Product Overview

Product Details

Grundfos Hydro Multi S booster systems are designed for water pressure boosting in residential, institutional and commercial installations with multiple consumer outlets. All sets include a pair of Grundfos CM horizontal multistage 

end-suction pumps connected in parallel and frame mounted together with suction and discharge manifolds, valves, pressure gauge, pressure switches and a control unit providing motor protection. Also required is a diaphragm pressure tank that is supplied separately.

SYSTEM OPERATION

Systems are designed to give controlled pressure output at various demand levels and are operated by individual pressure switches that start and stop the pumps according to system pressure. The pumps are parallel connected to provide sequential operation, the #2 pump cutting in at higher demand levels. This gives the benefit of reduced energy consumption at lower demand levels, continuity of supply in the event of one pump fault and reduced capital cost. The 

control unit also offers the following features:- 

• Auto pump changeover each operating cycle

• Auto pump disconnection in the event of fault status 

• Dry run protection by pressure or level switch and auto resetting of dry run fault

• Current overload motor protection

• #2 pump start and stop delay.

 

 

 

Model

Voltage

(V)

Power

(kW)

Nominal

Flow

(m3 /kW)

Set

Pressure

(bar)

Tank

Size

(L)

Dimension (mm)

Weight

(kg)

L

W

H

A1

A2

CM3-4

1x240

2x0.5

7

2.5

33

590

615

815

330

480

68

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