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XIX. MAINTENANCE

XIX. MAINTENANCE

XIX. MAINTENANCE

XIX. MAINTENANCE

XIX. MAINTENANCE

WARNING

T

O AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL

POWER BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST HANDLE THE

IGNITER, HANDLE WITH CARE. 

T

OUCHING THE IGNITER ELEMENT WITH BARE

FINGERS, ROUGH HANDLING, OR VIBRATION  COULD DAMAGE THE IGNITER

RESULTING IN PREMATURE FAILURE. 

O

NLY A QUALIFIED SERVICER SHOULD

EVER HANDLE THE IGNITER.

A

NNUAL

 

INSPECTION

The furnace should be inspected by a qualified installer, or service
agency at least once per year. This check should be performed at
the beginning of the heating season. This will ensure that all fur-
nace components are in proper working order and that the heating
system functions appropriately. Pay particular attention to the fol-
lowing items.  Repair or service as necessary.

Flue pipe system.  Check for blockage and/or leakage.  Check
the outside termination and the connections at and internal
to the furnace.

Heat exchanger.  Check for corrosion and/or buildup within
the heat exchanger passageways.

Burners.  Check for proper ignition, burner flame, and flame
sense.

Drainage system.  Check for blockage and/or leakage.
Check hose connections at and internal to furnace.

Wiring.  Check electrical connections for tightness and/or
corrosion.  Check wires for damage.

Filters.

F

ILTERS

CAUTION

T

O ENSURE PROPER UNIT PERFORMANCE, ADHERE TO THE FILTER SIZES

GIVEN IN THE 

P

RODUCT 

D

ATA 

B

OOK APPLICABLE TO YOUR MODEL*.

M

AINTENANCE

Improper filter maintenance is the most common cause of inad-
equate heating or cooling performance.  Filters should be cleaned
(permanent) or replaced (disposable) every two months or as re-
quired.  When replacing a filter, it must be replaced with a filter of
the same type and size.

F

ILTER

 R

EMOVAL

Depending on the installation, differing filter arrangements can be
applied.  Filters can be installed in either the central return register
or a side panel external filter rack (upflow only).  A media air filter or
electronic air cleaner can be used as an alternate filter.  Follow the
filter sizes given in the Recommended Minimum Filter size table to
ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow
installation, follow the directions provided with external filter rack
kit.  To remove internal filters see 

Internal Filter Removal 

section.

Internal filters are an accessory item  and are not included with
your furnace.  For further details, see your distributor.

H

ORIZONTAL

 U

NIT

 F

ILTER

 R

EMOVAL

Filters in horizontal installations are located in the central return
register or the ductwork near the furnace.

To remove:

1.

Turn OFF electrical power to furnace.

2.

Remove filter(s) from the central return register or ductwork.

3.

Replace filter(s) by reversing the procedure for removal.

4.

Turn ON electrical power to furnace.

M

EDIA

 A

IR

 F

ILTER

 

OR

 E

LECTRONIC

 A

IR

 C

LEANER

 R

EMOVAL

Follow the manufacturer’s directions for service.

B

URNERS

Visually inspect the burner flames periodically during the heating
season.  Turn on the furnace at the thermostat and allow several
minutes for flames to stabilize, since any dislodged dust will alter
the flames normal appearance. Flames should be stable, quiet,
soft, and blue (dust may cause orange tips but they must not be
yellow).  They should extend directly outward from the burners with-
out curling, floating, or lifting off.  Flames must not impinge on the
sides of the heat exchanger firing tubes.

I

NDUCED

 D

RAFT

 

AND

 C

IRCULATOR

 B

LOWERS

The bearings in the induced draft blower and circulator blower
motors are permanently lubricated by the manufacturer. No further
lubrication is required.  Check motor windings for accumulation of
dust which may cause overheating. Clean as necessary.

C

ONDENSATE

 T

RAP

 

AND

 D

RAIN

 S

YSTEM

 (Q

UALIFIED

 S

ERVICER

O

NLY

)

Annually inspect the drain tubes, drain trap, and field-supplied drain
line for proper condensate drainage.  Check drain system for hose
connection tightness, blockage, and leaks.  Clean or repair as
necessary.

