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UNVENTED GAS LOG HEATER OR
VENTED DECORATIVE APPLIANCE
INSTALLATION AND OPERATING INSTRUCTIONS
This appliance may be installed
in an aftermarket, permanently
located, manufactured (mobile)
home, where not prohibited by
local codes.
This appliance is only for use
with the type of gas indicated on
the rating plate. This appliance is
not convertible for use with other
gases.
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 8.
MODELS: 18HVFL and 24HVFL
Natural Gas or Propane/LPG
Control Type: Manual and Milli-Volt
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.
–
–
–
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
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.
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Table of Contents
Related Manuals for MHH 18HVFL
Summary of Contents for MHH 18HVFL
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Page 1: Installation And Operating Instructions
UNVENTED GAS LOG HEATER OR VENTED DECORATIVE APPLIANCE INSTALLATION AND OPERATING INSTRUCTIONS MODELS: 18HVFL and 24HVFL Natural Gas or Propane/LPG Control Type: Manual and Milli-Volt WARNINGS This appliance may be installed in an aftermarket, permanently If the information in this manual is not followed exactly, a fire or explosion may result causing property damage,... -
Page 2: Table Of Contents
CONTENTS Electrical Wiring (Milli-volt) ........22 Important Safety Information ........3 Connecting Remote Receiver ......23 Getting Started ............5 Installing Thermostat Sensor ......23 Product Features and Specifications ....6 Operation of Thermostat Sensor ....... 25 Natural Gas ............6 Rock Wool and Log Placement ......26 Propane/LP ............6 Seasoned Hardwood ........26 Ignition Controls ...........7... -
Page 3: Important Safety Information
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 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 16. Keep room area clear and free from combustible materi- 24. This appliance must not be used with glass doors in the als, gasoline and other flammable vapors and liquids. closed position. This can lead to pilot outages and severe sooting outside the fireplace.
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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 • Two (2) plastic bags containing crushed volcanic rock •... -
Page 6: Product Features And Specifications
PRODUCT FEATURES SPECIFICATIONS NATURAL GAS NOTE: An external regulator is required to reduce supply pressure to a maximum of 10 " W.C. on natural gas systems operating at higher pressure. Manual Pressure Milli-Volt Regulator Pressure: Setting: 4.0" w.c. Regulator Pressure Setting: 3.5" w.c. Pilot Regulator: 3.5"... -
Page 7: Ignition Controls
PRODUCT FEATURES SPECIFICATIONS IGNITION CONTROLS Piezo ignitor allows ignition of the pilot without the use of matches or batteries. Manual control has three (3) positions: - All gas to the gas logs is shut off at the valve. - Valve position to light/maintain a standing pilot. - Variable position corresponding to desired flame height. -
Page 8: 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 9 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 10: Fireplace And Hearth Dimensions
The HVFL Series unvented room heater may also be installed into a Ventless Firebox Enclosure for Gas Fired Decorative Type Unvented Room Heaters per IAS Requirement No. 2-97 ANSI Z21.91-2001 (typically referred to as a "Universal Firebox"), as long as firebox hearth dimensions meet the minimum hearth dimensions shown below. Model 18HVFL 18" " 27"... -
Page 11: 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 12: Clearances And Height Requirements
CLEARANCES HEIGHT REQUIREMENTS The dimensions shown in Figures 4 through 12 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 13: Clearances And Height Requirements
Fireplace or Firebox Figure 5 - Measuring Heat Resistant Material HEAT RESISTANT REQUIREMENTS FOR SAFE INSTALLATION MATERIAL MEASUREMENT 18HVFL 24HVFL 12" or more Hood not required. Hood not required. 8" to less than 12" Hood not required. Extend heat resistent material to 12"... - Page 14 HEAT RESISTANT REQUIREMENTS FOR SAFE INSTALLATION WITH WOODEN MANTEL, MATERIAL SHELF OR OTHER COMBUSTIBLE PROJECTION MEASUREMENT 18HVFL 24HVFL 12" or more Hood not required. Observe profiles (side Hood not required. Observe profile (side elevations) shown in Figure 7, page 15.
- Page 15 14" above the opening, and a maximum of 6" at a mini- Heater in mum of 20 " above the opening. Fireplace or Firebox Figure 7 - Minimum Mantel Clearance with No Hood - 18HVFL 12" 10" 8" 6" "...
- Page 16 CLEARANCES HEIGHT REQUIRMENTS 10" or less Heat Resistant Material 12" min. 28" Heater in Fireplace or Example: The bottom of the mantel may project from the wall a Firebox maximum of 10" at a minimum of 28" above the Figure 9 - Minimum Mantel Clearance with No Hood — 24HVFL 7"...
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Page 17: 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 18: 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 19: 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 20: 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 21: Checking Gas Pressure
CHECKING GAS PRESSURE The heater gas inlet connection is a " NPT at the valve. On all control type units, the inlet connection is on the right side of unit. C o n n e c t i n g d i r e c t l y t o a n To connect from the opposite side, route the pipe around the back unregulated propane/LPG tank portion of the unit. -
Page 22: 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. Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Pilot On/Off Switch... -
Page 23: Connecting Remote Receiver
ELECTRICAL WIRING (MILLI-VOLT) CONNECTING REMOTE RECEIVER Remote THESE INSTRUCTIONS SUPERCEDE THE SECTION Wire ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT Connectors HAND-HELD REMOTE INSTRUCTIONS SUPPLIED WITH THE REMOTE. 1. Cut cable to length (approximately 12") for placement in the fireplace. 2. Strip back "... - Page 24 ELECTRICAL WIRING (MILLI-VOLT) 5. Route wiring harnesses through large hole on side of unit. Mount bracket to side of unit with screw provided. See Figure 22. 6. Attach wiring harness to either TP/TH and TH on control valve or to existing wiring harness with two (2) 0.250" male spade terminals for remote or t-stat option.
