Table Of Contents; Specifications; Models Table 1; Ducting Configurations Table 2 - Atwood AFMD16 Technical Installation Manual

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Table of Contents
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, alteration, service or 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
Atwood
Cabinet
Voltage
Input
Furnace
Size
Btu/hr
M=medium
D=12
12K
VDC
16K
20K
25K
30K
35K
40K
Contents
SPECIFICATIONS ..................................................................... 2
MODELS Table 1 ............................................................................. 2
DUCTING CONFIGURATIONS Table 2 ........................................... 2
DIMENSIONS Table 3 ...................................................................... 2
INSTALLATION AND SAFETY CODES.................................... 3
FURNACE INSTALLATION ....................................................... 3
SIDEWALL CUTOUT ................................................................. 3
SMALL VENT INSTALLATION ........................................................ 4
STANDARD DOOR INSTALLATION ............................................... 4
FLUSH DOOR INSTALLATION ....................................................... 4
DUCTING OPTIONS .................................................................. 5
FLEXIBLE DUCTING SYSTEMS ...................................................... 5
HARD DUCT FLOOR SYSTEMS...................................................... 5
FLEX ADAPTER PLATE .................................................................. 5
AIR FLOW CHECK .................................................................... 6
PROPANE GAS CONNECTION ................................................ 6
ELECTRICAL CONNECTIONS ................................................. 6
THERMOSTAT INSTALLATION ............................................... 6
OPERATING INSTRUCTIONS .................................................. 7
TO SHUT DOWN ....................................................................... 7
WIRING AND LADDER DIAGRAM ........................................... 8
PART DRAWINGS & PART LISTS ........................................... 9
WARNING
WARNING
WARNING
1
1
1
Gas
Gas
Valve
Type
Location
1=LP
1=door
1
2=LD (small
Single
vent)
3=door w/
rear gas
fitting
4=door
w/connector
5=door w/
connector &
rear gas
fitting

SPECIFICATIONS

MODELS Table 1

Models
Type of
Gas
BTU Input
16,000
BTU
12,160
Output
Duct Static
.20" WC
Pressure
Amperage
(AMPS)
Watts
Power
Supply
(Volt DC)
A
Model Rev
Return Air
A
Minimum
Return Air
WATER
* (WC =

DUCTING CONFIGURATIONS Table 2

Model
AFMD16
Bottom
+ 1 duct
4" Duct
2 min +1
Flex or
3 min +1
Rear
Full Side
+1 duct
Notes: (two top ducts supplied are for use in addition of these
installation and are not allowed to be used alone)
 Bottom Discharge: This installation is for horizontally installed
units and can be used only with the addition of one duct any
location.
 4" Ducting: when using 4" ducting option one duct from each side
must be used. When using side ducts rear duct openings will give
the best performance and should be used whenever possible front
ducts are acceptable.
 Flex or Rear Discharge: This installation must use all three of the
rear ducts one more duct maybe added if required.
 Full Side: Full side discharge unit are for installation of the furnace
in a vertical mounting position and can be used with one additional
duct any location.

DIMENSIONS Table 3

Approx.
Casing
STD Door
FLUSH
DOOR
Vent LD

MINIMUM CLEARANCE TO COMBUSTIBLES: Table 4

Floorboards, walls & similar combustible building materials must be
provided the full length and width of unit.
clearances
Vertical /
Horizontal
2
20,000
25,000
15,200
19,000
.10" WC
.10" WC
4.2
4.2
7.5
50
50
90
12
12
12
2
2
2
80 in
80 in
80 in
2
2
2
65 in
65 in
65 in
COLUMN)
AFMD20
AFMD25
+ 1 duct
+ 1 duct
2 min +1
3 min +1
3 min +1
3 min +1
+1 duct
+1 duct
Width
Height
16-1/2"
7"
19-1/4"
9-3/4"
19-3/8"
10-1/4"
4-3/4"
6-5/16"
Bottom (to
Top
Sides
Rear
screw heads)
1/2"
1/2"
1/2"
30,000
34,000
22,800
25,840
.10" WC
.10" WC
7.5
11.1
90
132
12
12
2
2
80 in
80 in
2
2
65 in
65 in
AFMD30
AFMD35
+ 1 duct
+ 1 duct
3 min +1
3 min +1
3 min +1
3 min +1
+1 duct
+1 duct
Depth
Weight
20"
Furnace
26lbs.
3/4"
Boxed
7/32"
29 lbs.
1-1/16"
Blower (side
opening)
0"
36 sq. in.

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