background image

meter test dial is:

Where:

Input is expressed in BTU/Hr.

Heating value of the gas is expressed in BTU/ ft

3

Time means time required for the test dial to indicate 1 ft

3

/sec.

If using a gas meter with SI (metric) units:

1 ft

3

= 0.0283 m

3

1 m

3

= 35.315 ft

3

0.01 m

3

= 0.3531 ft

3

0.5  m

3

= 1.766 ft

3

TABLE 7: INPUT VALUES

HEATING VALUE OF NATURAL GAS in BTU / FT_

00

950

1000

1050

1100

860

44,186

46,512

48,837

51,163

605

61,860

65,116

68,372

71,628

,023

119,302

125,581

131,860

138,140

Heating Value of Gas X 3000

T

Input =

Bonnet Output

1.085 x    T

Airflow (CFM) =

IMPORTANT: NEVER ADJUST THE INPUT OF THE FURNACE
TO EXCEED THE INPUT SHOWN ON THE RATING PLATE.

when the furnace is operating with both stages of heat
on.  If a higher temperature rise is desired, refer to the dip
switch settings for “Heating”.  This can be adjusted to
Nominal-Plus to reduce the air temperature rise or
Nominal-minus to increase the air temperature rise.

AIRFLOW

For proper furnace operation, airflow over the heat
exchanger is of utmost importance. Insufficient airflow
accelerates metal fatigue and failure in the heat exchanger
and excessive airflow promotes accelerated corrosion of the
heat exchanger.
IMPORTANT: Do not bypass this step of the start up
procedures.

Calculating Airflow

There are circumstances where it may be desirable to
know the airflow delivery through the duct system, such as
when estimating the amount of airflow available for air
conditioning. This can be done by direct measurement
with electronic or sloped manometers and velometers, or
by using the formula below.

Circulating Air Blower And Temperature Rise Check

variable speed circulation air blower motor that will supply
a constant airflow when operated within the external stat-
ic pressure limits of the unit.  One of the benefits of a vari-
able speed circulation air blower is soft starting and stop-
ping.  The motor will ramp up to normal operating speed
gradually.  This will minimize noise and increase comfort by
eliminating the initial blasts of cooler air encountered with
constant speed motors.  At the end of a heating or cooling
cycle, the variable speed motor will slowly ramp down
after the blower off delay timer expires.  If the fan is set to
operate as a continuous blower, the motor will slowly ramp
down to the airflow set for that mode.

Temperature Rise Check

When the duct system is complete and the air filters are in
place, 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 sight” of the heat exchanger
so to prevent a false reading due to radiated heat.  Ensure
that the thermometer is within the duct air-stream.  Avoid
locations such as the inside radius of an elbow, etc.

Insert a duct thermometer into the return duct as close to
the furnace as possible.  Ensure that the thermometer loca-
tion will be unaffected by humidifier bypass ducts, etc.
Choose a location that ensures the thermometer will be
within the air-stream of the duct. Operate the furnace long
enough to obtain a steady state condition.

When the two thermometers have stabilized, compare the
two readings.  Subtract the return air duct temperature
from the supply air duct temperature.  This difference is
the temperature rise.

TABLE 7: INPUT VALUES

HEATING VALUE OF NATURAL GAS in BTU / FT_

MODEL

INTERVAL TO

CONSUME 1 FT_

(SECONDS)

900

950

1000

1050

1100

GTM050C

72

41,860

44,186

46,512

48,837

51,163

GTM070C

51

58,605

61,860

65,116

68,372

71,628

GTM135C

27

113,023

119,302

125,581

131,860

138,140

Heating Value of Gas X 3000

Time in Sec. or 1 cu. ft.

Input =

Bonnet Output

1.085 x    T

Airflow (CFM) =

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.

Adjusting Dip Switches

If the blower speeds require adjusting, follow these steps:

1.  Remove the blower compartment door.

switches/jumpers and select the appropriate settings

3.

DIP switches or jumpers are found on the integrated
furnace control board. 
NOTE: some integrated furnace controls are equipped
with jumpers for blower adjustments. Please reference
“Letter” on adjustment table and control board when
making adjustment.

4.

Re-install the blower compartment door.

5.

Upon completion, recheck the furnace temperature rise
to ensure that the desired condition exists.

WARNING

DISCONNECT THE ELECTRICAL SUPPLY TO THE FURNACE
BEFORE ATTEMPTING TO CHANGE THE BLOWER SPEED.
FAILURE TO DO SO COULD RESULT IN ELECTRICAL SHOCK
RESULTING IN PERSONAL INJURY OR LOSS OF LIFE.

2.  Refer to the tables next page for adjusting DIP

The FV95A series 2-stage gas furnace is supplied with a

The formula for determining the furnace input via the gas

A temperature rise within 35-65 degrees F is acceptable

35

ime in Sec. for 1 cu. ft.

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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