Burnham K50 Boiler User Manual


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SECTION IV - OPERATION
Safe lighting and other performance criteria were met with the gas manifold and control assembly provided on the boiler
whentheboilerunderwenttestsspeciedinANSIZ21.13.
1. GENERAL
a. INITIAL FILL – Before putting water into a new
boiler,makecertainthattheringequipmentisin
operatingconditiontotheextentthatthisispossible,
withoutactuallyringintoanemptyboiler.This
is necessary because raw water must be boiled
[orheatedtoatleast180ºF]promptlyafteritis
introduced into the boiler in order to drive off the
dissolved gases which might otherwise corrode the
boiler.
b. PURGE GAS PIPING OF AIR – Check Manual
Shut Off Valve(s) and Pilot Shut Off Valve(s) at
boiler to see that they are closed. Turn gas on
at meter. Disconnect Pilot Tubing at Pilot Shut
OffValve(s),openPilotValve(s)untilgasows
from valve(s) KEEPING A CONSTANT CHECK
DURING THE PURGING. Close pilot valve(s)
and reconnect the pilot tubing. (In Canada, refer
to applicable Installation Codes for purging
procedure.)
c. SINCE LIGHTING INSTRUCTIONS,
SHUTDOWN INSTRUCTIONS, AND CONTROL
SEQUENCE OF OPERATION VARY WITH
GAS CONTROL SYSTEM INSTALLED,
REFERENCE SHOULD NEXT BE MADE TO
THE APPLICABLE CONTROL SYSTEM:
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 returned to the
boiler, boil out the boiler using the surface blowoff
connection. See Fig. 7.
a.
Drain boiler until water is just visible in gauge
glass. Run temporary 1½” pipe line from the
surface blowoff connection to an open drain or
some other location where hot water may be
discharged safely. Do not install valve in this
line.
b. Add an appropriate amount of recommended boil
out compound.
c.Startburnerandoperatesufcientlytoboil
the water without producing steam pressure.
Boil for about 5 hours. Open boiler feed pipe
sufcientlytopermitasteadytrickleofwater
from the surface blowoff pipe. Continue this
slowboilingandtrickleofoverowforseveral
hoursuntilthewatercomingfromtheoverow
is clear.
d. Stop burner and drain boiler in a manner and to
a location that hot water can be discharged with
safety.
e.Rellboilertonormalwaterline.Ifwaterin
gauge glass does not appear to be clear, repeat
steps (a. through c.) and boil out the boiler for a
longer time.
2. Low pressure steam boilers such as the 5B series
should be maintained with appropriate water
treatment compounds. Add suitable water treatment
compoundsasrecommendedbyyourqualiedwater
treatment company.
3. Remove temporary surface blowoff piping, plug
tapping and reinstall safety valve. Boil or bring
watertemperatureto180ºFpromptlyinorderto
drive off the dissolved gases in the fresh water.
4. If unsteady water line, foaming or priming persist,
install gate valve in Hartford Loop and drain valves
in return main and at boiler and proceed as follows:
a.Connecthosesfromdrainvalvestooordrain.
Close gate valve in Hartford Loop and open
drain valve in return main. Fill boiler to normal
water level, turn on 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.
EIControlSystem-Page46
EO Control System - Page 52
EE Control System - Page 54
EOP
ControlSystem-Page61
EEPControlSystem-Page65
THERMControlSystem-Page68
Check all electrical circuits and connections. Then
follow lighting instructions up to a point where the
boiler is ready to light.
2. BOILER AND SYSTEM CLEANING
INSTRUCTIONS FOR TROUBLE FREE
OPERATION
Aqualiedwatertreatmentchemicalspecialist
should be consulted for recommendations regarding
appropriate chemical compounds and concentrations
which are compatible with local environmental
regulations.
A. Steam Boilers
1. Oil, greases & sediments which accumulate in a
new boiler and piping must be removed in order
to prevent an unsteady water line and carry over
of the water into the supply main above boiler.
Operate the boiler with steam in the entire system
for a few days allowing the condensate to return
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