background image

7

5.3 Alarm resetting

There are two possible resetting modes which can be selected by 
means of each of the switches SL and SP.

SL:

Dry running.

SP: High pressure.

Fig.

7

M (Manual). When acceptable conditions have been restored, 
the pumps are started by pressing the reset button on the front 
cover.

A (Automatic). When the pressure/level has reached an ac-
ceptable value, the pumps start automatically.

5.4 Pressure setting

The pumps are cut in and out according to the pressures set on 
the pressure switches.

A common differential (

ƒ) 

pressure (cut-out pressure – cut-in 

pressure = 

ƒ

 pressure) must be set on the pressure switches. 

The cut-out pressures differ 0.3 to 0.5 bar respectively (cascade 
step).

Example:

3 pumps.

ƒ

 pressure

 = 1.5 bar.

Cascade step  = 0.3 bar.

Pr 1, 2, 3

 = Pressure switch 1, 2, 3.

P 1, 2, 3

 = Pump 1, 2, 3.

Fig.

8

The settings of the pressure switches Pr 2 and Pr 3 are in a de-
creasing sequence as shown in the table and fig. 8.

When water is consumed, this is first tapped from the diaphragm 
tank. Then the pressure drops to the first cut-in pressure, and the 
first pump is cut in. If the consumption is still rising, more pumps 
will be cut in until the performance of the pumps in operation cor-
responds to the requirements.

When the water consumption falls, the discharge pressure rises 
to the cut-out pressure and the CS 1000 cuts out one pump. If the 
consumption is still falling, more pumps will be cut out.

Note:

 Each pressure switch is related to one pump only and not 

necessarily to the same pump when pump alternation is selected 
on the DIP switch, see section 

5.2 Operation selection

.

Pressure switch Pr 1 must be set to the highest cut-in and cut-out 
values.

5.5 Pressure switch

On each pressure switch, the following settings must be made:

Cut-out pressure.

ƒ

 pressure (differential pressure).

Note:

 The cut-in pressure is set as the cut-out pressure minus 

ƒ

 pressure.

Fig.

9

1. Cut-out pressure:

+ to increase.
– to decrease.

2.

ƒ

 pressure (differential pressure):

+ to increase.
– to decrease.

5.6 Tank precharge pressure

The precharge pressure is equal to the minimum cut-in pressure.

TM

00 97

44 039

7

Pressure switch 

and 

pump numbers

Cut-in 

pressure 

[bar]

Cut-out 

pressure 

[bar]

ƒ

 pressure

[bar]

Pr 1 / P 1

2.6

4.1

1.5

Pr 2 / P 2

2.3

3.8

1.5

Pr 3 / P 3

2.0

3.5

1.5

TM

00

 97

32

 02

97

SL

SP

Pr 1
Pr 2
Pr 3

Pr 1
Pr 2
Pr 3

Cu

t-

ou

t

Cut-

in

ƒ

 pressure

Cascade
step

One pump 
in operation

Two pumps
in operation

Three pumps 
in operation

T

M

00

 97

40

 03

97

1

2

Содержание Hydro 1000

Страница 1: ...Hydro 1000 Installation and operating instructions GRUNDFOS INSTRUCTIONS...

Страница 2: ...tives on the approximation of the laws of the EC Member States relating to Machinery 98 37 EC Standard used EN ISO 12100 Electromagnetic compatibility 89 336 EEC Standards used EN 61 000 6 2 and EN 61...

Страница 3: ...rks blocks of flats hotels industry hospitals schools etc 1 2 Operating conditions Liquid temperature Maximum 50 C Ambient temperature 0 C to 40 C Operating pressure Maximum 10 bar Minimum and maximum...

Страница 4: ...s connected Dry running alarm The red indicator light is on when the dry running alarm is activated The light goes out when the alarm is reset If automatic resetting is chosen the indica tor light goe...

Страница 5: ...en the inlet pressure level drops below the set value the pumps are cut out When the correct pressure level value is restored the pumps can be reset to operation auto matically or manually 4 5 Priming...

Страница 6: ...6 Note A pilot pump is the pump that starts first stops last is generally smaller than the other pumps smaller flow higher head is not to be alternated must be installed in position P1 Before changin...

Страница 7: ...more pumps will be cut in until the performance of the pumps in operation cor responds to the requirements When the water consumption falls the discharge pressure rises to the cut out pressure and th...

Страница 8: ...8 Pump 1 will now start 9 Check the direction of rotation of the pump In case of incor rect rotation interchange two phases of the electricity supply 10 Vent the pump while slowly opening its discharg...

Страница 9: ...e pressure Check the diaphragm tank precharge pressure 3 Frequent starts and stops a Incorrect setting of time delay TR 2 Set the time delay TR 2 accordingly b Incorrect setting of pressure switch Inc...

Страница 10: ...a Supply Voltage 3 x 400 V 6 10 50 Hz PE Pos Description Number 1 Suction manifold 1 2 Discharge manifold 1 3 Base frame 1 4 Stand 1 5 Control box 1 6 CR pump 2 4 7 Non return valve 1 per pump 8 Isola...

Страница 11: ...Sasso 4 I 20060 Truccazzano Milano Tel 39 02 95838112 Telefax 39 02 95309290 95838461 Japan GRUNDFOS Pumps K K 1 2 3 Shin Miyakoda Hamamatsu City Shizuoka pref 431 21 Phone 81 53 428 4760 Telefax 81...

Страница 12: ...www grundfos com Being responsible is our foundation Thinking ahead makes it possible Innovation is the essence 96413144 0405 GB Repl 96413144 0902...

Отзывы: