mr
.
steam
®
C U S E R I E S
Installation, Operating & Maintenance Manual
26
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 the Boiler off.
PROGRAMMING
For CU steam bath
generators equipped with
Automatic Blowdown Systems
CU 81500 and CU 81600,
refer to the following instruc-
tions 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 load
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
switch is in the OFF position.
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 discre-
tion of the owner/operator
as follows.
3-WAY MANUAL OVERRIDE SWITCH
I = permanent ON
I
= automatic
= 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
DO
O N
NO
OT
Tss
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
DO
Oss
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 clouding,
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 cleaning,
should be replaced.
STORING
Keeping gauge glass in original packaging until ready
to install.
