Delta F-25 Electric Heater User Manual


 
21
Primary Piping
1
12" max.
2
2
3
6
2
3
6
2
3
2
3
2
2
2
5
L
O
A
D
L
O
A
D
1
2
2
2
2
2
5
2
4
6
4
12" max.
L
O
A
D
L
O
A
D
Fig. 8: Primary piping - Zoning with Circulators
Fig. 9: 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 20 for near appliance piping.
Install balancing valves to
adjust flow to distribute
heat to all zones
Size primary manifold for
total flow of all circulators
Size each circulator to indi-
vidual circuit requirements
Install balancing valves to
adjust flow to distribute
heat to all zones