Manual - Vermont Castings Group
Contents
1. CLEARANCE and HEIGHT REQUIREMENTS NBST27 Unvented Gas Log Set The dimensions shown in Figures 3 through 9 and defined in the fireplace manufacturer s instructions are minimum clearances to maintain when facing the front of the heater O Z Z lt installing this heater Left and right clearances are determined when When heater is installed into a ventless firebox minimum clearances as specified by the ventless firebox manufacturer must be met Follow these instructions carefully to ensure safe installation Failure to follow instructions exactly can create a fire hazard Sidewall and ceiling clearances The sides of the fire place opening must be at least 13 4 from any combustible wall The ceiling must be at least 42 from the top of the fireplace opening The wall parallel to the side of the heater must be at least 36 from the side of the heater Refer to your firebox Owners manual for more information 36 FP2363 Figure 3 Sidewall and Ceiling Clearances IMPORTANT 1 If installing unit into an unvented firebox minimum required clearances listed in the firebox installation manual must be met 2 If installing unit into a vented firebox with a working damper minimum clearances shown in Figure 8 through 10 must be met 3 Ifinstalling unit into a vented firebox with a damper that is always open no minimum clearances are required Heat resistant material minimum requirements with no wo2. while the vent free appliance is in operation This is an unvented gas fired heater It uses air oxygen from the room in which it is installed Provi sions for adequate combustion and ventilation air must be provided Refer to Page 5 This heater shall not be installed in a room or space unless the required volume of indoor combustion air is provided by the method described in the National Fuel Gas Code ANSI Z223 1 NFPA 54 the International Fuel Gas Code or applicable local codes Keep room area clear and free from combustible materials gasoline and other flammable vapors and liquids Unvented gas heaters are a supplemental zone heater They are not intended to be the primary heating appli ance NBST27 Unvented Gas Log Set 19 20 21 22 23 24 29 26 27 Unvented gas heaters emit moisture into the living area In most homes of average construction this does not pose a problem In houses of extremely tight construction additional mechanical ventilation is recommended During manufacturing fabricating and shipping various components of this appliance are treated with certain oils films or bonding agents These chemicals are not 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 four hou
3. ANSI Z223 I NFPA54 This unit complies with ANSI Z21 11 2 Unvented Heat ers latest edition and also complies with ANSI 221 60 Decorative Vented Appliances for Solid Fuel Burning Fireplaces latest edition State and local codes may only allow operation of this appliance in a vented con figuration Check your state or local codes For vented operation see Vented Instructions in this manual 81D3032 11 12 13 14 15 16 17 18 Do not install the heaters in a bathroom or bedroom Correct installation of the ceramic fiber logs proper location of the heater and annual cleaning are neces sary to avoid potential problems with sooting Sooting resulting from improper installation or operation can settle on surfaces outside the fireplace See log place ment instructions for proper installation Avoid any drafts that alter burner flame patterns Do not allow fans to blow directly into fireplace Do not place a blower inside burn area of firebox Ceiling fans may create drafts that alter burner flame patterns Sooting and improper burning will occur Caution Candles incense oil lamps etc produce combustion by products including soot Vent free appliances will not filter or clean soot produced by these types of products In addition the smoke and or aromatics scents may be reburnt in the vent free appliance which can produce odors It is recommended to minimize the use of candles incense etc
4. Gas Log Burner Assembly e Crushed Volcanic Rock 3 bags e Anchoring Screws 2 e Ceramic Fiber Logs e Rock wool e Flickering Bright Embers 1 bag e On Off Log Switch Assembly e Installation Operating Instructions The following options may be used with the milli volt con trolled heater These options are not packaged with the log set e Hand Held Remote with Receiver e Wall Thermostat with 15 Wire e Wall Switch with 15 Wire e Hand held Thermostat Remote with Receiver e Andirons Carefully inspect the contents for shipping damage If any parts are missing or damaged immediately inform the dealer from whom you purchased the appliance Do not attempt to install any part of the appliance unless you have all parts in good condition WHAT YOU WILL NEED FOR INSTALLATION You should have the following items available before pro ceeding with installation e External regulator for propane LPG and 1 2 Ib natural gas systems only e Piping which complies with local codes e Sediment trap recommended e Screwdriver e Tee joint e Pipe sealant approved for use with propane LPG Resistant to sulfur compounds e Drill with 5 32 masonry bit e Pipe wrench or appropriate size crescent wrench set e Manual shutoff valve 81D3032 NBST27 Unvented Gas Log Set GAS PRESSURES po Natural Propane LP Inlet Minimum Inlet Maximum Regulator Pressure Pilot Regulator 3 5 we o o o NOTE An external regulator is req
5. Vermont Castings Group will at its option replace or repair the defective components at no charge to the original owner Vermont Castings Group will also pay for reasonable labor costs incurred in replacing or repairing such components for a period of two years from the date of installation Any products presented for warranty repair must be accompanied by a dated proof of purchase This Limited Lifetime Warranty will be void if the appliance is not installed by a qualified installer in accordance with the installation instructions The Limited Lifetime Warranty will also be void if the appliance is not operated and maintained according to the operating instructions supplied with the appliance and does not extend to 1 firebox burner assembly damage by accident neglect misuse abuse alteration negligence of others including the installation thereof by unqualified installers 2 the costs of removal reinstallation or transportation of defective parts on the appliance or 3 incidental or consequential damage All service work must be performed by an authorized service representative 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 Vermont Castings Group does not assume for it any other obligations or liability in connection with the sale or use of the appliance In states that do not allow limitations on how
