Unit Start−Up
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
Do not use this furnace if any part has been underwa- ter. Immediately call a licensed professional service technician (or equivalent) to inspect the furnace and to replace any part of the control system and any gas control which has been under water.
WARNING
If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.
CAUTION
Before attempting to perform any service or mainte- nance, turn the electrical power to unit OFF at dis- connect switch.
WARNING
During blower operation, the ECM motor emits ener- gy that may interfere with pacemaker operation. In- terference is reduced by both the sheet metal cabinet and distance.
BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
The gas valve on the SL280UHV unit will be equipped with a gas control switch. Use only your hand to move the switch. Never use tools. If the switch will not turn or if the control switch will not move by hand, do not try to repair it. Placing the furnace into operation:
SL280UHV units are equipped with an automatic ignition system. Do not attempt to manually light burners on these furnaces. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does not get hot when there is no call for heat on units with an automatic ignition system.
WARNING
If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or death.
Gas Valve Operation (Figures 35 and 36)
1 − STOP! Read the safety information at the beginning of this section.
2 − Set the thermostat to the lowest setting.
3 − Turn off all electrical power to the unit.
4 − This furnace is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand.
5 − Remove the upper access panel.
6 − Move gas valve switch to OFF position. Do not force. See figure 35 or 36.
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 instruc- tions. If you do not smell gas go to next step.
WHITE RODGERS GAS VALVE | ||
| MANIFOLD | HIGH FIRE ADJUSTMENT |
INLET PRESSURE POST | SCREW | |
| PRESSURE TAP | (under cap) |
GAS VALVE SHOWN IN ON POSITION | ||
FIGURE 35
| HONEYWELL GAS VALVE |
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| HIGH FIRE |
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INLET PRESSURE TAP | ADJUSTING SCREW |
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(under cap) |
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ON SIDE |
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| MANIFOLD |
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| PRESSURE |
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| TAP ON |
GAS VALVE SHOWN IN ON POSITION | SIDE | ||
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FIGURE 36
8− Move gas valve switch to ON position. Do not force. See figure 35 or 36.
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 air from gas line.
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