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TWO STAGE CONDENSING GAS FURNACE
INSTALLATION AND OPERATION MANUAL
MODELS:
FOR USE WITH NATURAL GAS OR LP GAS (PROPANE)
CHX3-75N CDX3-75N
CHX3-100N CDX3-100N
CHX3-125N CDX3-125N
: IF YOU DO NOT FOLLOW THE SAFETY PRECAUTIONS BELOW AND IN THIS
MANUAL, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY, OR LOSS OF LIFE.
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE
VICINITY OF THIS OR ANY OTHER APPLIANCE.
WHAT TO DO
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All installations and services must be performed by qualified service personnel. I. SAFETY INFORMATION This and the following page contain reproductions of the various warning and instruction labels placed on the Thermo Pride Two Stage Condensing Gas Furnaces. Please read and comply with the contents of these labels. i
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All installations and services must be performed by qualified service personnel. This and the previous page contain reproductions of the various warning and instruction labels placed on the Thermo Pride Two Stage Condensing Gas Furnaces. Please read and comply with the contents of these labels. The following safety information should be read, understood, and followed by the installer. WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing prope
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All installations and services must be performed by qualified service personnel. 1. Use only with type of gas approved for this furnace. Refer to furnace rating plate. 2. Connect this furnace to an approved vent system only. Combustion products must be carried outdoors. Refer to Section III, D thru H, of this manual. The following pages contain various warnings and cautions found throughout the Thermo Pride Highboy and Dual Poise Two Stage Condensing Gas Furnace Manual. Please read
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All installations and services must be performed by qualified service personnel. : The CHX3/CDX3 furnace models are sealed combustion design, which does not require an air shutter adjustment (air shutters are not used) for proper flame characteristics. Burner box access cover must always be secured with all screws in place and tightened before operating furnace. : Personal injury or property damage could result from repair or service of this furnace by anyone other than a qualified heati
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All installations and services must be performed by qualified service personnel. INDEX SECTION BEGINNING PAGE I. SAFETY INFORMATION i II. FURNACE SPECIFICATIONS 1 III. GENERAL INSTALLATION 6 A. CODES AND CLEARANCES 6 B. FURNACE LOCATION 7 B1.CDX3 HORIZONTAL APPLICATION 7 C. REPLACING EXISTING FURNACE FROM A COMMON VENT 9 D. GENERAL REQUIREMENTS FOR VENTING CHX3/CDX3 9 E. SIDEWALL VENTING 11 E1. SINGLE PIPE (SIDEWALL)
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All installations and services must be performed by qualified service personnel. II. FURNACE SPECIFICATIONS CHX3 SERIES MODEL NO. CHX3-75 CHX3-100 CHX3-125 BTU/HR INPUT (High fire/ Low fire) 75,000 / 52,000 100,000 / 125,000 / 70,000 87,500 BTU/HR OUTPUT (High fire/ Low fire) 71,000 / 49,000 95,000 / 66,000 115,000 / 82,000 44-1/4” 44-1/4” 44-1/4” HEIGHT OF CASING 17” 21” 24” WIDTH OF CASING DEPTH OF CASING 27-1/2” 27-1/2” 27-1/2” WARM AIR OUTLET 15 x 18 19 x 18 22 x 18 R
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All installations and services must be performed by qualified service personnel. CDX3 SERIES MODEL NO. CDX3-75 CDX3-100 CDX3-125 BTU/HR INPUT (High fire / Low fire) 75,000 / 56,250 100,000 / 125,000 / 75,000 93,750 71,000 / 52,000 94,000 / 69,000 116,000 / BTU/HR OUTPUT (High fire / Low fire) 87,000 HEIGHT OF CASING 46-1/4” 46-1/4” 46-1/4” WIDTH OF CASING 17” 21” 24” 27-1/2” 27-1/2” 27-1/2” DEPTH OF CASING WARM AIR OUTLET 15 x 18 19 x 18 22 x 18 RETURN AIR INLET 15 x 22 19 x
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All installations and services must be performed by qualified service personnel. INSTALLATION PARTS PACKAGES – CHX3-75 PARTS PACKAGE DESCRIPTION PART # QUANTITY #S00S4413 2-3/8” ID radiator hose 410017 1 Thermostat lead bushing 350750 1 PVC trap assembly 320816 1 #8 x ¾ coated TEK screws for 300283 4 mounting trap & inlet/outlet collars 11/16” OD x 1/2” ID vinyl tubing 410060 24” 2 x 4 electrical J-box 350024 1 2 x 4 electrical J-box cover 350020 1 #8 x ½ TEK screws for
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All installations and services must be performed by qualified service personnel. PVC tee assembly, 2 x 3” dia. 320817 1 CPVC XPVC adapter 320833 1 Gas Conversion Kit AOPS7683/7419 1 INSTALLATION PARTS PACKAGES – CDX3-75 PARTS PACKAGE DESCRIPTION PART # QUANTITY #S00S4416 2-3/8” ID radiator hose 410017 1 Thermostat lead bushing 350750 1 PVC trap assembly 320816 1 #8 x ¾ coated TEK screws for 300283 6 mounting trap & inlet/outlet collars 11/16” OD x ½” ID vinyl tubing
