User Guide

45
103876-08 - 1/19
CL
Installation & Service Manual
iii. Start burner and operate sufficiently to
boil the water without producing steam
pressure. Boil for about 5 hours. Open
boiler feed pipe sufficiently to permit a
steady trickle of water from the surface
blow-off pipe. Continue this slow boiling
and trickle of overflow for several hours
until the water coming from the overflow
is clear.
iv. Stop burner and drain boiler in a
manner and to a location that hot water
can be discharged with safety.
v. Refill boiler to normal water line. If water
in gauge glass does not appear to be
clear, repeat steps (i. thru iii.) and boil
out the boiler for a longer time.
b. Low pressure steam boilers such as the
CL Series should be maintained with
appropriate water treatment compounds.
Add suitable water treatment compounds
as recommended by your qualified water
treatment company.
c. Remove temporary surface blow-off piping,
plug tapping and reinstall safety valve.
Boil or bring water temperature to 180°F
promptly in order to drive off the dissolved
gases in the fresh water.
d. If unsteady water line, foaming or priming
persist, install gate valve in Hartford Loop
and drain valves in return main and at boiler
as shown in Figure 13 and proceed as
follows:
i. Connect hoses from drain valves to floor
drain. Close gate valve in Hartford Loop
and open drain valve in return main. Fill
boiler to normal water level, turn on oil
burner and operate boiler at this water
level for at least 30 minutes after the
condensate begins to run hot, then turn
off burner.
Close all radiator valves. Remove all
supply main air valves and plug the
openings in supply main.
ii. Draw about 5 gallons of hot water from
boiler into a container and dissolve
into it the appropriate amount of a
recommended boilout compound.
Remove safety valve from boiler and
pour this solution into boiler, then
reinstall safety valve.
iii. Turn on oil burner and keep operating
while feeding water to boiler slowly. This
will raise water level in boiler slowly so
that water will be boiling hot and will
rise slowly into supply main and back
through return main, flowing from drain
hose at about 180°F. Continue until
water runs clear from drain hose for at
least 30 minutes.
iv. Stop feeding water to boiler but
continue operating oil burner until
excess water in boiler flows out through
supply main and water lowers (by
steaming) until it reaches normal level
in boiler. Turn off oil burner. Drain boiler.
Open all radiator valves. Reinstall all
supply main air valves. Open gate valve
in Hartford Loop.
v. When boiler has cooled down
sufficiently (crown sheet of sections are
not too hot to touch), close the drain
valves at boiler and in return main and
feed water slowly up to normal level
in boiler. Turn on oil burner and allow
boiler to steam for 10 minutes, then turn
off burner. Draw off one quart of water
from bottom gauge glass fitting and
discard. Draw off another quart sample
and if this sample is not clear, repeat
the cycle of draining the boiler and
return main and refilling the boiler until
sample is clear.
vi. If the boiler water becomes dirty
again at a later date due to additional
sediment loosened up in the piping,
close gate valve in Hartford Loop, open
drain valve in return main, turn on oil
burner and allow Condensate to flow
to drain until it has run clear for at least
30 minutes while feeding water to boiler
so as to maintain normal water level.
Turn off oil burner, drain boiler, open
gate valve in Hartford Loop, then repeat
the full "Boiler and System Cleaning"
procedure outlined in Paragraph B
starting on Page 43.
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.
7 Maintenance and Service Instructions (continued)