Desa MPF18VNA, MPF18VPA Contact local natural or, Replace burner orifices, Replace damaged burner

Page 14

TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is re- leased

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Safety interlock system has been triggered

4.Equipment shutoff valve not fully open

5.Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This problem could be caused by one or both of the following:

A)Low gas pressure

B)Dirty or partially clogged ODS/Pilot

6.Thermocouple connection loose at control valve

7.Thermocouple damaged

8.Control valve damaged

1.Press in control knob fully

2.After ODS/pilot lights, keep control knob pressed in for 30 seconds

3.Wait one minute for safety in- terlock system to reset. Repeat ignition operation

4.Fully open equipment shutoff valve

5.A) Contact local natural or propane/LP gas company

B)Clean ODS/pilot (see Cleaning and Maintenance, page 12) or replace ODS/ pilot assembly

6.Hand tighten until snug, then tighten 1/4 turn more

7.Replace pilot assembly

8.Replace control valve

Burner does not light after ODS/

1. Inlet gas pressure is too low

1.

Contact local natural or

pilot is lit

2.

Burner orifice(s) clogged

 

propane/LP gas company

 

2.

Clean burner(s) (see Cleaning

 

 

 

 

 

and Maintenance, page 12) or

 

 

 

 

 

replace burner orifice(s)

 

3.

Remote selector in OFF

3.

Put remote selector in ON

 

 

position (Remote use only)

 

position

 

4.

Wire disconnected from gas

4.

See Wiring Diagram, page

 

 

control (Remote use only)

 

17)

 

 

 

 

Delayed ignition of burner

1. Manifold pressure is too

1.

Contact local natural or

 

 

low

 

 

propane/LP gas company

 

2.

Burner orifice(s) clogged

2.

Clean burner(s) (see Cleaning

 

 

 

 

 

and Maintenance, page 12)

 

 

 

 

Burner backfiring during com-

1. Burner orifice is clogged or

1.

Clean burner (see Cleaning

bustion

 

damaged

 

 

and Maintenance, page 12) or

 

 

 

 

 

replace burner orifice

 

2.

Damaged burner

 

2.

Replace damaged burner

 

3.

Gas appliance

regulator

3.

Replace gas regulator

 

 

defective

 

4.

Correct external gas regulator

 

4.

External gas

regulator

 

 

defective or set to incorrect

 

pressure or replace if

 

 

pressure

 

 

defective

14

www.desatech.com

114925-01C

Image 14
Contents What to do if YOU Smell GAS MPF24VNA, MPF24VPA MPF18VNA and MPF18VPATable of Contents Safety Information Provide adequate clearances around air openings Local CodesHigh traffic areas Windy or drafty areas Remove log set assembly from carton Product FeaturesInstallation Product IdentificationVenting Specifications for Installation and ClearancesFlue Opening Specifications InstallationInstallation Items Needed Installing ApplianceConnecting to GAS Supply Natural From Gas Meter 5 W.C.** to 10.5 W.C. Pressure Checking GAS ConnectionsTest Pressures In Excess Of 1/2 Psig 3.5 kPa Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Placement of Loose EmbersPressure Testing Appliance Gas Connections Operating Appliance ON/OFF Series Model HRC100 Inspecting BurnersPilot Flame Pattern Check pilot flame pattern and burner flame pat- terns oftenTechnical Service Service HintsCleaning Maintenance Replacement PartsTroubleshooting Observed Problem Possible Cause RemedyReplace burner orifices Contact local natural orPilot is lit Burner orifices clogged Propane/LP gas company Replace burner orificeGas regulator defective Burners are lit Position when burners areCleaners or similar products Control valve defective Check manifold pressureGas leak. See Warning statement at top Gas leak. See WarningStatement at top Wiring Diagram SpecificationsAccessories Illustrated Parts Breakdown MPF24VNA, MPF24VPA MPF18VNA, MPF18VPAParts List Limited Warranty Vented GAS LOG Appliances Warranty InformationKeep this Warranty

MPF18VNA, MPF24VPA, MPF18VPA specifications

The Desa MPF24VPA, MPF18VPA, and MPF18VNA are innovative models designed for efficient heating solutions tailored to a variety of residential and commercial applications. These products showcase advanced technology and engineering that cater to diverse consumer needs, making them notable players in the heating equipment market.

One of the defining features of the Desa MPF series is their high heating capacity. The MPF24VPA, for instance, can deliver a robust output suitable for larger spaces, while the MPF18VPA and MPF18VNA offer slightly lower capacities, making them ideal for smaller areas. This range allows consumers to choose models according to the specific requirements of their environments.

Energy efficiency is another hallmark of the Desa MPF series. These models incorporate state-of-the-art combustion technology, ensuring maximum fuel utilization and reduced emissions. With features such as automatic ignition and efficient heat exchangers, users can expect quick heat responses and consistent comfort without wasting energy, contributing to lower utility bills.

Durability and user-friendly operation are also significant characteristics of the MPF24VPA, MPF18VPA, and MPF18VNA. Constructed with high-quality materials and components, these heaters are built to withstand the rigors of regular use. Moreover, the intuitive controls make operation straightforward, allowing users to easily adjust settings to suit their needs.

Safety is always a top priority in any heating appliance, and Desa takes this aspect seriously. The MPF series includes several safety features, such as automatic shut-off in case of overheating, low oxygen sensors, and robust construction that prevents overheating and accidental damage. These precautions ensure that consumers can enjoy their heating solutions confidently.

Additionally, the MPF series features versatile installation options. The models can be configured for vented or vent-free operation, providing flexibility based on local regulations or personal preferences. Their sleek designs are also aesthetically pleasing, allowing them to blend seamlessly into various home or office environments.

In conclusion, the Desa MPF24VPA, MPF18VPA, and MPF18VNA are exemplary heating units that combine efficiency, effectiveness, and safety. With diverse features and options designed to cater to a wide audience, these models stand out as reliable choices for anyone looking for high-quality heating solutions. Whether for a cozy home or a bustling commercial space, the Desa MPF series is engineered to deliver warmth and comfort through innovative design and technology.