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steam
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C U S E R I E S Installation, Operating & Maintenance Manual
27
24-HOUR AND 7-DAY TIME SWITCHES
NOTE: The Time Clock controls boiler operation. The boiler is
ON when the timer is ON. The Blowdown Valve will open when
the Timer turns OFF.
PROGRAMMING
For CU steam bath generators
equipped with Automatic Blowdown
Systems CU 81500 and CU 81600,
refer to the following instructions for
time clock operation and settings.
Timer settings for blowdown operation
are at the discretion of the
owner/operator.
The weekly program dial shows the
seven days of the week and AM/PM imprints for each day.
The time switch is set by pushing the captive trippers to the
outer ring position for the entire period that the boiler is to be
turned ON, i.e., 2 hours to each tripper on the 7-day dial. When
the tripper is pushed to the inside, the boiler is in the OFF posi-
tion, and initiating the blowdown cycle. Due to the timer having
one tripper for every 2 hours, the boiler will need to be OFF a
minimum 2 hours. If less down time is needed the digital timer
(103662) can be set to the minute.
SETTING TIME
To set the current time and day of week, turn the
minute hand clockwise. Do not set the time by rotating
“Outer” Dial.
Turn the minute hand clockwise until the day of the week and
the time of day on the outer dial is aligned with the triangle
marker on the inner dial (two o'clock).
Example for 7-day program dial Monday 10:30 AM. Turn the
minute hand clockwise until Monday 10:30 AM is aligned with
the triangle on the inner dial. The hour and minute hand will
show exactly 10:30.
FOR MANUAL OVERRIDE
Manual override can be accomplished
at the discretion of
the owner/operator
as follows.
3-WAY MANUAL OVERRIDE SWITCH
I = Boiler Permanent ON I
= Automatic
= Boiler Permanent OFF
IMPORTANT: It is recommended that for periodic and effective
blowdown,the override switch be set in the automatic setting.
WATER GAUGE & GAUGE GLASS
USE AND CARE
D
D
O
O
N
N
O
O
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DO NOT use glass if it contains any scratches, chips,
or any other visible signs of damage.
DO NOT reuse any tubular glass or glass packings.
DO NOT subject gauge glass to bending or torsional
stresses.
DO NOT over tighten glass packing nuts.
DO NOT allow glass to touch any metal parts.
DO NOT exceed the recommended pressure of the
gauge or gauge glass.
DO NOT clean the gauge or gauge glass while pres-
surized or in operation.
D
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DO verify proper gauge has been supplied.
DO examine gauge glass and packings carefully for
damage before installation.
DO install protective guards and utilize automatic ball
checks where necessary to help prevent injury in
case of glass breakage.
DO inspect the gauge glass daily, keep maintenance
records, and conduct routine replacements.
DO protect glass from sudden changes in tempera-
tures such as drafts, water spray, etc.
MAINTENANCE
Examine the gauge regularly for any signs of cloud-
ing, scratching, erosion, or corrosion. The glass should
be inspected daily until the need for replacement
becomes apparent. This will help establish the routine
inspection and routine replacement schedules.
CLEANING
Use commercial non-abrasive glass cleaners to keep
glass clean. Use diluted acids such as Hydrochloric
(muriatic) acid when regular cleaners do not seem to
work. Do not use wire brushes or any other abrasive
materials which could scratch the glass.
INSPECTION
Examine the surface of the glass for scratches, corro-
sion, chips, cracks, surface flaws, or nicks. To do this,
shine a very bright concentrated light at an angle of
about 45 degrees. A defective glass will glisten as
the light strikes imperfections. Glass which appears
cloudy or roughened, and will not respond to clean-
ing, should be replaced.
STORING
Keeping gauge glass in original packaging until
ready to install.
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