®
NATURAL GAS RESIDENTIAL HEATERS
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life.
A.This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly.
B.BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electric switch; do not use any phone in your building.
•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas sup- plier, call the fire department.
C.Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service technician or gas supplier. Force or attempted repair may result in a fire or explosion.
D.Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been un- der water.
LIGHTING
INSTRUCTIONS
1.STOP! Read the safety information in column 1.
2.Make sure equipment shutoff valve is fully open.
3.Turn control knob clockwise 
to the OFF position.
4.Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety in- formation, column 1. If you don’t smell gas, go to the next step.
5.Turn control knob counterclockwise
to PILOT position. Press in control knob for five (5) seconds (see Figure 21).
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. This will allow air to bleed from the gas system.
6.With control knob pressed in, push down and release ignitor button. This will light pilot. The pilot is at- tached to the front of burner. If needed, keep pressing ignitor but- ton until pilot lights.
Note: If pilot does not stay lit, refer to Troubleshooting, pages 16 through 18. Also contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure, page 15.
Ignitor Button | Control Knob |
| |
| LO |
| PILOT |
| OFF |
| HI |
IGNITOR |
|
Figure 21 - Control Knob In The OFF Position
7.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.
•If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3 through 7. This heater has a safety interlock system. Wait one (1) minute before lighting pilot again.
8.Push knob in slightly and turn con- trol knob counterclockwise 
to desired heating level. The main burner should light. Set control knob to any heat level between HI and LO.
CAUTION: Do not try to adjust heating levels by using the equip- ment shutoff valve.
Thermocouple
Ignitor Electrode
Pilot Burner
Figure 22 - Pilot
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1.Turn control knob clockwise 
to the OFF position.
Note: Knob must be depressed slightly.
2.Turn off all electric power to the ap- pliance if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise 
to the PILOT position.
Note: Knob must be depressed slightly.
For more information, visit www.desatech.com | 14 | 107101 |
