Installation
13
© Lutz-Jesco GmbH 2021
Subject to technical changes.
210527
BA-22404-02-V03
Chlorine changeover unit
C 7520
Operating instructions
Resources required:
@
Grease-dissolving cleaner
@
Liquid thread sealant
Perform the following working steps:
1.
Clean the thread with a fat-dissolving cleaning agent, e.g. alcohol.
2.
Allow the thread to dry completely.
3.
Apply the thread sealant to the external thread in a circular motion to
the start of the thread. Leave the first thread clear. Apply the thread
sealant all the way down to the root of the thread to thoroughly
grease the thread flank.
Fig. 5: Seal in the thread
4.
Insert the threaded pin into the internal thread and apply a little
thread sealant to the internal thread. Screw the parts by hand.
5.
Use a tool to tighten the connection. The necessary tightening torque
depends on the thread size. For a 1" NPT pipe thread, the tightening
torque is up to 150 Nm.
6.
Remove excess thread sealant with a cloth.
7.
Allow the bond to harden for at least 12 hours prior to the leak test.
ü
The threaded connection is now complete.
7.3.2 Creating the flange connection
Fig. 6: Installing the flange connection
Precondition for action:
ü
The inside of the line is clean and dry.
ü
The sealing surfaces are free of contamination and damage.
ü
Seals must be clean, undamaged and dry.
ü
Bolts, nuts and washers are clean and undamaged.
i
Any bolts, nuts and washers that are removed during
assembly work must be replaced with new ones if they are
damaged. Install only new screws, nuts and washers.
Resources required:
@
Torque wrench AF 19 (10 – 25 Nm)
1.
Lubricate the sliding faces and thread of bolts, nuts and washers e.g.
using fitting grease or PTFE grease.
2.
Place the flat gasket (2) into the groove of the connection flange (3).
Assemble the seal in dry condition.
3.
Mount the tongue flange (1). Make sure that the flat gasket (2) does
not slip.
4.
Fit the bolts (7), washers (6, 5) and nuts (4) by hand.
5.
Tighten the bolts evenly alternately crosswise in three stages: 10 Nm,
18 Nm, 25 Nm.
6.
Retighten all the bolts to the full target tightening torque (25 Nm).
7.
Setting the seal (adapting to the flange seal surface) can make it nec-
essary to retighten the bolts. For this reason, retighten the bolts to 25
Nm after a few hours.
ü
Flange connection assembled
7.4 Electric installation
DANGER
Mortal danger from electric shock!
Improperly installed or damaged components in the electronics instal-
lation can cause injury.
ð
Ensure that all work on the electrical installation is performed by a
qualified electrician.
ð
Ensure that all work on the electrical installation is performed in a
de-energised state.
ð
Ensure that the power supply is secured with a fault current protec-
tive circuit.
ð
Replace damaged cables or components without delay.
Open the control housing
Resources required:
@
Flat-bladed screwdriver, size 3
Perform the following working steps:
1.
Hold the screwdriver in the right-hand clearance on the front of the
housing.
2.
Move the screwdriver grip towards the lid of the housing until the
hinge part disconnects from the adjustment lock.
3.
Pivot the housing lid to the left.
ü
Housing opened.
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