8 - CD2 1 D1 - 5 Installer’s Guide High Efficiency Single Stage Upflow/ Horizontal and Downflow/ Horizontal Gas-Fired Furnaces, “Fan Assisted Combustion System” *UD1A040A9H21B *UD1B060A9H31B *UD1B080A9H31B *UD1C080A9H41B *UD1B100A9H31B *UD1C100A9H51B *UD1D120A9H51B *UD1D140A9H51B *DD1B060A9H31B *DD1B080A9H31B *DD1C100A9H51B *DD1D120A9H51B *__First letter may be “A” or “T” ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT — This Document is customer property an
Installer’s Guide SAFETY SECTION ! WARNING ▲ The following safety practices and precautions must be followed during the installation, servicing, and operation of this furnace. 1. Use only with the type of gas approved for this furnace. Refer to the furnace rating plate. 2. Install this furnace only in a location and position as specified in “Location and Clearances” (page 4), of these instructions. 3.
Safety signal words are used to designate a degree or level of seriousness associated with a particular hazard. The signal words for safety markings are WARNING, and CAUTION. a. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. b. CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It is also used to alert against unsafe practices and hazards involving only property damage.
Installer’s Guide GENERAL INSTALLATION INSTRUCTIONS The manufacturer assumes no responsibility for equipment installed in violation of any code or regulation. It is recommended that Manual J of the Air Conditioning Contractors Association (ACCA) or A.R.I. 230 be followed in estimating heating requirements. When estimating heating requirements for installation at Altitudes above 2000 ft., remember the gas input must be reduced (See GAS INPUT ADJUSTMENT).
(ALL DIMENSIONS ARE IN INCHES) *UD1-H OUTLINE DRAWING From Dwg. 21C341699 Sh. 1 Rev.
(ALL DIMENSIONS ARE IN INCHES) *DD1-HF OUTLINE DRAWING From Dwg. 21C341700 Sh. 1 Rev.
Installer’s Guide UPFLOW INSTALLATION Standoffs and screws (See Figure 1 on page 6) are included with the cased coils for attachment to the furnace. There are clearance alignment holes near the bottom of the coil wrapper and drill screws are used to engage the furnace top flange. The standoff is inserted into the cabinet alignment hole. The drill screws are inserted through the standoffs then screwed into the furnace flange. The coil is always placed downstream of the furnace airflow.
Installer’s Guide If the furnace is suspended using perforated steel strap (plumber’s strap), it must be supported at all four corners and in the middle at the front of the furnace. The forward most screw on the side of the furnace may be used to connect the strapping (See Figure 6). Line contact is only permissible between lines formed by the intersection of the top and two sides of the furnace casing and the building joists, studs, or framing.
Installer’s Guide 1. All air from inside the building as in Figure 9: The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Refer to Table 3, for minimum open areas required. 2.
Installer’s Guide DUCT CONNECTIONS Air duct systems should be installed in accordance with standards for air conditioning systems, National Fire Protection Association Pamphlet No. 90. They should be sized in accordance with ACCA Manual D or whichever is applicable. Check on controls to make certain they are correct for the electrical supply.
Installer’s Guide REMOVE FILTER FROM UPFLOW FURNACE WHEN RETURN DUCT IS ATTACHED TO FURNACE TOP SIDE (HORIZONTAL LEFT OR RIGHT APPLICATIONS) AS SHOWN. q FILTER w * LOCATING NOTCHES PROVIDED FOR SIDE RETURN CUTOUT CUT OUT FOR SIDE FILTER * * * Close coupled (less than 36") return (filter directly beneath bottom side return) not recommended due to noise considerations. If used, securely attach 1/2" mesh metal hardware cloth protective screen to the inside bottom of filter grill.
Installer’s Guide TABLE 4 UPFLOW FURNACE RETURN AIR FILTERS CABINET WIDTH QTY* CABINET BOTTOM FILTER CABINET SIDE FILTER 14-1/2" 1 14" X 25" X 1" 17-1/2" X 25" X 1" 17-1/2" 1 17" X 25" X 1" 17-1/2" X 25" X 1" 21" 1 20" X 25" X 1" 17-1/2" X 25" X 1" 24-1/2" 1 24" X 25" X 1" 17-1/2" X 25" X 1" *First letter may be "A" or "T" **NOTE: For upflow 5 ton airflow models where the airflow requirement exceeds 1800 CFM - Modles will require return air openings and filters on: (1) both sides, or (2)
Installer’s Guide i Filter Rack Furnace Cabinet Side a REAR DE SI OUT T CU Filter Rack Retaining Screw/Pin ALTERNATE FILTER CLIPS LOCATION Engagement Hole For Filter Rack Installation With Bottom Return o Furnace Cabinet Side Filter Rack Retaining Screw/Pin s Filter Rack w Airflo Engagement Hole For Filter Rack Installation With Bottom Return Optional door kit BAYFLTR206 Bottom Panel p BLOWER DECK Engagement Hole For Filter Rack Installation With Side Return Furnace Blower Deck Furnace Cab
Installer’s Guide TABLE 5 CABINET WIDTH 14-1/2" 17-1/2" 21" 24-1/2" FILTER SIZE 2 - 14X20X1 2 - 16X20X1 2 - 16X20X1 2 - 16X20X1 GENERAL VENTING INSTRUCTIONS FILTER BRACKET LOCATION * 12-7/8" 14-3/8" 13-1/8" 11-5/8" * Location dimension is from end of duct to the screw holes for the bracket.
