Energy Tech Laboratories F3 ユーザーズマニュアル

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.

.  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 30.

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, 

.  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.

.  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 9 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.