Heat Controller GLUB 95 Quick Start Manual

ISO 9001:2008

HEAT CONTROLLER

INSTALLATION INSTRUCTIONS

FOR UPFLOW & DOWNFLOW/HORIZONTAL HIGH EFFICIENCY CONDENSING GAS FURNACES GLUB/GLDB SERIES

U.L. recognized fuel gas and CO (carbon monoxide) detectors are recommended in all applications, and their installation should be in accordance with the manufacturer’s recommendations and/or local laws, rules, regulations, or customs.

92-24161-93-01

SUPERSEDES 92-24161-93-00

INSTALLATION CHECK LIST

REFER TO INSTALLATION INSTRUCTIONS

GAS SUPPLY

Adequate pipe size

orrect supply pressure (during furnace operation)

Manifold pressure

No gas leaks

L.P. Kit Number (if applicable)

ELECTRICAL

115 V.A.C. supply (Single Circuit)

Polarity observed

Furnace properly grounded

Adequate wire size

FURNACE INSTALLATION

Adequate clearance to combustibles

Adequate clearance for service (at front)

DUCT STATIC PRESSURE

in. w.c. on heating speed

in. w.c. on cooling speed

Air temperature rise

TERMINATIONS – DIRECT VENT

VERTICAL

ntake – 12" min. above roof/snow level

Correct relationship – exhaust to intake

HORIZONTAL/VERTICAL – CONCENTRIC (RXGY-E03A)

Intake – 12" min. above roof/snow level

Intake “Y” rotated above center

Exhaust sloped toward furnace

HORIZONTAL – STANDARD (RXGY-D02, -D02A, -D03, D03A)

Correct relationship – exhaust to intake

12" min. above grade/snow level

HORIZONTAL – ALTERNATE (RXGY-D02, -D02A, -D03, D03A)

Correct relationship – exhaust to intake

Above anticipated snow level

VENTING – NON-DIRECT VENT

in. diameter – exhaust pipe

ft. of pipe – exhaust

CONDENSATE LINE

Trap filled with water

Vented

Sloped toward drain

Condensate drain line hoses connected and clamped

Freeze protection (if necessary)

VENTING – DIRECT VENT

in. diameter – intake pipe

in. diameter – exhaust pipe

ft. of pipe – intake air

no. of elbows – intake air

ft. of pipe – exhaust pipe

no. of elbows – exhaust pipe

Exhaust vent temp.

no. of elbows

TERMINATION – NON-DIRECT VENT

VERTICAL

12" min. above roof/snow level

HORIZONTAL – STANDARD

12" min. above grade/snow level

HORIZONTAL – ALTERNATE

Above anticipated snow level

Model Number

Serial #

Date of Installation

SAFETY INFORMATION

WARNING

USE ONLY WITH TYPE OF GAS APPROVED FOR THIS FURNACE.

EFER TO THE FURNACE RATING

R PLATE.

WARNING

NSTALL THIS FURNACE ONLY IN

I A LOCATION AND POSITION AS SPECIFIED IN THE LOCATION

EQUIREMENTS AND

R CONSIDERATIONS SECTION OF THESE INSTRUCTIONS. PROVIDE ADEQUATE COMBUSTION AND VENTILATION AIR TO THE FURNACE SPACE AS SPECIFIED IN THE VENTING SECTION OF THESE INSTRUCTIONS.

WARNING

PROVIDE ADEQUATE COMBUSTION AND VENTILATION AIR TO THE FURNACE SPACE AS SPECIFIED IN THE COMBUSTION AND VENTILATION AIR SECTION OF THESE INSTRUCTIONS.

WARNING

COMBUSTION PRODUCTS MUST BE DISCHARGED OUTDOORS. CONNECT THIS FURNACE TO AN APPROVED VENT SYSTEM ONLY, AS SPECIFIED IN VENT PIPE INSTALLATION SECTION OF THESE INSTRUCTIONS.

WARNING

DO NOT OPERATE THE SYSTEM FOR EXTENDED PERIODS WITHOUT FILTERS. A PORTION OF THE DUST ENTRAINED IN THE AIR MAY TEMPORARILY LODGE IN THE AIR DUCT RUNS AND AT THE SUPPLY REGISTERS. ANY CIRCULATED DUST PARTICLES WILL BE HEATED AND CHARRED BY CONTACT WITH THE FURNACE HEAT EXCHANGER. THIS SOOTY RESIDUE WILL SOIL CEILINGS, WALLS, DRAPES, CARPETS AND OTHER HOUSEHOLD ARTICLES. SOOT DAMAGE MAY ALSO RESULT WITH, OR WITHOUT, FILTERS IN PLACE, WHEN CERTAIN TYPES OF CANDLES ARE BURNED, OR CANDLEWICKS ARE LEFT UNTRIMMED.

WARNING

EVER TEST FOR GAS LEAKS

N WITH AN OPEN FLAME. USE A COMMERCIALLY AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE DETECTION OF LEAKS TO CHECK ALL CONNECTIONS, AS SPECIFIED IN GAS SUPPLY AND PIPING SECTION OF THESE

NSTRUCTIONS.

WARNING

ALWAYS INSTALL FURNACE TO OPERATE WITHIN THE FURNACE'S INTENDED TEMPERATURE-RISE RANGE WITH A DUCT SYSTEM WHICH HAS AN EXTERNAL STATIC PRESSURE WITHIN THE ALLOWABLE RANGE, AS SPECIFIED IN DUCTING SECTION OF THESE INSTRUCTIONS. SEE ALSO FURNACE RATING PLATE.

WARNING

WHEN A FURNACE IS INSTALLED SO THAT SUPPLY DUCTS CARRY AIR CIRCULATED BY THE FURNACE TO AREAS OUTSIDE THE SPACE CONTAINING THE FURNACE, THE RETURN AIR SHALL ALSO BE HANDLED BY DUCT(S) SEALED TO THE FURNACE CASING AND TERMINATING OUTSIDE THE SPACE CONTAINING THE FURNACE.

