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ELECTRICAL DATA
Electrical Rating:
0 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40°F to 150°F
Reset Operation
If a voltage spike or static discharge blanks out the display or causes
erratic thermostat operation you can reset the thermostat by pressing
and at the same time while moving the SYSTEM switch from
OFF to HEAT. This also resets the factory defaults. If the thermostat
has power, has been reset and still does not function correctly contact
your heating/cooling service person or place of purchase.
Batteries
For optimum performance, we recommend replacing batteries once
a year with fresh “AAA” Energizer
®
alkaline batteries.
SPECIFICATIONS
TROUBLESHOOTING
Symptom Possible Cause Corrective Action
No Heat/No Cool/No Fan
(common problems)
Blown fuse or tripped circuit breaker. 1.
Furnace power switch to OFF.2.
Furnace blower compartment door or panel 3.
loose or not properly installed.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
No Heat
Pilot light not lit. 1.
SYSTEM Switch not set to 2. HEAT.
Loose connection to thermostat or system. 3.
Furnace Lock-Out Condition. Heat may also be 4.
intermittent.
5. Heating system requires service or thermostat
requires replacement.
Re-light pilot.
Set SYSTEM Switch to HEAT and raise setpoint
temperature above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut
down when a lock-out condition occurs. If the
heat works intermittently contact the furnace
manufacturer or local service person for
assistance.
Diagnostic: Set SYSTEM Switch to HEAT and
raise the setpoint above room temperature. Within
a few seconds the thermostat should make a soft
click sound. This sound usually indicates the ther-
mostat is operating properly. If the thermostat does
not click, try the reset operation listed above. If the
thermostat does not click after being reset contact
your heating and cooling service person or place
of purchase for a replacement. If the thermostat
clicks, contact the furnace manufacturer or a
service person to verify the heating is operating
correctly.
No Cool
SYSTEM Switch not set to COOL. 1.
Loose connection to thermostat or system. 2.
Cooling system requires service or thermostat 3.
requires replacement.
Set SYSTEM Switch to COOL and lower setpoint
temperature below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure as diagnostic for No Heat
condition except set the thermostat to COOL and
lower the setpoint below the room temperature.
There may be up to a five minute delay before the
thermostat clicks in Cooling.
(8 pages)
(44 pages)
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