Table Des Matières; General Description; Applications; Type Key - Grundfos MQ Serie Notice D'installation Et D'entretien

CONTENTS
1. General description
1.1 Applications
1.2 Type key
1.3 MQ pump
2. Pumped liquids
3. Technical data
3.1 Operating conditions
3.2 Electrical data
3.3 Dimensions
3.4 Approvals
4. Functions
4.1 Control panel
4.2 Pump stop
5. Mounting and connection
5.1 Mounting the pump
6. Electrical connection
6.1 Generator or inverter
6.2 Wiring diagram
6.3 Winding resistance measurement
6.4 Start-up
7. Maintenance
7.1 Service kits
7.2 Start-up after a long time of inactivity
8. Service
9. Disposal
10. Fault finding chart
Dimensions
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The instal-
lation and operation should also be in
accordance with local regulations and ac-
cepted codes of good practice.
4

1. General description

Page The MQ is a compact water supply system consisting
of a pump, motor, pressure tank and controller com-
4
bined in an integral unit.
4
4 The pump starts automatically when water is con-
5 sumed in the installation and stops when the con-
sumption ceases. The MQ is a low-noise pump which
5
can be installed both indoors and outdoors.
5
Note: When installed outdoors the MQ should not be
5
exposed to direct sunlight or rain.
6
6 The pump is self-priming and has a check valve incor-
6 porated in the discharge port, see fig. 1. The pump
features a user-friendly control panel.
6
6 The pressure tank incorporated in the pump reduces
8 the number of starts and stops in case of leakage in
the installation.
8
8 The MQ pump has built-in overtemperature and dry-
running protection.
9
9

1.1 Applications

10
10
Typical applications:
11
• Water pressure boosting
11
(maximum inlet pressure: 45 psi) and
11
• water supply from wells (maximum suction lift:
11
25 ft), e.g.
11
- in private homes,
11
- in summer houses and weekend cottages,
12
- on farms,
35
- in market gardens and other large gardens.
The pump can be used for rain water and has been ap-
proved for drinking water.
The maximum suction lift of the pump can be deter-
mined from the diagram on page 35.
Example:
If the suction lift is 10 ft, the length of the suction
pipe must not exceed 72 ft.

1.2 Type key

Example
Pump type
Nominal flow rate [m³/h]
Head [m]
Code for pump version
A: Standard
Code for pipework connection
Code for materials
A: Standard
Code for shaft seal
MQ 3 -35 A -O -A BVBP