Rheem RGRM, RGTM Installation Manual

Name: Rheem RGRM
Brand: Rheem
SKU: 8817730
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INSTALLATION INSTRUCTIONS

FOR UPFLOW, DOWNFLOW/HORIZONTAL HIGH EFFICIENCY CONDENSING TWO-STAGE GAS FURNACES

RGRM, RGTM 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.

ISO 9001:2008

92-24161-84-06

SUPERSEDES 92-24161-84-05

INSTALLATION CHECK LIST

REFER TO INSTALLATION INSTRUCTIONS

GAS SUPPLY

______ Adequate pipe size

______ Correct 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

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 Temperature

TERMINATIONS – DIRECT VENT

VERTICAL

______ Intake – 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, -D03) – US (RXGY-D02A, RXGY-D03A) – CANADA

______ Correct relationship – exhaust to intake

______ 12" min. above grade/snow level

HORIZONTAL – ALTERNATE

(RXGY-D02, -D03 OR -D04) – US (RXGY-D02A, -D03A, -D04A) – CANADA

______ Correct relationship – exhaust to intake

______ Above anticipated snow level

VENTING – NON-DIRECT VENT

______ in. diameter – exhaust pipe

______ ft. of pipe – exhaust

______ 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 Number

_____________________________ Date of 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 warnings for products sold in California that contain, or produce, any of over 600 listed chemicals known to the State of California to cause cancer or birth defects such as fiberglass insulation, lead in brass, and combustion products from 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 and the State of 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.

CONTENTS
Safety Precautions ...................................................................................................	1
Installation Check List ..............................................................................................	2
General Information..................................................................................................	4
Safety Information ....................................................................................................	7
Location Requirements and Considerations ............................................................	9
Ducting ...................................................................................................................	14
Venting and Combustion Air Piping .......................................................................	16
Combustion and Ventilation Air..............................................................................	18
Vent Pipe Installation..............................................................................................	21
Condensate Drain/Neutralizer................................................................................	34
Gas Supply and Piping...........................................................................................	38
Electrical Wiring......................................................................................................	42
Accessories ............................................................................................................	43
High Altitude Installations .......................................................................................	44
Start-Up Procedures...............................................................................................	47
Integrated Furnace Control and ECM Motor Settings............................................	48
Two Stage 90’s w/Elm (GRM’s & GTM’s) ..............................................................	50
Air Flow...................................................................................................................	52
Maintenance...........................................................................................................	53
Troubleshooting......................................................................................................	57
Wiring Diagrams.....................................................................................................	59

GENERAL INFORMATION

NOTE: A load calculation must be performed to properly determine the required furnace BTU size for the structure. Also, the duct must be properly designed and installed for proper airflow. Existing ductwork must be inspected for proper size and sealed system. Proper airflow is necessary for both user comfort and equipment performance.

Before opening the furnace carton and installation of the furnace, verify the data tags on the carton and inside the furnace, match and is what was ordered from the local distributor. Also, check for any damage to the furnace before installation.

IMPORTANT: Proper application, installation and maintenance of this furnace and system is a must if consumers are to receive the full benefits for which they have paid.

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

1.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 burners through a special air 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 from 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:

CSA-INTERNATIONAL

178 Rexdale Blvd.

Toronto, Ontario

Canada M9W, 1R3

NOTE: It is our recommendation that any HVAC equipment which were subject to flooding be replaced to avoid any risk of property damage, personal injury or death. Also, our position that the immersion by flood waters compromises any HVAC products thus voiding this warranty.

NOTE: Models having option code 320 added at the end of the model number designation are shipped factory ready for a horizontal only installation. The drain trap for downflow installation is not included in the parts bag for these appliances.

IMPORTANT: Remove bracket from models where applicable. See Figure 1.

