dosatron D8R User manual

D8R
8 m3/h 0.2% to 2% [40 GPM - 1:500 - 1:50]
OWNER’S MANUAL

You have just become the owner
of a DOSATRON proportional dosing pumps
and we congratulate you on your choice.
The development of this model is the result of over
25 years experience.
Our engineers have placed the DOSATRON series
at the forefront of technical development in the field
of non-electric proportional dosing pumps.
The choice of materials used in manufacture was most meticulous
in order to resist chemical attack from the great majority
of injectable products on the market.
This DOSATRON will, as time goes by,
prove itself to be a most faithful ally.
A little care and attention, regularly spent, will guarantee you
an operation in which the word breakdown has no place.
PLEASE, THEREFORE, READ THIS MANUAL CAREFULLY
BEFORE PUTTING THE DOSATRON INTO OPERATION.
Important !
The serial number of your DOSATRON is stamped on the bell housing.
Please record this number in the space below and refer to it when you call
your distributor for information, parts, and service.
Ref. # Serial # Purchase Date

DOSATRON 29
SUMMARY
CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTER 5
© DOSATRON INTERNATIONAL S.A. 2003 -
CLEANING THE WATER FILTER Page 18
HOW TO DRAIN THE DOSATRON Page 20
FITTING THE SUCTION TUBE Page 21
ADJUSTING THE INJECTION Page 22
INTERNATIONAL CONVERSIONS Page 23
CHANGING SEALS IN THE INJECTION
ASSEMBLY
Page 24
INSTALLATION PAGE 5
PUTTING THE DOSATRON INTO ORDER PAGE 11
PRECAUTIONS PAGE 15
MAINTENANCE PAGE 17
TROUBLESHOOTING PAGE 31

30 DOSATRON
SPECIFICATIONS
- Practical operating flow range : Min. 0.5 m3 /h [2.2 US GPM]
Max. 8 m3 /h [40 US GPM]
- Operating pressure : 0.15 bar to 8 bar [2.2 - 116 PSI]
- Concentrated additive injection : Min. 1 l/h [0.56 US fl. oz/min]
Max. 160 l/h [0.70 US GPM]
- Maximum operating temperature : 40° C [104° F]
- Externally adjustable injection ratio : 0.2% to 2% [1:500 - 1:50]
- Connections : Ø 40 [1"1/2] NPT/BSP
- Hydraulic motor capacity : About 1.7 l [0.45 US Gallons] for every 2 clicks of
the piston
- Self-priming : 4 meters
NOTE : THE DOSATRON IS NOT PRESET, see chapter ADJUSTING THE
INJECTION RATE
UNIT SIZE
Diameter : 18.4 cm [7 1/4"]
Total height of the DOSATRON : 58 cm [22 7/8"]
Width : 30 cm [11 4/5"]
Weight : 4 kg approx. [~ 8.8 US lbs]
SHIPPING CONTENTS
- 1 DOSATRON
- 1 mounting bracket for DOSATRON
- 1 suction tube of concentrated additive
- 1 by-pass tube Ø 6 x 9 [1/4" ID x 3/8" OD]
- 1 strainer
- 1 owner's manual
PACKAGE SIZE
60 x 36.5 x 24 cm [23 5/8" x 14 3/8" x 9 7/16"]
PACKAGE WEIGHT
5.5 kg approx. [~ 12.15 US lbs]

DOSATRON 31
Precise, simple and reliable
Installed directly in the wate
r
supply line, the DOSATRON
operates by using wate
r
pressure as the power source.
The water activates the
DOSATRON, which takes up
the required percentage o
f
concentrate. Inside the
DOSATRON, the concentrate is
mixed with the water. The wate
r
pressure forces the solution
downstream.
The dose of concentrate will
be directly proportional to the
volume of water entering the
DOSATRON, regardless o
f
variations in flow or pressure
which may occur in the main
line.
SOLUTION WATER + % ADDITIVE
CLEAR
WATER
CONCENTRATED
ADDITIVE TO BE
DOSED
MOTOR
PISTON
DOSING PISTON
ADJUSTMENT
(%) RATIO

