Desa HRB3624, P)T Optional Positioning Thermostat Sensing Bulb, Thermostat-Controlled Models Only

Page 32

Optional Positioning

of Thermostat

Sensing Bulb

(Thermostat-Controlled Models Only)

For Masonry and Factory- built Metal Fireplace

If your log set cycles to pilot, but the room tem- perature drops to a lower than ideal comfort level before the log set comes back on, you may want to reposition the thermostat sensing bulb.

The thermostat sensing bulb is located on the gas valve assembly. This location allows the ther- mostat to keep the room temperature at an ideal comfort level for most fireplace applications. For positioning the thermostat sensing bulb elsewhere, an adhesive-backed mounting clip is available (see Figure 42).

Tools needed: 5/16" hex driver or socket

1.Locate the gas valve assembly and thermostat sensing bulb (see Figure 43).

2.With 5/16” hex driver or socket, loosen the thermostat screw. Carefully slide the thermo- stat sensing bulb out of the retaining clamp (see Figure 44).

Note: Do not remove the screw. Make sure you tighten the screw after removing the thermostat sensing bulb.

IMPORTANT: Do not force or bend the thermostat sensing bulb or capillary.

3.The thermostat sensing bulb may be located to the lower right front side of fireplace. De- termine location of sensing bulb, but do not mount sensing bulb until step 4. If you have a masonry fireplace, see Figure 45 for location. If you have a factory-built metal fireplace, see Figure 46 for location.

If your fireplace has glass doors, position sensing bulb directly behind door gap on right bottom side (see Figure 47).

Capillary

(Unit Will

Differ From

Illustration)

Thermostat

Sensing Bulb

Screw

Retaining Clamp

 

Figure 44 - Removing Thermostat

Sensing Bulb

Thermostat

Sensing Bulb

Adhesive-backed

Mounting Clip

Figure 45 - Locating Thermostat Sensing

Bulb on Masonry Fireplace

Figure 42 - Adhesive-backed Mounting

Clip

Thermostat

Sensing Bulb

Adhesive-backed

Mounting Clip

(Unit Will

Figure 46 - Locating Thermostat Sensing

Bulb on Factory-built Metal Fireplace

Differ From

 

Illustration)

Thermostat

 

Sensing Bulb

Gas Valve

Adhesive-

Assembly

backed

 

Thermostat

Mounting Clip

 

Sensing Bulb

Glass Doors

Figure 43 - Location of Gas Valve

 

Assembly and Thermostat Sensing Bulb

 

 

Figure 47 - Installing Thermostat Sensing

 