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All installations and services must be performed by qualified service personnel. Grounding instructions MG-966 1 Wire nut 300132 2 3” stainless steel hose clamp 300276 2 J-box wire bushing 350016 1 Drain hose grommet 350446 1 Spring clamp, 11/16” 300299 3 Installation notice MG-987 1 PVC tee assembly, 2 x 3” dia. 320817 1 PVC tee assembly, 2” dia. 320819 1 Pipe 2” dia. PVC 15” 14401 1 Bracket 14406 1 Reducer 2” x 3” PVC 320067 1 CPVC XPVC adapter 320833 1 Gas Conve
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All installations and services must be performed by qualified service personnel. III. GENERAL INSTALLATION These Category Type IV furnaces are shipped completely assembled and wired (internally). See the Dealer Receiving and Freight Claim Procedure Section of the price guide for parts shortage or damage. The furnace and duct system must be adjusted to obtain a temperature rise of 55°F to 85°F through the furnace after installation. (See rating label located on side panel inside the furnac
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All installations and services must be performed by qualified service personnel. These furnaces may be installed in an alcove or in a closet if the minimum clearances to combustible construction (listed previously) are met. The CDX3 series furnaces may be installed in an attic or crawl space. Refer to section III, B1 of this installation manual. The minimum clearances are listed for fire protection. Clearance for servicing the front of the furnaces and to all points on the furnace requiri
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All installations and services must be performed by qualified service personnel. NOTE: The hose, when moved, must be shortened (cut) to ensure that no excess hose exists to cause a sag, loop, or "water trap". For a right side horizontal application of the CDX3 series units, the auxiliary limit switch located on the right side of the house air blower must be moved to the bracket on the opposite (left) side of the blower (See Figure 1). NOTE: When the CDX3 is installed as horizontal unit,
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All installations and services must be performed by qualified service personnel. The horizontal furnace installation should be on a service platform large enough to allow for proper clearances on all sides and service access to the front of the furnace (See Table 1). If the furnace is suspended, it must be supported at both ends and in the middle with clearance allowed for removal of both access doors. Gas supply line contact is only permissible between lines formed by the intersection of
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All installations and services must be performed by qualified service personnel. 5. All horizontal runs of exhaust vent pipe shall slope upward at least ¼ inch per foot from the outlet of the furnace (for model CHX3), or the outlet of the drain tee (for the model CDX3), to the vent termination, beyond the outside wall. This slope will permit proper drainage of the condensate. Horizontal runs of air intake pipe shall slope downward at least ¼ inch per foot from the outlet of the last elbow
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All installations and services must be performed by qualified service personnel. all pipe joints using suitable permanent PVC pipe solvent cement. Joints are NOT to be made by simply gluing raw edges of butted together vent pipe. The piping joints inside the furnace vestibule should be sealed with a silicone caulk, rather than pipe cement, to allow for disassembly and removal of piping, if necessary, during maintenance. NOTICE: DO NOT use silicone caulk to seal the pipe sleeve or coupli
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All installations and services must be performed by qualified service personnel. NOTICE: If exterior sidewall building materials are subject to degradation from contact with flue gases or moisture, a minimum 24-inch diameter shield shall be fabricated from stainless steel or UV-resistant plastic sheet. The protective shield shall be installed around the vent pipe on the outside wall. 2. The exhaust vent termination elbow shall be installed in accordance with these instructions and any ap
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All installations and services must be performed by qualified service personnel. • near soffit vents, crawl space vents, or other areas where condensate or water vapor could create a nuisance, hazard, or cause property damage, and • where wetting of components by condensate, or water vapor, could be detrimental to the operation of pressure regulators, relief valves, or any other equipment. d. The vent terminal shall be installed a minimum of 14-inches from any obstruction and 3-feet from
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All installations and services must be performed by qualified service personnel. Figure 4: NFGC Minimum Clearances Between the Vent Terminal and Various Building Features Vent Terminal Location Guidelines 14
