RV Products 8535 SERIES Installation manual

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RV Products 8535 SERIES Installation manual | Manualzz

ENGLISH, FRANCAIS

(et Canada)

THIS INSTRUCTION MANUAL IS FOR USE BY AN AUTHORIZED SERVICE

TECHNICIAN TO INSTALL AN ATWOOD

- hydro flame

TM FURNACE

.

TO THE INSTALLER

:

THESE INSTRUCTIONS MUST BE SUPPLIED WITH THE FUR

-

NACE TO THE CONSUMER

.

TO THE CONSUMER

:

PLEASE RETAIN THESE INSTRUCTIONS FOR FURTHER REFER

-

ENCE

.

This furnace design has been certified for installation in recreation vehicles as a MSP Category III furnace. Follow this installation instruction to insure safe operation of the furnace. Failure to install furnace according to this installation instruction nullifies the furnace warranty.

SAFETY ALERT SYMBOLS

Safety Symbols alerting you to potential personal safety hazards.

Obey all safety messages following these symbols.

WARNING

avoid possible injury or death

CAUTION

avoid possible injury and/or property damage

WARNING

9

FIRE OR EXPLOSION

• If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

FOR YOUR SAFETY

WARNING

FIRE OR EXPLOSION

WHAT TO DO

IF YOU SMELL GAS

• Evacuate ALL persons from vehicle.

• Shut off gas supply at gas container or source.

DO NOT touch any electrical switch, or use any phone or radio in vehicle.

DO NOT start vehicle’s engine or electric generator.

• Contact nearest gas supplier or qualified Service Technician for repairs.

• If you cannot reach a gas supplier or qualified Service

Technician, contact the nearest fire department.

DO NOT turn on gas supply until gas leak(s) has been repaired.

Installation and service must be performed by a qualified

Service Technician, Service Center or gas supplier.

LITERATURE NUMBER

MPD 33179

hydro flame

TM

8500-IV Series Furnace

MODELS 8516, 8520, 8525,

8531, 8535

Technical Installation Manual

•Installation •Maintenance

Effective 1/08

INDEX

FURNACE SPECIFICATIONS ..............................................................

1

DIMENSIONS

WEIGHT

..................................................................

1

........................................................................

1

MINIMUM CLEARANCE TO FLOORBOARDS

,

WALLS

,

& SIMILAR COMBUSTIBLE BUILDING MATERIALS ..................................

2

SAFETY INFORMATION ..................................................................

1-2

FURNACE INSTALLATION ..................................................................

2

WALL CUTOUTS

..........................................................................

2

DUCTING

................................................................................

2-3

Required Minimum Discharge Chart ............................................

3

Flexible Ducting ......................................................................

3

Floor Ducting ........................................................................

3

OPTIONAL INSTALLATION

-

BOTTOM DISCHARGE KIT

..................................

3

OPTIONAL INSTALLATION

-

EXTENSION BOX KIT

......................................

3

OPTIONAL INSTALLATION

PROPANE GAS CONNECTION

-

FLEX ADAPTER KIT

........................................

3

............................................................

3

ELECTRICAL CONNECTIONS

..............................................................

3

Conductor Sizing Table

Thermostat Installation

............................................................

3

............................................................

4

DOOR INSTALLATION

....................................................................

4

Horizontal and Vertical Door Option ............................................

4

Recess Bezel Door Option

DRAFT CAP ASSEMBLY

........................................................

4

..................................................................

4

OPTIONAL FURNACE INSTALLATION

-

Recessed Furnace ........................

4-5

SYSTEM CHECK TESTS ....................................................................

5

PROPANE GAS PRESSURE

..............................................................

5

STATIC PRESSURE

........................................................................

5

DC WIRING DIAGRAM ......................................................................

5

ILLUSTRATIONS ............................................................................

6

REPLACEMENT PARTS LIST & DRAWING ..............................................

