EN - 11
E N
5.8 - Reassembly
- Before reassembling the heat exchanger, make sure that all the plates and gaskets are clean and free of grease.
- When arranged correctly, the stacked plates form a honeycomb pattern (Fig.10).
- The order of assembly and the plate direction are specified on the plate arrangement drawing.
Procedure
1) Starting from the fixed head, assemble the plates on the bar one by one with the gaskets facing the fixed head.
2)Clean and lubricate the tie-rods, position them on the frame, then tighten the nuts gradually and evenly in the order indicated
in Fig.11 until the correct dimension is obtained between the plates (tightening dimension), as specified on the data plate.
Check that this dimension is the same on each side.
- Overtightening may irreversibly distort the plates. If you feel it is necessary to tighten beyond the recommended dimension,
contact CIAT’s After-Sales Department to obtain advice.
3)It is recommended to perform a pressure test after all maintenance on the plates and gaskets in order to check the heat
exchanger’s internal and external tightness. The maximum pressure for each circuit should be equal to the operating pressure
and should never exceed the rated pressure (PS) specified on the data plate. The recommended testing time is at least 10
minutes. Nevertheless, it remains the user's responsibility to check national standards and local codes affecting such a test. If
different test conditions are required, please note that the heat exchangers should never be tested at pressures greater than
the test pressure (PT) specified on the data plate and that the pressure differences between the two circuits during testing
should never be higher than the maximum allowable differential pressure.
4)If a leak occurs, lower the pressure then retighten the nuts and repeat the test. If the leak persists, check the gaskets and plates
for signs of wear, damage or dirt. If necessary, replace the gaskets.
5.9 - Plate codes
No.
type
1
K1234H*
2
Z1234L
3
K1234H
4
Z1234L
5
K1234H
6
Z1234L
7
K1234H
8
Z1234L
9
K1234H
10
Z1234L
11
K1234H
12
Z1234L
13
K0000H
Example with balanced
H and L patterns
Code
Example: with plate No. 10: Z1234 L
10 = sequence number
The first letter indicates the plate direction and gasket position (Fig. a)
K = strip on left Z = strip on right
Drilling the collectors (Fig. c). Code which indicates the position and the
open or closed status of the collectors.
1234 = open
0 = Closed
e.g.: 1204 : indicates that porthole No. 3 is closed.
The last letter indicates the plate type (Fig. b):
H = HIGH EFFICIENCY plate with wide chevron pattern
L = LOW DELTA P plate with narrow chevron pattern
Fig.b
Fig.c
Fig.a
K
Z
L
H
1
2
4
3
Fig.10
Fig.11
Summary of Contents for ITEX NA 10.51 D
Page 2: ......