Piping Diagrams - Lochinvar FTxl 400 Installation & Operation Manual

6
Hydronic piping
Figure 6-5 Multiple Boilers - Alternate - Fixed or Variable Flow Primary System Piping
Mixing valves are required for the protection of low temperature loops.
CAUTION
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
NOTICE
for all equipment and detailing required by local codes.
42
Model 2 3
Manifold Pipe Sizes in Inches (mm)
400 3 1/2 (89) 4 (102)
3 1/2 (89) 4 (102)
500
3 1/2 (89) 4 (102)
600
4 (102) 5 (127)
725
4 (102) 5 (127)
850
Installation & Operation Manual
Number of Units
4 5 6
5 (127) 6 (152) 6 (152) 8 (203) 10 (254)
5 (127) 6 (152) 6 (152) 8 (203) 10 (254)
5 (127) 6 (152) 6 (152) 8 (203) 10 (254)
6 (152) 8 (203) 8 (203) 8 (203) 10 (254)
6 (152) 8 (203) 8 (203) 8 (203) 10 (254)
7 8