Grundfos MQ 3-45 Service Instructions

28.04.2003
GB
16 / 24
4.10.1 Observation A
A1
TM02 2369 4201
Turn off the tap.
A2
TM02 2370 4201
The system is closed; the pressure must be minimum
2.5 bar.
If 2.5 bar is not reached, check the hydraulics.
If the pressure is above 2.5 bar, continue the fault finding
procedure.
A3
TM02 2371 4201
Wait approx. 15 seconds to see what happens when the
pump stops.
If the pump does not stop, even when the start/stop but-
ton is on, replace the controller.
If the pressure falls below 2.5 bar, check the non-return
valve in the suction line.
If the pressure does not fall, continue the fault finding
procedure.
A4
TM02 2372 4201
Disconnect the electricity supply by pulling out the plug.
A5
TM02 2373 4201
Remove the pressure switch plug from the controller.
Approx. 15 sec.
Non-return
valve

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