WARNING

DO NOT INSTALL THIS FURNACE IN A MOBILE HOME!! THIS FURNACE IS NOT APPROVED FOR INSTALLATION IN A MOBILE HOME. DOING SO COULD CAUSE FIRE, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING

WHEN THIS FURNACE IS INSTALLED IN A RESIDENTIAL GARAGE, IT MUST BE INSTALLED SO THE BURNERS AND IGNITION SOURCE ARE LOCATED NO LESS

HAN 18 INCHES ABOVE THE

T FLOOR. THIS IS TO REDUCE THE RISK OF IGNITING FLAMMABLE VAPORS WHICH MAY BE PRESENT IN A GARAGE. ALSO, THE FURNACE MUST BE LOCATED OR PROTECTED TO AVOID PHYSICAL DAMAGE BY VEHICLES. FAILURE TO FOLLOW THESE WARNINGS CAN CAUSE A FIRE OR EXPLOSION, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING

INSTALLATION MUST COMPLY WITH ALL INSTALLATION INSTRUCTIONS INCLUDING:

• PROPER VENT INSTALLATION;

• FURNACE OPERATING UNDER THERMOSTATIC CONTROL;

• RETURN AIR DUCT SEALED TO THE FURNACE;

• AIR FILTERS IN PLACE;

• SET FURNACE INPUT RATE AND TEMPERATURE RISE PER RATING PLATE MARKING;

• MEANS FOR PROVIDING OUTDOOR AIR REQUIRED FOR COMBUSTION;

• RETURN AIR TEMPERATURE MAINTAINED BETWEEN 55°F (13°C) AND 80°F (27°C); AND

• CLEAN FURNACE, DUCT WORK AND COMPONENTS UPON SUBSTANTIAL COMPLETION OF THE CONSTRUCTION PROCESS, AND VERIFY FURNACE OPERATING CONDITIONS INCLUDING IGNITION, INPUT RATE, TEMPERATURE RISE AND VENTING, ACCORDING TO THE INSTRUCTIONS.

WARNING

DUCT LEAKS CAN CREATE AN UNBALANCED SYSTEM AND DRAW POLLUTANTS SUCH AS DIRT, DUST, FUMES AND ODORS INTO THE HOME CAUSING PROPERTY DAMAGE. FUMES AND ODORS FROM TOXIC, VOLATILE OR FLAMMABLE CHEMICALS, AS WELL AS AUTOMOBILE EXHAUST AND CARBON MONOXIDE (CO), CAN BE DRAWN INTO THE LIVING SPACE THROUGH LEAKING DUCTS AND UNBALANCED DUCT SYSTEMS CAUSING PERSONAL INJURY OR DEATH (SEE FIGURE

3).

• IF AIR-MOVING EQUIPMENT OR DUCTWORK IS LOCATED IN GARAGES OR OFF-GARAGE STORAGE AREAS - ALL JOINTS, SEAMS, AND OPENINGS IN THE EQUIPMENT AND DUCT MUST BE SEALED TO LIMIT THE MIGRATION OF TOXIC FUMES AND ODORS INCLUDING CARBON MONOXIDE FROM MIGRATING INTO THE LIVING SPACE.

• IF AIR-MOVING EQUIPMENT OR DUCTWORK IS LOCATED IN SPACES CONTAINING FUEL BURNING APPLIANCES SUCH AS WATER HEATERS OR BOILERS - ALL JOINTS, SEAMS, AND OPENINGS IN THE EQUIPMENT AND DUCT MUST ALSO BE SEALED TO PREVENT DEPRESSURIZATION OF THE SPACE AND POSSIBLE MIGRATION OF COMBUSTION BYPRODUCTS INCLUDING CARBON MONOXIDE INTO THE LIVING SPACE.

NOTICE

IMPROPER INSTALLATION, OR INSTALLATION NOT MADE IN ACCORDANCE WITH THE CSA INTERNATIONAL (CSA) CERTIFICATION OR THESE INSTRUCTIONS, CAN RESULT IN UNSATISFACTORY OPERATION AND/OR DANGEROUS CONDITIONS AND ARE NOT COVERED BY THE UNIT WARRANTY.

NOTICE

IN COMPLIANCE WITH RECOGNIZED CODES, IT IS RECOMMENDED THAT AN AUXILIARY DRAIN PAN BE INSTALLED UNDER ALL EVAPORATOR COILS OR UNITS CONTAINING EVAPORATOR COILS OR GAS FURNACES USED WITH EVAPORATOR COILS THAT ARE LOCATED IN ANY AREA OF A STRUCTURE WHERE DAMAGE TO THE BUILDING OR BUILDING CONTENTS MAY OCCUR AS A RESULT OF AN OVERFLOW OF THE COIL DRAIN PAN OR A STOPPAGE IN THE PRIMARY CONDENSATE DRAIN PIPING.

SAFETY INFORMATION

IMPORTANT!

THE COMMONWEALTH OF MASSACHUSETTS REQUIRES COMPLIANCE WITH REGULATION 248 CMR 4.00 AND 5.00 FOR INSTALLATION OF THROUGH-THEWALL VENTED GAS APPLIANCES AS FOLLOWS:

(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time

of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side 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 monoxide detectors.

a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.

b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.

2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide

detector is required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.

3.SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size “GAS

VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.

4. INSPECTION. The state or local

gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a) 1 through 4.

(b) EXEMPTIONS: The following equipment is exempt from 248 CMR

5.08(2)(a) 1 through 4:

1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition of NFPA 54 as adopted by the Board; and

2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.

(c) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

1. Detailed instructions for the installation of the venting system design or the venting system components; and

2. A complete parts list for the venting system design or venting system.

(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identified “special venting systems”, the following requirements shall be satisfied by the manufacturer:

1. The referenced “special venting system” instructions shall be included with the appliance or equipment installation instructions; and

2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.

(e) A copy of installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

IMPORTANT: All manufacturer products meet current Federal OSHA Guidelines for safety. California Proposition 65 warnings are required for certain products, which are not covered by the OSHA standards.

California's Proposition 65 requires

arnings for products sold in California

w that contain, or produce, any of over 600 listed chemicals known to the State

f California to cause cancer or birth

o defects such as fiberglass insulation, lead in brass, and combustion products

rom natural gas.

All “new equipment” shipped for sale in California will have labels stating that the product contains and/or produces Proposition 65 chemicals. Although we have not changed our processes, having the same label on all our products facilitates manufacturing and shipping. We cannot always know “when, or if” products will be sold in the California market.

You may receive inquiries from customers about chemicals found in, or produced by, some of our heating and air-conditioning equipment, or found in natural gas used with some of our products. Listed below are those chemicals and substances commonly associated with similar equipment in our industry and other manufacturers.

