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UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATER
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED
OWNER'S OPERATION AND INSTALLATION MANUAL
FLAME-MAX
Models VYS18NWA,
VYS24NWA, and
VYS30NWA (Millivolt)
Remote Ready
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 sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in
which it is installed. Provisions for adequate combustion and ventilation air must be
provided. Refer to Air for Combustion and Ventilation section on page 4 of this manual.
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
AS VENTED DECORATIVE APPLIANCES
®
Save this manual for future reference.
®
Patent Pending
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tion and operational procedures. For
assistance or additional information
consult a qualified installer, service
agency, or the gas supplier.
WARNING: This appliance is for in-
stallation only in a solid-fuel burning
masonry or UL127 factory-built fire-
place, or in an approved ventless fire-
box. It is design certified for these
installations in accordance with ANSI
Z21.11.2. Exception: Do not install this
appliance in a factory-built fireplace
that includes instructions stating it
has not been tested or should not be
used with unvented gas logs.
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Table of Contents
Related Manuals for Vanguard VYS18NWA
Summary of Contents for Vanguard VYS18NWA
- Page 1 NATURAL GAS LOG HEATER VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED AS VENTED DECORATIVE APPLIANCES OWNER’S OPERATION AND INSTALLATION MANUAL ® FLAME-MAX Models VYS18NWA, VYS24NWA, and VYS30NWA (Millivolt) Remote Ready Patent Pending WARNING: Improper installation, adjust- WARNING: If the information in this...
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Page 2: Safety Information
VANGUARD UNVENTED NATURAL GAS LOG HEATER SAFETY This heater shall not be installed in a Due to high temperatures, the bedroom or bathroom unless installed appliance should be located out INFORMATION as a vented appliance (see Installing of traffic and away from furniture Damper Clamp Accessory for Vented and draperies. -
Page 3: Local Codes
OWNER’S MANUAL SAFETY LOCAL CODES PRODUCT INFORMATION FEATURES Install and use heater with care. Follow all Continued local codes. In the absence of local codes, use OPERATION the latest edition of The National Fuel Gas 12. Do not use heater if any part has been Code ANSI Z223.1/NFPA 54*. -
Page 4: Air For Combustion And Ventilation
VANGUARD UNVENTED NATURAL GAS LOG HEATER AIR FOR PROVIDING ADEQUATE Confined and Unconfined Space VENTILATION COMBUSTION AND The National Fuel Gas Code, ANSI Z223.1/ NFPA 54 defines a confined space as a space The following are excerpts from National VENTILATION whose volume is less than 50 cubic feet per Fuel Gas Code ANSI Z223.1/NFPA 54, Sec-... -
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 work sheet 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 VANGUARD UNVENTED NATURAL GAS LOG HEATER AIR FOR 12" COMBUSTION AND VENTILATION Ventilation Continued Ventilation Grills Grills VENTILATION AIR Into Adjoining Room, Into Adjoining Option 2 Room, Remove Ventilation Air From Inside Option 1 Door into Building Adjoining This fresh air would come from an adjoining Room, unconfined space.
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Page 7: Check Gas Type
OWNER’S MANUAL INSTALLATION MINIMUM FIREPLACE WARNING: Never install the CLEARANCE TO heater NOTICE: This heater is intended COMBUSTIBLE MATERIALS • in a bedroom or bathroom un- for use as supplemental heat. Use less installed as a vented ap- Log Size Side Wall Ceiling this heater along with your pri-... - Page 8 VANGUARD UNVENTED NATURAL GAS LOG HEATER INSTALLATION IMPORTANT: If you cannot meet these If Using Mantel minimum clearances, you must operate You must have noncombustible material(s) Continued heater with chimney flue damper open. Go above the fireplace opening. Noncombus- to Installing Damper Clamp Accessory for...
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Page 9: Mantel Clearances
OWNER’S MANUAL INSTALLATION Mantel Shelf 10" Underside of Continued 8" Mantel Shelf 6" MANTEL CLEARANCES 1 /2 " In addition to meeting noncombustible mate- rial clearances, you must also meet required All minimum clearances between fireplace opening and distances are mantel shelf. -
Page 10: Installing Damper Clamp Accessory For Vented Operation
VANGUARD UNVENTED NATURAL GAS LOG HEATER INSTALLATION Damper Clamp Continued INSTALLING DAMPER CLAMP ACCESSORY FOR Damper Damper VENTED OPERATION Clamp Damper Note: When used as a vented heater, appli- Damper ance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material. - Page 11 OWNER’S MANUAL INSTALLATION INSTALLING GWMS2 IMPORTANT: The wire may be shortened but must not be lengthened. (OPTIONAL) WALL Continued Connect one bare wire end to each of MOUNTED SWITCH the terminals of the provided wall locations in mortar joint of bricks. Items Included for Installation switch.
