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Do not force. See figure 5. 7 - Wait five minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you do not smell gas go to next step. 8 - White Rodgers 36E/36F Gas Valve - Switch gas valve le- ver to ON. See figure 3 for the White Rodgers 36E valve and figure 4 forthe White Rodgers 36F valve. Honeywell VR8205 Gas Valve - Turn knob on gas valve counterclockwise to ON. Do not force. White Rodgers 36E Series Gas Valve MANIFOLD PRESSURE ADJUSTMENT x SCREW MANIFOLD PRESSURE yS OUTLET GAS VALVE SHOWN IN OFF POSITION FIGURE 3 White Rodgers 36F Series Gas Valve FIGURE 4 Honeywell VR8205 Series Gas Valve MANIFOLD MANIFOLD GAS VALVE SHOWN IN OFF POSITION FIGURE 5 9 - Replace the upper access panel. 10 - Turn on all electrical power to to the unit. 11 - Set the thermostat to desired setting. NOTE - When unit is initially started, steps 1 through 11 may need to be repeated to purge airfrom gas line. 12- If the appliance will not operate, follow the section “Turning Off Gas to the Unit” and call your service technician or gas supplier. Turning Off Gas to the Unit 1 - Set the thermostat to the lowest setting. 2 - Turn off all electrical power to the unit if service is to be performed. 3 - Remove the upper access panel. Page 4 4 - White Rodgers 36E/36F Gas Valve - Switch gas valve lever to OFF. Honeywell VR8205 Gas Valve - Turn knob on gas valve clockwise & to OFF. Do not force. 5- Replacetheupperaccesspanel. Filters All G50UHi filters are installed external to the unit. Filters should be inspected monthly. Clean or replace the filters when necessary to ensure proper furnace operation. Replacement filters must be rated for high velocity airflow. Table 1 lists recommended filter sizes. A filter must be in place whenever the unit is operating. TABLE 1 Furnace Cabinet Size Filter Size Side Return Bottom Return 17-1/2” 16X25X1 (1) 16X25X1 (1) 21” 16X25X1 (1) 20X25X1 (1) 24-1/2” 16X25X1 (2) 24X25X1 (1) Maintenance A qualified service technician should inspect the complete system each season (heating and cooling). The following maintenance procedures should only be conducted by a qualified service technician. Do not attempt to service the unit in any way. Venting System Annually (before heating season) inspect furnace venting system, vent cap, heat exchanger, and burners for corrosion, deterioration, or deposits of debris. Remove any obstructions. Inspect the furnace for obvious signs of deterioration. Inspect the furnace venting system to make sure it is in place, physically sound, and without holes, corrosion, or blockage. Vent pipe must be clear and free of obstructions and must slope upward away from the furnace. Inspect the furnace return air duct connection to ensure duct is sealed to the furnace and terminates outside the space containing the furnace. Inspect the physical support of the furnace to guarantee that it is sound without sagging, cracks or gaps around base and it maintains seal between base and support. Inspect and clean the condensate trap and drain. During a seasonal check the service technician will inspect the indoor blower, burner flames and electrical connections along with the venting system. Blower Check the blower wheel for debris and clean if necessary. The blower motors are prelubricated for extended bearing life. No further lubrication is needed. AWARNING The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death. Burner Flame A CAUTION To ensure proper operation, a qualified technician should annually check the burner flame. Electrical 1 - Check all wiring for loose connections. 2 - Check for the correct voltage at the furnace (furnace operating). 3 - Check amp-draw on the blower motor. Motor Nameplate_Actual_ A WARNING Asphyxiation Hazard The exhaust vent for this furnace must be securely connected to the furnace flue collar at all times. For your safety and to fulfill the terms of the limited warranty, a qualified service technician must annually inspect this furnace and its vent system. AWARNING ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD. Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage. Improper servicing could result in dangerous operation, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace. When servicing controls, label all wires priorto disconnecting. Take care to reconnect wires correctly. Verify proper operation after servicing. Page 5 Service Reminder Call your Lennox service technician if the unit will not operate. Before calling, always check the following to be sure service is required: 1 - Check that electrical disconnect switche...