Installation & Service Manual
4Water connections (continued)
Primary / Secondary Piping
Figure 4-6_Multiple Boilers Zoned with Circulators
|
| ZONE #1 |
PRESSURE | PRESSURE | |
REDUCING VALVE | GAUGE | |
BACKFLOW |
|
|
PREVENTER |
|
|
MAKE UP WATER | SYSTEM SUPPLY | |
|
| SENSOR |
|
| (WHEN USED) |
AIR SEPARATOR |
| |
NOT TO EXCEED 12" APART 
BALL VALVE | EXPANSION | |
(TYPICAL) | ||
TANK | ||
|
ZONE CIRCULATORS
(TYPICAL)
ZONE #2 ZONE #3 ZONE #4
DRAIN POINT | MAY SUBSTITUTE LOW LOSS HEADER |
| |
|
| HOT | |
(TYPICAL) |
|
| |
|
| WATER | |
|
|
| |
|
|
| OUT |
|
|
| |
|
|
| MIXING VALVE |
|
| FLOW CHECK | COLD |
| BOILER | VALVE | |
| WATER | ||
| CIRCULATOR |
| |
|
| IN | |
|
|
| |
| RELIEF VALVE |
| |
| (RECOMMENDED) |
| |
|
|
| |
|
|
| RECIRCULATION |
|
|
| LOOP |
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|
| AQUASTAT |
UNION |
|
|
|
(TYPICAL) |
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|
|
TEMPERATURE / |
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|
|
PRESSURE |
|
|
|
GAUGE |
|
|
|
PRESSURE | BOILER 2 | BOILER 1 | INDIRECT |
RELIEF VALVE | |||
| (LEADER 1) | (LEADER) | DHW TANK |
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