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Residential Gas Furnaces
Installation Instructions
G6RC Series 90+ Upflow Condensing Furnace
G6RD Series 93+ Upflow Condensing Furnace
G6RL Series 90+ Downflow Condensing Furnace
G6RC 90+, G6RD 93+ Upflow G6RL 90+ Downflow
!
! FOR YOUR SAFETY:
WARNING:
Do not store or use gasoline or other
Improper installation, adjustment, al-
flammable vapors and liquids in the
teration, service, or maintenance can
vicinity of this or any other appliance.
cause injury or property damage. Re-
fer to this manu
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Table of Contents Furnace Specifications ............................................................................................................ 4-5 Furnace Airflow Data .......................................................................................................... 6-7 Installation Requirements .......................................................................................................... 8 Supply Air Plenum Installation ................................................
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FURNACE SPECIFICATIONS Figure 1. G6RC, G6RD Unit Dimensions 4 Upflow G6RC & G6RD Furnaces Combustion Air Inlet A 23 1/4" Exhaust Vent B 22 1/2" 3/4" Combustion Air 3/4" 2 1/4" C Vent 19 3/4" 27 5/8" (See Fig. 15 3/4" 3/4" for sizes) 2" PVC Exhaust Vent (See Fig. 15 25 1/8" for sizes) 1 1/2" x 3 1/2" Dia. 1 1/2" x 3 1/2" Dia. Opening for Opening for Gas Connection Gas Connection 7/8" Dia. Electric 7/8" Dia. Electric + Connection 43" Connection + 25 5/8" 25 1/4" 33" 30 1/4" 25 1/4" 20 1/2" 1
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Figure 2. G6RL Unit Dimensions 5 Downflow G6RL Furnace Combustion Air Inlet 24 1/2" A Exhaust Vent 22 1/2" 3/4" Exhaust 27 7/8" Vent B 3/4" 3/4" 2" 3/4" 2 1/2" C C L Combusting 24 7/8" 24 7/8" Vent 7/8" Dia. Electric (3" for 80/100 7/8" Dia. Connection 43" 2" for 40/60) Electric Connection 21 7/8" 1 1/2" x 3 1/2" Dia. Opening for 1 1/2" x 2 1/2" Gas Connection Knockout For Gas Connection 21 1/2" 21 1/4" 21 1/2" 15 1/2" 21 7/8" 8" 10 1/4" Bottom Supply Air Opening (Side) D 19 3/4" 1" Condensat
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CAPACITIES —Furnace Airflow Data Table 1. Furnace Airflow Data 6 Heating External Static Pressure (Inches Water Column) Model Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Number (Btuh) Speed HP CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise High* 950 36 920 38 890 39 850 41 800 43 750 46 690 50 630 55 G6RC040C-08 40,000 Medium 1/5 740 47 710 49 680 51 650 53 600 58 550 63 490 - 430 - Low** 620 56 590 59 560 62 520 - 470 - 410 - 350 - 290 - High* 1330 - 1280 - 1230
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Table 2. Furnace Airflow Data 7 Heating External Static Pressure (Inches Water Column) Model Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Number (Btuh) Speed HP CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise High* 1620 - 1560 45 1490 47 1430 49 1365 52 1300 54 1240 57 1170 60 1450 49 1400 50 1350 52 1295 54 1240 57 1180 60 1120 63 1060 66 G6RD080C-14 80,000 Med-High 1/2 Med-Low** 1255 56 1225 57 1180 60 1145 61 1105 64 1060 66 1020 69 980 72 Low 1080 65 1055 67 10
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• NFPA-90B - Warm Air Heating and Air INSTALLATION REQUIREMENTS Conditioning Systems. Requirements and Codes This furnace must be installed in accordance These publications are available from: with these instructions, all applicable local build- National Fire Protection Association, Inc. ing codes, and the current revision of the Na- Batterymarch Park tional Fuel Gas Code (ANSI-Z223.1, NFPA-54). Quincy, Massachusetts 02269 The current revision of the National Fuel Gas Code is available from: Am
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Location HORIZONTAL INSTALLATIONS The furnace must be installed on a level surface, The G6RC model furnaces are approved for and as close to the center of the air distribution horizontal installation. Installation Kit #903568 system as possible. See Table 3 for overall is required for horizontal applications. Follow dimensions to determine the required clear- the installation instructions in the kit for proper ances in hallways, doorways, stairs, etc. to allow conversion. NOTE: The G6RD and G6R
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9.25" * Smaller dimensions for 18.75" G6RL 040/060 or 13.25"* Concrete Furnace Floor Sheet 2.0" Metal Plenum 16.75" 28.38" or 11.25"* Figure 4. Furnace on a Concrete Slab 1.50" 19.63" 18.75" 13.25" 1.58" 19.63" 19.63" 3" 19.75" Hole in Hole in or 14.25"* Floor Floor Figure 7. Downflow Sub-Base Dimensions G6RL 080/100 G6RL 040/060 If outside air is utilized as return air to the furnace Figure 5. Opening in Wood Floor for ventilation or to improve indoor air quality, the system mus
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An important consideration in selecting one or two pipe installation is the quality of the combus- ! WARNING: tion air. Indoor air is sometimes contaminated with various household chemicals which can Products of combustion must not be cause severe corrosion in the furnace combus- allowed to enter the return air ductwork tion system. Some common sources of these or the circulating air supply. Failure to chemicals are detergents, bleaches, aerosol prevent products of combustion from sprays, an
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- - - - - - - - - Vent or Each opening Chimney Vent or to outside must Each opening must Chimney be at least be at least 100 sq. in. 1 sq. in. per or 1 sq. in. per 1000 4000 Btuh of Btuh of total input total input rating. rating, whichever is greater. See minimum area per table. - - - - - - - 12" - - Max 12" Max. Furnace Furnace - - - - - - - - - 12" Max. Water Heater 12" Max Minimum Total Input Free Area Round Duct Rating (Btuh) (Each Opening) Diameter Water Heater 40,000 10 sq. in.
