Crown Boiler Phantom X series, Installation And Operating Instructions Manual, Page: 97 / 136

97
X. Operation
F. Changing Adjustable Parameters (continued)
Sequencer Master
(Boiler 1)
Boiler 2
Wiring locations:
Enable/Disable X
DHW Demand X
System Pump X
DHW Pump X
Boiler Pump X X
Sequencer Master Parameter Selections:
Sequencer Master Enabled
Indirect Water
Heater
“Primary Piped”
Pump Parameter Selections:
System Pump =
Central Heat,
Optional Priority
Never
Boiler Pump = Any demand
Any
demand
DHW Pump =
Primary Loop
Piped IWH
Never
Explanation:
This piping arrangement permits the system pump to run or not run when there is a domestic hot water call for heat. Domestic
hot water priority is optional. It is permissible for the domestic and system pumps to run at the same time. The boiler pump
must run for every call for heat.
Example Pump Parameter selections (continued):
Multiple Boilers, Primary Piped Indirect Water Heater, Optional DHW Priority
Multiple Boilers, Primary Piped Indirect Water Heater, System Pump Run for Any Demand
Sequencer Master
(Boiler 1)
Boiler 2
Wiring locations:
Enable/Disable X
DHW Demand X
System Pump X
DHW Pump X
Boiler Pump X X
Sequencer Master Parameter Selections:
Sequencer Master Enabled
Indirect Water
Heater
“Primary Piped”
Pump Parameter Selections:
System Pump = Any demand Never
Boiler Pump = Any demand Any demand
DHW Pump =
Primary Loop
Piped IWH
Never
Explanation:
This piping arrangement requires the system pump to be running for any calls for heat. Also the boiler pump must run for any
call for heat.