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4

Sequence Of Operation

1.  Thermostat, responding to cool room, calls for heat.

2.  Combustion air blower begins.

3. After 15 second prepurge, hot surface igniter warms up.  

4.  After approximately 5 seconds, the gas valve will open,

and the burners ignite.

5.  Thirty seconds after the burners ignite and flame sense

is proven, the main blower starts on the heating speed.

6. System remains in this state until the room air

temperature rises causing the thermostat to terminate
its call for heat.

7.  The gas valve shuts off; the burners extinguish.

8. After brief postpurge period, (5 seconds), the

combustion air fan stops. The main blower continues to
run. Elapsed time ranges from 60 seconds to 180
seconds, depending on the manufacturer’s requirement.

9.  The furnace remains idle until the next call for heat.

Variations

If your system includes air conditioning, your thermostat
(supplied by the installer) will likely have two switches. The
first switch is the system switch. The switch settings usually
include HEAT, COOL, and OFF. Some thermostats have system
switches which include HEAT, COOL, AUTO, and OFF. The
system switch must be in the HEAT or AUTO position for the
furnace to run.

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.

The furnace achieves its mid-efficiency in two general areas.
First, there is no wasteful standing pilot. The furnace
consumes no gas in between cycles. Secondly, the furnace is
designed to allow very small amounts of excess air in the
combustion process. Older furnaces had heat exchangers
that were commonly 40% larger than necessary for
complete combustion. While this prevented the creation of
carbon monoxide, the heated excess air was expelled up the
chimney where it could not benefit the interior of the
home. Special safety controls now prevent the formation of
carbon monoxide.

IMPORTANT: 

Your furnace should be cleaned and

inspected annually by a trained and qualified service
technician.

Your service technician has the knowledge and test
equipment to determine the condition of your furnace. 

WARNING

THE EXHAUST GASES FROM THIS FURNACE CONTAIN
CHEMICALS, WHICH ON SOME OCCASIONS MAY
INCLUDE CARBON MONOXIDE (CO). CARBON
MONOXIDE IS AN ODORLESS, TASTELESS, CLEAR
COLORLESS GAS, WHICH IS HIGHLY TOXIC. EVEN LOW
CONCENTRATIONS ARE SUSPECTED OF CAUSING BIRTH
DEFECTS AND OTHER REPRODUCTIVE HARM.

UL AND CUL RECOGNIZED CO DETECTORS ARE
RECOMMENDED FOR ALL BUILDINGS EQUIPPED WITH
FOSSIL FUEL BURNING APPLIANCES. ALL CO DETECTORS
SHOULD BE INSTALLED IN ACCORDANCE WITH THEIR
MANUFACTURER’S INSTRUCTIONS AND APPLICABLE
LOCAL BUILDING CODES.

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.

For replacement parts contact:

Airwell Fedders North America

2 Centre Drive, Monroe Township, NJ 08831

Phone: 1-800-332-6658

Содержание FV95A054

Страница 1: ...erence USER S INSTRUCTION GUIDE INSTALLATION OPERATION AND MAINTENANCE MANUAL Model Serial Number Date of Purchase For future reference write down the model serial number and date of purchase Use thes...

Страница 2: ...ng Piping Length 18 Pipe Using A Concentric Venting Kit 19 Exhaust Vent 20 Exhaust Vent 21 Non Direct Vent Furnace Installations 22 Direct Vent Piping Termination 17 CONDENSATE DRAINS 25 Drain Hose In...

Страница 3: ...he furnace Furnace for heating the home located in the attached garage for example 8 A gas fired furnace for installation in a residential garage must be installed so that the burners and ignitor are...

Страница 4: ...ING BIRTH DEFECTS AND OTHER REPRODUCTIVE HARM UL AND CUL RECOGNIZED CO DETECTORS ARE RECOMMENDED FOR ALL BUILDINGS EQUIPPED WITH FOSSIL FUEL BURNING APPLIANCES ALL CO DETECTORS SHOULD BE INSTALLED IN...

Страница 5: ...wall horizontal vented gas fueled equipment It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon mo...

Страница 6: ...be required 4 Existing ductwork should be assessed for its air handling capabilities For residential applications the recommended air velocity of a supply air trunk duct is 700 feet per minute fpm an...

Страница 7: ...pounds Polyurethane and similar derivatives fumes Printer s inks paint removers furniture strippers varnishes varsol toluene etc Water softener salts and chemicals LOCATION of UNIT General 1 The furna...

Страница 8: ...ER COMBUSTIBLE MATERIAL EXCEPT WOOD INSTALLATION ON COMBUSTIBLE MATERIAL CAN RESULT IN FIRE CAUSING PROPERTY DAMAGE PERSONAL INJURY OR DEATH DANGER COMBUSTIBLE MATERIAL MUST NOT BE PLACED ON OR AGAINS...

