Parlor Vent-Free Fireplace System Installation & Operating Instructions Models: PL20 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.
CONTENTS Parlor Vent Free Fireplace Thank you and congratulations on your purchase of an MHSC Fireplace. PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE! IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. Important Safety Information..................................... 3 Code Approval...................................................
IMPORTANT SAFETY INFORMATION Parlor Vent Free Fireplace OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. WARNING INSTALLER • Any change to this heater or its controls can be dangerous. • Improper installation or use of the heater can cause serious injury or death from fire, burns, explosion or carbon monoxide poisoning. • Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns.
IMPORTANT SAFETY INFORMATION Parlor Vent Free Fireplace 22. 23. 24. 25. 26. harmful but may produce annoying smoke and smells as they are burned off during the initial operation of the appliance; possibly causing headaches or eye or lung irritation. This is a normal and temporary occurrence. The initial break-in operation should last two to three hours with the burner at the highest setting. Provide maximum ventilation by opening windows or doors to allow odors to dissipate.
PRODUCT FEATURES Parlor Vent Free Fireplace Gas Specifications Input BTU/hr Model Fuel Control Max. Min. PL20NV Nat. Millivolt 20,000 14,500 PL20PV LP Millivolt 20,000 17,000 NOTE: For LP models an external regulator is required to reduce supply pressure to a maximum of 13" w.c. ignition controls Piezo ignitor allows ignition of the pilot without the use of matches or batteries.
FIREPLACE and FRAMING DIMENSIONS Parlor Vent Free Fireplace 1056QE” (256 mm) 10 6 ” (270 mm) 556 ” (130 mm) 20” (508 mm) Rough Opening Width m m ) 28 5 6 QE” (7 32 (3 14 70 6QE m ” m ) 20 6 " (518 mm) 20 6 " (518 mm) 856O” (216 mm) Rough Opening Depth Rough Opening Height 25 6 ” (651 mm) 3256 ” (816 mm) 31(6 ” (810 mm) Figure 2 Fireplace and Framing Dimensions 11/16" (17 mm) 1856 ” (460 mm) 1956O” (495 mm) 456 ” (105 mm) 1056O" (267 mm) PL20 dims 90D0093
• Gloves are recommended when handling ceramic fiber logs to prevent skin irritation from loose fibers. Logs are fragile — handle with care. Parlor Vent Free Fireplace WARNING WARNING Preinstallation information GETTING STARTED Check your packing list to verify that all listed parts have been received.
FIREPLACE INSTALLATION Parlor Vent Free Fireplace Fireplace Location 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” section on Page 9. Minimum clearances to combustibles must be maintained.
FIREPLACE INSTALLATION Parlor Vent Free Fireplace CLEARANCE and HEIGHT REQUIREMENTS Ensure that minimum clearances shown in Figures 5 and 6 are maintained. Left and right clearances are determined 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. Sidewall Clearances — The clearance from the inside of the appliance to any combustible adjacent wall should not be less than 9".
FIREPLACE INSTALLATION Parlor Vent Free Fireplace If unit is to be “built in”, fireplace framing can be built before or after the appliance is set in place. BE SURE THAT ALL PACKING MATERIAL HAS BEEN REMOVED FROM THE UNDERSIDE OF THE UNIT PRIOR TO SETTING THE FIREBOX IN PLACE. Construct fireplace framing following Figure 2 on Page 6. The framing headers may rest directly on top of the firebox. The fireplace may be installed directly on a combustible floor or a raised platform of an appropriate height.
FIREPLACE INSTALLATION Parlor Vent Free Fireplace SECURE HEATER TO FLOOR OR HEARTH Install ARCHED BRICK LINER Note: Clearance requirements as detailed in “Clearances and Height Requirements” section on Page 9 of this manual, must be met before securing the heater in place. 1. Remove arched brick liner from packaging. 2. Remove two (2) screws holding light fixture to bracket attached to burners. Figure 10 3. Carefully lay light fixture onto burner top. 4.
FIREPLACE INSTALLATION Parlor Vent Free Fireplace WARNING 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. Gas piping system must be sized to provide minimum inlet pressure (Listed on Data Plate) at the maximum flow rate (BTU/hr).
FIREPLACE INSTALLATION Parlor Vent Free Fireplace When tightening the joint to the valve, hold the valve securely to prevent movement. Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after completing connection. DO NOT USE AN OPEN FLAME. Check the gas pressure with the appliance burning and the control set to HIGH. Do not use open flame to check for gas leaks.
ELECTRICAL INSTALLATION Parlor Vent Free Fireplace The millivolt valve is a self-powered combination gas control that DOES NOT REQUIRE 110V AC to operate. ODS Pilot On/Off Switch ODS Pilot Optional Remote or Wall Switch Valve On/Off Switch Spade Terminal TH = 3 TP = 1 TP/TH = 2 WARNING Figure 14 Wiring Diagram FP2112a Switch Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
ELECTRICAL INSTALLATION Parlor Vent Free Fireplace Connect OPTIONAL Remote CONTROL Receiver WARNING CAUTION Figure 15 1. Open bottom access door. 2. Connect the remote wire connectors to the TH, TH/TP connections on the valve. 3. Stick Velcro• pads with self-adhesive backing to bottom of remote receiver and to floor of compartment behind access panel. 4. Attach remote receiver to firebox with Velcro• pads. Control switch must face forward.