• Glass Wool (Fiberglass) Insulation

• Carbon Monoxide (CO)

• Formaldehyde

• Benzene

More details are available at the Websites for OSHA (Occupational Safety and Health Administration), at www.osha.gov California's OEHHA (Office of Environmental Health Hazard Assessment), at www.oehha.org. Consumer education is important since the chemicals and substances on the list are found in our daily lives. Most consumers are aware that products present safety and health risks, when improperly used, handled and maintained.

and the State of

CONTENTS

afety Precautions ...................................................................................................1

nstallation Check List ..............................................................................................2

afety Information ....................................................................................................3

eneral Information..................................................................................................6

ocation Requirements and Considerations ............................................................8

ucting ...................................................................................................................13

enting and Combustion Air Piping .......................................................................14

ombustion and Ventilation Air ..............................................................................16

ent Pipe Installation..............................................................................................19

Condensate Drain/Neutralizer................................................................................32

Converting Downflow to Horizontal ........................................................................34

Gas Supply and Piping...........................................................................................36

High Altitude Instructions........................................................................................38

Electrical Wiring......................................................................................................41

Accessories............................................................................................................42

Furnace Twinning...................................................................................................42

Start-Up Procedures...............................................................................................46

Air Flow...................................................................................................................48

Maintenance...........................................................................................................51

Troubleshooting......................................................................................................54

Wiring Diagrams................................................................................................55-56

IMPORTANT: TO INSURE PROPER INSTALLATION AND OPERATION OF THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR THIS PRODUCT. UPON UNPACKING OF THE FURNACE, INSPECT ALL PARTS FOR DAMAGE PRIOR TO INSTALLATION AND START-UP.

GENERAL INFORMATION

The GLUB and GLDB series furnaces are design-certified by CSA for use with natural and propane gases as follows:

. As non-direct vent central forced

air furnaces taking combustion air from the installation area or using air ducted from the outside.

2. As direct vent central forced air furnaces with all combustion air supplied directly to the furnace

urners through a special air

b intake system outlined in these instructions.

Install this furnace in accordance with the American National Standard Z223.1 – latest edition entitled “National Fuel Gas Code” (NFPA54) and requirements or codes of the local utilities or other authorities having jurisdiction. This is available

rom the following:

National Fire Protection

Association, Inc. Batterymarch Park Quincy, MA 02269

CSA-INTERNATIONAL 8501 East Pleasant Valley Road Cleveland, Ohio 44131-5575

Install units in Canada in accordance with CSA-B149, local installation codes and authorities having jurisdiction. CSA-B149 is available from:

SA-INTERNATIONAL

C 178 Rexdale Blvd. Toronto, Ontario Canada M9W, 1R3

FIGURE 1

UPFLOW FURNACE

FIGURE 2

DOWNFLOW/HORIZONTAL FURNACE

ITEM ITEM

NO. PART NAME NO. PART NAME

1 CONDENSATE TRAP 13 TOP PLATE 2 DOOR SWITCH 14 BURNER 3 JUNCTION BOX 15 IGNITER (HSI ONLY) 4 TRANSFORMER 16 COMBUSTION AIR INLET 5 BLOCKED DRAIN PRESSURE SWITCH 17 GAS VALVE 6 MAIN PRESSURE SWITCH 18 INDUCED DRAFT BLOWER 7 EXHAUST TRANSITION 19 CAPACITOR 8 CONNECTOR 20 LOW VOLTAGE (THERMOSTAT)

9 OUTLET AIR PIPE TERMINAL 10 SHIPPING PLUG 21 CONTROL MOUNTING PLATE 11 FLAME SENSOR 22 BLOWER 12 OVERTEMPERATURE SWITCH

I409 I409

ITEM ITEM

NO. PART NAME NO. PART NAME

1 INDUCED DRAFT BLOWER 14 LOW VOLTAGE TERMINAL (THERMOSTAT) 2 CAPACITOR 15 TRANSFORMER 3 INLET AIR CHASE 16 PRESSURE SWITCH 4 DOOR SWITCH 17 OUTLET AIR PIPE 5 JUNCTION BOX 18 GAS VALVE 6 INLET PIPE CONNECTOR 19 CONNECTOR 7 TOP PLATE 20 EXHAUST TRANSITION 8 CONTROL MOUNTING PLATE 21 CONDENSATE TRAP

9 AUXILIARY LIMIT 22 IGNITER (HSI) 10 SHIPPING PLUG 23 MANIFOLD 11 EXHAUST CONNECTION 24 OVERTEMPERATURE SWITCH 12 BLOWER 25 ROLLOUT SWITCH 13 EXHAUST PIPE EXTENSION 26 FLAME SENSOR

27 BURNER

IMPORTANT INFORMATION ABOUT EFFICIENCY AND INDOOR AIR QUALITY

Central cooling and heating equipment is only as efficient as the duct system that carries the cooled or heated air. To maintain efficiency, comfort and good indoor air quality, it is important to have the proper balance between the air being supplied to each room and the air returning to the cooling and heating equipment.

Proper balance and sealing of the duct system improves the efficiency of the heating and air conditioning system and improves the indoor air quality of the home by reducing the amount of airborne pollutants that enter homes from spaces where the ductwork and/or equipment is located. The manufacturer and the U.S. Environmental Protection Agency’s Energy Star Program recommend that central duct systems be checked by a qualified contractor for proper balance and sealing.

WARNING

3).

NOTICE

FIGURE 3

MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO LIVING SPACES

RECEIVING

Immediately upon receipt, all cartons and contents should be inspected for transit damage. Units with damaged cartons should be opened immediately. If damage is found, it should be noted on the delivery papers, and a damage claim filed with the last carrier.

• After unit has been delivered to job site, remove carton taking care not to damage unit.

• Check the unit rating plate for unit size, electric heat, coil, voltage, phase, etc. to be sure equipment

matches what is required for the job specification.

• Read the entire instructions before starting the installation.

Some building codes require extra

• cabinet insulation and gasketing when unit is installed in attic applications.

• If installed in an unconditioned space, apply caulking around the power wires, control wires, refrigerant tubing and condensate line where they enter the cabinet. Seal the power wires on the inside where they exit conduit opening. Caulking is required to prevent air leakage into and condensate from forming inside the unit, control box, and on electrical controls.

• Install the unit in such a way as to allow necessary access to the coil/filter rack and blower/control compartment.

• Install the unit in a level position to ensure proper condensate drainage. Make sure unit is level in both directions within 1/8”.

• Install the unit in accordance with any local code which may apply and the national codes. Latest editions are available from:

“National Fire Protection Association, Inc., Batterymarch Park, Quincy, MA 02269.” These publications are:

• ANSI/NFPA No. 70-(Latest Edition) National Electrical Code.

• NFPA90A Installation of Air Conditioning and Ventilating Systems.

• NFPA90B Installation of warm air heating and air conditioning systems.

• The equipment has been evaluated in accordance with the Code of Federal Regulations, Chapter XX, Part 3280.

