Desa VFN30R, VFN24R, VFN18R Troubleshooting, Observed Problem Possible Cause Remedy

Page 18

FIREPLACE MANUFACTURERS INC.

UNVENTED NATURAL GAS LOG HEATER

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

Note: All troubleshooting items are listed in order of operation.

WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

When ignitor button is pressed, there is no

1.

Ignitor electrode not connected to igni-

1.

Reconnect ignitor cable

spark at ODS/pilot

 

tor cable

 

 

 

2.

Ignitor cable pinched or wet

2.

Free ignitor cable if pinched by any

 

 

 

 

metal or tubing. Keep ignitor cable dry

 

3.

Piezo ignitor nut is loose

3.

Tighten nut holding piezo ignitor to base

 

 

 

 

panel of log set. Nut is located behind

 

 

 

 

base panel

 

4.

Broken ignitor cable

4.

Replace ignitor cable

 

5.

Bad piezo ignitor

5.

Replace piezo ignitor

 

6.

Ignitor electrode positioned wrong

6.

Replace ignitor

 

7.

Ignitor electrode broken

7.

Replace ignitor

 

 

 

 

 

When ignitor button is pressed, there is

1.

Gas supply turned off or equipment

1.

Turn on gas supply or open equipment

spark at ODS/pilot but no ignition

 

shutoff valve closed

 

shutoff valve

 

2.

Control knob not in PILOT position

2.

Turn control knob to PILOT position

 

3.

Control knob not pressed in while in

3.

Press in control knob while in PILOT

 

 

PILOT position

 

position

 

4.

Air in gas lines when installed

4.

Continue holding down control knob.

 

 

 

 

Repeat igniting operation until air is re-

 

 

 

 

moved

 

5.

ODS/pilot is clogged

5.

Clean ODS/pilot (see Cleaning and

 

 

 

 

Maintenance, page 17) or replace ODS/

 

 

 

 

pilot assembly

 

6.

Gas control setting is not correct

6.

Replace gas control

 

 

 

 

 

ODS/pilot lights but flame goes out when

1.

Control knob not fully pressed in

1.

Press in control knob fully

control knob is released

2.

Control knob not pressed in long enough

2.

After ODS/pilot lights, keep control

 

 

 

 

knob pressed in 30 seconds

 

3.

Equipment shutoff valve not fully open

3.

Fully open equipment shutoff valve

 

4.

Pilot flame not touching thermocouple,

4.

A) Contact local natural gas company

 

 

which allows thermocouple to cool,

 

B) Clean ODS/pilot (see Cleaning and

 

 

causing pilot flame to go out. This prob-

 

Maintenance, page 17) or replace ODS/

 

 

lem could be caused by one or both of

 

pilot assembly

 

 

the following:

 

 

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged ODS/pilot

 

 

 

5.

Thermocouple connection loose at con-

5.

Hand tighten until snug, then tighten 1/4

 

 

trol valve

 

turn more

 

6.

Thermocouple damaged

6.

Replace thermocouple

 

7.

Gas control damaged

7.

Replace gas control

www.desatech.com

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105072

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Contents Unvented VENT-FREE Natural GAS LOG Heater What to do if YOU Smell GASSafety Information Fireplace Manufacturers INC Unvented Natural GAS LOG HeaterProduct Features Product Identification Local CodesUnpacking Unusually Tight Construction AIR for Combustion and VentilationProviding Adequate Ventilation Confined and Unconfined SpaceAIR for Combustion Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Building Ventilation AIRVentilation Air From Inside Ventilation Air From OutdoorsInstallation Check GAS TypeIf Using Mantel Minimum Noncombustible Material ClearancesFloor Clearances Determining Minimum Mantel Clearance When Using a HoodMantel Clearances Determining Minimum Mantel ClearanceInstallation Items Needed Installing Damper Clamp Accessory for Vented OperationInstalling Heater Base Assembly Area of Various Standard Round FluesConnecting to GAS Supply Gas supply. Follow all local codesPressure Testing gas Supply Piping system Pressure Testing Heater Gas ConnectionsChecking GAS Connections Installing Logs Installing Front Log #1For Your Safety Read Before Lighting Operating HeaterLighting Instructions Manual Lighting Procedure To Turn OFF GAS to ApplianceOptional Remote Operation Inspecting Burners Pilot Flame PatternFront Burner Flame Pattern Cleaning and MaintenanceCleaning Burner Injector Holder and Pilot AIR Inlet Hole LogsTroubleshooting Observed Problem Possible Cause RemedySee Wiring Diagram, Gas leak. See Warning statement Replacement Parts SpecificationsWiring Diagram Service HintsIllustrated Parts Breakdown VFN18R VFN24R VFN30RParts List KEY Part Numbers VFN18R VFN24R VFN30R Description QTYAccessories 105072 Warranty Information

VFN24R, VFN18R, VFN30R specifications

Desa VFN18R, VFN24R, and VFN30R are a series of innovative heating solutions designed to meet varying heating needs while offering efficiency and reliability. Each model in the VFN range has unique features tailored to residential and commercial applications, contributing to versatile heating solutions.

One of the main characteristics of the VFN series is their impressive heating capacities. The VFN18R model is designed to deliver up to 18,000 BTU/hour, making it suitable for medium-sized spaces. The VFN24R, with its 24,000 BTU/hour output, is ideal for larger areas where more substantial heating is required. Finally, the VFN30R boasts an output of 30,000 BTU/hour, making it a powerful option for substantial heating demands, whether in warehouses, workshops, or expansive living spaces.

These models incorporate advanced technologies to maximize efficiency and performance. Each unit features a high-efficiency heat exchanger designed to produce a more significant amount of heat with lower fuel consumption. This not only translates into cost savings for the user but also reduces environmental impact by minimizing emissions.

In addition, the VFN series is built with a user-friendly interface, making operation straightforward. The units often include programmable thermostats, allowing users to set desired temperatures and schedules, optimizing energy consumption based on specific heating needs. Some models also come with remote control capabilities, offering added convenience.

Safety is a top priority for the VFN models. They come equipped with safety features such as an automatic shut-off system, which activates in case of overheating or malfunction. This contributes to peace of mind, especially in environments with high activity levels or sensitive materials.

The design of the VFN series also enhances their usability and adaptability. These units are compact and can be easily mounted on walls or placed in corners without taking up excessive space. Their aesthetic design allows them to blend seamlessly into different settings, from modern homes to traditional establishments.

In summary, the Desa VFN18R, VFN24R, and VFN30R are versatile heating solutions combining efficiency, safety, and ease of use. With varied heating capacities tailored for different needs and advanced technologies that enhance performance, these models stand out as reliable options for anyone seeking effective heating solutions. Whether for residential comfort or commercial utility, the VFN series delivers on multiple fronts.
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