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Gas Furnaces
Installation Instructions
*RC 92+ Full Size Upfl ow Condensing Furnace
*RL 90+ Full Size Downfl ow Condensing Furnace
*RC 92+ Upfl ow *RL 90+ Downfl ow
!
! FOR YOUR SAFETY:
WARNING:
Do not store or use gasoline or other
Improper installation, adjustment,
fl ammable vapors and liquids in the vi-
alteration, service, or maintenance
cinity of this or any other appliance.
can cause injury or property damage.
Refer to this manual for assistance.
For additional information consult a
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2
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Table of Contents Furnace Specifi cations ............................................................................................................ 4-5 Furnace Airfl ow Data .......................................................................................................... 6-7 Safety Information ....................................................................................................................... 8 Installation Requirements ...............................................
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FURNACE SPECIFICATIONS Figure 1. Upfl ow Unit Dimensions 4 Upfl ow *RC Furnaces Combustion Air Inlet ‡ A 23 1/4" Exhaust Vent ‡ B 22 1/2" 3/4" Combustion Air 3/4" ‡ C 2 1/4" Vent 3" 19 3/4" 27 5/8" (See Fig. 15 3/4" 3/4" for sizes) 2" PVC Exhaust Vent (See Fig. 15 for sizes) 25 1/8" 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" 15"
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Figure 2. Downfl ow Unit Dimensions 5 Downfl ow *RL Furnace Combustion Vent ‡ 3/4" Exhaust Vent C (3" for 80/100 Combustion Air Inlet 2" Dia. 2" for 40/60) 24 1/2" ‡ A 3/4" Exhaust Vent 22 1/2" 19 3/4" 3/4" 3/4" ‡ B 2 1/2" C L 24 7/8" 24 7/8" 7/8" Dia. Electric 7/8" Dia. Electric Connection Connection 43" 21 7/8" 21 7/8" 1 1/2" x 2 1/2" 21 1/2" 1 1/2" x 3 1/2" Dia. Knockout For 21 1/2" Gas Connection Opening for Gas Connection 15 1/2" 21 1/4" 10 1/4" 8" 1" 19 3/4" Condensate D Bottom Opening D
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CAPACITIES —Furnace Airfl ow Data Table 1. Furnace Airfl ow Data 6 G6RC UPFLOW FURNACE Model Heating External Static Pressure (Inches Water Column) Number Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 *RC- (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 55 040( )-08A 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 -
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CAPACITIES —Furnace Airfl ow Data continued Table 2. Furnace Airfl ow Data 7 Model Heating External Static Pressure (Inches Water Column) Number Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 *RL- (Btuh) Speed HP CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise High* 1280 - 1210 - 1180 - 1140 - 1090 - 1070 - 1030 - 990 - 040()-12 40,000 Medium 1/3 1140 - 1090 - 1060 - 1030 - 980 35 950 36 910 37 870 39 Low** 875 39 835 41 820 41 805 42 780 43 770 44 760 45 750 45 High*
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American National Standards Institute, Inc. SAFETY INFORMATION 1430 Broadway New York, New York 10018 1. Use only with type of gas approved for this Canada installations shall comply with CAN/CGA- furnace. Refer to the furnace rating plate. B149 installation codes, local plumbing or waste 2. Install this furnace only in a location and water codes and other applicable codes. position as specifi ed on Table 4 of these Additional helpful publications are: instructions. • NFPA-90A - Installati
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Shipping Dimensions (inches) Model Furnace Weight Number Btuh (lbs) ABCD *RC040 40,000 14 1/4 12 3/4 5 1/8 11 3/4 133 *RC060 60,000 14 1/4 12 3/4 5 1/8 11 3/4 140 *RC080 80,000 19 3/4 18 1/4 7 7/8 17 1/4 172 *RC100 100,000 19 3/4 18 1/4 7 7/8 17 1/4 180 *RC120 120,000 22 1/2 21 9 1/4 20 204 *RL040 40,000 14 1/4 12 3/4 4 5/8 12 3/4 135 *RL060 60,000 14 1/4 12 3/4 4 5/8 12 3/4 135 *RL080 80,000 19 3/4 18 1/4 10 18 1/4 174 *RL100 100,000 19 3/4 18 1/4 10 18 1/4 185 *RL120 120,000 22 1/2 21 12 1/2 2
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(b) For direct-vent appliances, mechanical- This furnace is certifi ed for use on wood fl ooring. vent heating appliances or domestic hot The furnace must be installed on a solid surface water equipment where the bottom of the and must be level front to back and side to side. vent terminal and the air intake is installed This furnace must not be installed directly on above four feet above grade the following carpeting, tile, or any combustible material other requirements must be satisfi ed: th
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5/8" Vinyl Cap 1/4" Vinyl Cap Grey Tubing 3" to 2" Reducer (Optional) PVC Tee PVC Reducer Bushing Soft Tubing 1/2" Vinyl Pressure Switch Soft Looped to Provide Cap Drain Trap Tubing a Drain Trap Figure 3. 90+ Upfl ow Converted for Horizontal Installation (Horizontal Right) 3" to 2" Reducer Pressure Switch Drainage Port (Optional) (Condensate) is Downard Vinyl Cap Alternative Pressure Soft Tubing for Switch Horizontal Vent PVC Tee Reducer Bushing Soft Tubing Looped to Provide a Drain Trap 1/4"