6. assembly Figure 20 Log 4 Figure 20 Place Log 3 4 Place log 4 by aligning the V notch on bottom of log with horizontal grate bar between tines as shown in Figure 21 Place the rectangular notch on bot tom of log onto the matching rectangu lar protrusion on log 1 Figure 21 Figure 21 Place Log 4 16 81D3032 LOG PLACEMENT NBST27 Unvented Gas Log Set 5 Place log 5 by placing rectangular notch on bottom of log onto matching rectangu lar protrusion on log 2 Make sure ember or burnt portion of log is facing center of burner Figure 22 Figure 22 Place Log 5 Continue on Side B valve on right as you face the fireplace O Place log 6 on pilot end of burner by aligning the V notch in bottom of log with the filler brack et surrounding the pilot Place the rectangular notch in the bottom of the log onto the rectangu lar protrusion on the end of log 1 Figure 23 Figure 23 Place Log 6 Control Valve 7 Place log 7 on left two 2 grate tines by aligning the V notch in log with grate tines Make sure groove on bottom of log is firmly seated on grate bar Figure 24 Figure 24 Place Log 7 81D3032 17 NBST27 Unvented Gas Log Set LOG PLACEMENT 8 Place log 8 by aligning V notch in bottom of log with the horizontal grate bar between tines as shown in Figure 25 Place the rect angular notch on bottom of log onto rectangular protrus
7. with a wooden mantel shelf or other combustible projection above first measure the heat resis tant material shown in Figure 5 then refer to Table B Figure 5 Measure Heat Resistant 8 or Material for Mantel More Hood of Heat Resistant Material Heater in Fire place or Firebox FP2365 Table B Heat Resistant Material Heights and Mantel Location Heat Resistant Material Measurement 12 or more Requirements for Safe Installation with Wooden Mantel Shelf or other Combustible Projection Hood not required Observe profile side elevations shown in Figure 6 8 to less than 12 Install hood and observer profiles shown in Figure 7 OR extend heat resistant material to at least 12 and observe profiles shown in Figure 6 Extend heat resistant material to at least 8 install hood and observe profiles shown in Figure 7 OR extend heat resistant material to at least 12 and observe profiles shown in Figure 6 Less than 8 Figure 6 Minimum Mantel Clearance with No Hood 10 or Less 28 gt 12 Min Heater in Fireplace or Firebox Heat Resistant Material Example The bottom of the mantel may project from the wall a maximum of 10 at a mini mum of 28 above the fire box FP2366 Figure 7 Minimum Mantel Clearance with Hood Heat Resistant Material 1 2 2V2 24 F 1 3 Hood Fireplace Heat
8. 9 6 Piezo Ignitor 1 14D0503 14D0503 7 Piezo Wire 1 OOK0632 OOK0632 8 On Off Switch 1 32D0232 32D0232 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 O Z Z lt S 81D3032 25 NBST27 Unvented Gas Log Set Description Part Number Flex Connector Flexcon 30 Wall Switch and Wire MVWS Wall Thermostat Kit WT On Off Remote RCB RCMT TLM WMTD Thermostat Remote RCST RCT TLT WWTD Remote Receiver Cover Ember RRCE Remote Receiver Cover Metal RRCM Log Switch with Wires ELSK Universal Andirons UAI9 Rock Wool EB RW Flickering Bright Embers FBE 1G 26 ACCESSORIES 81D3032 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 fitter 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 fireplace or vented gas log in the State of Massachusetts requires the damper to be permanently removed or welded in the fully open position In addition a naturally vented gas log may not be installed in a bedroom or bathroom in the State of Massachusetts Flex line installation must not exceed 36 inches and must have a T shutoff valve NOTE REGARDING VEN
9. ESTRICTIVE BARRIER 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 Some examples of barri ers are glass screen door frames and sunken recessed fireplaces Height of Restriction x Minimum Depth of Fireplace Firebox No Restriction 21 1 2 to 1 254 Greater than 112 to 3 214 Greater than 3 Any barrier greater than 3 placed in front of the gas log set is not recommended by the manufacturer NOTE Non combustible material such as refractory brick may be used to line the floor of the fireplace in order to raise the height of the gas log set in relation to a restrictive barrier lf the unit is raised the minimum height dimension listed in the homeowner s manual must not be exceeded NOTE If the log set is equipped with a remote receiver a restrictive barrier may reduce the battery life by increasing the ambient temperature inside the fireplace Placement of the receiver outside of the fireplace will extend the battery life Glass door frames with adjustable louvers should have the louvers fully open while the unit is in operation y 4 FP2362 Height of restrictive barrier gt caused by glass door frames Refer to recessed fireplaces etc from the base or bottom surface of the unit Refer to Table Net Figure 2 Reference Drawing of NBST27 Log Set in an Enclosure 81D3032
10. T FREE PRODUCTS This product must be installed by a licensed plumber or gas fitter when installed within the Commonwealth of Massachusetts In addition vent free products may not be installed in a bedroom or bathroom regardless of size or type in the State of Massachusetts Flex line installation must not exceed 36 inches and must have a T shutoff valve CARBON MONOXIDE DETECTOR REQUIREMENTS 2 Revise 10 8 3 by adding the following additional requirements a For all side wall horizontally vented gas fueled equipment installed in every dwelling building or structure used in whole or in part for residential purposes including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven 7 feet above finished grade in the area of the venting including but not limited to decks and porches the following requirements shall be satisfied 1 Installation of carbon monoxide detectors At the time of installation of the side wall horizontal vented gas fueled equipment the installing plumber or gas fitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back up is installed on the floor level where the gas equipment is to be installed In addition the installing plumber or gas fitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling building or structure serve
