Aprilaire 8265 User Manual

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

Aprilaire 8265 Specifications

General

Brand	Aprilaire
Model	8265
Category	Thermostat
Language	English

Summary

THERMOSTAT DETAILS

O/B Terminal Selection Switch

Switch for selecting heat pump changeover relay control (O or B).

Feature Configuration Clips

MOUNTING AND WIRING

Electrical and Installation Safety

Critical safety warnings regarding electrical shock and improper installation.

System Configuration Options

Details on setting up the thermostat for various heat pump and system configurations.

ATTACH THERMOSTAT BASE TO WALL

Base Mounting Procedure

Step-by-step instructions for physically attaching the thermostat base to the wall.

Wiring Connections and Safety

Instructions for making wire connections and ensuring electrical safety.

System Wiring Diagrams

THERMOSTAT OPERATION CHECK

System Operation Tests

Procedures to verify the correct operation of fan, heating, and cooling systems.

CONFIGURATION MENU

Entering and Navigating Menu

Configuration Options Overview

PROGRAMMING YOUR THERMOSTAT

Setting Current Time and Day

Entering Heating Program

Entering Cooling Program

CHECK YOUR PROGRAMMING

Reviewing Program Settings

TROUBLESHOOTING

Reset Operation

TROUBLESHOOTING (CONTINUED)

Common Troubleshooting Scenarios

Addresses common issues like no heat/cool/fan, constant running, and inaccurate temperature readings.