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Unvented Gas Log
Heater
Models: MJ27NR, MJ27PR
Installation and
Operating Instructions
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.
• 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 qualified installer, service agency or the
gas supplier.
860024
This appliance may be installed in an
MJ27 cover
a f t e r m a r k e t , p e r m a n e n t l y l o c a t e d ,
10/08
manufactured (mobile) home, where not
prohibited by local codes.
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.
This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is
installed. Provisions for adequate combustion
and ventilation air must be provided.
Refer to Page 5.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future refer-
ence.
86D0024 1/13 Rev. 7
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Table of Contents
Related Manuals for Vermont Castings MJ27NR
Summary of Contents for Vermont Castings MJ27NR
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Page 1: Operating Instructions
Unvented Gas Log Heater Models: MJ27NR, MJ27PR Installation and Operating Instructions WARNINGS If the information in this manual is not followed 860024 This appliance may be installed in an exactly, a fire or explosion may result causing MJ27 cover a f t e r m a r k e t , p e r m a n e n t l y l o c a t e d ,... -
Page 2: Table Of Contents
CONTENTS "MOJO" Series Unvented Gas Log Sets Thank you and congratulations on your purchase of an Vermont Castings Group Log Set. PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE! IMPORTANT: Read all instructions and warnings carefully before starting installation. -
Page 3: Important Safety Information
IMPORTANT SAFETY INFORMATION "MOJO" Series Unvented Gas Log Sets INSTALLER OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. • 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. -
Page 4: Codes
IMPORTANT SAFETY INFORMATION "MOJO" Series Unvented Gas Log Sets The initial break-in operation should last four hours to properly cure logs and rock wool, with the burner at Never connect unit to private (non-utility) the highest setting. Provide maximum ventilation by gas wells. -
Page 5: Product Features And Specifications
Model Fuel Control BTU/h BTU/h dealer from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you MJ27NR Nat. Millivolt 25,500 38,000 have all parts in good condition. MJ27PR Millivolt... -
Page 6: Fireplace And Hearth Dimensions
FIREPLACE and HEARTH DIMENSIONS "MOJO" Series Unvented Gas Log Sets 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. -
Page 7: Clearances And Height Requirements
CLEARANCE and HEIGHT REQUIREMENTS "MOJO" Series Unvented Gas Log Sets The dimensions shown in Figures 3 through Heat resistant material (minimum requirements) with no wooden mantel or other combustible projection: 11 and defined in the fireplace manufacturer's instructions are minimum clearances to To install the gas logs into a fireplace with no wooden maintain when installing this heater. - Page 8 CLEARANCE and HEIGHT REQUIREMENTS "MOJO" Series Unvented Gas Log Sets 12" Heat resistant material (minimum requirements) with 10" wooden mantel or other combustible projection: 8" To install the heater with a wooden mantel, shelf or other 6" combustible projection above, first measure the heat resis- Heat 1 /2 "...
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Page 9: Floor Clearance
INSTALLATION REQUIREMENTS "MOJO" Series Unvented Gas Log Sets 7" 6" Figure 8 is an example of an unsafe mantel installation. This mantel projects 4" at 8" above the opening, exceed- ing the maximum acceptable distance of 2 " The mantel also projects 7"... -
Page 10: Installation
INSTALLATION "MOJO" Series Unvented Gas Log Sets BEFORE FULLY INSTALLING THE UNIT: ASSEMBLY PROCEDURE: • Turn OFF the gas supply to the fireplace or firebox. 1. Center the gas log unit on the fireplace or firebox. Make • certain the front of the burner sits inside the front edge Seal any fresh air vents and/or ash clean-out doors of the fireplace or firebox. -
Page 11: Gas Line Installation
GAS LINE INSTALLATION "MOJO" Series Unvented Gas Log Sets CONNECT THE GAS NOTICE: A qualified gas appliance installer must connect IMPORTANT: Hold heater valve firmly with a wrench to the heater to the gas supply. Consult all local codes. prevent movement when connecting to inlet pipe. CHECk GAS TYPE: The gas supply must Use new black iron or steel pipe. -
Page 12: Check Gas Pressure
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 Test Port “OUT” side of unit. To connect from the opposite side, route the pipe around the back portion of the unit. -
Page 13: Electrical Wiring - Millivolt
ELECTRICAL WIRING - MILLIVOLT "MOJO" Series Unvented Gas Log Sets The Millivolt valve is a self-powered combination gas control Label all wires prior to disconnection when THAT DOES NOT REQUIRE 110V AC TO OPERATE. servicing controls. Wiring errors can cause improper and dangerous operation. -
Page 14: Connect Remote Receiver
ELECTRICAL WIRING - MILLIVOLT "MOJO" Series Unvented Gas Log Sets CONNECT REMOTE RECEIVER 1. Set remote receiver. Refer to instructions included in receiver kit. 2. Connect the two (2) 1/4" female connec- tors to the TP/TH and TH terminals on the control valve. -
Page 15: Log Placement
LOG PLACEMENT "MOJO" Series Unvented Gas Log Sets Before you begin — This unit is supplied with seven (7) The positioning of the logs is critical to ceramic fiber logs. Do not handle these logs with your bare the safe and clean operation of this heater. hands. - Page 16 LOG PLACEMENT "MOJO" Series Unvented Gas Log Sets Log #8 1. Place log #8 on right bracket next to valve by sliding grooves on sides of log into cutout on brackets. Figure Figure 19 LG553 Log #1 LG553 2. Place log #1 by setting the log over MJ127 log 8 the rear bracket over the two pins.
