Desa CDR3924PT Inspecting Burners, Technical Service, Pilot Flame Pattern, Burner Flame Patterns

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INSPECTING BURNERS

Check pilot flame pattern and burner flame pat- terns often.

PILOT FLAME PATTERN

Figure 24 shows a correct pilot flame pattern. Figure 25 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 25

•turn heater off (see To Turn Off Gas to Appli- ance, page 17)

•see Troubleshooting, pages 20

Note: The pilot flame on natural gas units will

have a slight curve, but the flame should be blue

and have no yellow or orange color.

Pilot Burner

Thermocouple

Pilot Burner

 

WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. If burner flame pat- terns show yellow tipping, follow instructions below.Yellow flame on rear burner is normal.

NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.

If burner flame patterns are incorrect, as shown in Figure 27

•turn heater off (see To Turn Off Gas to Appli- ance, page 17)

•see Troubleshooting, page 20

(Natural Gas)

(Propane/LP Gas)

Figure 24 - Correct Pilot Flame Pattern

(Your pilot may vary from pilots shown)

Pilot Burner

Pilot Burner

Thermocouple

 

Figure 26 - Correct Burner Flame Patterns

Yellow Tipping At

Top of Blue Flame

(Natural Gas)

(Propane/LP Gas)

Figure 25 - Incorrect Pilot Flame Pattern

(Your pilot may vary from pilots shown)

BURNER FLAME PATTERNS

Figure 26 shows correct burner flame patterns. Figure 27 shows incorrect burner flame patterns. The incorrect burner flame patterns show yellow tipping at top of blue flame.

Figure 27 - Incorrect Burner Flame Patterns

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA Heating ProductsʼTechnical Service Department at 1-866-672-6040. When calling, please have your model and serial numbers of your heater ready.

You can also visit DESA Heating Productsʼtechni- cal services web site at www.desatech.com.

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www.desatech.com

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Contents What to do if YOU Smell GAS Thermostat Models CDR3924NT and CDR3924PTTable of Contents Safety Information Local Codes Product Features Product IdentificationUnusually Tight Construction AIR for Combustion VentilationDetermining FRESH-AIR Flow for Heater Location Confined and Unconfined SpaceVentilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Installation Check GAS TypeWidth Installation and Clearances for VENT-FREE OperationRear 20 1/4Floor Clearances Determining Minimum Mantel Clearance When Using a HoodMantel Clearances Determining Minimum Mantel ClearanceInstalling Heater Base Assembly Installation Items NeededConnecting to GAS Supply External Regulator With Vent Pointing DownNatural From Gas Checking GAS ConnectionsPropane/LP From Test Pressures In Excess Of 1/2 Psig 3.5 kPaInstalling Logs Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPaAttaching Grate to Base Assembly Adding Lava RockFor Your Safety Read Before Lighting Operating HeaterLighting Instructions Manual Lighting Procedure To Turn OFF GAS To ApplianceThermostat Control Operation Pilot Flame Pattern Technical ServiceInspecting Burners Burner Flame PatternsCleaning Maintenance Burner Injector Holders and Pilot AIR Inlet HolesLogs Troubleshooting Observed Problem Possible Cause RemedyMaintenance, Cold Minute Air in gas line Operate burners until air is Gas leak. See Warning Optional Positioning Thermostat Sensing Bulb For Masonry and FACTORY- Built Metal FireplaceService Hints SpecificationsReplacement Parts AccessoriesIllustrated Parts Breakdown Models CDR3924PT and CDR3924NTParts List Warranty Information Keep this WarrantyLimited Warranty Comfort Glow VENT-FREE GAS LOG Heaters

CDR3924PT specifications

Desa CDR3924PT is an advanced digital control thermostat designed for precise temperature management in residential and commercial settings. Its sleek design and intuitive interface make it a popular choice among homeowners and professionals alike, contributing to enhanced comfort and energy efficiency in various environments.

One of the standout features of the CDR3924PT is its programmable functionality. Users can set different temperature schedules for weekdays and weekends, allowing for tailored climate control to match occupancy patterns. This flexibility can lead to significant energy savings, as the thermostat can automatically adjust heating and cooling based on user preferences and habits.

The unit is equipped with a high-resolution LCD display, offering clear visibility of current temperature settings and system status. Additionally, it provides real-time feedback on energy consumption, allowing users to monitor and adjust usage to optimize efficiency. The intuitive touch controls simplify navigation through the various settings, ensuring that users can easily customize their environment.

Integration with smart home technology is another key characteristic of the CDR3924PT. It is compatible with various home automation systems, enabling users to control their heating and cooling remotely via smartphone apps. This connectivity ensures that users can adjust settings from anywhere, giving them the ability to prepare their home environment before arriving or to fine-tune adjustments on the go.

The CDR3924PT utilizes advanced sensor technology to maintain accurate temperature control. It continuously measures ambient conditions, making real-time adjustments to ensure consistent comfort levels. The thermostat’s adaptive learning capabilities also allow it to learn user preferences over time, further enhancing its ability to maintain optimal conditions with minimal energy consumption.

For safety and convenience, the thermostat features a user-friendly installation process along with compatibility with various HVAC systems. It includes built-in safety protocols that prevent overheating or unwanted system failures, ensuring reliable operation over time.

In summary, the Desa CDR3924PT stands out in the market for its programmable features, smart home integration, and advanced sensor technology, making it a top choice for those seeking efficient and effective temperature management solutions. Whether for residential use or commercial applications, its reliable performance and user-friendly design make it a vital component in modern climate control systems.
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