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UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
18" AND 24" VARIAbLE MANUALLy-CONTROLLED
MODELS H18Nb, H18Pb, H24Nb AND H24Pb
Also Design-Certified as Vented Decorative Appliance
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 quali-
fied installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
PFS
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Summary of Contents for Desa H18NB
- Page 1 OWNER’S OPERATION AND INSTALLATION MANUAL ® 18" AND 24" VARIAbLE MANUALLy-CONTROLLED MODELS H18Nb, H18Pb, H24Nb AND H24Pb Also Design-Certified as Vented Decorative Appliance 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.
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Page 2: Table Of Contents
TAbLE OF CONTENTS Safety ..............2 Troubleshooting ..........21 Product Identification ........... 4 Specifications ............ 25 Local Codes............5 Technical Service..........25 Unpacking............5 Service Hints ............. 25 Product Features ..........5 Replacement Parts ..........25 Air For Combustion and Ventilation ..... 5 Parts .............. - Page 3 SAFETy Continued WARNING: This product con- WARNING: Do not allow fans tains and/or generates chemicals to blow directly into the fireplace. known to the State of California Avoid any drafts that alter burner to cause cancer or birth defects flame patterns. Ceiling fans can or other reproductive harm.
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Page 4: Product Identification
SAFETy Continued 2. Do not place propane/LP supply tank(s) 11. Before using furniture polish, wax, carpet cleaner or similar products, turn heater off. If inside any structure. Locate propane/LP heated, the vapors from these products may supply tank(s) outdoors (propane/LP create a white powder residue within burner units only). -
Page 5: Local Codes
3. Check heater for any shipping damage. If information. heater is damaged call DESA Heating, LLC at 1-866-672-6040 for replacement parts 1. Remove log and heater base assembly before returning to dealer. - Page 6 AIR FOR COMbUSTION AND VENTILATION Continued Exhaust fans, fireplaces, clothes dryers and 1,000 Btu per hour (4.8 m per kw) of the ag- gregate input rating of all appliances installed fuel burning appliances draw air from the in that space and an unconfined space as a house to operate.
- Page 7 AIR FOR COMbUSTION AND VENTILATION Continued Example: ceiling and one within 12" of the floor on the 40,000 wall connecting the two spaces (see options Gas water heater _________ Btu/Hr 1 and 2, Figure 2). You can also remove door 31,500 Vent-free fireplace + _________ Btu/Hr...
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Page 8: Installation
INSTALLATION NOTICE: This heater is intended WARNING: Never install the for use as supplemental heat. heater Use this heater along with your • in a bedroom or bathroom un- primary heating system. Do not less installed as a vented appli- install this heater as your pri- ance (see page 11) mary heat source. - Page 9 INSTALLATION Continued INSTALLATION AND CLEARANCES NOTICE: Manual control heaters (Vent-Free Operation Only) may be used as a vented product. If so, you must always run heater WARNING: Maintain the with chimney flue damper open. If minimum clearances. If you can, running heater with damper open, provide greater clearances from noncombustible material above fire-...
- Page 10 INSTALLATION Continued IMPORTANT: If you cannot meet these mini- MANTEL CLEARANCES mum clearances, you must operate heater In addition to meeting noncombustible mate- with chimney flue damper open. Go to Install- rial clearances, you must also meet required ing Damper Clamp Accessory for Vented clearances between fireplace opening and Operation, page 11.
- Page 11 INSTALLATION Continued FLOOR CLEARANCES If reasons number 1 or 2 apply to you, you must permanently open chimney flue damper. A. If installing appliance on floor level, you You must install the damper clamp accessory must maintain the minimum distance of (to order, see Accessories, page 28).
- Page 12 INSTALLATION Continued INSTALLING HEATER BASE gas hose to gas regulator of heater (see Figure 10). ASSEMBLY IMPORTANT: Hold gas regulator with CAUTION: Do not remove the wrench when connecting flexible gas hose. data plates attached to the heater 2. Locate masonry screws in hardware package.
- Page 13 INSTALLATION Continued CONNECTING TO GAS SUPPLY reduce incoming gas pressure to between 11" and 14" of water. If you do not reduce incoming WARNING: This appliance gas pressure, heater regulator damage could occur. Install external regulator with vent point- requires a 1/2" NPT (National ing down as shown in Figure 12.
