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©2013 HeatLink Group Inc.
L646544U
2013-01-08
#46544 Digital Thermostat
User Guide - Page 1 of 4
Parameter Number
Parameter Menu
Temperature Unit
Type of Sensor Used and
Temperature Displayed
(see legend below)
Regulation = Internal or external ambient sensor.
Regulation = Floor sensor.
Regulation = Internal sensor with fl oor limitation.
View of the external sensor temperature.
Plus Button
Lock Indicator
Cooling Demand Indicator
Heat Demand Indicator
COMFORT MODE
AUTO-SETBACK MODE
SETBACK MODE
FREEZE PROTECTION MODE
TIMER MODE
OFF MODE
Left Button
Minus Button
Back Button
Right Button
Edition Button
OK Button and Status LED
Status LED
Solid Red (when backlight is lit up) = heating demand
Solid Green (when backlight is lit up) = cooling demand
Flashing Red = sensor error
Flashing Green = waiting for input
The
46544 HeatLink Digital Thermostat
is a 24Vac electronic
thermostat designed to provide accurate temperature control of hydronic
fl oor heating systems. Features include:
• Large 2" (50 mm) backlit LCD display, with a large temperature display.
• Proportional plus Integral (PI) controlled temperature regulation.
Proportional moves quickly to the desired setpoint and slows
down when the desired setpoint is near. Integral compensates the
proportional offset (overshoot) and stays close to the setpoint.
Output signal is either Pulse Width Modulation (PWM) or Hysteresis
(on/off).
• Fast switching between modes; temperature setpoint is adjustable at
the press of a button.
• Accepts timer signal for automated setback operation (requires 46643
Timer Thermostat or 46673 Heat/Cool Thermostat).
• Floor warming functionality is available through NTC terminal by adding
an optional 10K fl oor sensor; the sensor acts as a fl oor temperature
limiter (min / max fl oor temperatures are adjustable in the Parameter
Menu).
Technical Information
Measured temperature precision
0.1°C (or 0.2°F)
Operating temperature
0 to 40°C (or 32 to 104°F)
Setting temperature range
5 to 37°C by 0.5°C step
(or 41 to 99°F by 0.5°F step)
Regulation characteristics
Proportional Integral regulation or
Static differential
(see Installer Parameters
L646544N)
Electrical protection
Class II - IP30
Power supply
24 Vac +/- 10%
Output
TRIAC output 24 VAC, 15 W max.
(4 actuators)
External sensor
(sold separately)
NTC (10K Ohms)