Bulb Behind Glass Doors

32

www.desatech.com

119426-01A

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Contents What to do if YOU Smell GAS Table of Contents Safety InformationSafety Information Unpacking Optional Remote Control Accessories Product FeaturesProduct Identification Local CodesDetermining FRESH-AIR Flow for Heater Location Air For Combustion VentilationProviding Adequate Ventilation Ventilation AIR Ventilation Air From Inside BuildingInstallation Ventilation Air From OutdoorsMinimum Firebox Size Installation and Clearances For Vent-Free OperationCheck GAS Type If Using Mantel Material Requirements for Distance a Safe InstallationDetermining Minimum Mantel Clearance When Using a Hood Mantel ClearancesFloor Clearances Log SetInstalling Damper Clamp Accessory for Vented Operation Installing Heater Base AssemblyArea of Various Standard Round Flues Diameter Chimney Minimum PermanentConnect to gas supply. See Connecting To Gas Supply, Installation Items NeededPosition heater base assembly in fireplace Connecting to GAS Supply External Regulator With Vent Pointing DownNatural Minimum inlet pressure for purpose of input adjustmentPropane/LP Pressure Testing Heater Gas Connections Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Correct all leaks at onceInstalling optional remote accessories Installing Remote ReceiverInstalling Logs VUL Model Logs OnlyInstalling VUL Model Log Sets CRB and HRB Model Logs OnlyFor Your Safety Read Before Lighting Operating HeaterThermostat-Controlled Models Lighting InstructionsManual Lighting Procedure To Turn OFF GAS To ApplianceThermostat Control Operation Shutting Off HeaterRemote-Ready Models Pilot Propane/LP Optional Hand-Held Remote OperationThermostat Series Model HRC200Inspecting Burners Pilot Flame PatternBurner Injector Holder and Pilot Air Inlet Hole Cleaning MaintenanceFront Burner Flame Pattern Wiring Diagram LogsMain burner Remote-Ready Models OnlyTroubleshooting Observed Problem Possible Cause RemedyGoes out when control knob is Safety interlock system hasODS/pilot lights but flame Press in control knob fullyObserve minimum installa When heated, vapors from Turn heater off when usingBattery is not installed. Bat Mote-Ready Models Only Tery power is lowGas leak. See Warning Thermostat-Controlled Models Only Optional Positioning Thermostat Sensing BulbFor Masonry and Factory- built Metal Fireplace Specifications Optional Positioning of Thermostat Sensing BulbThermostat Models VUL18PTVUL18PR, VUL24NR, VUL24PR, VUL30NR and VUL30PR Illustrated Parts Breakdown and Parts ListLog Models 113620-01 113620-04 113620-07 Top Log #1 113620-02 113620-05 Illustrated Parts Breakdown Parts List Listed under Replacement Parts on page 42 of this manualRemote-Ready Variable Control Models VUL18NR, VUL18PR, VUL24NR, VUL24PR, VUL30NR, VUL30PRNo. Part No Description Illustrated Parts Breakdown HRB3924NR Service Hints Technical ServiceReplacement Parts AccessoriesReceiver and HAND-HELD Remote Control KIT HRC100 WALL-MOUNT Thermostat Switch GWMT1WALL-MOUNT ON/OFF Switch GWMS2 Cleaning KIT GCKLimited Warranty VENT-FREE GAS LOG Heaters Warranty InformationKeep this Warranty

VUL 18R, VUL24R, VUL30R, HR B3930, HR 3924R, CRB3624T, VUL 18T, VUL24T, VUL30T, HR B3624T, VUL18, VUL24, VUL30, HRB3930/3924, HRB3624, P)R specifications

Desa P)R, HRB3624, HRB3930/3924, VUL18, VUL24, VUL30, VUL 18R, VUL24R, VUL30R, HR B3930, HR 3924R, CRB3624T, VUL 18T, VUL24T, VUL30T, and HR B3624T are part of an innovative product line designed to enhance efficiency and performance across various applications. These models showcase cutting-edge technologies and features that cater to diverse user needs.

The Desa P)R series is renowned for its robustness and reliability. Engineered with advanced materials, these models offer superior durability, making them suitable for both industrial and commercial environments. Their high-performance capabilities ensure they can handle demanding tasks without compromise.

The HRB3624 and HRB3930/3924 series provide powerful solutions with enhanced energy efficiency. Equipped with state-of-the-art motors and optimized designs, they deliver exceptional output while minimizing energy consumption. These models feature smart technology that adjusts performance based on workload, maximizing efficiency and prolonging equipment life.

VUL series, including VUL18, VUL24, and VUL30, is characterized by their versatility and user-friendly interface. These products incorporate intuitive controls, allowing for easy operation across various settings. The VUL series also features modular designs, enabling easy upgrades and maintenance to keep pace with changing requirements.

For those requiring specialized functions, the VUL 18R, VUL24R, and VUL30R models offer enhanced performance with refined specifications. These editions are optimized for high precision and are particularly suited for applications where accuracy is paramount.

The HR B3930 and HR 3924R models stand out due to their compact design without sacrificing power. Perfect for space-constrained environments, they provide a combination of high efficiency and powerful output, making them ideal for modern facilities.

The CRB3624T, VUL 18T, VUL24T, and VUL30T series incorporate advanced technology for temperature control and monitoring, ensuring optimal performance under varying conditions. These models are equipped with intelligent sensors that provide real-time feedback, allowing users to make informed adjustments.

Finally, the HR B3624T emphasizes thermal efficiency, boasting features that significantly reduce overheating risks and enhance safety. This series prioritizes user safety alongside effective performance.

In conclusion, the comprehensive features and technologies of the Desa P)R series, along with HRB and VUL models, position them as leading choices for industries seeking reliable, efficient, and versatile solutions.