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Page 25: Operation Of Thermostat Sensor
ELECTRICAL WIRING (MILLI-VOLT) OPERATION OF THERMOSTAT SENSOR 1. Follow millivolt lighting instructions on lighting plate attached to unit or in homeownerʼs manual. 2. With control knob in the “ON” position make sure the ON/OFF switch is in the “OFF” position. See Figure 24. 3. -
Page 26: Rock Wool And Log Placement
ROCK WOOL LOG PLACEMENT Before you begin — This unit is supplied with four or five ceramic fiber logs. Do not handle these logs with your bare hands. Always wear gloves to prevent skin irritation from ceramic fibers. After handling the logs, wash your hands gently with soap and water to remove any traces of fibers. -
Page 27: Log Placement
LOG PLACEMENT Install left log cluster (#2) on pin located near left edge of base. See Figure 27. Install right log cluster (#3) on two pins located on right side of base. See Figure 28. Left Log Rest end of top center log (#4) on rear log. Place front end Cluster #2 of top center log where right and left cluster logs meet. -
Page 28: Stacked Pine
LOG PLACEMENT INSTALLING STACKED PINE LOGS ON GRATE 1. Install rear log (#1) on two pins (2) located near the back of base. Check log position and stability. See Figure 30. 2. Install right bottom log (#2) on two (2) pins located on right side of base. See Figure 31. 3. - Page 29 LOG PLACEMENT 5. Place top right back log (#5) on right bottom log and rear log. See Figure 34. 6. Place top right front log (#4) on top right back log and bottom right log. See Figure 35. 7. Place top left front log (#7) on rear log and bottom left log. See Figure 36. Top Right Top Right Front Back Log (#5)
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Page 30: Flame Appearance
FLAME APPEARANCE PLACING THE DECORATIVE ROCK DO NOT sprinkle volcanic rock on the logs, around the pilot, or on or near burners. This may cause sooting. Place volcanic rock only on the floor of the fireplace. During initial operation of the new heater, burning logs will give off a paper burning smell and orange flames will be present. -
Page 31: Checking Burner Flames
CHECKING THE BURNER FLAME In normal operation at full rate after 15 minutes, the following flame appearances should be observed: Figure 41 - Correct Appearance of Rear Flames Figure 42 - Correct Appearance of Rear Flames of Kentucky Stack of Split Maple The left and right rear flames should be yellow and extend 1"-2"... -
Page 32: 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 a piezo ignition device which lights the pilot. If piezo is not working properly see Match Lighting Instructions, page 35. -
Page 33: 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. See Figure 43, page 32 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 34: Milli-Volt/Thermostat 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 35. -
Page 35: 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 36: 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 37 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 OBSERVED PROBLEM POSSIBLE CAUSE ODS/pilot lights, but flame...
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Page 38: Replacement Parts
REPLACEMENT PARTS BURNER ASSEMBLY 5 (Milli-Volt) 5 (Manual) 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. 59D1016... -
Page 39: Replacement Parts List
REPLACEMENT PARTS LIST REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. BURNER ASSEMBLY 18HVFL 24HVFL Item Description Natural Propane Natural Propane Common Parts Piezo Ignitor 14D0503 14D0503 14D0503 14D0503 Piezo Wire 00K0632 00K0632 00K0632 00K0632 Front Burner 59D0050 59D0050 59D0059 59D0059... -
Page 40: Logs
REPLACEMENT PARTS LIST REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. SEASONED HARDWOOD LOGS Item Description 18HSHCL 24SHCL 30SHCL Back Log 59D1238 59D1248 59D1258 Right Log Cluster 59D1230 59D1240 59D1250 Left Log Cluster 59D1234 59D1244 59D1254 Top Center Log 59D1239 59D1249 59D1259 Failure to position the parts in accordance with these diagrams or... - Page 41 REPLACEMENT PARTS LIST REPLACEMENT PARTS ARE AVAILABLE THROUGH YOUR RETAILER. STACKED PINE LOGS Item Description 18SPRL 24SPRL 30SPRL Back Log 59D1300 59D1307 59D1314 Right Bottom Log 59D1301 59D1308 59D1315 Left Bottom Log 59D1302 59D1309 59D1316 Top Middle Log 59D1305 59D1312 59D1319 Top Right Log 59D1304...
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Page 42: Massachusetts Residents Only
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 fi tter when installed within the Commonwealth of Massachusetts. Any residence with a direct vent product must have a CO detector installed in the residence. Installation of the fi... - Page 43 SPECIAL REQUIREMENTS CONTINUED 2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accor- dance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certi- fi ed. 3. SIGNAGE. A metal or plastic identifi cation plate shall be permanently mounted to the exterior of the build- ing at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment.
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Page 44: Warranty
This warranty is expressly in lieu of other warranties, express or implied, including the warranty of merchantability of fitness for purpose and of all other obligations or liabilities. MHH does not assume for it any other obligations or liabilities in con- nection with sale or use of the appliance.
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