Atwood AFLD40 Технічний посібник з монтажу - Сторінка 8

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

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

NOT 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 the minimum wire size show in the table above to minimize

voltage drop. Furnace must be installed so electrical components are

protected from water. To make electrical connections see attached

wiring diagram specific to furnace model.



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

component life, filtering power surges and AC spikes.



Some models are shipped with a field harness connections with 12"

wire leads. An optional field harness with a double end is available in

bulk. This harness contains 12" leads, four-pin housing, and standard

six-pin housing.



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

servicing will remove power through furnace wiring. Switch must be on

in the ON position for furnace to operate.



The direct high voltage spark ignition generates a radio frequency that

could cause interference with other microprocessor-based equipment.

Locate equipment at least five feet (5') from furnace location. If this

distance cannot be maintained, Atwood has a kit which can be

purchased. See parts list.

Route wiring to the furnace.

Furnace

Red Wire +12 Volt DC

Black Wire -12 Volt DC

Blue Thermostat +12VDC

Blue Thermostat

Wiring for thermostat using 22 minimum AWG stranded wire.

All wiring must be installed so the electrical components and

connection are protected from water.

If a unit is supplied with a connector block on the field connections

the mating parts should be used.

Furnace Connector

AMP 1-480705-0

Furnace Terminals

AMP 7708496

120 VOLT AC WIRING



Furnaces are equipped with a 120 volts AC motor. All other

electrical component parts are supplied with power from a

transformer inside the furnace at 24 volts AC.



A 120 Volt model can also be supplied with a 30 inch power cord

from the factory supplied with a molded plug with ground pin.



AC units have a power switch located in the valve circuit leg only.

This switch will not remove the power from the 120 volts incoming

line. Make sure that power has been turned off before servicing.



Switch must be in the "ON" position for the furnace to operate the

valve.

PROPERTY DAMAGE

This furnace is designed for 120 volts AC only. DO NOT attempt to

alter furnace system or connect to 12 volts DC.

Route 120 volts AC and thermostat leads to wires located on the left

side of control box using a minimum of 18 GA wire. The furnace must

be installed so electrical components are protected from water. To

make electrical connections see wiring diagram.

Route wiring to left side of furnace.

Remove junction box cover (some units come with pre-wired

cords for connection directly to a 120 volts AC outlet).

Connect 120 white wire to furnace 120 white wire.

Connect 120 black wire to furnace 120 black wire.

Power Supply

+12 Volt DC

-12 Volts (Ground)

+12 Volts (Thermostat)

-12 Volts (Thermostat)

Field Connector

AMP 1-480704-0

Field Terminals

AMP 770020-1

CAUTION

Connect ground wire to furnace green ground wire (after

connections are made put wire connections into furnace junction

box and replace cover).

Connect thermostat leads to the two blue furnace thermostat

leads using minimum 22-18 GA stranded wire.

THERMOSTAT INSTALLATION



Purchase a thermostat rated for 12 VDC or 24 VAC, Minimum 1

AMP rating.



Be sure all electrical power to the furnace is disconnected.



The thermostats are very sensitive, HANDLE WITH CARE AT

ALL TIMES.

Pick a dry area where air circulation is good.

Do not install the thermostat where there are unusual heating

conditions: such as direct sunlight, heat producing appliances

(television, radio, wall lamp, etc.) or a furnace or air conditioner

output registers.

Locate thermostat 48" to 54" above main living area floor on an

INTERIOR wall when possible

EXTERIOR wall location must have a 3/4" spacer between

thermostat and exterior wall.

Follow manufacture's installation instructions provided with

thermostat.

OPERATING INSTRUCTIONS

FIRE OR EXPLOSION

Do not operate furnace while vehicle is in motion or being towed.



During initial firing of this furnace, a burn-off of excess oils

remaining from manufacturing process may cause smoking or

fumes for 5-10 minutes.



NOTE: if furnace should lock out, the blower will go off in 3

minutes and remain off until unit is reset by reactivating the

thermostat.

STOP! Read Users Information Manual supplied with furnace.

Turn the manual valve (if so equipped) or the valve at the outside

LP tank to the "OFF"" position. Do not force.

Set thermostat above room temperature to begin blower

operation. A slight delay will occur before the blower comes on.

Allow blower to run for 1 minute for combustion chamber purge

cycle. If blower does not come on or stops before ignition cycle,

go to shut down and contact your dealer or a local recreational

vehicle service agency.

After 1 minute, move thermostat lever below room temperature.

Blower will remain on. Wait approximately 2 minutes for blower to

go off.

Open manual shut-off valve (if so equipped) or the valve at the

outside LP tank. Correct operation characteristics depend on the

valve being positioned fully open. Never attempt to operate with a

valve partially closed. NOTE: This furnace is equipped with a

valve shut-off switch with switch in "OFF" position. Gas will not

flow to burner nor will the furnace operate. Turn switch to "ON"

position.

Set thermostat level to desired setting. If set above room

temperature, blower will come on.

Allow 30 seconds for main burner to light after blower comes on.

This furnace is equipped with an ignition device which

automatically lights the burner. DO NOT try to light the burner by

hand.

If burner does not light, repeat Steps 1 through 7.

If after three (3) attempts with no ignition, go to shut down and

contact your dealer or a local recreational vehicle service agency.

Do not continue to cycle furnace through thermostat in an attempt

to get ignition. NOTE: If furnace should lock out, the blower will go

off in 3 minutes and remain off until unit is reset by reactivating

the thermostat.

WARNING