4
CONTENTS
Page
1.
General description
4
1.1
Applications
4
1.2
Type key, DMM 4 to 390
5
1.3
Type key, DMM 440 to 990
6
2.
Technical data, DMM 4 to 390
7
2.1
Operating conditions
7
2.2
Electrical motor data
7
2.3
Dimensions
7
2.4
Performance curves
7
3.
Technical data, DMM 440 to 990
8
3.1
Operating conditions
8
3.2
Electrical motor data
8
3.3
Dimensions
8
3.4
Performance curves
8
4.
Installation
9
4.1
Safety instructions
9
4.2
Precautions
9
4.3
Installation of pump
9
4.4
Installation example
10
4.5
Installation components
11
4.6
Electrical connection
12
5.
Stroke length setting
12
6.
Start-up
12
7.
Maintenance
12
7.1
Service kits
12
7.2
Replacement of diaphragm
12
8.
Service
12
9.
Fault finding chart
13
10.
Disposal
13
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The in-
stallation and operation should also be in
accordance with local regulations and ac-
cepted codes of good practice.
1. General description
The GRUNDFOS DMM dosing pump is a self-prim-
ing diaphragm pump, consisting of a dosing head
with diaphragm, a gear, and a motor.
1.1 Applications
The DMM dosing pump is designed for handling
chemicals within the following ranges of applications:
• Drinking water treatment.
• Waste water treatment.
• Swimming baths and pool water treatment.
• Industrial water treatment.
• Water treatment in district heating plants.
• Water treatment at farms and market gardens.
