A. SYMBOLS, ABBREVIATIONS, AND SAFETY SYMBOLS:
ABBREVIATIONS
SYMBOLS
BTUH
BTU’s p er hour
Pump
EWT
Entering Water Temperature
Strainer
FPS
Feet per second
Flow Arrow
FPT
Female Pipe Thread
Mixing Valve
GPM
Gallons per minute
Isolation Valve
HWS/HWR Hot Water Supply/Hot Water Return
Flange
MBH
MBTU’s (1,000 BTU) per hou r
Thermometer
MMBH
MMBTU (1,000,000 BTU) per hour
Temperature Sensor
MPT
Male Pipe Thread
Check Valve
NPT
National Pipe Thread
Drain
OD
Outdoor
Connect to Existing
RWT
Return Water Temperature
A notice provides a piece of information to make a procedure easier or clearer.
A caution emphasizes where equipment damage might occur. Personal injury is not likely.
A warning emphasizes areas where personal injury or death may occur but is not likely. Property or equipment damage is likely.
A danger emphasizes areas or procedures where death, serious injury, or property damage is likely if not strictly followed
4
Hydronic System Design Manual ©DECTRA CORPORATION - March 2013
Made with FlippingBook - professional solution for displaying marketing and sales documents online