Chapter 3 — Waterside Care and Requirements
Part No. 750-184
3-15
Be sure the blow-off piping and tank, if used, are in proper operating
condition. Discharge vents should be clear of obstruction, and the
waste should be piped to a point of safe discharge.
Most blow-off lines are provided with two valves, generally a quick
opening valve nearest the boiler and a slow opening globe type valve
downstream. Valves will vary depending upon pressure involved and
make or manufacturer. If seatless valves are installed, follow the
manufacturer’s recommendations.
If a quick opening valve and globe type of slow opening valve are in
combination, the former is normally opened first and closed last
with blow down accomplished with the globe or slow opening valve.
When opening the second or downstream valve, crack it slightly to
allow the lines to warm, then continue opening slowly.
!
Caution
Do not pump the lever action valve open and closed, as water
hammer is apt to break the valve bodies or pipe fittings. Failure to
follow these instructions could cause damage to the equipment.
The length of each blow should be determined by actual water
analysis. Lowering the water in the gauge glass approximately 1/2”
is often acceptable as a guide to adequate blow. However, lowering
the water 1/2” should not be interpreted as a rule since water
analysis procedures should prevail. If the glass cannot be viewed by
the party operating the valve, another operator should watch the
glass and direct the valve operator.
Close the downstream (slow opening) valve first and as fast as
possible. Then close the valve next to the boiler. Slightly crack the
downstream valve and then close it tightly.
Under no circumstances should a blow-off valve be left open and
the operator should never leave until the blowdown operation is
completed and the valves are closed.
H. PERIODIC INSPECTION
Insurance regulations or local laws will require a periodic inspection
of the pressure vessel by an authorized inspector. Sufficient notice
is generally given to permit removal of the boiler from service and
preparation for inspection.
!
Warning
To avoid the hazard of electrical shock, use a low voltage flashlight
during an internal inspection. Preferably, inspectors should work in
pairs. Failure to follow these instructions could result in serious
personal injury or death.
When shutting down the boiler, the load should be reduced
gradually and the pressure vessel cooled at a rate that avoids
damaging temperature differential that can cause harmful stresses.
Vessels should not normally be drained until all pressure is relieved
Summary of Contents for CB Ohio Special 100 HP
Page 2: ...ii ...
Page 8: ...viii ...
Page 42: ...Chapter 2 Burner Operation and Control 2 22 Part No 750 184 ...
Page 116: ...Chapter 6 Adjustment Procedures 6 28 Part No 750 184 ...
Page 126: ...Chapter 8 Inspection and Maintenance 8 6 Part No 750 184 ...
Page 153: ...Chapter 9 Parts Part No 750 184 9 3 Insulated Front Head Model CB LE ...
Page 154: ...Chapter 9 Parts 9 4 Part No 750 184 Insulated Front Head Interior Model CB LE ...
Page 155: ...Chapter 9 Parts Part No 750 184 9 5 Insulated Inner Door Model CB OS ...
Page 156: ...Chapter 9 Parts 9 6 Part No 750 184 Insulated Rear Head CB LE ...
Page 157: ...Chapter 9 Parts Part No 750 184 9 7 Insulated Rear Head CB LE ...
Page 158: ...Chapter 9 Parts 9 8 Part No 750 184 Insulated Rear Head CB OS ...
Page 159: ...Chapter 9 Parts Part No 750 184 9 9 Dry Oven Model CB LE ...
Page 161: ...Chapter 9 Parts Part No 750 184 9 11 Motor Impeller Model CB LE ...
Page 162: ...Chapter 9 Parts 9 12 Part No 750 184 Front Head Linkage ...
Page 170: ...Chapter 9 Parts 9 20 Part No 750 184 Control Cabinet Hawk ICS ...
Page 171: ...Chapter 9 Parts Part No 750 184 9 21 Control Panel Standard ...
Page 172: ...Chapter 9 Parts 9 22 Part No 750 184 Entrance Box ...
Page 173: ...Chapter 9 Parts Part No 750 184 9 23 Front Head Electrical CB LE ...
Page 174: ...Chapter 9 Parts 9 24 Part No 750 184 Front Head Electrical CB LE ...
Page 175: ...Chapter 9 Parts Part No 750 184 9 25 Front Head Electrical CB OS ...
Page 176: ...Chapter 9 Parts 9 26 Part No 750 184 Front Head Electrical CB OS ...
Page 179: ...Chapter 9 Parts Part No 750 184 9 29 Heavy Oil Piping 60 Steam CB LE ...
Page 180: ...Chapter 9 Parts 9 30 Part No 750 184 Heavy Oil Piping 60 Steam CB LE SEE TABLE NEXT PAGE ...
Page 181: ...Chapter 9 Parts Part No 750 184 9 31 Common Oil Parts Heavy Oil ...
Page 182: ...Chapter 9 Parts 9 32 Part No 750 184 Side Mounted Air Compressor Piping ...
Page 183: ...Chapter 9 Parts Part No 750 184 9 33 Air Compressor Piping CB OS ...
Page 185: ...Chapter 9 Parts Part No 750 184 9 35 Light Oil Piping ...
Page 186: ...Chapter 9 Parts 9 36 Part No 750 184 Light Oil Air Piping Front Head ...
Page 187: ...Chapter 9 Parts Part No 750 184 9 37 Light Oil Air Piping Front Head PAGE 9 31 ...
Page 191: ...Chapter 9 Parts Part No 750 184 9 41 Gas Train 125 150 HP ...
Page 193: ...Chapter 9 Parts Part No 750 184 9 43 Gas Train 200 HP ...
Page 195: ...Chapter 9 Parts Part No 750 184 9 45 Steam Pressure Controls ...
Page 196: ...Chapter 9 Parts 9 46 Part No 750 184 Hot Water Temperature Controls ...
Page 197: ...Chapter 9 Parts Part No 750 184 9 47 Water Column ...
Page 198: ...Chapter 9 Parts 9 48 Part No 750 184 Water Column ...
Page 199: ...Chapter 9 Parts Part No 750 184 9 49 Fireside Gaskets CB LE ...
Page 200: ...Chapter 9 Parts 9 50 Part No 750 184 Fireside Gaskets CB OS ...