Carrier 58MVC User Manual download pdf (Page 6)

A92185

Fig. 9 -- Turn Off Electrical Supply

A05099

Fig. 10 -- Remove Furnace Door

A04150

Fig. 11 -- Control Switch to OFF

A04151

Fig. 12 -- Control Switch to ON

A05100

Fig. 13 -- Furnace Door Replaced

A92359

Fig. 14 -- Turn On Electrical Supply

A06189

Fig. 15 -- Open Valve

7. Replace main furnace door. (See Fig. 13.)

8. Turn ON the electrical supply to the furnace and wait 1

minute. (See Fig. 14.)

9. Open the external manual gas valve. (See Fig. 15.)

10. Set the room thermostat to a temperature slightly above the

room temperature. This will automatically signal the furnace

to start.

11. When the furnace receives the start signal, the inducer is

started. When the pressure switch senses that there is suf--

ficient combustion air, the hot surface igniter is energized.

After the hot surface igniter is heated for 17 seconds, the gas

valve permits gas to flow to the main burners. After ignition

andatimedelayofabout30 sec,thefurnaceblower willstart.

Variable--capacity furnaces start at medium speed until the

control makes the necessary adjustments to operate the

blower at either the low--, medium--, or high--heat speed.

NOTE: If the burners fail to ignite after 4 attempts, the furnace

control system will lock out. If lockout occurs, main burners fail

to light, or blower does not come on, shut down the furnace and

call your dealer for service.

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Carrier 58MVC User Manual Page 6