background image

7

5.2 Inlet pressure

Minimum inlet pressure

Fig. 1

Schematic view of open system with a CRNE-HS 
pump

The maximum suction lift "H" in metres head can be calculated as 
follows: 

H = p

b

 x 10.2 – NPSH – H

f

 – H

v

 – H

s

p

b

= Barometric pressure in bar. 

(Barometric pressure can be set to 1 bar.) 
In closed systems, p

b

 indicates the system pressure in 

bar. 

NPSH  = Net Positive Suction Head in metres head (to be read 

from the NPSH curve on page 23 at the highest flow the 
pump will be delivering). 

H

f

 

= Friction loss in suction pipe in metres head at the 

highest flow the pump will be delivering. 

H

v

= Vapour pressure in metres head, see Fig. B on page 23. 

t

m

 = Liquid temperature. 

H

s

 

= Safety margin = minimum 0.5 metres head. 

If the calculated "H" is positive, the pump can operate at a suction 
lift of maximum "H" metres head. 

If the calculated "H" is negative, an inlet pressure of minimum "H" 
metres head is required. There must be a pressure equal to the 
calculated "H" during operation. 

Example

p

b

 = 1 bar.

Pump type: CRNE 1 HS.
Flow rate: 2 m

3

/h.

NPSH (from page 23): 2.0 metres head. 
H

f

 = 3.0 metres head. 

Liquid temperature: +60 °C.
H

v

 (froFig. B, page 23): 2.1 metres head. 

H = p

b

 x 10.2 – NPSH – H

f

 – H

v

 – H

s

 [metres head]. 

H = 1 x 10.2 – 2.0 – 3.0 – 2.1 – 0.5 = 2.6 metres head.

This means that the pump can operate at a suction lift of 
maximum 2.6 metres head.

Pressure calculated in bar:  2.6 x 0.0981 = 0.255 bar. 
Pressure calculated in kPa: 2.6 x 9.81 = 25.5 kPa.

Maximum inlet pressure 

10 bar (static pressure).

25 bar (pressure during operation).

Maximum operating pressure

50 bar.

5.2.1 Pressure test

The pump may be tested at a static pressure of 55 bar. 

To lock the pump shaft, proceed as follows:

1. Remove the motor. 

2. Lift the chamber stack as far as possible and fit a bracket 

(fig. 2) to the pump shaft and the pump head. 
The bracket must be ordered separately (product number 
96465853).

Fig. 2

Bracket for locking the pump shaft

5.3 Minimum flow rate

5.4 Shaft seal

The shaft seal is fitted on the suction side of the pump. As the 
shaft seal is not affected by the discharge pressure, the choice of 
shaft seal is only determined by the inlet pressure as well as the 
chemical properties and temperature of the liquid to be pumped.

5.5 Start/stop of pump 

The number of starts and stops via the mains supply must not 
exceed 4 times per hour. When switched on via the mains supply, 
the pump will start within 5 seconds.

If a higher number of starts and stops is desired, the input for 
external start/stop must be used when starting/stopping the 
pump.
When started/stopped via an external on/off switch, the pump will 
start immediately.

The maximum number of starts and stops is 200 times per hour.

6. Installation

See the installation and operating instructions for the CR, CRI, 
CRN pumps.

In order to maintain the UL/cUL approval, additional installation 
procedures must be followed. See page 22.

6.1 Motor cooling

To ensure cooling of motor and electronics, the following must be 
observed: 

Place the pump in such a way that sufficient cooling is 
ensured. 

Keep the temperature of the cooling air below 40 °C. 

Keep motor cooling fins and fan blades clean.

T

M

0

2

 01

18

 38

00

Caution

The actual inlet pr the maximum pump 
pressure (at no flow) must not exceed 50 bar.

Caution

The pump must not run against a closed 
discharge valve.

Hv

H

NPSH

Pb

Hf

Note

During the test, the pump shaft must be locked to 
prevent axial movement.

TM

0

3

 0

504

 0

1

05

Pump type

Liquid temperature

Up to +80 °C

+80 to +90 °C

CRNE 1 HS

0.5 m

3

/h

1.0 m

3

/h

CRNE 3 HS

0.5 m

3

/h

1.0 m

3

/h

Caution

Do not use rapid-closing valves, e.g. rapid-
closing spray guns, as these may cause water 
hammering.

Содержание CRNE 1 HS

Страница 1: ...CRNE HS GRUNDFOS INSTRUCTIONS Installation and operating instructions ...

Страница 2: ...2 Start up 1 TM03 0489 5204 2 TM03 0490 5204 3 TM03 0491 5204 4 TM03 0492 5204 5 TM03 0493 5204 6 TM03 0494 5204 7 TM03 0495 5204 8 TM03 0496 5204 OFF ON ON OFF 1 2 OFF ON ...

Страница 3: ...mpe ausschalten Hinweis Die Drehrichtung ist werkseitig eingestellt und lässt sich nicht ändern 5 Kupplungsschutzschirm wieder montieren 6 Pumpe einschalten und über das Entlüftungsventil im Kopfstück entlüften Gleichzeitig das druckseitige Absperrventil ein wenig öffnen 7 Die Entlüftungsvorgehensweise fortsetzen Gleichzeitig das druckseitige Absperrventil ein bisschen mehr öffnen 8 Entlüftungsven...

