Desa GWN20TA Operating Heater, For Your Safety Read Before Lighting, Lighting Instructions

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Operating Heater

FOR YOUR SAFETY READ

BEFORE LIGHTING

WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result causing property damage, per- sonal injury or loss of life.

A.This appliance has a pilot which must be lighted by hand. When lighting the pi- lot, follow these instructions exactly.

B.BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

Do not touch any electric switch; do not use any phone in your building.

Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

C.Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

D.Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

LIGHTING

INSTRUCTIONS

1.STOP! Read the safety information above.

2.Make sure equipment shutoff valve is fully open.

3.Turn off any electric power to the appli- ance if service is to be performed.

4.Turn control knob clockwise to the OFF position.

5.Wait five minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information above. If you don’t smell gas, go to the next step.

6.Thermostat Models: Turn control knob

counterclockwise to the PILOT position. Press in control knob for five (5) seconds.

Manual Models: Press in and turn control

knob counterclockwise to the PI- LOT position. Keep control knob pressed in for five (5) seconds.

7.With control knob pressed in, push down and release ignitor button. This will light pilot. The pilot is attached to the front of burner. Note: You may be running this heater for the first time after hooking up to gas supply. If so, you may need to press in control knob for 30 seconds or more. This will allow air to bleed from the gas system. If needed, keep pressing ignitor button until pilot lights. If ignitor does not light pilot, re- fer to Troubleshooting, page 19 or contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see

Manual Lighting Procedure, page 16.

8.Keep control knob pressed in for 30 sec- onds after lighting pilot. After 30 seconds, release control knob.

If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.

Note: If pilot goes out, repeat steps 4 thru

7. Thermostat models have a safety inter- lock system. Wait one (1) minute before lighting pilot again.

9.Turn control knob counterclockwise to desired heating level. The main burner should light. Manual control heaters should be used in locked positions.

Ignitor Button Control Knob

Figure 19 - Control Knob In The OFF

Position Manual Control Models

Ignitor Button

Control Knob

 

F

 

F

 

O

Figure 20 - Control Knob In The OFF

Position Thermostat Models

119344-01B

www.desatech.com

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Contents Models GWN20TA, GWP20TA, GWN30TA, GWP30TA, WMN20a, WMP20a What to do if YOU Smell GASSafety Information Table of ContentsSafety Information Unpacking Safety InformationProduct Features Local CodesConfined and Unconfined Space Air For Combustion 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 From Inside Building InstallationVentilation AIR Check GAS TypeThis heater is designed to be mounted on a wall InstallationInstallation Items Locating HeaterInstalling Heater to Wall Attaching To Wall Anchor Method 30,000 Btu/Hr Models20,000 Btu/Hr Models Attaching To Wall Stud MethodMounting Base Feet to Heater Installing Bottom Mounting ScrewsMounting heater to floor With optional floor kit Heater WallTypical Inlet Pipe Diameters Connecting to GAS SupplyTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Checking GAS ConnectionsCorrect all leaks at once Pressure Testing Heater Gas ConnectionsDo not try to light any appliance For Your Safety Read Before LightingOperating Heater Lighting InstructionsThermostat Control Operation Manual Lighting ProcedureOperating Heater To Turn OFF GAS To ApplianceInspecting Heater Pilot Flame PatternBurner Flame Pattern Cabinet Cleaning MaintenanceODS/PILOT and Burner Burner Pilot Air InletObserved Problem Possible Cause Remedy TroubleshootingTroubleshooting Burner orifice Observe minimum installaSlight smoke or odor during BlockedStatement above Gas leak. See WarningTechnical Service SpecificationsService Hints Replacement PartsModels WMN20A, WMP20A, GWN20TA, GWP20TA, GWN30TA and GWP30TA Illustrated Parts BreakdownNJF 8C Parts ListElectronic ignitor Kit GA435 Not Shown AccessoriesEquipment Shutoff Valve GA5010 Base Kit GA4550Parts Centrals Industrial Drive P.O. Box 119344-01 Rev. B Warranty InformationKeep this Warranty Model Serial No Date of Purchase