Lochinvar 000 - 500 - Manual (Page 30)

30
4
Hydronic piping
Installation & Service Manual
Primary / Secondary Piping
EXPANSION TANK
AIR SEPARATOR
PRESSURE REDUCING
VALVE
BACK FLOW
PREVENTER
BALL VALVE
(TYPICAL)
UNION (TYPICAL)
PRESSURE RELIEF
VALVE
FLOW CHECK
VALVE (TYPICAL)
BOILER
TEMPERATURE / PRESSURE
GAUGE
PRESSURE GAUGE
DRAIN
DRAIN POINT
(TYPICAL)
BOILER CIRCULATOR
SYSTEM SUPPLY SENSOR
(WHEN USED)
SYSTEM CIRCULATOR
TO
SY
STE
M
FR
OM
SY
STE
M
MAKE UP WATER
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
Y-STRAINER
(RECOMMENDED)
MAY SUBSTITUTE
LOW LOSS HEADER
FLOW SWITCH
Figure 4-4_Primary / Secondary Piping of a Single Boiler
Please note that these illustrations are meant to show system piping concept only, the installer is responsible for
all equipment and detailing required by local codes.
NOTICE