LOCATION REQUIREMENTS AND CONSIDERATIONS

GENERAL INFORMATION

WARNING

DO NOT USE THIS FURNACE DURING CONSTRUCTION IF AIR LADEN CORROSIVE COMPOUNDS ARE PRESENT SUCH AS CHLORINE AND FLUORINE. OTHERWISE, PROVISIONS MUST BE TAKEN TO PROVIDE CLEAN, UNCONTAMINATED COMBUSTION AND VENTILATION AIR TO THE FURNACE. FURNACE COMBUSTION AND VENTILATION AIR CONTAMINATED WITH THESE COMPOUNDS FORMS ACIDS DURING COMBUSTION WHICH CORRODES THE HEAT EXCHANGER AND COMPONENT PARTS. SOME OF THESE CONTAMINANTS ARE FOUND IN, BUT NOT LIMITED TO, PANELING, DRY WALL, ADHESIVES, PAINTS, STAINES, VARNISHES, SEALERS, AND MASONRY CLEANING MATERIALS.

WARNING

DO NOT INSTALL THIS FURNACE IN A MOBILE HOME!! This furnace

is not approved for installation in a mobile home. Doing so could cause

FIRE, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING

WHEN THIS FURNACE IS INSTALLED IN A RESIDENTIAL GARAGE, IT MUST BE INSTALLED SO THE BURNERS AND IGNITION SOURCE ARE LOCATED NO LESS THAN 18 INCHES ABOVE THE FLOOR. THIS IS TO PREVENT THE RISK OF IGNITING FLAMMABLE VAPORS WHICH MAY BE PRESENT IN A GARAGE. ALSO, THE FURNACE MUST BE LOCATED OR PROTECTED TO AVOID PHYSICAL DAMAGE BY VEHICLES. FAILURE TO FOLLOW THESE WARNINGS CAN CAUSE A FIRE OR EXPLOSION, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

1. IMPORTANT: If installing the unit over a finished ceiling or

iving area, be certain to install an

l auxiliary condensate drain pan under the entire unit. This

uxiliary drain pan should extend

a under any evaporator coil installed with the furnace and the

pen portion of the condensate

o drain assembly. See “Condensate Drain/Neutralizer” section for more details.

2. IMPORTANT: If using a cooling evaporator coil with this furnace:

a. be sure the air passes over

the heat exchanger before passing over the cooling coil. The cooled air passing over the warm ambient air inside the heat exchanger tubes can cause condensation inside the tubes resulting in corrosion and eventual failure.

b. install a parallel duct system

to divert all the air from the furnace allowing it to pass over the cooling coil only. Use dampers or other means to prevent chilled air from passing over the heat exchanger.

If these are manual dampers, they must be equipped to prevent heating or cooling operation unless the damper is in the full heat or cool position.

FIGURE 4

HORIZONTAL FURNACE W/HEAT TAPE ON CONDENSATE TRAP

DRAIN PIPE

3. IMPORTANT: Install the furnace level. If it is not level, condensate

annot drain properly, possibly

c causing furnace shut down.

NOTE: These furnaces are approved for installation in attics, as well as alcoves, utility rooms, closets and crawlspaces. Provisions must be made to prevent freezing of condensate.

If this furnace is installed in a garage, attic and/or any unconditioned space, install a self-regulating heat tape around the condensate trap and along the entire length of the condensate drain in the unconditioned space. See Figure 4.

When the condensing horizontal gas furnace is installed in an unconditioned space where the temperature would be capable of reaching close to or below 32°F (0°C). a self-regulating heat tape is required on the condensate drain, along with an insulation wrap. The heat tape should meet the following requirements:

a. The heat tape must be UL

b. The heat tape must be

CAUTION

listed.

installed per the manufacturer’s instructions for the entire length of drain pipe in the unconditioned space.

HEAT TAPE

TRAP

I526

c. The heat tape should be rated

at 5 or 6 watts per foot at

20V.

IMPORTANT: Support this unit when installed. Since this furnace is suitable for attic or crawl space installation, it may be installed on combustible wood flooring or by using support brackets. See

Figure 5.

5. IMPORTANT: If installing in a

utility room, be sure the door is wide enough to:

a. allow the largest part of the

furnace to pass; or

b. allow any other appliance

(such as a water heater) to pass.

6. IMPORTANT: This furnace is not approved or recommended for installation on its back, with access doors facing upwards.

FIGURE 5

HORIZONTAL FURNACE INSTALLED W/SUPPORT BRACKETS

IPE

RAP

NTAKE

ENT

ELECTRICAL CONDUIT

XHAUST

I522

CLEARANCE ACCESSIBILITY

The design of forced air furnaces with input ratings as listed in the tables under Figures 6, 7, and 8 are certified by CSA-International for the clearances to combustible materials shown in inches.

See name/rating plate and clearance label for specific model number and clearance information.

Service clearance of at least 24 inches is recommended in front of all furnaces.

NOTE: Use recommended 24” clearance if accessibility clearances are greater than fire protection clearances.

WARNING

UPFLOW AND HORIZONTAL FURNACES ARE DESIGNCERTIFIED FOR INSTALLATION ON COMBUSTIBLE FLOORS. NOTE, HOWEVER, THAT FURNACES MUST NOT BE INSTALLED DIRECTLY ON CARPETING, TILE OR OTHER COMBUSTIBLE MATERIAL OTHER THAN WOOD FLOORING. INSTALLATION ON A COMBUSTIBLE MATERIAL CAN RESULT IN FIRE, CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Upflow furnaces are shipped with a bottom closure panel installed. When bottom return air is used, remove the panel by removing the two screws attaching the panel to the front base angle. See Figure 51.

SITE SELECTION

1. Select a site in the building near the center of the proposed, or existing, duct system.

2. Give consideration to the vent system piping when selecting the furnace location. Be sure the venting system can get from the furnace to the termination with minimal length and elbows.

3. Locate the furnace near the existing gas piping. Or, if running a new gas line, locate the furnace to minimize the length and elbows in the gas piping.

4. Locate the furnace to maintain proper clearance to combustibles as shown in the following tables.

WARNING

DO NOT LIFT THE UNIT BY THE HEAT EXCHANGER TUBES. DOING SO CAN CRACK THE HEAT EXCHANGER ASSEMBLY AND CAUSE CO2 TO BE RELEASED INTO THE ENVIRONMENT, WHICH CAN RESULT IN PERSONAL INJURY OR DEATH.

