Unvented Gas Log Heater Models: MJ27NR, MJ27PR WARNINGS 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.
"MOJO" Series Unvented Gas Log Sets CONTENTS Thank you and congratulations on your purchase of an MHSC Log Set. PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE! IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. Important Safety Information...................................... 3 Codes....................................................
IMPORTANT SAFETY INFORMATION "MOJO" Series Unvented Gas Log Sets OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. WARNING INSTALLER • Any change to this heater or its controls can be dangerous. • Improper installation or use of the heater can cause serious injury or death from fire, burns, explosion or carbon monoxide poisoning. • Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns.
"MOJO" Series Unvented Gas Log Sets WARNING 20. Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations above 2,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above sea level. Refer to the National Fuel Gas Code. 21. The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). 22.
"MOJO" Series Unvented Gas Log Sets PRODUCT FEATURES & SPECIFICATIONS GAS pressures Inlet Minimum Inlet Maximum Pilot Regulator Regulator Pressure *Natural **Propane (LP) 5.0” w.c. 11.0” w.c. 10.5” w.c. 13.0” w.c. 3.5" w.c. n/a 4.0” w.c. 10.0” w.c. *NOTE: An external regulator is required to reduce supply pressure to a maximum of 10Z\x" W.C. on natural gas systems operating at higher pressure. **NOTE: An external regulator is required to reduce supply pressure to a maximum of 13” w.c.
"MOJO" Series Unvented Gas Log Sets ADEQUATE COMBUSTION and VENTILATION AIR ADEQUATE COMBUSTION AND VENTILATION AIR This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. The National Fuel Gas Code, (ANSI Z223.1/NFPA 54), defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.
"MOJO" Series Unvented Gas Log Sets WARNING FIREPLACE and HEARTH DIMENSIONS This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fireplace, vent free appliance, or in listed ventless firebox enclosure. It has been design certified for these installations. Exception: DO NOT install this appliance in a factory-built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs.
WARNING "MOJO" Series Unvented Gas Log Sets CLEARANCE and HEIGHT REQUIREMENTS The dimensions shown in Figures 4 through 12 and defined in the fireplace manufacturer's instructions are minimum clearances to maintain when installing this heater. Left and right clearances are determined when facing the front of the heater. When heater is installed into a ventless firebox, minimum clearances, as specified by the ventless firebox manufacturer, must be met.
CLEARANCE and HEIGHT REQUIREMENTS "MOJO" Series Unvented Gas Log Sets Heat resistant material (minimum requirements) with wooden mantel or other combustible projection: 12" 10" 8" 6" To install the heater with a wooden mantel, shelf or other combustible projection above, first measure the heat resistant material shown in Figure 6, then refer to Table B.
"MOJO" Series Unvented Gas Log Sets INSTALLATION REQUIREMENTS 7" 6" Figure 9 is an example of an unsafe mantel installation. This mantel projects 4" at 8" above the opening, exceeding the maximum acceptable distance of 21/2" The mantel also projects 7" at 141/2" above the opening, exceeding the maximum acceptable distance of 6".
INSTALLATION Before fully installing the unit: • Turn OFF the gas supply to the fireplace or firebox. • Seal any fresh air vents and/or ash clean-out doors WARNING located on the floor or wall of the fireplace. If left unsealed, drafting may cause pilot outage or sooting. Use a heat resistant sealant. Do not seal the chimney flue damper.
"MOJO" Series Unvented Gas Log Sets GAS LINE INSTALLATION CONNECT THE GAS CAUTION NOTICE: A qualified gas appliance installer must connect the heater to the gas supply. Consult all local codes. Use new black iron or steel pipe. Internally tinned copper or copper tubing can be used per National Fuel Code, section 2.6.3, providing gas meets hydrogen sulfide limits, and where permitted by local codes.
CHECK GAS PRESSURE "MOJO" Series Unvented Gas Log Sets The heater gas inlet connection is a 3/8" NPT at the valve. On all control type units, the inlet connection is on the right side of unit. To connect from the opposite side, route the pipe around the back portion of the unit. Test Port “OUT” When tightening up the joint to the valve, hold the valve securely to prevent movement.
"MOJO" Series Unvented Gas Log Sets The Millivolt valve is a self-powered combination gas control that does not require 110V ac to operate. CAUTION electrical wiring - millivolt Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
"MOJO" Series Unvented Gas Log Sets electrical wiring - millivolt Connect Remote Receiver 1. Set remote receiver. Refer to instructions included in receiver kit. 2. Connect the two (2) 1/4" female connectors to the TP/TH and TH terminals on the control valve. 3. Connect the four-pin connector from the valve motor to the four-pin connector on the receiver. 4. For further instruction refer to instruction sheet included with RCSIT Remote. NOTE: Heat reduces battery life.
"MOJO" Series Unvented Gas Log Sets LOG PLACEMENT WARNING Before you begin — This unit is supplied with seven (7) ceramic fiber logs. Do not handle these logs with your bare hands. Always wear gloves to prevent skin irritation from ceramic fibers. After handling the logs, wash your hands gently with soap and water to remove any traces of fibers. The positioning of the logs is critical to the safe and clean operation of this heater.
"MOJO" Series Unvented Gas Log Sets LOG PLACEMENT Log #8 1. Place log #8 on right bracket next to valve by sliding grooves on sides of log into cutout on brackets. Figure 20 Figure 20 LG553 Log #1 LG553 2. Place log #1 by setting the loglog over8 MJ127 the rear bracket over10/08 the two pins. Figure 21 Figure 21 LG554 Log #2 LG554 MJ127 log 1 10/08 3. Place log #2 at an angle across the burner by setting the log over the two pins located on top of the burner.