7

SPECIFICATIONS

MODEL

#

(W.C. = Water Column)

8516-IV 8520-IV 8525-IV 8531-IV 8535-IV

BTU Input

Duct Static Pressure

12 Volt Amperage (AMPS)

Watts

Power Supply (

VOLT DC

)

Recommended Return Air

MINIMUM RETURN AIR

16,000 20,000 25,000 30,000 34,000

.20˝ W.C.* .10˝ W.C.* .10˝ W.C.* .10˝ W.C.* .10˝ W.C.*

4.6

4.6

7.6

7.6

9.8

55

12

80 in 2

55

12

80 in 2

91

12

80 in 2

91

12

80 in 2

118

12

80 in 2

65 in 2 65 in 2 65 in 2 65 in 2 65 in 2

DIMENSIONS

ALL MODELS WIDTH

Casing 16-1/2˝

Door

Recess Bezel

19-1/4˝

20-9/16˝

HEIGHT

7-3/8˝

9-1/4˝

11-1/2˝

DEPTH

18˝

1/4˝

WEIGHT

FURNACE

SHIPPING

30 lbs

32 lbs

1

MINIMUM CLEARANCE TO

FLOORBOARDS, WALLS & SIMILAR COMBUSTIBLE BUILDING MATERIALS*

HORIZONTAL

MUST BE PROVIDED THE FULL LENGTH AND WIDTH OF UNIT

TOP AND SIDES

------1/2˝

REAR

--1˝

BOTTOM

--3/16˝

VERTICAL TOP AND SIDES

------1/2˝

REAR

--1˝

BOTTOM

------0˝(

SLIDE PLATE

)

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 should be rated for continuous use at 200˚F.

NOTE

: Clearances are specifically for plywood or similar building materials surrounding furnace (i.e. furnace should

NOT be located under furniture or in closet space where clothing or other material could be located.)

NOTE

: Furnace efficiency rating is a thermal rating determined under continuous operating conditions, independent of any installation. Efficiency rate is given at 77% minimum, actual efficiency rating may be higher.

*When furnaces are installed to minimum clearances, an additional 16 in 2 of return air must be provided to blower side of furnace, or a 2˝ clearance the full length and height on blower side must be maintained.

WARNING

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.

CRITICAL INSTALLATION WARNINGS

• DO NOT install furnace on material that restricts return air, like carpet or any soft material such as vinyl.

• DO NOT install furnace where clearance to combustibles cannot be maintained.

• DO NOT modify furnace in any way.

• DO NOT alter furnace for a positive grounding system.

• DO NOT

HI-POT furnace unless electronic ignition system (circuit board) has been disconnected.

• DO NOT use battery charger to supply power to DC model furnace even when testing.

• DO NOT

• DO NOT use 120 volt AC current with DC models.

use furnace cabinet area as a storage compartment.

• DO NOT

• DO NOT vent furnace with venting system serving another appliance.

vent furnace to an outside enclosed porch area.

• DO NOT use for temporary heating of buildings or structures under construction.

Protect building materials from degrading from flue gas exhaust.

Protect furnace electrical components from water.

USA AND CANADA

-

FOLLOW ALL APPLICABLE STATE AND LOCAL CODES

-

IN THE ABSENCE OF LOCAL CODES OR REGULATIONS

,

REFER TO CURRENT STANDARDS OF

:

Recreation Vehicles ANSI A119.2/NFPA 501C.

National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149

Installation Codes

Federal Mobile Home Construction & Safety Standard, Title 24 CFR, part 3280, or when this Standard is not applicable, the Standard for

Manufactured Home Installations (Manufactured Home Sites,

Communities and Set-Ups), ANSI A255.1 and/or CAN/CSA-Z240 MH

Series, Mobile Homes.

Ground-National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1

Park Trailers ANSI 119.5

2

NOTE

: 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, purchase MPD 37773

(a shielded high voltage lead).

WARNING

CARBON MONOXIDE POISONING

Properly seal door, adjust draft cap (

OR ON MODELS WITHOUT DOOR

) install 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.

Return air is supplied through openings in furnace casing. All return air passages must be kept clear for furnace to function properly. Refer to

MINIMUM CLEARANCE TO FLOORBOARDS

,

WALLS & SIMILAR COMBUSTIBLE BUILDING

MATERIAL

. The total unobstructed return air opening size(s) must

NOT BE

LESS than specified in

SPECIFICATIONS

-

MINIMUM RETURN AIR

. Failure to meet minimum return air requirements nullifies furnace warranty.

STANDARD FURNACE INSTALLATION

General Installation -

LOCATION

Install furnace through an exterior wall.

• DO NOT install furnace near tilt-out rooms, slide-outs, doors or other projections that could obstruct furnace exhaust.

Locate furnace near midpoint of coach for single furnace applications.

• DO NOT install vent in areas where projections or door openings come within 6˝ of vent tube opening.

• DO NOT install furnace in an area where wires, pipes, or other objects will interfere with installation or operation of furnace.

It is not recommended to install furnace on material that restricts return air, such as directly on carpet, or soft material (like vinyl).

