VENTED DECORATIVE GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL MPF24VNA, MPF24VPA, MPF18VNA AND MPF18VPA 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.
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency or the gas supplier. WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fireplace, constructed of noncombustible material and connected to a working flue.
SAFETY INFORMATION WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. WARNING: Keep flue open when operating unit. IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate or service this log set. Improper use of this log set can cause serious injury or death from burns, fire, explosion, electrical shock and carbon monoxide poisoning.
SAFETY INFORMATION Continued Keep the appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids. Children and adults should be alerted to the hazard of high temperature and should stay away to avoid burns or clothing ignition. 1. This appliance, as supplied, 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. Do not place propane/LP supply tank(s) inside the structure.
PRODUCT IDENTIFICATION WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this appliance may result in property damage or personal injury. Ember Pod Piezo Ignitor Control Knobs Chassis Assembly Log Set Assembly Figure 1 - Product Identification UNPACKING CAUTION: Do not remove the data plates from the grate assembly. The data plates contain important warranty and safety information. 1. 1. Remove log set assembly from carton.
INSTALLATION Continued CHECK GAS TYPE Use the correct gas type (natural or propane/LP) for your unit. If your gas supply is not correct, do not instal in fireplace. Call dealer where you bought the appliance for proper type of appliance. WARNING: This appliance is equipped for (natural or propane/LP) gas. Field conversion is not permitted. INSTALLATION AND CLEARANCES Figure 2 shows technical information regarding the installation of your gas log set.
INSTALLATION Continued INSTALLING APPLIANCE WARNING: Special care is required if you are installing the unit into a sunken fireplace. You must raise the fireplace floor to allow access to gas log controls. This will insure adequate air flow and guard against sooting. Raise the fireplace floor using noncombustible material. CAUTION: Do not pick up appliance assembly by logs. This could damage unit. Only handle assembly by grate. IMPORTANT: Make sure appliance is level.
INSTALLATION Continued CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur. Installation must include an equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from log set (see Figure 7).
INSTALLATION Continued 6. Reconnect heater and equipment shutoff valve to gas supply. Check reconnected fittings for leaks. Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa) 1. Close equipment shutoff valve (see Figure 8). 2. Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air. 3.
OPERATING APPLIANCE FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: Keep flue open when operating unit. 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 with a piezo ignitor. When lightning the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas.
OPERATING APPLIANCE INSPECTING BURNERS Continued Check pilot flame pattern and burner flame patterns often. NOTICE: You must light the pilot before using the hand-held remote control unit. See Lighting Instructions on page 10. After lighting, let pilot flame burn for about one minute. Turn control knob to ON position. Adjust flame adjustment knob anywhere between HI and LO. Flip AUTO/OFF/ON switch to AUTO. Slide the selector switch to the REMOTE position (see Figure 13).
INSPECTING BURNERS Continued If burner flame pattern is incorrect, as shown in Figure 18. • turn appliance off (see To Turn Off Gas to Appliance, page 10) • see Troubleshooting, page 13 Dark Orange Flames Figure 18 - Incorrect Burner Flame Pattern CLEANING AND MAINTENANCE WARNING: Turn off the appliance and allow to cool before cleaning. CAUTION: You must keep control areas, burners and circulating air passageways of fireplace clean. Inspect these areas of fireplace before each use.
TROUBLESHOOTING WARNING: Turn off appliance 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 When ignitor button is pressed, there is no spark at ODS/pilot 1. Ignitor electrode not connected to ignitor cable 2. Ignitor cable pinched or wet 1.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS/pilot lights but flame goes out when control knob is released 1. Control knob not fully pressed in 2. Control knob not pressed in long enough 1. Press in control knob fully 3. Safety interlock system has been triggered 4. Equipment shutoff valve not fully open 5. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Dark orange flame in burner during burner combustion 1. Not enough air 2. Gas regulator defective 1. Check burner(s) for dirt and debris. If found, clean burner(s) (see Cleaning and Maintenance, page 12) 2. Replace gas regulator Slight smoke or odor during initial operation 1. Residues from manufacturing processes and log curing 1. Problem will stop after a few hours of operation Produces a whistling noise when burners are lit 1.
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. • If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating appliance where impurities in air exist may create odors.
SPECIFICATIONS This appliance has been design certified to ANSI ZZ1.60-2003 and CSA 2.26-2003 Decorative Gas Appliances for Installation in Solid Fuel Burning Fireplaces by OMNI Test Laboratories. MPF18VNA Btu (Variable) 36,000/53,000 Type Gas Natural Gas Only Ignition Piezo Manifold Pressure 3.5" W.C. Inlet Gas Pressure (in. of water) Maximum 10.5" W.C. Minimum* 5.0" W.C. MPF18VPA 35,000/45,000 Propane/LP Only Piezo 10" W.C. MPF24VNA 36,000/53,000 Natural Gas Only Piezo 3.5" W.C.
ILLUSTRATED PARTS BREAKDOWN MPF24VNA, MPF24VPA, MPF18VNA, MPF18VPA 17 16 15 7 1 9 8 6 13 5 10 3 4 18 14 12 2 11 www.desatech.
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 12 of this manual. KEY NO.
WARRANTY INFORMATION KEEP THIS WARRANTY 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.