Installation Instructions

Transcription

1 Single-Stage Tables For Category I Fan-Assisted Furnaces Installation Instructions NOTE: Read the entire instruction manual before starting the installation. SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due gas and electrical components. Improper installation, adjustment, alterations, service, maintenance, or use can cause explosion, fire, electrical shock, asphyxiation, or other conditions which may cause personal injury, death, or property damage. Only trained and qualified personnel should install, repair, or service heating equipment. Wear safety glasses, protective clothing, and work gloves. Have a fire extinguisher available during start-up and adjustment procedures and service calls. Read these instructions thoroughly. Follow all warnings or cautions included in literature and attached equipment. Follow all safety codes including local building codes, the National Fuel Gas Code (NFGC) ANSI Z.-/NFPA - in the United States and the National Standard of Canada for Natural Gas and Propane Installation Codes (NSCNGPIC) CAN/CGA-B. and.-m and Amendment. in Canada. Recognize safety information. This is the safety-alert symbol alert the potential for personal injury.. When you see this symbol on the furnace and in instructions or manuals, be Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used identify unsafe practices which would result in minor personal injury or product and property damage. INTRODUCTION Category I furnaces operate with a nonpositive vent static pressure limit the potential for vent gas leakage, and operate with a flue loss not less than 7 percent limit the potential for condensation in the venting system. This information supplements the information found in the Installation, Start-Up, and Operating Instructions provided with this furnace. All venting instructions for Category I fan-assisted or induced-draft appliances are included in these instructions. Refer the Table Application Chart located on page determine the appropriate table use for the furnace type and vent type. References made in this publication the NFGC apply installations in the United States of America. References made the NSCNGPIC and Amendment. apply installations in Canada. ing systems for fan-assisted furnaces shall be made in accordance with of the above codes and all authorities having jurisdiction. GENERAL INSTRUCTIONS These instructions are for fan-assisted furnaces classified as Category I furnaces in accordance with ANSI Z.7 CAN/CGA-.-. Type-B connecr and vent pipe, single-wall metal connecr pipe, and/or lined masonry chimneys shall be used vent Category I furnaces in accordance with these venting instructions. s shall conform the standard for chimneys, fireplaces, vents, and solid fuel burning appliances ANSI/NFPA - in the United States and a Provincial or Terririal Building Code in Canada (in its absence, the National Building Code of Canada Standard). A clay tile chimney liner in poor condition can be relined in lieu of repairing or rebuilding if the rest of the chimney is in good condition. If the rest of the chimney is in poor condition, repairing or rebuilding is required. UL listed (ULC listed in Canada) metal liner or a UL listed Type-B vent pipe shall be used for relining. Rebuilding and repairing shall conform chimney standard. A chimney without a clay tile liner, which is otherwise in good condition, shall be rebuilt conform chimney standard or be lined with a UL listed (ULC listed in Canada) metal liner or UL listed Type-B vent. Relining with a listed metal liner or Type-B vent is considered be a vent-in-a-chase. If a metal liner or Type-B vent is used line a chimney, no appliance shall be vented in the annular space between the chimney and the metal liner. Clay tile-lined chimneys exposed the outdoors below the roof line may require relining with a listed metal liner reduce vent gas condensation in cold climates. Experience in local areas with standard drafthood-equipped furnaces will indicate whether exposed tile-lined chimneys have condensation problems. Fan-assisted furnaces installed in accordance with these instructions will not have chimney condensation problems if standard gas-fired drafthood-equipped furnaces installed in accordance with the NFGC or NSCNGPIC have not experienced condensation problems in exposed tile-lined chimneys. Form: IM-GAA- Cancels: IM-GAA-8 Printed in U.S.A. - Catalog. -GA-A

