Thermal Solutions APEX APX425C - 10 Operation (continued); DHW Modulation Sensor and Outdoor Reset Curve

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APEX Installation, Operating, & Service Instructions
9. Domestic Hot Water Parameters, continued
Parameter and Description Factory Setting Range / Choices
DHW Modulation Sensor
Outlet Sensor: Boiler modulates for DHW demand in response to supply/outlet
sensor in boiler.
DHW Sensor: Boiler modulates for DHW demand in response to DHW sensor at
boiler-side inlet to indirect water heater. Use for single boiler
servicing indirect water heater.
Outlet Sensor
Outlet Sensor,
DHW Sensor
Figure 10-21: Outdoor Reset Curve
10 Operation (continued)