FIGURE 1

FIGURE 2

UPFLOW FURNACE COMPONENTS DOWNFLOW/HORIZONTAL FURNACE COMPONENTS

AIRFLOW	3	15 12 23	22
			9
	2
			8
	21		4

			20						AIRFLOW
									AIRFLOW
			25
			19
			5
			26
			18
									17
			10
					11				1
			25		11	7	13	6	14
ITEM		9	SHIPPING PLUG (TO BE REMOVED)	19	INDUCED DRAFT BLOWER
NO.	PART NAME	10	FLAME SENSOR*	20	CAPACITOR*
1	CONDENSATE TRAP	11	OVERTEMPERATURE SWITCH*	21	BLOWER
2	DOOR SWITCH	12	TOP PLATE	22	LOW VOLTAGE TERMINAL
3	JUNCTION BOX	13	BURNER	23	CONTROL MOUNTING PLATE
4	TRANSFORMER	14	IGNITER*	24	FILTER / SOLID METAL BASEPLATE
5	PRESSURE SWITCHES	15	COMBUSTION AIR INLET		(UPFLOW UNITS ONLY)
6	EXHAUST TRANSITION	16	OPTIONAL AIR INLET (UPFLOW UNITS ONLY)	25	POWER FACTOR CORRECTION CHOICE*
7	CONNECTOR	17	OPTIONAL GAS INLET	26	AIR CIRCULATING BLOWER*
8	OUTLET AIR PIPE	18	GAS VALVE

*These components may be only partially visible in this photo.

NOTE: A PARTS BAG IS INCLUDED WITH THE FURNACE. IF A NEW PARTS BAG NEEDS TO BE ORDERED, USE THE FOLLOWING PART NUMBERS: AS-100717-01 FOR -GRM-45, -GRM-60, -GRM-75, GRM-90 AND GRM-105 AS-100717-02 FOR -GRM-120.

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 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

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.

FIGURE 3

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

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 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. SEE ACCESSORIES SECTION OF THESE INSTRUCTIONS FOR AUXILIARY HORIZONTAL OVERFLOW PAN INFORMATION (MODEL RXBM).

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.

SAFETY INFORMATION

IMPORTANT!

THE COMMONWEALTH OF MASSACHUSETTS REQUIRES COMPLIANCE WITH REGULATION 248 CMR 4.00 AND 5.00 FOR INSTALLATION OF THROUGH- THE-WALL 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 as 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 identifies “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 all 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.

! WARNING

USE ONLY WITH TYPE OF GAS APPROVED FOR THIS FURNACE. REFER TO THE FURNACE RATING PLATE.

! WARNING

INSTALL THIS FURNACE ONLY IN A LOCATION AND POSITION AS SPECIFIED IN THE LOCATION REQUIREMENTS AND 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 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

NEVER TEST FOR GAS LEAKS 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 INSTRUCTIONS.

! 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 THAN 18 INCHES ABOVE THE 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

THE FURNACE MAY BE USED FOR HEATING OF BUILDINGS OR STRUCTURES UNDER CONSTRUCTION.

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 AND CODES.

NOTICE

LOCATION REQUIREMENTS AND CONSIDERATIONS

GENERAL INFORMATION

! 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 living area, be certain to install an auxiliary condensate drain pan under the entire unit. This auxiliary drain pan should extend under any evaporator coil installed with the furnace and the open portion of the condensate 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.

3.IMPORTANT: Install the furnace level. If it is not level, condensate cannot drain properly, possibly 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.

4.IMPORTANT: 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. 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 listed.

b.The heat tape must be installed per the manufacturer’s instructions for the entire length of drain pipe in the unconditioned space.

c.The heat tape should be rated at 5 or 6 watts per foot at 120V. See Figure 4.

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.

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.

c.allow service clearance

FIGURE 4

HORIZONTAL FURNACE W/HEAT TAPE ON CONDENSATE TRAP

AIRFLOW

DRAIN

PIPE

HEAT

TAPE

TRAP

I526

! CAUTION

THIS FURNACE IS NOT APPROVED OR RECOMMENDED FOR INSTALLATION ON ITS BACK, WITH ACCESS DOORS FACING UPWARDS OR IN ANY HORIZONTAL CONFIGURATION.

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. See Figure 5.

4.Locate the furnace to maintain proper clearance to combustibles as shown in following Figures 6, 7, 8.

! WARNING

DO NOT LIFT THE UNIT BY THE HEAT EXCHANGER TUBES. DOING SO CAN DAMAGE THE HEAT EXCHANGER ASSEMBLY.