WARNING

COMBUSTIBLE MATERIAL MUST NOT BE PLACED ON OR AGAINST THE FURNACE JACKET. THE AREA AROUND THE FURNACE MUST BE KEPT CLEAR AND FREE OF ALL COMBUSTIBLE MATERIALS INCLUDING GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS. PLACEMENT OF COMBUSTIBLE MATERIALS ON, AGAINST OR AROUND THE FURNACE JACKET CAN CAUSE AN EXPLOSION OR FIRE RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. THE HOMEOWNER SHOULD BE CAUTIONED THAT THE FURNACE AREA MUST NOT BE USED AS A BROOM CLOSET OR FOR ANY OTHER STORAGE PURPOSES.

FIGURE 6

CLEARANCE TO COMBUSTIBLES, UPFLOW UNITS

WGTS

BACK TOP FRONT VENT

SIDE SIDE

LEFT RIGHT SHIP

⁄32 0 0 0 1 2* 0 111

⁄32 0 0 0 1 2* 0 117

⁄32 0 0 0 1 2* 0 124

⁄8 0 0 0 1 2* 0 137

⁄32 0 0 0 1 2* 0 148

⁄32 0 0 0 1 2* 0 152

⁄8 2 15 13

⁄2 17

⁄8 2 18

⁄16 2 18

2 DIA.

GAS CONNECTION

⁄32 15

⁄32 19

UPFLOW MODELS MINIMUM CLEARANCE (IN.)

MODEL A B C D E F

⁄2 16

045 17

060 17

075 17

⁄32 19

075 21 19

090 21 19

105 21 19

*A service clearance of at least 24 inches is recommended in front of all furnaces.

AIRFLOW

AIR

⁄8

RETURN

2 DIA.

AIR

SUPPLY

GAS CONNECTION

⁄16

I392

FIGURE 7

CLEARANCE TO COMBUSTIBLES, DOWNFLOW UNITS

WGTS

BACK TOP FRONT VENT

SIDE SIDE

LEFT RIGHT SHIP

⁄8 0 0 0 1 2* 0 111

⁄8 0 0 0 1 2* 0 117

⁄8 0 0 0 1 2* 0 137

⁄8 0 0 0 1 2* 0 148

⁄8 13

⁄8 2 16

⁄8 0 0 0 1 2* 0 160

⁄8 17

⁄8 20

⁄8 2 23

⁄16 2 20

⁄16

2 DIA.

ALT. GAS

CONNECTION

⁄8

⁄32 15

⁄32 19

DOWNFLOW MODELS MINIMUM CLEARANCE (IN.)

⁄2 16

045 17

060 17

MODEL A B C D E F

⁄32 22

⁄2 23

075 21 19

090 21 19

105 24

*A service clearance of at least 24 inches is recommended in front of all furnaces.

AIR

SUPPLY

AIRFLOW

AIR

RETURN

GAS CONNECTION

2 DIA.

NOTE: IN DOWNFLOW CONFIGURATION, OPTIONAL AIR CUTOUT IS NOT PERMITTED.

I393

FIGURE 8

CLEARANCE TO COMBUSTIBLES, HORIZONTAL UNITS

WGTS

BACK TOP FRONT VENT

SIDE SIDE

LEFT RIGHT SHIP

⁄8 0 0 0 1 2* 0 111

⁄8 0 0 0 1 2* 0 117

⁄8 0 0 0 1 2* 0 137

⁄8 0 0 0 1 2* 0 148

⁄8 13

⁄8 2 16

⁄8 0 0 0 1 2* 0 160

⁄8 17

⁄8 20

⁄8 2 23

⁄16 2 20

IMPORTANT: This furnace is not approved or recommended for

installation on its back, with access doors facing upwards.

⁄32 15

⁄32 19

DOWNFLOW MODELS MINIMUM CLEARANCE (IN.)

⁄2 16

045 17

060 17

MODEL A B C D E F

⁄32 22

⁄2 23

075 21 19

090 21 19

105 24

*A service clearance of at least 24 inches is recommended in front of all furnaces.

⁄16

GAS

2 DIA.

CONNECTION

2 DIA.

ALT. GAS

CONNECTION

⁄8

I520

DUCTING

JACKET

DRILL (2) 3/16" DIA. HOLES

8.000

4.875

1.531

roper air flow is required for the

orrect operation of this furnace.

oo little air flow can cause erratic

peration and can damage the heat

xchanger. The duct system must

arry the correct amount of air for

eating and cooling if summer air

onditioning is used.

c Size the ducts according to

acceptable industry standards and methods. The total static pressure drop of the air distribution system should not exceed 0.5" w.c.

NOTE: Return air grilles and warm air registers must not be obstructed

WARNING

NEVER ALLOW THE PRODUCTS OF COMBUSTION FROM THE FLUE TO ENTER THE RETURN AIR DUCTWORK OR THE CIRCULATED AIR SUPPLY. ALL RETURN DUCTWORK MUST BE ADEQUATELY SEALED AND SECURED TO THE FURNACE WITH SHEET METAL SCREWS; AND JOINTS, TAPED. ALL OTHER DUCT JOINTS MUST BE SECURED WITH APPROVED CONNECTIONS AND SEALED AIRTIGHT. WHEN AN UPFLOW FURNACE IS MOUNTED ON A PLATFORM WITH RETURN THROUGH THE BOTTOM, IT MUST BE SEALED AIRTIGHT BETWEEN THE FURNACE AND THE RETURN AIR PLENUM. THE FLOOR OR PLATFORM MUST PROVIDE SOUND PHYSICAL SUPPORT OF THE FURNACE WITHOUT SAGGING, CRACKS, OR GAPS, AROUND THE BASE, PROVIDING A SEAL BETWEEN THE SUPPORT AND THE BASE.

FAILURE TO PREVENT PRODUCTS OF COMBUSTION FROM BEING CIRCULATED INTO THE LIVING SPACE CAN CREATE POTENTIALLY HAZARDOUS CONDITIONS, INCLUDING CARBON MONOXIDE POISONING THAT COULD RESULT IN PERSONAL INJURY OR DEATH.

DO NOT, UNDER ANY CIRCUMSTANCES, CONNECT RETURN OR SUPPLY DUCTWORK TO OR FROM ANY OTHER HEAT PRODUCING DEVICE SUCH AS A FIREPLACE INSERT, STOVE, ETC. DOING SO MAY RESULT IN FIRE, CARBON MONOXIDE POISONING, EXPLOSION, PERSONAL INJURY OR PROPERTY DAMAGE.

IMPORTANT: Some high efficiency

filters have a greater than normal resistance to air flow. This can adversely affect furnace operation. BE SURE TO CHECK AIR FLOW.