If you must install furnace on carpet or soft material, install furnace on cleats, or on a wood or metal panel extending the full width and depth of furnace plus minimum clearances to combustibles.

DO NOT use petroleum or citrus type cleaners on plastic parts, as damage may occur.

WALL CUTOUT OPTIONS

RECOMMENDED WALL THICKNESS

1-1/2˝ to 2-1/2˝

DO NOT OVERSIZE HOLE

-

OVERSIZING CAN RESULT IN WATER LEAKAGE

EXTERIOR WALL CUTOUT

HORIZONTAL

(

FIG 1 )

VERTICAL

(

FIG 2

)

A

17˝

7-1/2˝

B

7-1/2˝

17˝

C

19˝

19˝

RECESS BEZEL ( FIG 1 ) 19-1/2˝ 10˝ *

*

RECESS BEZEL

:To cut rounded corners: with radius blocks 2-1/8˝ radius without radius blocks a 45˚ angle

CAUTION

PERSONAL INJURY

• DO NOT allow furnace tabs to protrude through side wall cutout opening during installation process until door is installed and tabs are bent over. Tabs have sharp edges.

ALL OPTIONS

: Place furnace in cavity.

DO NOT have tabs protrude outside exterior wall until door is ready to be installed.

DUCTING

(

FIG 4-7 )

Proper duct installation is critical to operation of furnace. When installing ducts, use materials rated for continuous use at 200˚F.

HORIZONTAL INSTALLION

-

USING SIDE DUCT OPTIONS

- must have a minimum of one duct from both left and right side of casing.

Required Minimum Discharge - (also see

STATIC PRESSURE TEST

)

MODELS REQUIRED DISCHARGE

8516-IV, 8520-IV ............................................................24in

2

8525-IV & 8531-IV ........................................................36in

2

8535-IV ..........................................................................48in

2

ALL MODELS

-

TOP OR BOTTOM DISCHARGE SYSTEMS

..................48in

2

8525-IV, 8531-IV, 8535-IV

VERTICAL INSTALLATION

..............48in

2

(

EXCEPT WHEN USING THE THREE REAR DUCT OPENINGS OR MODELS WITHOUT DOOR

)

• See

MINIMUM CLEARANCE TO FLOORBOARDS

,

WALLS & SIMILAR COMBUSTIBLE

BUILDING MATERIALS

.

• Each 4-inch duct opening provides 12 in an extra 12 in 2

2 of discharge area. Provide of non closeable duct discharge area for each closeable register used.

Use of 2˝ ducts does not count toward achieving minimum discharge requirements. Ducting in dead air space with no return air, such as holding tank areas, does not count toward achieving minimum discharge requirements.

Adjust ducting installation to obtain air rise of 100˚F-130˚F.

Flexible Ducting Systems

When designing Flexible Duct Systems:

• avoid sharp bends or crushed ducts

• stretch all ducts and run them directly to outlets, keeping quantity and angles of bends to a minimum

1. Remove knockout plates from desired outlets.

2. Attach a duct adapter to each opening, by inserting flange over casing, locking the tab into casing slot and turning adapter 90˚.

3. Attach and secure FOUR INCH flexible ducts to adapters.

4. Run ducts to desired location within RV, secure to registers.

5. Additional ducting may be needed to maintain correct static pressure.

Hard Ducting Floor Systems

When designing Hard Ducting Systems:

• undersize ducting will cause high temperature limiting

• oversize ducting will cause inadequate air flow from registers

• when hard ducting is 1-1/2˝ in depth, an additional flex duct may be needed to maintain installation static requirements

DO NOT install floor registers within 2 feet of return air openings.

OPTIONAL INSTALL

-

BOTTOM / TOP DISCHARGE OR VERTICAL BOTTOM ( FIG 5 )

1. Remove bottom/top discharge cover plate. This ducting option must be connected to a ducting system. FIG 15 #4 GASKET AND

PLENUM PLATE is available when attaching furnace.

2. If cutout is required:

BOTTOM DISCHARGE

(

FIG 5

) A

8-1/4˝

FLOOR CUTOUT

B

9-1/2˝

C

6-1/4˝

D

1/4˝

3. Fasten plenum plate (5-E) over floor cutout. If a gasket and plenum plate are not used, seal furnace to hard duct system making sure seal is air-tight and continue with

STEP

5.

