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INSTALLATION MANUAL
HIGH EFFICIENCY EFFICIENCY
RATING
CERTIFIED
TUBULAR HEAT EXCHANGER SERIES
MODELS: GY9S*DH / GM9S*DH / GF9S*DH
(Single Stage Downflow/Horizontal)
ISO 9001
Certified Quality
40 - 120 MBH INPUT
Management System
(11.72 - 35.17 KW) INPUT
LIST OF SECTIONS
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
DUCTWORK . . . . . . . . . . . . . .
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268890-UIM-B-0607 SPECIFIC SAFETY RULES AND PRECAUTIONS • Provide clearances from combustible materials as listed under Clearances to Combustibles in Table 1. 1. Only Natural gas or Propane (LP) gas are approved for use with • Provide clearances for servicing ensuring that service access is this furnace. Refer to the furnace rating plate or Section IV of allowed for both the burners and blower. these instructions. • These models ARE NOT CSA listed or approved for installation 2. Install this fur
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268890-UIM-B-0607 INSPECTION As soon as a unit is received, it should be inspected for possible dam- age during transit. If damage is evident, the extent of the damage The furnace area must not be used as a broom closet or for any should be noted on the carrier’s freight bill. A separate request for other storage purposes, as a fire hazard may be created. Never inspection by the carrier’s agent should be made in writing. Also, before store items such as the following on, near or in contact with
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268890-UIM-B-0607 When the furnace is used in conjunction with a cooling coil, the coil must be installed parallel with, or in the supply air side of the furnace to avoid condensation in the primary heat exchanger. When a parallel flow arrangement is used, dampers or other means used to control airflow Downflow/Horizontal furnaces for installation on combustible floor- must be adequate to prevent chilled air from entering the furnace. If ing only when installed on the accessory combustible floor
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268890-UIM-B-0607 Use the Example below to help you in calculating the duct area to deter- 2. The square inch area for 7 inch round ducts, 38.4 square inch x 2 = 76.8 square inches, mine whether the ducts have sufficient area so that the furnace oper- ates at the specified external static pressure and within the air 3. Then take the 192 square inch from the rectangular duct and add it temperature rise specified on the nameplate. to the 76.8 square inch of round duct. The total square inch of duc
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268890-UIM-B-0607 Downflow Air Conditioning Coil Cabinet Horizontal Models The Cooling Coil Cabinet can be used in place of the combustible floor base for downflow installations on combustible materials. The furnace should be installed with the cooling coil cabinet specifically intended for downflow applications. The cooling coil cabinet must be secured to the floor. A supply air duct plenum is installed through the opening pro- vided. The supply air duct is then secured to the duct system with
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268890-UIM-B-0607 A T-STAT WIRING 7/8” K.O. T-STAT WIRING 7/8” K.O. HORIZONTAL CONDENSATE HORIZONTAL CONDENSATE DRAIN OPENING 1-3/4” DRAIN OPENING 1-3/4” HORIZONTAL CONDENSATE HORIZONTAL 40 DRAIN OPENING 2” CONDENSATE DRAIN OPENING 1-3/4” JUNCTION BOX HOLE 7/8” JUNCTION BOX HOLE 7/8” GAS PIPE ENTRY 1-1/2” GAS PIPE CONDENSATE DRAIN ENTRY 1-1/2” HOLE 7/8” SIDE PIPING HOLE 3-3/8” CONDENSATE DRAIN HOLE 7/8” 28-1/2 LEFT SIDE FRONT RIGHT SIDE 23-5/8 1-1/4 5/8 19-1/4 1-1/4 5/8 D B C 20 2-1/4 23-1/4 B
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268890-UIM-B-0607 Downflow Filters HORIZONTAL APPLICATION Downflow furnaces typically are installed with the filters located above Horizontal Filters the furnace, extending into the return air plenum or duct. Any branch All filters and mounting provision must be field supplied. Filters(s) may duct (rectangular or round duct) attached to the plenum must attach to be located in the duct system external to the furnace or in a return filter the vertical plenum above the filter height. grille(s). Fil
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268890-UIM-B-0607 EXTERNAL MANUAL SHUTOFF VALVE TO GAS TO GAS SUPPLY SUPPLY SUPPORT ANGLE IRON BRACKET BRACKET 1” MAX. BETWEEN ROD & FURNACE 6” MIN. BETWEEN GROUNDED JOINT UNION 1” MAX. BETWEEN ROD & FURNACE DRIP MAY BE INSTALLED ROD & FURNACE INSIDE OR OUTSIDE UNIT. LEG FIGURE 6: Typical Suspended Furnace / Crawl Space Installation FIGURE 8: Downflow Gas Piping MANUAL SHUT-OFF VALVE In any application where temperatures below freezing are possible, DRIP see “BELOW FREEZING LOCATIONS”. LEG G
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268890-UIM-B-0607 TABLE 6: Nominal Manifold Pressure Manifold Pressures (in wc) Manifold Pressures (kpa) Altitude (feet) Altitude (m) 0-7999 8000-8999 9000-9999 0-2437 2438-2742 2743-3048 800 3.5 3.5 3.5 29.8 0.87 0.87 0.87 850 3.5 3.5 3.5 31.7 0.87 0.87 0.87 900 3.5 3.5 3.5 33.5 0.87 0.87 0.87 950 3.5 3.5 3.3 35.4 0.87 0.87 0.81 1000 3.5 3.2 2.9 37.3 0.87 0.80 0.73 1050 3.5 2.9 2.7 39.1 0.87 0.73 0.67 1100 3.2 2.7 2.4 41.0 0.80 0.66 0.61 2500 (LP) 9.8 8.2 7.5 93.2 (LP) 2.44 2.03 1.86 PROPANE AN