2 APPLIANCE APPLICATION REQUIREMENTS Appliance operation has a significant impact on the performance of the venting system. If the appliances are sized, installed, adjusted, and operated properly, the venting system and/or the appliances should not suffer from condensation and corrosion. The venting system and all appliances shall be installed in accordance with applicable listings, standards, and codes.. The furnace should be sized provide percent of the design heating load requirement plus any margin that occurs because of furnace model size capacity increments. Heating load estimates can be made using approved methods available from Air Conditioning Contracrs of America (Manual J), American Society of Heating, Refrigerating, and Air-Conditioning Engineers, or others. Excessive oversizing of the furnace could cause the furnace and/or vent fail prematurely.. When a metal vent or metal liner is used, the vent must be in good condition and be installed in accordance with the vent manufacturer s instructions.. When a masonry chimney is used, chimney construction must conform ANSI/NFPA and must be in good condition. Inspections before the sale and at the time of installation will determine the acceptability of the chimney or the need for repair and/or (re)lining. An inspection chart is included on page. If the inspection of a previously used tile-lined chimney: a. Shows signs of vent gas condensation, the chimney should be relined in accordance with these venting tables with a listed metal liner or Type-B vent reduce condensation. If a condensate drain is required by local code, refer the NFGC, Section 7. for additional information on condensate drains. b. Indicates the chimney exceeds the maximum permissible size in these tables, the chimney should be rebuilt or relined conform these instructions.. The return-air temperature must be at least F db except for brief periods of time during warm-up from setback at no lower than F db or during initial start-up from a standby condition.. The furnace shall be adjusted according the Installation, Start-Up, and Operating Instructions provided with the furnace for the following: a. Gas input rateinsufficient gas input rate can cause low vent gas temperatures causing condensation and corrosion in the furnace and/or venting system. Derating is permitted only for altitudes above ft. b. Midpoint of the air temperature rise rangelow air temperature rise can cause low vent gas temperature. c. Thermostat heat anticipation or cycle rate reduce short cycling.. Air for combustion must not be contaminated by halogen compounds which include chlorides, fluorides, bromides, and iodides. These compounds are found in many common home products such as detergent, paint, glue, aerosol spray, bleach, cleaning solvent, salt, and air freshener, and can cause corrosion of furnaces and vents. Avoid using such products in the combustion-air supply. Furnace use during construction of the building could cause the furnace be exposed halogen compounds, causing premature failure of the furnace or venting system due corrosion. 7. dampers on any appliance connected the common vent can cause condensation and corrosion in the venting system. Do not use vent dampers on appliances common vented with this furnace. These venting tables apply only appliances without vent dampers. VERTICAL VENT OR CHIMNEY SIZING AND INSTALLATION. The tables found on the following pages are based on the GAMA ing Tables, the NFGC, and the NSCNGPIC. These tables are designed be used with only Category I fan-assisted furnaces. The tables provide a simple method size typical vent and chimney installations without referring the GAMA ing Tables, the NFGC, and the NSCNGPIC. Additional venting and chimney configurations are possible by using the GAMA ing Tables, the NFGC, or the NSCNGPIC.. Refer the Installation Instructions titled VENTING TABLES CATEGORY I CENTRAL FURNACES, A.G.A., GAMA for full information concerning the requirements use metal vents and masonry chimneys for these furnaces. The following information and warning must be considered in addition the requirements defined in the GAMA ing Tables Section III General ing Requirements, the NFGC, and the NSCNGPIC. If a vent (common or dedicated) becomes blocked, the furnace will be shut off by the draft safeguard switch located on the inducer assembly. WARNING: Do not bypass the draft safeguard switch, as an unsafe condition could exist which must be corrected. Failure follow this warning could result in a build-up of carbon monoxide and lead personal injury or death. REMOVAL OF EXISTING FURNACES FROM COMMON VENT SYSTEM. In replacement installations where an existing vent system may be used, inspect the vent system for condition, size, type of material, and height meet the appliance application requirements. If it is oversized, condensation could corrode the venting system. Installation of a new venting system may be required.. When removing an existing furnace from a venting system serving other appliances, the vent system is likely be o large vent the remaining attached appliances properly. The following steps shall be followed with each appliance remaining connected the common venting system placed in operation, while the other appliances remaining connected the common venting system are not in operation. a. Seal any unused openings in the common venting system.

