Crown Boiler 24-07 用户手册

47

A.

  ALWAYS INSPECT INSTALLATION BEFORE 

B.

  FILL HEATING SYSTEM WITH WATER.

 

Boiler must be cleaned and fully free of oil and dirt.

 

CLEAN HEATING SYSTEM IF boiler water or 

condensate return water is dirty or if erratic water lines 

or surging exist after a few days of boiler operation.  

Refer to step (K) for proper cleaning instructions for 

steam and water boilers.
1.  STEAM BOILERS -  Fill boiler to normal water 

line.  As shown in Figure 1, the normal water line 

is 41½” from the floor or bottom of casting.  At 

the start of each heating season and once or twice 

during the season try SAFETY VALVE to be sure it 

is in working condition.  To do this, fasten wire or 

cord to lever of valve and pull lever — standing safe 

distance away from valve.

2.  HOT WATER BOILERS - Fill entire Heating 

System with water and vent air from system.  Use 

the following procedure on a Series Loop or Multi-

zoned System to remove air from system when 

filling:

a.  Close isolation valve in boiler supply piping.
b.  Isolate all circuits by closing zone valves or 

balancing valves.

c.  Attach a hose to bib cock located just below 

isolation valve in boiler supply piping.

  (Note - Terminate hose in five gallon bucket at a 

suitable floor drain or outdoor area).

d.  Starting with one circuit, open zone valve.
e.  Open bib cock.
f.  Open fill valve (Make-up water line should be 

located directly above isolation valve in boiler 

supply piping).

g.  Allow water to overflow from bucket until 

discharge from hose is bubble free for 30 

seconds.

h.  Open zone valve to the second zone to be 

purged, then close the first.  Repeat this step until 

all zones have been purged, but always have one 

zone open.  At completion, open all zone valves.

i.  Close bib cock, continue filling the system until 

the pressure gauge registers normal system 

design operating pressure.  Close fill valve.  

(Note - If make-up water line is equipped 

with pressure reducing valve, system will 

automatically fill to normal system design 

operating pressure.  Leave globe valve open.)

j.  Open isolation valve in boiler supply piping.
k.  Remove hose from bib cock.

C.

  SET CONTROLS with burner service switch turned 

“OFF”.

1.  PRESS RESET BUTTON on primary control and 

release.

2.  On STEAM BOILERS set cut-in pressure on 

L404A Pressuretrol for three (3) PSI and differential 

pressure for two (2) PSI.  These pressures may be 

varied to suit individual requirements of installation.

3.  On STEAM BOILERS WITH TANKLESS 

DOMESTIC WATER HEATERS, set boiler water 

temperature dial on low limit operating control at 

190°F (max.).  Set differential at 10°.

4.  ON WATER BOILERS WITHOUT TANKLESS 

HEATERS, set high limit dial on L4006A at 210°F.  

This temperature may be varied to suit requirements