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Page 12: Connecting To Gas Supply
VANGUARD UNVENTED NATURAL GAS LOG HEATER INSTALLATION We recommend that you install a sediment WARNING: Never connect trap in supply line as shown in Figure 14. Continued heater to private (non-utility) gas Locate sediment trap where it is within wells. This gas is commonly reach for cleaning. -
Page 13: Installing Logs
OWNER’S MANUAL INSTALLATION Equipment Shutoff Valve Control Valve Location Continued Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa) Gas Meter 1. Close equipment shutoff valve (see Figure 15). 2. Pressurize supply piping system by ei- ther using compressed air or opening main gas valve located on or near gas meter. -
Page 14: Operating Heater
VANGUARD UNVENTED NATURAL GAS LOG HEATER OPERATING LIGHTING WARNING: Burner will come INSTRUCTIONS HEATER on automatically within one minute when the selector switch WARNING: is in the ON position after the FOR YOUR SAFETY • If fireplace has glass doors, pilot is lit. -
Page 15: To Turn Off Gas To Appliance
OWNER’S MANUAL OPERATING For wall thermostat operation, follow in- TO TURN OFF GAS struction supplied with thermostat acces- TO APPLIANCE HEATER sory GWMT1. For wall switch operation follow instructions supplied with GWMS2. Continued Shutting Off Heater 1. Turn control knob clockwise NOTICE: You must light the pilot 8. -
Page 16: Inspecting Burners
VANGUARD UNVENTED NATURAL GAS LOG HEATER OPERATING INSPECTING Pilot Burner Thermocouple HEATER BURNERS Continued Check pilot flame pattern and burner flame patterns often. IMPORTANT: This remote control has been specially engineered to PILOT FLAME PATTERN take an air temperature sample ev- ery 5.5 minutes in the auto mode. -
Page 17: Troubleshooting
OWNER’S MANUAL TROUBLESHOOTING WARNING: Turn off heater CAUTION: Never use a wire, Note: For additional help, visit DESA and let cool before servicing. Only needle, or similar object to clean International’s technical service web site a qualified service person should ODS/pilot. - Page 18 VANGUARD UNVENTED NATURAL GAS LOG HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice clogged 1. Clean burner (see Cleaning and Mainte- nance, page 21) or replace burner orifice 2. Inlet gas pressure is too low 2.
- Page 19 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 20: Wiring Diagram
VANGUARD UNVENTED NATURAL GAS LOG HEATER WIRING DIAGRAM REPLACEMENT PARTS Note: For proper operation of optional ac- cessories, the wires from the switch to the Note: Use only original replacement parts. control must be connected exactly as shown. This will protect your warranty coverage for parts replaced under warranty. -
Page 21: Cleaning And Maintenance
OWNER’S MANUAL CLEANING AND LOGS Check the injector holder located at the end of the burner tube again. Remove • If you remove logs for cleaning, refer to MAINTENANCE any large particles of dust, dirt, lint, or Installing Logs, page 13, to properly re- pet hair with a soft cloth or vacuum place logs. -
Page 22: Illustrated Parts Breakdown
VANGUARD UNVENTED NATURAL GAS LOG HEATER ILLUSTRATED PARTS BREAKDOWN FLAME-MAX™ VINTAGE OAK LOG MODELS (VYS18NWA, VYS24NWA, VYS30NWA) 105189... -
Page 23: Parts List
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 20 of this manual. FLAME-MAX™ VINTAGE OAK LOG MODELS (VYS18NWA, VYS24NWA, VYS30NWA) PART NUMBER FOR VYS18NWA VYS24NWA... - Page 24 VANGUARD UNVENTED NATURAL GAS LOG HEATER DAMPER CLAMP - GA6080 ACCESSORIES (Not Shown) Purchase these heater accessories from Permanently opens chimney flue damper your local dealer. If they can not supply for vented operation. Can be used only with these accessories, call DESA International non-thermostat accessories.
- Page 25 OWNER’S MANUAL NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ 105189...
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Page 26: Warranty Information
WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty.