Hydronic piping, Installation & operation manual – Lochinvar KBII-I-O REV C 81 - 286 User Manual
Page 45
45
Installation & Operation Manual
6
Hydronic piping
(continued)
BOILER 1
(LEADER)
INDIRECT
DHW TANK
DOMESTIC
HOT WATER
CIRCULATOR
BACKFLOW
PREVENTER
PRESSURE
REDUCING VALVE
PRESSURE
GAUGE
ANTI-SCALD
MIXING VALVE
COLD WATER
IN
TEMPERATURE /
PRESSURE
GAUGE
AIR SEPARATOR
EXPANSION
TANK
BALL VALVE
(TYPICAL)
UNION
(TYPICAL)
DRAIN POINT
(TYPICAL)
MAKE UP WATER
FROM
SYSTEM
TO
SYSTEM
BOILER 2
(MEMBER 1)
BOILER
CIRCULATOR
BOILER 3
(MEMBER 2)
BOILER 4
(MEMBER 3)
SYSTEM SUPPLY
SENSOR
DRAIN
SYSTEM
CIRCULATOR
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
Y-STRAINER
(RECOMMENDED)
(TYPICAL)
MAY SUBSTITUTE LOW LOSS HEADER
HOT
WATER
OUT
FLOW CHECK
VALVE
Figure 6-10 Multiple Boilers - Non-Zoned Primary/Secondary Piping
Model
Number of Units
2
3
4
5
6
7
8
Required Pipe Sizes
81
1-1/4" 1-1/2"
2"
2"
2-1/2" 2-1/2" 2-1/2"
106
1-1/2"
2"
2"
2-1/2" 2-1/2" 2-1/2"
3"
151
2"
2"
2-1/2" 2-1/2"
3"
3"
3-1/2"
211
2"
2-1/2"
3"
3"
3-1/2"
4"
4"
286
2-1/2" 2-1/2"
3"
3-1/2" 3-1/2"
4"
5"
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