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MODELS EYF18
Natural Gas or Propane/LPG
Control Type: Manual or Millivolt
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. See page 7.
READ BEFORE INSTALLING. SAVE THESE INSTRUCTIONS
VENTED DECORATIVE
INSTALLATION AND OPERATING
EYF24
AND
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.
UNVENTED GAS LOG
HEATER OR
APPLIANCE
INSTRUCTIONS
WARNINGS
WARNINGS
L O
O N
H I
I
G
O F
N
F
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Summary of Contents for Monessen Hearth MHSC EYF18
- Page 1 MODELS EYF18 Natural Gas or Propane/LPG Control Type: Manual or Millivolt 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. See page 7. READ BEFORE INSTALLING.
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Page 2: Table Of Contents
CONTENTS Important Safety Information ... 3 Getting Started ... 5 Product Features and Specifications ... 6 General Installation Information ... 7 Codes ... 7 Adequate Combustion and Ventilation Air ... 7 Fireplace and Hearth Dimensions... 9 Placement in a Fireplace with a Restrictive Barrier ... -
Page 3: Important Safety Information
INSTALLER Please leave these instructions with the appliance. Read these instructions carefully before installing or trying to operate this vent-free gas heater. • 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 IMPORTANT SAFETY INFORMATION Continued from page 3 13. Avoid any drafts that alter burner flame patterns. Do not allow fans to blow directly into fireplace. Do not place a blower inside burn area of firebox. Ceiling fans may create drafts that alter burner flame patterns. Sooting and improper burning will occur.
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Page 5: What You Will Need For Installation
MAKE SURE YOU HAVE RECEIVED ALL PARTS: Check your packing list to verify that all listed parts have been received. You should have the following: • Unvented gas log burner assembly • Installation/operating instructions • Ceramic Fiber or Refractory Cement Logs The millivolt controlled version of this heater is the only style designed to be operated with optional devices for ON/OFF functions. -
Page 6: Natural Gas
PRODUCT FEATURES NATURAL GAS Manual Pressure Regulator Pressure Setting: 4.0" w.c. Gas Inlet Pressure: Max. 10 1/2" w. c. Min. 5" w.c. Model Number EYF24NM EYF24NV EYF18NM EYF18NV PROPANE/LPG Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c. Manual Pressure Regulator Pressure Setting: 10"... -
Page 7: General Installation Information
CODES Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1 or NFPA54 which can be obtained from… ADEQUATE COMBUSTION AND VENTILATION AIR This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for ad- equate combustion and ventilation air. - Page 8 GENERAL INSTALLATION INFORMATION Figure 1 - Example of a Large Room with 1/2 Wall Divider The following formula can be used to determine the maximum heater rating per the definition of unconfined space: Consider two connecting rooms with an open area between, with the following dimensions: If there were a door between the two rooms the calculation would be based only on the room with the heater.
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Page 9: Fireplace And Hearth Dimensions
This appliance has been specifically tested and design certified for installation only in a solid-fuel burning fireplace including factory-built UL127 fireplaces and masonry fireplaces, or in a listed ventless firebox (see below). Exception: DO NOT install this appliance in a factory-built fireplace that includes instructions stating that it has not been tested or should not be used with unvented gas logs. -
Page 10: Placement In A Fireplace With A Restrictive Barrier
PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER IMPORTANT INFORMATION FOR THE INSTALLATION OF THIS GAS LOG SET The following are guidelines for placing a gas log set in a fireplace that has a restrictive barrier along the bottom front open- ing of the fireplace. -
Page 11: Clearances And Height Requirements
The dimensions shown in Figures 4 through 10 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. - Page 12 CLEARANCES and HEIGHT REQUIREMENTS Heat resistant material (minimum requirements) with no wooden mantel or other combustible projec- tion: To install the gas logs into a fireplace with no wooden mantel, shelf or other combustible projection above the fireplace opening, measure the heat resistant material height, per Figure 5, then see TABLE A. Heat resistant materials such as slate and marble must be at least combustible material.