	CLEARANCE -			Upflow furnaces are shipped with a
	ACCESSIBILITY			bottom closure panel installed.
				When bottom return air is used,
	The design of forced air furnaces with			remove the panel by removing the
	input ratings as listed in the tables			two screws attaching the panel to
	under Figures 6, 7, 8 are certified by			the front base angle. See filter
	CSA-International for the clearances			section for details.
	to combustible materials shown in
				! WARNING
	inches.
	See name/rating plate and clearance			COMBUSTIBLE MATERIAL MUST
				NOT BE PLACED ON OR AGAINST
	label for specific model number and
				THE FURNACE JACKET. THE
	clearance information.
				AREA AROUND THE FURNACE
	Service clearance of at least 24
				MUST BE KEPT CLEAR AND FREE
	inches is recommended in front of
				OF ALL COMBUSTIBLE
	all furnaces.
				MATERIALS INCLUDING

	NOTE: Use recommended 24”			GASOLINE AND OTHER
	clearance if accessibility clearances			FLAMMABLE VAPORS AND
	are greater than fire protection			LIQUIDS. PLACEMENT OF
	clearances.			COMBUSTIBLE MATERIALS ON,
				AGAINST OR AROUND THE
	! WARNING
				FURNACE JACKET CAN CAUSE
	UPFLOW FURNACES ARE DESIGN-			AN EXPLOSION OR FIRE
	CERTIFIED FOR INSTALLATION			RESULTING IN PROPERTY
	ON COMBUSTIBLE FLOORS.			DAMAGE, PERSONAL INJURY OR
	NOTE, HOWEVER, THAT			DEATH. THE HOMEOWNER
	FURNACES MUST NOT BE			SHOULD BE CAUTIONED THAT
	INSTALLED DIRECTLY ON			THE FURNACE AREA MUST NOT
	CARPETING, TILE OR OTHER			BE USED AS A BROOM CLOSET
	COMBUSTIBLE MATERIAL OTHER			OR FOR ANY OTHER STORAGE
	THAN WOOD FLOORING.			PURPOSES.
	INSTALLATION ON A
	COMBUSTIBLE MATERIAL CAN
	RESULT IN FIRE, CAUSING
	PROPERTY DAMAGE, PERSONAL
	INJURY OR DEATH.

FIGURE 5
HORIZONTAL FURNACE INSTALLED W/SUPPORT BRACKETS
GAS
PIPE
	INTAKE
	VENT
	ELECTRICAL
	CONDUIT
AIRFLOW	EXHAUST
	FAN

	TRAP
	I522

171/2

1611/32 155/8

1325/32

111

CLEARANCE

6FIGURE

UPFLOW MODELS

MINIMUM CLEARANCE (IN.)

MODEL

LEFT

RIGHT

BACK

TOP

FRONT

VENT

SHIP

SIDE

WGTS

171/2

1611/32

155/8

1325/32

117

07B

1927/32

191/8

181/2

179/32

145

COMBUSTIBLES,

SUPPLY

RETURN

AIR

1927/32

191/8

181/2

179/32

148

UNITSUPFLOW

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

AIRFLOW

267⁄16

2 DIA.

2 DIA. KNOCKOUT

GAS CONNECTION

ALT. GAS CONNECTION

275⁄8

OPTIONAL

OPTIONAL RETURN AIR

RETURN

AIR CUTOUT

CUTOUT (EITHER SIDE)*

(EITHER SIDE)*

I392

*BOTH SIDES FOR 1800 CFM AND ABOVE

I392.DGN

I393

RETURN

AIR

SUPPLY

AIR

DOWNFLOW MODELS

MINIMUM CLEARANCE (IN.)

MODEL

LEFT

RIGHT

BACK

TOP

FRONT

VENT

SHIP

SIDE

WGTS

171⁄2

1611⁄32

155⁄8

165⁄8

137⁄8

117

07A

171⁄2

1611⁄32

155⁄8

165⁄8

137⁄8

123

07B

1927/32

193/16

181/2

179/32

123

1927⁄32

193⁄16

201⁄8

173⁄8

148

1927⁄32

193⁄16

201⁄8

173⁄8

152

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

		AIRFLOW
		2513⁄16
	2 DIA.	2 DIA.
	2 DIA.	ALT. GAS CONNECTION
	GAS	ALT. GAS CONNECTION
	CONNECTION
		43⁄8
		A103501.DGN

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

CLEARANCE	7 FIGURE
UNITS DOWNFLOW COMBUSTIBLES, TO

SUPPLY

AIR

I520

2 DIA.

GAS

CONNECTION

AIRFLOW

HORIZONTAL MODELS

MINIMUM CLEARANCE (IN.)

