Maintenance; Mechanical Seal; Motor + Module; Screw Tightening Torques - salmson LRE Serie Instrucciones De Montaje Y Puesta En Servicio

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10 MAINTENANCE

Prior to maintenance or repair work switch off the instal-
lation and secure against unauthorised switching.
In the event of high water temperatures and system
pressure, allow the pump to cool down first. Risk of scal-
ding!

10.1 Mechanical seal

The mechanical seal is maintenance-free. Some dripping may
occur during the breaking-in period. Regular visual inspection
is nevertheless required. Should clearly visible leakages be pre-
sent, the seal must then be replaced.
Changing the mechanical seal (FIG. 10, 11):
Switch off the installation and secure against unautho-
rised switching.
Close shut-off valves before and after the pump.
x
Depressurise pump by opening the vent valve (pos. 1.31).
x
Risk of scalding due to hot flow media!
Disconnect motor if the cable for dismantling the
x
motor is too short.
Detach pressure gauge lines of the differential pressure sen-
x
sor.
Loosen motor fastening screws on motor flange and lift motor
x
out of pump using suitable lifting gear.
Loosen circlip and remove impeller from pump shaft.
x
Loosen second circlip and spacer and remove impeller from
x
pump shaft.
Remove mechanical seal from the shaft.
x
Carefully clean shaft fitting/seating surfaces.
x
Remove mechanical seal's counter-ring with packing from
x
the motor flange and the O-ring and clean the seal seatings.
Press new mechanical seal counter-ring with packing into the
x
seal seating of the motor flange. Commercially available
washing-up liquid (a few drops) can be used as a lubricant.
Fit new O-ring.
x
Slip new mechanical seal onto the shaft. Commercially avai-
x
lable washing-up liquid (a few drops) can be used as a lubri-
cant.
Assemble impeller with spacers and circlips. Avoid damaging
x
the mechanical seal by fitting askew.
Carefully insert preassembled latern unit into the pump hou-
x
sing and screw down. While doing so, hold the rotating parts
to avoid damaging the mechanical seal.
Observe the specified screw tightening torque
CAUTION!
(see 10.3)
Fit motor with suitable lifting gear and screw down the con-
x
nection to the pump housing.
Observe the specified screw tightening torque
CAUTION!
(see 10.3)
Fit the pressure gauge lines of the differential pressure sensor.
x
Connect the motor cable.
x

10.2 Motor + module

The motor bearings are maintenance-free. Increased noise
levels and unusual vibrations indicate a worn bearing. The
bearing or motor must then be replaced.
The motor/module unit should only be replaced by SALMSON's
Customer Service. Motors other than those released by the
manufacturer may not be used.

10.3 Screw tightening torques

Screw connection
Lantern-motor
Tightening torque
Nm ± 10%
M 6 9
M10 40

11 PROBLEMS, CAUSES AND REMEDIES

For problems, causes and remedies see "Error Messages /
Warning Messages" flow chart and the tables below (chapter
11).
The first column in the table lists the code numbers shown on
the display in the event of a fault.
The pump can be operated in 2 different modes. These modes
are:
"Heating" mode (HV)
x
"Air-conditioning" mode (AC)
x
The mode can be preset via the menu.

11.1 Warning messages

A warning is displayed, but the SSM relay is not operated. The
pump continues to run. The warning can occur an infinite num-
ber of times. The faulty operating condition should not be igno-
red for long periods of time. The cause must be removed.

11.2 Warning messages that develop into error messages

Exception: If the errors "E04", "E05" und "E06" are
CAUTION!
present for more than 5 minutes, they will be indi-
cated as error messages (see chapter 11).
For AC this is already the case after 2 s.
11.3 Error messages – Heating/Ventilating mode (HV)
A fault has occurred. The pump switches off and an error mes-
sage appears in the display. After 5 minutes the pump switches
back on automatically. Only if the same problem occurs 6
times within 24 hours will the pump shut down permanently
and SSM open. Manual reset is necessary.
Exception: Blocking (code Nos. "E10", "E25", "E36")
CAUTION!
switches off the unit already upon the first occur-
rence.

11.4 Error messages - "Air-conditioning" mode (AC)

A fault has occurred. The pump switches off and an error mes-
sage appears in the display and SSM opens. Manual reset is
necessary.

11.5 Emergency operation (double pump)

In the event of a communication breakdown between master
and slave, the double pump goes into emergency operation.
During the communication breakdown the master continues
to run in controlled mode, whereas the slave can no longer be
controlled. The slave reacts as a function of the previously set
DP mode.
If the error is acknowledged, both pumps will run as single
pumps. The slave, however, cannot run in controlled mode
because the pressure sensor is not connected.
As soon as the communication between master and slave is
restored, the pump automatically resumes operation in the
mode set before the fault.
48