MAINTENANCE.
If the installation is set up as per the above instructions, and if the pre-set factory
values are unchanged, the Stokvis Econoplate Unit should not need dismantling for
service for many years.
Any clogging, may be detected as follows:
- A high pressure drop between inlet and outlet of the secondary hot water circuit.
- A small temperature drop between inlet and outlet of the primary circuit (under 20°C at
full load the exchanger is clogged).
If it is required to clean the Plate Heat Exchanger the following instructions should be
followed:
-
Isolate the exchanger, primary first, then allow the
temperature to fall below 40
o
C, then isolate the secondary.
-
Reduce the pressure by opening the vents and drain both primary and
secondary.
-
Carefully release the securing bolts between the frame and front plate.
Slacken the bolts in sequence to reduce stress on individual bolts.
- Remove the plates one at a time from the unit. If possible keep the plates in order
ready for re-assembly; otherwise refer to the following notes and separate instruction
sheets.
- A plate pack always has a 4 hole first plate which has a gasket around all 4 ports. This
plate sits against the fixed chassis plate. Next are a number of intermediate plates,
which are identical on parallel flow units but on cross flow units consist of left and right
handed plates. Finally a blank plate with no ports.
-
Carefully clean the plates. (Do not use a metallic device). Use a
nylon brush with water. A proprietary de-scaling agent may be used if
necessary, always rinse thoroughly with clean fresh water. Always
follow the correct safety procedures when handling chemicals.
-
Re-assemble the plates in the same order that they were removed.
Replace front plate and tighten the bolts in a similar manner to that used on an
automobile cylinder head to ensure an even distribution of force over the surface of
the plate.
The tightening figures are as follows.
G30:- 3.1 mm per plate for E3A
The E3C units have been fitted with various plates which have the following tightening
figure.
GL13:- 3.4mm per plate
GX12:- 3.4 mm per plate
This distance should be measured next to each bolt to ensure even tightening of the
plate pack.
21
Summary of Contents for ECONOPLATE E3 Series
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