Heat Link 31360, Manual

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HeatLink
®
Mixing Valve Reset Control Stk# 31360
®
Link Heat
www.heatlinkgroup.com
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Symbol Description
User Interface / General Operation
General Operation
Pump
Displays when the mixing system pump is in
operation.
Burner
Displays when the boiler relay is turned on.
Occupied Schedule
Displays when the control is in occupied (Day)
mode.
Unoccupied Schedule
Displays when the control is in unoccupied (Night)
mode. UNOCC
°F, °C
Displays the unit of measure that all of the
temperatures are to be displayed in the control.
Pointer
Displays the control operation as indicated by
the text. OCC
˚ F, ˚C
Powering Up The Control
When the HeatLink
®
Mixing Valve Reset Control Stk# 31360 is powered up, the control displays the control type number in the LCD for 2 seconds.
Next, the software version is displayed for 2 seconds. Finally, the control enters into the normal operating mode.
Operation
The Stk# 31360 uses a floating action mixing valve to vary the supply water temperature to a hydronic system. The supply water temperature is
based on either the current outdoor temperature, or a fixed setpoint.
Outdoor Reset (North American version)
The amount of heat lost by a building changes depending on the outdoor air temperature. The
amount of heat supplied by the heating system must be equal to the amount of heat being lost
in the building. If the amount of heat supplied is not equal, the building will either overheat
or cool off.
When the Outdoor Design setting is set to a temperature, the control calculates a mix supply
temperature based on the outdoor air temperature and the programmed reset ratio.
Setpoint Control
When the outdoor design (OUTDR DSGN) setting is set to OFF, the Stk# 31360 supplies a fixed mixing supply temperature equal to the MIX
TARGET setting. An outdoor sensor is not required during this mode of operation.
Outdoor Design
Increasing W
ate
r
Temperature
Design Supply
Decreasing Outdoor Temperature
Terminal Unit
Indoor Design
European Version
North American & European Versions (differences where noted)
Starting
Point
(Fixed)
Mix Design
Outdoor Design
Decreasing Air Temperature
Increasing Water Temperature
North American Version
Outdoor Reset (European version)
When the outdoor design (OUTDR DSGN) setting is not set to OFF, the Stk# 31360 calculates
a mixing supply water temperature based on the outdoor air temperature. The Stk# 31360 uses
a Characterized Heating Curve and optionally indoor temperature feedback from an indoor
sensor in this calculation.