Operating instructions

33D4051 31
THERMOSTATIC CONTROL LIGHTING INSTRUCTIONS
1. STOP! Read the safety information .
2. Make sure the manual shutoff valve is fully open.
3. Thisheaterisequippedwithanignitiondevice(piezo)whichautomaticallylightsthepilot.
4. See Figure 44, page 29 forthelocationofthepiezoignitorandcontrolknob.Turncontrolknobclockwise
to the OFF position.
5. Wait5minutestoclearoutanygas.Thensmellforgas,includingneartheoor.Ifyousmellgas,STOP!
Follow safety instructions under What To do if You Smell Gas, page 29.Ifyoudonotsmellgas,gotothe
nextstep.
6. Turnthegascontrolknobcounterclockwise to the IGN position. See Figure 40. Push in and hold
control knob for 5 seconds.
7. Withthecontrolknobpushedinandheld,pushandreleasethepiezoignitorbuttontolighttheODSpilot.
Thepilotislocatedontherightsideoftheheater,behindthefrontlogandinfrontoftheburner.Ifpiezo
ignitordoesnotlightthepilot,seeMatch Lighting Instructions, page 32.
8. Holdthecontrolknobinforanadditional10secondstopreventtheODSpilotfromshuttingoffthegas
whilethethermocoupleiswarmingup.
9. Release the control knob.
 • Iftheknobdoesnotpopoutwhenreleased,stopandimmediatelycallyourservicetechnicianorgas
supplier.
• If the ODS pilot will not stay lit after several tries, push and turn the control knob clockwise
toOFF.Releaseandwait15seconds.Repeatsteps6through9.
10. TurncontrolknobtoanypositionbetweenLOWandHIGH.Theknobpositioncontrolsthethermostattem-
perature. See Figure 48.
11. Theheaterisnowinproperoperation.Thefollowingprocedureshouldbeusedtoachievethermostaticcontrol
of the desired room temperature.
a. Operateunitathighersettinguntildesiredroomtemperatureis
achieved.
b. At the desired temperature, slowly turn the knob clockwise and
stoprotatingwhenamedisappears.
c. Thermostat is now set to maintain the current room tempera-
ture.
d. As the room temperature decreases, the thermostat valve will
opentoignitethefrontandrearburner.
e. Whenthetemperaturereachesitssetpoint(knobposition),the
thermostatvalvewillagainshutofftheburner.
f. This is the normal cycle of the heater.
Figure 48 - Rotation of Control Knob
Rotate
OPERATING INSTRUCTIONS
WARNING
Wait 30 seconds before readjusting the
heater when the control knob has been
turned down to a lower setting.
TO TURN OFF GAS TO HEATER
1. Turn control knob clockwise to OFF position to completely shut off the heater.
2. If applicable: Turn off all electric power to the heater.