Vanguard Heating VN1800ITB, VN2550ITB Troubleshooting, Observed Problem Possible Cause Remedy

Page 15

OWNER’S MANUAL

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 in, there is no

1.

Ignitor electrode positioned wrong

1.

Replace ignitor

spark at ODS/pilot

2.

Ignitor electrode broken

2.

Replace ignitor

 

3.

Ignitor electrode not connected to igni-

3.

Reconnect ignitor cable

 

 

tor cable

 

 

 

4.

Ignitor cable pinched or wet

4.

Free ignitor cable if pinched by any

 

 

 

 

metal or tubing. Keep ignitor cable dry

 

5.

Broken ignitor cable

5.

Replace ignitor cable

 

6.

Bad piezo ignitor

6.

Replace control valve (piezo is part of

 

 

 

 

control valve)

 

7.

Piezo ignitor nut is loose

7.

Tighten nut holding piezo ignitor. Nut

 

 

 

 

is located inside heater cabinet at top

When ignitor button is pressed in, there is a spark at ODS/pilot but no ignition

1.Gas supply turned off or equipment shutoff valve closed

2.Control knob not fully pressed in while pressing ignitor button (non-thermostat models only)

Thermostat control knob not fully pressed in while pressing ignitor button (thermostat models only)

3.Air in gas lines when installed

4.ODS/pilot is clogged

5.Gas regulator setting is not correct

6.Thermostat control knob not in pilot position

1.Turn on gas supply or open equipment shutoff valve

2.Fully press in control knob while press- ing ignitor button (non-thermostat mod- els only)

Fully press in thermostat control knob while pressing ignitor button (thermo- stat models only)

3.Continue holding down control knob. Re- peat igniting operation until air is removed

4.Clean ODS/pilot (see Cleaning and Maintenance, page 14) or replace ODS/ pilot assembly

5.Replace gas regulator

6.Turn thermostat control knob to pilot position

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.

Thermocouple connection loose at con-

4.

Hand tighten until snug, then tighten 1/4

 

 

trol valve

 

turn more

 

5.

Pilot flame not touching thermocouple,

5.

A) Contact local natural gas company

 

 

which allows thermocouple to cool,

 

 

 

 

causing pilot flame to go out. This prob-

 

B) Clean ODS/pilot (see Cleaning and

 

 

lem could be caused by one or both of

 

Maintenance, page 14) or replace ODS/

 

 

the following:

 

pilot assembly

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged ODS/pilot

 

 

 

6.

Thermocouple damaged

6.

Replace thermocouple

 

7.

Control valve damaged

7.

Replace control valve

 

8.

Safety interlock system has been trig-

8.

Wait one minute for safety interlock sys-

 

 

gered (thermostat models only)

 

tem to reset. Repeat ignition operation

www.desatech.com

Continued

 

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Contents What to do if YOU Smell GAS Infrared VENT-FREE Natural GAS HeaterVENT-FREE Natural GAS Heater Safety InformationUnpacking Product FeaturesProduct Identification Local CodesConfined and Unconfined Space AIR for Combustion and VentilationProviding Adequate Ventilation Unusually Tight ConstructionAIR for Combustion Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Check GAS Type InstallationInstallation Items Locating HeaterThermostat Sensing Bulb Installing Heater to WallInstalling Bottom Mounting Screws Attaching Mounting Bracket To WallPlacing Heater On Mounting Bracket Typical Inlet Pipe Diameters Connecting to GAS SupplyPressure Testing Gas Supply Piping System Pressure Testing Heater Gas ConnectionsChecking GAS Connections For Your Safety Read Before Lighting Operating HeaterLighting Instructions Thermostat Operation Manual Lighting ProcedureTo Select Heating Level To Turn OFF GAS To ApplianceInspecting Burner Cleaning and MaintenanceObserved Problem Possible Cause Remedy TroubleshootingVENT-FREE Natural GAS Heater Heater produces unwanted odors VN1800ITB Illustrated Parts BreakdownKEY Part Number Description QTY Parts ListVN2550ITB20 VN2550ITB Service Hints SpecificationsReplacement Parts Technical ServiceModels VN1800ITB GA4000B Models VN2550ITB GA4010B AccessoriesEquipment Shutoff Valve GA5010 Floor Mounting StandWarranty Information

VN2550ITB, VN1800ITB specifications

The Vanguard Heating VN1800ITB and VN2550ITB are high-efficiency heating solutions designed to cater to the diverse needs of residential and commercial spaces. These units exemplify advanced technology, offering reliable and consistent warmth while prioritizing energy efficiency.

The VN1800ITB model is engineered to deliver a powerful heating capacity of 18,000 BTUs, making it suitable for medium-sized rooms. It boasts a sleek design that allows for seamless integration into various decor styles. One of the standout features of the VN1800ITB is its innovative variable-speed blower, which not only enhances comfort by maintaining even temperatures but also reduces energy consumption. The blower adjusts its speed based on demand, resulting in quieter operation and improved efficiency.

In addition, the VN1800ITB includes a state-of-the-art digital thermostat that enables precise temperature control. Users can easily program heating schedules, leading to further savings on energy bills. The inclusion of a high-quality air filter improves indoor air quality by trapping dust and allergens, making it an ideal choice for households with allergy sufferers.

On the other hand, the VN2550ITB offers an impressive heating capacity of 25,000 BTUs, making it suitable for larger areas. This model incorporates similar advanced features as its counterpart, including the variable-speed blower and digital thermostat. However, it also features enhanced insulation, which minimizes heat loss and increases overall efficiency. The VN2550ITB is equipped with advanced safety features, including overheat protection and a flame rollout switch, ensuring the unit operates safely even in demanding conditions.

Both models utilize cutting-edge combustion technology that maximizes warmth while minimizing emissions. This commitment to environmental responsibility not only helps users meet local regulations but also contributes to a greener planet.

In conclusion, the Vanguard Heating VN1800ITB and VN2550ITB combine performance, efficiency, and safety features in aesthetically pleasing designs. These heating units provide dependable warmth, programmable convenience, and a commitment to indoor air quality, making them a smart investment for those seeking effective heating solutions.
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