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Page 13: Height Requirements
HEAT RESISTANT MATERIAL MEASUREMENT 20" or more 8" to less than 20" Less than 8" TABLE B - Heat Resistant Material Heights and Mantel Location 12" 6" - 10 " " Heat Resistant Material Hood Heater in Fireplace or Firebox Figure 7 - Minimum Mantel Clearance with Hood Example:... -
Page 14: Floor Clearance
FLOOR CLEARANCE The gas log heater must be installed at least 5" above any combustible flooring material, such as carpeting or tile, which is closer than 14" to the base of the fireplace. The minimum distance must be maintained from the top surface of carpeting, tile, etc. -
Page 15: Fireplace Preparation
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 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. INSTALLING VENTED APPLICATIONS Manual and millivolt controlled gas logs may be installed as a vented decorative log set in compliance with ANSI Z21.60 and National Fuel Gas Code, Section 6.6 Since, the gas logs are operated with the damper open, non-combustible material... -
Page 16: Assembly Procedure
INSTALLING VENTED APPLICATION The fireplace and gas logs function as a system. If the fireplace is spilling into the room (check with a match or a smoke stick), reposition the damper clamp until a positive draft is obtained by opening the damper. If negative pressure in home prevents having a positive draft, contact your dealer for assistance. -
Page 17: Connecting 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 18: Checking Gas Pressure
CHECKING GAS PRESSURE Connecting directly to an unregulated propane/LPG tank can cause an explosion. Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after com- pleting connection. DO NOT USE AN OPEN FLAME. Check the gas pressure with the appliance burning and the control set to HIGH. -
Page 19: Connecting Optional Wall Switch Or Thermostat
CAUTION Label all wires prior to disconnection when servicing controls. W i r i n g e r r o r s c a n cause improper and dangerous operation. Verify proper operation after servicing. Wall Switch On/Off Switch TP/TH = 2 CONNECTING OPTIONAL WALL SWITCH OR THERMOSTAT 1. -
Page 20: Checking System Operation
ELECTRICAL WIRING (MILLIVOLT) CONNECTING OPTIONAL REMOTE RECEIVER FOLLOW INSTRUCTIONS SUPPLIED WITH THE REMOTE. 1. Connect the wires to the two .25" male connectors located on the left side of the valve when facing the unit (See Figure 16, page 19). Do not let wire touch grate or burner. 2. -
Page 21: Placing The Decorative Rock
Before you begin — This unit is supplied with a four ceramic fiber log units. Do not handle the log unit with your bare hands. Always wear gloves to prevent skin irritation from ceramic fibers. After handling the log unit, wash your hands gently with soap and water to remove any traces of fibers. -
Page 22: Eyf18-R
LOG PLACEMENT INSTALLING EYF18-R LOG SET ON UNIT Rear Log (#1) Figure 19 - Installing Rear Log (#1) Front Log (#3) Figure 21 - Installing Front Log (#3) 1. Place Rear Log (#1) on rear support. See Figure 19. 2. Place Middle Log (#2) on middle support. See Figure 20. 3. -
Page 23: Eyf24-R
INSTALLING EYF24-R OR EYF30-R LOG SET ON UNIT Rear Log (#1) Figure 24 - Installing Rear Log (#1) Front Log (#3) Figure 26 - Installing Front Log (#3) Top Left Log (#5) Figure 28 - Installing Top Left Log (#5) 1. -
Page 24: Flame Appearance
FLAME APPEARANCE Flames from the pilot, front and rear burner should be visually checked as soon as the heater is installed. In addition, periodically check the flames visually during operation. CHECKING THE PILOT FLAME The pilot flame must always be present when the heater is in operation. It should just touch the top of the ther- mocouple tip for natural. -
Page 25: Checking Burner Flame
In normal operation at full rate after 15 minutes, the following flame appearances should be observed: The left and right flames should be yellow and extend 1" to 2" above the log top surfaces. The yellow flames should not contact the logs. OPERATING INSTRUCTIONS Avoid any drafts that alter burner flame patterns. -
Page 26: For Your Safety Read Before Lighting
OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the unit by hand. B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. -
Page 27: Manual Control Lighting Instructions
MANUAL CONTROL LIGHTING INSTRUCTIONS STOP! Read the safety information. Make sure the manual shutoff valve is fully open. This heater is equipped with an ignition device (piezo) which automatically lights the pilot. See Figure 35, page 26 for the location of the piezo ignitor and control knob. Push in gas control knob slightly and turn control knob clockwise NOTE: Knob cannot be turned to OFF unless knob is pushed in slightly. -
Page 28: Millivolt Control Lighting Instructions
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, see instructions for Match Lighting Instructions, page 29. -
Page 29: Match Lighting Instructions
OPERATING 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. 3. -
Page 30: Troubleshooting
TROUBLESHOOTING Note: All troubleshooting items are listed in order of operation. OBSERVED PROB- POSSIBLE CAUSE When ignitor button is 1. Ignitor electrode positioned wrong. pressed, there is no spark 2. Ignitor electrode is broken. at ODS/pilot. 3. Ignitor electrode not connected to ignitor 4. - Page 31 OBSERVED PROB- POSSIBLE CAUSE ODS/pilot lights, but flame 1. Control knob not fully pressed in. goes out when control knob 2. Control knob not pressed in long enough. is released. 3. Manual shutoff valve not fully open. 4. Thermocouple connection loose at control 5.
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Page 32: Illustrated Parts Breakdown
ILLUSTRATED PARTS BREAKDOWN 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. 7 - Millivolt 7 - Manual 65D1009... -
Page 33: Replacement Parts List
REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. Item Description Common Parts Burner Piezo Ignitor Manual Control Injector ODS Pilot Assembly Piezo Wire Knob Control Control Valve Regulator Manual Control Parts Not Shown Regulator to Valve Tube Valve to Burner Tube Pilot Tube Pilot Regulator Millivolt Control... - Page 34 ILLUSTRATED PARTS BREAKDOWN EYF24-F Item Description Qty. Main Log Front Log Top Left Log Top Right Log EYF18-R Item Description Qty. Rear Log Middle Log Front Log Top Log EYF24-R & EYF30- Item Description Qty. Rear Log Middle Log Front Log Top Right Log Top Left Log EYF24-F...
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Page 35: Massachusetts Requirements
Massachusetts Residents Only — Please read and follow these special requirements 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. -
Page 36: Limited Lifetime Warranty Policy
MONESSEN HEARTH SYSTEMS CO. LIMITED LIFETIME WARRANTY POLICY LIFETIME WARRANTY The following components are warranted for life to the original owner, subject of proof of purchase: Chassis, 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: Refrac- tory Cement and Ceramic Fiber Logs.
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Questions and answers
Was it ill-advised to install the main shutoff valve BEHIND the gas logs as in the uploaded picture?
No, it is not advisable to install the main shutoff valve behind the gas logs for the Monessen EYF18. The shutoff valve should be accessible for safety and maintenance.
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