Weil-McLain GOLD CGa Manual page 22

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
3d
Piping — low temperature systems
BOILER-bypass piping
method
This piping method (
a
bypassed around the boiler (through valve
method reduces the flow rate throughout the boiler, in
order to raise the average water temperature in the boiler
— provided the flow rates are adjusted according to the
instructions following.
for
systems) or
primary/secondary piping can't be applied. (
page 25, is another alternative, using system bypass in
place of boiler-bypass piping.
not suitable for radiant heating applications because it
does not protect the radiant system from possible high
water temperature.)
possible and temperature drop as low as possible, help-
ing to equalize the building heat distribution.
Temperature gauges
justed using cold (or room temperature) return water
22
or , page 23) is called
because part of the circulator flow is
and are alternative piping suggestions
(large water content or steam
— for use when
is optional if the bypass valves will be ad-
Failure to
the boiler sections or burners, resulting in severe personal injury, death or substantial
property damage.
Radiant heating system piping should include a means of
in this manual provided the
apply the methods of this manual if the system is equipped with an
DO NOT
Instead,
Failure to
damage to the sections or burners, resulting in possible severe personal injury, death or
substantial property damage.
to the boiler. (When setting the valves without gauge
installed — using cold or room temperature water
— assume the return water temperature to be 60°F. Set
the valves so gauge reads at least 120°F.
is optional on converted gravity systems,
). This
but
the water temperature being supplied to the radiant
tubing.
is
adjustment of the bypass valves. The boiler-mounted
temperature/pressure gauge can be used if a separate
temperature gauge is not installed.
Valve adjustment
, 1. Start with valve
however, is
until the temperature at gauge reads 60 °F higher
than gauge
through the boiler assures a low enough flow rate
and high enough average temperature to prevent
condensation even with low system return water
temperature.
regulates the boiler flow rate.
4. The boiler-mounted temperature/pressure gauge
may be used in place of a separate gauge
and the
).
at regardless of system supply temperature.
(continued)
on radiant heating systems — to display
on all systems to assure reliable
fully closed and
while closing valve
. A minimum 60°F temperature rise
regulates the system flow rate, while valve
to the boiler could cause corrosion of
(such as provided by an
is
which can
to the boiler could cause corrosion
Part Number 550-101-009/0107
fully open.
.