11. abel all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing O Z Z lt The Millivolt valve is a self powered combination gas con trol THAT DOES NOT REQUIRE 110VAC TO OPERATE ODS Pilot ON OFF Switch or Optional Wall Switch Remote or T Stat Millivolt Valve Figure 14 Wiring Diagram Log Switch l NOTE Log switch wires are not fac Ss tory connected Connect log switch wires to the TH TP and TH valve terminals CONNECTING OPTIONAL WALL SWITCH OR THERMOSTAT 1 Use 18 awg two wire cable 15 feet maximum length 2 Atone end of the cable connect both wires to the wall switch or thermostat At the other end connect one wire to TP TH and one wire to TH or connect the wall switch thermostat to the two male 0 25 terminals on the left side of the unit The color of the wires does not matter 81D3032 13 NBST27 Unvented Gas Log Set CONNECT REMOTE RECEIVER 1 Set remote receiver Refer to instructions included in the receiver kit 2 Connect the two 20 1 4 female connectors to the TP TH and TH terminals on the control valve Do not allow wires to touch grate of burner NOTE Heat reduces battery life Protect the receiver and extend battery life by mounting receiver in wall or other location outside the fireplace CHECKING SYSTEM OPERATION The millivolt system and individu
12. acement PERIODIC CLEANING Refer to parts diagram for ANNUAL CLEANING INSPECTION Refer to parts location of items discussed below diagram for location of items discussed below e Do not use cleaning fluid to clean logs or any part of e Inspect and clean burner air intake holes Remove heater lint or particles with vacuum brush or pipe clean e Brush logs with soft bristle brush or vacuum with ers brush attachment Failure to keep air intake holes clean will result e Vacuum loose particles and dust from the front and in sooting and poor combustion rear burner control and piezo covers and grate weld e Inspect and clean all burner ports ment e Inspect ODS pilot for operation and accumulation of e Inspect and clean burner air intake holes Remove lint at air intake holes lint or particles with vacuum brush or pipe clean e Verify flame pattern and log placement for proper ers Failure to keep air intake holes clean will operation result in sooting and poor combustion e Verify smooth and responsive ignition of main burner e External case should be dusted and wiped with a and rear burner wet soapy cloth e Replace battery in remote control device 22 81D3032 TROUBLESHOOTING NBST27 Unvented Gas Log Set NOTE All troubleshooting items are listed in order of operation Turn off heater and allow to cool before cleaning Disconnect electrical power before cleaning or servicing Possible Cause Solution When ignitor butto
13. al components may be checked with a millivolt meter having a 1 1000 mV range Conduct each check shown in chart by connecting meter test leads to terminals as indicated Switch or Thermostat Contacts Connect Meter Leads To Terminals Check Test To Test ELECTRICAL WIRING MILLIVOLT A Complete Millivolt System Check A Reading Thermostat contacts CLOSED Control knob ON Main burner should turn ON 1 If reading is more than 175 millivolts and the au tomatic valve still does not come on replace the control 2 If the closed circuit reading A reading is less than 175 millivolts determine cause for low read ing proceed to Section B B Thermopile Output Reading Check B Reading thermostat contacts OPEN Main burn er OFF 1 Check gas pressure to the unit If gas pressure is within minimum and maximum on data plate then check pilot voltage 500 millivolts minimum If the minimum millivolt reading is not obtainable replace pilot Meter Reading Should Be system Thermopile 1 amp 2 Open Minimum 500 Output Remote Wires Remote Receiver Figure 15 Install Remote Receiver 14 Remote Wire Connectors 81D3032 LOG PLACEMENT NBST27 Unvented Gas Log Set The positioning of the logs is critical to the safe and clean operation of this heater Sooting and other problems may result if the logs are not properly and firmly positioned in the appliance Never ad
14. castings GROUP Unvented Gas Log Heater or Vented Decorative Appliance Installation Instructions Model NBST27 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 e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e 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 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 5 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 INSTALLER Leave this manual with the appliance appliance is not convertible for use with other CONSUMER Retain this manual for future reference 81D3032 3 13 Rev 6 NBST27 Unvented Gas Log Set Imp
15. cinces nceutincoamenccadaneacenons 16 Flame Appearance ccccccesceseeseeeeeeeeeeeeseneees 19 Pilot FING a ccpersase agencies visi vieonantioeteneanesmienniepraean 19 Burner Flame iatacinnnincireadansncmwnssisiereimnntanmnevansns 19 Operating Instructions ccccceseeeeeeeeeeeeeees 20 For Your Safety Read Before Lighting 20 Millivolt Control Lighting Instructions 21 To Turn Off Gas to Heater ccceceeeeeeee 21 Match Lighting Instructions c ceee 22 Maintenance ccccscceeeeeeeeeeeseseeeeeeeeneeneeeneenes 22 Troubleshooting sacs cennsinicndseitnsinecinnescicnctnsnancnnincaivncas 23 Replacement Parts ccccccseeseeeeeeeeeeeeseneees 25 PAC COS SOMES ieia a a 26 Requirements in Massachusetts 005 27 Wa Y re EEE E 28 81D3032 IMPORTANT SAFETY INFORMATION INSTALLER Please leave these instructions with the appliance IMPORTANT Read these instructions carefully before installing or trying to operate this vent free gas heater WARNING 8 10 NBST27 Unvented Gas Log Set OWNER Please retain these instructions for future reference 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 patter
