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20

IGNITOR

INDUCER

GAS

VALVE

SUPPLY AIR

LIMIT SWITCH

(ALL MODELS)

VENT

SAFETY SWITCH

(SELECT

MODELS ONLY)

TRANSFORMER

FLAME SENSOR

C

GREEN

BLACK

WHITE

BLUE

BLUE

24 V

120 V

ORANGE

BLUE

BLUE

YELLOW

BROWN

RED

BLACK

WHITE

ORANGE

BLUE

BLACK

ORANGE

BLACK

RED

AIR CONDITIONER
CONDENSING UNIT

BLACK

BLACK

BLOWER DOOR
SWITCH

R

WHITE

BLACK

WHITE W/ BLK STRIPES

BLK W/ WHITE STRIPES

WHITE (NEUTRAL)

BLACK 120V

GROUND

ROOM THERMOSTAT

3 OR 4 SPEED MOTOR

H

MH

ML

L

C

WHITE 

RED

ORANGE

BLUE

BLACK

MOTOR

PLUG

1

2

3

4

5

6

BLACK

BLUE

FLAME ROLL-OUT

SWITCH

(ALL MODELS)

VENT

PRESSURE SWITCH

(93+ MODELS ONLY)

PRESSURE

SWITCH

R

Y

G

W

C

Y

180

120

90

60

These wires are

not present

on all models

BLOWER

DECK SWITCH

(SELECT

MODELS ONLY)

Legend

Field Wiring

Factory Wiring:

Low Voltage
High Voltage

Power On

Limit Circuit Open or External Load On "W"

Pressure Switch is Open with Inducer On

Pressure Switch is Closed with Inducer Off

Ignition Failure (Check Ground)

115 VAC & Neutral Reversed or  no Ground

False Flame or Gas Valve Relay Shorted 

ON 

1 FLASH

2 FLASHES

3 FLASHES

4 FLASHES

5 FLASHES

Continuous

STATUS

RED 

LIGHT

FAULT CONDITION

Power Off

Low Flame Sensor Signal

Flame Present

Continuous

Flash

OFF

ON

FLAME

YELLOW 

LIGHT

FAULT CONDITION

BLUE

FLAME

ROLL-OUT SWITCH

(SELECT

MODELS ONLY)

Refer to the Installation
Instructions provided 
with the furnace for the
proper heating and
cooling speeds for your
application.

VENT SAFETY SWITCH
(SELECT MODELS ONLY)

If any of the original
wire as supplied with
the furnace must be
replaced, it must be
replaced with wiring
material having a
temperature rating of
at least 105° C.

Use copper
conductors only.

WD#710355

Figure 13.  Wiring Diagram

Summary of Contents for RA 80+ series

Page 1: ...property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Donottrytolightan...

Page 2: ...ication 15 Pressure Switch Conversion for High Altitude Applications 15 Natural Gas High Altitude Conversion 15 LP Propane Gas Sea Level and High Altitude Conversion 15 Electrical Wiring 16 General 16...

Page 3: ...s as specified on Page 14 of these instructions 6 Always install furnace to operate within the furnace s intended temperature rise range with a duct system which has an external static pressure within...

Page 4: ...52 1240 54 1175 57 1210 55 1195 55 1180 56 1160 57 1135 59 1100 60 1060 63 1010 66 2375 28 2320 29 2280 30 2215 30 2150 31 2085 32 2015 33 1940 34 1975 33 1955 34 1920 35 1895 35 1850 36 1800 37 1740...

Page 5: ...acetobemovedtotheinstallation point The furnace must be installed so that all electrical components are protected from water The furnace must be installed upstream from a refrigeration system This fur...

Page 6: ...a Platform Upflow and Horizontal Furnaces UPFLOWAPPLICATION RIGHT SIDE BOTTOM TOP LEFT SIDE TOP BOTTOM SIDE SIDE HORIZONTAL APPLICATION Allow 24 minimum clearance for servicing Therecommendedclearanc...

Page 7: ...forB ventusethe recommended clearance Do not place combustiblematerials includinggasoline and any other flammable vapors and liquids in the vicinity of the furnace requirements ForCanadianinstallatio...