Страница 4: ...не соединен с приводом Остановите насос Примечание Направление вращение устанавливается изготовителем при сборке и не может быть изменено 5 Установите соединительную защитную пластинку на свое место 6 Запустите и продуйте насос при помощи выпускного клапана который находится на уровне напора насоса Одновременно слегка приоткройте запорный клапан со стороны выпуска 7 Продолжайте вентиляцию насоса О...

Страница 5: ...5 CRNE HS Installation and operating instructions 6 Montage und Betriebsanleitung 10 Monterings og driftsinstruktion 14 Руководство по монтажу и эксплуатации 18 ...

Страница 6: ...peed and sound pressure level The pump is typically used as a pressure booster pump in systems with variable demands On delivery the pump is ready for installation and start up The pump will start up at 100 performance 5 Operating conditions 5 1 Temperature ranges Ambient temperature 20 C to 40 C Liquid temperature 20 C to 120 C HQQV shaft seal 20 C to 90 C Temperature during storage transport 40 ...

Страница 7: ...d fit a bracket fig 2 to the pump shaft and the pump head The bracket must be ordered separately product number 96465853 Fig 2 Bracket for locking the pump shaft 5 3 Minimum flow rate 5 4 Shaft seal The shaft seal is fitted on the suction side of the pump As the shaft seal is not affected by the discharge pressure the choice of shaft seal is only determined by the inlet pressure as well as the che...

Страница 8: ...HIE and CME pumps 11 Maintenance The pump bearings the shaft seal and the motor bearings are maintenance free If the pump is to be drained for a long period of inactivity remove one of the coupling guards to inject a few drops of silicone oil on the shaft between the pump head and the coupling This will prevent the shaft seal faces from sticking 12 Megging 13 Coupling adjustment For adjustment of ...

Страница 9: ...ons See Fig C and page 24 Weights See label on the packing 14 6 Maximum speed and sound pressure level The sound pressure level is calculated according to ISO 9871 and ISO DIS 11203 method Q2 15 Disposal This product or parts of it must be disposed of in an environmentally sound way 1 Use the public or private waste collection service 2 If this is not possible contact the nearest Grundfos company ...

Страница 10: ...0 V and or when protected by a circuit breaker having an interrupting rat ing not less than see table below RMS symmetrical amperes 480 V maximum USA hp Europe kW 1 1 5 Overload protection Degree of overload protection provided internally by the drive in percent of full load current 102 1 2 Before starting the pump The pump must always be connected to the power supply at least one hour prior to st...

Страница 11: ...0 80 100 p kPa CRNE 1 23 HS 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Q m h 0 2 4 6 8 H m 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 Q l s 0 20 40 60 80 p kPa CRNE 3 23 HS TM02 7445 3503 20 15 12 10 8 0 6 0 5 0 4 0 3 0 2 0 1 0 0 8 0 6 0 4 0 3 0 2 0 1 1 5 120 110 90 100 80 70 60 50 40 30 20 10 0 Hv m tm C 150 130 140 25 35 45 40 30 160 170 180 190 62 79 100 126 ...

Страница 12: ...1 D2 PJE CX PJE B1 B1 B2 B1 B1 B2 CRNE 1 23 HS 4 6 680 1052 715 1087 220 188 62 69 CRNE 1 23 HS 6 0 680 1071 715 1106 220 188 66 73 CRNE 1 23 HS 7 5 680 1071 715 1106 260 213 71 78 CRNE 3 23 HS 4 6 680 1052 715 1087 220 188 62 69 CRNE 3 23 HS 6 0 680 1071 715 1106 220 188 62 69 CRNE 3 23 HS 7 5 680 1071 715 1106 260 213 71 78 ...

Страница 13: ...25 CRNE 1 and 3 HS Fig D 1 TM03 0497 5204 2 TM03 0498 5204 3 TM03 0499 5204 4 TM03 0500 5204 0 5x x M6 13 Nm M8 31 Nm M10 62 Nm M5 2 5 Nm ...

Страница 14: ...26 ...

Страница 15: ... 1391 Telefax 81 35 448 9619 Korea GRUNDFOS Pumps Korea Ltd 6th Floor Aju Building 679 5 Yeoksam dong Kangnam ku 135 916 Seoul Korea Phone 82 2 5317 600 Telefax 82 2 5633 725 Latvia SIA GRUNDFOS Pumps Latvia Deglava biznesa centrs Augusta Deglava ielā 60 LV 1035 Rīga Tālr 371 714 9640 7 149 641 Fakss 371 914 9646 Lithuania GRUNDFOS Pumps UAB Smolensko g 6 LT 03201 Vilnius Tel 370 52 395 430 Fax 37...

Страница 16: ...ad makes it possible Innovation is the essence The name Grundfos the Grundfos logo and the payoff Be Think Innovate are registrated trademarks owned by Grundfos Management A S or Grundfos A S Denmark All rights reserved worldwide 96477321 0110 184 Repl 96477321 0205 ...

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