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MHSC MJ27NR Installation And Operating Instructions Manual

Unvented gas log heater
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Download this manual See also: Installation and Operating Istructions, Installation Instructions and Operating Manual
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.
This appliance may be installed in an
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 ,
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 6.
Unvented Gas Log
Heater
Models: MJ27NR, MJ27PR
Installation and

Operating Instructions

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future refer-
ence.
860024
MJ27 cover
10/08
86D0024 8/10 Rev. 4

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Summary of Contents for MHSC MJ27NR

  • Page 1: Operating Instructions

    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.

  • Page 2: Table Of Contents

    "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.

  • 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

    "MOJO" Series Unvented Gas Log Sets IMPORTANT SAFETY INFORMATION 20. Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations above 2,000 Never connect unit to private (non-utility) feet, input ratings should be reduced 4 percent for each gas wells.

  • Page 5: Product Features And Specifications

    Carefully inspect the contents for shipping damage. If any parts are missing or damaged, immediately inform the Model Fuel Control BTU/h BTU/h dealer from whom you purchased the appliance. Do not MJ27NR Nat. Millivolt 25,500 38,000 attempt to install any part of the appliance unless you MJ27PR Millivolt...

  • Page 6: Adequate Combustion And Ventilation Air

    "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 (4.8 m per kw) of the aggregate input rating of all appli-...

  • Page 7: 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 8: Clearances And Height Requirements

    "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.
  • Page 9 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 "...

  • Page 10: Floor Clearance

    "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, exceed- ing the maximum acceptable distance of 2 " The mantel also projects 7"...

  • Page 11: 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 12: Gas Line Installation

    "MOJO" Series Unvented Gas Log Sets GAS LINE INSTALLATION CONNECT THE GAS 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.

  • Page 13: 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 14: Electrical Wiring - Millivolt

    "MOJO" Series Unvented Gas Log Sets ELECTRICAL WIRING - MILLIvOLT 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 15: 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 16: Log Placement

    "MOJO" Series Unvented Gas Log Sets LOG PLACEMENT 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.

  • Page 17: Log Placement

    "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 Figure 20 LG553 Log #1 LG553 2. Place log #1 by setting the log over MJ127 log 8 the rear bracket over the two pins.
  • Page 18 "MOJO" Series Unvented Gas Log Sets LOG PLACEMENT 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.

  • Page 19: 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 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.

  • Page 20: Andiron Installation

    ANDIRON and ROCk INSTALLATION "MOJO" Series Unvented Gas Log Sets ANDIRON INSTALLATION 2, Andirons 2, Brackets 2, 2Z\v Bolts Assembly Instructions 1. Affix bracket to andiron using 2 bolts. Figure 29 2. The andiron bracket clips over the lower horizontal grate bar. Figure 30 3.

  • Page 21: 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 22: Operating Instructions

    "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.

  • Page 23: 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 25.

  • Page 24: Millivolt Control Lighting Instructions

    "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.

  • Page 25: 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 26: Troubleshooting

    "MOJO" Series Unvented Gas Log Sets TROUBLESHOOTING 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 27 "MOJO" Series Unvented Gas Log Sets TROUBLESHOOTING 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.

  • Page 28: Replacement Parts

    "MOJO" Series Unvented Gas Log Sets REPLACEMENT PARTS 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 MJ parts 14D0503 14D0503 5.

  • Page 29: Logs

    "MOJO" Series Unvented Gas Log Sets REPLACEMENT PARTS 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 30: Massachusetts Residents Only

    "MOJO" Series Unvented Gas Log Sets Massachusetts Residents Only — Please read and follow these special requirements 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

    After installation, if any of the components manufactured by MHSC in the appliance are found to be defective in materials or workmanship, MHSC will, at its option, replace or repair the defective components at no charge to the original owner.
  • Page 32 MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.com...

This manual is also suitable for:

Mj27pr

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