Atwood AFMD30 - User Manual

Literature number 31971
hydro flame™
AFM Series Furnaces Models
AFMD16
AFMD20
AFMD25
AFMD30
AFMD35
Technical Installation Manual
1120 North Main Street • Elkhart, IN 46514
USA & Canada : 1-866-869-3118
Internet: http://www.atwoodmobile.com
English, Français (et Canada)
This instruction manual is for use by an authorized service technician to
install an Atwood – hydro flame™ furnace. Should you require further
information, contact your dealer or Atwood Mobile Products LLC.
This furnace design has been certified for installation in recreation
vehicles as a MSP Category III furnace. Follow this installation
instruction to insure safe operation of the furnace. Failure to install
furnace according to this installation instruction nullifies the furnace
warranty.
Effective 5/2014
WARNING
Installation of this appliance must be made in accordance with the written
instructions provided in this manual. No agent, representative or
employee of Atwood or other person has the authority to change, modify
or waive and provision of the instructions contained in this manual.
WARNING
Avoid possible injury or death
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life. Refer to the
installation instructions and/or owner’s manual provided with this
appliance. A qualified installer, service agency or the gas supplier must
perform installation and service.
CRITICAL INSTALLATION WARNINGS
 DO NOT install furnace on material that restricts return air, like carpet
or any soft material such as vinyl.
 DO NOT install furnace where clearance to combustibles cannot be
maintained.
 DO NOT modify furnace in any way.
 DO NOT alter furnace for a positive grounding system.
 DO NOT hi pot furnace unless electronic ignition system (circuit
board) has been disconnected.
 DO NOT use battery charger to supply power to DC model furnace
even when testing.
 DO NOT use 120-volt AC current with DC models.
 DO NOT use furnace cabinet area as a storage compartment.
 DO NOT vent furnace with venting system serving another appliance.
 DO NOT vent furnace to an outside enclosed porch area.
 DO NOT use for temporary heating of buildings or structures under
construction.
 Protect building materials from degrading from flue gas exhaust.
 Protect furnace electrical components from water.
 Compartment must be closed when operating unit.
 Should the gas supply fail to shut off or if overheating occurs, shut off
the gas valve to the furnace before shutting off the electrical supply.
 DO NOT use this furnace if any part has been under water.
CAUTION
PERSONAL INJURY
All sheet metal edges are sharp care should be taken when
handling or brushing up against them.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
WARNING
Be sure the furnace and all ignition systems are “off” during any type of
refueling and while vehicle is in motion or being towed.
TO THE INSTALLER: LEAVE THIS MANUAL WITH
THE APPLIANCE.
TO THE CONSUMER: RETAIN THIS MANUAL FOR
FUTURE REFERENCE.
SAFETY ALERT SYMBOLS
Safety Symbols alerting you to potential personal safety
hazards obey all safety messages following these symbols
WARNING
Avoid possible injury or
death
CAUTION
Avoid possible injury
and/or property damage
WARNING
FIRE OR EXPLOSION
If the information in this manual is not followed exactly, a
fire or explosion may result causing property damage,
personal injury or loss of life.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS:
 Extinguish any open flame.
 Evacuate all persons from the vehicle.
 Shut off the gas supply at the gas container or
source.
 Do not touch any electrical switch, or use any
phone or radio in the vehicle.
 Do not start the vehicle’s engine or electric
generator.
 Contact the nearest gas supplier or qualified
service technician for repairs.
 If you cannot reach a gas supplier or qualified
service technician, contact the nearest fire
department.
 Do not turn on the gas supply until the gas
leak(s) has been repaired.
A qualified Service Technician
Service Center or gas supplier must perform
installation and service.

Summary

General Safety Warnings

Fire and Explosion Hazards

Warnings regarding fire or explosion risks, including handling flammable vapors and safe refueling practices.

Gas Leak Safety Procedures

Instructions on what to do if gas is smelled, emphasizing extinguishing flames and evacuating.

General Injury and Death Prevention

General warnings about potential injury or death from improper installation or handling.

Critical Installation Warnings

Installation Site and Clearance Requirements

Warnings about installation location, return air obstruction, and maintaining clearances to combustibles.

Modification, Grounding, and Power Restrictions

Prohibitions against modifying the unit, altering grounding, or using incorrect power sources.

Venting, Usage, and Protection Guidelines

Guidelines on venting, usage restrictions, and protecting components from water and flue gases.

Emergency Shut-off Procedure

Procedure for shutting off gas and electrical supply during emergencies like overheating.

Carbon Monoxide Safety Warnings

Vent and Door Sealing

Instructions to properly seal vent assemblies and doors to prevent carbon monoxide entry.

Air Intake and Exhaust Venting

Warnings against drawing combustion air from or venting exhaust into the living area.

Draft Cap Adjustment

Instruction to properly adjust the draft cap to prevent carbon monoxide entry.

Specifications and Model Information

Model Series Specifications

Minimum Clearances to Combustibles

Installation and Safety Codes

Applicable Codes and Standards

List of US and Canadian codes and standards that must be followed during installation.

General Furnace Location and Installation

Mounting Position and Location

Garage Installation Requirements

Furnace Installation Procedures

Level Installation and Sealing

Ensuring the furnace is installed level and sealing against water intrusion.

Sidewall Cutout and Venting System

Ducting and Component Connections

Vent Installation Types

Small Vent Installation

Flush Door Installation

Standard Door Installation

Air Flow and Gas Connections

Air Flow Check

Propane Gas Connection

Electrical Connections and Power Supply

Electrical Connection Warnings

Warnings regarding wiring errors, improper connections, and servicing procedures.

Power Supply Requirements

Thermostat Installation

Thermostat Mounting Guidelines

Operating Instructions

Initial Startup and Burn-off

Normal Operation Sequence

Ignition Lockout and Troubleshooting

Information on ignition lockouts and diagnostic codes provided by the control system.

System Checks and Gas Pressure Test

Propane Gas Pressure Test

Wiring and Ladder Diagram

Wiring Diagram

Schematic showing the electrical connections for the furnace components and power supply.

Ladder Diagram

Functional representation of the furnace's electrical control logic.

Atwood AFMD30 Specifications

General

Brand	Atwood
Model	AFMD30
Category	Furnace
Language	English