MODEL

LEFT

RIGHT

BACK

TOP

FRONT

VENT

SHIP

SIDE

WGTS

171⁄2

1611⁄32

155⁄8

165⁄8

137⁄8

117

07A

171⁄2

1611⁄32

155⁄8

165⁄8

137⁄8

123

07B

1927⁄32

193⁄16

201⁄8

173⁄8

123

1927⁄32

193⁄16

201⁄8

173⁄8

148

1927⁄32

193⁄16

201⁄8

173⁄8

152

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

RETURN AIR

CLEARANCE	8 FIGURE
UNITS HORIZONTAL COMBUSTIBLES, TO

DRAIN TRAP LOCATION

43⁄8

2 DIA. ALT. GAS CONNECTION

2513⁄16

NOTE: In horizontal configuration, return air cutout is not permitted. Horizontal left-hand airflow only.

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

A103601.DGN

DUCTING

Proper air flow is required for the correct operation of this furnace. Too little air flow can cause erratic operation and can damage the heat exchanger. The duct system must carry the correct amount of air for heating and cooling if summer air conditioning is used.

! WARNING

SOME HEATING AIRFLOW VALUES MAY BE HIGHER THAN THOSE REQUIRED FOR COOLING. BE SURE TO SIZE DUCT FOR THE MAXIMUM POSSIBLE AIRFLOW VALUE.

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.

! 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 AND STATIC PRESSURE.

IMPORTANT: When using outside air, design and adjust the system to maintain a return air temperature ABOVE 55° F during the heating season.

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

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 REMAIN IN THE FURNACE BOTTOM WHEN USING SIDE AIR 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. FOR BOTTOM RETURN, REMOVE SOLID METAL BASE PLATE.

a.Cut an opening in the side. The opening should be cut the full width and height 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.

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

6.Connect the supply air plenum to the furnace plenum opening.

IMPORTANT: If a flexible duct connector must be used, it MUST be rated for a minimum temperature of 250°F. continuous.

FIGURE 9

UPFLOW CUTOUT AND DRILL INFORMATION

JACKET

DRILL (2) 3/16" DIA. HOLES

8.000

4.875

1.531

DOWNFLOW UNITS

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

2.If summer air conditioning is desired, position the indoor coil on the supply-air side 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 Table 1 and 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.

NOTE: In downflow configuration, return air cut out is not permitted.

6.Be sure to have adequate space for the unit filter.

TABLE 1

NON-COMBUSTIBLE FLOOR BASES

Floor Base	Size
No.	Cabinet
(-)XGC-B17	17
(-)XGC-B21	21

(-)XGC-B24	24

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 AS WHEN FACING THE FRONT OF THE FURNACE, SUPPLY AIR IS DISCHARGED ON THE LEFT HAND SIDE.

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

2.If summer air conditioning is desired, position the indoor coil on the supply air side 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.

NOTE: In horizontal configuration, return air cut out is not permitted.

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.

FIGURE 10

NON-COMBUSTIBLE FLOOR BASE

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.

The combustion air and vent pipe fittings must conform to American National Standards Institute (ANSI) and American Society for Testing Materials (ASTM) standards D1785 (Schedule 40 PVC), D2665 (PVC-DWV), D2241 (SDR-21 and

SDR26-26 PVC), D2661 (ABS-DWV) or F628 (Schedule 40 ABS-DWV).

! 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 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 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.

IMPORTANT: The plastic combustion air and venting components are of Schedule 40 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 is corrosion resistant.

NOTE: Schedule 40 ABS-DWV pipe and fittings may be used as an alternate to PVC pipe for the combustion air inlet and vent pipes.

NOTE: Cellular core PVC is also approved for use. It must be schedule 40PVC-DWV cellular pipe for nonpressure applications and manufactured under ASTM F-891.

