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Vanguard VN1800C Owner's Operation And Installation Manual

Vent-free natural gas heater
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VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
Models: VN1800C, VN1800IT, VN3000C, and VN2550IT
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.
Save this manual for future reference.
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  • Page 1 VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL Models: VN1800C, VN1800IT, VN3000C, and VN2550IT 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.

  • Page 2: Table Of Contents

    Installing To Wall ... 9 Connecting To Gas Supply ... 14 Checking Gas Connections ... 15 Operating Heater (Models VN1800IT & VN2550IT) ... 17 Operating Heater (Models VN1800C & VN3000C) ... 21 Inspecting Burner ... 24 Cleaning And Maintenance ... 26 Troubleshooting ... 26 Technical Service ...
  • Page 3 SAFETY INFORMATION Continued 100750 WARNINGS WARNING ICON G 001 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 •...

  • Page 4: Product Identification

    PRODUCT IDENTIFICATION LOCAL CODES UNPACKING PRODUCT FEATURES Thermostat Control Knob (Models VN1800IT and VN2550IT Only) Piezo Ignitor (Models VN1800IT and VN2550IT Only) Front Panel Figure 1 - Vent-Free Natural Gas Heater (Model VN2550IT Shown) 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 ANSI Z223.1, also known as NFPA 54*.

  • Page 5: Fresh Air For Combustion And Ventilation

    FRESH AIR COMBUSTION VENTILATION 100750 WARNING ICON G 001 This heater must have fresh air for proper operation. If not, poor fuel combustion could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
  • Page 6 FRESH AIR COMBUSTION 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 7 FRESH AIR COMBUSTION VENTILATION Continued 100750 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 provide two permanent openings: one within 12" of the ceiling and one within 12"...
  • Page 8 FRESH AIR COMBUSTION VENTILATION Continued VENTILATION AIR (Continued) Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors.

  • Page 9: Installing To Wall

    INSTALLING TO WALL 100750 A qualified service person must install heater. Follow all local codes. CHECK GAS TYPE Use only natural gas. If your gas supply is not natural, do not install heater. Call dealer where you bought heater for proper type heater. INSTALLATION ITEMS Before installing heater, make sure you have the items listed below.
  • Page 10 INSTALLING TO WALL Continued For convenience and efficiency, install heater • where there is easy access for operation, inspection, and service • in coldest part of room An optional fan kit is available from your dealer. See Accessories, page 31. If planning to use fan, locate heater near an electrical outlet.
  • Page 11 INSTALLING TO WALL Continued 100750 INSTALLING HEATER TO WALL Mounting Bracket The mounting bracket is located on back panel of heater. It has been taped there for shipping. Remove mounting bracket from back panel. Figure 6 - Mounting Bracket Location Removing Front Panel Of Heater 1.
  • Page 12 3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall. WARNING G 001 9 1/4" 16" Min. Only Insert Mounting Screws Through Last Min. Hole On Each End Floor Models VN1800C and VN1800IT 18 3/4" Min. 100750...
  • Page 13 INSTALLING TO WALL Continued 100750 4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT: For thick walls (over 1/2" thick) or solid walls, do not pop open wings. Figure 10 - Popping Open Anchor Wings For Thin Walls 5.

  • Page 14: Connecting To Gas Supply

    If pipe is too small, undue loss of pressure will occur. Typical Pipe Diameters VN1800C or VN1800IT 3/8" or greater VN3000C or VN2550IT 1/2" or greater Installation must include a manual shutoff valve, union, and plugged 1/8" NPT tap.

  • Page 15: Checking Gas Connections

    CONNECTING TO GAS SUPPLY Continued CHECKING CONNECTIONS 100750 IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Pressure Regulator Regulator Bracket Heater Cabinet Tee Joint Test Reducer Bushing to Gauge 1/8" NPT Connection * 1/8" NPT Plug Tap Tee Joint Sediment...
  • Page 16 6. Light heater (see Operating Heater, pages 17 through 24). Check the rest of the internal joints for leaks. 7. Turn off heater (see To Turn Off Gas to Appliance, page 20 [models VN1800IT and VN2550IT] or page 24 [models VN1800C and VN3000C]). 8. Replace front panel. Manual...

  • Page 17: Operating Heater (Models Vn1800It & Vn2550It)

    OPERATING HEATER Models VN1800IT and VN2550IT 100750 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A.
  • Page 18 OPERATING HEATER Models VN1800IT and VN2550IT Continued LIGHTING INSTRUCTIONS 1. STOP! Read the safety information at the top of page 17. 2. Make sure manual shutoff valve is fully open. 3. Turn thermostat control knob on left side of heater clockwise OFF position.
  • Page 19 OPERATING HEATER Models VN1800IT and VN2550IT Continued 100750 Thermocouple Figure 17 - Pilot TO SELECT HEATING LEVEL WARNING ICON When running heater, set control knob at the 1, 2, 3, or 4 locked positions. Never set control knob between locked positions.

  • Page 20: To Turn Off Gas To Appliance

    OPERATING HEATER Models VN1800IT and VN2550IT Continued TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn thermostat control knob clockwise 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) 1.

  • Page 21: Operating Heater (Models Vn1800C & Vn3000C)

    OPERATING HEATER Models VN1800C and VN3000C 100750 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
  • Page 22 OPERATING HEATER Models VN1800C and VN3000C Continued 4. 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 at the top of page 21. If you don’t smell gas, go to the next step.
  • Page 23 OPERATING HEATER Models VN1800C and VN3000C Continued 100750 TO SELECT HEATING LEVEL WARNING ICON G 001 When running heater, set control knob at LOW, MEDIUM, or HIGH locked positions. Never set control knob between locked positions. Poor combustion and higher levels of carbon monoxide may result.

