Aprilaire 8870 installation instructions

Installation Instructions

MODEL 8870

These instructions are for connecting

the Thermostat to the HVAC equipment.

To connect communication features,

please reference the Communicating Thermostat

System Installation Manual.

Contents

Main INSTALLATION INSTRUCTIONS MANUAL TABLE OF CONTENTS READ COMPLETE SAFETY & INSTALLATION INSTRUCTIONS BEFORE STARTING WARNING MODEL 8870 THERMOSTAT SPECIFICATIONS: 1. HVAC SYSTEM PRE-INSTALLATION CHECK LIST 2. WHATS IN THE BOX 3. SELECT THE THERMOSTAT LOCATION DO NOT 4. DISASSEMBLY 5. MOUNT BASE TO WALL Page 7. WIRING THE THERMOSTAT Page Page Page 11 CHECK-OUT PROCEDURE FIGURE 7 HEAT PUMP ONLY EM. HEAT HEAT-AUX 10. OPTIONAL HVAC SET-UP FEATURES 11. TO ACCESS THESE HVAC SET-UP FEATURES 11. TO ACCESS THESE HVAC SET-UP FEATURES (Cont.) Page APRILAIRE MODEL 8870 THERMOSTAT SEE NOTE 16 DIAGRAM 1 SINGLE STAGE FURNACE AND AC APRILAIRE MODEL 8870 THERMOSTAT SEE NOTE 17 DIAGRAM 2 TWO STAGE FURNACE AND TWO STAGE AC 18 DIAGRAM 3 ROOF TOP UNIT (TWO STAGE HEAT AND TWO STAGE COOL) SEE NOTE 19 DIAGRAM 4 BOILER WITH AC (TWO TRANSFORMERS) IMPORTANT! 20 SEE NOTE DIAGRAM 5 SINGLE STAGE HEAT PUMP SEE NOTE IMPORTANT! DIAGRAM 6 TWO STAGE HEAT PUMP HVAC wires to R and C. 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) 21 Aprilaire Model 8024 24-volt Relay Pack IMPORTANT! 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING (SEE NOTE) 22 DIAGRAM 7 FIRST STAGE RADIANT FLOOR HEAT SECOND STAGE FURNACE ONE STAGE OF COOLING Page Page Page THE BEST IN INDOOR AIR COMFORT Automatic Humidifiers High Efficiency Air Cleaners Energy Recovery Ventilators Zone Control Systems