Страница 9: ...revent entraining combustion gases from an adjacent fuel burning appliance or entraining combustion air for this furnace 5 Ensure that there is adequate space and accessibility for the air filter 6 If...

Страница 10: ...ce cabinet to prevent twisting or sagging General Considerations When choosing an installation position the installer must consider the following connections Combustion air intake Exhaust vent Gas pip...

Страница 11: ...pling bands 12 Tighten the vent clamp and secure in place using the screws provided FIGURE A RIGHT INDUCER POSITION FIGURE B LEFT INDUCER POSITION SUGGESTED METHOD FOR SUSPENDING HORIZONTAL FURNACE AL...

Страница 12: ...ducer drain connector will angle toward the front of cabinet with the second nested inside directed towards the top panel The 108 000 BTUH will require an extension between the inducer and the first e...

Страница 13: ...of the cabinet WARNING WHEN INSTALLED IN THE DOWNFLOW POSITION ON A COMBUSTIBLE FLOOR SUBBASE KIT 30476 IS REQUIRED FAILURE TO INSTALL SUBBASE KIT COULD RESULT IN FIRE DEATH OR SERIOUS INJURY The open...

Страница 14: ...w that is not provided If exhaust vent exits the left side panel the pipe can be routed straight outside the cabinet The pipe exiting the cabinet in any installation should be long enough to install t...

Страница 15: ...area from which the combustion and ventilation air will be drawn negative pressure could be a problem if natural infiltration from the outdoors does not match the rate at which air is exhausted IMPOR...

Страница 16: ...ng salons Antistatic fabric softeners used in clothes dryers Carbon tetrachloride Chlorinated cleaners and waxes Chlorine and bromine based swimming pool chemicals Deicing salts or chemicals e g rock...

Страница 17: ...ED TO THE FURNACE WITH SHEET METAL SCREWS TAPE THE SHEET METAL SEAMS IN THE VICINITY OF THE FURNACE WITH DUCT TAPE OR SIMILAR MATERIAL WHEN THE FURNACE IS MOUNTED ON A PLATFORM WITH RETURN AIR THROUGH...

Страница 18: ...OLLOW ALL VENTING GUIDELINES MAY RESULT IN ERRATIC FURNACE OPERATION FREEZE UP OF THE VENTILATION AIR PIPING OR SOOTING OF THE FURNACE DANGER SOLVENT CEMENTS AND PRIMERS ARE HIGHLY FLAM MABLE PROVIDE...

Страница 19: ...r location or installa tion can cause structural or exterior finish damage to the building Caulk all cracks seams or joints within a 6 foot radius of the termination Direct Vent Piping Termination Gen...

Страница 20: ...overhangs is a minimum of 1 foot vertically for each foot horizontally up to 6 feet As a protection against freezing do not expose a 3 x 2 reducing coupling to outdoor ambient temperatures Any adjacen...

Страница 21: ...ntric vent terminal there must be a minimum of 12 clearance to grade or antici pated snow level There are no means available to raise the terminal externally If planning to use this terminal kit see T...

Страница 22: ...o use one the screen may actually encourage the formation of rime ice which could cause the intake to become blocked in certain weather conditions Horizontal Exhaust Vent Termination Horizontal vents...

Страница 23: ...quired if venting vertically through a roof The end of the exhaust pipe must be 12 higher than the entrance of the combustion air intake terminal The exhaust pipe extending through the roof must exten...

Страница 24: ...NT IN CANADA In addition to the general guidelines in Canada the non direct vent exhaust shall not terminate Directly above a paved sidewalk or paved driveway which is located between two single famil...

Страница 25: ...appliances 10 000 Btuh 4 ft 121 cm below or to side of supply inlet to building or the 3 kW 12 in 30 cm for appliances opening 1 ft 30 cm above combustion air inlet to any other 10 000 Btuh 3 kW and...

Страница 26: ...air 6 in 15 cm for appliances 10 000 Btuh 6 in 15 cm for appliances 10 000 Btuh supply inlet to building or the 3 kW 12 in 30 cm for appliances 3 kW 9 in 23 cm for appliances combustion air inlet to...

Страница 27: ...clamp to approximately 1 8 from the end of the hose 5 Fasten each drain hose to its inlet by tightening the hose clamps 6 Cut each drain hose near the blower division panel at the point where kinking...

Страница 28: ...HORIZONTAL FLOW RIGHT CONDENSATE TRAP CONDENSATE TRAP HORIZONTAL FLOW LEFT UPFLOW DOWNFLOW CONDENSATE CONDENSATE TRAP TRAP FIGURE 11 FIGURE 12 FIGURE 13 FIGURE 14 26...

