Atwood 8520 Panduan Instalasi Teknis - Halaman 4

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This furnace is designed for negative ground 12 volts DC only.

attempt to alter furnace for a positive ground system or connect the

furnace directly to 120 volts AC. Damage to furnace components will

occur and warranty will be voided.

Use a minimum of 18 GA wire to minimize voltage drop. Furnace must

be installed so electrical components are protected from water. To

make electrical connections see wiring diagram

1. Route wiring to left side of furnace.

2. Connect red wire to positive side of power supply.

3. Connect yellow wire to grounded side of power supply.

4. Connect blue wire marked positive thermostat to + side wire of ther-

mostat using 22-18 GA stranded wire.

5. Connect other blue wire to other thermostat lead using minimum

22-18 GA stranded wire.

For best furnace performance when power supply is from a converter

equipped with a charging port, wire converter to furnace parallel with

battery. This provides consistent voltage to furnace, increasing compo-

nent life, filtering power surges and AC spikes.

Each model with door is shipped with a standard field harness connec-

tion with 12˝ wire leads. An optional field harness with a double end is

available in bulk FIG 15 #55. This harness contains 12˝ leads, a four

pin housing, and standard six pin housing

: All units are supplied with a power switch which when turned off

NOTE

or servicing will remove power through furnace wiring. Switch

must be in ON position for furnace to operate

POWER SUPPLY

Atwood Mobile Products highly recommends the use of an electronic

(solid state) converter with clean, clear power output. This will assure

the life of the electronic controls and motor life could be extended as

much as 500% beyond typical linear converter applications.

THERMOSTAT INSTALLATION

The thermostat is very sensitive.

Locate thermostat 48˝ to 54˝ above floor on an

areas of abnormal heat or cold.

spacer between thermostat and exterior wall.

Follow manufacturer's installation instructions provided with thermo-

stat. When thermostat is not supplied, use a thermostat rated for 12

VDC or 24 VDC minimum 1 AMP.

DOOR INSTALLATION

(

FIG

CARBON MONOXIDE POISONING

Properly seal door to prevent carbon monoxide from entering coach.

•

HORIZONTAL

VERTICAL INSTALLATION

(

10) or

NOTE

STANDARD DOOR

FIG

or with optional

RECESSED BEZEL

1. Pull furnace forward until mounting tabs protrude through exterior

wall. The edge of control box is flush with coach's outer skin, (

- with gas connection on bottom).

CAL

2. The door bezel must fit tightly, to prevent water leakage.

: The furnace must always be installed level (front to back, side

NOTE

to side) to prevent water intrusion into the interior.

3. To prevent moisture from entering inside of coach, apply RTV type

sealant to the following areas:

HORIZONTAL

VERTICAL INSTALLATION

entire mounting surface of door bezel, making sure caulking is tight

•

against inner flange of bezel.

fill tab slots with caulking after bending tabs over, securing with screws.

•

- YOU MUST CALK -

VERTICAL INSTALLATION

around red gas inlet plug (slide plate and casing bottom intersect).

•

around back slide plate where it joins metal casing.

•

14.

FIG

10-F

FIG

1-D.

FIG

HANDLE WITH CARE AT ALL TIMES

wall away from

INTERIOR

wall location must have a 3/4˝

EXTERIOR

9-11)

WARNING

(

9) may be used alone

DELUXE DOOR

FIG

(

11).

FIG

around gas line where it enters gas inlet plug.

DO NOT

•

along welded joints of two bottom corners of casing.

•

4. The inlet plug and slide plate must be in closed position and bezel

flange inside of casing. Insert six mounting tabs through slots pro-

vided in bezel, bezel must be tight against casing and cutting into

RTV sealant on bezel.

5. Bend tabs flush with door bezel, aligning holes in tabs with slots in

door bezel.

6. Install 12 mounting screws.

7. Remove excess sealant from around door bezel and visually inspect

door bezel to make sure it is completely sealed.

8. Secure mounting legs on the back of the unit to floor for horizontal

installation. For vertical installation secure legs to a vertical member

that is attached to floor. Seal around slide plate, gas plug and joint

between control box right side and back wall.

OPTIONAL INSTALLATION

1. Position and secure mounting brackets to door framing on each side of

opening, allowing 5/16˝ from end of bracket face to outside of coach.

2. Pull furnace forward until edge of control box is flush with recess

pan, with mounting tabs protruding through exterior wall.

3. Insert recess bezel and door bezel until furnace tabs go through

notches on door bezel. RTV type sealant must be applied to entire

back flange of both parts creating a water tight seal. Secure to

mounting brackets.

4. Fasten recess bezel and door bezel to brackets with three screws on

each side. Do not deform recess bezel or door bezel.

5. Bend tabs over and secure with six screws. Fill tab slots with RTV

type sealant after installing furnace.

DRAFT CAP ASSEMBLY

CARBON MONOXIDE POISONING

Properly adjust draft cap to prevent carbon monoxide from enter-

•

ing coach.

With wing nut 12-C loose on draft cap assembly, close door 12-A and

adjust draft cap 12-D. The draft cap assembly must be pulled out tight

gainst door screen 12-B. Open door 12-A and tighten wing nut 12-C.

OPTIONAL FURNACE INSTALLATION

RECESSED FURNACE -

Only intake and exhaust portion of furnace is viewed from exterior of

coach when furnace is installed.

Furnace must be removable for service.

•

All 65 in

return air should be taken from interior of coach.

•

Areas to be sealed.

Coach access door butting against furnace pan cover.

•

Bottom edge of cut out section in metal pan cover.

•

Draft cap assemblies to be maintained tight against the coach

•

outside compartment doors where intake screens will be mounted.

VERTI

INSTALLATION OF DRAFT CAP ASSEMBLY

•

. Draft Cap assembly must over lap 1.25˝ inside

EXHAUST TUBE

exhaust tube.

1. Remove four (4) outside tabs located on control box. Leave two (2)

center tabs to mount door. Bend these two center tabs toward inside

of control box area 90˚, as close to control box as possible, to main-

tain a good seal. Install two fastening clips provided.

2. Install furnace in coach as close to outer compartment door as pos-

sible. Furnace must maintain a pressure seal against gasket on

screen to prevent flue products and water leakage from entering

interior of coach.

3. Connect gas line to right side of furnace. Tighten gas fitting using

two wrenches. Attach electrical wiring to left side of furnace. Attach

red wire to positive connection and yellow wire to negative. Attach

two blue wires to the thermostat wires.

deform bezel.

DO NOT

RECESS BEZEL

(

12)

FIG

WARNING

FIG

INSERT

DO NOT PULL COMPLETELY OUT OF