Install Instructions

43
6A Hydronic piping (continued)
Figure 6-9 Multiple Boilers - Single Temperature Zoned with Circulators_BOILER ONLY
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
BACKFLOW
PREVENTER
PRESSURE
REDUCING VALVE
AIR SEPARATOR
EXPANSION
TANK
BALL VALVE
(TYPICAL)
DRAIN POINT
(TYPICAL)
MAKE UP
WATER
ZONE CIRCULATORS
(TYPICAL)
FLOW CHECK
VALVE
(TYPICAL)
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
UNION
(TYPICAL)
BOILER 1
SYSTEM SUPPLY
SENSOR
(OPTIONAL)
Y-STRAINER
(RECOMMENDED)
(TYPICAL)
MAY SUBSTITUTE LOW LOSS HEADER
ZONE #1
ZONE #2 ZONE #3 ZONE #4
BOILER 2
TEMPERATURE /
PRESSURE GAUGE
TEMPERATURE /
PRESSURE GAUGE
INDIRECT
DHW TANK
BOILER
CIRCULATOR
COLD
WATER
IN
HC
M
ANTI-SCALD
VALVE
DOMESTIC HOT WATER
CIRCULATOR
WATER
HOT
OUT
DIR #2000537257 00
Installation & Service Manual
FIRE TUBE
™
CAUTION
Mixing valves are required for the protection of low temperature loops.
Model
Number of Units
2345678
Required Pipe Sizes
80 1 1/4" 1 1/2" 2" 2" 2 1/2" 2 1/2" 2 1/2"
110 1 1/2" 2" 2" 2 1/2" 2 1/2" 3" 3"
150 2" 2" 2 1/2" 3" 3" 3 1/2" 3 1/2"
199 2" 2 1/2" 3" 3" 3 1/2" 4" 4"