U.S. Boiler Company Alpine ALP500C, Installation, Operating And Service Instructions

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96
X. Operation
F. Changing Adjustable Parameters (continued)
Parameter Selections:
System Pump= “Central Heat ,
Optional Priority”
Boiler Pump = “any demand”
DHW Pump = “Primary Loop Piped IWH”
DHW Priority Enable is optional
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):
Single boiler Primary Piped Indirect Water Heater, Optional DHW Priority.
Single boiler with no Indirect Water Heater
Explanation:
This piping arrangement only
services central heat. When there is
any demand both boiler and system
pumps turn on.
Parameter Selections:
System Pump= “any demand”
Boiler Pump = “any demand”
DHW Pump = “never”