VENT-FREE GAS STOVE OWNER’S OPERATION AND INSTALLATION MANUAL MODEL QNSD250T 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 v icinity 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.
TABLE OF CONTENTS Safety......................................................... 3 Specifications............................................. 4 Qualified Installing Agency......................... 5 Product Features........................................ 5 Local Codes............................................... 5 Product Identification.................................. 6 Unpacking.................................................. 6 Water Vapor: A By-Product Of Unvented Room Heaters....................
SAFETY WARNING: Do not attempt to access or change the setting of the fuel selection means. Access to and adjustment of the fuel selection means must only be performed by a qualified service person when connecting this appliance to a specified fuel supply at the time of installation. Change of the selector setting to other than the fuel type specified at the time of the installation could damage this appliance and render it inoperable.
SAFETY WARNING: Do not place clothing or other flammable material on or near the appliance. Never place any objects in the heater. WARNING: The heater becomes very hot when running. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Heater will remain hot for a time after shutdown. Allow surfaces to cool before touching. WARNING: Carefully supervise young children when they are in the room with the heater. WARNING: You must operate this heater with screen in place. 1.
SPECIFICATIONS Model Gas Type QNSD250T Natural Gas Propane Gas Maximum Input Rating 25,000 Btu/Hr Minimum Input Rating 13,000 Btu/Hr 21,000 Btu/Hr Electronic Piezo Electronic Piezo Ignition Regulator Pressure Setting Inlet Gas Pressure* (inches of water) (*for purposes of input adjustment) 25,000 Btu/Hr 4" W.C. 9" W.C. Maximum 9.5" Maximum 14" Minimum 5" Minimum 11" Heater Dimensions (HxWxD) • 25" × 33.5" × 13" Carton Dimensions (HxWxD) • 24.8" × 34.25" × 13" Stove Weight • 49.
LOCAL CODES Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code, ANSI Z223.1/NFPA 54*. *Available from: American National Standards Institute, Inc. 25 West 43rd Street New York, NY 10036 National Fire Protection Association, Inc. 1 Batterymarch Park Quincy, MA 02269-9101 This heater is designed for vent-free operation. State and local codes in some areas prohibit the use of vent-free heaters.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS Water vapor is a by-product of gas combustion. An unvented room heater produces approximately one (1) ounce (30 mL) of water for every 1,000 BTUs (0.3 KWs) of gas input per hour. Unvented room heaters are recommended as supplemental heat (a room) rather than a primary heat source (an entire house). In most supplemental heat applications, the water vapor does not create a problem.
AIR FOR COMBUSTION AND VENTILATION 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" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 4). Follow the National Fuel Gas Code, ANSI Z223.
INSTALLATION CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may cause walls to discolor. IMPORTANT: Vent-free heaters add moisture to the air.
INSTALLATION GAS SELECTION This appliance is factory preset for propane gas. No changes are required for connecting to propane. Only a qualified installer or service technician can perform gas selection and connecting to gas supply. Yellow Natural Gas Plunger Underneath Metal Cap Blue Propane Gas Plunger DO NOT REMOVE! CAUTION: Two gas line installations at the same time are prohibited.
INSTALLATION FOR NATURAL GAS (NG) INSTALLATION: YELLOW 1. Remove the metal cap installed over the NG regulator inlet. Metal Cap 2. Install metal cap over propane regulator inlet. This will keep debris out of regulator. DO NOT REMOVE Metal Cap Yellow Natural Gas Plunger Install Gas Fitting Here Use only the cap supplied on the regulator. Do not use an off the shelf pipe plug. This can damage the plunger. The supplied regulator cap is designed so it will not engage the unused gas type.
INSTALLATION CONNECTING TO GAS SUPPLY WARNING: A qualified service technician must connect heater to gas supply. Follow all local codes. WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator. WARNING: For natural gas, Never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas. CAUTION: For propane gas, never connect heater directly to the gas supply. This heater requires an external regulator (not supplied).
INSTALLATION Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves. For propane installations, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11" and 14" of w.c. If you do not reduce incoming gas pressure, heater regulator damage could occur.
INSTALLATION CHECKING GAS CONNECTIONS WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detection fluid to all joints. If bubbles form, there is a leak. Correct all leaks at once. WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once. PRESSURE TESTING GAS SUPPLY PIPING SYSTEM Test Pressures In Excess Of 1/2 PSIG (3.5 kPa) 1.
