Piping For Systems Requiring Temperatures Below 140°F - Weil-McLain WGO 4 Series Manual

WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —
Connect water piping
Piping for systems requiring
temperatures below 140°F
In most systems, this type of piping is not required. If
system water temperature requirements are less than
140°F, such as radiant panels or converted gravity sys-
tems, use piping as shown in Figure 15 or Figure 16. If
system piping is plastic without an oxygen barrier, a
heat exchanger must be used.
Legend
1
Isolation valve
2
Flow control valve
3
Circulator
4
System temperature
gauge
5
Zone valve
6
Drain valve
Part number 550-142-331/0421
SERVICE TECHNICIAN ONLY — read and follow completely.
(continued)
7
System temperature
valves
Adjust valves so that:
- the temperature at
gauge 8 is at least 140°F
- the temperature at
gauge 9 is at least 160°F
8
Blend temperature
gauge
9
Boiler temperature
gauge
Boiler Manual
Figure 15
Piping with CIRCULATORS
Figure 16
Piping with ZONE VALVES
21