Disassembly - CIAT ITEX Manuel D'instructions

ENGLISH
Short-term storage (< 3 months)
1) Gradually lower the pressure in each circuit.
2) Turn off the pumps and close the shut-off valves, starting
with the hot circuit and then the cold circuit.
3) Let the heat exchanger cool to room temperature.
4) Completely drain the heat exchanger and close the drain
and vent valves.
Long-term storage (> 3 months)
Carry out the above steps as well as the following:
1) Flush the heat exchanger circuits with water to remove all
residue.
2) Loosen the nuts on the tie bolts to reduce the compression
on the gaskets.
3) Apply a rust preventive on the tie bolts.
4) When recommissioning the heat exchanger, lubricate the
tie bolts and guide bars then go to section 4.1.
5) Retighten the plates to the dimension shown on the name-
plate.

5.2 - Disassembly

• Breaking the special quality strap around the heat exchang-
er will void the warranty. You must obtain CIAT's written per-
mission in order to remove the strap.
• Store the plates on a flat, clean surface away from ferrous
particles and dirt.
• For easier reassembly, stack the plates in the order of as-
sembly or number them.
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Procedure
1) Disconnect the pipes at the back of the frame (multi-circuit
units).
2) Clean and lubricate the tie-rods.
3) Measure the tightening dimension.
4) Loosen all the nuts in the order shown in Figure 11 (page
20). Pull back the movable follower and carefully remove
the plates one by one so as not to damage them.Wear
protective gloves while doing so as the edges of the plates
are sharp.
5) Remove the gaskets by lifting the tabs out of their slots on
the edges of the plates.
6) Clean the heat exchanger.
• Separate the plates with care, paying particular attention to
the fastening of the Plug-In® gaskets; the gaskets tend to
stick to the plates after a period of prolonged operation at
high temperatures. Gaskets that retain their original proper-
ties may be reused.
• Never mix new and old gaskets as the difference in elastic-
ity will result in overcompression of the new gaskets and
reduce their service life.
NUTS & BOLTS SIZE DN 32
Model PWB2 PWB4 PWB8 PWB7 PWB16 PWB26 PWB11 PWB18 PWB30 PWB45 PWB70 PWB40 PWB60 PWB90
PS6 frame tightening bolts (1) M12 M16
19 24
Spanner size
PS10 frame tightening bolts (1) M14
22
Spanner size
PS16 frame tightening bolts (1) M14 M16
Spanner size 22 24
PS25 frame tightening bolts (1) M16
Spanner size 24
Top guiding bar front (2) / rear (3) M12
Spanner size 19
M12
Bottom guiding bar front (4) / rear (5)
Spanner size 19
M10
Feet (6)
Spanner size 17
(*) FRAME WITH FLANGED CONNECTIONS
14 Allen key
(**) FRAME WITHOUT LATERAL EXTREACTION
(up to beginning 2012)
Top guiding bar (2) and (3):
PWB11 M22 / PWB18 M20
Spanner size:
PWB11 32 / PWB18 30
Bottom guiding bar (4) and (5):
PWB11 M22 / PWB18 M20
Spanner size:
PWB11 32 / PWB18 30
ENGLISH
DN 50 DN 65 (**) DN 100 DN 150
- M16 M20 - -
- 24 30 - -
M20 M20 M24 / M33 M24 / M33
30 30 36 / 50 36 / 50
M20 M20 - M24 / M33 M24 / M33
30 30 - 36 / 50 36 / 50
M20 - - M24 / M33 - -
30 - - 36 / 50 - -
M16 M16 M20 M18 M20
24 (*) 24 30 27 30
M16 M16 M20/M16 M18 M20
24 (*) 24 30/24 27 30
M16 M16 M16 M16
24 24 24 24
DN 200
PWB65 PWB99
- -
- -
M33 / M39 M33
50 / 60 50
M33 / M39 M33
50 / 60 50
- -
- -
M20
30
M20 EN
30
M16
24
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