Desa A - Manual
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Table of Contents:
- Page 2 – CONTENTS; SECTION; SAFETY; WARNINGS; DANGER; Carbon monoxide poisoning may lead to death!; Early signs of carbon monoxide poisoning; Natural Gas; : Natural gas is odorless. An odor-making agent is added to natural
- Page 3 – Continued; Any change to this heater or its controls can be dangerous.
- Page 4 – dealer where you bought heater.; Safety Device
- Page 5 – WARNING; PRODUCING ADEQUATE VENTILATION; Unusually Tight Construction; and; Unconfined Space
- Page 6 – You must provide additional ventilation air in a confined space.; DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION; Determining if You Have a Confined or Unconfined Space
- Page 7 – Ventilation Air From Inside Building; Figure 2 - Ventilation Air from Inside Building
- Page 8 – Ventilation Air From Outdoors; Figure 3 - Ventilation Air from Outdoors
- Page 9 – NOTICE; CHECK GAS TYPE; This heater is designed to be mounted on a wall.; Never install the heater; CAUTION
- Page 10 – Figure 5 - Attaching Thermostat Sensing Bulb; For convenience and efficiency, install heater; THERMOSTAT SENSING BULB; Locating Thermostat Sensing Bulb; opening in bottom of heater.; Figure 4 - Mounting Clearances As Viewed From Front of Heater; INSTALLING; If you install the heater in a home garage
- Page 11 – INSTALLING HEATER TO WALL; Mounting Bracket; Methods For Attaching Mounting Bracket To Wall; Attaching to wall stud; This method provides the strongest hold. Insert mounting; Attaching to wall anchor; This method allows you to attach mounting bracket to; Figure 6 - Bracket Location; Removing Front Panel Of Heater; Figure 7 - Removing Front Panel Of Heater
- Page 12 – Marking Screw Locations; Figure 8 - Mounting Bracket Clearances; Attaching Mounting Bracket To Wall; Attaching to wall stud method; Figure 9 - Folding Anchor
- Page 13 – “pop” open anchor wings.; Figure 10 - Popping Open Anchor Wings For Thin Walls; Placing Heater On Mounting Bracket; Figure 11 - Mounting Heater Onto Mounting Bracket; Installing Bottom Mounting Screws; Figure 12 - Installing Bottom Mounting Screws
- Page 14 – Typical Pipe Diameters
- Page 15 – Figure 13 - Gas Connection; PRESSURE TESTING GAS SUPPLY PIPING SYSTEM; Test Pressures In Excess Of 1/2 PSIG; opening main gas valve located on or near gas meter.
- Page 16 – water to gas joints. Bubbles forming show a leak.; Test Pressures Equal To or Less Than 1/2 PSIG; gas valve located on or near gas meter.; PRESSURE TESTING HEATER GAS CONNECTIONS; internal joints for leaks.; Figure 14 - Manual Shutoff Valve; Figure 15 - Checking Gas Joints; CHECKING
- Page 17 – Thermostat Models; Figure 16 - Control Knob In The OFF Position; LIGHTING INSTRUCTIONS
- Page 19 – TO TURN OFF GAS TO APPLIANCE; OPERATING; Shutting Off Heater; to the OFF position.; to the PILOT position.; THERMOSTAT CONTROL OPERATION
- Page 20 – Model; Figure 18 - Control Knob In The OFF Position
- Page 22 – Shutting Off Burner Only (pilot stays lit); MANUAL LIGHTING PROCEDURE; INSPECTING; Check pilot flame pattern and burner flame pattern often.; PILOT FLAME PATTERN; Figure 20 - Correct Pilot Flame Pattern; Figure 21 - Incorrect Pilot Flame Pattern
- Page 23 – BURNER FLAME PATTERN; Figure 22 - Correct Burner Flame Pattern; CORRECT FLAME PATTERN
- Page 24 – CABINET; Air Passageways; SHOOTING; Turn off heater and let cool before cleaning.; REMEDY
- Page 28 – SPECIFICATIONS; When gas pressure is too low
- Page 29 – age for parts replaced under warranty.; Parts Under Warranty; Parts Not Under Warranty; When calling DESA International, have ready; PARTS
- Page 30 – ACCESSORIES
- Page 31 – 2 ODS/Pilot Assembly
- Page 33 – PARTS LIST
- Page 34 – NOTES
- Page 36 – LIMITED WARRANTY; WARRANTY INFORMATION; KEEP THIS WARRANTY; INTERNATIONAL
BLUE-FLAME VENT-FREE
NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Heater Sizes: 18,000 BTU/Hr Non-Thermostat,
18,000 BTU/Hr Thermostat, and 28,000 BTU/Hr Thermostat
“A” Model Heaters
Save this manual for future reference.
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.
®
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Summary
2 099569 CONTENTS SECTION PAGE SAFETY INFORMATION WARNING ICON G 001 WARNINGS IMPORTANT: Read this owner’s manual carefully and completely beforetrying to assemble, operate, or service this heater. Improper use of thisheater can cause serious injury or death from burns, fire, explosion,electrical sh...
3 099569 SAFETY INFORMATION Continued WARNING ICON G 001 WARNINGS Continued WARNING: Any change to this heater or its controls can be dangerous. 1. Use only natural gas. Do not convert heater to use different fuel type.2. If you smell gas • shut off gas supply• do not try to light any appliance• do ...
4 099569 PRODUCT IDENTIFICATION LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of localcodes, use the latest edition of the National Fuel Gas Code ANSI Z223, alsoknown as NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New Yo...
