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Primary Piping
Fig. 12: Primary piping - Zoning with Circulators
Fig. 13: Primary Piping - Zoning with Zone Valves
1. Appliance circulator
2. Shut-off valves
3. Flow check valve
4. Zone valve
5. System purge valve
6. System circulator
Note: See page 23 for near appliance piping.
• Install balancing valves to
adjust flow to distribute
heat to all zones
• Size primary manifold for
total flow of all circula-
tors
• Size each circulator to
individual circuit require-
ments
• Install balancing valves to
adjust flow to distribute
heat to all zones