Every care has been taken to ensure the accuracy of the information contained in this publication, but due to continuous development and improvement the right is reserved to supply products
which may differ slightly from those illustrated and described in this publication.
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OPTIONAL EXTRAS
The installation of a small 3L pressure tank after the pump and PRESSCONTROL in the system is recommended. This reduces
water hammer and pump start and stop cycle, increasing the operating life for your ECO-MXA and reducing start up wear.
By decreasing the pump’s start/stop cycling with a 3L expansion tank, this then helps to decrease the total power consumption
significantly.
The pressure tank should be precharged at a slightly lower value than the restart pressure calibration value of the PRESSCONTROL
device. The PRESSCONTROL is calibrated at 1.5 bar (22PSI), precharge the pressure tank at approximately 1.2 bar (18PSI).
Water hammer is a pressure surge or wave caused when a fluid in motion is forced to stop or change direction suddenly. Water
hammer commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in
the pipe. This pressure wave can cause major problems, from noise and vibration to pump failure, with the installation of the
pressure tank, the effects of the water hammer pulses can be removed.
For systems with minimal delivery demands, e.g. a glass of water, ice-making refrigerator, filter system, UV system
inverse, osmosis systems or old systems with small losses a 3L pressure tank is mandatory.
3L tank mounted horizontally
3L tank mounted vertically
3L PRESSURE TANK
3L Pressure Tank
System with Ceramic taps, solenoid mixing valve (these are fitted in washing machines & dish washers etc) or copper
pipes must have a 3L pressure tank installed to absorb water hammer!
Valve closed - water is still
Valve open - water is moving
through the valve
ECO-MXA 404
ECO-MXA 404 with 3L
pressure tank installed
768kWh
per year
Up to
15%
reduction
Valve closes - water hammer
pressure wave produced
3L pressure tank installed -
spikes produced by valve
closure absorbed
WATER HAMMER
653kWh
per year
*Based on a family of four
Drawing 5.0
Drawing 5.1
3L PRESSURE TANK INSTALLATION
