Grundfos CH Series, CHN Series, CH 2, CHN 2, CH 4 Installation And Operating Instructions Manual

GRUNDFOS INSTRUCTIONS

CH, CHN

Installation and operating instructions

CH, CHN

Installation and operating instructions 6
Montage- und Betriebsanleitung 10
Notice d’installation et d’entretien 15
Istruzioni di installazione e funzionamento 19
Instrucciones de instalación y funcionamiento 23
Instruções de instalação e funcionamento 27
Οδηγίες εγκατάστασης και λειτουργίας 31
Installatie- en bedieningsinstructies 35
Monterings- och driftsinstruktion 39
Asennus- ja käyttöohjeet 43
Monterings- og driftsinstruktion 47
Instrukcja montażu i eksploatacji 51
Руководство по монтажу и эксплуатации 57
Szerelési és üzemeltetési utasítás 63
Navodilo za montažo in obratovanje 68
Montažne i pogonske upute 73
Uputstvo za montažu i upotrebu 78
Instrucţiuni de instalare şi utilizare 83
Упътване за монтаж и експлоатация 87
Montážní a provozní návod 92
Návod na montáž a prevádzku 97

FIN

5

CONTENTS

Page

1. General description 6

1.1 Applications 6

1.2 Operating conditions 6

1.3 Technical data 6

1.4 Sound pressure level 6

2. Installation 7

2.1 Pump location 7

2.2 Position of terminal box 7

2.3 Pipework 7

2.4 Installation examples 7

3. Electrical connections 8

3.1 Checking of direction of rotation 8

4. Starting 8

4.1 Priming 8

4.2 Frequency of starts and stops 8

5. Operation and maintenance 8

5.1 Frost protection 8

6. Fault finding chart 9

7. Disposal 9

Before beginning installation procedures,
these installation and operating instruc­tions should be studied carefully. The in­stallation and operation should also be in
accordance with local regulations and ac­cepted codes of good practice.

1. General description

1.1 Applications

The CH/CHN range of Grundfos horizontal multi­stage centrifugal pumps are designed for the pump­ing of water and other thin, non-aggressive and non­explosive liquids, not containing solid particles or fi­bres.

1.2 Operating conditions

1.2.1 Liquid temperature

0°C to +90°C.

1.2.2 Ambient temperature

Up to +55°C.

1.2.3 Maximum operating pressure

0°C to +40°C: Up to 10 bar.
+41°C to +90°C: Up to 6 bar.

1.2.4 Maximum inlet pressure

The actual inlet pressure plus the pressure when the
pump is operating against a closed valve should al­ways be lower than the “maximum operating pres­sure”.

1.2.5 Minimum inlet pressure

The table below applies to the maximum flow rates
of the pumps and a barometric pressure of
760 mmHg.

The values stated are the minimum inlet pressures/
maximum suction lifts “H” [m head] at the pump suc­tion port. The values are stated at different liquid
temperatures. The head loss in the suction pipe

should therefore be taken into account.

The maximum suction lift may be limited by the ac­tual head.

Type H [m head]
50 Hz 20°C 40°C 55°C 90°C

CH 2 *4.1 *3.6 *2.7 2.8
CHN 2 *4.1 *3.6 *2.7 2.8
CH 4 *7.5 *7.0 *6.1 *0.6
CHN 4 *7.5 *7.0 *6.1 *0.6
CH 8 *6.3 *5.8 *4.9 0.6
CH 12 *5.6 *5.1 *4.2 1.3

60 Hz

CH 2 *3.1 *2.6 *1.7 3.8
CHN 2 *3.1 *2.6 *1.7 3.8
CH 4 *6.8 *6.3 *5.4 0.1
CHN 4 *6.8 *6.3 *5.4 0.1
CH 8 *6.9 *6.4 *5.5 0.0
CH 12 *3.5 *3.0 *2.1 3.4

“H” = minimum inlet pressure during operation.
“H” marked * = maximum suction lift during opera-

tion.
1 m head ≈ 0.1 bar.

1.3 Technical data

1.3.1 Electrical data

See the pump nameplate.

1.3.2 Dimensions

See page 103.

1.4 Sound pressure level

The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
98/37/EC relating to machinery.

6

2. Installation

2.1 Pump location

The pump should be installed so that the suction
pipe is as short and the suction lift as small as possi­ble.

The pump should be sited in a well ventilated but
frost-free position, see section 5.1 Frost protection.
It may be sited outside, but it should be protected
from the elements by means of a suitable cover.

The pump may be installed in one of the positions
shown in fig. 1.

Fig. 1

2.2 Position of terminal box

The terminal box can be turned to any one of the po­sitions shown in fig. 2 before the pump is installed.

Fig. 2

To change the position of the terminal box:

1. Remove the four screws which, from the motor
side, are screwed into the discharge chamber.

2. Turn the stator housing to the required position.

3. Replace the screws and tighten securely.

2.3 Pipework

The pipes should be fitted so that any tension
caused by variations in temperature does not affect
the pump.

2.3.1 Suction pipe

If the pump is to draw liquid from a level lower than
the pump suction port, a foot/non-return valve must
be fitted to the end of the suction pipe, below the
lowest liquid level, since the pump is not self-prim­ing.

The suction pipe is connected to the pump suction
port S, fig. 3.

Fig. 3

T

S

When the suction pipe is longer than 10 metres or
the suction lift is greater than 4 metres, the diameter
of the suction pipe must be larger than that of the
pump suction port.

Every joint of the suction pipe must be completely
tight.

If a hose is used as suction pipe, it must be non-col­lapsible. A strainer is recommended in cases where
solids could enter the suction pipe and block the

TM00 0689 4896 TM00 0690 5192

pump.

2.3.2 Discharge pipe

The discharge pipe is connected to the discharge
port T, fig. 3.

The discharge pipe should be at least the same di­ameter as the discharge port of the pump, to mini­mize pressure drop, high flow velocities and noise.

2.3.3 Bypass

If there is any danger of the pump running against a
closed discharge valve, a minimum liquid flow
through the pump should be ensured by connecting
a bypass/a drain to the discharge pipe. The drain
can for instance be connected to a tank.

A minimum flow rate equal to 10% of the flow rate at
maximum efficiency is needed at all times. Flow rate
and head at maximum efficiency are stated on the
pump nameplate.

2.4 Installation examples

The pump is suitable for a wide range of applica­tions.

Some examples are shown on page 102.

TM00 0691 4896

7