32 DOSATRON
ACCESSORIES
MAINTENANCE
ADDITIONAL OPTIONS AVAILABLE
Call your authorised distributor or the manufacturer.

DOSATRON 33
CHAPTER 1
INSTALLATION
RECOMMENDATIONS
1 - GENERAL REMARKS
- When connecting a DOSATRON either to the public water supply or to its
own water source, you must respect the regulations in force concerning
protection of the source i.e. backflow prevention, etc.
- In a case where the water installation is higher than the DOSATRON itself,
there is a possible risk of water and concentrate flowing back through the
DOSATRON. In this case, installing a non-return valve downstream is
recommended.
- Do not install the DOSATRON just above an acid container, (risk of acid fumes
attacking the DOSATRON) and protect it, with a lid, from possible contact with
corrosive products.
- Do not install the DOSATRON on the suction side of the supply pump (risk of
siphoning).
- The DOSATRON should be protected from frost and from sources of excessive
heat.
2 - WATER WITH HIGH PARTICLE CONTENT
- It is imperative to set up a filter (300 mesh - 60 microns) upstream of the
DOSATRON.
3 - WATER-HAMMER / EXCESSIVE FLOW
- For installations subject to water hammer a protection device such as a check
valve or union ball check must be fitted (pressure/flow control system).
- For automatic installations, slow opening and closing solenoid valves are
preferable.
- In an installation where a DOSATRON serves several sectors, the closing of
one sector and the opening of another sector must be done at the same time
(simultaneous operation of the solenoid valves).

34 DOSATRON
ASSEMBLING THE DOSATRON
ASSEMBLY SHOULD BE CARRIED OUT WITHOUT THE USE OF TOOLS
The DOSATRON is delivered with :
- a mounting bracket,
- a suction tube with a strainer,
- a by-pass tube Ø 6 x 9 [1/4" ID x 3/8" OD].
The bracket enables the DOSATRON to be fixed to a wall.
- Slide dovetails on the pump body (Fig. 1-A) into the support bracket (Fig. 1-S).
- Remove the nuts (Fig. 1-E) and ferrules (Fig. 1-C) from the DOSATRON inlet
and outlet.
- Remove the plastic caps (Fig. 1-B) which block the inlet and outlet of your
DOSATRON before connecting to the water supply.
- Make sure the watertight seals at the inlet and outlet of the DOSATRON are
correctly positioned :
First position the <O> ring (Fig. 1-J) and then the spacing ring (Fig. 1-G).
Fig. 1
A
EC B G J
S
B

DOSATRON 35
For connecting to polyethylene or polypropylene pipe :
- Bevel the end of the pipe and slide on nut (Fig. 2-E) and then ferrule (Fig. 2-C).
- Slide pipes into water inlet and outlet (Fig. 2) as far as they will go.
- Push one ferrule (Fig. 2-C) against the inlet and the other against the outlet.
- Tighten the nuts (Fig. 2-E).
For connecting to PVC pipe :
- Proceed as for the polyethylene and polypropylene pipes but spread PVC
adhesive on the pipe where the ferrules are to be mounted.
- Then place the ferrules over the pipe using both thumbs in the slot to widen the
ferrule (Fig. 2-C) and avoid scraping off the adhesive, then tighten the nut.
NOTA :Wait for one hour before putting into operation.
The (nut and) ferrule made of polyacetal (Fig. 2-C) will not adhere to the
PVC glue and (they) can therefore be dismantled easily at a later date.
Fig. 2 C
E

36 DOSATRON
The connection of the DOSATRON to the water network can be done with
flexible hoses (internal diameter 40 mm) to be fixed by means of clamps and
turning adapters Ø 40 x 49 mm [1"1/2]. Make sure the water is flowing according
to the direction arrow on the pump body.
The DOSATRON is delivered with a suction tube (cut it to the needed length)
enabling its use with a large capacity concentrate container.
The tube must be fitted with its strainer and weight.
The instructions for fitting the tube are to be found in the specific chapter.
NOTE : The maximum suction height is 4 meters [13 feet].
Fit the tube, equipped with its strainer and its weight, and immerse it in the
solution to be injected.
IMPORTANT ! - The strainer must be suspended at least 10 cm [4"]
above the bottom of the stock solution container to
avoid sucking up the insoluble particles that may
damage the injector assembly (Fig.3).
- Do not put the strainer on the ground.
WHAT YOU SHOULD DO WHAT YOU MUST NOT DO
Under no circumstance should the
solution level be above the wate
r
inlet of the DOSATRON.
Fig. 3
Fig. 4
10 cm [4"]

