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Rev 2.1
If outdoor reset feature is enabled and the sensor is functioning properly, then the current outdoor temperature is used to
determine the setpoint by interpolation. This lookup function uses two X and Y points to determine a line on the graph as
shown in below.
The Y coordinate of the top-left point depends on the time-of-day input
If it is off then the CH setpoint is used.
If it is on the CH TOD setpoint provides the Y coordinate and the lower-right point is also re-calculated to shift the graph in
a parallel way, as shown.
For outdoor temperatures lower than the minimum, the water temperature provided by the appropriate setpoint is used.
For outdoor temperatures higher than the maximum, the minimum water temperature is used. For outdoor temperatures
between the minimum and maximum, a linear interpolation is used to find the setpoint.
Figure 5.2 – Outdoor Reset Graph
5-2.5 To Change Low Water Temperature
Configure Outdoor Reset Configuration Central Heat Low Water Temperature Textbox (Default: 40ͼF)
x Type in desired temperature between 32ͼF and 240ͼF (0ͼC and 115ͼC)
5-2.6 To Change Maximum Off Point
Configure Outdoor Reset Configuration Central Heat Maximum Off Point Textbox
(Default: 90ͼF)
x Type in desired temperature between 32ͼF and 240ͼF (0ͼC and 115ͼC)
5-3 Domestic Hot Water Related Configuration
5-3.1 To Enable Or Disable DHW Loop
Configure DHW – Domestic Hot Water Configuration DHW Enable Textbox (CH Mode Default: Disabled,
Remote Mode Default: Disabled, DHW Mode Default: Enabled, Com Mode Default: Enabled)
x Select Enable to enable DHW loop
x Select Disable to disable DHW loop
This parameter determines whether the DHW loop is enabled or disabled. When disabled the demand caused by the
DHW sensor is ignored. It may be disabled to turn it off temporarily or because the application does not use this
feature.
5-3.2 To Change DHW Loop Demand Switch
Configure DHW – Domestic Hot Water Configuration Demand Switch Textbox
(DHW Mode Default: STAT terminal, Com Mode Default: DHW (S6) switch)
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