Freestyle 2 Series - Page 47

Figure 58 Piping schematic — typical piping for multiple FreeStyle
®
Heating Only boilers
Part number 550-142-950/0122
47
FreeStyle
®
series 2 wall mount gas-fired water boiler – boiler manual
19 Multiple boiler installations (continued)
Legend for Figure 58
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 backow preventer, as required by appli-
cable codes.
10 Cold water supply
11 Supply water temperature control (when used).
12 Low water cuto (when used) (place above primary
header).
13 Water ow switch (when used).
14 Boiler circulators
15 System supply
16 System return
17 Boiler P/T gauge (eld supplied), relief valve and discharge
piping, installed per this boiler manual.
18 Purge/drain valve