OPERATING
HEATER
Continued
5.Turn control knob counterclockwise
C-clockwise
Press in control knob for five (5) sec- onds (see Figure 40).
Note: You may be running this heater for the first time after hook- ing up to gas supply. If so, the con- trol knob may need to be pressed in for 30 seconds or less. This will allow air to bleed from the gas system.
•If control knob does not pop out when released, contact a qualified service person or gas supplier for repairs.
6.With control knob pressed in, press and release ignitor button. This will light pilot. The pilot is attached to the front burner. If needed, keep press- ing ignitor button until pilot lights.
Note: If pilot does not stay lit, con- tact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Light- ing Procedure.
7.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.
Note: If pilot goes out, repeat steps 3 through 7. This heater has a safety interlock system. Wait one (1) minute for system to reset before lighting pilot again.
8.Turn control knob counterclockwise
C-clockwise
CAUTION: Do not try to adjust heating levels by using the equip- ment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise Clockwise
to the OFF position.
Shutting Off Burners Only (pilot stays lit)
1. Turn control knob clockwise Clockwise
to the PILOT position.
MANUAL LIGHTING
PROCEDURE
1.Follow steps 1 through 5 under Light- ing Instructions, pages 19 and 20.
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.
INSPECTING
BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 42 shows a correct pilot flame pattern. Figure 43 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 43
• turn heater off (see To Turn Off Gas to |
Appliance, page 19 |
models] or page 20 |
trolled models]) |
| HI |
| OFF |
| LO |
| Pilot |
Ignitor Button | Control Knob |
Figure 40 - Control Knob and Ignitor But- ton Location
Ignitor Electrode
Thermocouple
Pilot Burner
Figure 41 - Pilot
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 burners to remain fully on, without modulating down in most cases.
• seeTroubleshooting, pages 22 through 24 |
Thermocouple | Pilot Burner |
Figure 42 - Correct Pilot Flame Pattern
Thermocouple | Pilot Burner |
Figure 43 - Incorrect Pilot Flame Pattern
For more information, visit www.desatech.com | 20 | 107123 |
