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Programmable Thermostat

Model 8265 Installation and Operation Manual

5/2 Day Programmable Heat Pump Thermostat

PREPARATIONS

Assemble tools required as shown below.

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.

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

W903

Clip to Disable

Progressive Recovery

Feature

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

Summary of Contents for 8265

Page 1: ...questions please call Research Products Corporation at 800 334 6011 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 W903 Clip to Disable Progressive Recovery Feature Mounting hole W906 for Emergency Heat Second Stage Fan Contr...

Page 2: ...his thermostat is factory set to the B position This will accommodate the majority of heat pump applications which require the changeover relay to be energized in HEAT If the heat pump being installed with this thermostat requires an O terminal to energize the changeover relay in COOL the O B switch must be moved to the O position Take care when securing and routing wires so they do not short to a...

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: ... 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 immediately on high speed followed by cold air circulation 3 Press to adjust temperature setting above room te...

Page 5: ...ating and cooling system loses power It will also wait 5 minutes minimum between cooling and heating cycles OPERATING FEATURES Now that you are familiar with the thermostat buttons and display read the following information to learn about the many features of the thermostat SIMULTANEOUS HEATING COOLING PROGRAM STORAGE When programming you can enter both your heating and cooling programs at the sam...

Page 6: ...ing start time and temperature Use the table on page 7 to plan your program time periods and the temperatures you want during each period You may also want to look at the sample program table to get an idea of how the thermostat can be programmed ENTER HEATING PROGRAM 1 Move the SYSTEM switch to HEAT 2 Press PRGM once MO TU WE TH FR indicating weekday program will appear in the display Also displa...

Page 7: ...e display or causes erratic thermostat operation you can reset the thermostat by pressing and TIME at the same time 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 Energi...

Page 8: ...he cycle time clip Jumper W 905 as mentioned in the instructions for Hydronic Heating Systems It is not possible to shorten the cycle time If an acceptable cycle rate is not achieved as received or by clipping W 905 contact a local service person for additional suggestions Thermostat Setting and Thermostat Thermometer Disagree Thermostat thermometer setting requires adjustment The thermometer can ...

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