3 b. Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion, and other deficiencies which could cause an unsafe condition. c. Insofar as is practical, close all building doors and windows and all doors between space in which appliances remaining connected the common venting are located and other spaces of the building. Turn on clothes dryers and any appliance not connected 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. d. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance will operate continuously. e. Test for spillage at the drafthood relief opening after minutes of main burner operation. Use the flame of a match or candle. f. After it has been determined that each appliance remaining connected the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers, and any other gas-burning appliance their previous conditions of use. g. If improper venting is observed during any of the above tests, the common venting system must be corrected. The vent system or vent connecrs may need be resized according these instructions approach the minimum size using the appropriate GAMA ing Tables, Parts 7 and of the NFGC in the United States or Part 7 of the NSCNGPIC and Amendment. in Canada, and all authorities having jurisdiction.

4 CHIMNEY INSPECTION CHART For additional requirements refer the National Fuel Gas Code NFPA -/ANSI Z.- and ANSI/NFPA - s, Fireplaces, s, and Solid Fuel Burning Appliances in the U.S.A. or the Canadian Installation Codes CAN/CGA-B.M and.m and Amendment. in Canada. Crown condition: Missing mortar or brick? Rebuild crown. Is lined with clay tile, flexible metal liner, or Type- B vent? Is liner and p seal in good condition? Repair liner or p seal or reline chimney as necessary. Reline Repair Debris in cleanout? Mortar, tile, metal vent, fuel oil residue? Metal vent debris or liner debris? Remove metal vent or liner. Clay tile misalignment, missing sections, gaps? Condensate drainage at botm of chimney? Is chimney lined with properly sized, listed liner or Type-B vent? t suitable Line chimney with properly sized, listed flexible metal liner or Type-B vent per GAMA Sizing Tables and liner or vent manufacturer's installation instructions. exposed outdoors below roof line? Is chimney be dedicated a single fan-assisted furnace? Consult venting instructions for suitability for common-venting. Suitable is acceptable for use. A

5 VENT TABLE APPLICATION REQUIREMENTS The use of these tables is restricted as follows:. = t Recommended ( Pressurization or Condensation May Occur).. For connecr or vent configurations between table entries, such as vent heights, connecr rises, and/or laterals: a. Connecr sizechoose the larger of the connecr sizes. b. Minimum vent size (Tables,,,, and )Choose the larger of the vent sizes. c. imum vent size (Tables and )Choose the smaller of the vent sizes. If of the sizes is, the GAMA ing Tables may give a usable size. See EXAMPLE : INTERPOLATION BETWEEN TABLE ENTRIES on page.. Installations may be up, ft altitude. See tables for altitudes at which the common vent connecrs or dedicated (Single Appliance) vents may be installed. altitude limitation is required for a common vent or chimney or for drafthood-equipped water heater connecr. Although appliance input shall be derated percent per ft above sea level starting at ft altitude, use the sea level input in these vent tables. In Tables through (Except Table ), the code letters indicate the highest altitudes at which connecrs or dedicated vents shall be installed.. A vent or chimney may be offset as noted in the second table below and as shown in Fig.,,, 7, or 8.. For chimneys exposed the outdoors, refer venting General Instruction section.. Common-vented appliances only: a. One Category I fan-assisted furnace with Category I drafthood-equipped, MBH input or less water heater. b. Size common vent and furnace connecrs per vent tables through 8. Size the connecr and vent () from the same FURNACE INPUT column. c. For water heater connecrs, refer vent table. d. connecrs may be manifolded (common-vented below the vent) as noted in the second table below and as shown in Fig.. A manifolded connecr shall be sized as a common vent (not a connecr) with the same table used size the connecrs and common vent. If the vent or furnace connecr is Type-B, the manifolded connecr shall also be Type-B. For a chimney sized with Table 7 or 8, single-wall pipe may be used for a manifolded connecr, but Type-B is recommended. e. dampers shall not be used on water heaters. 7. For dedicated-vent furnaces, size per vent tables and. 8. Use the GAMA venting tables for additional configurations.. For additional requirements, refer the NFGC Parts 7 and in the U.S.A. and the NSCNGPIC Part 7 and Amendment. in Canada. NOTE: These vent tables are based on the GAMA ing Tables, the NFGC Parts 7 and in the U.S.A., and the NSCNGPIC Part 7 and Amendment. in Canada. Type-B Masonry Type-B Masonry VENT AND TYPES Table Application Chart USE TABLE NO. -Stage Furnace COMMON VENT Type-B Connecr or Single-Wall Connecr or Type-B Connecr or Single-Wall Connecr 7 or 8 DEDICATED VENT Type-B Connecr N/A Single-Wall Connecr N/A Type-B Connecr N/A Single-Wall Connecr N/A Manifolded Connecr and Offset (or ) Application Requirement OR VENT INSIDE DIA (IN.) 7 8 RECTANGULAR LINER OUTSIDE DIMENSIONS X 8 N/A N/A N/A 8 X 8 8 X X Limum Horizontal Length (Ft) 7... N/At Applicable NOTE: Use as shown in Fig.,,,, 7, and 8.

