Desa LDL3924NR Inspecting Burners, Pilot Flame Pattern, Burner Primary AIR Holes, Main Burner

OPERATING HEATER

Continued

Setting Flame Height

Press the up or down key until the small triangle is to the left of large flame icon at the top of LCD display (see Figure 29, page 16). Press the left or right key to set the desired flame height. Six flame levels are available from 1 (minimum) to 6 (maximum).

Setting Room Temperature

Press the up or down key until the small triangle is to the left of the thermometer icon (see Figure 29, page 16). Press the left or right key to set the desired room temperature.

Setting Timer (Sleep Function)

Press the up or down key until the small triangle is to the left of the clock icon (see Figure 29, page 16). Press the left or right key to set the desired sleep time. Maximum sleep time is 90 minutes, in 15 minute increments. When desired time is set, press the up or down key to start the timer. When the desired time has elapsed, the appliance will automatically switch off.

Child Safety Lock-Out

To lock the remote control keys, press the On/Off key then immediately press the up key (see Figure 29, page 16). The lock- out function is active when the lock icon is lit. Repeat key sequence to unlock keys.

Low Battery Detection and Backup

A battery icon will be displayed on the LCD display when batteries are low in the remote control (see Figure 29, page 16).

When the receiver detects a low battery condition;

•Three acoustic "beeps" are generated from the receiver

•Appliance is turned off and will go to the maximum flame height

•Execution of commands is inhibited until batteries are replaced

When batteries are low, it is not possible to turn on the appliance with the remote control. Appliance can be turned on or off manually by setting the backup switch of the receiver to MAN position (see Figure 13, page 11). Remote control and receiver will restart normal operation after batteries are replaced. See Installing Batteries for Remote Receiver and Hand Held Remote Control, page 11.

Timeout

If appliance is turned on and no command is sent to the receiver for 24 hours, appliance will automatically shut down. Com- mands sent after shutdown will be executed normally.

OPERATING HEATER	17
Hand-Held Remote Operation (Cont.)
INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 30 shows a correct pilot flame pattern. Figure 31 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 31

•turn heater off (see To Turn Off Gas to Appliance, page 16)

•see Troubleshooting, pages 19 through 21

Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.

Pilot Burner Pilot Burner

Thermocouple	Thermocouple
Figure 30 - Correct Pilot Flame	Figure 31 - Incorrect Pilot
Pattern (Your pilot may vary	Flame Pattern (Your pilot may
from pilots shown)	vary from pilots shown)

BURNER PRIMARY AIR HOLES

Air is drawn into the burner through the holes in the fitting at the burner entrance. These holes may become blocked with dust or lint. Periodically inspect these holes for any blockage and clean if needed. Blocked air holes will create soot.

MAIN BURNER

Periodically inspect all burner flame holes with the heater running. All slotted burner flame holes should be open with yellow flame present. All round burner flame holes should be open with a small blue flame present. Some burner flame holes may become blocked by debris or rust, with no flame present. If so, turn off heater and let cool. Remove blockage, blocked burner flame holes will create soot.

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