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 specified in ANSI Z21.13.
1.GENERAL
a.INITIAL FILL – Before putting water into a new boiler, make certain that the firing equipment is in operating condition to the extent that this is possible, without actually firing 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 flows 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:
EI Control System - Page 46
EO Control System - Page 52
EEControl 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 qualified 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
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 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.
d.Stop burner and drain boiler in a manner and to a location that hot water can be discharged with safety.
e.Refill 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 qualified 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 floor 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.
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