IMPORTANT: When using outside air, design and adjust the system to maintain a return air temperature ABOVE 50° F during the heating season.

UPFLOW UNITS

1. Position the unit to minimize long runs of duct or runs of duct with many turns and elbows.

2. Open the return air compartment.

WARNING

UPFLOW FURNACE: A SOLID METAL BASE PLATE MUST BE

NSTALLED IN THE FURNACE

I BOTTOM WHEN USING SIDE RETURN. FAILURE TO INSTALL A BASE PLATE COULD CAUSE THE PRODUCTS OF COMBUSTION TO CIRCULATE INTO THE LIVING SPACE AND CREATE POTENTIALLY HAZARDOUS CONDITIONS, INCLUDING CARBON MONOXIDE POISONING OR DEATH.

a. Cut an opening in the side.

The opening should be cut the full width of the knockouts on the unit. See Figure 9.

NOTE: Where the maximum air flow is 1800 CFM or more, both sides or the bottom must be used for return air.

3. Connect the return duct or return air cabinet to the unit. Make the connection air tight to prevent entraining combustion gases from an adjacent fuel-burning appliance.

4. Be sure to have adequate

space for the unit filter.

NOTE: DO NOT take return air

from bathrooms, kitchens, furnace rooms, garages, utility or laundry rooms, or cold areas.

NOTE: DO NOT use a rear air return.

FIGURE 9

CUTOUT AND DRILL INFORMATION

5. If summer air conditioning is desired, position the indoor coil on the top of the unit. Insure that no air can bypass this coil.

. Connect the supply air plenum to

the furnace plenum opening.

IMPORTANT: If a flexible duct connector must be used, it

be rated for a minimum

MUST temperature of 250°F continuous.

DOWNFLOW UNITS

1. Position the unit to minimize long

uns of duct or runs of duct with

r many turns and elbows.

2. If summer air conditioning is desired, position the indoor coil on the bottom of the unit. Insure that no air can bypass this coil.

3. If installing on a combustible floor

and not using an air conditioning plenum, install the

special non-combustible floor base. See Figure 10.

WARNING

THE DOWNFLOW FURNACE DESIGN IS CERTIFIED FOR INSTALLATION ON A NONCOMBUSTIBLE FLOOR. USE THE SPECIAL BASE SPECIFIED ON THE FURNACE CLEARANCE LABEL. FAILURE TO INSTALL THE SPECIAL BASE MAY RESULT IN FIRE, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. THIS SPECIAL BASE IS SHIPPED FROM THE FACTORY AS AN ACCESSORY.

4. Connect the furnace to the supply air plenum.

5. Connect the return air ducting to the return air opening at the top of the unit. Make the connection air tight to prevent entraining combustion gases from an adjacent fuel-burning appliance.

6. Be sure to have adequate

space for the unit filter. NOTE: DO NOT take return air

from bathrooms, kitchens, furnace rooms, garages, utility or laundry rooms, or cold areas.

HORIZONTAL UNIT

IMPORTANT: This furnace may only be installed so that when facing the front of the furnace, supply air is discharged on the left hand side.

1. Position the unit to minimize long runs or runs with many turns and elbows.

2. If summer air conditioning is desired, position the indoor coil on the left end of the unit. Insure that no air can bypass this coil.

3. Connect the furnace to the supply air plenum.

4. Connect the return air ducting to the return air opening at the right end of the unit. Make the connection air tight to prevent pulling combustion gases from an adjacent fuel-burning appliance.

FIGURE 10

COMBUSTIBLE FLOOR BASE

5. Be sure to have adequate

space for the unit filter. NOTE: DO NOT take return air

from bathrooms, kitchens, furnace rooms, garages, utility or laundry rooms, or cold areas.

VENTING AND COMBUSTION AIR PIPING

VENTING AND COMBUSTION AIR PIPING*

GENERAL INFORMATION

WARNING

READ AND FOLLOW ALL INSTRUCTIONS IN THIS SECTION. FAILURE TO PROPERLY VENT THIS FURNACE CAN CAUSE CARBON MONOXIDE POISONING OR AN EXPLOSION OR FIRE, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

This furnace removes both sensible and latent heat from the combustion flue gases. Removal of latent heat results in condensation of flue gas water vapor. This condensed water vapor drains from the secondary heat exchanger and out of the unit into a drain trap.

When installed as a non-direct vent furnace, only exhaust piping is required and inside combustion air may be used. Refer to section on “

COMBUSTION & VENTILATION AIR

FOR FURNACE INSTALLATIONS.” Direct vent installations require a

dedicated combustion air and venting system. All air for combustion is taken from the outside atmosphere and all combustion products are discharged to the outdoors.

WARNING

IN CANADA, PRODUCTS CERTIFIED FOR INSTALLATION

AND INTENDED TO BE VENTED WITH PLASTIC VENT SYSTEMS (PVC, CPVC) MUST USE VENT SYSTEMS THAT ARE CERTIFIED AND STAMPED TO THE STANDARD FOR TYPE BH GAS VENTING SYSTEMS, ULC S636.

THE COMPONENTS OF THE CERTIFIED MATERIAL MUST NOT BE INTERCHANGED WITH OTHER VENT SYSTEMS OR UNLISTED PIPE/FITTINGS.

PLASTIC COMPONENTS AND SPECIFIED PRIMERS AND GLUES OF THE CERTIFIED SYSTEM MUST BE FROM A SINGLE SYSTEM MANUFACTURER AND NOT

U.S. PIPE & FITTING MATERIAL*

Schedule 40 PVC (Pipe) D1785

Schedule 40 PVC (Cellular Core Pipe) F891

Schedule 40 PVC (Fittings) D2466

SDR-21PVC (Pipe) D2241

SDR-26 PVC (Pipe) D2241

Schedule 40 ABS Cellular Core DWV (Pipe) F628

Schedule 40 ABS (Pipe) D1527

Schedule 40 ABS (Fittings) D2468

ABS-DWV (Drain Waste & Vent) (Pipe & Fittings)

PVC-DWV (Drain Waste & Vent) (Pipe & Fittings)

*Starting in 2007, Canada allows ULC-S636 PVC or CPVC only.

INTERMIXED WITH OTHER SYSTEM MANUFACTURER’S PARTS.

NOTE: INLET AIR PIPING IS NOT CONSIDERED TO BE A PART OF THE “VENTING SYSTEM”. THE REQUIREMENT THAT VENT MATERIAL BE CERTIFIED TO ULC S636 DOES NOT APPLY TO INLET AIR PIPING.

