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B
C
B
A
Relief Valve
Drain Valve
Secondary Unions Not Required; Optional Locations Shown
Full Port Isolation Valves
Full Port Isolation
Valves
Indirect Circulator
Flow Check
From System
Y-Strainer
(Recommended)
Close Nipple
(Locate Header Sensor
As Close As Possible To Downstream Tee)
Cold Water Line
Header Temperature
Sensor
(When Used)
Backflow Preventer
Fill Valve
Air Separator
& Air Vent
Expansion Tank
Indirect Supply
Indirect Return
Indirect Domestic Water Heater (IWH)
To
System
Hydraulic Separator May Be Substituted
For Tees
At least eight pipe diameters upstream of first tee.
A.
No further apart than 12" (~30 cm) or four pipe diameters, whic
hever is smaller
B.
At least 18" (~46 cm) of straight pipe for
Conventional
Air Scoop.
C.
Boiler Circulator
Flow Check
Optional Full Port Isolation
Valve
Heating
Circulators
Optional Full Port Isolation
Valve
To
System
Heating System Circulator
System
Zone
Valves
Optional Zone Valve Controlled System
1
IX. System Piping
(continued)
Figure 9.8b: Piping Method #1 - Near Boiler Piping - Heating Plus Supply Piped Indirect W
ater Heater
HX Inlet T
op Connection; HX Outlet T
op Connection
CAUTION
:
It
is
the
installers
responsibility
to
select
boiler
piping
configurations
that
provide
the proper flow rates and performance for the
boiler and indirect water heater
.