6 A Fig. Use With Tables and Fig. Use With Tables and A Fig. Use With Tables and A Fig. Use With Tables 7 and 8 A

7 A Fig. Manifolded Connecrs for Use With Tables through 8 A Fig. Masonry Offset for Use With Tables through 8 Table Type-B Common Type-B Connecr For Up To Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Drafthood Outlet Connecr. D B B J J J J J J. D B B D D J J J J. D* B* B* D D C E D J Fan-Assisted Furnace, Type-B Connecr Inside meter With Up To Elbows Common ed With Drafthood-Equipped With Up To MBH Input J J J J J J J J J J* J* J* J J J J J J J J J J J J H J J J J J J J * H* * J J J J J J J J J H* * * J J J* J* J* TYPE-B DOUBLE-WALL COMMON VENT INSIDE DIAMETER Minimum J J J imum in ,, in. 7. J J J 7. J* J* J* J J 7. J J J J J Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J * Connecr horizontal length shall not exceed ft. Connecr horizontal length shall not exceed ft. Increase the common vent by table size for manifolded connecr and/or common vent offset. See Application Requirements. and. d. NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each connecr shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements. 7

8 Table Type-B Common Type-B Connecr For Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Drafthood Outlet Connecr. D B B D D J J J J. D B B D D C E D J. D* B* B* D D C E D D Fan-Assisted Furnace, Type-B Connecr Inside meter With Elbows Common ed With Drafthood-Equipped With Up To MBH Input J J J J J J J J J D* J* J* J J J J J J J J J J J J H J J J J J * H* * J J H H* H* * J H H J J* J* J* J J TYPE-B DOUBLE-WALL COMMON VENT INSIDE DIAMETER Minimum J J J J J imum in ,, in. 7. J J J J J 7. 7 H* J* J* J J J J J 7. J J J J J J Table Type-B Common Single-Wall Connecr For Up To Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Drafthood Outlet Connecr Fan-Assisted Furnace, Single-Wall Metal Connecr Inside meter With Up To Elbows Common ed With Drafthood-Equipped With Up To MBH Input A A A D C A A A A A A* A* A* TYPE-B DOUBLE-WALL COMMON VENT INSIDE DIAMETER Minimum imum in ,, in. 7. B D D C 7. D D C. Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J * Connecr horizontal length shall not exceed ft. Connecr horizontal length shall not exceed ft. Increase the common vent by table size for manifolded connecr and/or common vent offset. See Application Requirements. and. d. NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each connecr shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements. 8