NOTE: With the furnace correctly vented, the inducer will move approximately 25 cfm per 100,000 Btu’s.

IMPORTANT: No part of the combustion air and vent pipes may run under ground.

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 are located in the burner compartment. If a switch is tripped it must be manually reset.

! WARNING

DO NOT JUMPER THESE DEVICES! IF ONE OF THESE SWITCHES SHOULD TRIP, A QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER 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

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.

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.

IMPORTANT: Only the current vent instructions apply. All 90 Plus Gas Furnaces cannot be common vented.

	JOINING PIPE AND		1. Cut pipe end square. Chamfer
	FITTINGS		edge of pipe. Clean fitting socket
			and pipe joint area of all dirt,
			grease and moisture.
	! WARNING
			2. After checking pipe and socket
	PVC SOLVENT CEMENTS AND
			for proper fit, wipe socket and
	PRIMERS ARE HIGHLY		pipe with cleaner-primer. Apply
	FLAMMABLE. PROVIDE		a liberal coat of primer to inside
	ADEQUATE VENTILATION AND DO		surface of socket and outside of
	NOT ASSEMBLE NEAR HEAT		pipe. Read instructions included
	SOURCE OR AN OPEN FLAME. DO		with the primer for proper
	NOT SMOKE. AVOID SKIN OR EYE		application.
	CONTACT. OBSERVE ALL		3. Apply a thin coat of cement
	CAUTIONS AND WARNINGS
			evenly in the socket. Quickly
	PRINTED ON MATERIAL
			apply a heavy coat of cement to
	CONTAINERS. FAILURE TO
			the pipe end and insert pipe into
	FOLLOW THESE GUIDELINES
			fitting with a slight twisting
	MAY RESULT IN FIRE, EXPLOSION
			movement until it bottoms out.
	OR ASPHYXIATION CAUSING
			NOTE: Cement must be fluid; if
	PERSONAL INJURY OR DEATH.
			not, recoat.
	All pipe, fittings, solvent cement,
			4. Hold the pipe in the fitting for 30
	primers and procedures must
			seconds to prevent the tapered
	conform to American National
			socket from pushing the pipe out
	Standard Institute and American
			of the fitting.
	Society for Testing and Materials
			5. Wipe all excess cement from the
	(ANSI/ASTM) standards as shown
	below:		joint with a rag. Allow 15 minutes
			before handling. Cure time varies
	CEMENTING JOINTS		according to fit, temperature and
			humidity.
	Properly seal all joints in the PVC		NOTE: Stir the solvent cement
	vent using the following materials and
			frequently while using. Use a natural
	procedures.
			bristle brush or the dauber supplied
	PVC CLEANER-PRIMER AND
			with the can. The proper brush size is
	PVC MEDIUM-BODY SOLVENT		one inch.
	CEMENT		IMPORTANT: For Proper Installation
	IMPORTANT: After cutting pipe,
			DO NOT use solvent cement that
	remove all ragged edges and burrs.
			has become curdled, lumpy or
	This is important to prevent reduction
			thickened.
	in pressure drop throughout the
			DO NOT thin. Observe shelf
	system.
			precautions printed on containers.

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

PIPE & FITTING MATERIAL		ASTM
PIPE & FITTING MATERIAL		SPECIFICATION
		SPECIFICATION
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)		D2661
(Pipe & Fittings)		D2661
(Pipe & Fittings)
PVC-DWV (Drain Waste & Vent)		D2665
(Pipe & Fittings)		D2665
(Pipe & Fittings)

COMBUSTION AND VENTILATION AIR

NON-DIRECT

FURNACE INSTALLATIONS

! WARNING

THE FURNACE AND ANY OTHER FUEL-BURNING APPLIANCE 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

•Cleaning solvents (such as perchloroethylene)

•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.

BTUH	Minimum Sq. Feet	Typical Room Size
Input	With 8' Ceiling	With 8' Ceiling

45,000	281	14' x 20' OR 16' x 18'

60,000	375	15' x 25' OR 19' x 20'

75,000	469	15' x 31' OR 20' x 24'

90,000	563	20’ x 28’ OR 24’ x 24’

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

120,000	750	25' x 30' OR 24' x 32'

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.

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