Specifications

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On/Off Thermostats - Programmable
ETN24-HC21-PROG-ECO
Wall-mount, 24VAC thermostat, with weekly
program built-in and fresh air damper output
The ETN-24-HC21-PROG-ECO is a fully featured,
stylish thermostat, suitable for commercial and
residential applications. It can control a large variety of
HVAC systems with different configurations. It offers a
selectable number of heating and cooling stages and a
fresh Air Damper output - damper opens automatically
or manually.
The ETN-24-HC21-PROG-ECO is an attractive
thermostat with a large, easy to read display.
Features
y 24VAC wall-mount thermostat
y 2 stages of Heat and 1 stage of Cool
y Adjustable Electric and Oil/Gas system
y Outdoor sensor- option
y Fresh Air Damper output
y 5-1-1 programmable; 4 periods per day, each
with Set Heat and Set Cool
y Energy saving – cost efficient, Environmental Friendly
logic
y Offset – for temperature reading adjustment
y Freeze Protection even when thermostat is OFF
y Economy mode (set back)
y °F scale, AM/PM clock
DAMPER
CONTROL
HEAT
°F
AUTO FAN
ECONOMY
RT03
COMPRESSOR
DELAY
PROG
EXT.
SENSOR
OPTION
Wiring diagram