Product Description; Operating Conditions; Materials In Contact With The Liquid - Lowara AQUONTROLLER MM series Installations- Und Bedienungsanleitungen

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2.1 Product description

AQUONTROLLER is a variable frequency speed controller (inverter) for constant pressure systems.
In a plumbing system, the demand for maximum flow is sporadic as water is generally used at
irregular intervals and variable demands are therefore the norm.
For these reasons, AQUONTROLLER automatically regulates the speed of the electric pump in order
to maintain the water pressure in the system constant.
AQUONTROLLER is available in the following versions:
MMW: inverter connected to the water supply line with a single-phase power supply for a
•
single-phase pump. It can be installed in any position, although it should be installed
vertically.
MMA: air-cooled inverter, wall mounted vertical position, with a single-phase power supply
•
for a single-phase pump.
2.2 Advantages and benefits
The main purpose of the appliance is to maintain constant pressure in a plumbing system as this
provides the following advantages and benefits:
Energy saving
Constant pressure at variable flow rates
Increased pump lifetime
Automatic reset for various faults, ensuring continuity of supply.
It also simplifies the design and installation of the system via:
Quick and easy hydraulic and electrical installation
Built-in check valve
Avoids need of: pressure switch, large expansion tanks.

2.3 Operating conditions

Environment MMW
MMA
Liquid MMW
MMA

2.3.1 Materials in contact with the liquid

MMW Inverter:
body: PP about 40%;
-
non returne valve: POM;
-
flow sensor: ferrite;
-
o-ring sealing: NBR;
-
heatsink: brass.
-
MMA Pressure sensor:
Stainless steel AISI 316 L
34
Ambient temperature range: 0..+40° C.
Maximum relative humidity: 50% at +40° C (without condensation).
Liquid temperature range: +1..+40° C.
Water with no chemically aggressive substances (ph 5÷9) or suspended
solids.
Hardness: max 54° f. Harder waters can cause severe damage to the
non-return valve integrated.
NOT capable of running on most water with glycol.
Liquid temperature range:
0..+50° C, max accuracy of sensor ±1.0%FS.
-10..+80° C, max accuracy of sensor ±1.5%FS.