Boiler-Bypass Piping Zoning With Circulators; Boiler-Bypass Piping Zoning With Zone Valves - Weil-McLain Gold CGa Installation And Maintenance Instructions Manual

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
3d
Piping — low temperature systems
Figure 15
1
Boiler isolation (balancing) valves
2
Flow/check valve
3
System or zone circulator
4
System temperature gauges
5
Zone valve
6
Drain valve
7
System temperature valves (see instructions
to the left for adjusting valves)
8
Blend temperature gauge
9
Relief valve
Part Number 550-101-009/0107
Boiler-bypass piping
Zoning with circulators
(Alternative to primary/secondary piping
Figures 13 and 14)
Figure 16
Boiler-bypass piping
Zoning with zone valves
(Alternative to primary/secondary piping
Figures 13 and 14)
10
Automatic air vent (with diaphragm-type expansion
tank), or connect to tank fitting (closed-type expan-
DO NOT
sion tank). 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.
11
Fill valve
12
Diaphragm-type or bladder-type expansion tank, if
used (For closed-type expansion tank, pipe from top
of air separator to tank fitting as in
13
Air separator and automatic vent, if used (Note that the
fill valve must always be connected to the expansion
tank, regardless of location of expansion tank, circulator
or air separator.)
(continued)
Figure 10.
)
3