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268890-UIM-B-0607 SUPPLY VOLTAGE CONNECTIONS IMPORTANT: The power connection leads and wiring box may be relo- BLOWER cated to the left side of the furnace. Remove the screws and cut wire tie COMBUSTION COMPARTMENT AIR holding excess wiring. Reposition on the left side of the furnace and fas- ten using holes provided. VENT PIPE 1. Provide a power supply separate from all other circuits. Install CLASS 2 SYSTEM overcurrent protection and disconnect switch per local/national CONTROL WIRING IGNITION
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268890-UIM-B-0607 FIGURE 11: Thermostat Chart 12 Unitary Products Group AC1 Single Stage A/C w/Single Stage Furnace, 1 Stage Cooling Ready - (G,L)*8/9S, XYF80-U, XYF80-U*L, XYF90-U THERMOSTAT THERMOSTAT THERMOSTAT PSC SINGLE STAGE FURNACE CONTROL AIR CONDITIONING *BN11C00124 *BP11C50124 *PP11C70224 *BN11C01124 *DP11C40124 *DN11C00124 Optional w/Batteries C C C C 24-Volt Common 24-Volt Common 24-Volt Common 24-Volt Common Y Y Y Y/Y2 Y First Stage Cool First Stage Cool First Stage Cool Single/Se
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COMMON SUPPLY PLENUM 268890-UIM-B-0607 ACCESSORY CONNECTIONS TWINNING DUCT SYSTEM The furnace control will allow power-switching control of various acces- Twinned furnaces must only be applied on a common duct system. A sories. Refer to Figure 12, for connection details. single air supply plenum must be used for both furnaces and coil(s). Separate plenums and supply ducts systems cannot be utilized. A sin- HUM. HOT gle return air plenum, common to both furnaces must be used. BLK 115 VOLT Both fu
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268890-UIM-B-0607 Single-Wire Twinning Instructions Single-Wire Staging Instructions Connect the control wiring as shown in the Figure 15. Connect the control wiring as shown in the Figure 14. 1. Connect the low voltage wiring from the wall thermostat to the ter- 1. Connect the low voltage wiring from the wall thermostat to the ter- minal strip on the control board of Furnace #1. For staging applica- minal strip on the control board of Furnace #1. tions, the wire from thermostat W1 is connecte
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268890-UIM-B-0607 TABLE 8: Maximum Equivalent Pipe Length Maximum Model Input Pipe Size Equivalent This furnace may not be common vented with any other appliance, BTUH (kW) Inches (cm) since it requires separate, properly sized air intake and vent lines. length feet (m) The furnace shall not be connected to any type of B, BW or L vent 40,000 (11.7) 2 (5.1) 65 (19.8) or vent connector, and not connected to any portion of a factory- built or masonry chimney 40,000 (11.7) 3 (7.6) 90 (27.4) The
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268890-UIM-B-0607 COMBUSTION AIR AND VENT PIPING ASSEMBLY A The final assembly procedure for the combustion air and vent piping is A as follows: 1. Cut piping to the proper length beginning at the furnace. 2. Deburr the piping inside and outside. 3. Chamfer (bevel) the outer edges of the piping. 4. Dry-fit the vent piping assembly from the furnace to the outside ter- mination checking for proper fit support and slope. 5. Dry-fit the combustion air piping assembly checking for proper fit, support
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V V 268890-UIM-B-0607 VENT CLEARANCES G A V VENT TERMINAL H D FIXED X AIR SUPPLY CLOSED E B B B I AREA WHERE TERMINAL IS NOT PERMITTED B M L C K J FIXED B F CLOSED B OPERABLE FIGURE 17: Home Layout 1,3 2,3 Direct Vent Terminal Clearances Canadian Installations US Installation A. Clearance above grade, veranda, porch, deck, or 12 inches (30 cm) 12 inches (30 cm) balcony Two-pipe (direct vent) applications: 9 inches (23 cm) 12 inches (30 cm) for models ≤100,000 BTUH (30 kW), B. Clearance to wi
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268890-UIM-B-0607 VENT SYSTEM HORIZONTAL VENT ASSEMBLY This furnace is certified to be installed with one of two possible vent Horizontal Left Vent Assembly configurations. 1. Place the 2” (5.08 cm) 45° PVC street elbow on the vent connec- 1. Horizontal vent system. This vent system can be installed com- tion shown in Figure 18. pletely horizontal or combinations of horizontal, vertical, or offset 2. Place the 2” (5.08 cm) PVC WYE (“Y”) assembly on the 2” (5.08 using elbows. cm) 45° PVC street e
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268890-UIM-B-0607 12” MINIMUM BELOW OVERHANG MIN. 12” MINIMUM 6” SEPARATION BETWEEN BOTTOM OF COMBUSTION AIR PIPE AND BOTTOM OF VENT MAINTAIN 12” MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW FIGURE 24: Double Vertical Sealed Combustion Air and Vent LEVEL OR GRADE, Termination WHICHEVER IS VENT DRAIN HIGHER COMBUSTION AIR SUPPLY FIGURE 22: Crawl Space Termination Configuration - 2Pipe All installations must comply with Section 5.3, Air for Combustion and VERTICAL VENT APPLICATIONS AN
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268890-UIM-B-0607 The combustion air intake pipe should be located either through the Combustion Air Source From Outdoors wall (horizontal or side vent) or through the roof (vertical vent). Care The blocking effects of louvers, grilles and screens must be given con- should be taken to locate side vented systems where trees or shrubs sideration in calculating free area. If the free area of a specific louver or will not block or restrict supply air from entering the terminal. grille is not known,
