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Thermostat

Model 8246 Installation and Operation Manual

Non-Programmable Heat Pump Thermostat

PREPARATIONS

Assemble tools required as shown below.

Electric or cordless 
drill with 3/16 inch 

drill bit, if needed.

Flat blade 

screwdriver

Wire cutter/stripper

Level

THERMOSTAT DETAILS

W905 Clip for

Slow 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 property damage. If you have any questions, please call Research Products Corporation at (800) 334-6011.

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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