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AHD025B
Ena – Default, enabled, press fan button until OFF appears on display
dis – disabled
Economy Function Enabled (ECo):
Selects whether or not thermostat can be
manually placed in economy mode by pressing the fan button
Ena – Default, enabled, press fan button until Eco and
ECON appears on display
dis – disabled
Comfort Setpoint (CS):
Selects setpoint default temperature when thermostat
powers up or returns to comfort mode from economy mode
72.0°F (22.0°C) Default
Programmable Range: 60.0°F to 85.0°F (15.5°C to 29.5°C)
Cooling Limit (LC): Selects minimum room temperature in cooling
65.0°F (18.5°C) Default
Programmable Range: 60.0°F to 85.0°F (15.5°C to 29.5°C)
Heating Limit (LH): Selects maximum room temperature in heating
85.0°F (29.5°C) Default
Programmable Range: 60.0°F to 85.0°F (15.5°C to 29.5°C)
Freeze Protection (FP):
Selects freeze protection enabled or disabled
Ena – Default, enabled at 40°F
dis – disabled
Fan Purge Timer (FPt): Selects the amount of time the fan will continue to run
after a heating or cooling call.
30 seconds Default
Programmable Range: 0 (Off) to 180 seconds (3 minutes), in 10 second
increment
Clear Logged Data (CLr): Selects whether or not the logged run time data will be
reset to 0’s
no – Default, no reset
Yes – reset
Setback Ramping (Sbr):
Selects setback function to step back to economy
setpoints or to go directly to economy setpoints.
dis - Default, disabled, directly to economy setpoint
Ena – enabled, ramps to economy setpoints
OFf - directly to Off mode
Ramping Setback Timer (rSt):
After setback is initiated, selects the amount
of time the setpoint will be stepped back by the degrees per setback
Example: if both parameters are defaulted, the thermostat will step back
1° per every 30 minutes until either the economy cooling limit (EC) or
the economy heating limit (EC) is reached.
30 minutes Default
Programmable Range: 1 minute to 720 minutes (12 hours), in 15 minute
increment
Degrees Per Setback (dPs):
Selects the number of degrees per time period that the
setpoint will be stepped back
1° Default
Programmable Range: 0°F to 3°F, in 0.5°F increments
Economy Cooling Limit (EC):
When in economy or remote setback mode, selects
the highest room temperature before cooling turns on. Cooling turns off
when temperature falls below EC value.
85.0°F (29.5°C) Default
Programmable Range: 72.0°F to 99.0°F (22.0°C to 37.0°C), in 0.5°F increments
Economy Heating Limit (EH):
When in economy or remote setback mode, selects
the lowest room temperature before heating turns on. Heating turns off when
temperature rises above EH value.
60.0°F (15.5°C) Default
Programmable Range: 41.0°F to 72.0°F (5.0°C to 22.0°C),
in 0.5°F
increments
Fan Refresh Frequency (FrF):
Selects how often the low fan will operate for a fan refresh 0
hours Default, disabled
Programmable Range: 0 hours to 24 hours
Fan Refresh Duration (Frd):
Selects the length of time the low fan will operate during a
fan refresh
1 minute Default
Programmable Range: 1 minute to 45 minutes
Cycle Rate Timer (crt): Limits the number of heat/cool cycles per hour
6 cycles per hour Default, heat pump
8 cycles per hour Default, fan coil
Programmable Range: 0 (Off) to 12 cycles per hour, heat pump
Programmable Range: 0 (Off) to 24 cycles per hour, fan coil
Differential (Dif): Selects the minimum room temperature above or below setpoint when
heating or cooling will turn on or off.
0.4°F (0.2°C) Default
Programmable Range (°F): 0.2, 0.4, 0.6, 0.8, 1.0, 1.2
Programmable Range (°C): 0.1, 0.2, 0.3, 0.4, 0.5, 0.6
Setpoint Hold Timer (SH): Selects a time limit that the occupant’s setpoint will be saved,
when in economy mode.
0 hours Default, disabled
Programmable Range: 0 to 24 hours
Fan Hold Timer (HFt): Selects a time limit the high and low fans will operate before
automatically returning to auto mode.
0 hours Default, disabled
Programmable Range: 0 to 24 hours
Shutdown Delay (Sdd):
Selects the amount of time delay between remote shutdown
signal and the thermostat going into shutdown mode.
0 seconds Default, immediate
Programmable Range: 0 seconds to 200 minutes
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 92:
Restore Factory Presets
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 92 then press
the fan button.
Step 3: All and Erase will appear on the display. Press the fan button again to rest to
factory defaults.
Step 4: Press Up or Down arrow until End / Prog appear on the display.
Step 5: Press fan button to save changes and exit the program mode. You will
need to re-enter programming mode to access a different code.
NOTE: This procedure does not affect the stored switches in memory. See the
“Programming the Radio Receiver” section for methods to clear this
memory.
Installation
Junction box mounting is highly recommended. For optimal radio performance do
not mount or place the receivers close to the floor or inside a metal housing.
INSTALLATION OPTION A:
Heat Pump Configuration
Step 1: Read all steps for this option before taking any action to install
thermostat.
Step 2: WARNING: To avoid risk of fire, shock, or death, TURN OFF POWER
at circuit breaker or fuse and verify that it is OFF before installation
begins. Make sure that it remains OFF until installation is complete.
Step 3: If retrofitting old thermostat, remove old thermostat, carefully noting the
wire connections on the old unit. Record wire color and terminal legends
(Cable wire color for Control Feed, Load Feed, Common, Auxiliary
Heat, Compressor, Low Fan, High Fan, and Reversing Valve). Refer to
Table A.
Step 4: Install mounting bracket to the junction box with provided mounting
screws.
Step 5: Wire thermostat according to function as shown in Figure A.
Step 6: Push wires into junction box. Rest bottom of thermostat on mounting
tabs in mounting plate. Push top of thermostat towards wall and secure
into place with self-tapping screw.
Step 7: Turn power on.
INSTALLATION OPTION B:
4-Pipe Fan Coil Configuration
Step 1: Read all steps for this option before taking any action to install
thermostat.
Step 2: WARNING: To avoid risk of fire, shock, or death, TURN OFF POWER
at circuit breaker or fuse and verify that it is OFF before installation
begins. Make sure that it remains OFF until installation is complete.
Step 3: If retrofitting old thermostat, remove old thermostat, carefully noting
the wire connectinos on the old unit. Record wire color and terminal
legeneds (Cable wire color for Control Feed, Load Feed, Common,
Auxiliary Heat, Compressor, Low Fan, High Fan, and Reversing Valve).
Refer to Table A.
Step 4: Install mounting bracket to the junction box with provided mounting
screws.
Step 5: Wire thermostat according to function as shown in Figure B. NOTE: If
the mechanical system has only two fan speeds: Green - Low Fan, Violet
- High Fan, Orange - Not used.
Step 6: Push wires into junction box. Rest bottom of thermostat on mounting
tabs in mounting plate. Push top of thermostat towards wall and secure
into place with self-tapping screw (included).
Step 7: Turn power On.
INSTALLATION OPTION C:
2-Pipe Fan Coil Configuration
NOTE: Continuous fan is not available on 2-Pipe with aquastat systems.
Continuous fan is available on 2-Pipe with electric heat
systems.