- Page 17 LOG PLACEMENT "MOJO" Series Unvented Gas Log Sets Log #4 5. Place Log #4 by matching the rectangu- lar 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.
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Page 18: Place Flickering Embers
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 26. Figure 26 LG549 Log #7 PLACE THE DECORATIVE ROCk PLACE FLICkERING EMBERS LG549 Place flickering bright embers (FBE-1G) after placing logs MLDV log #7 DO NOT sprinkle volcanic rock on the logs,... -
Page 19: Flame Appearance
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, Thermocouple periodically check the flames visually during operation. for Natural CHECk PILOT FLAME The pilot flame must always be present when the heater is in operation. -
Page 20: Operating Instructions
OPERATION "MOJO" Series Unvented Gas Log Sets OPERATING INSTRUCTIONS Avoid any drafts that alter burner flame patterns. Do The initial break-in operation should last four hours with the not allow fans to blow directly into the fireplace. Do not burner at the highest setting. Provide maximum ventilation place a blower inside the burn area of the firebox. -
Page 21: For Your Safety Read Before Lighting
OPERATING INSTRUCTIONS "MOJO" Series Unvented Gas Log Sets 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 23. -
Page 22: Millivolt Control Lighting Instructions
OPERATING INSTRUCTIONS "MOJO" Series Unvented Gas Log Sets 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 23. -
Page 23: Match Lighting Instructions
OPERATING INSTRUCTIONS / CLEANING and SERVICING "MOJO" Series Unvented Gas Log Sets MATCH LIGHTING INSTRUCTIONS 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. -
Page 24: Troubleshooting
TROUBLESHOOTING "MOJO" Series Unvented Gas Log Sets Turn off appliance and allow to cool before NOTE: All troubleshooting items are listed in order of operation. cleaning. Only a qualified service person should service and repair the heater. Problem Possible Cause Solution When ignitor button is 1. - Page 25 TROUBLESHOOTING "MOJO" Series Unvented Gas Log Sets Problem Possible Cause Solution 1. Press in control knob fully. ODS/pilot lights, but flame 1. Control knob not fully pressed in. goes out when control 2. After ODS/pilot lights, keep control knob 2. Control knob not pressed in long knob is released.
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Page 26: Replacement Parts
REPLACEMENT PARTS "MOJO" Series Unvented Gas Log Sets BURNER ASSEMBLY MJ27NR MJ27PR Item Description Qty. Natural Propane 1. Burner 86D0017 86D0018 2. Control Valve 20H2081 20H2082 3. ODS Pilot Assembly 14D0473 14D0477 0024 4. Piezo Igniter 14D0503 14D0503 MJ parts 5. -
Page 27: Logs
REPLACEMENT PARTS "MOJO" Series Unvented Gas Log Sets LOGS Item Description Qty. MJ27 1. Log #1 75D0536 2. Log #2 75D0537 3. Log #3 75D0538 4. Log #4 75D0539 5. Log #5 75D0540 6. Log #6 75D0541 7. Log #7 75D0542 8. - Page 28 "MOJO" Series Unvented Gas Log Sets 86D0024...
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Page 30: Massachusetts Residents Only
Massachusetts Residents Only — Please read and follow these special requirements "MOJO" Series Unvented Gas Log Sets 2. Approved Carbon Monoxide Detectors. Each carbon NOTE REGARDING VENTED PRODUCTS monoxide detector as required in accordance with the above This product must be installed by a licensed plumber or gas fitter provisions shall comply with NFPA 720 and be ANSI/UL 2034 when installed within the Commonwealth of Massachusetts. -
Page 31: Warranty
Vermont Castings Group in the appliance are found to be defective in materials or workmanship, Vermont Castings Group will, at its option, replace or repair the defective components at no charge to the original owner. Vermont Castings Group will also pay for reasonable labor costs incurred in replacing or repairing such components for a period of two years from the date of installation. - Page 32 Vermont Castings Group 149 Cleveland Drive • Paris, Kentucky 40361 www.vermontcastingsgroup.com...
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