Page 8: ...y to provide outside air to ensure adequate combustion and venting even though the furnace is located in an unconfined space Installation In A Confined Space A confined space is an area with volume le...

Page 9: ...per 2 000 Btuh of total appliance input If the unit is installed in an area with an exhaust fan provide sufficient ventilation to prevent negative pressures from occurring in the room The combustion...

Page 10: ...icalstorage areas Exposure to the following substances in the combustion air supply may also require Outdoor Air for combustion Permanent wave solutions Chlorinated waxes and cleaners Chlorine based s...

Page 11: ...A B149 1 Natural Gas and Propane Installation Codes and these instructions Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condi...

Page 12: ...irculatedintotheliving space and create potentially hazardous conditions including carbon monoxide poisoning that could result in personal injury or death The return air ductwork may be connected to a...

Page 13: ...ce must be properly labeled by the installer in case emergency shutdown is required Leak Check After the gas piping to the furnace is complete all connections must be tested for gas leaks To check for...

Page 14: ...to 10000 Manifold Pressure Setting in WC 3 5 3 5 3 5 3 5 3 0 For a Natural Gas Sea Level Heating Value of 900 to 999 Btu cu ft Elevation feet above sea level zero to 1999 2000 to 4999 5000 to 5999 600...

Page 15: ...witch kit is 903853 The directions to convert the furnace are given below 1 READ ALL INSTRUCTIONS BEFORE PROCEEDING WITH THE CONVERSION 2 Disconnect all electrical power to the furnace 3 Remove the ac...

Page 16: ...o the furnace must be suppliedfromadedicatedbranchcircuitcontaining the correct fuse or circuit breaker for the furnace See Table 9 An electrical disconnect must be installedtobereadilyaccessiblefroma...

Page 17: ...board must be connected to the thermostat for proper cooling mode operation COOL Figure 10 Line Voltage Field Wiring Field Supplied Disconnect Within Sight of Furnace Field Supplied Panel Connector F...

Page 18: ...in water column 0 36 psig and is not less than 4 5 in water column 0 16 psig for natural gas For LP gas the line service pressure must not exceed 14 in water column 0 51 psig and must not be less than...

Page 19: ...ow room temperature and verify steps 9 through 11 of the Sequence of Operation Verifying and Adjusting Firing Rate The firing rate must be verified for each installation to prevent over firing the fur...

Page 20: ...Factory Wiring Low Voltage High Voltage Power On Limit Circuit Open or External Load On W Pressure Switch is Open with Inducer On Pressure Switch is Closed with Inducer Off Ignition Failure Check Gro...

Page 21: ...t systems the temperature rise will fall within the range specified on the rating plate with the blower speed at the factory recommended setting If the temperature rise measured is outside the range s...

Page 22: ...Exhaust Adapter 9 Low Voltage Transformer 10 Burner Assembly 11 Supply Air Limit Switch 12 Blower Assembly 13 Induced Draft Blower 14 Vent Transition 1 Igniter 2 Flame Sensor Not Shown 3 Gas Valve 4 F...

Page 23: ...rove that flame has carried over from the igniter to the opposite end burner If no flame is sensed the furnace will shut down within 7 seconds Flame Roll Out Switch The flame roll out switch verifies...

Page 24: ...s are found Failure to prevent products of combustion from being circulated into the living space can create potentially hazardousconditionsincludingcarbon monoxidepoisoningthatcouldresultin personal...

Page 25: ...the wires from the gas valve igniter and flame sensor 6 Using wrenches separate the ground joint union in the gas supply piping at the furnace 7 Remove the piping between the gas valve and the ground...

Page 26: ...xed at this level In general whenever ignition failure occurs the warm up interval is increased by 3 seconds on the next try And if successful it remains there Minimum and maximum warm up time limits...

Page 27: ...or plugged 8 Is the flame sensor coated Remove and clean with steel wool If the furnace locks out after 5 attempts for ignition it will try again every hour if a call for heat remains If the inducer a...

Page 28: ...s Piping Connections leak tested ______________________ Gas Line Pressure __________________ in water column with furnace operating Manifold Pressure __________________ in water column with furnace op...

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