4. Position gasket (5-F) on plenum plate.

5. Set furnace on gasket, make sure gasket remains in position.

6. Additional ducting can be used to maintain correct static pressure.

OPTIONAL INSTALLATION

-

EXTENSION BOX KIT (

FIG 6 )

FIG 15 #7 Extension Box #7 and FIG 15 #54 Plenum Plate may be used for top or bottom discharge installation. A casing extension box adds 6˝ of depth to furnace.

(

1. Remove three knockouts from rear of furnace.

2. If cutout is required:

FIG . 6 )

EXTENSION BOX

A

18˝

B

FLOOR CUTOUT

C

1/2˝ 5˝

D

16˝

E

1/4˝

3. Place extension box with foam gasket against furnace, making sure the three openings are enclosed within extension box. With extension box held in place, secure with two 1/2˝ sheet metal screws.

3

4. Fasten plenum plate over cutout.

5. Position gasket on plenum plate.

6. Set furnace on gasket, make sure gasket remains in position.

7. Fasten extension box to floor with two 1/2˝ sheet metal screws.

8. Additional ducting can be used to maintain correct static pressure.

OPTIONAL INSTALLATION

-

FLEX ADAPTER KIT ( FIG . 7 )

A flex adapter FIG 15 #26 may be used to provide more flexibility for alignment of discharge opening on hard duct systems. This system can be used on all models installed horizontally or vertically providing ducting from rear of furnace without using side ducts.

1. Remove three knockouts from rear of furnace.

2. If cutout is required, use placement and cutout dimensions for the

EXTENSION BOX

(

FIG

. 6 ).

3. Install duct adapters (7-A) in each opening.

4. Place flex adapter plate (7-C) with foam tape against hard ducting, making sure openings line up.

5. With plate held in place, fasten plate to ducting (7-D).

6. Install three duct adapters into flex adapter plate.

7. Attach flexible ducting (7-B) from furnace to flex adapter plate and secure ducting in place.

8. Additional ducting can be used to maintain correct static pressure.

PROPANE GAS CONNECTION

( FIG . 1 )

1. Connect gas line to brass fitting on right side of furnace. Be sure all male pipe threads, other than flare fittings, are treated with a sealing compound resistant to the action of propane (LP) gas. DO NOT put sealing compound on flare fittings.

WITH DOOR ONLY

• Remove slide plate (1-E) and gas inlet plug (1-F) from furnace.

• Insert gas line (1-G) through gas inlet plug ( DO NOT CUT ).

• Connect gas line through gas inlet plug inside furnace casing immediately ahead of gas control valve.

• A 1/8˝ N.P.T. plug is accessible for test gauge connection on gas valve assembly.

2. A 3/8˝ flared fitting connection is provided at gas control valve inlet for gas supply connection to furnace. The gas supply line of the furnace must be of adequate size to provide 11˝ W.C. gas pressure.

This pressure must be maintained under maximum flow conditions with all gas appliances in operation.

3. Use two wrenches to hold brass fitting and flare nut when tightening gas line to brass fitting.

DO NOT twist valve assembly (

FIG

. 8 ).

ELECTRICAL CONNECTION

(

FIG

.

14)

WARNING

INJURY OR PROPERTY DAMAGE

Label all wires before disconnecting for servicing. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

Disconnect electrical power before servicing.

Conductor Sizing Table -

MAX

.

10% VOLTAGE DROP

-

(12 VDC )

CURRENT DRAW

(

AMPS

)

GAGE

18

16

3 4 5 6 7 8 9 10 15

MAX

.

LENGTH OF SAE CONDUCTOR

(

IN FEET

)

FROM SOURCE TO DEVICE

57 43 34 29 25 21 19

87 65 52 43 37 33 29

17

26

11

17

CAUTION

PROPERTY DAMAGE

This connection is for low-voltage battery or direct current only. Do not connect to 120- or 240- volts AC.

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 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

FIG

.

14.

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 thermostat 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 component life, filtering power surges and AC spikes.

Each model with door is shipped with a standard field harness connection 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

FIG

.

10-F

NOTE : All units are supplied with a power switch which when turned off or servicing will remove power through furnace wiring. Switch must be in ON position for furnace to operate

FIG

1-D.

• around gas line where it enters gas inlet plug.

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 provided 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. DO NOT deform bezel.

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

-

RECESS BEZEL

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.

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. HANDLE WITH CARE AT ALL TIMES .

Locate thermostat 48˝ to 54˝ above floor on an

INTERIOR wall away from areas of abnormal heat or cold. EXTERIOR wall location must have a 3/4˝ spacer between thermostat and exterior wall.

