SAFETY PRECAUTIONS AND
ABBREVIATIONS
Safety Precautions
It is essential to read and understand the following safety
precautions before attempting to operate the equipment.
Failure to follow these precautions may result in damage to
equipment, serious personal injury, or death. A complete
understanding of this manual is required before attempting to
start-up, operate or maintain the equipment. The equipment
should be operated only by personnel who have a working
knowledge and understanding of the equipment.
The following symbols are used throughout this manual:
!
DANGER
WARNING
This symbol indicates a potentially
hazardous situation which, if not
avoided, could result in serious
personal injury, or death.
!
DANGER
CAUTION
This symbol indicates a potentially hazard-
ous situation which, if not avoided, could
result in damage to the equipment.
Note: This symbol indicates information
that is vital to the operation of this
equipment.
Abbreviations
Following is an explanation of the abbreviations, acronyms,
and symbols used in this manual.
AC Alternating Current
AR Automatic Reset
ASME American Society of Mechanical Engineers
ASTM American Society of Testing and Materials
BHP Boiler Horsepower
BTU British Thermal Unit
°C Degrees Celsius
CFH Cubic Feet per Hour
Cu Ft Cubic Feet
DC Direct Current
°F Degrees Fahrenheit
FM Factory Mutual
FS Flame Safeguard
ft Feet
GPM Gallons per Minute
Hd Head
HT Height
HTB High Turndown Burner
HZ Hertz
In H
2
O Inches of Water
IRI Industrial Risk Insurance
Lb Pound
LWCO Low-Water Cut-Off
M Million
MFD Micro-Farad
MR Manual Reset
NEC National Electric Code
No. Number
pH Measure of the degree of acid or base of a
solution
P/N Part Number
PPM Parts Per Million
PR Program Relay
psi Pounds Per Square Inch
SAE Society of Automotive Engineers
scfh Standard Cubic Feet per Hour
T Temperature
TC Temperature Control
TI Temperature Gauge
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