Page 2 - CONTENTS; SECTION; SAFETY; DANGER; Carbon monoxide poisoning may lead to death!; Early signs of carbon monoxide poisoning; Natural Gas; WARNINGS; Safety Information continues on next page
2 101822 CONTENTS SECTION PAGE Safety Information ......................................................................... 2 Product Identification .................................................................... 4 Local Codes .......................................................................
Page 3 - Continued
3 101822 SAFETY INFORMATION Continued WARNING ICON G 001 WARNINGS Continued WARNING: Any change to this heater or its controls can be dangerous. 1. 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. 2. If you...
Page 4 - Control Knob; Safety Device; dealer where you bought heater.; Burners
4 101822 PRODUCT IDENTIFICATION LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of localcodes, use the latest edition of National Fuel Gas Code ANSI Z223.1, also knownas NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York...
Page 5 - WARNING; PRODUCING ADEQUATE VENTILATION; Unusually Tight Construction; and; Unconfined Space
5 101822 FRESH AIR FOR COMBUSTION AND VENTILATION WARNING ICON G 001 WARNING This heater must have fresh air for proper operation. If not, poorfuel combustion could result. Read the following instructions toinsure proper fresh air for this and other fuel-burning appliancesin your home. Today’s homes...
Page 6 - Determining if You Have a Confined or Unconfined Space
6 101822 FRESH 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...
Page 7 - VENTILATION AIR; Ventilation Air From Inside Building; Figure 2 - Ventilation Air from Inside Building
7 101822 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Or Remove Door into Adjoining Room, Option 3 Ventilation Grills Into Adjoining Room, Option 2 12" 12" Ventilation Grills into Adjoining Room, Option 1 WARNING ICON G 001 WARNING If the area in which the heater may be operated is sma...
Page 8 - Figure 3 - Ventilation Air from Outdoors; Ventilation Air From Outdoors
8 101822 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Figure 3 - Ventilation Air from Outdoors 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 f...
Page 9 - NOTICE; CHECK GAS TYPE; This heater is designed to be mounted on a wall.; Never install the heater; If you install the heater in a home garage; CAUTION
9 101822 INSTALLING TO WALL NOTICE 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. Calldealer where you bought heater for proper type heater. INSTALLATION ITEMS Before installing he...
Page 10 - Figure 5 - Attaching Thermostat Sensing Bulb; For convenience and efficiency, install heater; Clamp; THERMOSTAT SENSING BULB; Locating Thermostat Sensing Bulb; Attach thermostat sensing bulb to the back of heater for proper; Attaching Thermostat Sensing Bulb; opening in bottom of heater.; Figure 4 - Mounting Clearances As Viewed From Front of Heater; INSTALLING
10 101822 Figure 5 - Attaching Thermostat Sensing Bulb 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. Ifplanning to use fan, locat...
Page 11 - 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; INSTALLING HEATER TO WALL; Mounting Bracket; Figure 7 - Removing Front Panel Of Heater; Removing Front Panel Of Heater; Figure 6 - Mounting Bracket Location
11 101822 Methods For Attaching Mounting Bracket To Wall Only use last hole on each end of mounting bracket to attach bracket to wall. Thesetwo holes are 16 inches apart from their centers. Attach mounting bracket to wall inone of two ways. 1. Attaching to wall stud2. Attaching to wall anchor Attach...
Page 12 - Marking Screw Locations; Figure 8 - Mounting Bracket Clearances; screws through these holes only.; Attaching Mounting Bracket To Wall; hardware package is provided with heater.; Attaching to wall stud method; holes drilled in wall.; Attaching to wall anchor method; Fold wall anchor as shown in Figure 9.; Figure 9 - Folding Anchor
12 101822 Marking Screw Locations 1. Tape mounting bracket to wall where heater will be located. Make sure mounting bracket is level. Models VN3000D and VN2550ITA Models VN1800D and VN1800ITA Figure 8 - Mounting Bracket Clearances 2. Mark screw locations on wall (see Figure 8). Note: Only mark last ...
