110399-01B
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 39 shows a correct pilot flame pattern. Figure 40 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 40
• turn heater off (see To Turn Off Gas to Appliance, page 19 [Ther-
mostat-Controlled Models], page 20 [Manually-Controlled
Models], or page 22 [Remote-Ready Models])
• see Troubleshooting, pages 25 through 27
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.
OPERATING HEATER
Continued
Figure 37 - Setting the Selector switch, Control Knob, and Flame
Adjustment Knob for Remote Operation
IMPORTANT:
This remote control has been specially engi-
neered to take an air temperature sample every 5.5 minutes
in the auto mode. It will not respond immediately to the tem-
perature setting being turned up or down.
IMPORTANT:
The hand-held remote control unit must be
near the heater. Do not keep the hand-held remote control
unit too close to the heater. The thermostat on the hand-
held remote control unit will heat up too quickly and turn
the heater off.
3.
To turn the burner off, press the AUTO/ON/OFF button un-
til OFF lights. The pilot will remain lit.
IMPORTANT:
To turn the pilot off, manually turn the con-
trol knob on the heater to the OFF position.
Figure 38 - Thermostat Hand-Held Remote Control Unit
Selections (GHRCTA Only)
Increases Room
Temperature in
AUTO Mode
Decreases Room
Temperature in
AUTO Mode
Turns Burners
On or Off and
Allows You to
Choose the Auto
Setting
Shows
Temperature
Setting
The Log Heater
will Automatically
Cycle between
Pilot and the Heat
Setting that has
been Selected
OPERATING HEATER (REMOTE-READY MODELS)
Optional Remote Operation (Cont.)
INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner
ON
OFF
REMOTE
O
FF
PILO
T
O
N
L O
I H
Selector Switch in Remote Position
(Optional Remote Control)
Control Knob in
On Position
Flame Adjustment Knob
Figure 39 - Correct Pilot Flame
Pattern (Your pilot may vary
from pilots shown)
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
Figure 40 - Incorrect Pilot
Flame Pattern (Your pilot may
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.
