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AHD025B
Installation Guide
E3X-T02-U2W
24VAC Thermostat
Overview
The 24VAC Thermostat provides digital temperature control of heating and cooling–with
wireless communication to multiple ILLUMRA devices. It is designed for use with most
basic gas/electric furnace/air conditioning units, PTHP/PTAC Systems, 4-pipe, or 2-pipe
fan coil systems. Solid-state control outputs allow switching of electronic and relay loads
of 1.5 amps. This control operates from a single setpoint with automatic changeover
between heating and cooling. The fan cycles on/off with calls for heating or cooling or can
operate continuously in either low, medium, or high speed. The control can be placed in
economy mode or off mode with 40° freeze protection. Economy mode is enabled and
disabled by one or more compatible transmitters.
Compatible Devices
Key Card Access Switch; E3T-C1AWH
Single Rocker Self-powered Wireless Light Switches; E3T-S1Axx
Dual Rocker Self-powered Wireless Light Switches; E3T-S2Axx
Dual Rocker Handheld Remote; E3T-S2Hxx
SLT Wireless Sensor; E3T-Rxx-2INBP
Self-powered Wireless Occupancy Sensor; E3T-Mxx-SB24
More transmitters available
Components Included
The following items are included with this product:
A -- (1) ILLUMRA 24VAC Thermostat
B -- (2) Mounting Screws (6/32” x 3/4”)
C -- (1) Self Tapping Screw
D -- (1) Mounting Bracket
Optional Accessories
A -- Horizontal Mounting Plate (not included)
Tools Needed for Installation
Phillips Screwdriver
Electrical Tape
Wire Nuts
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Programming the Thermostat
CAUTION: ILLUMRA Relay Receivers are to be installed and/or used in compliance
with relevant electrical codes and regulations. If you are unsure about any portion of
these instructions, please contact a qualified electrician. These devices are intended for
indoor use, for permanently installed fixtures, and for dry locations.
Connect the thermostat to a 24VAC power source for initial setup. DO NOT
CONNECT THE OTHER WIRES UNTIL THIS STEP IS COMPLETE. PREVENT
ALL OTHER WIRES FROM TOUCHING DURING THIS PROCESS TO
AVOID DAMAGE TO THE THERMOSTAT. DAMAGE DUE TO INCORRECT
WIRING WILL VOID WARRANTY.
The programming mode has a time limit of 10
minutes. After 10 minutes, the thermostat will resume normal operation. The default
values mentioned throughout this section refer to factory programmed settings. If the
thermostat has been custom programmed, the defaults may not apply.
NOTE: For programming large numbers of devices, an accessory is available to copy
settings from one device to another. Contact ILLUMRA for details.
Access Code 43:
Configuration Mode
Step 1: Place thermostat into programming mode by pressing and holding the UP
and DOWN arrows while sliding the °F/°C switch to the opposite side. 00
will appear on the display. Do not use the °F/°C switch again until done
programming.
Step 2: Press either the up or down arrow button to find the access code 43 then
press the fan button.
Step 3: Press either the up or down arrow button to scroll through the menu to
reach the desired parameter (see below), then press the Fan button.
Exit Menu (Ext):
Equipment Type (E9P): Type of Equipment
tHP - Default, Trane heat pump, type O reverse valve
tAC - Trane AC with electric heat
FHP - Friedrich heat pump, type B reverse valve
FAC - Friedrich AC with electric heat
gHP - GE heat pump, type B reverse valve
gAC - GE AC with electric heat
AHP - Amana heat pump, type B reverse valve
AAC - Amana AC with electric heat
FC - fan coil
Reverse Valve Type (typ): Selects the valve type
O type - Default, energizes in calls for cooling
B type - energizes in calls for heating
Heat Pump or AC (Pt):
HP - Default, 2 stage heat, single stage cool
Y = compressor, W = 2nd stage heat
AC - AC and electric heat
Y = cool, W = heat
Fan Speed and Operation (FOp):
1U - single speed user selectable fan
1C - single speed constant fan
1A - single speed auto fan
2U - Default, two speed user selectable fan
2C - two speed constant fan
2A - two speed auto fan
Three speed fan only available for fan coil equipment
3U - three speed user selectable fan
3C - three speed constant fan
3A - three speed auto fan
Compressor Protection (FCp): Selects the compressor protection and high or low
speed fan in heating
CP - Default heat pump, compressor protection and high fan is allowed in heating
NP - Default fan coil, no compressor protection and high fan is allowed in heating
CP - compressor protection and high fan is allowed in heating
nP - no compressor protection and only low fan is allowed in heating
cP - compressor protection and only low fan is allowed in heating
Continuous Fan Operation (CFL): Selects continuous fan operation
Dis - Default, normal fan operation
Ena - continuous low fan in auto or economy modes
Step 4: Press either up or down to reach desired change.
Step 5: Press fan button to return to program menu.
Step 6: Press Up or Down arrow until End / Prog appear on the display.
Step 7: Press fan button to save changes and exit the program mode. You will need
to re-enter programming mode to access a different code.
Access Code 79:
Field Programming Mode
Step 1: Place thermostat into programming mode by pressing and holding the UP
and DOWN arrows while sliding the °F/°C switch to the opposite side. 00
will appear on the display. Do not use the °F/°C switch again until done
programming.
Step 2: Press either the up or down arrow button to find the access code 79 then
press the fan button.
Step 3: Press either the up or down arrow button to scroll through the menu to
reach the desired parameter (see below), then press the Fan button.
Step 4: Press either up or down to reach desired change.
Exit Menu (Ext):
Temperature Scale (Unt): Selects scale parameter that will be shown
F - Default,°F
C - °C
Display Temperature (dSP): Selects which temperature is shown on display
SP - Default, display will show setpoint only
rt - display will show room temperatue unless either up or down arrow button is
pressed. Then the display will show setpoint.
Srt - display will toggle between room temperature and setpoint. Display will
revert to setpoint when either the up or down arrow button is pressed.
Temperature Control Mode (HAc):
USr - Default, switch selectable, heat only, auto changeover or cool only
AUt - auto mode only
CL - cool mode only
Ht - heat mode only
Off Function Enabled (OFf): Selects whether or not thermostat can
be turned off by pressing the fan button