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; Horizontal Slots; Figure 12 - Installing Bottom Mounting Screws
13 101822 4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT: Do not hammer key! 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. Place mounting ...
Page 14 - Typical Pipe Diameters
14 101822 CONNECTING TO GAS SUPPLY NOTICE A qualified service person must connect heater to gas supply.Follow all local codes. Typical Pipe Diameters VN1800D or VN1800ITA 3/8" or greaterVN3000D or VN2550ITA 1/2" or greater Installation must include a manual shutoff valve, union, and plugged ...
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.
15 101822 IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Tee Joint ReducerBushing to1/8" NPT 1/8" NPTPlug Tap Test Gauge Connection * Sediment Trap Tee Joint Pipe Nipple Cap ManualShutoffValve * 1/2" NPTPipe Nipple HeaterCabinet Figure 13...
Page 16 - Figure 14 - Manual Shutoff Valve; Open; Figure 15 - Checking Gas Joints; Gas Meter; 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.; CHECKING
16 101822 ON POSITION OFF POSITION Figure 14 - Manual Shutoff Valve ManualShutoffValve Open Closed Figure 15 - Checking Gas Joints ManualShutoffValve Gas Meter Control Valve Location 4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles formin...
Page 17 - FOR YOUR SAFETY READ BEFORE LIGHTING; the pilot, follow these instructions exactly.
17 101822 OPERATING HEATER Models VN1800ITA and VN2550ITA FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 WARNING If you do not follow these instructions exactly, a fire orexplosion may result causing property damage, personalinjury or loss of life. A. This appliance has a pilot which must b...
Page 18 - LIGHTING INSTRUCTIONS; OPERATING; Plaque Control Knob; Figure 16 - Thermostat Control Knob In The OFF Position
18 101822 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 Clockwise to the OFF position. OPERATING HEATER Models VN1800ITA and VN2550ITA Continued IGNIT...
Page 19 - TO SELECT HEATING LEVEL; Control; Figure 18 - Burner Patterns; Pilot Burner
19 101822 1. Slightly press in plaque control knob on right side of heater and turn counterclockwise C-clockwise to the desired position. IMPORTANT: Release downward pressure while turning control knob. Control knob will lock at the desired position. 2. Turn thermostat control knob on left side of h...
Page 20 - TO TURN OFF GAS TO APPLIANCE; Shutting Off Heater; to the OFF position.; to the PILOT position.; THERMOSTAT OPERATION; Follow steps 1 through 5 under Lighting Instructions, page 18.
20 101822 TO TURN OFF GAS TO APPLIANCE OPERATING HEATER Models VN1800ITA and VN2550ITA Continued Shutting Off Heater 1. Turn thermostat control knob clockwise Clockwise to the OFF position. 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot...
Page 21 - Figure 19 - Control Knob In The OFF Position
21 101822 HIGH OFF LOW MED PILOT IGN IGNITOR OPERATING HEATER Models VN1800D and VN3000D FOR YOUR SAFETY READ BEFORE LIGHTING LIGHTING INSTRUCTIONS 1. STOP! Read the safety information above. 2. Make sure manual shutoff valve is fully open. 3. Turn control knob clockwise Clockwise to the OFF positio...
Page 23 - Slightly press in control knob and turn counterclockwise
23 101822 TO SELECT HEATING LEVEL Figure 21 - Burner Patterns 1. Slightly press in control knob and turn counterclockwise C-clockwise to the LOW, MEDIUM, or HIGH positions. IMPORTANT: Release downward pressure while turning control knob. Control knob will lock at the desired position. OPERATING HEAT...
Page 24 - INSPECTING; Check pilot flame pattern and burner flame pattern often.; PILOT FLAME PATTERN; MANUAL LIGHTING PROCEDURE; Figure 22 - Correct Pilot Flame Pattern; Thermocouple; Figure 23 - Incorrect Pilot Flame Pattern; If pilot flame pattern is incorrect, as shown in Figure 23
24 101822 TO TURN OFF GAS TO APPLIANCE INSPECTING BURNER Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 22 shows a correct pilot flame pattern. Figure 23 shows an incorrect pilotflame pattern. The incorrect pilot flame is not touching the thermocouple. This will...