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Vent or An unconfined space is an area including all Chimney rooms not separated by doors with a volume greater than 50 cubic feet per 1,000 Btuh of the combined input rates of all appliances which draw combustion air from that space. For example, a space including a water heater rated at 45,000 Btuh and a furnace rated at 75,000 Btuh requires Air Duct a volume of 6,000 cubic feet [50 x (45 + 75) = Air Duct must be 6,000] to be considered unconfined. If the space at least Furnace 1 sq. in. h
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inches of free area. See Figure 9. For example, NORDYNE condensing furnaces are classified as "Category IV" appliances, which require spe- if the combined input rate of all appliances is less than or equal to 100,000 Btuh, each opening cial venting materials and installation proce- must have a free area of at least 100 square dures. Category IV appliances operate with positive vent pressure and therefore require inches. If the combined input rate of all appli- ances is 120,000 Btuh, each openi
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with piping of selected diameter and number of NOTE: Always use the same or larger size elbows. This table applies to the length and num- piping for combustion air as is used for the ber of elbows for each pipe. To use the table, the exhaust vent. furnace input rate, the centerline length and the number of elbows on each pipe must be known. Vent Pipe Installation Choose the diameter for which the tabulated length Pipe Routing and Support is equal to or greater than required. Route piping as di
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G6RC & G6RD Upflow Furnaces Exhaust Inlet See Vent Table 4 5/8" Seal/Caulk around Pipe Straps or Other Suitable at Building Supports at Minimum of 5 ft. Intervals Coupling 90˚ Elbow Combustion Offset with Exhaust Pipe for Adequate Dimensional Clearance Upward Pitch - 1/4" per Foot 12" Min. Outlet Exhaust Vent 7" PVC or First Support Placed ABS Pipe as Close to Furnace Wall Connection as Possible Normal Snow Level Exhaust Vent Straight Neoprene Coupling with 2 Hose Clamps* (Optional - Not Shown)
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Support System on G6RC & G6RD Upflow Vertical Rise Below Joints Furnaces Support System with first support as close 5' to furnace as Possible Combustion Exhaust Air Pipe Vent Upward Pitch Straight Neoprene Couplings with 1/4" per Foot 2 Hose Clamps* (Optional - Not Shown) Cabinet Furnace Front Support System on G6RL Downflow Furnaces Vertical Rise Below Joints Support System with first support as close 5' to furnace as Possible Exhaust Combustion Vent Air Pipe Straight Neoprene Rubber Couplings
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12 in. min 12 in. min 4 ft. min Piping must be mechanically supported so that tween vent piping and combustible surfaces. its weight does not bear on the furnace. Sup- However, it is good practice to allow space for ports must be at intervals no greater than five convenience in installation and service. feet, and at smaller intervals if necessary to ensure that there are no sagging sections to trap Location of Outdoor Terminations water. (See Figures 14 and 15.) Vent and combustion air intake
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5. The vent termination for a 1-pipe installa- Vent Configuration to tion shall be a minimum of 3 ft. above any Provide 12" Minimum forced air inlet within 10 ft. height above Snow Level. 6. The vent termination shall be located at 12" Min. 19" Max. least 4 ft. horizontally from any electric meter, gas meter, regulator and any relief Support Outside 12" Above equipment. These distances apply ONLY to Wall Normally U.S. installations. In Canada, the Canadian Expected Fuel Gas Code takes precedenc
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3. Apply couplings to the vent pipe on the b. The top of the chimney is sealed and interior and exterior sides of the wall to weatherproofed. insure the pipe can not be pushed or pulled c. The termination clearances shown in through the wall. Figure 20 are maintained. 4. Insure the combustion air inlet pipe (for a 2 d. No other gas fired appliances are vented pipe installation) has a 90 degree termina- through the chimney. tion elbow as shown in Figures 19 and 20. Vent Freezing Protection Note t
