Delta Performance PG-25 Installation And Maintenance Manual page 31

Primary Piping
2
1
2
Fig. 12: Primary piping - Zoning with Circulators
1
2
Fig. 13: Primary Piping - Zoning with Zone Valves
1. Appliance circulator
2. Shut-off valves
3. Flow check valve
4. Zone valve
2
12" max.
2
5
6
2
4
12" max.
5
6
6
3
3
2
2
•
L L
O O
A A
D D
•
2 2
•
4
2 2 •
L L
O O
A A
D D
2
2
5. System purge valve
6. System circulator
Note: See page 23 for near appliance piping.
24
Size primary piping 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
Install balancing valves to
adjust flow to distribute
heat to all zones