Table of Contents
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Installation, Operation and Maintenance
MODEL F80A
CATEGORY I NATURAL GAS AND LP GAS
MID EFFICIENCY WARM AIR FURNACE
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
FURNACE SIZING . . . . . . . . . . . . . . . . . . . . . .3
LOCATION of UNIT . . . . . . . . . . . . . . . . . . . .3
INSTALLATION POSITIONS . . . . . . . . . . . . . . .4
AIR CONDITIONING . . . . . . . . . . . . . . . . . . . .4
INSPECTION/ACCESS PANEL . . . . . . . . . . . . .4
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . .5
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . .5
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . .6
DETERMING COMBUSTION AIR . . . . . . . . . .7
FURNACE VENTING . . . . . . . . . . . . . . . . . . . .8
GAS SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . .12
CONVERSIONS . . . . . . . . . . . . . . . . . . . . . . .13
HIGH ALTITUDE & AIRFLOW
SPECIFICATION TABLES . . . . . . . . . . . . . . . .14
ELECTRICAL SPECIFICATIONS . . . . . . . . . . .15
START UP PROCEDURES/
SEQUENCE OF OPERATION . . . . . . . . . . . . .17
AIR FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . .19
ADJUSTING BLOWER SPEEDS . . . . . . . . . . .19
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . .20
TROUBLESHOOTING . . . . . . . . . . . . . . . . . .21
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . .25
USER'S INSTRUCTION GUIDE
LOCATED AFTER PAGE 25 OF THIS
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
For future reference write down the model, serial
number, and date of purchase. Use these numbers in
any correspondence or service calls concerning your
furnace.
Model
Serial Number
Date of Purchase
Keep these instructions for future reference.
Please read the operating instructions and safety
precautions carefully and thoroughly before installing
and operating your furnace. Keep this manual in a
safe place for future reference.
23-23-0427N-006
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Table of Contents
Related Manuals for Fedders F80A
Summary of Contents for Fedders F80A
- Page 1 CODES ......2 FURNACE SIZING ..... .3 LOCATION of UNIT .
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Page 2: Introduction
SITUATION, WHICH, IF NOT AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY. SAFETY RULES: 1. Use this furnace only with type of gas approved for this furnace. Refer to the furnace rating plate. 2. Install this furnace only in dry indoor locations (protected from weather). -
Page 3: Codes
This furnace must be installed: • In accordance with all local codes, bylaws and regulations by those authorities having jurisdiction • In the United States, this furnace must be installed in accordance with the current ANSI Z223.1 (NFPA 54) National Fuel Gas Code •... -
Page 4: Furnace Sizing
• This furnace is not to be used for temporary heating of buildings or structures under construction. • If this furnace is to be used with air conditioning and is to be installed in an area over a finished ceiling or... -
Page 5: Installation Positions
• If the furnace is to be located in an area where the combustion air is laden with chemical compounds such as bromine, chlorine or fluorine, as may be found in swimming pool chemicals, laundry detergents, etc., use outdoor air for combustion. These compounds when exposed to flame, form acids, which attack the heat exchanger and other components. -
Page 6: Clearances
CLEARANCES Table 2 (below) provides the certified clearances to combustibles. IMPORTANT: This furnace requires a minimum of 24-inches of front clearance for service purposes. For this purpose, service clearance takes precedence over clearance to combustibles. TABLE 2: CLEARANCES TO COMBUSTIBLES... -
Page 7: Ductwork
If air conditioning is to be used with the furnace, the duct system must be capable of delivering the correct amount of airflow for each system. -
Page 8: Determing Combustion Air
If the amount of combustion and ventilation air is insufficient to properly operate the furnace and other fuel burning appliances within the unconfined area, it will be necessary to supply it from the outdoors based on the criteria used when calculating the air supply for a confined space. -
Page 9: Furnace Venting
FURNACE VENTING DEFINITIONS "Vent" and "Chimney" refer to open passageways that convey vent gases from the furnace, or its vent connector, to the outside. Vents and chimneys usually run vertically or nearly vertically. When they serve only one gas appliance, they are called "dedicated"... - Page 10 FIREPLACE OPENING PERMANENTLY SEALED. The furnace must connect to a listed chimney (B-1 Vent), or vent complying with a recognized standard, or a suitably sized, constructed and lined masonry chimney. The chimney lining method and material must comply with local requirements.
- Page 11 All furnace collars are 4 inch. When the United States ANSI Z223.1 / NFPA 54 or Canadian B149 venting tables specify the use of 3 inch venting, use a 4 to 3 reducer at the furnace collar. When the venting tables specify the use of 5inch venting, use a 5 to 4 reducer at the furnace collar.
- Page 12 MODEL F80A VENT TERMINATION Terminate all vertical vents with a listed vent cap or roof assembly unless local codes require otherwise. Locate the termination in an area free of positive pressure or wind eddies. Eddies may occur when wind swirls over roof peaks.