"MOJO" Series Unvented Gas Log Sets 5. Place Log #4 by matching the rectangular protrusion on the bottom of this log over the rectangular notch on log #3. Swing the log slightly to the front and set the log over the notch located on the upper surface of log #3. Figure 24 LOG PLACEMENT Log #4 Figure 24 LG546 LG546 MLDV log #4 6. Place log #5 by matching the rectangular notch on the bottom of the log with the rectangular protrusion on log #2.
LOG PLACEMENT "MOJO" Series Unvented Gas Log Sets 8. Place log #7 between the second and third right tong on the grate as shown in Figure 27. Figure 27 LG549 Log #7 LG549 MLDV log #7 PLACE FLICKERING EMBERS Place flickering bright embers (FBE-1G) after placing logs on burner. Pull apart into small strands and place on top of existing rock wool in front of and between front logs where they can be seen. Try to avoid stacking these embers on top of each other.
"MOJO" Series Unvented Gas Log Sets ANDIRON and rock installation aNDIRON INSTALLATION 2, Andirons 2, Brackets 2, 2Z\v Bolts Assembly Instructions 1. Affix bracket to andiron using 21/4 bolts. Figure 29 2. The andiron bracket clips over the lower horizontal grate bar. Figure 30 3. The left andiron goes to the left of the large knot on the front left log. The right andiron will adjust left to right to center equally in fireplace.
FLAME APPEARANCE "MOJO" Series Unvented Gas Log Sets Flames from the pilot and burner should be visually checked as soon as the heater is installed. In addition, periodically check the flames visually during operation. Check pilot flame Thermocouple for Natural The pilot flame must always be present when the heater is in operation. It should just touch the top of the thermocouple tip for natural. Figure 31 for correct pilot flame.
"MOJO" Series Unvented Gas Log Sets OPERATION OPERATING INSTRUCTIONS Avoid any drafts that alter burner flame patterns. Do not allow fans to blow directly into the fireplace. Do not place a blower inside the burn area of the firebox. Ceiling fans may create drafts that alter flame patterns. Sooting and improper burning will result. During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents.
"MOJO" Series Unvented Gas Log Sets OPERATING INSTRUCTIONS WARNING for your safety read before lighting If you do not follow these instruction exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance is equipped with a piezo ignition device which lights the pilot. If piezo is not working properly see Match Lighting Instructions, Page 25. B. BEFORE OPERATING smell all around the appliance area for gas.
"MOJO" Series Unvented Gas Log Sets OPERATING INSTRUCTIONS Millivolt CONTROL LIGHTING INSTRUCTIONS 1. STOP! Read the safety information label. 2. Make sure the manual shutoff valve is fully open. 3. This gas log set is equipped with an ignition device (piezo) which automatically lights the pilot. If piezo ignitor does not light the pilot, refer to instructions for Match Lighting Instructions, Page 25. 4. Turn gas control knob clockwise to the OFF position and turn ON/OFF switch to OFF position. 5.
OPERATING INSTRUCTIONS / Cleaning and Servicing "MOJO" Series Unvented Gas Log Sets match lightinG instructions WARNING 1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.). 2. Follow appropriate lighting instructions found previously. Instead of pushing and releasing the piezo button, light a match and hold the flame to the end of the pilot and ignite the pilot. 3.
WARNING "MOJO" Series Unvented Gas Log Sets TROUBLESHOOTING Turn off appliance and allow to cool before cleaning. Only a qualified service person should service and repair the heater. Problem When ignitor button is pressed, there is not spark at ODS/pilot. Appliance produces unwanted odors. Appliance shuts off during use. NOTE: All troubleshooting items are listed in order of operation. Possible Cause 1. Ignitor electrode positioned wrong. 2. Ignitor electrode is broken. 3.
"MOJO" Series Unvented Gas Log Sets TROUBLESHOOTING Problem Possible Cause ODS/pilot lights, but flame goes out when control knob is released. Logs appear to smoke after initial operation. 1. Control knob not fully pressed in. 2. Control knob not pressed in long enough. 3. Manual shutoff valve not fully open. 4. Thermocouple connection loose at control valve. 5. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out.
"MOJO" Series Unvented Gas Log Sets replacement parts 1 3 4 2 5 7 6 8 Burner assembly WARNING Item Description Qty. 1. Burner 1 2. Control Valve 1 3. ODS Pilot Assembly 1 4. Piezo Igniter 1 5. Piezo Wire 1 6. Pilot Regulator 1 7. Thermostatic ON/OFF 1 Flame Height Adj. 1 Remote Control 8. Injector 1 9.
"MOJO" Series Unvented Gas Log Sets replacement parts 8 LOGS WARNING Item 1. 2. 3. 4. 5. 6. 7. 8. Description Log #1 Log #2 Log #3 Log #4 Log #5 Log #6 Log #7 Log #8 Qty. 1 1 1 1 1 1 1 1 MJ27 75D0536 75D0537 75D0538 75D0539 75D0540 75D0541 75D0542 86D0019 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. REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER.
"MOJO" Series Unvented Gas Log SetsOnly — Please read and follow these special requirements Massachusetts Residents NOTE REGARDING VENTED PRODUCTS This product must be installed by a licensed plumber or gas fitter when installed within the Commonwealth of Massachusetts. Any residence with a direct vent product must have a CO detector installed in the residence.
LIMITED LIFETIME WARRANTY POLICY Lifetime Warranty The following components are warranted for life to the original owner, subject of proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners. Five Year Warranty The following components are warranted for 5 years to the original owner, subject of proof of purchase: Vent Free Ceramic Fiber Logs and Aluminized Burners.
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