16. d additional logs or embellishments such as pine cones vermiculite or rock wool to the heater Only use the logs and rock wool EB RW and flickering embers FBE 1G supplied with the unit Failure to position the parts in accordance with diagrams below or to use only parts specifically approved for this heater may result in property damage or personal injury WARNING Before you begin This unit is supplied with 10 ceramic fiber logs Do not handle the logs with 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 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 new burning logs and or rock wool 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 CAUTION ROCK WOOL and EMBER PLACEMENT 1 Place dime size pieces of rock wool evenly over small burner ports starting at pilot and down each side of burner Avoid placing rock wool on slots on either side of burner between the air defectors Figure 16 Wash hands after placing rock wool Skin irritation may oc 2 Place flickering bright embers FBE 1G before plac ing logs on burner Pull embers apart into small stran
17. d by the side wall horizontal vented gas fueled equipment It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors a In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic the hard wired carbon monoxide detector with alarm and battery back up may be installed on the next adjacent floor level b In the event that the requirements of this subdivision can not be met at the time of completion of installation the owner shall have a period of thirty 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 81D3032 2 Approved Carbon Monoxide Detectors Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI UL 2034 listed and IAS certified 3 Signage A metal or plastic identification plate shall be permanently mounted to the exterior of the building 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 The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 Inspection The sta
18. de the parts for venting the flue gases but identifies special venting systems the following requirements shall be satisfied by the manufacturer 1 The referenced special venting system instructions shall be included with the appliance or equipment installation instructions and 2 The special venting systems shall be Product Approved by the Board and the instructions for that system shall include a parts list and detailed installation instructions e A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment all venting instructions all parts lists for venting instructions and or all venting design 27 LIMITED LIFETIME WARRANTY POLICY LIFETIME WARRANTY The following components are warranted for life to the original owner subject of 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 pur chase Vent Free Ceramic Fiber Logs and Aluminized Burners BASIC WARRANTY Vermont Castings Group warrants the components and materials in your gas appliance to be free from manufacturing and material defects for a period of two years from date of installation After installation if any of the components manufactured by Vermont Castings Group in the appliance are found to be defective in materials or workmanship
19. ds and place on top of existing rock wool on both sides of Pilot ane burner from the air deflectors to the end of each burner Rockwool Horizontal where they can be seen Try to avoid stacking these aa embers on top of each other Use smaller strands for maximum effect Use as much as needed to achieve desired effect Figure 17 r ey JY fe r Jp te Rock Wool Grate Tines Figure 16 Horizontal Place Rock Wool Grate Bar A at i a rate eee eet Oona aw al ese i LG649 Rock wool Flickering Bright Embers Figure 17 Place Flickering Bright Embers 81D3032 15 NBST27 Unvented Gas Log Set LOG PLACEMENT Log 1 LOG PLACEMENT Begin on Side A valve on left as you face the fireplace Figure 18 Place Log 1 1 Place log 1 on burner by aligning two 2 holes on bot tom of log with two 2 pins Control on burner The tallest part of V V the log is on the valve side of burner Gently push log down until it comes in contact with burner surface Figure 18 2 Place log 2 on left grate tines by aligning the V notches in the log with grate tines The groove on the bottom of the log should be firmly seated on the grate bar Figure 19 LG651 Figure 19 Log 2 Place Log 2 3 Place log 3 on farthest right grate tine by aligning the V notch in log with grate tine The groove in the bottom of the log should sit on the filler bracket surrounding the pilot
20. el Make sure the manual shutoff valve is fully open 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 22 Turn gas control knob clockwise to the OFF position and turn ON OFF switch to OFF position Wait 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow the instructions under What To Do If You Smell Gas Page 20 From OFF position turn the gas control knob counterclockwise to IGN position Push in control knob for 5 seconds NOTE If you are running the heater for the first time it may be necessary to press in the control knob for 30 seconds or longer to allow air to bleed out of the gas piping With the control knob pushed in push in and release the piezo ignitor button to light the pilot Continue pushing the control knob in for a further 60 seconds to prevent the flame detector from shut ting off the gas while the probe is warming up Release the control knob Turn gas control knob counterclockwise to the ON position 10 After the pilot has been lit for one minute the burners can be turned on Turn the ON OFF switch to 11 1 2 3 ON position If the gas logs will not operate follow the instructions To Turn Off Gas To Heater below and call your service technician or gas supplier On Off Pilot Kn
21. er and call qualified service person Heater produces a whis 1 Turning control knob to HIGH posi 1 Turn control knob to LOW position and tling noise when burner is tion when burner is cold let warm up for a minute lit 2 Air in gas line 2 Operate burner until air is removed EE from line Have gas line checked by lo cal gas company 3 Dirty or partially clogged burner orifices 1 LP regulator shut down due to inlet 1 Verify LP tank regulator is installed and pressure too high set at 11 to 13 w c 2 Replace regulator on heater Logs appear to smoke after initial operation No gas to pilot 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 O Z Z lt 24 81D3032 REPLACEMENT PARTS NBST27 Unvented Gas Log Set Ref Description Qty NBST27NV NBST27PV 1 Complete Log Set 1 81D3051 81D3051 1a Log 1 1 81D3034 81D3034 1b Log 2 1 81D3035 81D3035 1c Log 3 1 81D3036 81D3036 1d Log 4 1 81D3037 81D3037 1e Log 5 1 81D3038 81D3038 1f Log 6 1 81D3039 81D3039 1g Log 7 1 81D3040 81D3040 1h Log 8 1 81D3041 81D3041 1i Log 9 1 81D3042 81D3042 1j Log 10 1 81D3043 81D3043 2 Burner 1 81D3017 81D3027 3 Control Valve 1 14D0467 14D0468 4 ODS Pilot Assembly 1 20303785K 20303786K 0 Pilot Regulator 1 14D046
