Operating instructions

67
a. Run 1 NPT pipe from Surface Blow-Off Tapping
"L" to open drain. Do not install shut-off valve or
other restriction. See Figure 2.
b. Fill boiler to top of gauge glass.
c. Remove safety valve.
d. Pour recommended boil-out compound into boiler
through safety valve opening.
e. Reinstall safety valve in Tapping "E" with
spindle in vertical position. See Figures 1 and 2.
f. Follow Lighting or Operating Instructions to
place boiler in operation. See Figure 53, 54, 55, 56
or 57. Boil water for approximately 5 hours
without producing steam.
g. Open boiler fill shut-off valve to produce steady
trickle of water from surface blow-off pipe.
Continue boil-out for several hours until surface
blow-off water runs clear.
h. Follow instructions TO TURN OFF GAS TO
APPLIANCE. See Figure 53, 54, 55, 56 or 57.
Drain boiler and system piping.
i. Remove drain valve. Thoroughly wash boiler
water passages with high pressure spray through
drain valve tapping.
j. Fill boiler to normal waterline. If water in gauge
glass is not clear, repeat procedure starting at
step b.
k. Remove surface blow-off piping. Install 1 NPT
plug in Tapping "L". See Figure 2.
4. Add Boiler Water Treatment.
a. Remove safety valve.
b. Pour recommended compound into boiler
through safety valve opening.
c. Reinstall safety valve in Tapping "E" with
spindle in vertical position. See Figures 1 and 2.
d. Follow Lighting or Operating Instructions to
place boiler in operation. See Figure 53, 54, 55, 56
or 57.
e. Boil water or heat water to 180°F.
f. Measure boiler water alkalinity. pH should be
between 7 and 11. Add recommended water
treatment chemicals, if necessary, to bring the pH
within the specified range.
5. If unsteady water line, foaming or priming persist:
a. Follow Lighting or Operating Instructions to
place boiler in operation. See Figure 53, 54, 55, 56
or 57.
b. Install gate valve (shut-off valve) in Hartford
Loop. Install drain valves in return main and at
boiler. See Figure 23.
c. Connect hoses from drain valves to floor drain.
Close gate valve in Hartford Loop. Open drain
valve in return main.
d. Fill boiler to normal water line. Follow Lighting or
Operating Instructions to place boiler in
operation. See Figure 53, 54, 55, 56 or 57.
e. Operate boiler for at least 30 minutes after
condensate begins to run hot. Follow
instructions TO TURN OFF GAS TO
APPLIANCE. See Figure 53, 54, 55, 56 or 57.
f. Close all radiator valves. Remove all supply main
air valves. Plug openings in supply main.
g. Drain approximately 5 gallons of boiler water into
container. Mix in recommended boil-out
compound.
h. Remove safety valve. Pour recommended
compound into boiler through safety valve
opening. Reinstall safety valve in Tapping "E"
with spindle in vertical position. See Figures 1
and 2.
i. Follow Lighting or Operating Instructions to
place boiler in operation. See Figure 53, 54, 55, 56
or 57. Slowly feed water to boiler. Water will rise
slowly into supply main and back through return
main. Adjust flow to maintain approximately
180°F water from return main hose. Continue until
water runs clear from hose for at least 30 minutes.
j. Turn off water to boiler. Continue to operate until
excess water is removed from boiler and system
(by steaming) and boiler water reaches normal
waterline.
k. Follow instructions TO TURN OFF GAS TO
APPLIANCE. See Figure 53, 54, 55, 56 or 57.
Open all radiator valves. Reinstall all supply main
air valves. Open gate valve in Hartford Loop.
l. Allow boiler to cool until crown sheet is no
longer too hot to touch. Close drain valves at
boiler and in return main. Fill boiler slowly to
normal waterline.
m. Follow Lighting or Operating Instructions to
place boiler in operation. See Figure 53, 54, 55, 56
or 57. Allow boiler to steam for 10 minutes. Drain
one quart of water from lower Gauge Glass fitting.
n. Drain second quart sample from lower Gauge
Glass fitting. If sample is not clear, repeat cycle
of draining boiler and return main and refilling
boiler until sample is clear.
o. If after normal operation boiler water becomes
dirty from additional system piping sediment
returning to boiler.
i. Complete steps 5a through 5n.
ii. Complete steps 3a through 3k.
6. Make pH or Alkalinity Test.
a. 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