (#11). Place the lter into the solution
container at least 2 inches (5cm) from the bottom. Cover the solution lter with at least 2 inches.
(5cm) of chemical solution.
INSTALLATION:

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INSTALLATION DRAWINGS:
50mm
2" Required
Solution Filter
Bypass Valve (Required)
Outlet Valve (Required)
Inlet Valve (Required)
Inlet Filter (Required)
Suction Tube
Covered Container
Fig.3
TYPICAL INSTALLATION
(A)
(B) (C)

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50mm
2" Required
Covered Container
Inlet Filter (Required)
Inlet Valve (Required)
Bypass Valve (Required)
Outlet Valve (Required)
Suction Tube
Solution Filter
10 Feet (3 Meters)
Minimum Water Level
195008 Bracket
195012 Clip(2)
TYPICAL WALL MOUNTING
TANK FEED INSTALLATION
INSTALLATION DRAWINGS:
Fig.4
Fig.5

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OPERATION:
SERVICE FLOW: Water drawn down stream from the injector will automatically cause the injec-
tor to “click” and inject the set amount of solution into the water line. The higher the ow rate the
more frequent the clicking, as the injector is designed to inject solution at the same set ratio regard-
less of water ow.
Water ow and pressure must be within the established specications. See the specication section
on page 10 for your model.
CHANGE FEED RATE: The feed rate on the injector is adjustable EVEN WHILE OPERATING
AND UNDER PRESSURE. Rotate the “Ratio Adjustment Sleeve” (#61) Important: for the 20%
model rotate the #7 Ratio Adjuster, to change the solution injection ratio. See g. 5,. The setting
indicator mark indicates the approximate ratio of injection setting. Check outlet water for chemical
to assure desired feed rate is being delivered.
NOTE: Do not rotate Ratio Adjuster below lowest setting line on decal. This can cause the injector
to lock.
BYPASS OPERATION: Injecting solution into the water line can be TEMPORARILY stopped
with the optional on/off feature. Moving the “On/off Lever” to the “OFF” position allows service
water to pass through the injector without injecting chemical. With the on/off lever set to the “ON”
position the injector will operate as normal and “clicking” will be heard when water is owing. It
is recommended to use the three valve bypass in Fig. 3, for continued bypassing or servicing of the
injector.
Run Position
Increase
On/Off Lever
Decrease
Setting Indicator
Mark
Fig.6 Example ratio sleeve

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MAINTENANCE:
RINSE INJECTOR AFTER EACH USE, additive allowed to remain in injector can dry out
and damage lower end at the next start up. Put suction tube into a 1 qt. (4 liters) or more con-
tainer of fresh ltered water. Pull fresh water through the injector by operating until container is
empty. This procedure is not needed for continuous operation.
BYPASS INJECTOR: When not in use put the injector in bypass mode by using the three valve
bypass (preferred) or the optional on/off lever on the injector.
CLEAN SUCTION TUBE FILTER SCREEN: Inspect each time new solution is added. Clean
as frequently as necessary by washing in fresh water. Remove lter screen (#27) from suction tube
(#25) and run water backwards through it. Replace if necessary. Keep lter screen off bottom of
solution container to prevent dirt and precipitate from contaminating solution.
STORAGE: For extended storage, rinse injector as described above and place entire injector
underwater (in 5 gal container). Monthly, apply a small amount (thimble full) of chlorine bleach to
avoid algae growth.
CLEAN SOLUTION CONTAINER: Keep covered to prevent any contaminants from entering
container. Rinse container thoroughly and often. Do not mix chemicals together that might react
and cause a precipitate. Use FILTERED WATER when lling container.
CLEAN INLET FILTER: Clean or replace inlet lter as required to increase the life of the unit
as well as reduce pressure loss.
REPLACE DOSAGE PISTON AND SHAFT SEAL: The injector is shipped with a spare Dos-
age Piston (44) and shaft seal (17), see Fig. 1, as these are normal wear parts, replace both when
solution injection is less than set amount.