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Monessen Hearth CFX24 Installation And Operating Instructions Manual

Vent-free fireplace systems
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Vent-free Fireplace Systems
Models: CFX24, CFX32
Natural Gas or LP, Millivolt

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.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future refer-
ence.
1726
CFX cover
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
9.
20301726 3/10 Rev. 1

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Table of Contents
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  Summary of Contents for Monessen Hearth CFX24

  • Page 1: Installation And Operating Instructions

    Vent-free Fireplace Systems Models: CFX24, CFX32 Natural Gas or LP, Millivolt 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.
  • Page 2: Table Of Contents

    CFX Vent Free Fireplace System CFX Series gas log appliances described in this manual feature the TRIPLE PLAY BURNER SYSTEM producing a full random yellow flame, full depth ember bed and glowing logs. Important Safety Information ... 3 Product Features and Specifications ... 5 Gas Pressures ...
  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION INSTALLER Please leave these instructions with the appliance. Read these instructions carefully before installing or trying to operate a vent-free gas heater in this firebox. • Any change to this heater or its controls can be dangerous. •...
  • Page 4 CFX Vent Free Fireplace System 18. During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents. These chemicals are not harmful but may produce annoying smoke and smells as they are burned off during the initial operation of the appliance;...
  • Page 5: Product Features And Specifications

    PRODUCT FEATURES & SPECIFICATIONS HI/LO Control Knob Control Knob Figure 1 - Unvented Gas Heater (Control Access Door Shown Open) FP2750 OPERATION CFX controls This unvented gas heater requires no outside venting and burns cleanly with high heating efficiency. This zero-clearance unvented gas heater can be installed against any wall that is accessible to a gas line.
  • Page 6: Fireplace & System Dimensions

    CFX Vent Free Fireplace System Figure 2 - Firebox Dimensions Ref. CFX24 1726 11C\v" (299 mm) CFX Barrington dims 19C\v" (502 mm) 26M\," (683 mm) 52Z\x" (1334 mm) (1118 mm) 26B\," (676 mm) 4Z\x" (114 mm) 15" (381 mm) 11Z\x" (292 mm) FIREPLACE &...
  • Page 7: Getting Started

    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 heater • Two (2) 90°-angle brackets • Facing •...
  • Page 8: Combustion And Ventilation Air

    CFX Vent Free Fireplace System 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/NFPA54), defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour (4.8 m gate input rating of all appliances installed in that space, and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8 m...
  • Page 9: Fireplace Installation

    FIREPLACE INSTALLATION Carefully select the best location for installation of your unvented fireplace. The following factors should be taken into consideration. • Clearance to side wall, ceiling, woodwork and window or other combustibles. Refer to Clearances and Height Requirements section on Page 10. Minimum clearances to combustibles must be main- tained.
  • Page 10: Clearances And Height Requirements

    CFX Vent Free Fireplace System Ensure that minimum clearances shown in Figure 5 are maintained. Left and right clearances are deter- mined when facing the front of the firebox. Follow these instructions carefully to ensure safe installation. Failure to follow these requirements may create a fire hazard.
  • Page 11: Remove Screen

    GENERAL INSTALLATION INFORMATION REMOVE SCREEN Figure 6 1. Remove bottom access door. 2. Remove fireplace screen frame panel by pushing screen frame panel up and out. Do not operate the unit without the screen frame panel installed. Figure 6 - Remove Fireplace Screen Frame Panel NOTE: Fireplace screen must be removed to access log box.
  • Page 12: Install Mantel

    CFX Vent Free Fireplace System 1. Place base near final position. Make sure you have access to all four (4) sides. 2. Place sides in the approximate location on base. Align back edge of side with back of base. Secure joining block #1 to bottom of side using two (2) 1Z\v” screws. Be sure joining block is flush with bottom of side piece.
  • Page 13: Firebox To Mantel Installation

    FIREPLACE INSTALLATION FIREBOX TO MANTEL INSTALLATION 1. Slide fireplace into mantel. 2. Use the two (2) 'L' brackets provided to secure the fireplace to the mantel. Figure 9 3. When the fireplace is in the proper position, centered in mantel opening, remove the control panel door and secure fireplace through holes provided in base to the floor of the mantel using screws provided.
  • Page 14: Install Optional Firebrick Panels

    CFX Vent Free Fireplace System INSTALL OPTIONAL FIREBRICK PANELS 1. Remove optional firebrick panels from packaging. Check to see that you have the following: • Firebrick panels, 3 • Retainer brackets, 2 • B lack screws, 2 If any part or parts are missing, contact dealer where you bought fireplace. 2.
  • Page 15: Connecting The Gas

    CONNECT THE GAS CHECK GAS TYPE Use proper gas type for the fireplace you are installing. If you have conflicting gas type, do not install fireplace. See dealer where you purchased the fireplace for proper fireplace for your gas type or conversion kit. INSTALLING GAS PIPING TO FIREPLACE / BURNER SYSTEM LOCATION A qualified installer or service person must connect appliance to gas supply.
  • Page 16: Connect The Gas

