Table Of Contents - Atwood AFSAD12111 Instruction Manual

CARBON MONOXIDE POISONING
Properly seal vent assembly to prevent carbon monoxide from entering
coach.
 DO NOT draw combustion air from living area.
 DO NOT vent exhaust air into the living area or an enclosed porch.
CARBON MONOXIDE POISONING
 Furnace must be installed and vented to these instructions.
 Improper
installation, adjustment,
maintenance can cause injury or property damage.
Improper installation location may cause furnace to produce negative
pressure, affecting combustion air or venting of other appliances.
CARBON MONOXIDE POISONING

Properly seal door to prevent carbon monoxide from entering
coach.

Properly adjust draft cap to prevent carbon monoxide from
entering coach.
Model Nomenclature
AF M D 25
Cabinet Input
Voltage
Size Btu/hr
D=12 12K
S=small
VDC 16K
Atwood
A=120 20K
Furnace M=medium
VAC 25K
30K
L=large
35K
SA=small
40K
low amp
Contents
SPECIFICATIONS ................................................................... 2
MODEL Table 1 ............................................................................. 2
DUCTING CONFIGURATION Table 2 ........................................... 2
DIMENSION Table 3 ..................................................................... 2
MINIMUM CLEARANCE TO COMBUSTIBLES: Table 4 .............. 2
INSTALLATION AND SAFETY CODES.................................. 3
GENERAL FURNACE LOCATION AND INSTALLATIONS ... 3
FURNACE INSTALLATION ..................................................... 3
WALL CUTOUTS Table 5 ............................................................. 3
SMALL VENT INSTALLATION ................................................................ 3
STANDARD DOOR INSTALLATION ....................................................... 4
INTERIOR GRILL INSTALLATION .......................................................... 4
FLEXIBLE DUCTING SYSTEMS .............................................................. 5
PROPANE GAS CONNECTION .............................................. 5
ELECTRICAL CONNECTIONS ............................................... 5
THERMOSTAT INSTALLATION ............................................. 6
OPERATING INSTRUCTIONS ................................................ 6
WIRING AND LADDER DIAGRAM .......................................... 7
PART DRAWINGS & PART LISTS ......................................... 8
WARNING
WARNING
alteration, service
WARNING
1 1 1
Gas
Gas
Fitting Valve
Type
or Style
1=Inside 1
1=LP
Door Single
2=Outside
2=LP/NAT 2 Stage
LD
SPECIFICATIONS
MODEL Table 1
AFSD12111
Models #
AFSD12121
Type of
LP/Propane
Gas
BTU Input
BTU
Output
Duct Static
0.10"WC
Pressure
12 Volt
Amperage
or
(AMPS)
Power
Supply
(Volt DC)
Watts
Minimum
Return Air

(WC = WATER COLUMN)
DUCTING CONFIGURATION Table 2
Models
Side Ducting
Front with Side
Ducting
A Front Only no
Side Ducts
Model
Rev
DIMENSION Table 3
Approx. Dim.
Casing
A
Vent (LD)
Door
Interior Grill
Trim Ring
MINIMUM CLEARANCE TO COMBUSTIBLES: Table 4
Floorboards, walls & similar combustible building materials
must be provided the full length and width of the unit.
clearances Top
Vertical /
1/2"
Horizontal

Spacing of 1/4" to ducting within 3 feet of furnace must be provided
unless UL listed wire bound vinyl ducts are used. All ducting material
must be rated for continuous use at minimum of 200°F.

Clearances are specifically for plywood or similar building materials
surrounding the furnace (i.e. Furnace should not be located under
furniture or in a closet space where clothing or other material could be
located).

Furnace efficiency rating is a thermal rating determined under
continuous operating conditions, independent of any installation.
Efficiency rate is given at 76% minimum; actual efficiency rating may
be higher.

Return air is supplied through openings or around the furnace. All
return air passages must be kept clear for furnace to function properly.
Refer to Minimum clearance to floorboards, walls & similar combustible
building material in Table 4.

The total unobstructed return air opening size must not be less than
specified in specification Table 1. Failure to meet minimum return air
requirements nullifies furnace warranty.

To install without adding the additional 16 sq. in. cutout on the blower
side supply the right side of unit (blower side) with 2" clearance full
length of the unit.
2
AFSD16111 AFSD20111
AFSD16121 AFSd20121
LP/Propane LP/Propane
12,000 16,000 18,000
9,120 12,160 13,680
0.10"WC 0.10"WC
3.4 3.4
12 12
41 41
2 2
35 in 35 in 35 in
AFSD12 AFSD16
2 Ducts 2 Ducts
1 or 2 1 or 2
Ducts Ducts
Front Front
Height Width Depth
7" 12" 20"
4-5/8" 6-5/16" 1-1/6"
Furnace 21 lbs
1/2"
9-3/4" 14-3/4"
12-1/2" 8-1/2" 1/2"
10-1/8" 14-1/8" 1/8"
Bottom (to
Sides Rear
heads)
1/2"
1/2"
AFSAD12111
AFSAD12121
LP/Propane
12,000
9,120
Non ducted
4.8 2.4
12 12
56 34
2 2
35 in
AFSD20 AFSAD12
2 Ducts N/A
1 or 2
N/A
Ducts
Front Front
Weight
Boxed 24 lbs
Blower (side
screw opening)
0"
36 sq. in.