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OPEN HEARTH ARCHED GAS DIRECT VENT FIREPLACE
INSTALLATION & OPERATING INSTRUCTIONS MANUAL
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
•
Open windows.
•
Do not touch electrical switches.
•
Do not try to light any appliance.
•
Extinguish any open flame.
•
Do not use the 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.
In the Commonwealth of Massachusetts:
•
Installation must be performed by a licensed plumber or
gas fitter;
•
A CO detector shall be installed in the room where the
appliance is installed.
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.
WARNING
Do NOT use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control, which has been under water.
GREENBRIAR
Model M-50
DOCUMENT NO. M50-0308
WARNING: Improper installation, adjustment, altera-
tion, service or maintenance can cause injury or prop-
erty damage. Refer to this manual. For assistance or
additional information consult a qualified installer, ser-
vice agency or the gas supplier.
FOR YOUR SAFETY
A qualified installer, service agency, or the gas suppli-
er must perform installation and service.
Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other ap-
pliance.
WARNING
Do not operate this appliance with the glass removed,
cracked or broken. A licensed or qualified person
should do replacement of glass.
WARNING
Mendota gas fireplaces are heat producing appliances.
Do not burn wood, paper or other materials in this fire-
place. This fireplace is designed as a supplement
heat source. It is advisable to have an alternative pri-
mary heat supply.
The installation must conform with local codes or, in
the absence of local codes, with the current National
Fuel Gas Code, ANSI Z223.1, or the current Natural
Gas and Propane Installation Code, CSA B149.1
CAUTION
THESE INSTRUCTIONS ARE TO REMAIN WITH
THE HOMEOWNER.
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Summary of Contents for Mendota GREENBRIAR M-50
- Page 1 A CO detector shall be installed in the room where the WARNING appliance is installed. Mendota gas fireplaces are heat producing appliances. Do not burn wood, paper or other materials in this fire- place. This fireplace is designed as a supplement heat source.
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Page 2: Table Of Contents
LP GAS PRESSURE REQUIREMENTS ..........................54 VALVE ASSEMBLY REPLACEMENT PARTS ........................57 GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT ..................... 59 MENDOTA WARRANTY QUALIFICATION & SERVICE REFERENCE FORM ..............61 MENDOTA EXTENDED LIFETIME PROTECTION AND LIMITED WARRANTY ..............67 - 2 -... -
Page 3: Safety And Warning Information
SAFETY AND WARNING INFORMATION READ and UNDERSTAND all instructions carefully before starting the appliance. FAILURE TO FOLLOW these instruc- tions may result in a possible fire hazard and will void the warranty. Any safety screen or guard removed for servicing must be replaced before operating this appliance. DO NOT USE this appliance if any part has been under water. -
Page 4: Specific Requirements For The Common Wealth Of Massachusetts
Specific Requirements for the Common Wealth of Massachusetts The information in this section applies to all installations performed in the Common Wealth of Massachusetts only. For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes and where the side wall exhaust vent termination is less than seven (7) feet above grade, the following requirements shall be satisfied: 1. - Page 5 SPECIFICATIONS MODEL M-50 High Fire - Adjustable to - Low Fire BTUH. (MODEL M-50) NAT. GAS 50,000 15,800 BTUH. (MODEL M-50) LP GAS 50,000 16,200 NOTE: LPG CONVERSION KIT, #HA-52-00145, MUST BE PURCHASED SEPARATELY TO CONVERT TO BURN LPG IN THIS FIREPLACE. MAIN ORIFICE [0-2000ft (610 m)]: REAR BURNER: #43 NAT.
