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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
7.
20301726 7/11 Rev. 4
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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 22. The appliance must be isolated from the gas supply 18. Unvented gas heaters emit moisture into the living piping system by closing its equipment shutoff valve area. In most homes of average construction, this during any pressure testing of the gas supply piping does not pose a problem.
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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. Millivolt control has four (4) positions: All gas to the gas logs is shut off at the valve. -
Page 6: Fireplace & System Dimensions
FIREPLACE & SYSTEM DIMENSIONS CFX Vent Free Fireplace System 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
GETTING STARTED CFX Vent Free Fireplace System 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: 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 9. -
Page 9: Clearances And Height Requirements
CLEARANCES and HEIGHT REQUIREMENTS CFX Vent Free Fireplace System Ensure that minimum clearances shown in Figure 4 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 10: Remove Screen
CFX Vent Free Fireplace System GENERAL INSTALLATION INFORMATION REMOVE SCREEN Figure 5 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 5 - FP2109a... -
Page 11: Install Mantel
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”... -
Page 12: Firebox To Mantel Installation
FIREPLACE INSTALLATION CFX Vent Free Fireplace System 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 8 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 13: General Installation Information
GENERAL INSTALLATION INFORMATION 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. -
Page 14: 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 15: Connect The Gas
CONNECT THE GAS CFX Vent Free Fireplace System 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 16: 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 17: Electrical Wiring (Millivolt)
ELECTRICAL WIRING - MILLIVOLT CFX Vent Free Fireplace System The millivolt valve is a self-powered combination gas control that DOES NOT REQUIRE 110V AC TO OPERATE. ODS Pilot On/Off Switch Field Installed ODS Pilot Wall Switch or Remote Receiver Millivolt Valve On/Off Switch Spade Terminal... -
Page 18: Connect Remote Receiver
ELECTRICAL WIRING - MILLIVOLT CFX Vent Free Fireplace System CONNECT REMOTE RECEIVER THESE INSTRUCTIONS SUPERSEDE THE SECTION ENTITLED “HEARTH MOUNT” IN THE M HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. ILLIvOLT 1. Remove bottom louver door. 2. Connect the remote connectors located in the unit. 3. -
Page 19: 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 17 - Log Placement CFX24 LG588 LG588 CFX24 logs 20301726... -
Page 20: Place Rock Wool
CFX Vent Free Fireplace System LOG & ROCKWOOL PLACEMENT Rear Log PROPER INSTALLATION SEQUENCE (CFX32) Figure 18 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 21: Flame Appearance
Incorrect Appearance of Pilot Flame orange color during the burn off time. FP2115 Millivolt wrong fl LG592 Figure 23 - LG591 Figure 22 - Burner Flame Appearance - CFX32 Burner Flame Appearance - CFX24 LG591 LG592 CFX24 log flame CFX32 log flame 20301726... -
Page 22: 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 23: For Your Safety Read Before Lighting
OPERATING INSTRUCTIONS CFX Vent Free Fireplace System 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 25. -
Page 24: Millivolt Control Lighting Instructions
CFX Vent Free Fireplace System 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, Refer to the instructions for Match Lighting Instructions, Page 25. -
Page 25: Match Lighting Instructions
OPERATING 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. -
Page 26: 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 27: Troubleshooting
TROUBLESHOOTING CFX Vent Free Fireplace System 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 28 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 29: Replacement Parts
REPLACEMENT PARTS CFX Vent Free Fireplace System Item Description Qty. CFX24 CFX32 Assy Door, Painted 88D0032K 88D0107K Assy Screen Frame, Painted 88D0034K 88D0109K Screen Assy. 33D4501 33D5501 Left Firebrick (Optional) 26D7061 26D7065 880011 Center Firebrick (Optional) 26D7060 26D7064 CFX face parts... -
Page 30: Burner Parts
REPLACEMENT PARTS CFX Vent Free Fireplace System 880011 CFX burner 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... -
Page 31: Optional Accessories
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 32: 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.