Follow manufacturer’s installation instructions provided with thermostat. When thermostat is not supplied, use a thermostat rated for 12

VDC or 24 VDC minimum 1 AMP.

DOOR INSTALLATION

(

FIG

.

9-11)

WARNING

CARBON MONOXIDE POISONING

Properly seal door to prevent carbon monoxide from entering coach.

DRAFT CAP ASSEMBLY

(

FIG

.

12)

WARNING

CARBON MONOXIDE POISONING

Properly adjust draft cap to prevent carbon monoxide from entering 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.

HORIZONTAL & VERTICAL INSTALLATION

NOTE

:

STANDARD DOOR

(

FIG

10) or

DELUXE DOOR

(

FIG

9) may be used alone or with optional RECESSED BEZEL ( FIG 11).

1. Pull furnace forward until mounting tabs protrude through exterior wall. The edge of control box is flush with coach’s outer skin, (

VERTI

-

CAL - with gas connection on bottom).

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

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

VERTICAL INSTALLATION

- YOU MUST CALK - around red gas inlet plug (slide plate and casing bottom intersect).

around back slide plate where it joins metal casing.

OPTIONAL FURNACE INSTALLATION

RECESSED FURNACE -

FIG 13

INSERT

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 2 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.

INSTALLATION OF DRAFT CAP ASSEMBLY

-

DO NOT PULL COMPLETELY OUT OF

EXHAUST TUBE

. Draft Cap assembly must over lap 1.25˝ inside exhaust tube.

4

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 maintain a good seal. Install two fastening clips provided.

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

4. Secure furnace to coach floor with four screws.

LOCATE SCREWS TO

AVOID DAMAGE TO ANY WORKING COMPONENTS

,

WHILE MAINTAINING PRESSURE

SEAL AGAINST GASKET ON SCREEN

.

CUTOUT

RECOMMENDED WALL THICKNESS

DO NOT OVERSIZE HOLE

1-1/2˝ - 2-1/2˝

-

OVERSIZING CAN RESULT IN WATER LEAKAGE

EXTERIOR WALL CUTOUT

RECESS FURNACE ( FIG 13 )

A

4-3/4˝

B

5. Place recess cover over top of furnace with all edges of door outside of control box. Hold firmly into place while using holes in door to locate mounting tabs and clips. Use #8 or #10 sheet metal screws to fasten door in place.

Follow STANDARD FURNACE INSTALLATION instructions for ducting, thermostat and draft cap assembly.

SYSTEM CHECKS

WARNING

FIRE OR EXPLOSION

Never check for leaks with an open flame.

PROPANE GAS PRESSURE TEST

The furnace and any individual shut-off valve must be disconnected from gas supply piping system during any pressure testing of system at test pressures of more than 1/2 PSI.

Before furnace is connected piping systems must be tested to be leak free. The test must maintain air pressure of at least 6˝ of mercury or 3

PSI for at least 10 minutes.

The entire piping system must be maintained within a range of 10-14˝

W.C. when all appliances are in operation. Test gas connections for leakage with a leak test solution.

STATIC PRESSURE TEST

(

FIG

.

1)

Please refer to Engineering Addendum when installing the furnace. This will provide you with allowable maximum case static pressures with each possible variation of duct configurations. The addendum is available from your Atwood Field Service Representative or by calling

Atwood Service Toll Free.

Reducing the number of duct turns and stretching the ducts will increase airflow and reduce static pressure. Adding ducts or increasing the discharge (hard duct) system will also reduce static pressure.

You must follow the manufacturer’s recommendations and specifications for optimum performance and proper operation.

DIAGNOSTIC CHART

FAULT

Internal Circuit Board Failure

Limit switch/Airflow problems

Flame Sense Fault

Ignition Lockout Fault

LED INDICATION

Steady on, no flashing

1 flash with 3-second pause

2 flashes with 3-second pause

3 flashes with 3-second pause

14

ELECTRODE

VALVE

YELLOW

GROUND

YELLOW

BLACK

RED

IGNITION

CONTROL

MOTOR

INSIDE

FURNACE

CIRCUIT

BREAKER

RED

ON/OFF

ON

SWITCH

YELLOW

BLUE

BLW PWR

RED

BLUE

2

5

1

4

3

6

2

5

1

4

3

6

+ 12V DC

NEG

+THERMO

THERMO

12V DC

SUPPLY

THERMOSTAT

YELLOW

RED

SAIL

SWITCH

WHITE

BLUE

LIMIT

SWITCH

BLUE

RED

WHITE

YELLOW

HIGH TENSION

CUSTOMER SUPPLIED WIRING

IMPORTANT: If any original wire has to be replaced, it must be replaced with type 105° C or its equivalent.