F

LAME

 S

ENSOR

 (Q

UALIFIED

 S

ERVICER

 O

NLY

)

Under some conditions, the fuel or air supply can create a nearly
invisible coating on the flame sensor.  This coating acts as an
insulator causing a drop in the flame sense signal.  If the flame
sense signal drops too low the furnace will not sense flame and
will lock out.  The flame sensor should be carefully cleaned by a
qualified servicer using emery cloth or steel wool.  Following clean-
ing, the flame sense signal should be 1 to 4 microamps at 115
volts.

F

LUE

 P

ASSAGES

 (Q

UALIFIED

 S

ERVICER

 O

NLY

)

The heat exchanger flue passageways should be inspected at the
beginning of each heating season.  If necessary, clean the pas-
sageways as outlined below.

1.

Turn OFF the electrical power and gas supply to the  furnace.

2.

Disconnect the gas line and remove the burner/ manifold
assembly by removing the screws securing the assembly
to the partition panel.

3.

Disconnect the flue pipe system from the induced draft
blower.

4.

Remove the induced draft blower and, drain and pressure
tap hoses from the recuperator coil front cover.

5.

Remove the recuperator coil front cover to expose the coil
tubes and turbulators.

6.

Remove the recuperator coil turbulators individually by slowly
pulling each turbulator forward firmly.

7.

Clean the recuperator coil tubes using a long handle wire
brush, such as a gun cleaning brush.

8.

Clean the primary heat exchanger tubes using a wire brush
attached to a length of high grade stainless steel cable,
such as drain cleanout cable. Attach a  variable speed
reversible drill to the other end of the cable.  Slowly rotate
the cable with the drill  and insert it into one of the heat
exchanger tubes.  While reversing the drill, work the cable

Содержание GMS95

Страница 1: ...f in a position which is more hazardous than when the unit is in operation Remember it is your responsibility to install the product safely and to know it well enough to be able to instruct a customer...

Страница 2: ...ROPER VENT FLUE AND COMBUSTION AIR PIPING PRACTICES 13 TERMINATION LOCATIONS 13 CANADIAN VENTING REQUIREMENTS 14 STANDARD FURNACE CONNECTIONS 14 ALTERNATE FURNACE CONNECTIONS 14 NON DIRECT VENT SINGLE...

Страница 3: ...afety Circuit Description 31 GENERAL 31 INTEGRATED CONTROL MODULE 31 PRIMARY LIMIT 31 AUXILIARY LIMIT 31 ROLLOUT LIMIT 31 PRESSURE SWITCHES 31 FLAME SENSOR 31 XVIII Troubleshooting 31 ELECTROSTATIC DI...

Страница 4: ...warranty certificate is also supplied with the unit Read the warranty carefully and note what is covered Keep the warranty cer tificate in a safe location for future reference If additional informatio...

Страница 5: ...lectrical Connection Inlets Alternate 19 Coil Front Cover Pressure Tap 20 Coil Front Cover Drain Port 21 Drain Line Penetrations 22 Drain Trap 23 Blower Door Interlock Switch 24 Capacitor 25 Integrate...

Страница 6: ...are set per the furnace rating plate The input rate and temperature rise are set per the furnace rating plate 100 outside air is provided for combustion air requirements during construction Temporary...

Страница 7: ...ly air opening and the combustible floor Exposure to contaminated combustion air will result in safety and performance related problems Do not install the furnace where the combustion air is exposed t...

Страница 8: ...g system properly vents when tested as outlined above re turn doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use halogen type refriger...

Страница 9: ...input rating of all appliances installed in that space Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors are considered a par...

Страница 10: ...nsion of rectangular air ducts shall not be less than 3 inches ing shall have a minimum free area of 1 square inch per 1 000 BTU per hour of the total input rating of all gas utilization equipment in...

Страница 11: ...tallation Positions figure for appropriate in stallation positions ductwork connections and resulting airflow arrangements VII HO VII HO VII HO VII HO VII HORIZO RIZO RIZO RIZO RIZONT NT NT NT NTAL AP...

Страница 12: ...ane gas installations require an orifice change to compensate for the energy content difference between natural and propane gas High altitude installations may require both a pressure switch and an or...

Страница 13: ...nt flue pipe and a combustion air intake pipe Refer to the appropriate section for details concerning piping size length number of elbows furnace connections and terminations MATERIALS AND JOINING MET...

Страница 14: ...DIRECT VENT INSTALLATIONS On upflow units secure the combustion air intake pipe directly to the air intake coupling On counterflow units secure the combus tion air intake pipe to the air intake coupl...

