6
6.
Bypass piping is an option which
gives the ability to adjust the
supply boiler water temperature
to fit the system or condition of
the installation. This method of
piping is not typically required for
baseboard heating systems.
A. This method is used
to protect boilers from
condensate forming due to
low temperature return water.
Generally noticed in large
converted gravity systems
or other large water volume
systems. See
Figure 3.
B. These methods are used to
protect systems using radiant
panels and the material they
are encased in from high
temperature supply water
from the boiler and protect the
boiler from condensation. See
Figures 4 & 5.
7.
NOTE:
When using bypass piping,
adjust valves A and B, in
Figures
3 & 5
, until desired system
temperature is obtained.
8.
NOTE:
When using a 4-way
mixing valve, set control knob until
desired temperatures are met. See
instruction supplied with valve.
9.
Bypass loop piping must be the
same size piping as the supply and
the return.
10.
Typical installation using circulators
is shown in
Figure 6
on following
page.
11.
Typical installation using zone
valves is shown in
Figure 7 on
following page.
12.
For further piping information
refer to the I=B=R installation and
piping guide.
ZONE
CIR.
VALVE
FLOW
VALVE
EXPANSION
TANK
VALVE
SYSTEM
TEMPERATURE
GAUGE
RETURN
SUPPLY
"A"
"B"
WATER
FEED
ZONE
CIR.
EXPANSION
TANK
SYSTEM
TEMPERATURE
GAUGE
RETURN
SUPPLY
4 WAY MIXING
VALVE
WATER
FEED
Figure 3 - Bypass Piping
Figure 3 - Mixing Valve Piping
CONNECTING SUPPLY AND RETURN PIPING
