8900 Series Model Identification; Wiring Diagrams 8900 Models - Atwood AFS Series Training Manual

8900 SERIES Model Identification

8900 Series Model Identification
MODEL DESCRIPTION
89 Series
BTU/Hr Rate (input)
35=34,000
40=40,000
Voltage
DC= 12 Volt
AC=120 Volt
Gas Type
LP=Propane
LP/NAT=Propane
Natural Gas
Gas Connection
6=3/8" Flare
Thermostat
W=with
W/O= with out
Applications – This unit is typically installed in travel trailers, 5
Installation – This series of furnace can be installed either vertically or horizontally (there is only one vertical installation
option with use only with specific flexible ducting locations). If installed vertically, the exhaust port must
be located at the bottom. Extra care must also be given in sealing this type of installation. Consult the
installation manual for details.
Heat Outlets – This furnace can be bottom discharged to a hard duct system, soft ducted out the back to a discharge
plate into a hard duct system or completely soft ducted from a combination of the six outlets located on
both sides and back of the furnace. Refer to the installation manual for the ducting requirements of the
specific model of furnace.
Serviceability - This entire furnace is serviceable without removing it from the RV when installed with the outer door
option. Therefore, there is no need to bench test it. All components are accessible by merely opening the
access door. We strongly recommend trouble-shooting the furnace while it is installed in the RV.
Power Consumption – The DC furnace is designed to draw 11.0 amps and the AC model draws 3.2 amps. Refer to the furnace
specification decal when trouble-shooting its electrical system.

Wiring Diagrams 8900 Models

If any original wire has to be replaced, it must be replaced with type 105°C or its equivalent. Note: Wire colors may be different then original wiring.
85 12 DC LP
th
wheels and motor homes.
IMPORTANT
20
SB W