Hydronic piping, Installation & operation manual – Lochinvar 80 - 285 User Manual
Page 41
Installation & Operation Manual
41
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)
PRESSURE
RELIEF VALVE
DRAIN POINT
(TYPICAL)
MAKE UP WATER
FROM
SYSTEM
BOILER
CIRCULATOR
TO
SYSTEM
BOILER 2
(MEMBER 1)
BOILER
CIRCULATOR
BOILER
CIRCULATOR
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
DIRT SEPARATOR
(RECOMMENDED)
(TYPICAL)
MAY SUBSTITUTE LOW LOSS HEADER
HOT
WATER
OUT
Figure 6-9 Multiple Boilers - Non-Zoned Primary/Secondary Piping
Model
Number of Units
2
3
4
5
6
7
8
Required Pipe Sizes
80
1-1/4" 1-1/2"
2"
2"
2-1/2" 2-1/2" 2-1/2"
105
1-1/2"
2"
2"
2-1/2" 2-1/2" 2-1/2"
3"
150
2"
2"
2-1/2" 2-1/2"
3"
3"
3-1/2"
210
2"
2-1/2"
3"
3"
3-1/2"
4"
4"
285
2-1/2" 2-1/2"
3"
3-1/2" 3-1/2"
4"
5"