Crown Boiler 24-10 用户手册

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2.  FLOAT TYPE LOW WATER CUTOFF

  During the heating season, if an external low water 

cutoff is on the boiler, the blow off valve should 

be opened once a month (use greater frequency 

where conditions warrant) to flush out the sediment 

chamber so the device will be free to function 

properly.

  Low water cutoffs and water feeders should be 

dismantled annually by qualified personnel, to the 

extent necessary to insure freedom from obstructions 

and proper functioning of the working parts.  Inspect 

connecting lines to boiler for accumulation of 

mud, scale, etc., and clean as required.  Examine 

all visible wiring for brittle or worn insulation and 

make sure electrical contacts are clean and that they 

function properly.  Give special attention to solder 

joints on bellows and float when this type of control 

is used.  Check float for evidence of collapse and 

check mercury bulb (where applicable) for mercury 

separation or discoloration.  DO NOT ATTEMPT 

TO REPAIR MECHANISMS IN THE FIELD.  

Complete replacement mechanisms, including 

necessary gaskets and installation instructions, are 

available from the manufacturer.

  CHECK BURNER AND CONTROLS at least once 

a year.  See Section IV - Operating Instructions, Step J 

for control checks.  See Burner Manual for burner tests 

and adjustments.

  LUBRICATE BOILER COMPONENTS according 

to manufacturer’s instructions.  Generally, this involves 

the oil burner and circulator.  This includes the type of 

lubricant to use, frequency of lubrication, and points to 

lubricate.

  GENERAL MAINTENANCE CONSIDERATIONS

1.  Keep radiators and convectors clean.
2.  If a hot water radiator is hot at the bottom but not at 

the top, it indicates that air has accumulated inside 

and should be vented.  To vent radiator, hold small 

cup under air vent (located near top of radiator), 

open vent until water escapes and then close.

3.  If much water is added to system, it is advisable to 

heat system to a high temperature and vent again.  

This will make less venting necessary during the 

winter.

4.  Where an expansion tank is used, make sure that 

neither the tank nor its drain pipe is exposed to 

freezing temperatures.  Never place valves in piping 

leading to or from expansion tank.

5.  Boiler and system cleaning will help assure 

trouble free operation.  See Section IV - Operating 

Instructions, Steps K or L for procedure.

G.

  ATTENTION TO BOILER WHILE NOT IN 

1.  Spray inside surfaces with light lubricating or 

crankcase oil using gun with extended stem so as to 

reach all corners.

2.  With steam boilers, at end of season add sufficient 

water to fill boiler to top of water column and leave 

it that way until fall when water should be drained 

again to proper level.  If at this time boiler water is 

dirty, drain water, flush out boiler, and refill with 

clean water to prescribed water level.

3.  Always keep the manual fuel supply valve shut off 

when the burner is shut down for an extended period 

of time.

4.  To recondition the heating system in the fall season 

after a prolonged shut down, follow the instructions 

outlined in Section  IV - Operating Instructions, 

Steps B through L.