Page 20
SUPPLY
RETURN
SUPPLY
RETURN
CASCADE SYSTEM
SENSOR
SUPPLY
RETURN
LOW LOSS
HEADER
MAKE U
P
WATER
Leader
Follower
Follower
NOTE: These drawings are meant to show system piping concept only. Installer
is responsible for all equipment and detailing required by local codes.
NOTE: The cascading communications cable is 60" long. This must be considered
during installation as this leaves only about 12" between adjascent units.
Cascade FT Wall-Mounted, Heating Only Boilers Piping Diagrams (continued)
Mixing Valve
Zone Valve
Actuators
Circulation pump
Pressure relief valve
Air separator
Expansion tank
(Diaphragm type)
Isolation valve
Check valve
2-way valve
Indirect DHW Tank
Air Separator
Pressure Reducing
Valve
Purge
Cascade System
Sensor
Tee
Make Up Water
Figure 20. Three FT wall-mounted heating only models, cascaded and with low loss header.
