Weil-McLain WTGO Series Manual page 17

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 systems, use piping as shown in FIGURE 12 or
13. If system piping is plastic without an oxygen barrier, a heat exchanger must be used.
Piping with CIRCULATORS
FIGURE 12
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
CONTINUED
Piping with ZONE VALVES
FIGURE 13
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