22. er in or Firebox FP2367 Example A mantel may project from the wall a maximum of 21 2 at a minimum of 13 above the opening and a maximum of 12 at a minimum of 24 above the opening 81D3032 FLOOR CLEARANCES NBST27 Unvented Gas Log Set The gas log heater must be installed at least 3 4 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 Figure 8 OR Heater in Fire place or Firebox Combustible Material FP2368 Figure 8 Minimum Clearance above Combustible Flooring The gas log heater may be installed nearer to the floor if a minimum of 14 of noncombus tible material such as slate or marble is installed between the base of the fireplace and the combustible flooring Figure 9 Heater in Fireplace or Firebox Combustible Material This Distance may now be Less Than 3 4 7 my 14 Min Figure 9 Minimum Clearance above Combustible Flooring with Noncombustible Material Installed at Base of Fireplace 81D3032 9 NBST27 Unvented Gas Log Set by a qualified chimney cleaner WARNING FIREPLACE PREPARATION Before installing in a solid fuel burning fireplace The chimney flue and firebox must be cleaned of soot creosote ashes and loose paint This appliance is for installation onl
23. ge or sooting Use a heat resistant sealant Do not seal chimney flue damper Install and operate the appliance as directed in this manual 10 DAMPER STOP INSTALLATION A damper stop must be provided with the unit when used for vented applications Contact your dealer to obtain one The damper stop must be installed as shown in Figure 10 to prevent full closure of the fireplace damper blade and provide a minimum 29 square inch flue opening Refer to Page 27 for installations in the Commonwealth of Massachusetts Damper Stop FP2370 Damper Figure 10 Damper Stop Installation Refer to WARNING at top of page 81D3032 VENTED APPLICATION INSTALLATION SECURE APPLIANCE NBST27 Unvented Gas Log Set 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 reposi tion 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 WARNING You must secure the gas log heater to the fireplace floor If not the entire unit may move when you adjust the controls Movement of unit may cause shifting of the logs which leads to sooting and improper burning Grate movement could cause a gas leak Special care is required if you are installing the unit into a sunken fireplace You must raise the fireplace floor to allow access to gas log con
24. instruction exactly a fire or explosion may result causing property damage personal injury or loss of life gt WARNING This appliance is equipped with a piezo ignition device which lights the pilot If piezo is not working properly see Match Lighting Instructions Page 22 BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor OO WHAT TO DO IF YOU SMELL GAS e Do not attempt to light any appliance e Do not touch any electric switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas supplier call the fire department Control Knobs Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it Call a qualified service technician Force or attempted repair may result in a fire or explosion Do not use this appliance if any part of it has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control that has been under water Figure 31 Burner Controls 20 81D3032 OPERATING INSTRUCTIONS NBST27 Unvented Gas Log Set f 8 g MILLIVOLT CONTROL LIGHTING INSTRUCTIONS STOP Read the safety information lab
25. ion and unless other provisions for combustion air are provided the screen must have an opening s for induction of combustion air IMPORTANT SAFETY INFORMATION Never connect unit to private non utility gas wells This gas is commonly known as wellhead gas O Z Z lt z NATIONAL We recommend that our gas INSTITUTE hearth products be installed S 4 and serviced by profes sionals who are certified in the U S by the National Fireplace Institute NFI as CERTIFIED NFI Gas Specialists www nficertified org MASSACHUSSETTS RESIDENTS ONLY Refer to Page 27 for additional information CODES Adhere to all local codes or in their absence the latest edition of THE NATIONAL FUEL GAS CODE ANSI 2223 1 or NFPA54 which can be obtained from American National Standards Institute Inc 1430 Broadway New York NY 10018 Or National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 NBST27 Certified To ANSI Z221 11 2 Latest Editoin Unvented Heaters amp 221 60 Latest Edition CSA 2 26 Latest Edtion 81D3032 GETTING STARTED FEATURES and SPECIFICATIONS Gloves are recommended when handling ceramic fiber logs to prevent skin irritation from loose fibers Logs are fragile handle with care O Z Z lt 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 e Unvented
26. ion on middle of log 1 Figure 25 Figure 25 Place Log 8 Log 8 Log 9 9 Place log 9 on farthest right grate tine by aligning V notch in bottom of log with grate tine Place rectangular notch in bottom of log onto rectangular protru sion on log 8 Figure 26 Figure 26 Place Log 9 Log 10 10 Place log 10 by aligning two 2 rectangular notches on bottom of log with rectangular pro trusions on logs 6 amp 7 Make sure the ember or burnt area of log is facing center of burner Figure 27 Figure 27 pee Place Log 10 18 81D3032 FLAME APPEARANCE NBST27 Unvented Gas Log Set 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 28 for correct pilot flame If the pilot flame does not touch the thermocouple then the main burner cannot function reliably Figure 29 for incorrect shape of pilot flame Thermocouple for Natural Gas e T ag lt Natural Gas l Thermocouple for LP Thermocouple for LP FP2273 Figure 29 Figure 28 PARIA Incorrect Pilot Flame Appearance Correct Pilot Flame Appearance CHECK BURNER FLAME APPEARANCE In normal operation at full rate after 15 min
