15
Piping Legend
FIGURE 5-4 System Piping
NOTICE
Illustrations are meant to show system piping
concept only. Installer responsible for all
equipment and detailing required by authority
having jurisdiction.
System
Return
System
Supply
Safety Relief Valve
WALL
MOUNTED
ONLY
Pipe to
condensate
drain
Table 3 - System Piping Confi gurations
Single Boiler
Two Pipe Zoned System
With Zone Valves fi gure 5-5
With Zone Pumps fi gure 5-6
Primary/Secondary Pumping
Closed External Primary Loop
fi gure 5-7A
Open External Primary Loop fi gure 5-7B
Multiple Boilers
Two Pipe Zoned System
With Zone Valves fi gure 5-8A
With Zone Pumps Not Shown
Primary/Secondary Pumping
Closed External Primary Loop fi gure 5-8B
Open External Primary Loop
fi gure 5-8C
5 - HYDRONIC PIPING
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