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INFRARED VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
VN1800ITB
and
VN2550ITB
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, 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*, 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
Save this manual for future reference.
®
WARNING: Improper installa-
tion, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correct installation and opera-
tional procedures. For assis-
tance or additional informa-
tion 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 on page 4 of
this manual.
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Table of Contents
Related Manuals for Vanguard VN1800ITB
Summary of Contents for Vanguard VN1800ITB
- Page 1 INFRARED VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL VN1800ITB VN2550ITB WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal in- jury, 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.
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Page 2: Safety Information
VENT-FREE NATURAL GAS HEATER SAFETY INFORMATION WARNINGS IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, oper- ate, or service this heater. Im- proper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning. -
Page 3: Product Identification
PRODUCT IDENTIFICATION Thermostat Control Knob Piezo Ignitor Front Panel Figure 1 - Vent-Free Natural Gas Heater (Model VN2550ITB Shown) LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of National Fuel Gas Code ANS Z223.1, also known as NFPA 54*. -
Page 4: Air For Combustion And Ventilation
VENT-FREE NATURAL GAS HEATER AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ven- tilation air. Read the following in- structions to insure proper fresh air for this and other fuel-burning appliances in your home. - Page 5 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.
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Page 6: Ventilation Air
VENT-FREE NATURAL GAS HEATER AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must pro- vide two permanent openings: one within 12"... -
Page 7: Locating Heater
INSTALLATION NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your pri- mary heating system. Do not in- stall this heater as your primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. - Page 8 18 3/4" Screws Through Last Min. Hole On Each End Floor Model VN2550ITB 9 1/4" 16" Min. Only Insert Mounting 18 3/4" Screws Through Last Min. Hole On Each End Floor Model VN1800ITB Figure 8 - Mounting Bracket Clearances 104246...
- Page 9 INSTALLATION Continued Attaching Mounting Bracket To Wall Note: Wall anchors, mounting screws, and spacers are in hardware package. The hard- ware package is provided with heater. Attaching To Wall Stud Method For attaching mounting bracket to wall studs 1. Drill holes at marked locations using 9/64"...
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Page 10: Connecting To Gas Supply
If pipe is too small, undue loss of pres- sure will occur. Typical Inlet Pipe Diameters VN1800ITB 3/8" or greater VN2550ITB 1/2" or greater Installation must include equipment shutoff valve, union, and plugged 1/8" NPT tap. -
Page 11: Checking Gas Connections
INSTALLATION Continued CHECKING GAS CONNECTIONS WARNING: Test all gas pip- ing and connections for leaks after installing or servicing. Cor- rect all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. -
Page 12: Operating Heater
VENT-FREE NATURAL GAS HEATER OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. - Page 13 LO and HI. Note: When burners cycle on, or from LO to HI, a “click” will be heard. When the burners light, a “whoosh” noise will be heard. Control Knob VN1800ITB VN2550ITB Figure 18 - Burner Patterns 104246 OWNER’S MANUAL TO TURN OFF GAS...
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Page 14: Inspecting Burner
VENT-FREE NATURAL GAS HEATER INSPECTING BURNER Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 19 shows a correct pilot flame pat- tern. Figure 20 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. -
Page 15: Troubleshooting
TROUBLESHOOTING Note: For additional help, visit DESA International’s technical service web site at www.desatech.com. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM When ignitor button is pressed in, there is no spark at ODS/pilot When ignitor button is pressed in, there is a spark at ODS/pilot but no ignition ODS/pilot lights but flame goes out when control knob is released... - Page 16 VENT-FREE NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM Burner(s) does not light after ODS/pilot is lit Delayed ignition of burner(s) Burner backfiring during combustion Burner plaque(s) does not glow Slight smoke or odor during initial operation Heater produces a clicking/ticking noise just after burner is lit or shut off White powder residue forming within burner box or on adjacent walls or furniture...
- Page 17 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: Illustrated Parts Breakdown
® VENT-FREE NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN VN1800ITB 21-1 21-11 21-9 21-2 21-14 21-10 21-15 21-4 21-3 21-13 21-12 21-6 21-5 21-8 21-7 104246... -
Page 19: 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 22 of this manual. VN1800ITB 21-1 21-2 21-3 21-4 21-5 21-6 21-7 21-8 21-9 21-10 21-11 21-12... - Page 20 VENT-FREE NATURAL GAS HEATER ILLUSTRATED PARTS BREAKDOWN VN2550ITB 21-15 21-16 ® 21-12 21-8 21-10 21-14 21-9 21-1 21-4 21-3 21-13 21-5 21-11 21-7 21-6 21-2 104246...
- Page 21 PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 22 of this manual. VN2550ITB 104246 PART NUMBER DESCRIPTION 098304-01 Screw, #10 x 3/8" 098742-14 Front Panel 098238-07 Grill Guard 101108-01...
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Page 22: Specifications
SERVICE PUBLICATIONS You can purchase a service manual from the address listed on the back page of this manual. Send a check for $5.00 payable to DESA International. ® VN1800ITB VN2550ITB 6,600-18,000 7,000-25,500 Natural Only Natural Only Piezo Piezo 6"... - Page 23 Manually-controlled - GA3100(A,B). In- cludes ON/OFF switch. Thermostatically-controlled - GA32000T(A,B). Includes three settings: ON/OFF/AUTO. FLOOR MOUNTING STAND Models VN1800ITB - GA4000B Models VN2550ITB - GA4010B For locating heater on the floor, away from a wall. Complete installation instructions provided with floor mounting stand.
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Page 24: Warranty Information
WARRANTY INFORMATION 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. We make no other warranty, expressed or implied. VANGUARD VENT-FREE NATURAL GAS HEATERS DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable...