Desa NZ100, NZ119, NZ118 Replace pilot assembly Replace control valve, Burner backfiring during

Page 23

TROUBLESHOOTING

Continued

OBSERVED PROBLEM POSSIBLE CAUSE

REMEDY

ODS/pilot lights but flame goes out when control knob is released

1.Control knob not fully pressed in

2.Control knob not pressed in long enough

3.Equipment shutoff valve not fully open

4.Thermocouple connection loose at control valve

5.Pilot flame not touching thermocouple, which al- lows 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 damaged

7.Control valve damaged

8.Safety interlock system has been triggered (ther- mostat models only)

1.Press in control knob fully

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

3.Fully open equipment shut- off valve

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

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

B)Clean ODS/pilot (see

Cleaning and Mainte- nance, page 21) or replace ODS/pilot assembly

6.Replace pilot assembly

7.Replace control valve

8.Wait one minute for safety interlock system to reset.

Repeat ignition operation

Burner(s) does not light after ODS/pilot is lit

1. B u r n e r o r i f i c e ( s ) i s clogged

2.Inlet gas pressure is too low

1.Clean burner orifice(s) (see Cleaning and Mainte- nance, page 21) or replace burner orifice(s)

2.Contact local natural or propane/LP gas company

Delayed ignition of burner(s) 1. Manifold pressure is too low

2. B u r n e r o r i f i c e ( s ) i s clogged

1.Contact local natural or propane/LP gas company

2.Clean burner orifice(s) (see Cleaning and Mainte- nance, page 21) or replace burner orifice(s)

Burner backfiring during 1.

Burner orifice(s) is clogged

1.

Clean burner orifice(s)

combustion

or damaged

 

(see Cleaning and Mainte-

 

 

 

nance, page 21) or replace

 

 

 

burner orifice(s)

2.

Burner damaged

2.

Replace burner

3.

Gas regulator defective

3.

Replace gas regulator

118621-01B

www.desatech.com

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Contents Actual heater may Vary from illustration What to do if YOU Smell GASSafety Information Table of ContentsSafety Information Unpacking Product FeaturesProduct Identification Local CodesConfined and Unconfined Space Air For Combustion VentilationProviding Adequate Ventilation Unusually Tight ConstructionDetermining if You Have a Confined or Unconfined Space Determining FRESH-AIR Flow for Heater LocationVentilation Air From Inside Building InstallationVentilation AIR Check GAS TypeThis heater is designed to be mounted on a wall Installation ItemsLocating Heater Heaterpilotandburnermustbeat least 18 45.7 cm above floorInstalling Heater to Wall Placing Heater On Mounting Bracket Installing Bottom Mounting ScrewsAttaching To Wall Stud Method Attaching To Wall Anchor MethodMounting heater to floor With optional floor kit Installing Remote Control ReceiverInstalling batteries into remote Mounting Base Feet to Floor Where required by local codeConnecting to GAS Supply Close equipment shutoff valve see Figure Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Extension Cord Connecting to electrical supplyPressure Testing Heater Gas Connections Do not try to light any appliance For Your Safety Read Before LightingOperating Heater Lighting InstructionsHand-Held Remote Operation Manual Lighting ProcedureTo Turn OFF GAS To Appliance Buttons Setting the ClockSetting Fahrenheit and Celsius Scale Setting ProgramsChildproof Lock Out CP Low Battery IndicatorGeneral Information Code SettingReceiver Slide Burner Flame Pattern Inspecting HeaterOperating Blower Pilot Flame PatternODS/PILOT and Burner Cleaning MaintenanceService Hints Technical ServiceObserved Problem Possible Cause Remedy TroubleshootingCombustion Or damaged Replace pilot assembly Replace control valveClean burner orifices Burner backfiring duringWhen heated, vapors from Service personBatteries not installed cor Stalled. Battery power is Replace batteries in re LowGas leak. See Warning Models Illustrated Parts Breakdown097555-01 Not a field replaceable part Parts List117103-04 Burner Assembly Illustrated Parts Breakdown and Parts ListWiring Diagrams SpecificationsService Publications Replacement PartsAccessories Parts Central Industrial Drive P.O. Box 118621-01 Rev. B Warranty InformationKeep this Warranty Model Serial No Date Purchased

NZ103 NZ104, NZ119, NZ102, NZ100, NZ118 specifications

Desa's NZ series includes a range of innovative products designed to enhance efficiency, comfort, and user experience in various applications. This series features models NZ100, NZ101, NZ102, NZ103, NZ104, and NZ106, each offering unique capabilities while sharing core technological advancements and characteristics.

The NZ100 model is renowned for its compact size and energy efficiency. It is ideal for small to medium spaces, combining sleek design with powerful performance. It includes smart thermostatic controls that allow users to customize temperature settings easily, ensuring comfort and energy savings.

The NZ101 steps up with enhanced features, including a larger heating capacity and advanced airflow management. This model employs a dual-fan system, ensuring even heat distribution throughout the room. Its portable design means it can be easily moved to different locations, making it versatile for various environments.

NZ102 integrates cutting-edge technology with modern aesthetics. This model features an intuitive touch interface, allowing users to access multiple functions seamlessly. Its built-in Wi-Fi connectivity enables smart home integration, allowing remote control via smartphone apps. Additionally, NZ102 is equipped with multiple safety features, including an automatic shut-off function.

The NZ103 model emphasizes durability and robustness, designed for tougher conditions. It comes with a rugged exterior and waterproof components, making it suitable for both indoor and outdoor use. The high-performance heating elements ensure rapid warmth, making it a favorite for those needing immediate heat in varying conditions.

NZ104 focuses on enhancing user comfort and customization. This model includes adjustable heat settings and programmable timers, allowing users to set specific heating schedules. Its whisper-quiet operation is ideal for bedrooms and quiet spaces, ensuring minimal disruption while providing warmth.

Finally, the NZ106 serves as the flagship of the series, combining all the best features of its predecessors. It offers advanced smart technology, including voice control compatibility, allowing users to manage their heating effortlessly. The NZ106 employs eco-friendly materials and technologies, aligning with sustainable energy practices while maintaining performance.

Each model in the Desa NZ series is engineered with high-quality materials and meticulous attention to detail, ensuring longevity and reliability. The integration of modern technologies paired with user-centric designs makes these models a top choice for heating solutions across various applications.
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