Dometic DF Series Service Manual

HEATING
FURNACES
Form No. 31315 07/18 | ©2018 Dometic Corporation
AFS/DFS, AFM/DFM, AFL/DFL, 79/80, 85/89
EN
DF Series Furnaces
Service Manual

Dometic DF Series Specifications

General

Brand	Dometic
Model	DF Series
Category	Furnace
Language	English

Summary

Explanation of Symbols and Safety Instructions

Operational Issues and Diagnostics

Operational Issues and Diagnostics Tables

Covers furnace issues, potential causes, and diagnostic procedures for components.

Component Locations

AF/DF Series Component Locations

79/80 Series Component Locations

85/89 Series Component Locations

Sequence of Operation and Wiring Diagrams

DC Models Operation, Wiring, and Error Codes

Details DC model sequence, wiring, and diagnostic error codes.

AC Models Operation and Wiring

Details AC model sequence and provides wiring diagrams.

Two-Stage Models Operation and Wiring

Details two-stage model sequence and provides wiring diagrams.

Diagnostic Procedures

AC Board/Thermostat Diagnostics

Guides on diagnosing issues related to the AC board and thermostats.

Blower Wheel, Combustion Wheel, and Motor Diagnostics

Covers diagnosing issues with blower wheel, combustion wheel, and motor.

Burner Head, Electrode, and Gas Valve Diagnostics

Covers diagnosing issues with burner head, electrode, and gas valve.

Circuit Board, Circuit Breaker, Limit Switch, and Sail Switch Diagnostics

Covers diagnosing issues with circuit board, breaker, limit switch, and sail switch.

Heating Issues

Identifying Heating Issues and Gas Pressure

Lists common heating issues, potential causes, and gas pressure checking procedures.

Ducting Inspection and Issues

Provides guidance on inspecting duct systems for issues like kinks, bends, and obstructions.

Duct Locations, Return Air, and Voltage Checks

Service Procedures

Accessing Furnace Components

Provides instructions on how to access furnace components for servicing.

Blower Wheel, Burner Head, Circuit Board, Circuit Breaker, and Combustion Wheel Servicing

Electrode, Limit Switch, Motor, and Relay Servicing

Details procedures for servicing electrode, limit switch, motor, and relay.

Sail Switch and Gas Valve Servicing

Details procedures for servicing the sail switch and gas valve, including testing.

Solenoid/Gas Valve and Orifice Replacement

Maintenance

Periodic Maintenance Schedule

Outlines a yearly maintenance schedule for various furnace components.

Component-Specific Maintenance

8500 Series Furnace Recessed Vent

Warning

Warning Carbon Monoxide Poisoning

Warns about carbon monoxide poisoning risks from improper installation.

Manifold Installation AFS, AFM, AFL Furnaces

Warning: Personal Injury or Death

Warning: Explosion or Fire

Warns of explosion or fire hazards due to improper installation or maintenance.

Kit External Relay Replacement DC Ignition Controls