27. ional Fuel Code section 2 6 3 providing gas will occur if the pipe is too small O Z Z lt 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 Undue pressure loss A manual shutoff valve must be installed upstream of the appliance Union tee and plugged 1 8 NPT pressure tapping point should be installed upstream of the appliance Figure 12 NOTICE A qualified gas appliance installer must connect the heater to the gas supply Consult all local codes IMPORTANT Hold heater valve firmly with a wrench to prevent movement when connecting to inlet pipe Always use an external regulator for all propane LPG heaters and high pressure one to two pound systems only to reduce the supply tank pressure to a maximum of 13 w c This is in addition to the internal regulator in the heater valve Stainless Flex ible Tube Pipe or Metal Tube Pipe Possible Locations for Pressure Tap ping Point To Heater Valve Gas Pipe Coupling ae nle Manual Shut off Valve Figure 12 i FP2371 Gas Connection CHECK GAS TYPE The gas supply must be the same as stated on the heater s rat ing plate If the gas supply is different DO NOT INSTALL THE HEATER Contact your dealer for the correct model WARNING Connecting directly to an unregulated pro pane LPG tan
28. k can cause an explosion O Z Z lt S 12 The heater gas inlet connection is a female 3 8 NPT at the valve The inlet connection is on the right side of unit when facing the control To connect from the opposite side rotate unit 180 or route the pipe under the rear portion of the unit When tightening the joint to the valve hold the valve securely to prevent movement Test all gas connection 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 MILLI VOLT VALVE CONTROL Figure 13 The valve regulator controls the burner pressure which should be checked at the pressure test point Turn captured screw counter clockwise two or three turns and then place tubing to pressure gauge over test point Use test point OUT closest to control knob After taking pressure reading be sure and turn captured screw clock wise firmly to re seal Do not over torque Check for gas leaks Repeat process for IN port Check IN port with unit set on high with any other gas appliances in the house on or cycling on Pressure gauge readings should match max min requirements on data plate Test Port OUT Figure 13 Pressure Test Point Location Millivolt Control 81D3032 ELECTRICAL WIRING MILLIVOLT NBST27 Unvented Gas Log Set L
29. long an implied warranty lasts or do not allow exclusion of indirect damage those limitations of exclusions may not apply to you You may also have additional rights not covered in this Limited Lifetime Warranty Vermont Castings Group reserves the right to investigate any and all claims against the Limited Lifetime Warranty and decide upon method of settlement IF WARRANTY SERVICE IS NEEDED 1 Contact your supplier Make sure you have your warranty your sales receipt and the model serial number of your Vermont Castings Group product Vermont Castings Group 149 Cleveland Drive Paris Kentucky 40361 www vermontcastingsgroup com
30. n is 1 Ignitor electrode positioned wrong 1 Replace ignitor pressed there is not spark 2 Ignitor electrode is broken 2 Replace ignitor at ODS pilot 3 Ignitor electrode not connected to 3 Reconnect ignitor cable ignitor cable ignitor cable dry metal or tubing wanted odors paint hair spray glues etc ing products while heater is running 3 Initial burn off 3 Ventilate room and turn unit on high until odor is gone Odor should be gone after 6 hours of continuous use use ODS pilot to operate tion 4 Defective thermopile 4 Check wire connections Check output should be 500 mV across TH TP and TP terminals with ON OFF switches off 5 Restrictions in incoming air flow 5 Check for bottom riser on glass door sunken fireplace excessive lava rock cinders densely packed against grate Gas odor even when 1 Gas leak 1 Locate and correct all leaks control knob is in OFF 2 Control valve defective 2 Replace control valve position When ignitor button is 1 Gas supply turned off or manual 1 Turn on gas supply or open manual pressed there is spark at shutoff valve closed shutoff valve ODS pilot but no ignition 2 Control knob not in PILOT position 2 Turn control knob to PILOT position 3 Control knob not pressed in while in 3 Press in control Knob while in PILOT PILOT position position 4 Air in gas lines when installed 4 Continue holding down control knob ee Repeat igniting operation un
31. ns Do not use a blower insert heat exchanger insert or other accessory not approved for use with this heater where applicable Due to high temperatures the appliance should be located out of traffic and away from furniture and draperies Children and adults should be alerted to the hazard of high surface temperature and should stay away to avoid burns or clothing ignition Young children should be carefully supervised when they are in the same room with the appliance Do not place clothing or other flammable material on or near the appliance Any safety screen or guard removed for servicing an appliance must be replaced prior to operating the heater Installation and repair should be done by a qualified service person To prevent malfunction and or sooting an unvented gas heater should be cleaned before use and at least annually by a professional service person More frequent cleaning may be required due to excessive lint from carpeting bedding material etc It is imperative that control compartments burners and circulating air passageways be kept clean CARBON MONOXIDE POISONING Early signs of carbon monoxide poisoning are similar to the flu with headaches dizziness and or nausea If you have these signs obtain fresh air immediately Have the heater serviced as it may not be operating properly The installation must conform with local codes or in the absence of local codes with the National Fuel Gas Code
32. ob Hi Lo Switch Figure 32 Pilot Figure 33 Controls Piezo Ignitor TO TURN OFF GAS TO HEATER Turn control knob clockwise to OFF position to completely shut off the heater If applicable Turn ON OFF switch to OFF position and or set thermostat if present to lowest setting If applicable Turn off all electric power to the heater 81D3032 1 NBST27 Unvented Gas Log Set OPERATING INSTRUCTIONS and MAINTENANCE MATCH LIGHTING INSTRUCTIONS Remove any items necessary for easy access to the pilot for example logs screens etc 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 After control knob has been released and pilot stays lit reinstall any items that were removed for pilot access Call a qualified service technician for repair or replacement of the piezo ignitor Turn off heater and allow to cool before cleaning Disconnect electrical power before cleaning or servicing WARNING CLEANING AND SERVICING Annual inspection and cleaning by your dealer or qualified service technician is recommended to prevent malfunction and or sooting Remove logs handling carefully by holding gently at each end Gloves are recommended to prevent skin irritation from ceramic fibers If skin becomes irritated wash gently with soap and water Refer to manual for correct log pl
