Monessen Hearth PH18 Installation And Operating Instructions Manual

Monessen Hearth PH18 Installation And Operating Instructions Manual

Unvented gas log heater/ vented decorative

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Unvented Gas Log Heater/ Vented Decorative
Appliance Installation and Operating Instructions
Models: PH18 (for use with PH18R Log Sets)
PH24 (for use with PH24R or PH30R Log Sets)
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 per-
formed by a qualified installer, service
agency or the gas supplier.
Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020
652035
PH logs 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 8.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for
future reference.

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Summary of Contents for Monessen Hearth PH18

  • Page 1 – Installation and service must be per- INSTALLER: Leave this manual with the appliance. formed by a qualified installer, service CONSUMER: Retain this manual for agency or the gas supplier. future reference. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 2: Table Of Contents

    Propane/LP gas and natural gas are both odorless. An odor-making agent is added to each of these gases. The odor helps you detect a gas leak. However, the odor added to these gases can fade. Gas may be present even though no odor exists. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 3: Important Safety Information

    These chemicals are not 11. Do not install the heaters in a bathroom or bedroom. harmful but may produce annoying smoke and smells Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 4: Codes

    State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings. ca.gov. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 5: Product Features

    The pilot can only be relit when adequate fresh air is available. THERMAL GENERATOR The millivolt gas log pilot is fitted with a millivolt (thermopile) generator to provide power for remote activation. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 6: Getting Started

    National • Hand held Thermostat Remote with receiver Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code or applicable local codes. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 7: Fireplace And Hearth Dimensions

    Table) Reference Drawing of a Natural to overheat and malfunction. Flame Log Set in an Enclosure FP2794 FP2794 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020 logs in enclosure...
  • Page 8: Adequate Combustion Ventilation Air

    If there were a door between the two rooms the calculation would be based only on the room with the heater. BTU/Hr = (15 ) x (12) x (8) Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 9: Clearances And Height Requirements

    IMPORTANT: If you cannot meet these minimum clearanc- es you must operate the heater with chimney flue damper open. Refer to "Installing Vented Applications" found on Page 12. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 10: Installation Requirements

    Example: The bottom of the mantel may project from the FP2535 wall a maximum of 10" at a minimum of 28" min mantel no hood above the opening. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 11 Less 14” Minimum than 5" FP2925 Figure 10 - Minimum Clearance Above Combustible Flooring with Noncombustible Material Installed at Base of Fireplace FP2925 min noncomb floor clear Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 12: Installation

    Placement in a sealant. Do not seal chimney flue damper. Fireplace with Restrictive Barrier on Page Install and operate the appliance as directed in this manual. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 13: Assembly Procedure

    13" w.c. This is in addition to the internal regulator in the heater valve. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 14: Check Gas Pressure

    Figure 15 - Millivolt Control Pressure Test Point Location FP2372 millivolt valve NPT Test Plug FP2499 Figure 14 - Manual Control Pressure Test Point Location FP2499 manual valve Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 15: Electrical Wiring - Millivolt

    TP/TH and one wire to TH. The color of the wires does not matter. Or you can hook the wall switch or thermostat to wires on the unit. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 16: Optional Remote Receiver

    Meter Leads Thermostat Reading Test To Test To Terminals Contacts Should Be Complete 2 & 3 Closed Minimum 175mV System Thermopile 1 & 2 Open Minimum 500mV Output Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 17: Log Placement

    Simply open the windows for a few hours to vent the odor. Figure 18 LG1085 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 18 Figure 19 PH18 log 4 6. Rest Right Top Log (#6) on front and rear log cutouts. Figure 20 Figure 20 LG1087 LG1087 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020 PH18 logs 5 6...
  • Page 19: Ph24-R

    Simply open the windows for a few hours to vent the odor. LG1089 Figure 22 LG1089 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020 PH24 logs 2 3...
  • Page 20 Figure 24 6. Rest Right Top Log (#6) on front and rear log cutouts. Figure 24 LG1091 Figure 24 LG1091 PH 24 logs 5 6 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 21: Ph30-R

    After installing each log, check to be sure it is stable. Figure 25 LG1092 Right Middle LG1092 Log #3 Left Middle Log #2 PH30 log 1 LG1093 Figure 26 LG1093 PH30 logs 2 3 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 22 During initial operation of the new heater, burning logs will give off a paper burning smell and orange flames will be present. Simply open the windows for a few hours to vent the odor. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 23: Flame Appearance

