Crestron electronic Crest Condensing Boiler 3.5 - Manual (Page 27)

27
Installation & Operation Manual
5
Hydronic piping
(continued)
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
Figure 5-2 Single Boiler - Recommended - Primary / Secondary Piping with a Hot Water Generator
HOT WATER
GENERATOR
WATER
GENERATOR
CIRCULATOR
BOILER PUMP
FLOW CHECK
VALVE (TYPICAL)
Y-STRAINER
(RECOMMENDED)
RELIEF
VALVE
BALL VALVE
(TYPICAL)
AIR SEPERATOR
DRAIN PORT
(TYPICAL)
SYSTEM
CIRCULATOR
BACK FLOW
PREVENTER
PRESSURE
REDUCING VALVE
PRESSURE
GAUGE EXPANSION
TANK
12"
MAX
FROM SYSTEM
TO SYSTEM
MAKE UP
WATER
BOILER
DRAIN
SYSTEM RETURN
SENSOR
SYSTEM SUPPLY
SENSOR
System flow should always remain higher than the required flow for the boiler(s) when the boiler(s) is in
operation to prevent short cycling and high limit issues.
NOTICE