Operating instructions

(5) CLEAN STEAM HEATING SYSTEM for trouble
free operation. Oil, greases and sediments which accu-
mulate in a new boiler and piping must be removed from
the system in order to prevent an unsteady water line
and carry over of water into the Supply Main above boil-
er.
a. Operate the boiler with steam in the entire system
for a few days allowing the condensate to return to
the boiler. If the condensate can temporarily be
wasted, operate boiler only for the length of time
it takes for condensate to run clear. If the latter
cannot be achieved or if the condensate is return-
ed to the boiler,
boilout the boiler using the SUR-
FACE
BLOWOFF connection, see Figure 4.
1). Drain boiler until water is just visible in gauge
glass. Run temporary
1%" pipe line from the Surface
Blowoff Connection to an open drain or some other loca-
tion where hot water may be discharged safely. Do not
install valve in this line.
2).
Drain about 5 gallons of hot water from boiler into
a container and dissolve into it
1 pound of caustic soda
and
1 pound of trisodium phosphate for each 50 gallons
of boiler water. See table below. Remove safety valve
and add solution to boiler water thru exposed tapping.
Boiler Water Capacity
Caustic Trisodium
No.
to Water Line Soda
Phosphate
gals. Ibs. lbs.
PF-34 27 0.5 0.5
PF-35 33 0.7 0.7
PF-36 40 0.8 0.8
PF-37 46 0.9 0.9
(Caution
: Use extreme care in handling these chemicals.
Caustic Soda is harmful to skin, clothing, and eyes.
Do
not permit the dry material or the concentrated solution
to come into contact with skin or clothing.)
3).
Start burner and operate sufficiently to boil the
water without producing steam pressure. Boil for
about 5 hours. Open boiler feed pipe sufficiently to per-
mit a steady trickle of water from the surface blowoff.
Continue this slow boiling and trickle of overflow for
several hours until the water coming from the overflow
is clear.
4).
Stop burner and drain boiler in a manner and to
a location that hot water can be discharged with safety.
5). Refill boiler to normal water line. If water in
gage glass does not appear to be clear, repeat steps 1)
thru
3) and boil out the boiler for a long time.
6). Remove temporary surface blowoff piping, plug
tapping and reinstall safety valve.
Boil or bring water
temperature to 180°F promptly in order to drive off the
dissolved
g.ases in the fresh water.
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 Figures 7 and
8 and
proceed as follows:
7). Connect hoses from Drain Cocks to floor drain.
Close Gate Valve in Hartford Loop and open Drain Cock
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.
8). Close all Radiator Valves. Remove all Supply Main
Air Valves and plug the openings in Supply Main.
9). Draw about
5 gallons of Hot Water from Boiler
into a container and dissolve into it the quantities of
caustic soda and trisodium phosphate shown in 2.) above.
Remove Safety Valve from Boiler and pour this wlution
into Boiler, then reinstall Safety Valve.
10). Turn on Oil Burner and keep operating while feed-
ing 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. Con-
tinue until water runs clear from drain hose for at least
30 minutes.
11). Stop feeding water to Boiler but continue operat-
ing
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. Re-
install all Supply Main Air Valves. Open Gate Valve in
Hartford Loop.
12).
When Boiler has cooled down sufficiently
(crown-
sheet of Sections are not too hot to touch), close the
Drain Cocks 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 is clear, the Boiler is ready for
service. If this sample is not clear, repeat the cycle of
draining the Boiler and Return Main and refilling the
Boiier until sample is clear.
13). If the Boiler water becomes dirty again at a later
date due to additional sediment loosened up in the pip-
ing, close Gate Valve in Hartford Loop, open Drain Cock
in Return Main, turn on Oil Burner and allow Conden-
sate to flow to drain until it has run clear for at least
30 minutes while feeding water to Boiler so
as to main-
tain normal water level. Turn off Oil Burner, drain
Boiler, open Gate Valve in Hartford Loop, then repeat
step 12 above.