ELECTRICAL INSTALLATION Parlor Vent Free Fireplace Check System Operation The millivolt system and individual components may be checked with a millivolt meter having a 0-1000 mV range. Conduct each check shown in chart below by connection meter test leads to terminals as indicated. A. Complete MilliVolt System Check (“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON) a.
LOG PLACEMENT Parlor Vent Free Fireplace CAUTION WARNING Before you begin — This unit is supplied with four (4) 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. The positioning of the logs is critical to the safe and clean operation of this heater.
LOG PLACEMENT Parlor Vent Free Fireplace LOG PLACEMENT Log #1 1. Place Log #1 on burner by aligning notches on bottom side of each end of log with the rear corners of the burner. The light fixture should partially set in cutout of rear log. Ensure log is sitting firmly on burner and is locked in where it cannot slide forward on the burner. Figure 18 Figure 18 Place Log #1 LG719 2. Place Log #2 on burner by aligning hole in bottom of log with pin located at front of burner.
LOG PLACEMENT Parlor Vent Free Fireplace 3. Place Log #3 by placing rectangular notch on bottom of log onto the rectangular protrusion on top of log #2. Place the other end of log #3 between the front grate and the small 'L' shaped bracket located on the right side of the burner. Allow the end of the log to rest on the burner. Figure 20 Log #3 Figure 20 Place Log #3 4. Place Log #4 by placing rectangular notch on bottom of log onto rectangular protrusion on front of log #2.
FLAME APPEARANCE Parlor Vent Free Fireplace Flames from the pilot, front and rear burner should be visually checked as soon as the heater is installed. In addition, periodically check the flames visually during operation. Check the pilot flame The pilot flame must always be present when the heater is in operation. It should just touch the top of the thermocouple tip for natural. Refer to Figure 22 for correct pilot flame.
OPERATING INSTRUCTIONS Parlor Vent Free Fireplace 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. Sooting and improper burning will result. During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents.
OPERATING INSTRUCTIONS Parlor Vent Free Fireplace WARNING 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 24. B. BEFORE OPERATING smell all around the appliance area for gas.
OPERATING INSTRUCTIONS Parlor Vent Free Fireplace 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 instructions for Match Lighting Instructions, Page 24. 4.
OPERATING INSTRUCTIONS and MAINTENANCE Parlor Vent Free Fireplace MATCH lighting instructions WARNING 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. After control knob has been released and pilot stays lit, reinstall any items that were removed for pilot access. 4.
WARNING TROUBLESHOOTING Parlor Vent Free Fireplace • Turn appliance OFF and allow to cool before servicing. NOTE: All troubleshooting items are listed in order of operation. • Only a qualified service person should service and repair the heater. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, there is no spark at ODS/pilot. 1. Ignitor electrode positioned wrong. 2. Ignitor electrode is broken. 3. Ignitor electrode not connected to ignitor cable. 4.
TROUBLESHOOTING WARNING Parlor Vent Free Fireplace 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 goes out when control knob is released. 1. Control knob not fully pressed in. 2. Control knob not pressed in long enough. 3. Manual shutoff valve not fully open. 4.
REPLACEMENT PARTS Parlor Vent Free Fireplace 15 14 3 16 13 7 8 9 2 6 5 6 4 10 11 1 12 PL20 Firebox Parts Description Qty. PL20NV PL20PV 900093 Complete Burner Assembly 1 90D0076 90D0095 PL20 parts Valve 1 14D0467 14D0468 3/16" Tubing Assy. 1 49D0050 49D0050 1/4" Tubing (2") 1 0125302 0125302 Pilot Regulator 1 14D0469 14D0469 Fitting for Regulator 2 20H0109 20H0109 5/16" Fitting 1 00K0917 00K0917 5/16" Ferrule 1 00K0918 00K0918 Valve Fitting 1 11V0313 11V0313 Piezo Wire Assy.
REPLACEMENT PARTS Parlor Vent Free Fireplace 1 2 4 3 PL20 LOGS Ref. 1. 2. 3. 4. 28 Description Log #1 Log #2 Log #3 Log #4 Qty.
OPTIONAL ACCESSORIES Parlor Vent Free Fireplace Firebrick Wood Surrounds Decorative Trim Front Remote Controls Firebricks Decorative Trim fronts Optional firebrick kits can be installed. Refer to installation instructions provided with kit or Page 12.
DECORATIVE FACE INSTALLATION Parlor Vent Free Fireplace INSTALLATION INSTRUCTIONS 1. Remove face from packaging. 2. Hold face securely on each side. 3. Place the four (4) hooked protrusions on the back of the face into the four (4) rectangular slots on the front of the unit. Two on each side. Figure 27 4. Firmly push down on top of face until the hooks bottom out with the slots on the unit.
Parlor Vent Free Fireplace LIMITED LIFETIME WARRANTY POLICY Lifetime Warranty The following components are warranted for life to the original owner, subject to proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate and Stainless Steel Burners. Five Year Warranty The following components are warranted for 5 years to the original owner, subject of proof of purchase: Ceramic Fiber Logs, Catalytic Filter and Aluminized Burners.
MHSC 149 Cleveland Drive • Paris, Kentucky 40361 www.mhsc.