Weil-McLain WTGO - Piping for Low Temperature Systems; System Piping Below 140°F

Part number 550-141-825/1211
21
GOLD
WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 — Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
Connect water piping (continued)
Figure 13 Piping with CIRCULATORS
Figure 14 Piping with ZONE VALVES
Legend
1 Isolation valve
2 Flow control valve
3 Circulator
4 System temperature
gauge
5 Zone valve
6 Drain valve
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
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 13 or Figure 14. If
system piping is plastic without an oxygen barrier, a
heat exchanger must be used.