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NOTE: To avoid condensate freezing in the drain When a cooling system is installed which uses the trap assembly and tubing, insulate around furnace blower to provide airfl ow over the indoor the drain trap assembly and all tubing located coil, the coil must be installed downstream (on the in unconditioned space. outlet side) or in parallel with the furnace. If a cooling system is installed in parallel with the NOTE: When converting the furnace, to horizontal furnace, a damper must be install
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NOTE: If the furnace is operated without ade- Return Air quate air for combustion and ventilation, it may not The return air ductwork may be connected to any perform properly. Furnace components may be or all of the following: left side return, right side strained by high temperature and could fail . return, or bottom return. Tables 1 and 2 show the airfl ow data for each furnace model. Where maximum airfl ow is 1800 CFM or more two ! WARNING: openings must be used. Furnace installation
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9.25" Downflow Wood Sub-base Furnace Floor Sheet Protective Metal Upfl ow Models Screen Plenum Downfl ow Models Figure 8. Furnace on a Wood Floor Figure 10. Protective Screen for * RL 040/060 One Pipe Installations ** RL 120 18.75" or 13.25" or 21.50"* Each opening must be at least 100 sq. in. or 1 sq. in. per 1000 Btuh of total input Vent or rating, whichever is Chimney 2.0" greater. See minimum area per table. 16.75" 28.38" or 11.25" 12" Max. Furnace 1.50" 19.63" 12" Max. Wa
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- - - - - - - - - Vent or Chimney Vent or Each opening Chimney to outside must be at least 1 sq. in. per 4000 Btuh of total input rating. Ventilation Louvers (each end of attic) - - - - - - - 12" - - Max Outlet NOTE: Air open- ings shall each Air have a free area Water of not less than Furnace Furnace one square inch Heater per 4,000 Btuh of the total input rat- Alternate ing of all equipment - - - - Inlet Air - Air Inlet in the enclosure. - - - - Water Heater 12" Max Minimum Total Input
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from entering the combustion system. It should Combustion Air Quality be installed on the combustion air intake collar The recommended source of combustion air is or inlet PVC. If furnace location is such that this to use the outdoor air supply. However, the use opening might be unintentionally obstructed, a 3” of indoor air in most applications is acceptable PVC elbow must be installed on the collar, and except as follows: the screen placed inside the inlet of the elbow. 1. If the f
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The size and other criteria for these openings must be per the following sections. ! CAUTION: Do not supply combustion air from an Combustion air openings must not be restricted in any manner. attic space that is equipped with power ventilation or any other device that may Furnaces installed in a confi ned space which produce a negative pressure. supply circulating air to areas outside of the space must draw return air from outside the VENTING REQUIREMENTS space and must have return air
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Vent Pipe Material ! WARNING: Vent and combustion air pipe and fi ttings must be one of the following materials and must conform CARBON MONOXIDE to the indicated ANSI/ASTM standards: POISONING HAZARD Material Standard Schedule 40 PVC D1785 1. Seal any unused openings in the vent- PVC-DWV D2665 ing system SDR-21* D2241 2. Inspect the venting system for proper & SDR-26* size and horizontal pitch, as required ABS-DWV D2661 in the National Fuel Gas Code, ANSI Schedule 40 ABS F628 Z223.
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APPLICATION SINGLE PIPE LENGTH (ft.) DIRECT VENT, DUAL PIPE LENGTH (ft.) with 1 long radius elbow* with 1 long radius elbow on each pipe* PVC,CPVC or ABS Outlet Outlet Inlet/Outlet Inlet/Outlet Inlet/Outlet SCH. 40 Pipe Size 2” 3” 2” 2” 3” 2” 3” 3” Models 040 80 150 40 40 50 50 90 90 Models 060 & 080 60 150 30 30 35 35 90 90 Models 100 & 120 30 150 15 15 25 25 90 90 **NOTES 1. Subtract 2.5 ft. for each additional 2” long radius elbow, 5 ft. for each additional 2” short radius elbow, 3.5’
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equivalent vent length is less than the maximum Piping must be mechanically supported so that allowable vent length. Returning to our example, its weight does not bear on the furnace. Sup- we consult Table 5 and determine that for an ports must be at intervals no greater than fi ve 80,000 Btu/h furnace the maximum vent length feet, and at smaller intervals if necessary to for 2” diameter piping is 60 feet or for 3” diameter ensure that there are no sagging sections to piping is 150 feet. No