Terminal Block on 85 Models only.

5

Note: On/OFF Switch may be separate or combined with Circuit Breaker.

9

8

A

B

C

Access to Static Port

(Accès à l’orifice statique)

A

1

1-1/4"

10

1-1/4"

D

12

9

D

10

11

B

E

F

G

C

OR

OR

2

Vertical

Installation

(Installation

Verticale)

B

C

A

AVANT DU VEHICULE

6

A B

13

E

D

C

B

B

A

A

D

C

7

OR

D

F

E

C

6

4

B

5

A

VERTICAL

FOOT PRINT

OR

hydro flame

TM

57

8500-IV Series

Furnace Models 8516, 8520, 8525, 8531, 8535

52

18

42

32

20

1

47

41 3

36

49

15

30

46 51

8

48

35

28

50

56

46

45

10 14

11

19

24

43

27

6

4

23

22

26

7

54

Cut Out &

Cover Plate on Full Side

Discharge

ONLY

30

9

17 37

13

28

30

32

35

23

24

26

27

18

19

20

22

13

14

15

17

36

37

41

42

43

45

46

DRAWING

#

1

3

9

10

11

12

7

8

4

6

12

DESCRIPTION

Blower Wheel

Motor Clamp

Gasket/Plenum Plate Kit- Top & Bottom

Burner Assembly

Extension Box

ON/OFF Switch

Replacement Coil

Combustion Wheel

Door Hinges

Door, Standard

ORDER BY COLOR

Door, Deluxe SPECIFY COLOR

Slide Plate

Thermostat - specify color

Valve

Field Wiring Harness

Draft Cap Assembly - Specity model

Electronic Ignition Board

Duct Adapters

Duct Cover Plate

Electrode

Flex Adapter Plate Assembly Kit

Gas Inlet Plug

High Tension Lead

Top/Bottom/Side Cover

Limit Switch

Motor Gasket

Motor - specify rate

Orifice - specify rate

Sail Switch

Element Assembly - specify model

Exhaust Wall Gasket

Recess Pan AssemblySPECIFY COLOR

Mounting Bracket

DRAWING

47

48

54

56

57

N/S

49

50

51

52

#

DESCRIPTION

Venturi

Blower Housing Back

Blower Housing

Motor/Combustion Wall

Circuit Breaker

Control Board Mounting Bracket

Plenum Plate, Extension Boot

Door Fastener Kit

Double Housing Field Harness

High Voltage Lead - noise suppresion

N

˚

SUR LE SCHÉMA

1

3

4

DESCRIPTION

Ventilateur

Bride de fixation du moteur

Kit de joint d'étanchéité et de plaque de répartition d'air - haut et bas

8

9

6

7

Brûleur

Extension de boîtier

Interrupteur MARCHE/ARRÊT

Bobine de rechange

10

11

12

Ventilateur d'air de combustion

Charnières du panneau extérieur

Panneau extérieur, standard

DOIT ÊTRE COM

-

13

14

15

17

18

19

20

MANDÉ PAR COULEUR

Panneau extérieur, de luxe PRÉCISEZ LA

COULEUR

Plaque coulissante

Thermostat -

PRÉCISEZ LA COULEUR

Soupape

Faisceau de câblage sur place

Capuchon de refoulement

Panneau d'allumage électronique

7

22

23

24

26

27

28

30

32

35

36

37

41

42

43

49

50

51

52

45

46

47

48

54

56

57

N/S

Adaptateurs de conduit

Couvercle d'ouverture de branchement de conduit

Électrode

Plaque adapatatrice de flexibles kit

Raccord d'admission de gaz

Fil haute tension

Plaque de répartition d'air du haut, du bas et latéral

Rupteur thermique

Joint d'étanchéité du moteur

Moteur - précisez la puissance nominale

Lumière - précisez le calibre

Interrupteur à abattant

Élément de chauffage

Joint entre le système d'évacuation et la paroi

Cadre de fondPRÉCISEZ LA COULEUR

Support de fixation

Pavillon d'aspiration

Arrière du boîtier du ventilateur

Boîtier du ventilateur

Paroi moteur/ventilateur d'air de combustion

Coupe-circuit

Support de fixation du tableau de commande

Plaque de répartition d'air, Extension de b oîtier

Kit de fermeture du panneau extérieur

Queue de cochon double

Fil haute tension – suppression du bruit

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