U.S. Boiler Company V8H SERIES, Инструкция по установке, эксплуатации и обслуживанию

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e. Make pH or Alkalinity Test.
After boiler and system have been cleaned and
refilled as previously described, test the pH of
the water in the system. This can easily be done
by drawing a small sample of boiler water and
testing with hydrion paper which is used in the
same manner as litmus paper, except it gives
specific readings. A color chart on the side of the
small hydrion dispenser gives the reading in pH.
Hydrion paper is inexpensive and obtainable
from any chemical supply house or through your
local druggist. The pH should be higher than
7, but lower than 11. Add some of the washout
chemical (caustic soda), if necessary, to bring the
pH within the specified range.
f. Boiler is now ready to be put into service.
2. WATER BOILERS
a.
Filling of Boiler and System — General —-
In a
hot water heating system, the boiler and entire
system (other than the expansion tank) must be
full of water for satisfactory operation. Water
should be added to the system until the boiler
pressure gauge registers 12 psi. To insure that the
system is full, water should come out of all air
vents when opened.
b. Boiling Out of Boiler and System. The oil and
grease which accumulate in a new hot water
boiler can be washed out in the following
manner.
i . Remove relief valve using extreme care to
avoid damaging it.
ii . Add an appropriate amount of recommended
boil out compound.
iii . Replace relief valve.
iv
. Fill the entire system with water.
v
. Start firing the boiler.
vi . Circulate the water through the entire
system.
vii . Vent the system, including the radiation.
viii . Allow boiler water to reach operating
temperature, if possible.
ix . Continue to circulate the water for a few
hours.
x
. Stop firing the boiler.
xi . Drain the system in a manner and to a
location that hot water can be discharged
with safety.
xii . Remove plugs from all available returns
and wash the water side of the boiler as
thoroughly as possible, using a high-
pressure water stream.
xiii. Refill the system with fresh water.
c. Add appropriate boiler water treatment
compounds as recommended by your qualified
water treatment company.
d.
Make pH or Alkalinity Test.
After boiler and system have been cleaned and
refilled as previously described, test the pH of
the water in the system. This can easily be done
by drawing a small sample of boiler water and
testing with hydrion paper which is used in the
same manner as litmus paper, except it gives
specific readings. A color chart on the side of the
small hydrion dispenser gives the reading pH.
Hydrion paper is inexpensive and obtainable
from any chemical supply house or through
your local druggist. The pH should be higher
than 7 but lower than 11. Add appropriate water
treatment chemicals, if necessary, to bring the pH
within the specified range. With this lower level
of protection, care must be exercised to eliminate
all of the free oxygen in the system.
e. Boiler is now ready to be put into service.
C. EXCESSIVE MAKE-UP WATER
IMPORTANT
IF, DURING NORMAL OPERATION, IT IS
NECESSARy TO ADD MORE WATER THAN
INDICATED BELOW, CONSULT A qUALIFIED
SERVICE TECHNICIAN TO CHECK yOUR
SySTEM FOR LEAKS.
Model No.
Gallons Per
Month
Gallons Per
year
V8H3 0.3 3
V8H4 0.4 5
V8H5 0.5 6
V8H6 0.6 7
V8H7 0.7 8
V8H8 0.7 9
V8H9 0.8 10
A leaky system will increase the volume of make-up
water supplied to the boiler which can significantly
shorten the life of the boiler. Entrained in make-up
water are dissolved minerals, salts and oxygen. When
the fresh, cool make-up water is heated in the boiler the
minerals fall out as sediment, the salts coat the inside
of the boiler, and the oxygen escapes as a gas. The
accumulation of sediment eventually isolates the water
from contacting the cast iron. When this happens the
cast iron in that area gets extremely hot and eventually
cracks. The presence of free oxygen or chloride salts
in the boiler corrodes the cast iron from the inside.
SECTION XIII: MAINTENANCE AND SERVICE INSTRUCTIONS (cont'd)