33. oden mantel or other combustible projection 81D3032 To install the gas logs into a fireplace with no wooden mantel shelf or other combustible projection above the fireplace opening measure the heat resistant material height per Figure 4 then see TABLE A Heat resistant materials such as slate and marble must be at least 1 2 thick Sheet metal should not be installed onto combustible material IMPORTANT lf the unit is installed in a vented fireplace and cannot meet these minimum clearances you must operate the heater with chimney flue damper open Refer to Installing Vented Applications on Page 11 Heat Resistant Material Figure 4 Measure Heat Re Measure This sistant Material Distance 1 1 Heater in Fireplace or Firebox FP2364 Table A Heat Resistant Material Requirements with no Mantel or Combustible Projection Material Requirements for Measurement Safe Installation Hood not required Heat Resistant 8 to less than 12 Extend heat resistant material to 12 or install hood Figure 4 Less than 8 Extend heat resistant material to at least 8 and install hood Figure 4 OR extend heat resistant material to a height of at least 12 NBST27 Unvented Gas Log Set CLEARANCE and HEIGHT REQUIREMENTS Heat resistant material minimum requirements with wooden mantel or other combustible projection To install the heater
34. only in a solid fuel burning masonry or UL127 O Z Z lt S gas logs Use the fireplace manufacturer s installation and clear ance requirements as defined in their manual The NBST27 unvented room heater is approved for instal lation into the following unvented fireplaces VF Series Fireboxes GPF36 GSTF36 GRCF36 GLCF36 LSTF36 LPF36 LRF36 LLF36 The NBST27 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 N 21 K FP2361 a DN Figure 1 ONS Hearth Minimum Dimensions for Solid Fuel Burning Fireplaces and UL127 Factory Built Fireplaces Barriers such as the bottom of a glass door frame placed in front of a gas log set can change the air flow characteristics of the fireplace which in turn can cause the unit to overheat and malfunction O Z Z lt factory built fireplace vent free appliance or in listed ventless firebox enclosure It has been design certified for these installations Exception DO NOT install this appliance in a factory built fireplace that includes instructions stating it has not been tested or should not be used with unvented IMPORTANT INFORMATION FOR THE INSTALLATION OF THIS GAS LOG SET PLACEMENT IN A FIREPLACE WITHA R
35. ortant Safety Information cccceeee 3 OSS aaa AE E sees tena eece AEE A T 4 Getting Started cccccceecceeeeeeeeeeeeeeeeeesenesenenenes 5 Product Features and Specifications 5 Gas PIeSSUIES ccccceeeecceeeeeeeeeeeeeeeeeneeeeees 5 Gas Specifications cccccecccecceeeseeeeeeeeeeeees g Ignition CON IFON Sis seiariceetccneeassedacoteosceenerwacunceeeators 5 Pilot ODS spretorsetrsesnegincestannnnetadenenneetsiantenesdaautatataniconnaan 5 Thermal Generator cccceceeeceeeeeeeeeeeeees 5 General Installation Information 2 008 6 Fireplace and Hearth Dimensions 005 6 Placement in a Fireplace with a Restrictive Bar E E TE AAE A sale anetenualesteqaen a AE 6 Clearances and Height Requirements 7 Floor Clearance sascaicnsemneuteneentnimieieatinecieoiaeds 9 Fireplace Preparation cccccsecseeseeeeeeneees 10 Installing Vented Applications 08 10 Gas Line COnne ction ccccccccsseseeeeeeseeeenenees 12 EW o i E EE E E 12 CONTENTS Electrical Wiring Millivolt seeeeeeeees 13 Optional Wall Switch or Thermostat 13 Remote Receiver ccccccseeceeeeeeeeeeeeeeeees 14 Checking System Operation cc 006 14 Log PIAC SINGING xcs cites cterccnicnita tee nietccnteinnenessiedi 15 Rockwool and Ember Placement 15 Log IF FACE MGM ss feces sae
36. rs to properly cure logs and rock wool with the burner at the highest setting Provide maximum ventilation by opening windows or doors to allow odors to dissipate Any odors remaining after this initial break in period will be slight and will disappear with continued use Input ratings are shown in BTU per hour and are for elevations up to 2 000 feet For elevations above 2 000 feet input ratings should be reduced 4 percent for each 1 000 feet above sea level Refer to the National Fuel Gas Code The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pres sures in excess of 1 2 psig 3 5 kPa The appliance must be isolated from the gas supply piping system by closing its equipment shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 psig 3 5 kPa Do not use this room heater if any part has been under water Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water 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 Never burn solid fuels in a fireplace where a unvented room heater is installed Always have a fireplace screen in place when the appliance is in operat
37. te or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5 08 2 a 1 through 4 b Exemptions The following equipment is exempt from 248 CMR 5 08 2 a 1 through 4 1 The equipment listed in Chapter 10 entitled Equipment Not Required To Be Vented in the most current edition of NFPA 54 as adopted by the Board and 2 Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling building or structure used in whole or in part for residential purposes c Manufacturer requirements Gas Equipment Venting System Provided When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with the equipment the instructions provided by the manufacturer for installation of the equipment and the venting system shall include 1 Detailed instructions for the installation of the venting system design or the venting system components and 2 Acomplete parts list for the venting system design or venting system d Manufacturer requirements Gas Equipment Venting System Not Provided When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provi
