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ページを印刷するPERSONAL INJURY
All sheet metal edges are sharp care should be taken when
handling or brushing up against them.
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
AF
L=large
D=12
35K
VDC
A=120
40K
VAC
Contents
MODEL NOMENCLATURE ..................................................... 2
MODEL SPECIFICATIONS ..................................................... 2
DIMENSIONS ........................................................................... 2
INSTALLATION AND SAFETY CODES.... Error! Bookmark not
defined.
INSTALLATION CODES ................ Error! Bookmark not defined.
GENERAL FURNACE INSTALLATIONS ................................ 3
CLEARANCE TO COMBUSTIBLES ............................................. 3
REQUIRED DUCTING ................................................................... 3
REQUIRED DISCHARGE .............................................................. 4
FLEXIBLE DUCTING ................................................................................ 4
CAUTION
WARNING
WARNING
WARNING
1
1
1
Gas
Style
Valve
Type
1=LP
1=door
1=
Single
2=LP/NAT
2=LD (small
vent)
3=door w/
rear gas
fitting
4=door
w/pigtail
5=door
w/pigtail
rear gas
fitting
AIR FLOW CHECK ....................................................................... 4
FURNACE INSTALLATION .................................................... 4
SIDEWALL CUTOUT .................................................................... 4
WALL CUTOUT ....................................................................... 4
SMALL VENT INSTALLATION ..................................................... 5
FLUSH DOOR INSTALLATION .................................................... 5
HARD DUCTING SYSTEMS ......................................................... 5
HORIZONTAL FLOOR DISCHARGE CUTOUT ............................ 6
GAS CONNECTION ...................................................................... 6
CONVERTIBLE GAS CONTROL ............................................ 6
VALVE CONVERSION .................................................................. 7
ORIFICE REPLACEMENT ............................................................ 7
ELECTRICAL CONNECTIONS ............................................... 7
12 VOLT DC WIRING .................................................................... 7
120 VOLT AC WIRING .................................................................. 8
THERMOSTAT INSTALLATION ............................................. 8
OPERATING INSTRUCTIONS ................................................ 8
TO SHUT DOWN ........................................................................... 9
IGNITION CONTROL DIAGNOSTIC CODES ......................... 9
MODEL SPECIFICATIONS
Models
BTU Input
Duct Static
Pressure
Amperage
(AMPS)
Watts
Power Supply
Recommended
Return Air
Minimum Hard
A
Duct Return Air
Model
Minimum
Rev
Discharge Air
A
Type of Gas
(WC = WATER COLUMN)
* 20 AMP DECATATED CIRCUIT TO THE FURNACE
DIMENSIONS
All Models
Casing
Door
Recess Bezel
LD Vent
INSTALLATION AND SAFETY CODES
USA and Canada - follow all applicable state and local codes in
the absence of local codes or regulations, refer to current
standards of:
ANSI/NFPA 1192 Recreational Vehicles Code and ANSI/RVIA LV
Low Voltage Systems in Conversion and Recreational Vehicles
CSA Z240.4, Gas-Equipped Recreational Vehicles and Mobile
Housing
National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149
This furnace must be installed in accordance with the
manufacturer's instructions and the manufactured Home
Construction and Safety Standard, Title 24 CFR, part 3280, or
2
AFLD35
AFLD40
AFLD35
35,000
40,000
35,000
.10" WC
.10" WC
.10" WC
12.5*
12.5*
138
138
12VDC
12VDC
120VAC
2
2
80 in
80 in
80 in
2
2
65 in
65 in
65 in
2
2
48 in
48 in
48 in
Propane
Propane
Propane
LP &
LP
LP
Natural
Width
Height
Depth
20"
16-1/2"
9"
1/4"
19-1/4"
9-1/4"
3/8"
20-9/16"
11-1/2"
5"
1"
5-3/8"
AFLD40
40,000
.10" WC
2.5
2.5
154
154
120VAC
2
2
80 in
2
2
65 in
2
2
48 in
Propane
LP &
Natural
Gas
Gas
Weight
Furnace 39
lbs
Boxed 46
lbs