Installer’s Guide VENT PIPING These furnaces have been classified as Fan-Assisted Combustion System, Category I furnaces under the “latest edition” provisions of ANSI Z21.47 and CAN/ CGA 2.3 standards. Category I furnaces operate with a non-positive vent static pressure and with a flue loss of not less than 17 percent. NOTE: If desired, a side wall termination can be accomplished through the use of an “add-on” draft inducer. The inducer must be installed according to the inducer manufacturer’s instructions.
Installer’s Guide TABLE 8 ELECTRICAL CONNECTIONS GAS VENT TERMINATION ROOF PITCH MINIMUM HEIGHT FLAT TO 7/12 OVER 7/12 TO 8/12 OVER 8/12 TO 9/12 OVER 9/12 TO 10/12 OVER 10/12 TO 11/12 OVER 11/12 TO 12/12 OVER 12/12 TO 14/12 OVER 14/12 TO 16/12 OVER 16/12 TO 18/12 OVER 18/12 TO 20/12 OVER 20/12 TO 22/12 1.0 FEET * 1.5 FEET 2.0 FEET 2.5 FEET 3.25 FEET 4.0 FEET 5.0 FEET 6.0 FEET 7.0 FEET 7.5 FEET 8.
Installer’s Guide FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE 1 STAGE HEATING USING A 1 STAGE HEATING THERMOSTAT NO COOLING FURNACE SEE NOTE 7 TWIN B/C SEE NOTE 6 TO 115 V 1 PH., 60 HZ., POWER SUPPLY PER LOCAL CODES B/C HUM SEE NOTE 5 From Dwg. 21B341437 P01 EAC SEE NOTE 5 From Dwg. B341437 Rev.
Installer’s Guide TWINNING These furnaces may be twinned. Twinning requires that two furnaces with the same configuration, capacity, and airflow must be used. They shall have common returns with equal pressure drops or ducts with equivalent lengths and sizes. See Field Wiring Diagrams below for proper hookup. 1 STAGE HEAT ONLY THERMOSTAT (WITH FAN SWITCH) TWINNING CONNECTION DIAGRAM FOR TWINNING 1 STAGE FURNACES WITH SINGLE WIRE TWINNING FEATURE 1 STAGE HEATING ONLY THERMOSTAT FURNACE NO. 2 FURNACE NO.
Installer’s Guide ! WARNING ▲ FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death or property damage. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury, or loss of life.
Installer’s Guide As the induced draft blower comes up to speed, the pressure switch contacts will close and the ignitor warm up period will begin. The ignitor will heat for approx. 20 seconds, then the gas valve is energized to permit gas flow to the burners. The flame sensor confirms that ignition has been achieved within the 6 second ignition trial period. After the flame sensor confirms that ignition has been achieved, the delay fan ON period (fixed at 45 seconds) begins timing.
Installer’s Guide ! CAUTION ▲ Replace and/ or tighten all plugs removed or loosened when adjusting gas pressure. Leak check the fittings before placing the furnace into regular service. Failure to follow this warning could result in fire, explosion, or property damage. For LP gases, the final manifold pressure setting shall be 10.5" W.C. with an input of no more than the nameplate rating and no less than 93% of the nameplate rating, unless the unit is derated for altitude.
Installer’s Guide TABLE 12 TABLE 13 GAS FLOW IN CUBIC FEET PER HOUR 2 CUBIC FOOT DIAL SEC. FLOW SEC. FLOW SEC. FLOW SEC.
Installer’s Guide CONTROL AND SAFETY SWITCH ADJUSTMENT LIMIT SWITCH CHECK OUT The limit switch is a safety device designed to close the gas valve should the furnace become overheated. Since proper operation of this switch is important to the safety of the unit, it must be checked out on initial start up by the installer. To check for proper operation of the limit switches, set the thermostat to a temperature higher than the indicated temperature to bring on the gas valve.
Installer’s Guide 2. LOSS OF FLAME OR GAS SUPPLY FAILURE If loss of flame occurs during a heating cycle (when flame is not present at the sensor), the control module will retry the ignition sequence up to two times after the sensor cools. If ignition is not achieved, it will lockout the furnace. 3. POWER FAILURE If there is a power failure during a heating cycle, the system will restart the ignition sequence automatically when power is restored, if the thermostat still calls for heat. 4.
