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5

also wait 5 minutes minimum between cooling and heating cycles. 
This is intended to help protect the compressor from short cycling. 
Some newer compressors already have a time delay built in and 
do not require this feature. Your compressor manufacturer can tell 
you if the lockout feature is already present in their system. When 
the thermostat compressor time delay occurs it will fl ash the 

Snowfl ake

 and 

Flame icons

 for about fi ve minutes.

4.  

Select Temperature Display Adjustment 3 LO to 3 HI

 – 

Allows you to adjust the room temperature display up to 3° higher 
or lower. Your thermostat was accurately calibrated at the factory 
but you have the option to change the display temperature to match 
other temperature measuring devices. The current or adjusted room 
temperature will be displayed on the left side of the display.

5.  To exit the confi guration menu, move the SYSTEM switch from the 

OFF position.

6

7

8

6

9

10

8

5

4

3

2

1

FIGURE 5 – Thermostat buttons, display and switches

CONFIGURATION MENU

The confi guration menu allows you to set certain thermostat operating 
characteristics to your system or personal requirements.

1.  To enter the confi guration menu, with SYSTEM switch in OFF 

position, hold 

 and 

 for at least two seconds. 

2.  

Select Fast or Slow Cycling

 – In the run mode, if the setpoint 

temperature is manually raised by 3°F (2°C) or more above the actual 
temperature with the TEMPERATURE UP key, and the fast second 
stage feature is enabled (FA on), the second stage will energize 
immediately. With FA off, second stage will not energize until the 
setpoint temperature is 1°F or more beyond actual temperature for 
more than ten minutes.

3.  

Select Compressor Lockout CL OFF or ON

 – Selecting CL ON 

will cause the thermostat to wait 5 minutes before turning on the 
compressor if the heating and cooling system loses power. It will 

CONFIGURATION MENU

Step

Press Button(s)

Displayed 

(Factory Default)

Press 

 or 

 

to select:

1

Set SYSTEM switch 

to OFF

2

 

and 

 for 

at least 2 seconds

FA (ON)

OFF

3

 

and 

 

momentarily

CL (OFF)

ON

4

 

and 

 

momentarily

0 HI (0)

3 LO to 3 HI

5

Move SYSTEM 

switch from OFF

Return to normal operation

SPECIFICATIONS

ELECTRICAL DATA

Electrical Rating:

 

20 to 30 VAC 50/60 Hz.

 

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

CLEANING THE THERMOSTAT

If the surface of the thermostat becomes dirty it can be cleaned with 
plain water or a non-abrasive household cleaner including glass 
cleaner. When using any cleaner, be careful not to get any into the 

interior of the thermostat. 

Do not spray any liquid directly onto 

the thermostat.

 Spray the cleaner onto a soft cloth and wipe the 

surface of the thermostat. 

TROUBLESHOOTING

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 when system is switched from “OFF” 

to “HEAT” position. 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.

Summary of Contents for 8246

Page 1: ... Cycle instead of Fast Cycle W904 Clip for Celsius instead of Fahrenheit Mounting hole W906 for Emergency Heat Second Stage Fan Control Clip for Fan Control by Equipment instead of by Thermostat O B Terminal Selection Switch Mounting hole FIGURE 1 Thermostat Base Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and or pro...

Page 2: ...RMOSTAT APPLICATIONS Description Heat Pump No Aux or Emergency Heat Yes Heat Pump with Aux or Emergency Heat Yes Standard Heat Cooling Systems No Standard Heat Only Systems No Millivolt Heat Only Systems Floor or Wall Furnaces No Description Standard Central Air Conditioning No Gas or Oil Heat No Electric Furnace No Hydronic Hot Water Zone Heat 2 Wires No Hydronic Hot Water Zone Heat 3 Wires No 12...

Page 3: ... Damage to equipment will occur when power is restored NOTE The accessory relay scheme is required when safety circuits exist in both systems NOTE See Note Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency FIGURE 2 Typical wiring diagram for single transformer systems ATTACH THERMOSTAT BASE TO WALL 1 Remove the packing material from the thermostat Gently pull the co...

Page 4: ...ux system is operating 3 Press to adjust the thermostat below room temperature The Aux heating system should stop operating To prevent compressor and or property damage if the outdoor temperature is below 50 F DO NOT operate the cooling system CAUTION COOLING SYSTEM 1 Move SYSTEM switch to COOL position 2 Press to adjust thermostat setting below room temperature The blower should come on immediate...

Page 5: ...rature for more than ten minutes 3 Select Compressor Lockout CL OFF or ON Selecting CL ON will cause the thermostat to wait 5 minutes before turning on the compressor if the heating and cooling system loses power It will CONFIGURATION MENU Step Press Button s Displayed Factory Default Press or to select 1 Set SYSTEM switch to OFF 2 and for at least 2 seconds FA ON OFF 3 and momentarily CL OFF ON 4...

Page 6: ...ng system requires service or thermostat requires replacement 1 Re light pilot 2 Set System Switch to HEAT and raise setpoint above room temperature 3 Verify thermostat and system wires are securely attached 4 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 5 D...

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