Installation & Operation Manual
5 Hydronic piping
Table 5C Multiple Boilers - Common Header - Primary / Secondary Flow
Model |
|
|
| Number of Units |
|
|
| ||
2 | 3 | 4 |
| 5 |
| 6 | 7 | 8 | |
|
| Recommended Common Header Pipe Sizes in Inches |
| ||||||
FB 1500 | 4 | 4 | 5 |
| 5 |
| 6 | 6 | 7 |
FB 2000 | 4 | 5 | 5 |
| 6 |
| 7 | 7 | 8 |
FB 2500 | 5 | 5 | 6 |
| 7 |
| 7 | 8 | 10 |
FB 3000 | 5 | 6 | 7 |
| 7 |
| 8 | 10 | 10 |
FB 3500 | 5 | 6 | 7 |
| 8 |
| 10 | 10 | 10 |
[Based on a boiler ΔT of 30°F.]
NOTICE A system supply sensor (factory supplied) MUST BE installed for proper boiler operation.
Figure 5-3 Multiple Boilers - Common Header - Recommended - Primary / Secondary Flow
HOT WATER
GENERATOR
WATER
GENERATOR
CIRCULATOR
FROM SYSTEM |
|
| SYSTEM RETURN |
| SENSOR |
| BALL VALVE |
| (TYPICAL) |
RELIEF | AIR SEPARATOR |
| |
VALVE | DRAIN PORT |
| (TYPICAL) |
| SYSTEM SUPPLY |
| SENSOR |
SYSTEM
CIRCULATOR
TO SYSTEM
MAKE UP
WATER
BACK FLOW
PREVENTER
PRESSURE
REDUCING VALVE
BOILER DRAIN | PRESSURE | |
(TYPICAL) | ||
GAUGE | ||
|
EXPANSION
TANK
BOILER PUMP |
|
|
| FLOW CHECK |
|
|
| ||
(TYPICAL) |
|
|
| VALVE (TYPICAL) |
NOTICE
NOTICE
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.
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.
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