6.Move the switch on the gas valve to the ON position.
7.Replace the gas section access panels.
8.Turn on the electrical supply to the units.
9.Open the
10.Using the scrolling marquee, enable the unit to run using the following procedure:
a.Push the ESCAPE key unit a blank display screen is shown.
b. Push the | key until the SERVICE TEST LED is |
lit. |
|
c. Push the ENTER key. The display will show STOP.
d.Push the ENTER key again. The NO/YES display will flash.
e.Push the 
or 
key to toggle the display to NO and then push ENTER . The unit will return to normal operation and exit Service Test mode.
11.To test the operation of the gas section, use the scrolling marquee Service Test routine to energize the gas outputs and to turn on the gas. Refer to unit Controls,
12.For normal operation, make sure that units with a conven- tional thermostat are set to heating control temperature. On VAV (variable air volume) and CV (constant volume) units with a space temperature sensor, make sure that the set points are at the normal heat set points.
WARNING
If the main burners fail to light or the blower fails to start, shut down gas heating section and call your dealer for ser- vice. Failure to follow these requirements could result in serious personal injury.
TO SHUT UNIT OFF
WARNING
1.Do not turn off the electrical power to unit without first turning off the gas supply.
2.Never attempt to manually light the main burners on unit with a match, lighter, or any other flame. If the electric sparking device fails to light the main burners, refer to the following shutdown procedures. Call your dealer as soon as possible.
Failure to follow these procedures can result in serious fire or personal injury.
Refer to Fig. 4 while performing the following steps:
1.Disable unit operation by using the scrolling marquee. The scrolling marquee is located in the control box at the compressor end of the unit.
a.Push the ESCAPE key unit a blank display screen is shown.
b.Push the 
key until the SERVICE TEST LED is lit.
c.Push the ENTER key. The display will show STOP.
NOTE: Items in the configuration and Service Test modes are password protected. The display will flash PASS and WORD when required. Use the
ENTER and arrow keys to enter the 4 digits of the password. The default password is 1111.
d.Push the ENTER key again. The NO/YES display will flash.
e.Push the 
or 
key to toggle the display to YES and then push ENTER . The unit will be locked off from heating, cooling or any operation. The controls will still function and the display will still operate.
2.Close the
3.Turn off the electrical power to the unit using the optional disconnect or the
4.Remove the gas section panels.
5.Move the switch on the gas valve to the OFF position and wait 5 minutes before doing any service in the section or on the piping.
6.Replace gas section access panels.
7.If unit is being shut down because of a malfunction, call your dealer as soon as possible.
If unit is being shut down because the heating season has ended, restore electrical power to the unit and reset the scrolling marquee to Run mode to ensure operation of the cooling system during the cooling season.
IMPORTANT: Should overheating occur or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply.
Do not use this unit if any part has been under water. Imme- diately call a qualified service technician to inspect the unit and to replace any part of the control system and gas control that has been under water.
MAINTAINING YOUR UNIT
All maintenance should be handled by skilled, experienced personnel. Your dealer can help you establish a standard procedure.
For your safety, keep the area around the unit clear and free of combustible materials, gasoline, and other flammable liquids and vapors.
To ensure proper functioning of the unit, the flow of com- bustion and ventilating air must not be obstructed from reach- ing the unit. Clearance of at least 4 ft on flue and condenser sides and 6 in. on all other sides is required.
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Consider the following information before maintaining or servicing equipment:
WARNING
1.TURN OFF GAS SUPPLY AND THEN ELECTRI- CAL POWER TO YOUR UNIT BEFORE SERVIC- ING OR PERFORMING MAINTENANCE.
2.Do not turn off electrical power to this unit without first turning off the gas supply.
3.When removing access panels or performing mainte- nance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care has been taken to reduce sharp edges inside the unit, be extremely careful when handling parts or reaching into the unit.
Failure to follow these procedures can result in serious fire or personal injury.
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