OPERATING
HEATER
Continued
THERMOSTAT
CONTROL
OPERATION
The thermostat control knob can be set to any comfort level between HI and LO. The thermostat will gradually modulate the heat output and flame height from higher to lower settings, or pilot, in order to maintain the comfort level you select. The ideal comfort setting will vary by household depending upon the amount of space to be heated, the output of the central heating system, etc.
Note: Selecting the HI setting with the control knob will cause the burner to remain fully on, without modulating down in most cases.
MANUAL LIGHTING
PROCEDURE
1.Follow steps 1 through 5 under Light- ing Instructions, page 13.
2.Depress control knob and light pilot with match.
3.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow step 8, Lighting Instructions, page 13.
INSPECTING
BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 23 shows a correct pilot flame pat- tern. Figure 24 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touch- ing the thermocouple. This will cause the thermocouple to cool. When the thermo- couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 24
•turn heater off (see To Turn Off Gas to Appliance, page 13)
•see Troubleshooting, pages 16 through 18
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
Thermocouple
Figure 23 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 24 - Incorrect Pilot Flame Pattern
SPECIFICATIONS
Btu (Variable) | 16,000/30,000 |
Type Gas | Natural Gas Only |
Ignition | Piezo |
Pressure Manifold | 3.5" W.C. |
Inlet Gas Pressure (in. of water) | |
Maximum | 10.5" |
Minimum* | 5" |
Shipping Weight | 28 lbs. |
* For input adjustment |
|
SERVICE HINTS
When Gas Pressure Is Too Low
•pilot will not stay lit
•burners will have delayed ignition
•heater will not produce specified heat
You may feel your gas pressure is too low. If so, contact your local natural gas supplier.
TECHNICAL
SERVICE
You may have further questions about instal- lation, operation, or troubleshooting. If so, contact DESA International’s Technical Ser- vice Department at
You can also visit DESA International’s technical service web site at www.desatech.com.
14 | 104463 |
