Desa VF-24N-MHD - Manual (Page 17)

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oPeRaTING HeaTeR
Continued
• Timer: The timer mode (TIMER) operates
much like the temperature mode above. The
timer setting allows you to set specific times
for on and off. (There are 2 burner on and
2 burner off cycles every 24 hours.) If the
reading for the nighttime temp. is "– – –",
the motor will turn off the valve to standby
pilot position and wait for the next burner
on cycle. This display shows the setting tem-
perature every 30 seconds.
Setting the Temperature
• Select the desired mode of operation (day or
night) by pressing the SET button briefly.
• Hold the SET button until the display
flashes.
• Set the temperature with the or (40°F
is the minimum temperature).
• Wait or press OFF to go to temperature
control mode.
• If temperature control in moon times should
be off (lower battery consumption), decrease
the night temperature until "– – –" appears
on display.
Set Timer
• Switch to timer mode by pressing the SET
button briefly.
• Press the SET button until P1 flashes.
• Set the hours with and minutes with .
• Press SET briefly for the next burner cycle
time.
• If all 4 times are set, pressing the OFF button
or waiting will complete the programming.
Shutting Off Heater
Press OFF button on remote control to switch
off main gas and pilot gas.
Shutting Off Burner Only (pilot stays lit)
Press to decrease the flame height and shut
off main burner.
MANUAL LIGHTING
PROCEDURE
WARNING: Manual lighting
must be performed by a qualified
service person.
The system has a "MANUAL OVERRIDE"
feature that allows you to light with a match.
Lighting with a Match
1. STOP! Read the safety information on
page 15 .
2. Make sure equipment shutoff valve is
fully open.
3. Turn motor-knob clockwise to to
OFF position.
4. Wait (5) minutes to clear any gas and then
smell for gas around heater and near floor. If
you smell gas, STOP! follow "B" on page 15.
If you do not smell gas, go to the next step.
5. Make sure ON/OFF switch is in "–" (ON)
position.
6. MAN-knob (valve) in MAN position, a
metallic core is visible. (see Figure 18).
7. Push and hold down metal core fully by us-
ing a non-sharp object such as a pen. This
lets the pilot gas flow.
8. Light pilot burner with a match, (see
Figure 19).
9. Continue holding down metal core for about
10 seconds. Pilot should stay lit after releas-
ing metal core. If not, repeat step 1 thru 4.
10. Turn MAN-knob to ON position. This lets
main gas flow.
11. Turn Motor-knob to adjust flame. Knob has
a slipping clutch that allows manual flame
height adjustment as well as adjustment to
pilot gas.
Figure 18 - Control Valve
Piezo
Ignitor
Tab
Metallic
Core for
Manual
Ignition
Piezo Ignitor
ON/OFF Switch
Microswitch
MAN-Knob
in Manual
Position
Motor-
Knob
in ON
Position
Figure 19 - Pilot
Pilot Burner
Thermocouple