Assessments - 2, GPA: 4.5
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26-38. A CAUTION Personal injury can result form sharp metal edges, etc. Be careful when removing parts. Gloves and safety glasses should be worn when servicing equipment. 3. Orient the door to determine the correct location of the door cutout to be removed. 4. Use aviation-type tin snips to remove the correct U-shaped cut-out on door. An accessory Vent Guard Kit, KGAVG0101DFG is REQUIRED for downflow applications for use where the vent exits through the lower portion of the furnace casing door. Refer to the Vent Guard Kit Instructions for complete details. The horizontal portion of the venting system shall maintain a minimum of 1/4-in. upward slope per linear ft and it shall be rigidly supported every 5 ft or less with metal hangers or straps to ensure there is no movement after installation. SIDEWALL VENTING This furnace is not approved for direct sidewall horizontal venting without the use of an add-on power venter. In the U.S.: Per the NFGC, any listed power venter may be used, when approved by the authority having jurisdiction. In Canada: Only power venters approved by the appliance manufacturer and where allowed by the authority having jurisdiction may be used for sidewall venting. The only approved power venter is the Field Controls SWG-4D and SWG-5D sidewall power venter. Select the power venter to match the btuh input of the appliance being vented. Follow all manufacturer’s installation requirements for venting and termination included with the power venter. START-UP, ADJUSTMENT, AND SAFETY CHECK Step 1—General A WARNING This furnace is equipped with manual reset limit switches in the gas control area. The switches open and shut off power to the gas valve if a flame rollout or overheating condition occurs in the gas control area. DO NOT bypass the switches. Correct inadequate combustion air supply problem and reset the switches. Failure to follow this warning can cause fire, explosion, personal injury, or death. 21 CHIMNEY INSPECTION CHART For additional requirements refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1 and ANSI/NFPA 211 Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances in the U.S.A. or to the Canadian installation Codes CSA-B149.1 in Canada. f Chimney is ^ acceptable for use Fig. 25—Chimney Inspection Chart A02101 22 A CAUTION Personal injury can result form sharp metal edges, etc. Be careful when removing parts. Gloves and safety glasses should be worn when servicing equipment. 6. Verify furnace restarts by raising thermostat setting above room temperature. 1. Maintain 115-v wiring and ground. Improper polarity will result in rapid flashing LED and no furnace operation. 2. Make thermostat wire connections at the 24-v terminal block on the furance control. Failure to make proper connections will result in improper operation. (See Fig. 24.) 3. Gas supply pressure to the furnace must be greater than 4.5-in. wc (0.16 psig) but not exceed 14-in. wc (0.5 psig). 4. Check all manual-reset switches for continuity. 5. Install blower compartment door. Door must be in place to operate furnace. 6. Replace outer door. Step 2—Start-Up Procedures A WARNING Never purge a gas line into a combustion chamber. Never use matches, candles, flame, or other sources of ignition for the purpose of checking leakage. Use a soap-and-water solution to check for leakage. Failure to follow this warning can cause fire, explosion, personal injury, or death. 1. Purge gas lines after all connections have been made. 2. Check gas lines for leaks. A WARNING Blower access door switch opens 115-v power to control. No component operation can occur unless switch is closed. Caution must be taken when manually closing this switch for service purposes. Failure to follow this warning could result in electrical shock, personal injury, or death. 3. To Begin Component Self-Test: Disconnect the thermostat R lead from furnace control board. Manually close the blower door switch. Briefly short the TEST/TWIN terminal to the COM 24V terminal until LED goes out. Remove jumper from terminals. (See Fig. 23.) NOTE: The furnace control allows all components, except the gas valve, to be run for short period of time. This feature helps diagnose a system problem in case of a component failure. Component test feature will not operate if any thermostat signal is present at the control. Component test sequence is as follows: Refer to service label attached to furnace or see Fig. 43. a. LED will display previous status code 4 times. b. Inducer motor starts and continues to run until Step f of component test sequence. c. Hot surface ignitor is energized for 15 sec., then off. d. Blower motor operates on HEAT speed for 10 sec. e. Blower motor operates on COOL speed for 10 sec. f. Inducer motor stops. g. Reconnect R lead to furnace control board, release blower door switch and re-install blower door. 4. Operate furnace per instruction on door. 5. Verify furnace shut down by lowering t...
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