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Page 6: Congratulations
Fireplace and replace any part of the control system and any gas control, which has been under water. DO NOT use this fireplace if the burner does not light immediately. Turn unit off and call Mendota ap- proved service person if there is any delay in burner light off. -
Page 7: General Appliance Specifications
GENERAL APPLIANCE SPECIFICATIONS Figure 1: General Appliance Specifications HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the Mendota technical service department for specific venting requirements and venting restrictions. 39 1 4 " MIN. 52"... -
Page 8: Mantel Clearances
MANTEL CLEARANCES Mantel Clearances for this fireplace may be measured from the top of the convection air opening or the floor level of this fireplace. The location that is referenced normally to measure mantel clearances is the Top of the Convection Air Opening. For ease, however, measure up from the floor level of this fireplace. -
Page 9: Clearances To Combustibles From Appliance Surfaces
CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES Figure 3: Clearances to Combustibles 0" CLEARANCE FROM TOP STANDOFFS 1" CLEARANCE FROM BACK 0" CLEARANCE FROM SIDES - 9 -... -
Page 10: Planning The Installation
PLANNING THE INSTALLATION When planning on appliance installation, it is necessary to determine the following information before installing: • Where the appliance is to be installed. • The vent system configuration to be used. • Gas supply piping. • Electrical Wiring. •... -
Page 11: Framing Dimensions
FRAMING DIMENSIONS Minimum Rough Framing Dimensions DIMENSION DESCRIPTION (INCHES) Width 39-1/4 Height 47-9/16” Depth 21-1/2” Vent opening height 10-3/4” Vent opening width 10-3/4” Rough Framing Dimensions The Rough Framing Dimensions must be maintained to allow this fireplace to slide into the framing cavity and to provide the required clearances to the combustible framing structure. -
Page 12: Framing Depth & Finishing Material
Framing Depth & Finishing Material The framing depth for this fireplace is 21-1/2 inches. This is a fixed depth required for all installations except a corner in- stallation. For corner installations, see figures 1 and 4. All finishing materials that surround this fireplace’s arch profile must extend out from the face surface of this fireplace. In the area defined as “NONCOMBUSTIBLE ZONE”... -
Page 13: Hearth Protection Pad Requirements
HEARTH PROTECTION PAD REQUIREMENTS Hearth Protection R Rating: MINIMUM R-1 IS REQUIRED. USE OF A ½” THICK (MINIMUM) CEMENT BOARD (Hardi- backer, Wonderboard or other brand) plus ¼” thick mortar (ThinSet type) plus ¼” thick ceramic tile exceed the R-1 re- quirement. -
Page 14: General Information
The M-50 Fireplace must be installed and serviced by a Mendota approved serviceperson. Any adjustments to burner, pilot, logs or coal bed must be made by a Mendota approved service person. Pilot system voltage must be checked with a voltmeter. -
Page 15: Gas Supply Requirements
GAS SUPPLY REQUIREMENTS Correct gas pressure and proper gas supply line sizing is imperative to Figure 9: Gas Supply the successful performance of your Mendota gas fireplace. Be sure the gas supplier or plumber carefully checks for correct gas pressure and FRONT gas line sizing when installing the fireplace. -
Page 16: Gas Pressure Requirements
GAS PRESSURE REQUIREMENTS ONE MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS APPLIANCES CAN BE IMPROPER GAS PRESSURE! Problems such as changes in flame color or configuration, gas pilot or burner outages, intermittent operation, changes in heat output, excessive burner noise, etc. are nearly always the result of changes in gas pressure or improper gas pres- sure at the time of the installation. -
Page 17: General Installation Instructions
National Fuel Gas Code. In the absence of local codes, the installation must conform to the most current edi- tion of the National Fuel Gas Code ANSI Z223.1, also known as NFPA 54. NOTE: The Mendota M-50 Fireplace is approved for mo- bile home and bedroom installations. -
Page 18: General Flue Venting Instructions
Common vent systems are prohibited. To assure proper venting performance of this high-performance Mendota Direct Vent Fireplace, it is critical that all brands of vent pipe sections are sealed tightly and leak-proof. This means that all pipe sections must be carefully rotated into the fully "twist-locked"... -
Page 19: Exterior Vent Locations And Restrictions
EXTERIOR VENT LOCATIONS AND RESTRICTIONS Figure 13: Exterior Vent ALL MEASUREMENTS FROM CENTER LINE OF VENT CAP ∨ - ∧ - ≡ - Vent Terminal Air Supply Inlet Area where terminal is not permitted Clearance above grade, veranda, porch, deck, or balco- *Not to be installed above a meter/regulator assembly ny (*12 inches (30 cm) minimum). -
Page 20: Flue Venting Components Identification