38. til air is removed services 6 Gas regulator setting is not correct 6 Check incoming pressure Replace gas regulator WARNING 81D3032 23 NBST27 Unvented Gas Log Set TROUBLESHOOTING Problem Possible Cause Solution ODS pilot lights but flame knob is released enough knob pressed in for 30 seconds 4 Hand tighten thermocouple connection control valve until snug then tighten 1 4 turn more 5 Pilot flame not touching thermocou 5 Contact local gas company ple which allows thermocouple to cool causing pilot flame to go out This problem could be caused by either low gas pressure or a dirty or partially clogged ODS pilot 6 Thermocouple damaged 6 Replace thermocouple 7 Control valve damaged 7 Replace control valve Burner does not light after 1 Burner orifice is clogged Clean burner or replace burner orifice eDsiplon seit Burner backfires during 2 Burner orifice is clogged 2 Clean burner or replace burner orifice 1 Burner orifice is clogged or dam 1 Clean burner or replace burner orifice Slight smoke or odor dur aoed Mia operau 2 Burner is damaged 2 Replace burner 3 Gas regulator is defective 3 Replace gas regulator 1 Vapors from paint or curing process 1 Problem will stop after a few hours of logs of operation Run the heater with the damper open if you have one or open a window for the first few hours 2 Log heater is intended to be smoke less Turn OFF heat
39. trols This will insure adequate air flow and guard against sooting Raise the fireplace floor using noncombustible materials as described in Placement in a Fireplace with Restrictive Barrier section WARNING PLACE and SECURE APPLIANCE 1 Center the gas log unit in the fireplace or firebox Make certain the front feet of the grate sit inside the front edge of the fireplace or firebox 2 Anchor holes are located on the right and left sides of the unit After centering the grate correctly mark the hole locations on the fireplace firebox floor Drill two 2 5 32 diam eter holes approximately 11 2 deep 3 Anchor the unit to the fireplace firebox floor using the screws provided Figure 11 Proper installation of the grate is essential to prevent any movement of the logs and con trols during operation RIGHT CORNER APPLICATIONS For right corner installations the piezo ignitor can be moved to the opposite corner of the ap pliance Figure 11 PS Secure Burner Remove wire from back of ignitor Remove two 2 screws holding piezo brack et Reattach bracket on the opposite corner where inlet fuel comes into the valve by us ing two clearance holes on burner base Piezo Ignitor Original Location Reattach wire to ignitor 81D3032 11 NBST27 Unvented Gas Log Set GAS LINE CONNECTION Use new black iron or steel pipe Internally tinned copper or copper tubing can be used per Nat
40. uired to reduce supply pres sure to a maximum of 13 w c GAS SPECIFICATIONS Fes Max Input Min Input Model Fuel Control BTU h_ BTU h Nat IGNITION CONTROLS Piezo ignitor allows ignition of the pilot without the use of matches or batteries Millivolt control has four 4 positions OFF All gas to the gas logs is shut off at the valve IGN Valve position to light maintain a standing pilot ON Valve position to turn ON OFF log set with remote switch thermostat LOW HI Variable position to control flame height heat output PILOT ODS The gas log heater is fitted with a specially designed safety pilot ODS assembly which senses the amount of oxygen available in the room and shuts the gas log heater off if the oxygen level begins to drop below a satisfactory level The pilot can only be relit when adequate fresh air is available THERMAL GENERATOR The millivolt gas log pilot is fitted with a milli volt thermo pile generator to provide power for remote activation If the area in which the heater may be operated does not meet the required volume for indoor combustion air combustion and ventilation air shall be provided by one of the methods described in the National Fuel Gas Code ANSI Z223 1 NFPA 54 the International Fuel Gas Code or applicable local codes O Z Z lt S NBST27 Unvented Gas Log Set FIREPLACE and HEARTH DIMENSIONS This appliance is for installation
41. utes the flames should appear as shown in Figure 30 The flames should be yellow and extend 3 4 above the log top surfaces The yellow flames should not impinge on the logs Figure 30 Correct Burner Flame Appear ance 81D3032 19 NBST27 Unvented Gas Log Set OPERATING INSTRUCTIONS 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 These chemicals are not 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 four hours with the burner at the highest setting Provide maxi mum ventilation by opening windows or doors to allow odors to dissipate Any odors remaining after this initial break in will be slight and will disappear with continued use 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 FOR YOUR SAFETY READ BEFORE LIGHTING If you do not follow these
42. y in a solid fuel burning fireplace masonry fireplace or manufactured fireplace with a working flue and constructed of noncombustible material WARNING a vented log set Exception DO NOT install this appliance in a factory built fireplace that includes instructions stating that it has not been tested or should not be used with unvented gas logs This log set may be installed as This log set may be installed as a vented log set BEFORE FULLY INSTALLING THE UNIT e Turn OFF the gas supply to the fireplace or firebox e 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 Use a heat resistant sealant Do not seal the chimney flue damper INSTALLING VENTED APPLICATIONS Milli volt controlled gas logs may be installed as a vented decorative log set in compliance with ANSI Z21 60 and National Fuel Gas Code Section 6 6 Since the gas logs are operated with the damper open noncombustible material and minimum mantel requirements do not apply BEFORE INSTALLING THE APPLIANCE e Turn off gas supply to fireplace or firebox e Have the fireplace floor and chimney professionally cleaned to remove ashes soot creosote or other obstructions Have this cleaning performed annually after installation e Seal any fresh air vents or ash clean out doors located on floor or wall of fireplace If not drafting may cause pilot outa
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