Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD Manual Lighting, Procedure

Page 17

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.

Piezo

Metallic

 

Motor-

Ignitor

Core for

MAN-Knob

Knob

Tab

Manual

in Manual

in ON

 

Ignition

Position

Position

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Piezo Ignitor

 

ON/OFF Switch Microswitch

Figure 18 - Control Valve

Thermocouple

Pilot Burner

 

Figure 19 - Pilot

116986-01B

www.desatech.com

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Contents Models VF-18N-MHD, VF-18P-MHD, VF-24N-MHD VF-24P-MHD What to do if YOU Smell GASTable of Contents Safety Information Product Identification Product IdentificationLocal Codes Product FeaturesUnpacking Air For Combustion VentilationDetermining if You Have a Confined or Unconfined Space Determining fresh-air flow for heater locationConfined and Unconfined Space Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Check GAS Type InstallationInstallation and clearances for vent-free operation Installation Determining Minimum Mantel Clearance When using a Hood Installing Heater AssemblyMantel Clearances Floor ClearancesInstallation Items Needed Connecting to gas supplyPropane/LP Gas Checking gas connectionsNatural Gas Test Pressures Equal To or Less Than Psig 3.5 kPa Pressure Testing Heater Gas ConnectionsAdding Embers, Lava rock and Decorative logs Operating Heater For your safety Read before lightingFunctions Remote ControlManual Lighting ProcedureTo turn gas off To appliance Inspecting BurnersPilot Flame Pattern Lighting with Piezo IgnitorBurner Injector Holder Air Inlet Hole Cleaning MaintenanceBurner Flame Pattern Injector Holder on Front Burner Tube Observed Problem Possible Cause Remedy TroubleshootingSee Cleaning and Mainte Gas leak. See Warning Bad module Replace moduleIdentifying error signals from receiver Wiring DiagramService Hints Replacement PartsTechnical Service AccessoriesModels VF-18N-MHD, VF-18P-MHD, VF-24N-MHD and VF-24P-MHD Illustrated Parts BreakdownParts List Limited Warranty VENT-FREE GAS LOG Heaters Warranty InformationKeep this Warranty