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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 8/10 Rev. 2
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Table of Contents
Related Manuals for MHSC CFX24
Summary of Contents for MHSC CFX24
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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 CONTENTS CFX Series gas log appliances described in this manual feature the TRIPLE PLAY BURNER SYSTEM with exclusive triple effect technology ® producing a full random yellow flame, full depth ember bed and glowing logs. Important Safety Information ........ -
Page 3: Important Safety Information
CFX Vent Free Fireplace System IMPORTANT SAFETY INFORMATION INSTALLER OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. IMPORTANT Read these instructions carefully before installing or trying to operate a vent-free gas heater in this firebox. •... - Page 4 CFX Vent Free Fireplace System IMPORTANT SAFETY INFORMATION 21. The appliance must be isolated from the gas supply 18. During manufacturing, fabricating and shipping, various piping system by closing its equipment shutoff valve components of this appliance are treated with certain during any pressure testing of the gas supply piping oils, films or bonding agents.
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Page 5: Product Features And Specifications
CFX Vent Free Fireplace System PRODUCT FEATURES & SPECIFICATIONS IGNITION CONTROLS Piezo ignitor allows ignition of the pilot without the use of matches or batteries. Milli-Volt control has four (4) positions: All gas to the gas logs is shut off at the valve. -
Page 6: Fireplace & System Dimensions
CFX Vent Free Fireplace System FIREPLACE & SYSTEM DIMENSIONS Figure 2 - Firebox Dimensions Ref. CFX24 CFX32 1726 11C\v" (299 mm) 15Z\v" (387 mm) CFX Barrington dims 19C\v" (502 mm) 26" (660 mm) 26M\," (683 mm) 33" (838 mm) 52Z\x" (1334 mm) 61>\zn"... -
Page 7: Getting Started
CFX Vent Free Fireplace System GETTING STARTED GETTING STARTED Do not install the heater: Make sure you have received all parts: • Where curtains, furniture, clothing, or Check your packing list to verify that all listed parts have other flammable objects are less than been received. -
Page 8: Combustion And Ventilation Air
CFX Vent Free Fireplace System 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/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 per kw) of the aggre- gate input rating of all appliances installed in that space, and an unconfined space as a space... -
Page 9: Fireplace Installation
CFX Vent Free Fireplace System 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. -
Page 10: Clearances And Height Requirements
CFX Vent Free Fireplace System CLEARANCES and HEIGHT REQUIREMENTS 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
CFX Vent Free Fireplace System 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. FP2109a Figure 6 - FP2109a... -
Page 12: Install Mantel
CFX Vent Free Fireplace System INSTALL MANTEL 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”... -
Page 13: Firebox To Mantel Installation
CFX Vent Free Fireplace System 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 GENERAL INSTALLATION INFORMATION 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. -
Page 15: Connecting The Gas
CONNECT THE GAS CFX Vent Free Fireplace System 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. -
Page 16: Connect The Gas
CFX Vent Free Fireplace System CONNECT THE GAS A manual shutoff valve must be installed Only persons licensed to work with gas upstream of the appliance. Union tee piping may make the necessary gas and plugged 1/8” NPT pressure tapping connections to this appliance. -
Page 17: Check Gas Pressure
CFX Vent Free Fireplace System 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. -
Page 18: Electrical Wiring (Milli-Volt)
CFX Vent Free Fireplace System ELECTRICAL WIRING (MILLI-VOLT) The milli-volt valve is a self-powered combination gas control that DOES NOT REQUIRE 110V AC TO OPERATE. ODS Pilot On/Off Switch ODS Pilot Wall Switch Millivolt Valve On/Off Switch Spade Terminal TH = 3 TP = 1 TP/TH = 2 Figure 16 -... -
Page 19: Connect Remote Receiver
ELECTRICAL WIRING (MILLI-VOLT) CFX Vent Free Fireplace System 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. -
Page 20: Log Placement
2. Install the right log (#1) on burner pins on right side of burner. 3. Install the left log (#2) on burner pins on left side of burner. Burner Pins Burner Pins Figure 18 - Log Placement CFX24 LG588 LG588 CFX24 logs 20301726... -
Page 21: Place Rock Wool
CFX Vent Free Fireplace System LOG & ROCKWOOL PLACEMENT Rear Log PROPER INSTALLATION SEQUENCE (CFX32) Figure 19 1. Install front right log (#1) on two pins on right Left Middle Log #5 side of burner. 2. Install left front log (#2) on two pins on left side of burner. -
Page 22: Flame Appearance
Incorrect Appearance of Pilot Flame orange color during the burn off time. FP2115 Millivolt wrong flame LG592 Figure 24 - LG591 Figure 23 - Burner Flame Appearance - CFX32 Burner Flame Appearance - CFX24 LG591 LG592 CFX24 log flame CFX32 log flame 20301726... -
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 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 a piezo ignition device which automatically lights the pilot. If piezo is not working properly refer to Match Lighting Instructions, Page 26. -
Page 25: Milli-Volt Control Lighting Instructions
CFX Vent Free Fireplace System 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 OPERATING INSTRUCTIONS 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 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 TROUBLESHOOTING Turn appliance OFF and allow to cool before Note: All troubleshooting items are listed in order servicing. Only a qualified service person of operation. should service and repair the heater. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is 1. - Page 29 TROUBLESHOOTING CFX Vent Free Fireplace System 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.
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Page 30: Replacement Parts
CFX Vent Free Fireplace System REPLACEMENT PARTS Item Description Qty. CFX24 CFX32 Assy Door, Painted 88D0032K 88D0107K Assy Screen Frame, Painted 88D0034K 88D0109K 880011 CFX face parts 12/08 20301726... -
Page 31: Burner Parts
REPLACEMENT PARTS CFX Vent Free Fireplace System 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. 880011 CFX burner parts 20301726... - Page 32 CFX Vent Free Fireplace System REPLACMENT PARTS REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. CFX24 CFX32 Item Description Qty. Natural Propane Natural Propane Burner/Grate Assembly 33D4043 33D4043 33D5050 33D5050 Injector 59D0062 33D4046 33D5040 33D5039 Venturi 58D0454 33D4058 58D0454 58D0454 Millivolt Valve...
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Page 35: 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 36 MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.com...