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VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
FA-20BB
FAS-20BB
FA-30BB
FAS-30BB
FGH-30NGB
20,000 and 30,000
Btu/Hr Models
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal
injury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical 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.
— Installation and service must be performed by
a qualified installer, service agency, or the
gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohib-
ited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
BLUE FLAME
Save this manual for future reference.
®
WARNING: Improper instal-
lation, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correct installation and op-
erational procedures. For as-
sistance or additional infor-
mation consult a qualified in-
staller, service agency, or the
gas supplier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) from the room in which it
is installed. Provisions for ad-
equate combustion and venti-
lation air must be provided.
Refer to Air For Combustion
and Ventilation section on page
4 of this manual.
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Table of Contents
Related Manuals for Desa Glo-Warm FA-20BB
Summary of Contents for Desa Glo-Warm FA-20BB
- Page 1 BLUE FLAME VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL FA-20BB FAS-20BB FA-30BB FAS-30BB ® FGH-30NGB 20,000 and 30,000 Btu/Hr Models WARNING: Improper instal- WARNING: If the information in this manual is lation, adjustment, alteration, not followed exactly, a fire or explosion may...
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Page 2: Safety Information
BLUE FLAME NATURAL GAS HEATER SAFETY This appliance is only for use with the Do not run heater type of gas indicated on the rating plate. • where flammable liquids or vapors INFORMATION This appliance is not convertible for use are used or stored with other gases. -
Page 3: Product Identification
OWNER’S MANUAL PRODUCT PRODUCT IDENTIFICATION FEATURES Control Knob Ignitor Button SAFETY DEVICE This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS). The ODS/pilot is a required feature for vent- free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air. -
Page 4: Air For Combustion And Ventilation
BLUE FLAME NATURAL GAS HEATER AIR FOR PROVIDING ADEQUATE Confined and Unconfined Space VENTILATION COMBUSTION AND The National Fuel Gas Code (ANS Z223.1, 1992 Section 5.3) defines a confined space The following are excerpts from National VENTILATION as a space whose volume is less than 50 Fuel Gas Code. -
Page 5: Determining Fresh-Air Flow For Heater Location
OWNER’S MANUAL AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this worksheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. -
Page 6: Ventilation Air
BLUE FLAME NATURAL GAS HEATER AIR FOR COMBUSTION AND 12" VENTILATION Continued VENTILATION AIR Ventilation Grills Into Adjoining Room, Ventilation Ventilation Air From Inside Option 2 Grills Building into Adjoining Remove Room, Door into This fresh air would come from an adjoining Option 1 Adjoining unconfined space. -
Page 7: Check Gas Type
OWNER’S MANUAL INSTALLATION LOCATING HEATER IMPORTANT: Vent-free heaters add mois- ture to the air. Although this is beneficial, This heater is designed to be mounted on a wall. installing heater in rooms without enough NOTICE: This heater is intended ventilation air may cause mildew to form for use as supplemental heat. - Page 8 This method provides the strongest hold. Insert mounting screws through mounting Floor bracket and into wall studs. Models FA-20BB and FAS-20BB Figure 8 - Folding Anchor Attaching To Wall Anchor Figure 7 - Mounting Bracket Clearances This method allows you to attach mounting...
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Page 9: Connecting To Gas Supply
OWNER’S MANUAL INSTALLATION Typical Inlet Pipe Diameters 7. Hold spacer in place with one hand. With other hand, insert mounting screw FA-20BB, 3/8" or greater Continued through bottom mounting hole and FAS-20BB spacer. Place tip of screw in opening Placing Heater On Mounting FA-30BB, 1/2"... -
Page 10: Checking Gas Connections
BLUE FLAME NATURAL GAS HEATER INSTALLATION Test Pressures Equal To or Less Than Pressure Testing Heater Gas 1/2 PSIG (3.5 K Pa) Connections Continued 1. Close manual shutoff valve (see Fig- Open manual shutoff valve (see Fig- ure 13). CHECKING GAS ure 13). -
Page 11: Operating Heater
OWNER’S MANUAL OPERATING LIGHTING Note: If pilot does not stay lit, refer to Troubleshooting, pages 15 through INSTRUCTIONS HEATER 17. Also contact a qualified service STOP! Read the safety information person or gas supplier for repairs. THERMOSTAT MODELS above. Until repairs are made, light pilot with match. - Page 12 Replace front panel. LIGHTING Shutting Off Burner Only INSTRUCTIONS (pilot stays lit) NON-THERMOSTAT MODELS STOP! Read the safety information FA-20BB, FA-30BB AND Turn control knob clockwise Clockwise above. the PILOT position. FGH-30NGB 2. Make sure manual shutoff valve is THERMOSTAT FOR YOUR SAFETY fully open.
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Page 13: To Turn Off Gas To Appliance
OWNER’S MANUAL OPERATING MANUAL LIGHTING PROCEDURE HEATER Remove front panel (see Figure 6, Continued page 8). 7. Press in control knob and turn back Follow steps 1 through 5 under Light- to PILOT/IGN. This should cause ing Instructions, page 12. the piezo ignitor to spark and light With control knob pressed in, strike the pilot gas. -
Page 14: Inspecting Burner
BLUE FLAME NATURAL GAS HEATER INSPECTING BURNER FLAME PATTERN CLEANING AND BURNER MAINTENANCE Figure 21 shows a correct burner flame pattern. Figure 22 shows an incorrect burner flame pattern. The incorrect burner flame Check pilot flame pattern and burner flame pattern shows yellow tipping of the flame. -
Page 15: Troubleshooting
OWNER’S MANUAL TROUBLESHOOTING CAUTION: Never use a wire, WARNING: Turn off and un- needle, or similar object to clean plug heater and let cool before Note: For additional help, visit DESA ODS/pilot. This can damage ODS/ servicing. Only a qualified ser- International’s Technical Service web pilot unit. - Page 16 BLUE FLAME NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean burner (see Cleaning and Mainte- nance, page 14) or replace burner orifice 2. Burner orifice diameter is too small 2.
- Page 17 OWNER’S MANUAL TROUBLESHOOTING Continued WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical 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.
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Page 18: Specifications
This will protect your warranty coverage for • burner will have delayed ignition parts replaced under warranty. If so, contact DESA International’s Techni- • heater will not produce specified heat cal Service Department at 1-800-323-5190. PARTS UNDER WARRANTY When Gas Quality Is Bad You can also visit DESA International’s... -
Page 19: Parts Centrals
ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories, call DESA International’s Parts Department at 1-800-972-7879 for referral information. You can also write to the ad- dress listed on the back page of this manual. -
Page 20: Illustrated Parts Breakdown
BLUE FLAME NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN THERMOSTAT MODELS FAS-20BB FAS-30BB 24-1 24-2 ODS/Pilot Assembly 105568... -
Page 21: Parts List
OWNER’S MANUAL PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 18 of this manual. THERMOSTAT MODELS FAS-20BB FAS-30BB PART NUMBER FOR FAS-20BB FAS-30BB DESCRIPTION QTY. L98409-10 L98409-09 Cabinet Assembly... - Page 22 BLUE FLAME NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN NON-THERMOSTAT MODELS FA-20BB, FA-30BB, AND FGH-30NGB 28-1 28-2 ODS/Pilot Assembly 105568...
- Page 23 OWNER’S MANUAL PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 18 of this manual. NON-THERMOSTAT MODELS FA-20BB, FA-30BB, AND FGH-30NGB PART NUMBER FOR FA-20BB FA-30BB...
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Page 24: Warranty Information
VENT-FREE RESIDENTIAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for two (2) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.
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