Burnham Series 4N Boiler Instruccion De Instalación

6.  CLEANING A WATER BOILER
 

The oil and grease which accumulate in a new hot 

water boiler can be washed out in the following manner. 

A. Remove safety relief valve using extreme care to   

avoid damaging it. 

 

B.  Drain about 5 gallons of hot water from boiler 

into a container and dissolve into it 1 pound 

of  caustic soda and one pound of trisodium 

phosphate for each 50 gallons of boiler water. 

C.  Add solution through exposed tapping, and  

 

  reinstall safety valve.

D.  Fill the entire system with water.
E.  Start firing the boiler 
F.  Circulate the water though the entire system.
G.  Vent the system, including the radiation.
H.  Allow boiler water to reach operating 

temperature, if possible.

I.   Continue to circulate the water for a few hours. 
J.  Stop firing the boiler
K.  Drain the system in a manner and to a location    

that hot water can be discharged safely. 

L.  When the boiler has cooled down to 120°F or 

less, remove plugs from all available returns and 

wash the water side of the boiler as thoroughly as  

possible, using a high-pressure water stream.

M. Refill the system with fresh water, and bring  

 

water temperature to 180°F promptly in order to    

drive off any dissolved gases.

7.  WATER BOILER OPERATION
 

The following guidelines relating to system water 

temperature fluctuation and flow through boiler must be 

observed. 

A.  It is important to operate your boiler in such a  

manner as to prevent temperature fluctuation of    

more than 40°F at any time. Rapid temperature  

changes within the boiler can create stresses in  

the boiler metal. These stresses can cause  

 

damage to the boiler by loosening tubes, or in    

more severe instances can crack tube sheet  

 

ligaments, furnaces, or waterlegs. 

B.  It is equally important to insure that there is  

 

circulation through the boiler of at least 1/2 GPM/  

BHP at all times when the  boiler is firing. 

5.  CLEANING A NEW STEAM BOILER
 

Oil, grease & sediments which accumulate in a new 

boiler and piping must be removed from the system in 

order to prevent an unsteady water line and carryover of 

the water into the supply main above the boiler. 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 the 

boiler only for the length of time it takes for condensate 

to run clear. If the latter cannot be achieved or if the 

condensate s returned to the boiler, boil out the boiler 

using the SURFACE BLOWOFF connection on the 

boilers so equipped.

A. Drain boiler until water is just visible in gauge  

 

glass. Run temporary pipe line from the surface    

blow-off to an open drain or some other location    

where hot water may be discharged safely. 

   Do not install valve in this line. 
   Certain state and local codes may restrict 

the use of some chemicals listed for cleaning 

and maintaining the boiler. Check with local 

authorities before proceeding with the use of any 

chemicals. 

B.  Drain about 5 gallons of hot water from boiler 

into a container and dissolve into it 1 pound 

of  caustic soda and one pound of trisodium 

phosphate for each 50 gallons of boiler water. 

Additional containers may be required to dissolve 

sufficient chemicals for large models. Remove 

safety valve and add solution to boiler water 

through exposed tapping. 

  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 

the skin or clothing. 

C.  Close all valves leading to and from the system to  

  isolate the cleaning solution from the system. 

D.  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 blowoff pipe. Continue this slow boiling 

and trickle of overflow for several hours until the 

water coming from the overflow is clear. 

E.  Stop burner and drain boiler in a manner and  

 

location that hot water can be discharged safety. 

F.  When the boiler has cooled to 120°F or less refill  

boiler to normal water line. If water in gauge glass  

does not appear to be clear, repeat steps A thru 

E, boiling out the boiler for a longer time. 

G. Remove temporary piping, plug tapping and/or    

reinstall safety valve. Boil to bring water    

temperature to 180ºF promptly in order to drive 

off any dissolved gases in the fresh water.