DOSATRON 37
INSTALLATION HINTS
The DOSATRON can be connected to the main water line directly (Ex. 1) or on a
by-pass (Ex. 2), recommended.
If your flow rate is above the operating limits of the DOSATRON, see
EXCESSIVE FLOW.
EXCESSIVE FLOW (as an indication)
If your DOSATRON clicks more than 36 times, that is 18 cycles in 15 seconds,
you are close to the superior flow limit. If you need more flow, you must install a
DOSATRON with a higher flow capacity.
Ex. 1
Ex. 2
Non-return
valve
Filter
Valve
To prolong the working life of the
DOSATRON it is advisable to
install a filter (300 mesh - 60
microns) upstream.
This is imperative if the wate
r
contains impurities or particles,
especially if the water comes from
a well.
A filter is recommended and
required for the warranty to be
valid.
Installing the DOSATRON on a
bypass enables clean water to be
supplied without operating the
DOSATRON and the DOSATRON
to be easily dismantled.
When connecting an
installation to the public
water supply, you must
respect the rules and
regulations in force in the
country.
Filter
Valve

38 DOSATRON

DOSATRON 39
CHAPTER 2
PUTTING
THE DOSATRON
INTO ORDER
USING FOR THE FIRST TIME
- Place the by-pass lever in the ON position (Fig. 5-L).
- Open the water inlet valve slowly, the DOSATRON is self-priming.
- Operate the DOSATRON until the product to be dosed is drawn up into the
doser body (the product is visible through the plastic tube).
- The DOSATRON makes a characteristic “click-clack” noise when working.
NOTE :The time required to prime the suction tube depends on the water flow-
rate, the ratio setting and the length of the suction tube.
To (bleed the air from the suction tube and) accelerate the priming, set
the injection rate at maximum.
Once the DOSATRON is primed, adjust to the required injection rate
(see § ADJUSTING THE INJECTION RATE).
Fig. 5
L

40 DOSATRON
INCORPORATED HYDRAULIC BY-PASS
A mechanism to select either the dosing function or the by-pass mode :
The operating medium must have a minimum pressure of 0.8 bar [12 PSI] in
order to operate the by-pass.
- By-pass on OFF (Fig. 6-L), the DOSATRON is stopped and does not draw
up the product.
- By-pass on ON (Fig. 7-L), the DOSATRON works and the concentrate is
drawn up.
NOTE : When changing the lever (L) from the OFF to the ON position, it is
normal that a small jet of water escapes from the barbed fitting
Ø 3 [1/8"] (Fig. 7-Q).
To stop the injection of the product, when the pressure of your
mains is outside the limits of the correct by-pass operation
(0.8 to 8 bar) [12 PSI to 120 PSI], take out the suction pipe from
the solution tank.
Fig. 6 Fig. 7
LL
Q

DOSATRON 41
AUTOMATIC BY-PASS
A mechanism to select either the dosing function or the by-pass mode :
The operating medium must have a minimum pressure of 0.8 bar [12 PSI] in
order to operate the by-pass.
NOTE :When operating the By-pass through a remote control system, the
operating lever (Fig. 8-L) must be on the ON position.
Operating the automatic by-pass :
- Opening of the solenoid valve.
Power supply open : 1 to 2 > Normal operating :
Admission of the by-pass operating medium
By-pass function activated : Dosing function
stopped
3 > Outlet closed
Operating of the DOSATRON :
- Closing of the solenoid valve.
Power supply interrupted : 2 to 3 > Outlet open :
Escaping of the by-pass operating medium
Activating of the dosing function
1 > Pressure at stand-by
Fig. 8
L
3-way-
O : Solenoid valve
(not supplied with the
DOSATRON)
Q : Barbed fitting Ø 3 [1/8"]
(supplied with the DOSATRON)
T : Flexible tube Ø 6 x 9
[1/4" ID x 3/8" OD]
P
By-pass operating medium
(air or water)
Pressure : 0.8 to 8 bar
[12 PSI to 120 PSI]

