Freestyle 2 Series Manual page 47

FreeStyle
®
2
series
19 Multiple boiler installations
Figure 58
Piping schematic — typical piping for multiple
1 Flow/check valve
2 Isolation valves (when used)
3 Cap
4 Primary circulator
5 Expansion tank (diaphragm type)
6 System air eliminator
7 System automatic air vent
8 Pressure reducing valve
9 Check valve or backflow preventer, as required by appli-
cable codes.
Part number 550-142-950/0122
-
wall mount gas fired water boiler
Legend for Figure 58
–
boiler manual
(continued)
FreeStyle ®
Heating Only boilers
10 Cold water supply
11 Supply water temperature control (when used).
12 Low water cutoff (when used) (place above primary
header).
13 Water flow switch (when used).
14 Boiler circulators
15 System supply
16 System return
17 Boiler P/T gauge (field supplied), relief valve and discharge
piping, installed per this boiler manual.
18 Purge/drain valve
47