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Model Identification - Atwood 79 Series Service Manual

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MODEL DESCRIPTION
Model
BTU/Hr Rate (Input)
35 = 35,000
40 - 40,000
Voltage
DC = direct current 12 Volts
AC = 120 Volts(120 VAC)
Type Gas
LP = Propane
LC = set at factory for propane but field
changeable to natural
NC = set at factory for natural but field
changeable to propane
Gas connection size
6 = 3/8" Flare
Applications - This unit is typically installed in large travel trailers, 5th wheels, motor homes and park model trailers.
Installation - The 89 series furnace must only be installed horizontally.
Options - As the chart above indicates, this furnace can be purchased to operate on 12VDC or 120VAC with LP gas or Natural
gas. Natural gas option is only available on AC models.
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. 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 version of this furnace is designed to draw approximately 11.0 amps. This is important when
trouble-shooting the motor of this furnace.
MODEL DESCRIPTION
Model
BTU/Hr Rate (Input)
Low 23 = 23,000
High 34 = 34,000
Voltage
DC = direct current 12 Volts
Type Gas
LP = Propane
Gas connection size
6 = 3/8" Flare
8 = 1/2" Flare
Packing
SP = Single Pack
BP = Bulk Pack (layers of 4)
89 Series Model Identification
89
35 DC
2-stage Model Identification
23
34
LP
6
DC
LP
6
BP
7

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