Lochinvar CREST 3 - Manual (Page 6)

1
Service
6
Service Manual
Boiler piping
This piping reference is included to specify the Boiler Piping specific to the Crest boiler. This piping scheme is important for
proper operation of the SMART TOUCH control. See the Crest Installation and Operation Manual for more detailed piping
diagrams.
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
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
FROM SYSTEM
TO SYSTEM
MAKE UP
WATER
BOILER DRAIN
Single Boiler - Alternate - Full Flow System Piping