Burnham ALPINE Installation, Operation And Service Instructions page 106

Xii. Operation (continued)
E.
Adjusting Parameters
Central
Heat
"Press" button to access the following parameters:
Factory Range /
Setting Choices
180°F 80°F to 190°F
170°F 80°F to 190°F
2°F 2°F to 10°F
10°F 2°F to 30°F
DHW
"Press" button to access the following parameters:
Factory Range /
Setting Choices
180°F 80°F to 190°F
170°F 80°F to 190°F
2°F 2°F to 10°F
10°F 2°F to 30°F
Enable
Enable
Disable
106
(continued)
Central Heat Setpoint
Target temperature for the central heat priority. Value also used by the outdoor air reset function.
Central Heat Thermostat "Sleep" or "away" Setback Setpoint
Thermostat setback setpoint is used when the EnviraCOM thermostat is in "leave" or "sleep" modes and sensed at
E-COM terminals D, R, and C. When setback is "on" the thermostat setback setpoint shifts the reset curve to save
energy while home is in a reduced room temperature mode. The reset curve is shifted by the difference between
the High Boiler Water Temperature and the Thermostat Setback Setpoint. Honeywell VisionPro IAQ part number
TH9421c1004 is a "setback" EnviraCOM enabled thermostat. When connected, it allows boiler water setback cost
savings.
Central Heat Diff above
The boiler stops when the water temperature rises 'Diff Above' degrees above the setpoint.
Central Heat Diff Below
The boiler starts when the water temperature drops 'Diff Below' degrees below the setpoint.
Domestic Hot Water Setpoint
The Domestic Hot Water (DHW) Setpoint parameter is used to create a minimum boiler water temperature setpoint
that is used when DHW heat demand is "on".
When the DHW heat demand is not "on" (the contact is open or not wired) this setpoint is ignored.
Domestic Hot Water Thermostat "Sleep" or "away" Setback Setpoint
Thermostat setback setpoint is used when the EnviraCOM thermostat is in "leave" or "sleep" modes and sensed
at E-COM terminals D, R, and C. When setback is "on" the thermostat setback setpoint shifts the DHW setpoint to
lower the IWH temperature and to save energy while home is in a reduced room temperature mode.
Domestic Hot Water Diff above
The boiler stops when the water temperature drops 'Diff Above' degrees above the setpoint.
Domestic Hot Water Diff Below
The boiler starts when the water temperature drops 'Diff Below' degrees below the setpoint.
Domestic Hot Water Priority (DHWP)
When Domestic Hot Water Priority is Enabled and Domestic Hot Water (DHW) heat demand is "on" the DHW
demand will take "Priority" over home heating demand. When the System and Boiler pumps are configured as
"Central Heat (off DHW priority)" or "Central Heat, Optional Priority" then they will be forced "off" during DHW
Priority. Priority protection time of one hour is provided to end DHWP in the event of a failed or excessive DHW
demand.
Parameter and Description
Parameter and Description