The combustion air and vent pipe fittings must conform to American National Standards Institute (ANSI) and American Society for Testing Materials (ASTM) standards as shown below:

ASTM

SPECIFICATION

D2661

D2665

OVERTEMPERATURE SAFETY SWITCHES

Furnaces are equipped with safety switches in the control compartment to protect against overtemperature conditions caused by inadequate combustion air supply. The switches for the upflow and downflow models are located in the burner compartment. If a switch is tripped it must be manually reset.

WARNING

O NOT JUMPER THESE

EVICES! IF ONE OF THESE

WITCHES SHOULD TRIP, A

UALIFIED INSTALLER, SERVICE

GENCY OR THE GAS SUPPLIER

A MUST BE CALLED TO CHECK AND/OR CORRECT FOR ADEQUATE COMBUSTION AIR SUPPLY. DO NOT RESET THE SWITCHES WITHOUT TAKING CORRECTIVE ACTION TO ASSURE THAT AN ADEQUATE SUPPLY OF COMBUSTION AIR IS MAINTAINED UNDER ALL CONDITIONS OF OPERATION. FAILURE TO DO SO CAN RESULT IN CARBON MONOXIDE POISONING OR DEATH. IF THIS UNIT IS MOUNTED IN A CLOSET, THE DOOR MUST BE CLOSED WHEN MAKING THIS CHECK.

REPLACE THESE SWITCHES ONLY WITH THE IDENTICAL REPLACEMENT PART.

EXISTING VENT SYSTEMS*

*In Canada see ULC-S636 requirements.

When the installation of this furnace replaces an existing furnace that is removed from a vent system serving other appliances, the vent system is likely to be too large to properly vent the remaining attached appliances.

The following steps should be followed with each appliance remaining connected to the original common vent system. Place the appliance to be tested in operation, while the other appliances remaining connected to the common vent system are not in operation. Test the operation of each appliance individually by the following method.

1. Permanently seal any unused openings in the common venting system.

2. Visually inspect the venting system for proper size and horizontal pitch and determine that there is no blockage, restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.

3. If practical, close all building doors, windows and all doors between the space where the appliances remaining connected to the common venting system are located. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range

hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

4. Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so the appliance will operate continuously.

5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe.

6. After it has been determined that each appliance that remains connected to the common venting system properly vents (when tested as outlined above), return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous conditions of use.

7. If improper venting is observed during any of the above tests, the common venting system must be resized. See vent tables in these instructions

When the furnace is installed in the same space with other gas appliances such as a water heater, be sure there is an adequate supply of combustion and ventilation air for the other appliances. Do not delete or reduce the combustion air supply required by the other gas appliances in this space. See Z223.1, National Fuel Gas Code (NFPA54) for determining the combustion air requirements for gas appliances. An unconfined space must have at least 50 cubic feet (volume) for each 1,000 BTUH of the total input of all appliances in the space. If the open space containing the appliances is in a building with tight construction (contemporary construction), outside air may still be required for the appliances to burn and vent properly. Outside air openings should be sized the same as for a confined space.

JOINING PIPE AND FITTINGS

WARNING

PVC SOLVENT CEMENTS AND PRIMERS ARE HIGHLY FLAMMABLE. PROVIDE ADEQUATE VENTILATION AND DO NOT ASSEMBLE NEAR HEAT SOURCE OR AN OPEN FLAME. DO NOT SMOKE. AVOID SKIN OR EYE CONTACT. OBSERVE ALL CAUTIONS AND WARNINGS PRINTED ON MATERIAL CONTAINERS. FAILURE TO FOLLOW THESE GUIDELINES MAY RESULT IN FIRE, EXPLOSION OR ASPHYXIATION CAUSING PERSONAL INJURY OR DEATH.

All pipe, fittings, solvent cement, primers and procedures must conform to American National Standard Institute and American Society for Testing and Materials (ANSI/ASTM) standards in the U.S.

Pipe and Fittings - ASTM-D1785, D2466, D2665, D2231, D2661 and F628.

PVC Primer and Solvent Cement ASTM-D2564

ABS Pipe and Fittings - Use ABS Primer and Solvent Cement D2235

Procedure for Cementing Joints ASTM-D2855

IMPORTANT: The plastic combustion air and venting components are of PVC. If using ABS piping, ensure that the solvent cement is compatible for joining PVC to ABS components or use a mechanical connection that can withstand the vent temperatures and are corrosion resistant.

CEMENTING JOINTS

Properly seal all joints in the PVC vent using the following materials and procedures.

PVC CLEANER-PRIMER AND PVC MEDIUM-BODY SOLVENT CEMENT

IMPORTANT: After cutting pipe,

remove all ragged edges and burrs. This is important to prevent reduction in pressure drop throughout the system.

1. Cut pipe end square. Chamfer edge of pipe. Clean fitting socket and pipe joint area of all dirt, grease and moisture.

2. After checking pipe and socket for proper fit, wipe socket and pipe with cleaner-primer. Apply a liberal coat of primer to inside surface of socket and outside of pipe. Read instructions included with the primer for proper application.

3. Apply a thin coat of cement evenly in the socket. Quickly apply a heavy coat of cement to the pipe end and insert pipe into fitting with a slight twisting movement until it bottoms out.

NOTE: Cement must be fluid; if not, recoat.

4. Hold the pipe in the fitting for 30 seconds to prevent the tapered socket from pushing the pipe out of the fitting.

5. Wipe all excess cement from the joint with a rag. Allow 15 minutes before handling. Cure time varies according to fit, temperature and humidity.

NOTE: Stir the solvent cement frequently while using. Use a natural bristle brush or the dauber supplied with the can. The proper brush size is one inch.

IMPORTANT: For Proper Installation

DO NOT use solvent cement that has become curdled, lumpy or thickened.

DO NOT thin. Observe shelf precautions printed on containers.

For application below 32°F, use only low-temperature-type solvent cement.

COMBUSTION AND VENTILATION AIR

NON-DIRECT

Cleaning solvents (such as

FURNACE INSTALLATIONS

WARNING

THE FURNACE AND ANY OTHER

UEL-BURNING APPLIANCE

F MUST BE PROVIDED WITH ENOUGH FRESH AIR FOR PROPER COMBUSTION AND VENTILATION OF THE FLUE GASES. MOST HOMES WILL REQUIRE THAT OUTSIDE AIR BE SUPPLIED INTO THE FURNACE AREA. FAILURE TO DO SO CAN CAUSE PERSONAL INJURY OR DEATH FROM CARBON MONOXIDE POISONING.