DO NOT SEPARATE TELESCOPING SECTIONS. USE TELESCOPING SECTIONS AS COMPLETE ASSEMBLIES. HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the Mendota technical service department for specific venting requirements and venting restrictions. ITEM DESCRIPTION 6" or 7” PIPE (DuraVent 6”/Amerivent 7”) 12"... -
Page 21: M50 Master Flue Venting Requirements Chart
90 elbows used. HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please con- tact the Mendota technical service de- partment for specific venting require- ments and venting restrictions. ZONE "B" V min H max 0 in. -
Page 22: Important Venting Configuration Notes
USING 90 ELBOWS IN ZONE “B” The M50 Fireplace by MENDOTA allows maximum flexibility in the use of 90 elbows in the vent system. The length of the first straight vertical section directly connected to the fireplace’s starter collar determines the maximum horizontal run and the number of 90 elbows allowed for this fireplace. -
Page 23: Approved Vent Systems
APPROVED VENT SYSTEMS QUICK REFERENCE CHART Figure 16: Vent Systems STRAIGHT UP, VERTICAL VENTING ZERO VERTICAL HORIZONTAL TERMINATION VERTICAL RISE HORIZONTAL TERMINATION 45 FEET MAXIMUM APPROVED APPROVED APPROVED VERTICAL RISE DUAL 90° ELBOWS HORIZONTAL TERMINATION VERTICAL RISE DUAL 90° ELBOWS VERTICAL TERMINATION ZERO VERTICAL DUAL 90°... -
Page 24: Zero Rise Horizontal Termination
ZERO RISE HORIZONTAL TERMINATION The M-50 Fireplace must be installed by a qualified Mendota approved serviceperson. A Maximum Horizontal Run allowed is 3 feet if a 90-degree elbow is connected directly to this fireplace’s flue starter col- lar. When a 90-degree elbow is connected directly to this fireplace, the hori- Figure 17 zontal centerline of the 90ºelbow will be 46-3/4”... -
Page 25: Vertical Rise Horizontal Termination
This will cause high temperatures and the possibility of a fire. This M-50 Fireplace must be installed by a qualified Mendota service person 1. Position fireplace in desired location. See Figure 13 for guidelines on proper vent cap placement on exterior of home. -
Page 26: Horizontal Termination
TWO(2) 90° ELBOWS Figure 20 WITH STARTER VERTICAL SECTION HORIZONTAL TERMINATION H1+H2 max 12" V1 min = 12" H1 min = 0 H2 min = 6" 4'-40' FOR V GREATER THAN 40', SEE FIGURE 15 ON PAGE 21 THREE (3) 90° ELBOWS Figure 21 WITH STARTER VERTICAL SECTION HORIZONTAL TERMINATION... -
Page 27: Vertical Through-The-Roof Venting
Doing so will continue to allow the use of the 51 feet maximum vertical run. The M-50 Fireplace must be installed by a qualified Mendota approved serviceperson. 1. Place the fireplace in its desired location. Drop a plum bob from the ceiling to the position of the fireplace flue exit. - Page 28 Height "*H" of top of vent cap can be determined as follows: "H" DIMENSION Figure 22 ROOF PITCH FEET METERS FLAT to 6/12 7/12 to 9/12 10/12 to 12/12 13/12 to 16/12 17/12 to 21/12 9. Complete installation with storm collar and vent cap. TWO(2) 90°...
- Page 29 THREE(3) 90° ELBOWS WITH STARTER VERTICAL SECTION Figure 23 VERTICAL TERMINATION V1 + H1 + V2 + H1 + H2 max H2 max 12" 4'-40' FOR V GREATER THAN 40', SEE FIGURE 15 ON PAGE 21. V1 min = 12" V1 + H1 + H2 + V2 (max) = 64 THREE(3) 90°...
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Page 30: Vertical Through-The-Roof Venting Using Four 90 Elbows
Mendota has spent considerable time and effort in the design of this fireplace and its venting system. Through this effort, Mendota has been able to certify the use of Four 90 elbows. -
Page 31: M-50 Door Operation
M-50 DOOR OPERATION TO REMOVE DOOR 1. Use the tool to disconnect the spring latches from the glass frame. Insert tool into hole in latch, pull towards you and up to disengage top latches, sideways to disengage side latches. There are six spring latches; two on top and two on each side. -
Page 32: To Replace Door
TO REPLACE DOOR Line up the three bottom tabs on glass frame with slots in glass clips on firebox bottom. Insert tabs into slots. Center Glass Frame over Firebox; left to right. After door has been placed into slots, rotate door towards firebox until gasket seal is touching the firebox frame. -
Page 33: M-50 Log Set Installation Instructions
M-50 LOG SET INSTALLATION INSTRUCTIONS 6. Cut the clear tapes and outer plastic wrap using a sharp utility knife or equivalent. Locate the 2 bags of coals, glow- ing embers and the log pieces. Identify each log piece numbered 1 through 7 and the Large Chunk coals (H), Small coals (I) and Glowing Embers (J) per the diagram show on this page. - Page 34 FOLLOW EACH STEP DEPICTED IN THE FOLLOWING DIAGRAMS TO INSTALL THE LOG SET. 1. Identify two ¼” diameter Pins located on the top-most shelf of the burner airbox. Identify two holes located in the base surface of Log #1. Align holes in log with pins on the top-most shelf and set the log on that shelf. 2.
