ClimaCool UCR 30, 50 and 70 tons Manual - Manual (Page 59)

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Step 1. (Clamped Lid Models): remove the top of the 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 a steel
brush.
Step 4. Wash the strainer element off with clean water. It is
preferable to use a hose with a signifi cant amount of water
pressure. Do not use a pressure washer.
Step 5. Wash all matter from the strainer gaskets and clean
the inner-ring where the bottom of the strainer element rests.
Step 6. Make sure the U-shaped gasket is fi tted securely to
the bottom of the strainer element.
Reposition the strainer element into the body of the strainer.
Step 7. Make sure the strainer head gasket is secure on the
top of the strainer body. On V-band models, O-rings should be
seated completely in the body fl ange. Reposition the strainer
lid back on the strainer body. Tighten the lid securely either
with the bolts or with the band-clamp.
*For clamped models, opening and closing is achieved
without adjusting the lock nut. It is tightened at the factory
to the correct compression. (Minor tightening may be
necessary if the gasket loses memory over time.) To open the
clamp, depress the safety latch and pull the over-center lever
outward. To close the clamp, make sure the T-bolt is seated
in its receiver and push the over-center lever back toward
the strainer housing. Be sure that the safety latch is engaged
before putting the unit to use.
What is Water Hammer?
Water hammer is a phenomenon that can occur in fl uid
systems with long pipes. Water hammer is a rapid change of
pressure caused by a rapid change in velocity. If the fl ow has
been abruptly shut off downstream, the pressure in the entire
system is raised very quickly.
What Causes Water Hammer?
Any action that can cause a rapid change in the velocity
of the fl ow can set off a water hammer, such as closing a
downstream valve, pump stoppage, etc. Typically, for short
lengths of pipe (below 500 feet) downstream valves that
are closed within 1/10th of a second can generate a water
hammer.
What Can Water Hammer Do?
Pressure spikes from water hammer can raise fl uid pressures
to dangerously high values. These pressure spikes can cause
serious damage to valves, pipes, strainers, joints, etc. The
CS strainer is rated to an absolute maximum pressure of 150
PSI for bolted lid models, and 125 PSI for clamp lid modes.
A water hammer pressure spike that raises the pressure
higher than the maximum rated pressure may result in
strainer damage, voiding the manufacturer’s warranty.
What Can I Do to Prevent Water Hammer?
There are certain precautions that can be taken to prevent
or decrease the eff ect of water hammer. The addition of a
surge tank or accumulator fi tted with a suitable pressure
relief valve and strategically located within the water system
may provide adequate protection against the eff ects from
water hammer. Careful attention should be given to the
design and control strategy for valves and pumps so their
actions do not invite a water hammer.
Stainless Steel Strainer Options
Automatic Timer Flush (AFT) Package Option
The ATF-EA-1.5 fl ush valve package provides an automatic
method for fl ushing away the debris collected in the
strainer’s reservoir. The power supply and timer controls for
the valve package are housed inside the ATF control box.
The ATF controls can be pre-programmed to set the fl ushing
duration and the time interval between fl ushes.
System Components
1. Timer based valve controller: (see Figure 3) sets the
fl ush duration (length of the fl ush) and the fl ush interval
(time between fl ushes).
2. Electric Ball Valve: designed for dirty water use (see
Figure 3 & 4).Figure 3Figure 4 Figure 5
Valve Specifi cations (See Figure 5)
A. Water-resistant polypropylene motor case
B. High torque motors with perma-lube gears
C. Open and close indicator
D. Stainless steel ball valve and hardware
E. Auto reset circuit breaker
F. 90 degree bidirectional rotation
G. Controller
case
Operation Instructions
Flush valve line must be piped to atmospheric pressure such
as an open fl oor drain. The fl ush line should not undergo any
changes in elevation and should be sloped downward in the
direction of drainage. Do not pipe the fl ush or drain line into a
pressurized line.