Weil-McLain GOLD CGa Installation And Maintenance Manual page 21

Boiler Manual
Primary/secondary (preferred) piping —
for radiant heating or converted gravity systems
Figure 13
Zoning with circulators
ZONE 2
ZONE 1
1
4a
12"
2
MAX.
1
6
7a
8
9
11
Cold
water
fill
12
59310
Boiler isolation (balancing) valves
1
2 Flow/check valve
System or zone circulator (circulator should cycle
3
with zone valve and switches, using circulator valve
or zone control panel)
System temperature gauges
4
Zone valve
5
Drain valve
6
System temperature valves (see instructions to the
7
left for adjusting valves)
Blend temperature gauge
8
Relief valve
9
Part Number 550-110-593/1099
Figure 14
Zoning with zone valves
1
2
4b
3
1
13
6
7b
Alternate
circulator
location
10
GOLD
CGa
59311
10
11
12
13
ZONE 2
ZONE 1
1
4a
12"
MAX.
1
7b
6
7a
8
9 10
11
Cold
water
fill
12
Automatic air vent (with diaphragm-type expansion
tank), or connect to tank fitting (closed-type expansion
tank). use an automatic air vent when using
DO NOT
closed-type expansion tank. It would allow air to leave
the system, causing waterlogging of the expansion tank.
Fill valve
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
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.)
1
4b
5
3
13
1
6
Alternate
circulator
location
GOLD
CGa
)
Figure 10.
21