User Manual - Metamix Proportional Pump
The Metamix Proportional Pump is powered by water flow, with minimal loss of pressure. The water engine powers the proportioning unit. No external power is required. The proportioning unit pumps liquid additives in direct relation to the amount of water that passes through the motor and injects the additives into the water system.
The water engine action:
The suction and proportioning unit is built from a piston connection to the water engine, from which it derives its movement. The piston moves within a cylinder with a non-return valve. The movement of the piston within the cylinder causes the water to be pumped and the required liquid additive to be drawn through a pipe inserted into a container. It is possible to regulate the supply ratio between the additive and the water passing through the pump in models: 2502, 2504, 2510, 12502, 12504, 12510.

• In models 2500, 2501, 2505, 12500, 12501, 12505 the dosing is predetermined and cannot be changed.

• In models 2512, 2514, 12512, 12514 the drawn additive is transferred through a bypass tube directly into the main water line, without contact with the water engine. • In models 2512IN, 2514IN, 12512IN, 12514IN the drawn additive is transferred through an inlet bypass directly into the main water line, without contact with the water engine.
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Trouble Shooting

Problem
Check
Solution
Pump does not operate
Check that the intake and outlet valves are open
Open the valve
Check that the water filter isn’t clogged
Clean the filter
Check that water is flowing in the line
Open main and outlet valve
Check that springs are not broken. Open pump lid & remove piston
Change the broken spring
Check that cylinder is not scratched
Change cylinder
Check that piston seals are not damaged
Change the seals
Pump does not draw
Dismantle the suction pump and check the suction seal for damage
Change the suction seal
Pump makes scratching noises Check if there is liquid in the additive container Add liquid to the container
Check if suction pipe is immersed and not folded Straighten or change the pipe
Check suction filter to see if it is blocked and if it is immersed in the additive tank Clean and rinse suction filter. Fill liquid into tank to cover filter.

Correct installation will prevent damages and malfunctions of the Pump.
It is strongly recommended to install a back flow preventor before the pump on the main water line. A vaccum release unit should be installed at the outlet of the Pump in order to prevent undesired suction of additive when the water line is draining.

A master valve must be installed before the pump, to be opened only for the operation of the pump to prevent water hammer damage to the pump. It is also recommended to install a filter before the pump. These should be installed according to local regulations.

Air-release Valve
In models 2500, 2501, 2502, 2504, 2505, 2510, 2512, 2514, 2512IN, 2514IN. After initial operation of the Pump, apply pressure to the cap (the air release valve) for several seconds to open valve that allows trapped air to escape. This air release is accompanied by a slight loss of water. Release the pressure on the cap to close the valve.
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Technical Data
The Metamix Pump operates in the following conditions:
• From a minimum flow rate of 20 L/H (5.3 Gal/H) and up to 2500 L/H (660 Gal/H)
• Temperature not lower than 4ºC (39ºF) and not higher than 40ºC (104ºF)
• Water pressure between 0.2 Bar to 6 Bar (2.9 to 85 PSI)

The additive may be added to the water flow according to the required dosing percentage:
0.2% to 2% in models: 2502,12502,2512,12512,2502P,2512IN,12512IN
0.4% to 4% in models: 2504,12504,2514,12514,2514IN,12514IN
3% to 10% in models: 2510,12510
Fixed dosage 0.2% in models: 2500, 12500
Fixed dosage 0.8% in models: 2501, 12501
Fixed dosage 5% in models: 2505, 12505


Water pressure loss:
Pressure loss in the lower flow rates 0.1 Bar and in the higher flow rates up to 1 Bar.
Models with 0.2%-2%: from 0.1 Bar up to 1 Bar in proportion to the water flow
Models with 0.4%-4%: from 0.2 Bar up to 1.2 Bar in proportion to the water flow
Models with 3%-10%: from 0.5 Bar up to 1.8 Bar in proportion to the water flow
The Metamix inlet and outlet are ¾” BSPT male thread
The additive tank should be placed beneath the Metamix pump.

Mounting the METAMIX Pump
1. Prepare the Pump site.
a. The pump intake and outlet must reach the intake and outlet pipes.
b. The pump must be positioned above the liquid additives container.
2. Screw the pump bracket onto a wall or any stable vertical base.
3. Press the pump onto the bracket. The nipples on the pump must click into the holes in the side of the bracket.
Installation of the Pump
Agriculture/horticulture/greenhouse installation
landscape/gardening installation


Installing the Pump on a Direct Line (in line)
1. Install onto the water line using swivel connectors and ensure that the water flows into the pump in the direction indicated by arrows printed on the pump.
2. Install a 50-75 mesh (250-300 micron) filter between the valve and the pump intake.
3. Valves have to be installed at the water line entry and exit; in order to stop the pump’s action – you should close the valve at the entry point.
4. Position the drawing pipe into the additive container. Ensure that the suction pipe filter is set several millimetres above the container’s bottom. Check to ensure that the suction pipe is not bent or folded.

view diagram

Installing the Pump on a Bypass line (off line)
Where water is supplied at a higher flow rate than the working flow rate of the pump or where the pump isn’t needed for continuous operation, the pump must be installed on a bypass line. The bypass provides the possibility to close the operation of the pump while water continues to flow through the line.
1. Install onto the water line using swivel connectors and ensure that the water flows into the pump in the direction indicated by arrows printed on the pump.
2. Install a 50-75 mesh (250-300 micron) filter between the valve and the pump intake.
3. Valves have to be installed at the bypass entry and exit and on the main water line.
4. Position the liquid additive container beneath the pump. Check to ensure that the suction pipe is not bent or folded. Position the drawing pipe into the additive container. Ensure that the suction pipe filter is set several millimetres above the container’s bottom.
view diagram

Adjusting the Pump
Every Stroke of the pump moves a predetermined volume of water with a predetermined volume of liquid additive. To adjust the volume of liquid additive in models 2502, 2504, 2512, 2514, 12502, 12504, 12512, 12514, 2512IN, 2514IN, 12512IN, 12514IN:

1. Remove the upper U-latch from the Proportioning Lock Nut.
2. Preset the amount of additives according to the Percentage to Water Scale that is found on the proportioner.
a. Turn the Proportioning Adjuster clock-wise to increase the amount of additives.
b. Turn the Proportioning Adjuster counter clock-wise to decrease the amount of additives.
3. The marking on the scale indicates the % of the additive out of the total water flowing through the pump.
4. Turn the Proportioning Adjuster slightly, until the U-latch holes of the Proportioning Lock Nut align with the notches in the proptortioner.
5. Push the U-latch into the U-latch holes of the Proportioning Lock Nut until it is firmly in place.

• In models 2510, 12510 there is no U-latch and the adjustment is done by turning the adjustment sleeve to the desired %.
• In models 2500, 2501, 2505, 12500, 12501, 12505 there is no possibility to adjust the dosing percentage, it is predetermined by the pump model.


* DO NOT REMOVE THE LOWER U-LATCH!!!
(For maintenance purpose only)

Rinsing and Cleaning the Pump
After pumping:
1. Rinse the unit by pumping clean water from the additives container.
2. Wash the external surface of the unit with clean water.
Warning: during pumping, ensure that the additive container is not completely empty.

Copyright © Metamix Inc. 2011. All rights reserved.

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