- Page 35 3. Identify Log #3. Locate the hole in the base of Log #3. This hole aligns with a stud located to the left of the pilot light assembly. Set Log #3 as shown in the diagram, below, against the middle burner and adjacent to the pilot light’s Ther- mopile.
- Page 36 2. Identify Log #2 and the ¼” Pin Located on the right side between the middle and front burner legs. Log #2 has a hole in its base surface. Align this hole with the pin and set Log #2 between the middle and front burner legs as shown in the diagram, below.
- Page 37 3. Identify Log #3 and the ¼” Pin Located on the left side between the middle and front burner legs. Log #3 has a hole in its base surface. Align this hole with the pin and set Log #3 between the middle and front burner legs as shown in the dia- gram, below.
- Page 38 5. Identify the ¼” Pins located on the top surface of the Rear Burner and on the top surface of Log #2. 6. Log #4 has two holes in its base surface. Align corresponding holes and pins per diagrams in this page and set log #4 on top of Rear Burner and cross over Log #2.
- Page 39 7. Log #5 should be placed by first setting its left end behind Log #3. The small branch on Log #5 will rest against Log #3. DETAIL “A” 8. See Detail “A” in the Figure to the left. Maintain a 1” 1”...
- Page 40 9. Log #6 sits in the right corner inside the cavity created by Log #1, Log #2 and Log #4. Place the Right Bottom corner of Log #6 behind middle burner tube leg and in front of rear burner leg. The Left End of Log #6 sits on top of Log #4. The Knot on the right top of Log #6 leans against Log #1.
- Page 41 10. Log #7 Sits on top of Log #3. The position of this log is not critical. Position this log as shown in the figures, below. Small variations in its position will not affect the flame characteristics. 11. When all log pieces are placed in the proper locations, the completed log set shall look as shown, below. ADDING COALS AND GLOWING EMBERS Add Large Chunk Coals (8) in front and on top of front burner.
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Page 42: Installation Check Off List
The following Check-Off Lists must be completed prior to final operation of the Fireplace. INSTALLATION CHECK OFF LIST Co-axial vent rigid pipe, wall vent cap or roof vent cap must be installed by a Mendota approved person in accordance with instructions. All joints must be secured, "twist- locked"... -
Page 43: Lighting Instructions
LIGHTING INSTRUCTIONS IMPORTANT: Be sure all items on "INSTALLATION CHECK OFF LIST" (PG. 44) have been completed! CAUTION: If the pilot goes out, be sure to wait a minimum of five minutes before relighting - be sure to always remove the glass before relighting the pilot. - Page 44 NOTICE: Initial heater start-up will cause some NON TOXIC "off gassing" of adhesives, gasket binders, paint and other materials. Most nuisance odors will be eliminated after the first two hours of operation; however, slight amounts may be present during first 24 hours of initial operation. To eliminate all nuisance odors, continuously operate this fireplace on the HIGH setting for 6 to 8 hours.
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Page 45: Thermostat Operation And Wall Switch Kit Connections
60 seconds and repeat lighting procedure. If burner does not come on immediately after second try recheck complete installation. If necessary, contact your Mendota dealer. CAUTION: THIS CONTROL IS A MILLIVOLT SYSTEM. NO ADDITIONAL POWER SUPPLY CAN OR SHOULD BE USED. -
Page 46: Making Wire Connections To Wall Switch Kit #Aa-11-00781
Wall Switch Kits #AA-11-00873 and 874 are options and may be installed to remotely control various functions of this fire- place. Wall Switch Kits #AA-11-00873 and 874 provide the following remote functions on your Mendota Fireplace: 1. Thermostatic control of this Gas Fireplace. -
Page 47: Blower System Information
BLOWER SYSTEM INFORMATION WARNING: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Dual blowers are provided as standard equipment with this M-50 fireplace. The dual blowers have an air output rating of 210 CFM (in free air). -
Page 48: Trouble Shooting The M-50 Fireplace
If sooting continues, open air shutter on burner (see "Gas Flame Adjust- ment" below). If sooting still continues, shut off unit and call Mendota service person. NOTE: To clean glass - remove glass and wipe glass with cloth or paper towel. - Page 49 5. The rear burner air shutter must be manually adjusted after removing the glass door and loosening a screw that secures the rear burner shutter. The rear burner air shutter adjustment screw is located near the rear burner orifice. See diagram, below. 6.