Adequate facilities for providing air for combustion and ventilation must be provided in accordance with section

5.3, “Air for Combustion and Ventilation” of the National Fuel Gas Code, ANSI Z223.1 (latest edition) or applicable provisions for the local building codes, and not obstructed so as to prevent the flow of air to the furnace.

IMPORTANT: Air for combustion and ventilation must not come from a corrosive atmosphere. Any failure due to corrosive elements in the atmosphere is excluded from warranty coverage.

The following types of installation (but not limited to the following) will require OUTDOOR AIR for combustion, due to chemical exposures:

• Commercial buildings

• Buildings with indoor pools

• Furnaces installed in laundry rooms

• Furnaces in hobby or craft rooms

• Furnaces installed near chemical storage areas.

Exposure to the following substances in the combustion air supply (but not limited to the following) will also require OUTDOOR AIR for combustion:

• Permanent wave solutions

• Chlorinated waxes and cleaners

• Chlorine-based swimming pool chemicals

• Water softening chemicals

• De-icing salts or chemicals

• Carbon tetrachloride

• Halogen type refrigerants

• erchloroethylene)

• Printing inks, paint removers,

varnishes, etc.

• Hydrochloric acid

• Cements and glues

Antistatic fabric softeners for

•

clothes dryers

• Masonry curing and acid washing

materials

Combustion air must be free of acidforming chemicals such as sulphur, fluorine and chlorine. These elements are found in aerosol sprays, detergents, bleaches, cleaning solvents, air fresheners, paint and varnish removers, refrigerants and many other commercial and household products. When burned in a gas flame, vapors from these products form acid compounds. The acid compounds increase the dew point temperature of the flue products and are highly corrosive after they condense.

WARNING

ALL FURNACE INSTALLATIONS MUST COMPLY WITH THE NATIONAL FUEL GAS CODE AND LOCAL CODES TO PROVIDE ADEQUATE COMBUSTION AND VENTILATION AIR FOR THE FURNACE. FAILURE TO DO SO CAN RESULT IN EXPLOSION, FIRE, PROPERTY DAMAGE, CARBON MONOXIDE POISONING, PERSONAL INJURY OR DEATH.

Combustion air requirements are determined by whether the furnace is in an open (unconfined) area or in a confined space such as a closet or small room.

EXAMPLE 1: FURNACE LOCATED IN AN UNCONFINED SPACE

Using indoor air for combustion.

An unconfined space must have at least 50 cubic feet for each 1,000 BTUH of the total input for all appliances in the space. Here are a few examples of the room sizes required for different inputs. The sizes are based on 8-foot ceilings.

TUH Minimum Sq. Feet Typical Room Size

Input With 8' Ceiling With 8' Ceiling

5,000 281 14' x 20' OR 16' x 18'

0,000 375 15' x 25' OR 19' x 20'

5,000 469 15' x 31' OR 20' x 24'

0,000 563 20’ x 28’ OR 24’ x 24’

105,000 657 20' x 33' OR 26' x 25'

If the open space containing the furnace is in a building with tight construction, outside air may still be required for the furnace to operate and vent properly. Outside air openings should be sized the same as for a confined space.

EXAMPLE 2: FURNACE LOCATED IN A CONFINED SPACE

A confined space (any space smaller than shown above as “unconfined”) must have openings into the space which are located in accordance with the requirements set forth in the following subsections A and B. Size the openings by how they are connected to the heated area or to the outside, and by the input of all appliances in the space.

If confined space is within a building with tight construction, combustion air must be taken from outdoors or area freely communicating with the outdoors.

A. USING INDOOR AIR FOR

COMBUSTION

IMPORTANT: Air should not be taken from a heated space with a fireplace, exhaust fan or other device that may produce a negative pressure.

If combustion air is taken from the heated area, the openings must each have at least 100 square inches of free area. Each opening must have at least one square inch of free area for each 1,000 BTUH of total input in the space. Here are some examples of typical openings required.

TUH Free Area

nput Each Opening

5,000 100 square inches

0,000 100 square inches

5,000 100 square inches

90,000 100 square inches

105,000 105 square inches

FIGURE 11

AIR FROM HEATED SPACE

B. USING OUTDOOR AIR FOR

COMBUSTION

IMPORTANT: Do not take air from an attic space that is equipped with power ventilation.

The confined space must communicate with the outdoors in accordance with Methods 1 or 2. The minimum dimension of air openings shall not be less than 3 inches. Where ducts are used, they shall be of the same crosssectional area as the free area of the openings to which they connect.

Method 1 Two permanent openings, one located within 12 inches of the top and one located within 12 inches of the bottom of the enclosure, shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

a. Where directly communicating with the outdoors or where communicating to the outdoors

GAS

ATER

HEATER

through vertical ducts as shown in Figure 12, each opening shall have a minimum free area of 1 square inch for each 4,000 BTUH of total appliance input rating in the enclosure.

BTUH Free Area Round Pipe

Input Each Opening Size

45,000 11.25 square inches 4"

60,000 15.00 square inches 5"

75,000 18.75 square inches 5"

90,000 22.50 square inches 6"

105,000 26.25 square inches 6"

FURNACE

OTE:

N EACH OPENING SHALL HAVE A FREE AREA OF NOT

ESS THAN ONE SQUARE

L INCH PER 1,000 BTU PER H0UR OF THE TOTAL INPUT

ATING OF ALL

R EQUIPMENT IN THE ENCLOSURE, BUT NOT

ESS THAN 100 SQUARE

L INCHES.

b. Where communicating with outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch for each 2,000 BTUH of total input rating of all equipment in the enclosure (Seee Figure 13).

Here are some typical sizes:

BTUH Free Area Round Pipe

Input Each Opening Size

45,000 22.50 square inches 6"

60,000 30.00 square inches 6"

75,000 37.50 square inches 7"

90,000 45.00 square inches 8"

105,000 52.50 square inches 8"

FIGURE 12

AIR FROM ATTIC/CRAWL SPACE

OUTLET AIR IN ATTIC MUST BE ABOVE INSULATION

1 SQ. INCH PER

4000 BTUH

OUTLET AIR

FURNACE

GAS

WATER

HEATER

1 SQ. INCH PER 4000 BTUH INLET AIR

GABLE

VENT

OPTIONAL 1 SQ. INCH PER 4000 BTUH INLET AIR

VENTILATED ATTIC GABLE OR SOFFIT VENTS

12" MAX.

FIGURE 13

OUTSIDE AIR USING A HORIZONTAL DUCT

OUTLET AIR 1 SQ. INCH

FURNACE

GAS

WATER

HEATER

INLET AIR 1 SQ. INCH

12"

MAX.

PER 2000 BTUH

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