INSTALLATION PRESSURE TESTING HEATER GAS CONNECTIONS 1. Open equipment shutoff valve (see Figure 14, page 14). Apply a noncorrosive leak 12, page 14). detection fluid to all joints. Bubbles forming show a leak. 2. Open main gas valve located on or near gas meter for natural gas or open propane 5. Correct all leaks at once. supply tank valve. 6. Light heater (see Lighting Instructions on 3. Make sure control knob of heater is in the page 17). Check all other internal joints OFF position. for leaks. 4.
INSTALLATION INSTALLING LOGS WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. CAUTION: After installation, and periodically thereafter, check to ensure that no flame comes in contact with any log. With the heater set to high, check to see if flames contact any log. If so, reposition logs according to the log installation instructions in this manual.
OPERATION FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
OPERATION Note: If pilot does not stay lit, refer to Troubleshooting, page 22. Also contact a qualified service technician or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure. 7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Note: If pilot goes out, repeat steps 3 through 7. This heater has a safety interlock system. Wait one (1) minute before lighting pilot again. 8.
INSPECTING BURNERS IMPORTANT: Owner’s should check pilot flame pattern and burner flame pattern often. Incorrect flame patterns indicate the need for cleaning (see Care and Maintenance, page 20 or service. WARNING: Only a qualified service person should service and repair heater. This includes maintenance requiring replacement or alteration of components. PILOT FLAME PATTERN Figure 19 shows a correct pilot flame pattern. Figure 20 shows an incorrect pilot flame pattern.
CARE AND MAINTENANCE WARNING: Turn off heater and let cool before servicing. CAUTION: You must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualified service technician. Heater may need more frequent cleaning due to excessive lint from carpeting, bedding material, pet hair, etc. WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.
CARE AND MAINTENANCE ODS/PILOT Use a vacuum cleaner, pressurized air, or a small, soft bristled brush to clean. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet hole about 2" from where the pilot flame comes out of the pilot assembly (see Figure 24). With the unit off, lightly blow air through the air inlet hole. You may blow through a drinking straw if compressed air is not available.
TROUBLESHOOTING 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. • If you cannot reach your gas supplier, call the fire department. WARNING: Only a qualified service technician should service and repair heater. Make sure that power is turned off before proceeding.
TROUBLESHOOTING Problem Possible Cause Corrective Action When ignitor button is 1. Low battery. 1. Replace battery. pressed in, there is no 2. Ignitor electrode is not con- 2. Reattach ignitor cable spark at ODS/pilot nected to ignitor cable. 3. Ignitor cable is pinched or 3. Free ignitor cable if pinched wet. by any metal or tubing. Keep ignitor cable dry. 4. Ignitor electrode is posi- 4. Replace electrode. tioned wrong. Ignitor electrode is broken. 5 Broken ignitor cable. 5. Replace ignitor cable. 6.
TROUBLESHOOTING Problem Possible Cause Corrective Action Burner(s) does not light 1. Burner orifice is clogged. after ODS/pilot is lit 1. Clean burner orifice (see Care and Maintenance, page 20). 2. Inlet gas pressure is too low. 2. Contact local gas supplier. 3. Burner orifice diameter is too 3. Replace gas train. small. Delayed ignition of 1. Manifold pressure is too low. 1. Contact local gas supplier. burner(s). 2. Burner orifice is clogged. 2. Clean burner (see Care and Maintenance, page 20).
TROUBLESHOOTING Problem Possible Cause Corrective Action Heater produces a click- 1. Metal is expanding while 1. This is common with most ing/ticking noise just after heating or contracting while heaters. If noise is excesburner is lit or shut off. cooling. sive, contact qualified service technician. White powder residue 1. When heated, the vapors 1. Turn heater off when using forming within burner from furniture polish, wax, furniture polish, wax, carpet box or on adjacent walls carpet cleaners, etc.
PARTS MODEL QNSD250T 1 2 3 4 5 9 6 8 7 26 www.usaprocom.
PARTS MODEL QNSD250T This list contains replaceable parts for your heater. When ordering replacement parts, follow the instructions listed under Replacement Parts of this manual.
WARRANTY KEEP THIS WARRANTY Model ________________________________ Serial No. _____________________________ Date Purchased ________________________ Keep receipt for warranty verification. REGISTER YOUR PRODUCT AT WWW.USAPROCOM.COM IMPORTANT: We urge you to register your product within 10 days of date of installation, complete with entire serial number which can be found on the rating plate. Please fill out the warranty information above for your personal records. Retain this manual for future reference.
