Desa VSL18NT - Manual (Page 15)

www.desatech.com 116292-01D 15
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information, page 14.
2. Make sure equipment shutoff valve is fully
open.
3. Turn off any electric power to the appliance
if service is to be performed.
4. Turn control knob clockwise to the
OFF position.
5. Wait five minutes to clear out any gas. Then
smell for gas, including near the floor. If you
smell gas, STOP! Follow “B” in the safety
information, page 14. If you donʼt smell gas,
go to the next step.
6. Turn control knob counterclockwise
to the PILOT position. Press in control
knob for five (5) seconds.
7. With control knob pressed in, push down and
release ignitor button. This will light pilot.
The pilot is attached to the front of burner.
Note: You may be running this heater for the
first time after hooking up to gas supply. If so,
you may need to press in control knob for 30
seconds or more. This will allow air to bleed
from the gas system. If needed, keep pressing
ignitor button until pilot lights. If ignitor does
not light pilot, refer to Troubleshooting, page
18 or 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 16.
8. 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 re-
leased, contact a qualified service person
or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4 thru 7.
Thermostat models have a safety interlock
system. Wait one (1) minute before lighting
pilot again.
9. Turn control knob counterclockwise
to desired heating level. The main burner
should light.
WARNING: Always operate
manual control heaters at the
locked positions. Operation
between these positions may
create a possible health hazard
if used in a poorly ventilated
room. Read owner’s manual for
complete instructions.
OF F P ILO
T
Figure 21 - Control Knob In The OFF
Position
Piezo Ignitor
Figure 23 - Pilot (actual pilot may vary)
OPERATING HEATER
Continued
Ignitor Electrode
Pilot Burner
Thermocouple
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise to the
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise to the
PILOT position.
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these models
differs from standard thermostats. Standard
thermostats simply turn on and off the burner.
The thermostat used on this heater senses the
room temperature. The thermostat adjusts the
amount of gas flow to the burner. This increases
or decreases the burner flame height. At times
the room may exceed the set temperature. If so,
the burner will shut off. The burner will cycle
back on when room temperature drops below the
set temperature. The control knob can be set to
any heat level between 1 and 5. Selecting the 5
setting will cause the burner to remain fully on
without modulating down in most cases.
OFF OF F
PIL
OT
Electronic Ignitor
Figure 22 - Ignitor Buttons
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.