Grundfos Magna 32-120, Magna 50-120, Magna 65-60, Magna 40-120, Magna 65-120 Service Instructions Manual
...
Service instructions
MAGNA Series 2000
Magna 32-120, 40-120, 50-60, 50-120, 65-60, 65-120
50/60 Hz
1~
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96558929 0804
GB
1. Type identification .......................................................................................................................2
1.1 Nameplate...................................................................................................................................................... 2
1.2 Type key ..........................................................................................................................................................2
2. Dismantling and assembly ..........................................................................................................3
2.1 Dismantling the pump................................................................................................................................4
3. Fault correction............................................................................................................................. 5
3.1 Fault finding...................................................................................................................................................5
3.2 Fault correction procedure.........................................................................................................................8
3.3 Fault indications via R100 fault log .......................................................................................................14
4. Winding resistance..................................................................................................................... 15
The pump must be serviced by a qualified person.
Service must be carried out in accordance with local regulations and accepted codes of good practice.
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1. Type identification
1.1 Nameplate
1.2 Type key
TM02 8834 0904
Pos. Description Pos. Description
1 Type designation 8 Production code (year + week)
2 Product number 9 Country of origin
3 Model designation 10 Direction of rotation
4 Rated voltage and number of phases 11 Rated frequency
5 Maximum full-load current 12 Liquid temperature limit
6 Maximum input power 13 Enclosure class
7 Mark of conformity 14 Insulation class
Example MAGNA (D) 32 -120 F (N) Model: E
Type rang e
Twi n-head p ump
Nominal flange diameter [mm]
Maximum head [dm]
Pump housing with flanges
Pump housing of stainless steel
32-120F
P/N: 96513625
I
1/1
(A)
P
1
(W)
0.15
1.55
345
22
PC: 0116
Model : E
1 230-240 V
50/60 Hz
IP 44
TF 110
MIN
MAX
MIN
MAX
Class F
MAGNA
1
2
3
4
5
6
14
13
12
11
10
9
8
7
Made in Germany
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2. Dismantling and assembly
Before dismantling
• Disconnect the electricity supply to the motor.
• Close the isolating valves, if fitted, or drain the system, as the pumped liquid may be burning hot and
under high pressure.
Before assembly
Gaskets and O-rings should always be replaced when the pump is overhauled.
• Clean and check all parts.
•Order new O-ring kits.
• Replace defective parts by new parts.
The pump must be serviced by a qualified person.
Service must be carried out in accordance with local regulations and accepted codes of good practice.
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2.1 Dismantling the pump
2.1.1 Changing the position of the terminal box
1. Remove the inspection screw pos. 1 and the four screws pos. 2 in the stator housing, see Fig. 1
.
2. Turn the stator housing pos. 3 to the position required.
If the stator housing has been prised/lifted off the pump housing, continue with point 2 in 2.1.2
Replacing
the stator unit including the rotor unit.
3. Fit the four screws and the inspection screw.
Fig. 1 Changing the position of the terminal box
2.1.2 Replacing the stator unit including the rotor unit
1. Remove the inspection screw pos. 1 and the four screws pos. 2 in the stator housing, see Fig. 1
.
2. Lift off the stator housing pos. 3.
3. Remove the rotor and the O-ring from the pump housing or stator housing.
4. Check that the O-ring pos. 6 is intact. If the O-ring is damaged, it must be replaced.
5. Fit the rotor and the O-ring on the pump housing.
6. Put a tee key or a long screwdriver through the stator and hold the rotor while fitting the stator on the
pump housing. See Fig. 2
.
The purpose is to protect the O-ring, as otherwise the magnetic force will cause the rotor to jerk up in the
stator.
Fig. 2 Holding the rotor
7. Turn the stator housing pos. 3 to the position required.
8. Fit the four screws and the inspection screw.
TM02 5506 3402 TM02 5507 3402
2
3
1
5
4
6
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3. Fault correction
3.1 Fault finding
Fault finding should always start with a check that the external conditions for correct function are OK. This is
done by checking:
• that the mains supply is in accordance with the data on the nameplate,
• that the installation was carried out according to the installation and operating instructions,
• that the external on/off switch has been connected correctly,
• that the desired setpoint signal is available,
• that the requested sensor signal is available.
3.1.1 Printing of data registers
The Grundfos R100 remote control enables the printing of status for the data registers by means of a Hewlett
Packard infrared printer.
The purpose of this is to ensure that the service technician can print out the data registers before starting the
fault finding so that this print stating the original fault information can be enclosed, in case the product is returned to Grundfos.
The pump must be serviced by a qualified person.
Service must be carried out in accordance with local regulations and accepted codes of good practice.
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