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Page 13: Gas Supply
There is a chance that the existing chimney will be too large. Check the size of the existing vent or chimney. It should be sized as though this is a new installation. -
Page 14: Conversions
7. Reinstall the burner manifold pipe assembly following steps 4, 5, and 6 in reverse order. If, in all other respects the furnace is ready to be fired, continue with the installation. If not, complete the remainder of the installation then return to these steps before starting the Startup &... - Page 15 1.20 mm 135-5 1.90 mm 1.15 mm Bottom & Side Returns NAT. L.P. QTY. ORIFICE ORIFICE WARM AIR FURNACE AIRFLOW - CFM TERN AL STATIC PRESURE - Inches SPEED w.c. 0.10 0.20 0.30 0.40 HIGH 8 92 10-4 ME D- HI...
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Page 16: Electrical Specifications
If an inline appliance regulator is used, ensure that it has the capacity to adequately handle the gas volume required by the furnace and any other appliances receiving gas from the header serving the furnace. Figure 8: White-Rodgers Gas valve... - Page 17 A separate in service switch is necessary if the circuit breaker is in a location where accessing it would require getting close to the furnace, or if the furnace is located between the main electrical panel and the entry to the furnace room. The...
- Page 18 MODEL F80A START UP PROCEDURES This furnace is equipped with a hot surface ignition (HSI) device. Each time that the room thermostat calls for heat, the HSI lights the main burners directly. See the lighting instructions on the furnace. TO START THE FURNACE: Remove the burner compartment access door.
- Page 19 • The burner manifold pressure is normally set to 3.5 inches w.c. for natural gas • The input rating of the furnace is based on 1075 / BTU/cu. ft. gas with a specific gravity of 0.60 Since heating values for the gas vary geographically, the actual furnace input and output will vary accordingly.
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Page 20: Air Flow
Where: Cfm is airflow in cubic feet per minute ∆T is the temperature rise Bonnet output is the furnace output capacity from the rating plate. NOTE: The bonnet output will vary directly with the input. If the actual input is below the stated input, the output will be reduced in the same ratio. - Page 21 The frequency may be increased or decreased depending on experience and conditions. CAUTION Do not operate the furnace without an air filter. LUBRICATION Both the induced draft blower motor and circulating fan motor are ball bearing type motors. Neither requires routine lubrication.
- Page 22 Wiring errors can cause improper and dangerous operation. Always verify proper operation after servicing. FURNACE OPERATION The furnace should be cycled during the annual inspection and servicing to: Test all safety related controls. Determine that the temperature rise falls within the range shown on the appliance rating plate.
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Page 23: Troubleshooting
TROUBLESHOOTING SEQUENCE OF OPERATION: WHITE RODGERS INTEGRATED FURNACE CONTROL WITH WHITE RODGERS 36G22 GAS VALVE APPLY POWER TO APPLIANCE THERMOSTAT CALLS FOR HEAT AIR PROVING SWITCH PROVED OPEN? COMBUSTION AIR BLOWER ON AIR PROVING SWITCH PROVED CLOSED PREPURGE HOT SURFACE IGNITER ON FOR... - Page 24 MODEL F80A 50V51-250...
- Page 25 Open flame rollout switch Rollout switch wiring in good condition Gas supply off or at too low a pressure to operate furnace. Damaged or broken HSI element. Line voltage to L1 terminal of 50V51-250 IFC must be 120 volts with reference t o the furnace chassis.
- Page 26 MODEL F80A FACTORY SETTING...
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Page 27: Table Of Contents
TABLE OF CONTENTS FURNACE COMPONENTS ....1 REGULATOR VENT ..... . .1 GENERAL SAFETY RULES . -
Page 28: Furnace Components
Furnace control of carbon monoxide gas. Door Switch 4. If the furnace is installed in a confined space or if you Junction Box intend to build a furnace room where insulation is present, be aware that some insulating materials are Transformer combustible. -
Page 29: Furnace Operation Information
"HEAT" or "AUTO" mode. If this is the first time that the furnace has undergone a trial ignition since installation, or if there has been work done on the gas lines, the furnace might not light because of air trapped in the gas supply line. -
Page 30: Maintenance
ROUTINE EXAMINATION It is good practice to give a quick inspection of your furnace each time you inspect or clean the air filter. Things to check: • All areas around the vent connector and chimney should be clear and free of obstructions. -
Page 31: Sequence Of Operation
The second switch is the fan switch. It usually has settings of ON and AUTO. The fan switch may be in either position when using the furnace. If the fan switch is set to ON, the main blower will run continuously, and the blower delays mentioned in the sequence of operation points 5 and 9 will be ignored. - Page 32 The information in this manual supersedes and replaces the previous instruction/operation manual with regards to Warm Air Furnace products. Illustrations cover the general appearance of the units at the time of publication and the manufacturer reserves the right to make changes in design and construction at any time without notice.