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Page 50: Customer Information
(usually a thin black film on the Fireplace viewing glass or on the outside of the home around the vent cap), the unit must be immediately turned off and the local Mendota dealer promptly informed. Mendota dealers will cor- rect "sooting"... -
Page 51: Maintenance
MAINTENANCE 1. ANNUAL MAINTENANCE OF MENDOTA UNITS IS REQUIRED . The following procedures must be performed each year by a Mendota approved service person. NOTE: Any adjustments to burner, pilot or logs must be done by a qualified Mendota service person. -
Page 52: Burner Flames General Height Diagram
BURNER FLAMES GENERAL HEIGHT DIAGRAM - 52 -... -
Page 53: Natural To Lp Gas Conversion
NATURAL TO LP GAS CONVERSION Kit # HA-52-00145 for Mendota Model M-50 This conversion kit shall be installed by a qualified service agency in accordance with the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction. If the... -
Page 54: Lp Gas Pressure Requirements
LP GAS PRESSURE REQUIREMENTS Inlet and manifold gas pressure checking taps are located on gas valve. A qualified installer shall take pressure surements at these ports to verify and set the correct gas pressures during the LP Kit installation. Manifold pressure must taken “MANIFOLD PRESSURE"... - Page 55 COMBUSTION SYSTEM MILLIVOLT READING Millivolt readings must be taken by a qualified installer once the LPG conversion kit parts have been installed. These readings will establish proper thermopile millivolt generation and assure trouble-free burner operation. Read- ings must be taken with: a.) Pilot ONLY operating. b.) Main Burner operating. PILOT ONLY OPERATING - Thermostat "OFF"...
- Page 56 ATTACHING LPG CONVERSION LABELS AND HIGH ALTITUDE DERATION LABEL Two printed informational labels are included with the LPG Conversion Kit. Attach these two labels to the inner surface of the left side controls access door. If you are derating this appliance at a high altitude, also attach the High Altitude Dera- tion Label, supplied in the Owner’s Manual Packet, to this same surface.
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Page 57: Valve Assembly Replacement Parts
VALVE ASSEMBLY REPLACEMENT PARTS ITEM QTY PART# DESCRIPTION 05-02-00313 VALVE,SIT,NATURAL GAS,225F,3.5-1.3 65-07-00010 BCF,3/8 TBE X 1/8MPT COMP ELBW-AF HA-48-00021 EXTENSION,MANUAL SHUTOFF,ASM HA-51-00019 VALVE BRACKET, M50 HA-51-00017 TOP BRACKET VALVE M50 50-01-00123 SCREW,PLATED,10-32 x 1/4",RSLMS 50-04-00047 WASHER,FLAT, #10 50-01-00102 TEKS, HEX #8 X 1/2 BLK ZINC 50-04-00022 WASHER, STD 3/8"... - Page 58 Figure 43: VALVE ASSEMBLY DETAIL A SCALE 3 / 4 - 58 -...
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Page 59: Glass Frame Assembly Repair And Replacement
GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT DO NOT substitute other manufac- turer's materials or components. WARNING WARNING DO NOT operate unit with cracked, Use only authorized parts and Do not operate this appliance broken or missing glass. materials obtained from Johnson with the glass removed, cracked Gas Appliance Company when or broken. -
Page 60: Listing Label Information
LISTING LABEL INFORMATION The model information regarding your specific appliance can be found on the rating plate, which is located inside the right side controls access door. When contacting your dealer for any cleaning service or warranty service, always provide the Model Number, Serial Number and Manufactured Date. -
Page 61: Mendota Warranty Qualification & Service Reference Form
As a part of Mendota's on-going program of customer satisfaction, this Form verifies proper installation and operation. It is im- portant as a reference for future service. It insures long life and trouble-free operation of Mendota fireplaces & stoves and quali- fies the owner for Mendota's lifetime limited warranty. - Page 62 TAPE SHUT -------------------------------------------------------------------------------------------------------------------------------------------------------- POSTAGE NEEDED JOHNSON GAS APPLIANCE COMPANY 520 E AVENUE N.W. CEDAR RAPIDS, IA 52405 - 62 -...
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Page 67: Mendota Extended Lifetime Protection And Limited Warranty
The use of unauthorized components will make this warranty null and void. This warranty shall be effective only if the original purchaser of the Mendota appliance is registered with Mendota Division within thirty (30) days of the date of purchase. Such registration or the failure to register shall not be deemed to create any obligation or liability by the manufacturer and this warranty with its conditions and limitations shall be the only procedure for obtaining any rights against the manufacturer and expresses the sole obligation and respon- sibilities of the manufacturer which are offered to the original purchaser and accepted upon purchase of the appliance. - Page 68 Johnson Gas Appliance Company 520 E Avenue N.W. - Cedar Rapids, IA 52405 Mendota Hearth Division WEBPAGE: www.johnsongas.com www.mendotahearth.com...