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UNVENTED GAS LOG HEATER OR
VENTED DECORATIVE APPLIANCE
INSTALLATION AND OPERATING INSTRUCTIONS
MODEL YS24/18
Natural Gas or Propane/LPG
Control Type: Manual or Milli-Volt
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 7.
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
• Immediately call your gas supplier from a
• If you cannot reach your gas supplier, call the fire
–
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
phone in your building.
neighbor's phone. Follow the gas supplier's
instructions.
department.
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Related Manuals for Monessen Hearth YS24
Summary of Contents for Monessen Hearth YS24
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Page 1: Installation And Operating Instructions
UNVENTED GAS LOG HEATER OR VENTED DECORATIVE APPLIANCE INSTALLATION AND OPERATING INSTRUCTIONS MODEL YS24/18 Natural Gas or Propane/LPG Control Type: Manual or Milli-Volt 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. -
Page 2: Table Of Contents
CONTENTS IMPORTANT SAFETY INFORMATION ....................... 3 GETTING STARTED ............................5 PRODUCT FEATURES AND SPECIFICATIONS....................6 GENERAL INSTALLATION INFORMATION ......................7 FIREPLACE AND HEARTH DIMENSIONS ......................9 PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER ..............10 CLEARANCES AND HEIGHT REQUIREMENTS ....................11 FLOOR CLEARANCE ............................ -
Page 3: Important Safety Information
IMPORTANT SAFETY INFORMATION INSTALLER OWNER Please leave these instructions with the owner. Please retain these instructions for future reference. IMPORTANT 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. •... - Page 4 IMPORTANT SAFETY INFORMATION Continued from page 3 24. Never burn solid fuels in a fireplace where a unvented room heater is installed. 16. Keep room area clear and free from combustible mate- 25. Always have a fireplace screen in place when the appli- rials, gasoline and other flammable vapors and liquids.
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Page 5: Getting Started
GETTING STARTED 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 grate/burner assembly • Plastic bag containing crushed volcanic rock •... -
Page 6: Product Features And Specifications
Min. 5" w.c. Gas Inlet Pressure: Max. 10 1/2" w. c. Min. 5" w.c. Gas Rate Model Number Control Max BTU/Hr Min BTU/Hr YS24/18NM Manual 28,000 15,000 YS24/18NV Milli-Volt 28,000 18,000 PROPANE/LPG Note: An external regulator is required to reduce supply pressure to a maximum of 13" w.c. -
Page 7: General Installation Information
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… American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National Fire Protection Association, Inc. - Page 8 GENERAL INSTALLATION INFORMATION Counter Fireplace 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: BTU/Hr = (L ) Ft x (W) Ft x (H) Ft x 1000 Consider two connecting rooms with an open area between, with the following dimensions: = 15...
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Page 9: Fireplace And Hearth Dimensions
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 opening of the fireplace. -
Page 11: Clearances And Height Requirements
CLEARANCES 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 wooden mantel or other combustible projection: To install the heater with a wooden mantel, shelf or other combustible projection above, first measure the heat resistant material shown in Figure 6. HEAT RESISTANT YS24 MATERIAL REQUIREMENTS FOR MEASUREMENT SAFE INSTALLATION 20"... - Page 13 CLEARANCES HEIGHT REQUIRMENTS HEAT RESISTANT REQUIREMENTS FOR SAFE INSTALLATION WITH WOODEN MANTEL, MATERIAL SHELF OR OTHER COMBUSTIBLE PROJECTION MEASUREMENT 20" or more Hood not required. Observe profiles (side elevations) shown in Figure 8. 8" to less than 12" Install hood and observe profiles shown in Figure 7; OR extend heat resistant material to at least 12"...
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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
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. -
Page 16: Installing Vented Applications
INSTALLING VENTED APPLICATIONS 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
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 The heater gas inlet connection is a " NPT at the valve. On units with Millivolt control, the inlet connection is on the right side, when Connecting directly to an you face the unit. On units with manual control, the inlet connection unregulated propane/LPG is on the right. -
Page 19: Electrical Wiring (Milli-Volt)
ELECTRICAL WIRING (MILLI-VOLT) The milli-volt valve is a self-powered combination gas control THAT DOES NOT REQUIRE 110 VAC TO OPERATE. CAUTION Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous Pilot operation. Verify proper operation On/Off after servicing. - Page 20 ELECTRICAL WIRING (MILLI-VOLT) CONNECTING REMOTE RECEIVER THESE INSTRUCTIONS SUPERCEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. 1. Cut cable to length (approximately 12") for place- Remote ment in the fireplace. Receiver 2. Strip back "...
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Page 21: Log Placement
LOG PLACEMENT Before you begin — This unit is supplied with a two 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: 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 thermocouple tip for natural. -
Page 23: Checking The Burner Flame
CHECKING THE BURNER FLAME In normal operation at full rate after 15 minutes, the following flame appearances should be observed: Figure 23 - Correct Appearance of Rear Flames The left and right flames should be yellow and extend 1"-2" above the log top surfaces. The yellow flames should not contact the logs. -
Page 24: Operating Instructions
OPERATING INSTRUCTIONS 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 an ignition device which automatically lights the pilot. Do not try to light the unit by hand. -
Page 25: Manual Control Lighting Instructions
OPERATING 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. Refer to Figure 24, page 24 for the location of the piezo ignitor and control knob. Push in gas control knob slightly and turn control knob clockwise to the OFF position. -
Page 26: Milli-Volt Control Lighting Instructions
OPERATING INSTRUCTIONS MILLI-VOLT 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 27. -
Page 27: Match Lighting Instructions
OPERATING INSTRUCTIONS CLEANING AND SERVICING 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. 3. -
Page 28: Troubleshooting
TROUBLESHOOTING Turn appliance OFF and allow to cool before servicing. Only a qualified service person should service and repair the heater. Note: All troubleshooting items are listed in order of operation. REMEDY OBSERVED PROBLEM POSSIBLE CAUSE 1 Replace ignitor. When ignitor button is pressed, 1. - Page 29 TROUBLESHOOTING If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfire when lit. If the gas quality or pressure is low, contact your local gas supplier immediately. REMEDY POSSIBLE CAUSE OBSERVED PROBLEM 1.
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Page 30: 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. YS24/18 39D3200... -
Page 31: Replacement Parts List
REPLACEMENT PARTS LIST REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. Item Description Natural Propane Common Parts Burner 39D3006 39D3007 Piezo Ignitor 14D0503 14D0503 Main Log 39D3014 39D3014 Top Log 36D3015 36D3015 Manual Control Injector 39D3029 39D3027 ODS Pilot Assembly 26D2529 26D2530 Piezo Wire 00K0632... -
Page 32: Warranty
This warranty is expressly in lieu of other warranties, express or implied, including the warranty of merchantabil- ity of fitness for purpose and of all other obligations or liabilities. Monessen Hearth Systems, Inc. does not assume for it any other obligations or liability in connection with the sale or use of the appliance. In states that do not allow limitations on how long an implied warranty lasts, or do not allow exclusion of indirect damage, those limitations of exclusions may not apply to you.