Page 25 - BURNER FLAME PATTERN; If burner flame pattern is incorrect, as shown in Figure 25; Figure 24 - Correct Burner Flame Pattern; Figure 25 - Incorrect Burner Flame Pattern
25 101822 BURNER FLAME PATTERN Figure 24 shows a correct burner flame pattern. Figure 25 shows an incorrectburner flame pattern. If burner flame pattern is incorrect, as shown in Figure 25 • turn heater off (see To Turn Off Gas to Appliance, page 20 [models VN1800ITA and VN2550ITA] or page 24 [model...
Page 26 - ODS/PILOT AND BURNER ORIFICE; Air Passageways; • Use a vacuum cleaner or pressurized air to clean.; Exterior; cabinet to remove dust.; SHOOTING; Ignitor cable pinched or; REMEDY; Free ignitor cable if; Turn off heater and let cool before cleaning.
26 101822 CLEANING AND MAINTENANCE ODS/PILOT AND BURNER ORIFICE • Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean. CABINET Air Passageways • Use a vacuum cleaner or pressurized air to clean. Exterior • Use a soft cloth dampened with a mild soap and water mixture. Wipe t...
Page 29 - If you smell gas; TANT
29 101822 WARNING ICON G 001 WARNING TROUBLE- SHOOTING Continued 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 suppli...
Page 30 - SPECIFICATIONS; Note; When gas pressure is too low
30 101822 TECHNICAL SERVICE You may have further questions about installation, operation, or troubleshooting.If so, contact DESA International’s Technical Service Department at 1-800-323-5190. VN1800ITA VN2550ITA Btu (Variable) 6,600-18,000 7,000-25,500 Type Gas Natural Only Natural Only Ignition Pi...
Page 31 - for parts replaced under warranty.; Parts Under Warranty; Usually, we will ask you to return the defective part to the factory.; Parts Not Under Warranty; ACCESSORIES
31 101822 FAN KITS - GA3100A and GA3200TA For all models. Provides better heat distribution.Makes heater more efficient. Complete installationand operating instructions included.Manually controlled - GA3100A. Includes ON/OFFswitch.Thermostatically controlled - GA32000TA. Includesthree settings: ON/O...
Page 32 - HEATER EXPLODED VIEW
32 101822 1 2 3 11 6 4 8 5 6 7 12 23 9 10 24 14 17 16 21 18 22 20 19 15 13 ILLUSTRATED PARTS BREAKDOWN Model VN1800ITA HEATER EXPLODED VIEW 23-19 23-18 ODS/PILOT ASSEMBLY A B C 23-1 23-2 23-3 23-4 23-5 23-7 23-6 23-8 23-12 23-16 23-11 23-15 23-10 23-17 23-14 23-13 23-9 BURNER ASSEMBLY
Page 33 - PARTS LIST
33 101822 PARTS LIST Model VN1800ITA This list contains replaceable parts used in your heater. When ordering parts, followthe instructions listed under Replacement Parts on page 31 of this manual. KEY PART NO. NUMBER DESCRIPTION QTY. 1 098304-01 Screw, #10 x 3/8" 2 2 098742-13 Front Panel 1 3 09...
Page 34 - ILLUSTRATED; BURNER ASSEMBLY
34 101822 HEATER EXPLODED VIEW 1 2 3 11 6 4 8 5 6 7 12 23 9 10 24 14 17 16 21 18 22 20 19 15 13 ILLUSTRATED PARTS BREAKDOWN Model VN2550ITA D C 23-1 23-2 23-3 23-8 23-16 23-17 23-11 B A 23-12 23-5 23-6 23-4 23-9 23-7 23-13 23-20 23-10 23-14 23-15 23-19 23-18 ODS/PILOT BURNER ASSEMBLY
Page 40 - KEEP THIS WARRANTY; WARRANTY INFORMATION; Model; LIMITED WARRANTY; For information about this warranty write:
KEEP THIS WARRANTY WARRANTY INFORMATION 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 ourstandard written warranty. We make no other warranty, expressed or im...