9 Table Type-B Common Single-Wall Connecr For Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Drafthood Outlet Connecr Fan-Assisted Furnace, Single-Wall Metal Connecr Inside meter With Elbows Common ed With Drafthood-Equipped With Up To MBH Input A A A TYPE-B DOUBLE-WALL COMMON VENT INSIDE DIAMETER Minimum imum in. 7 7,, in. Increase the common vent by table size for manifolded connecr and/or common vent offset. See Application Requirements. and, d. 7. A A A 7.. Table Tile-Lined Masonry Common ed Type-B Connecr For Up To Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Clay-Tile Liner Drafthood Outlet Connecr. J H J J H J J H * 8 X or 8-in. diameter at -ft height.. H J H J H Fan-Assisted Furnace, Type-B Connecr Inside meter With Up To Elbows Common ed With Drafthood-Equipped With Up To MBH Input J H G J J H J J H J H G J J H J J H J J H J J H J J J J J J J J J H J J J J J J J J H J J J J J LINER NOMINAL RECTANGULAR DIMENSIONS (OUTSIDE) OR CIRCULAR INSIDE DIAMETER Minimum 8 X 8 or * 8 X 8 or * 8 X 8 or * 8 x 8 or 7 * 8 X 8 or 7 * 8 X 8 or 7 * imum in. 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7,, in. X or X or X or X or X or X or J J J J J J J J J. J Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each connecr shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements.

10 Table Tile-Lined Masonry Common ed Type-B Connecr For Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Clay-Tile Liner Drafthood Outlet Connecr. H J H J H Fan-Assisted Furnace, Type-B Connecr Inside meter With Elbows Common ed With Drafthood-Equipped With Up To MBH Input J H G J J H J J H J H G J J H J J H C J H J J H H J J J J J J J J H G J H J J J J J H H G H H J LINER NOMINAL RECTANGULAR DIMENSIONS (OUTSIDE) OR CIRCULAR INSIDE DIAMETER Minimum 8 X 8 or * 8 X 8 or * 8 X 8 or * 8 X 8 or 7 * 8 X 8 or 7 * 8 X 8 or 7 * imum in. 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7,, in. X or X or X or X or X or X or J J J J 7. J 7. J J J J. J J J Table7 Tile-Lined Masonry Common ed Single-Wall Connecr For Up To Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Clay-Tile Liner Drafthood Outlet Connecr Fan-Assisted Furnace, Single-Wall Metal Connecr Inside meter With Up To Elbows Common ed With Drafthood-Equipped With Up To MBH Input B A B A A A A 7. A A B A A B A A 7. B A A B A A LINER NOMINAL RECTANGULAR DIMENSIONS (OUTSIDE) OR CIRCULAR INSIDE DIAMETER Minimum 8 X 8 or 7 * 8 X 8 or 7 * 8 X 8 or 7 * imum in. 8 X 8 or 7 8 X 8 or 7 8 X 8 or 7,, in. X or X or X or. Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J * 8 X or 8-in. diameter at -ft height. NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each connecr shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements.

11 Table8 Tile-Lined Masonry Common ed Single-Wall Connecr For Elbows FURNACE INPUT (MBH) FLUE COLLAR SIZE Clay-Tile Liner Drafthood Outlet Connecr. * 8 X or 8-in. diameter at -ft height Fan-Assisted Furnace, Single-Wall Metal Connecr Inside meter With Elbows Common ed With Drafthood-Equipped With Up To MBH Input A 7. B A A B A A 7. LINER NOMINAL RECTANGULAR DIMENSIONS (OUTSIDE) OR CIRCULAR INSIDE DIAMETER Minimum 8 X 8 or 7 * 8 X 8 or 7 * imum in. 8 X 8 or 7 8 X 8 or 7,, in. X or X or. Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each connecr shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements.

