190.210-IOM (SEP 21)
Page 16
LazerWeld II Plate Heat Exchanger
Maintenance
7. Open the remaining four bolts alternately and diago-
nally in two steps. See the following figures.
NOTICE
Be careful to ensure that the frame plate and pressure
plate are always in parallel. Skewing of the pressure
plate during opening must not exceed 10 mm (2 turns
each bolt) across the width and 25 mm (5 turns each
bolt) vertically.
.
a. Loosen the four bolts alternately and diagonally until
the plate package is approximately 5% greater than
the A dimension (1.05A).
Figure 32: Loosen the bolts based on dimension A
b. Loosen the two diagonal pairs of bolts alternately, as
shown in the following figure.
Figure 33: Loosen the diagonal pairs of bolts
8. Open the plate pack by letting the pressure plate glide
on the carrying bar.
CAUTION
To avoid hand injuries from sharp edges, always wear
protective gloves when handling cassettes and
protective sheets.
NOTICE
Number the cassettes before removing them.
Cassettes do not need to be removed if cleaning is
done using only water, or without cleaning agent.
Figure 34: Remove the cassettes
WARNING
The plate pack may still contain a small residual
amount of liquid after draining. Depending on the
type of product and type of installation, special ar-
rangements, such as drainage box, may be necessary
to avoid injury to personnel and damage to equip-
ment.
Manually cleaning opened units
CAUTION
Never use hydrochloric acid with stainless steel
plates. Water of more than 330 ppm Cl may not be
used for the preparation of cleaning solutions. It is
very important that carrying bars and support col-
umns in aluminium are protected against chemicals.
NOTICE
Be careful not to damage the gasket during manual
cleaning.
Deposits removable with water and brush
Note:
For manual cleaning of heat exchangers in refriger-
ant services, contact your Frick representative.
WARNING
If necessary, use appropriate protective equipment.
Consider risks like loose particles and what kind of
media has been used in the PHE.
A
A