Страница 15: ...ue piping to the rubber elbow using a worm gear hose clamp NOTE Use of the alternate vent flue location for upright installations requires the drain trap be installed on the same side of the unit as t...

Страница 16: ...ould be in stalled on either side of the wall and solvent cemented to a length of pipe connecting the two couplings The length of pipe should be the wall thickness plus the depth of the socket fitting...

Страница 17: ...s in each Vent Flue Combustion Air Intake pipe Elbows and or tees used in the terminations must be included when determining the number of elbows in the piping systems If the combustion air intake pip...

Страница 18: ...es If the pipes must go below the joist and then up into the last joist space to penetrate the header two 45 elbows should be used to reach the header rather than two 90 elbows VENT INTAKE TERMINATION...

Страница 19: ...t installations using the standard vent flue outlet require drain hoses to be connected as follows The following quantity of hoses tubes and hose clamps are provided with the unit HOSE A QTY 1 HOSE B...

Страница 20: ...flow models relocation of the front cover pressure switch hose is required Make connections as follows 1 Remove the rubber plug from the coil front cover drain port Counterflow furnaces Relocate the f...

Страница 21: ...is an integral part of this furnace Field alter ation to comply with electrical codes should not be required Wires are color coded for identification purposes Refer to the wiring diagram for wire rout...

Страница 22: ...at 120 VAC Turn OFF power to the furnace before installing any accessories Follow the humidifier or air cleaner manufacturers instructions for locating mounting grounding and controlling these access...

Страница 23: ...field convertible for use with propane gas by replacing the regulator spring with a propane gas spring from an appropriate manufacturer s propane gas conversion kit Taps for measuring the gas supply p...

Страница 24: ...rotect against external corrosion when in contact with masonry plaster or insulation or subjected to repeated wetting by liquids such as water except rain water detergents or sewage MANUAL SHUT OFF VA...

Страница 25: ...nace manifold with all gas appliances in operation Maintaining proper gas pressure depends on three main factors 1 Vaporization rate depending on temperature of the liquid and wetted surface area of t...

Страница 26: ...the dampers or other means used to control the flow of air must be adequate to prevent chilled air from entering the furnace and if manually operated must be equipped with means to prevent operation...

Страница 27: ...nace is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand 5 Move the furnace gas valve manual control to the OFF position 6 Wait five minute...

Страница 28: ...soap suds check for leaks at hose connection Bubbles forming indicate a leak SHUTOFF GASAND FIXALLLEAKS IMMEDIATELY BEFORE PROCEEDING TO NEXT STEP 6 Measure furnace gas supply pressure Supply pressure...

Страница 29: ...uals the installation s gas heating value multiplied with a conversion factor hours to seconds divided by the number of seconds per cubic foot The measured input must not be greater than the input ind...

Страница 30: ...sensed Circulator blower is energized on heat speed following a fixed thirty second blower on delay Electronic air cleaner terminals are energized with circulator blower Furnace runs integrated contro...

Страница 31: ...DISCHARGE ESD PRECAUTIONS NOTE Discharge body s static electricity before touching unit An electrostatic discharge can adversely affect electrical components Use the following precautions during furna...

Страница 32: ...e filter s by reversing the procedure for removal 4 Turn ON electrical power to furnace MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL Follow the manufacturer s directions for service BURNERS Visu...

Страница 33: ...he blower until filter clears bottom rail 5 Lower filter down and pull outward Front of Furnace Blower Front of Furnace Blower 6 Replace filter by reversing procedure X X X X XXI BEFO XI BEFO XI BEFO...

Страница 34: ...34...

Страница 35: ...kage proper length elbows and termination Check drain system Correct as necessary Correct pressure switch setpoint or contact motion Tighten or correct wiring connection Pressure switch hose blocked p...

Страница 36: ...e sensor with emery clot See Vent Flue Pipe section for piping details See rating plate for proper gas pressure 7 7 FLASHES Flame sensor is coated oxidized Flame sensor incorrectly positioned in burne...

Страница 37: ...OSTAT CONNECTIONS BU GN GND 115 VAC 24 VAC BLOWER COMPARTMENT DOOR SWITCH OPEN WHEN DOOR OPEN DOOR SWITCH WARNING DISCONNECT POWERBEFORE SERVICING WIRING TOUNITMUST BE PROPERLYPOLARIZED AND GROUNDED B...

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