62 Installing a Cascade System
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System Application #1- Cascade System with Closely Spaced Tees
12” (30 cm)
maximum
Air separator
Sub2Sub1
Main
Temperature
sensors (required)
Cold water
Supply
Return
Back flow preventor
Expansion tank
Note
●
Connect the “SH Demand (SH T/T or Zone controller)” to the main unit.
●
Connect the supply/return sensors to SUPPLY and RETURN terminals of the CNT1/2 terminal strip on the main unit PCB.
●
Connect the outdoor sensor (optional) to the main unit.
●
Install system pumps to the units (main and sub) as required by the system configuration.
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System Application #2- Cascade System with Hydro Separator
Sub2
Sub1
Main
Cold water
Supply
Return
Dirt collector
Hydro/Air separator
Back flow preventor
Expansion tank
Temperature
sensors (required)
Note
●
Connect the “SH Demand (SH T/T or Zone controller)” to the main unit.
●
Connect the supply/return sensors to SUPPLY and RETURN terminals of the CNT1 terminal strip on the main unit PCB.
●
Connect the outdoor sensor (optional) to the main unit.
●
Install system pumps to the units (main and sub) as required by the system configuration.
●
Connect zone pumps to the main unit, or to the zone controller.
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