Weil-McLain GOLD CGa Manual page 24

GOLD CGa Gas-Fired Water Boiler — Boiler Manual
3d
Piping — low temperature systems
SYSTEM-bypass piping
method
This piping method (
the system (through valve
from the boiler outlet mixes with cooler system return
water temperature in order to provide minimum 130°F
full open, but may need to be slightly closed on some
low pressure drop systems in order to cause enough
flow through valve
return water temperature control for boilers installed
on
or steam systems).
ing the water temperature provided to the system and
could result in excessive water temperature in the radi-
ant tubing.
System-bypass piping as shown in
with either zone valve or circulator zoning. When used
with circulator zoning however, the boiler circulator
(item ), must be piped as shown. It cannot be used as
one of the zoning circulators.
24
, page 25) is called a
because part of the circulator flow bypasses
). This bypassed hot water
will most often be
.
is an alternative piping method that provides
(large water content
apply the piping of
. It provides no method of regulat-
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.
apply system-bypass piping if the reduced
flow in the system could cause poor heat distribution.
That is, system-bypass piping reduces the flow in the
system and increases the water temperature supplied to
the system. This can cause increased heat from radiators
at the beginning of the system and reduced heat from
radiators near the end of the system.
Valve adjustment
1. Start with valve
the temperature at gauge reads at least 130°F at all
times.
on
drop in the system needed to balance flow through
valve
can be used
4. The valve adjustment should be done with the
system at the coldest expected temperature (60°F
for converted gravity systems or high mass radiant
systems).
and the
).
at regardless of system supply temperature.
(continued)
fully closed and
while closing valve
regulates the amount of boiler supply water
causes a pressure
and the system.
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.
until