Product Description; Mechanical Installation - Grundfos CR deep-well Montage- Und Betriebsanleitung

CONTENTS
1.

Product description

2. Type key
3.

Mechanical installation

3.1 Installation of pump
3.2 Ejector connection
3.2.1 Ejectors with iron pipe connection
3.2.2 Ejectors with plastic tube connection
3.3 Fitting the discharge pipe
3.4 Installing the pressure tank and pressure switch
3.4.1 Precharge pressure of pressure tank
3.4.2 Cut-in pressure
4. Electrical connection
5. Start-up
6. Maintenance
7. Frost protection
8. Fault finding
8.1 Fault finding of pump
8.2 Fault finding of pump system
8.2.1 Cleaning a clogged ejector
9. Disposal
Prior to installation, read these installation and oper-
ating instructions. Installation and operation must
comply with local regulations and accepted codes of
good practice.
1. Product description
The pump system consists of a dry-installed CR(I) multistage
centrifugal pump connected to a submerged ejector via two
pipes. It is advisable to connect a pressure tank and a pressure
switch to the discharge side of the pump to maintain a suitable
pressure at the tapping point.
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Fig. 1 Connections of CR deep-well pump
Pos. Description
1 Connection to the priming pipe of the ejector
2 Connection to pressure tank (partly hidden)
3 Priming container connection to riser pipe
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2. Type key
Example CRI
Type range CR, CRI
Nominal flow rate in m³/h
Number of impellers
Code for pump version
DW: CR, CRI pump with ejector
Code for pipe connection
A: Oval flange
CA: FlexiClamp
F: DIN flange
P: PJE coupling
Code for materials
A: Basic version
I: Wetted parts 1.4301/AISI 304
Code for rubber parts of pump
E: EPDM
V: FKM
Code for shaft seal
H: Balanced cartridge seal
Code for seal faces
B: Carbon
Q: Silicon carbide
Code for rubber parts of shaft seal
E: EPDM
V: FKM
See also the installation and operating instructions of CR, CRI,
CRN.
3. Mechanical installation
Installation and operation must comply with local
regulations and accepted codes of good practice.
Before installation, check that
• the pump and its components correspond to the order.
• no visible parts have been damaged.
It is advisable to install the pump system as shown below.
Water level
Riser pipe 1¼"
Ejector
Boring tube
Fig. 2 Pump system with deep-well pump
3.1 Installation of pump
The pump must be installed as described in the installation and
operating instructions of CR, CRI, CRN.
5 -13 -DW -F -I -E -H QQ E
Pressure
switch
Priming pipe 1"