Weil-McLain CGA25SPDN manual 3d Piping - low temperature systems continued, ONE VALVE 6$RAINAVALVE

GOLD CGa Gas-Fired Water Boiler — Boiler Manual

3d Piping — low temperature systems (continued)

1"OILER ISOLATION BALANCING VALVES

2Flow/check valve

3System or zone circulator (circulator should cycle with zone valve and switches, using circulator valve or zone control panel)

4System temperature gauges

5:ONE VALVE

6$RAINAVALVE

7System temperature valves (see instructions to the left for adjusting valves)

8"LENDETEMPERATUREMGAUGE

9Relief valve

10Automatic air vent (with diaphragm-type expansion tank), or connect to tank fitting (closed-type expan- sion tank). DO NOT use an automatic air vent when using closed-type expansion tank. It would allow air to leave the system, causing waterlogging of the expansion tank.

11Fill valve

12$IAPHRAGMTYPE OR BLADDERTYPE EXPANSIONN TANK if used (For closed-type expansion tank, pipe from top of air separator to tank fitting as in &IGURE , page 17.)

13!IRISEPARATORPANDRAUTOMATIC VENTNIF USEDI.OTEUTHAT the fill valve must always be connected to the expan- sion tank, regardless of location of expansion tank, circulator or air separator.)

Part Number 550-101-009/0107 21