12 Table Connecr For Up To MBH Input WATER HTR INPUT (MBH) MAX NUMBER OF ELBOWS Connecr. * * * * * * *. * * *.. Drafthood-Equipped, Single-Wall or Type-B Double-Wall Metal Connecr Inside meter Common ed With Fan-Assisted Furnace * * * * * Three-in. diameter connecrs are permitted only with water heaters which have -in. diameter drafthood outlets. Do not connect a -in. diameter connecr a -in. diameter or larger drafthood outlet. Connecr horizontal length shall not exceed ft. NOTE: Refer the Table Application Requirements in front of these tables for other application requirements. A Fig. 7Use With Table Fig. 8Use With Table A

13 Table Dedicated Type-B and Type-B Connecr For Fan-Assisted Furnace FURNACE INPUT (MBH) FLUE COLLAR SIZE TOTAL MAX NO. OF ELBOWS IN VENT AND ( Elbows with Zero Lateral) Lateral (Ft) F G D H D Conn and Min E A G D H D J E A A H J E A J G A B 8J A A 8J 7D A A D 8J 7H B B D J J G J J J E B J F C Conn and Min J J G J J J E B J J J F C J J G J J J E B J J J F C J J G J J J E B J J J F C 8J A C B 8J A A A B 8J 8J A A C J J J J J J J J J G J J J J J H B Conn and Min J J J J J J J G J J J J H B J H J J J J G J J J J H H J J J F C J J J J H J C 8A D J A 8B B A J H A C A B J J J J J J J J J J J J J J C Conn and Min J J J G J J J J J C J G J J J H C G J H C J G A 8A J J A 8A D J J A 8A 8A A Conn and Min J J J J J F F F J J J F J E A A J H D A 8B 8A J J E A A 8B G Conn and Min J J J J J J J J J J J F Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each vent shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements. J H E A J J A A B A J J B B A A

14 Table Dedicated Type-B and Single-Wall Connecr For Fan-Assisted Furnace FURNACE INPUT (MBH) FLUE COLLAR SIZE TOTAL MAX NO. OF ELBOWS IN VENT AND ( Elbows with Zero Lateral) Lateral (Ft) B A C B D B Conn and Min A B B B B B B A C B D B A A Conn and Min A A B A A B A A B A A B A C B G F A H G B H G B Conn and Min F A G B G B F G B G B A G B G B A A A A A B A A B J J A J J F A J J F B Conn and Min D A J F A J F B D A J A J F B D A E A F A D D A E E A A F F A B J G C J H D A J J J A Conn and Min G C H D A D A G C H D A D A A H D A D A A A C A A D A B B D A J F A J G B J G C Conn and Min F G B G C G B G C C G B G C Altitude Code Letters Table MAXIMUM ALTITUDE ABOVE SEA LEVEL (FT) TO 7 8, Letter Code A B C D E F G H J NOTES:. The letter codes next the connecr sizes indicate the highest altitudes at which each vent shall be installed. See Application Requirement. and the Altitude Code Letters Table.. Refer the Table Application Requirements in front of these tables for other application requirements. C C F A D A G A C