Страница 29: ...Secure the condensate drain trap to the side of the fur nace using the mounting holes that were just drilled 5 Install one rubber grommet provided into each of the drain holes and then insert the 90 d...

Страница 30: ...VALVE AND GAS VALVE DURING ANY PRESSURE TESTING THAT EXCEEDS 1 2 P S I G 3 45 KPA w c 12 inches w c is recommended These pressures must be maintained while all other gas fired appliances are operatin...

Страница 31: ...o the furnace if applicable 1 Shut off electrical power to the furnace if applicable 2 Remove the upper front door to expose the gas train and burner assembly 3 Unfasten the ground joint union between...

Страница 32: ...600 1 95mm 1 20mm 2000 3000 79200 75240 51480 48906 1 90mm 1 15mm 90 000 3000 4000 75600 71820 49140 46683 1 90mm 1 10mm 5 4000 5000 72000 68400 46800 44460 1 85mm 1 10mm 5000 6000 68400 64980 44460 4...

Страница 33: ...manifold first examine the gas piping system to ensure that it is correctly sized Pipe sizing is specified in ANSI Z223 1 NFPA 54 in the U S or the B148 Natural Gas and Propane Installation Code in Ca...

Страница 34: ...are rated 120 VAC 60 Hz 1 phase The amperage rating is indicated on the furnace rating plate Each furnace requires a dedicated overcurrent device either a circuit breaker or a Type D time delay fuse...

Страница 35: ...the main burners directly See the lighting instructions on the furnace To Start The Furnace 1 Remove the burner compartment access door 2 Shut off the electrical power to the furnace and set the room...

Страница 36: ...rops causing the room thermostat heating contacts to close 2 If pressure switch contacts are closed and have failed to open since the last cycle all subsequent steps will fail to occur 3 The induced b...

Страница 37: ...e determine the air temperature rise of the furnace Insert a duct thermometer in the supply air duct The ther mometer should be placed as close as practical to the fur nace but out of the line of sigh...

Страница 38: ...ded that the heating airflow be set for the Nominal Plus setting when the furnace is matched for this cooling capacity Furnace is set at the factory for maximum cooling capacity and DIP switches must...

Страница 39: ...ommended that the Plus temperature rise is between 35 and 65 degrees F Heating Make adjustments to the controller with the electrical power off WARNING front blower shroud from furnace How To Remove T...

Страница 40: ...OR LOSS OF LIFE MAINTENANCE This is a critical connection Small amounts of corrosion can significantly increase the internal resistance of the connection A relatively small increase in resistance can...

Страница 41: ...ION WARNING heat and make a retrial for high every 5 or 10 minutes switch does not pull in the controller will continue in low finished and during the trial for ignition the high pressure If there is...

Страница 42: ......

Страница 43: ...t trips 1 hour lockout Too many low pressure switch trips after ignition 1 hour lockout 1 hour lockout Reset by cycling power or thermostat CHECK and REPAIR 1 Replace Integrated Furnace Control 2 Roll...

Страница 44: ...ignition period If main flame is not sensed during trial for ignition system will shut off HSI element and main gas flow then go through another purge period and initiate another ignition trial A tota...

Страница 45: ...5 7 0 187 67 1 21752 8720 7 67 57 7 7 5 0 187 6 2 217 18286 2 7 23 5 7 21 7 7 5 0 187 6 2 217 18286 2 7 23 5 7 21 25 0 187 67 1 25 6 1 67 7 50267 7 803 5 1 6 72 6 7 72 0 187 725 8 7 6 77 1 8720 7 67...

Страница 46: ...E DO NOT TOUCH ANY ELECTRICAL SWITCH DO NOT USE ANY PHONE IN YOUR BUILDING LEAVE THE BUILDING IMMEDIATELY IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A PHONE OUTSIDE THE BUILDING FOLLOW THE GAS SUPPLIER S...

Страница 47: ...must be in place during normal furnace operation Attempting to operate the furnace with missing doors or panels could lead to the creation of carbon monoxide gas 4 If the furnace is installed in a con...

Страница 48: ...valve Ensure that the Gas Valve Control is in the ON position see Figure 3 at right 9 Replace the burner access door ensuring that it is properly in place 10 Restore the electric power to the furnace...

Страница 49: ...2 Pull the filter out the front 3 Replace with a fresh filter and reconnect power to the furnace The filter will have an arrow indicating proper airflow direction DO NOT OPERATE YOUR FURNACE OR AIR C...

Страница 50: ...nored The furnace achieves its mid efficiency in two general areas First there is no wasteful standing pilot The furnace consumes no gas in between cycles Secondly the furnace is designed to allow ver...

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