Grundfos MQ 3-45 Service Instructions

28.04.2003
GB
24 / 24
24
5. Wiring diagram
5.1 Winding resistence measurement
The measurement can be done with or without cables connected to the PCB and the capacitor.
TM02 2424 4401
Motor
[V/Hz]
Reading point Winding
Resistance
[ Ω ±10%]
Ambiemt temperature
[°C] [°F]
230/50 A-B Main 6.4
21 70
230/60 A-C Aux 16.7
120/60
A-B Main 1.5
A-C Aux 6.1
Capacitor
Electrical motor
Ground
Phase
Neutral
Yellow-green
White
Black
Yellow-green
White (aux) Red (main) Blue
=> Mains
Orange Black Red
Black
=> Pressure switch
=> Flow sensor

Grundfos MQ 3-45 Specifications

General

Power consumption	1000 W
Maximum head	45 m
Maximum flow rate	3 m³/h
Protection class	IP54
Weight	13 kg
Maximum liquid temperature	35 °C
Maximum operating pressure	7.5 bar
Pumped liquid	Clean water
Liquid temperature range	0 - 35 °C
Maximum ambient temperature	45 °C
Supply voltage	220-240 V
Rated power - P2	0.75 kW
Mains frequency	50/60 Hz
Rated current	4.5 A
Enclosure class	IP54
Inlet connection	1 inch
Outlet connection	1 inch
Power supply	220-240 V, 50/60 Hz
Pump type	Centrifugal
Built-in pressure tank	Yes
Approvals	CE
Material	Stainless steel