15 EXAMPLE : COMMON VENTING INTO A MASOY CHIMNEY See Fig.. An 88, Btu/hr -stage, fan-assisted furnace with a -in. diameter flue collar is be common vented with a, Btuh drafthood-equipped water heater with a -in. diameter drafthood outlet. The common vent is an existing -ft tall masonry chimney with flues. The gas appliance flue is an 8- X -in. nominal size clay-tile liner with a -ft offset above the fireplace. The chimney flue is ft from the water heater drafthood outlet. The furnace flue collar is ft from the chimney flue. The headroom above the furnace and water heater is ft and ft, respectively. Including entrance in the chimney, elbows will be required route each connecr the chimney. RISE: The water connecr rise will be ft permit clearance combustible construction. The furnace connecr rise will be ft permit the furnace connecr enter the chimney below the water heater connecr. (The water heater is in. taller than the furnace.) FURNACE : Try size single-wall connecrs with tile-lined masonry chimney from Table 8. When trying enter the table at ft Height, the table skips from ft. See Table Application Requirement. on page. Try ft Height with ft Connecr Rise, and try ft Height with ft Connecr Rise. Move across the table the Furnace Input column 8- MBH and the Connecr Horizontal Length column ft. The connecr sizes shown are and, which means that single-wall pipe is not recommended for this application. Try Type-B connecr pipe. Enter Table in the same way as Table 8. At ft Height, ft of Connecr Rise, and at ft Height, ft of Connecr Rise for 8- MBH Furnace Input, and ft of Connecr Horizontal Length, Table requires -in. and -in. Type-B connecrs respectively. A -in. Type-B connecr should be used because the entries above and below the ft Height are both -in. connecrs. ALTITUDE LIMITATION: The code letter J next the connecr size indicates the maximum altitude. If the gas input rate is properly derated, the Altitude Code Letters Table at botm of page indicates the maximum altitude at which this furnace connecr size shall be used (, ft above sea level in this instance). MASOY CHIMNEY: Continue down the same column the Clay-Tile Liner Minimum and imum sizes, 8 X 8 and X in., respectively. The 8 X -in. nominal liner fits within that range. Check the table titled Manifolded Connecr and Offset (or ). See table on page for L-imum Horizontal Length in the 8- X -in. column. The -ft offset is less than the maximum horizontal length,. ft. If the connecrs are joined before they enter the chimney flue as shown in Fig., L-imum Manifolded Horizontal Connecr Length is ft for a -in. Type-B manifolded connecr in the same table. Select the manifolded connecr diameter, in. from Table, Clay-Tile Liner Minimum and imum Circular Inside meter in the 8- MBH column, which permits - -in. diameters. WATER HEATER : Enter Table at ft Height, ft of Connecr Rise, MBH Input, Elbows, and ft Connecr Horizontal Length. A -in. diameter connecr is required. Type-B and single-wall connecr pipe are permitted. altitude restrictions apply vent connecrs for drafthood-equipped water heaters or common vents with a drafthood-equipped water heater. EXAMPLE : INTERPOLATION BETWEEN TABLE ENTRIES Use the same installation as in Example except when furnace connecr rise is ft instead of ft. Determine the furnace connection size. Enter Table. When trying enter the table at ft Height, the table skips from ft. See Table Application Requirement. on page. Try ft Height with ft of Connecr Rise, and try ft Height with ft of Connecr Rise. Move across the table the Furnace Input column 8- MBH and the Connecr Horizontal Length column ft. The connecr sizes shown are in. and in., respectively. A -in. connecr should be used because the Table Application Requirement..a. indicates choose the larger of the connecr sizes. The code letters H and J next connecr sizes and indicate the maximum altitudes. Use the altitude code letter H for the chosen connecr size (in this instance, in.).

16 A. PRE-INSTALLATION. Proper Furnace Size House heating load Furnace output capacity. Inspection condition Installation Check Sheet size (Flue Liner Inside and Outside Dimensions) Common vent Dedicated vent Signs of condensation Tile lined if masonry. and Connecr Sizing Furnace input Furnace connecr size/type Table in./ Water heater less than MBH Water heater drafthood outlet diameter Water heater connecr size/type (Table ) Manifolded connecr size/type (if required) Manifold length (if required) Offset length (if required) size/type in./ in./ in./ Btuh Btuh Btuh in. ft ft B. POST-INSTALLATION. Gas Input Rate Adjusted Btuh. Temperature Rise Set Rating plate mid-point F/ F Furnace setting F/ F. Thermostat Heat Anticipar Setting amps Three cycles per hr on electronic. Self-Test Operation OK CAC / BDP P.O. Box 7, Indianapolis, IN imgaa Catalog. -GA-A