    LP Thermocouple for LP FP2273 FP2502 Figure 30 - Figure 32 - Incorrect Pilot Flame Appearance Incorrect Pilot Flame Appearance Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020 FP2273 pilot bad flame FP2501...
  • Page 24: Burner Flame

    2" above the log top surfaces. The yellow flames should not contact the logs. Figure 33 - Correct Burner Flame Appearance LG1099 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 25: Operating Instructions

    This appliance must not be used with glass doors in the closed position. This can lead to pilot outages and severe sooting outside the fireplace. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 26: For Your Safety Read Before Lighting

    Piezo Ignitor Switch LG1097 Location of Piezo Ignitor, Control Knobs Control and Switch on Millivolt Unit Knobs LG1097 PH burner controls Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 27: Manual Control Lighting Instructions

    TO TURN OFF GAS TO HEATER to OFF position to completely shut off the heater. 1. Turn control knob clockwise 2. If applicable: Turn off all electric power to the heater. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 28: Millivolt Control Lighting Instructions

    2. If applicable: Turn ON/OFF switch to OFF position and/or set thermostat (if present) to lowest setting. 3. If applicable: Turn off all electric power to the heater. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 29: Match Lighting Instructions

    Failure to keep air intake holes clean will result in sooting and poor combustion. • External case should be dusted and wiped with a wet soapy cloth. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 30: Troubleshooting

    Repeat igniting operation until air is removed. 5. ODS/pilot is clogged. 5. Replace ODS/pilot assembly or get it services. 6. Gas regulator setting is not correct. 6. Check incoming pressure. Replace gas regulator. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 31 If the gas quality or pressure is low, contact your local gas supplier immediately. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 32: Service Parts

    Ending Manufacturing Date: Active PH18NM (Natural Gas Manual Control) PH18PM (Propane Manual Control) PH18NV (Natural Gas Millivolt Control) PH18PV (Propane Millivolt Control) Part number list on following page. 03/20 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 33 Injector, Millivolt Control Propane SRV20H3144 Regulator to Valve Tube Manual Control SRV65D1004 65D1005K No longer available Valve to Burner Tube Millivolt Control 65D1007K Pilot Regulator (Millivolt Control) NG Only SRV14D0469 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 34 13.1 Rear Log 20303849K 13.2 Left Middle Log 20303850K 13.3 Right Middle Log 20303851K 13.4 Front Log 20303852K 13.5 Left Top Log 20303853K 13.6 Right Top Log 20303854K Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 35 Ending Manufacturing Date: Active PH24NM (Natural Gas Manual Control) PH24PM (Propane Manual Control) PH24NV (Natural Gas Millivolt Control) PH24PV (Propane Millivolt Control) Part number list on following page. 03/20 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 36 Injector, Millivolt Control Propane SRV57D0612 Regulator to Valve Tube Manual Control SRV65D1004 Manual Control 65D1006K Valve to Burner Tube Millivolt Control 65D1008K Pilot Regulator (Millivolt Control) NG Only SRV14D0469 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 37 14.1 Rear Log 65D2015K 14.2 Left Middle Log 65D2017K 14.3 Right Middle Log 65D2018K 14.4 Front Log 65D2016K 14.5 Left Top Log 65D2013K 14.6 Right Top Log 65D2014K Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 38: Accessories

    Wall Switch Kit MVSW Millivolt Only Wall Thermostat Kit Millivolt Only Remote Controls RCMT, RCB, RCBE Millivolt Only Thermostat Remote Controls RCT, RCST, RCSITE, WWTA, WWTD Millivolt Only Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 39: Massachusetts Residents Only

    (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed. Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 40: Warranty

    (engine, inner cover,access cover and fireback) None 1 Year All replacement parts beyond warranty period See conditions, exclusions and limitations on the next page Page 1 of 2 4021-645K 1/20 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 41 OTHER THAN THE WARRANTY SPECIFICED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE EXPRESSED WARRANTY SPECIFIED ABOVE. 4021-645K 1/20 Page 2 of 2 Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...
  • Page 42 PH Gas Logs Monessen, a brand of Hearth & Home Technologies 7571 215th Street West, Lakeville, MN 50044 www.monessenhearth.com Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020...

This manual is also suitable for:

Ph24Ph18pmPh18nmPh18rPh24rPh30r

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