- Page 14 INSTALLATION Continued We recommend that you install sediment CAUTION: For propane/LP trap in supply line as shown in Figure 13. Locate sediment trap where it is within reach units, make sure external regula- for cleaning. Install in piping system between tor has been installed between fuel supply and heater.
- Page 15 INSTALLATION Continued 3. Check all joints from gas meter (natural INSTALLING LOGS gas) or propane/LP supply to equipment WARNING: Failure to position shutoff valve (see Figure 15 or 16). Apply a commercial leak detection solution to all the parts in accordance with these joints.
- Page 16 INSTALLATION Continued 3. Place rear log on heater base behind the Center metal burner. The bottom of the rear log Crossover has recess areas on the left and right side for the base to set into. Pull the rear log forward until it touches the front log (see Figure 17, page 15).
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Page 17: Operation
OPERATION LIGHTING FOR YOUR SAFETY INSTRUCTIONS READ BEFORE LIGHTING WARNING: WARNING: If you do not fol- • If fireplace has glass doors, low these instructions exactly, never operate this heater with a fire or explosion may result glass doors closed. If you op- causing property damage, per- erate heater with doors closed, sonal injury or loss of life. - Page 18 OPERATION Continued 1. STOP! Read the safety information in WARNING: Do not operate column 1. 2. Make sure equipment shutoff valve is fully heater between PILOT and HIGH open. positions. 3. Press in and turn control knob clockwise to the OFF position. 9.
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Page 19: Inspecting Burners
INSPECTING bURNERS Check pilot flame pattern and burner flame Thermocouple patterns often. Pilot Burner PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern. Figure 24 shows an incorrect pilot flame pat- tern. The incorrect pilot flame is not touching the thermocouple. - Page 20 CLEANING AND MAINTENANCE Continued We also recommend that you keep the burner 5. Blow air into the primary air holes on the tube and pilot assembly clean and free of dust injector holder. and dirt. To clean these parts we recommend 6.
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Page 21: Troubleshooting
TROUbLESHOOTING WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle or similar object to clean ODS/pilot. This can damage ODS/pilot unit. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY... - Page 22 TROUbLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS/pilot lights but flame 1. Control knob not fully 1. Press in control knob fully goes out when control knob pressed in is released 2. Control knob not pressed in 2. After ODS/pilot lights, keep long enough control knob pressed in 30 seconds...
- Page 23 TROUbLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Slight smoke or odor during 1. Not enough air 1. Check burner for dirt and initial operation debris. If found, clean burner (see Cleaning and Maintenance, page 19) 2. Gas regulator defective 2. Replace gas regulator 3.
- Page 24 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. Fol- low the gas supplier’s instructions.
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Page 25: Specifications
Parts Central call DESA Heating, LLC at 1-866-672-6040. (see page 28) or call DESA Heating, LLC at When calling DESA Heating, LLC, have 1-866-672-6040 for referral information. A list ready: of authorized dealers can be found by visiting www.deaint.com. -
Page 26: Parts
PARTS VARIABLE MANUALLY-CONTROLLED H18NB, H18PB, H24NB AND H24PB 17-3 17-4 (18" Models) 17-2 17-4 (24" Models) 17-5 17-1 www.desatech.com 124465-01A... - Page 27 PARTS This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 25 of this manual. PART NO. DESCRIPTION QTY. 120804-01PP Log Base • • • • 120783-01 Cast Iron Grate •...
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Page 28: Accessories
If they can not supply these COVER - CDABK accessories, either contact your nearest For all models. An attractive way to cover Parts Central or call DESA Heating, LLC at control knob and piezo ignitor. 1-866-672-6040 for information. You can LAVA ROCK - GA6060 also write to the address listed on the back page of this manual. - Page 29 NOTES _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 124465-01A www.desatech.com...
- Page 30 NOTES _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ www.desatech.com 124465-01A...
- Page 31 NOTES _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ _____________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 124465-01A www.desatech.com...
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Page 32: Warranty
This is DESA Heating, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty excludes any and all other warranties, express or implied, written or verbal and limits the duration of any and all implied warranties, including warranties of merchantability and fitness for a particular purpose to one (1) year on new products and 30 days on factory reconditioned products from the date of first purchase.