  • Page 24: Inspecting Burner

    If pilot flame pattern is incorrect, as shown in Figure 23 • turn heater off (see To Turn Off Gas to Appliance, page 20 [models VN1800IT and VN2550IT] or page 24 [models VN1800C and VN3000C]) • see Troubleshooting, pages 24 through 29 to the OFF position.
  • Page 25 If burner flame pattern is incorrect, as shown in Figure 25 • turn heater off (see To Turn Off Gas to Appliance, page 20 [models VN1800IT and VN2550IT] or page 24 [models VN1800C and VN3000C]) • see Troubleshooting, pages 26 through 29...

  • Page 26: Cleaning And Maintenance

    CLEANING MAINTENANCE TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. WARNING ICON G 001 Turn off heater and let cool before cleaning. WARNING ICON You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use.
  • Page 27 TROUBLE- SHOOTING Continued 100750 OBSERVED POSSIBLE PROBLEM CAUSE When control knob is 1. Gas supply turned off or pressed in and turned manual shutoff valve to the PILOT/IGN closed. position, there is spark 2. Control knob not fully at ODS/pilot but no pressed in while being ignition (non-thermo- turned to PILOT/IGN...
  • Page 28 TROUBLE- SHOOTING Continued OBSERVED POSSIBLE PROBLEM CAUSE Burner(s) does not 1. Burner orifice(s) is light after ODS/pilot is clogged. lit. 2. Burner orifice(s) diameter is too small. 3. Inlet gas pressure is too low. Delayed ignition of 1. Manifold pressure is too burner(s) low.
  • Page 29 TROUBLE- SHOOTING Continued 100750 WARNING ICON G 001 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. •...

  • Page 30: Technical Service

    TECHNICAL SERVICE SPECIFICATIONS SERVICE PUBLICATIONS SERVICE HINTS You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. VN1800IT BTU (Variable) 6,600-18,000 Type Gas Natural Only Ignition Piezo Pressure Regulator Setting 6"...

  • Page 31: Replacement Parts

    Parts Under Warranty Contact authorized dealer from whom you purchased this product. If they are unable to supply original replacement part(s), call DESA International’s Technical Service Department at 1-800-323-5190 for information. When contacting your dealer or DESA International, have ready: •...

  • Page 32: Illustrated Parts Breakdown And Parts List

    ILLUSTRATED PARTS BREAKDOWN Model VN1800IT HEATER EXPLODED VIEW 23-18 23-19 ODS/PILOT ASSEMBLY 23-15 23-10 23-11 23-17 23-16 23-9 23-13 BURNER ASSEMBLY 23-1 23-2 23-4 23-3 23-7 23-5 23-6 23-12 23-14 23-8 100750...
  • Page 33 PARTS LIST Model VN1800IT 100750 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 31 of this manual. PART NUMBER DESCRIPTION 098304-01 Screw, #10 x 3/8" 098742-13 Front Panel 098238-01 Grill Guard 098342-01...
  • Page 34 ILLUSTRATED PARTS BREAKDOWN Model VN2550IT HEATER EXPLODED VIEW 23-18 23-19 ODS/PILOT 23-15 23-9 23-4 23-11 23-5 23-17 23-10 23-12 23-13 BURNER ASSEMBLY 23-1 23-2 23-3 23-16 23-14 23-6 23-20 23-8 23-7 100750...
  • Page 35 PARTS LIST Model VN2550IT 23-1 23-2 23-3 23-4 23-5 23-6 23-7 23-8 23-9 23-10 23-11 23-12 23-13 23-14 23-15 23-16 23-17 23-18 23-19 23-20 100750 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 31 of this manual. PART NUMBER DESCRIPTION...
  • Page 36 ILLUSTRATED PARTS BREAKDOWN Model VN1800C HEATER EXPLODED VIEW 13-16 13-17 ODS/PILOT 13-10 13-11 13-4 13-12 13-15 13-13 BURNER ASSEMBLY 13-1 13-2 13-3 13-6 13-5 13-7 13-14 13-18 13-8 13-9 100750...
  • Page 37 PARTS LIST Model VN1800C 13-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 13-9 13-10 13-11 13-12 13-13 13-14 13-15 13-16 13-17 13-18 100750 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 31 of this manual.
  • Page 38 ILLUSTRATED PARTS BREAKDOWN Model VN3000C HEATER EXPLODED VIEW 13-16 13-17 ODS/PILOT 13-9 13-11 13-4 13-5 13-15 13-13 BURNER ASSEMBLY 13-1 13-2 13-3 13-12 13-7 13-6 13-14 13-18 13-8 13-10 100750...
  • Page 39 PARTS LIST Model VN3000C 13-1 13-2 13-3 13-4 13-5 13-6 13-7 13-8 13-9 13-10 13-11 13-12 13-13 13-14 13-15 13-16 13-17 13-18 100750 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 31 of this manual. PART NUMBER DESCRIPTION...

  • Page 40: Warranty Information

    VANGUARD VENT-FREE NATURAL GAS HEATERS DESA International warrants this product and any parts thereof, to be free from defects in material and workmanship for two years from the date of first purchase, provided that the product has been properly installed, operated, and maintained in accordance with all applicable instructions.

This manual is also suitable for:

Vn1800itVn2550itVn3000c

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