ClimaCool IOM FLEX SERIES - Manual (Page 18)

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BOLTED LID MODELS: ClimaCool Strainer models CS-
4B, CS-6, CS-8, and CS-10 have "bolted" lid designs. Grade
5 zinc-plated bolts, nuts, and washers are used to attach the
lids to these strainers. See Table 1 for the proper lid bolt
size and torque rating for each strainer. (Exercise care when
tightening the lid bolts so as not to damage the strainer lid or
housing).
It is important to follow the torque specifications as over-
tightening may result in premature failure of the bolts. It is
equally important to follow a star wheel torque pattern when
tightening the lid bolts (see Fig. 2). The strainer lid may not
be seated down completely after the first torque sequence
(this is especially evident on the larger strainers such as
the CS-8 and larger). A second torque sequence should be
adequate to seat the lid securely to the body.
Strainer Operation
Periodically, it will be necessary to flush out the debris that
is collected and settles to the bottom of the strainer reservoir.
The larger ClimaCool strainers (CS-4, CS-6, CS-8, and
CS-10) are equipped with a flush port (or drainage port)
extending inside the strainer. When it becomes time to clean
the strainer, the flush port valve should be opened while the
strainer is in operation (while pressurized and with water
flowing). A thorough flushing of the strainer reservoir will
depend upon the length of time the flush valve remains
opened. This flush time will typically range from 15 to 60
seconds depending on the flow, inlet water pressure, and the
amount of debris collected by the strainer. As a general rule,
the larger strainers will require higher inlet water pressures
in order to achieve a complete flushing. For example, the
CS-4 model can be flushed with inlet water pressures as low
as 15 PSI, while the CS-6 can be flushed with 30 PSI. The
CS-8 and CS-10 models should be flushed with inlet water
pressures greater than 40 PSI.
Stainless Steel Strainer Option
Note: When shutting down the chiller for extended periods
of time, the strainer should be isolated and completely
drained.
Strainer Element Cleaning
If your strainer assembly is equipped with optional pressure
gauges, you will be able to monitor the pressure differential
between the inlet and outlet sides of the strainer. Under a
normal "clean" strainer operation this pressure difference
should be slightly under 1 PSI. When this pressure
differential reaches 5-10 PSI, the strainer element may
require cleaning.
CAUTION: PRIOR TO DISMANTLING THE
STRAINER FOR CLEANING, IT IS IMPERATIVE
THAT THE STRAINER ASSEMBLY IS ISOLATED
AND COMPLETELY DE-PRESSURIZED.
Follow these steps when cleaning the ClimaCool Strainer
element:
Step 1 (Bolted Lid Models): Remove the top of the
ClimaCool Strainer by removing the Grade 5 Zinc plated
bolts from the lid.
Step 1 (Band-Clamp Lid Models): Remove the top of the
ClimaCool Strainer by taking off the band-clamp assembly.
Step 2: Lift the strainer element (conical screen) out of the
strainer body.
Step 3: Carefully scrub down the strainer element with a
rigid nylon brush until all matter is loosened. DO NOT USE
STEEL BRUSH
Step 4: Wash the strainer element off with clean water. It
STRAINER BOLT SIZE RECOMMENDED TORQUE
CS-2 (Clamp) 5/16 - 18 40 - 50 in. lbs.
CS-3 (Clamp) 5/16 - 18 60 - 80 in. lbs.
CS-4C (Clamp) 5/16 - 18 75 - 85 in. lbs.
CS-4B 3/8 -16 15 - 25 ft. lbs.
CS-6 1/2 - 13 45 - 55 ft. lbs.
CS-8 1/2 - 13 45 - 55 ft. lbs.
CS-10 5/8 - 11 80 - 100 ft. lbs.
Fig. 2 - Recommended
Torquing Sequence
Table 1