    CFX Vent Free Fireplace System Only persons licensed to work with gas piping may make the necessary gas connections to this appliance. NOTE: The gas line connection may be made using 1/2" rigid tubing or an approved flex connector. Since some municipalities have additional local codes it is always best to consult your local authorities and the current edition of the National Fuel Gas Code ANSI.Z223.1, NFPA54.
  • Page 17: Check Gas Pressure

    CHECK GAS PRESSURE 1. Check gas type. The gas supply must be the same as stated on the appliance’s rating decal. If the gas supply is different from the fireplace, STOP! Do not install the appliance. Contact your dealer immediately. 2.
  • Page 18: Electrical Wiring (Milli-Volt)

    CFX Vent Free Fireplace System The milli-volt valve is a self-powered combination gas control that DOES NOT REQUIRE 110V AC TO OPERATE. Wall Switch On/Off Switch TH = 3 TP = 1 TP/TH = 2 Figure 16 - Wiring Diagram Label all wires prior to disconnection when servicing controls.
  • Page 19: Connect Remote Receiver

    ELECTRICAL WIRING (MILLI-VOLT) CONNECT REMOTE RECEIVER THESE INSTRUCTIONS SUPERSEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. 1. Remove bottom louver door. 2. Connect the remote connectors located in the unit. 3. Apply Velcro pads with self-adhesive backing to bottom of remote receiver and to floor of compart- ®...
  • Page 20: Log Placement

    Right Log #1 Left Log Burner Pins Figure 18 - Log Placement CFX24 LG588 CFX24 logs LOG PLACEMENT Rear Log Burner Pins LG588...
  • Page 21: Place Rock Wool

    LOG & ROCKWOOL PLACEMENT PROPER INSTALLATION SEQUENCE (CFX32) Figure 19 1. Install front right log (#1) on two pins on right side of burner. 2. Install left front log (#2) on two pins on left side of burner. 3. Install back log (#3) on back of burner. 4.
  • Page 22: Flame Appearance

    Figures 23 and 24. There should be glowing embers in front of burner. NOTE: The front flames and embers will be an opaque orange color during the burn off time. Figure 23 - Burner Flame Appearance - CFX24 LG591 CFX24 log flame Thermocouple for Natural...
  • Page 23: Operating Instructions

    CFX Vent Free Fireplace System CHECK THE BURNER FLAME 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.
  • Page 24: For Your Safety Read Before Lighting

    CFX Vent Free Fireplace System FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance is equipped with a piezo ignition device which automatically lights the pilot. If piezo is not working properly refer to Match Lighting Instructions, Page 26. 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 25: 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 the instructions for Match Lighting Instructions, Page 26.
  • Page 26: Match Lighting Instructions

    CFX Vent Free Fireplace System 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 27: Blower And Optional Equipment

    If you are installing the forced air kit (Models BLO24-T or BLOT), see the installation instructions provided with the kit for electrical wiring requirements or the blower installation section. Model CFX24 uses blower model BLO24T. Model CFX32 uses blower model BLOT.
  • Page 28: Troubleshooting

    CFX Vent Free Fireplace System Turn appliance OFF and allow to cool before servicing. Only a qualified service person should service and repair the heater. OBSERVED PROBLEM POSSIBLE CAUSE When ignitor button is 1. Ignitor electrode positioned wrong. pressed, there is no spark at ODS/pilot.
  • 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. OBSERVED PROBLEM POSSIBLE CAUSE ODS/pilot lights, but flame 1.
  • Page 30: Replacement Parts

    CFX Vent Free Fireplace System Item Description Assy Door, Painted Assy Screen Frame, Painted Qty. 880011 CFX face parts 12/08 REPLACEMENT PARTS CFX24 CFX32 88D0032K 88D0107K 88D0034K 88D0109K 20301726...
  • Page 31: Burner Parts

    REPLACEMENT PARTS 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. 20301726 880011 CFX burner parts CFX Vent Free Fireplace System...
  • Page 32 #2 Right Log #3 Rear Log #4 Right Middle Log #5 Left Middle Log Parts Available, Not Shown Tube Nut, 5/16 Tube Ferrule, 5/16 Flex Tube w/Fittings Rock Wool Bag CFX24 Qty. Natural Propane 33D4043 33D4043 59D0062 33D4046 58D0454 33D4058...
  • Page 33 CFX Vent Free Fireplace System 20301726...
  • Page 34 CFX Vent Free Fireplace System 20301726...
  • Page 35: Warranty

    LIMITED LIFETIME WARRANTY POLICY CFX Vent Free Fireplace System LIFETIME WARRANTY The following components are warranted for life to the original owner, subject to proof of pur- chase: Firebox, Combustion Chamber, Heat Exchanger, Grate and Stainless Steel Burners. FIVE YEAR WARRANTY The following components are warranted five (5) years to the original owner, subject of proof of purchase: Ceramic Fiber Logs, Catalytic Filter and Aluminzed Burners.
  • Page 36 MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.com...

This manual is also suitable for:

Cfx32