Installation and Operation Manual
TFTN 085-199
56
Figure 11-1(b) Cascade Plumbing Schematic
–
CH Zone Valves (DHW Pump)
NOTES:
1.
For ZONE 1, ZONE 2 & ZONE 3 to output 24VAC (like in this example), jumper ZONE INPUT to R (24V).
2.
Pumps responsible for circulating water through the boiler must be sized accordingly (see Tables 10-2 & 10-3).
3.
System Sensor
–
mandatory in cascade configurations; must be installed downstream of the LL-header. Connect to
AUX1 NTC
at Manager boiler and set
option Auxiliary Sensor 1 (24.6.1) = System Sensor.
4.
Downstream IWH
–
connect the Tank Sensor (or Aquastat) and DHW Pump to the Manager boiler and set
option DHW Mode (Cascade) = Downstream IWH (Tank Sensor or Aquastat).
5.
Upstream IWH
–
connect the Tank Sensor (or Aquastat) and DHW Pump to the boiler it is piped to and set the respective
boiler’s
option DHW Mode = Upstream IWH (Tank Sensor or Aquastat).
NOTE
: an Upstream IWH cannot be connected (piped/wired) to a Manager boiler if there is a Downstream IWH.
6.
System Pump
–
connect to the
AUX2 PUMP
output at the Manager boiler.
2
FUTURE
1
1
2
2
3
4
5
6
FUTURE