42 DOSATRON
Automatic anti-siphon valve of product :
- This automatically recreates normal atmospheric pressure in the DOSATRON
in the event of an accidental vacuum in the line (Fig. 9).
Its use depends on the regulations in force in your country.
- You must comply with the local water authority's requirements.
- To put into operation, unscrew the nut (Fig. 9-E), remove the solid metal disc
(Fig. 9-P) and replace it by the washer (Fig. 9-C) supplied with the DOSATRON.
- Screw the nut (Fig. 9-E).
Fig. 9
E
C
Ball Rubber
washer
P

DOSATRON 43
CHAPTER 3
PRECAUTIONS
1 - IMPORTANT GENERAL INSTRUCTIONS
- During any intervention the operator must stay in front of the DOSATRON and
wear protective eyewear and gloves.
- It is the responsibility of the owner/operator to replace the injection seals
annually to ensure precise injection.
- It is the responsibility of the owner/operator to check that the flow and pressure
of the installation do not exceed these DOSATRON characteristics.
- It is the responsibility of the owner/operator of the DOSATRON, to determine
the correct amount of solution and injection ratio to obtain the desired result.
- An air inlet, an impurity or a chemical attack on a seal can interrupt the dosing
function. It is recommended to periodically check that the solution is being
correctly drawn up into the DOSATRON.
- Change the suction tube as soon as it seems damaged by the chemical.
- Protect the DOSATRON from freezing temperatures by draining it and store it
away from sources of excessive heat.
- Relieve the pressure after use (advised).
- Rinsing of the DOSATRON is required :
.when changing chemicals,
.before handling the DOSATRON, to avoid any contact with the chemical.
2 - INSTALLATION RECOMMENDATIONS
- All assembly should be done without tool, hand tighten only.
- A water filter (300 mesh - 60 microns) must be installed prior to the
DOSATRON (see accessories), if a filter is not installed abrasive substances will
cause the DOSATRON to deteriorate prematurely.
- In many areas backflow preventors are required, check with local authorities for
requirements of backflow devices. DOSATRON strongly recommends a
backflow preventor to prevent contamination of your water supply.

44 DOSATRON
3 - INSTALLATION LOCATION
- The location of the DOSATRON and concentrate container should be
accessible, but it should be away from the risk of hazardous chemicals
contaminating the solution in the container.
- It is recommended to label all water lines with a warning about the injected
solution i.e. Not For Human Consumption.
- In a case where the water installation is higher than the DOSATRON itself,
there is a possible risk of water and concentrate flowing back through the
DOSATRON. In this case, installing a non-return valve downstream the
DOSATRON is recommended.
- For installations subject to water hammer a protection device must be fitted
(pressure/flow control system).
- For automatic installations, slow opening and closing solenoid valves are
preferable.
- In an installation where a DOSATRON serves several sectors, the closing of
one sector and the opening of another sector must be done at the same time
(simultaneous operation of the solenoid valves).
- Do not install the DOSATRON just above an acid container, (risk of acid fumes
attacking the DOSATRON) and protect it, with a lid, from possible contact with
corrosive products.
- The DOSATRON should be protected from frost and from sources of excessive
heat.
- Do not install the DOSATRON on the suction side of the supply pump (risk of
siphoning).
4 - MAINTENANCE
- Rinse the injection parts after using the DOSATRON. To do this, insert suction
tube into container of clean water and inject about a 1/4 liter (1/15 U.S. gallon).
- Routine maintenance once a year will add to the life of your DOSATRON.
Replace the dosing seals as well as the suction tube annually to ensure proper
injection.
5 - SERVICE
- This DOSATRON was tested prior to packaging.
- Complete maintenance and seal kits are available.
- Call your distributor DOSATRON for service or parts.

DOSATRON 45
CHAPTER 4
MAINTENANCE
RECOMMENDATIONS
1 - When using soluble products for your solution, we recommend periodically
dismantling of the entire dosing part
(see : § CLEANING AND REFITTING THE SUCTION VALVE,
§ CHANGING SEALS IN THE INJECTION ASSEMBLY).
Thoroughly rinsing all the elements of the dosing part with water and re-
assembling them after having previously lubricated the seal (Fig. 10).
2 - An air inlet, an impurity or a seal's failure can interrupt the dosing function ;
periodically check out that the concentrate is correctly drawn up, thus
incorporated into the water.
3 - Before putting the DOSATRON into operation after a non-use period, remove
the motor piston and soak it into lukewarm water < 40° C overnight. This
helps to dissolve any deposits which may have dried onto the motor piston.
Fig. 10
Seal