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Vermont Castings NBST27 Installation Instructions Manual

Unvented gas log heater or vented decorative appliance
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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
• 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.
This appliance may be installed in an
a f t e r m a r k e t , p e r m a n e n t l y l o c a t e d ,
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.
NBST27
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 5.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
81D3032 3/13 Rev. 6

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Summary of Contents for Vermont Castings NBST27

  • Page 1: Installation Instructions

    Unvented Gas Log Heater 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.

  • Page 2: Table Of Contents

    CONTENTS NBST27 Unvented Gas Log Set Important Safety Information ......3 Electrical Wiring (Millivolt) ........13 Codes .............4 Optional Wall Switch or Thermostat .....13 Remote Receiver ..........14 Getting Started .............5 Checking System Operation ......14 Product Features and Specifications ....5 Log Placement ...........15 Gas Pressures ..........5...

  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION NBST27 Unvented Gas Log Set OWNER INSTALLER Please retain these instructions for future reference. Please leave these instructions with the appliance. IMPORTANT Read these instructions carefully before installing or trying to operate this vent-free gas heater. •...

  • Page 4: Codes

    NBST27 Unvented Gas Log Set IMPORTANT SAFETY INFORMATION 19. Unvented gas heaters emit moisture into the living area. In most homes of average construction, this Never connect unit to private (non-utility) does not pose a problem. In houses of extremely gas wells.

  • Page 5: Getting Started

    GETTING STARTED - FEATURES and SPECIFICATIONS NBST27 Unvented Gas Log Set GAS PRESSURES Gloves are recommended when handling ceramic fiber logs to prevent skin irritation Natural *Propane (LP) from loose fibers. Inlet Minimum 5.0” w.c. 11.0” w.c. Logs are fragile - handle with care.

  • Page 6: General Installation Information

    INSTALLATION OF THIS GAS LOG SET ance requirements as defined in their manual. PLACEMENT IN A FIREPLACE WITH A The NBST27 unvented room heater is approved for instal- RESTRICTIVE BARRIER lation into the following unvented fireplaces: The following are guidelines for placing a gas log set in...

  • Page 7: Clearances And Height Requirements

    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 installing this heater. Left and right clearances are determined when facing the front of the heater.
  • Page 8 CLEARANCE and HEIGHT REQUIREMENTS NBST27 Unvented Gas Log Set Heat resistant material (minimum requirements) with Figure 6 - 10” or Less wooden mantel or other combustible projection: Minimum Mantel Clearance with No Hood To install the heater with a wooden mantel, shelf or other combustible projection above, first measure the heat resis- 28”...

  • Page 9: Floor Clearance

    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.

  • Page 10: Fireplace Preparation

    FIREPLACE PREPARATION NBST27 Unvented Gas Log Set Before installing in a solid fuel burning fireplace, The chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. This appliance is for installation only in a solid fuel burning fireplace (masonry fireplace or manufactured fireplace) with a working flue and constructed of noncombustible material.
  • Page 11 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.

  • Page 12: Gas Line Connection

    GAS LINE CONNECTION NBST27 Unvented Gas Log Set 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).

  • Page 13: Electrical Wiring (Millivolt)

    ELECTRICAL WIRING - MILLIVOLT NBST27 Unvented Gas Log Set Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. The Millivolt valve is a self-powered combination gas con- trol THAT DOES NOT REQUIRE 110VAC TO OPERATE.

  • Page 14: Remote Receiver

    ELECTRICAL WIRING - MILLIVOLT NBST27 Unvented Gas Log Set CONNECT REMOTE RECEIVER A. Complete Millivolt System Check (“A” Reading - Thermostat contacts CLOSED - Control 1. Set remote receiver. Refer to instructions included in knob “ON” - Main burner should turn ON) the receiver kit.

  • Page 15: Log Placement

    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 add additional logs or embellishments such as pine cones, vermiculite or rock wool to the heater.

  • Page 16: Log Placement

    LOG PLACEMENT NBST27 Unvented Gas Log Set Log 1 LOG PLACEMENT Figure 18 - Begin on Side A, valve on left as Place Log #1 you face the fireplace. 1. Place log #1 on burner by aligning two (2) holes on bot-...
  • Page 17 LOG PLACEMENT NBST27 Unvented Gas Log Set Log #5 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.
  • Page 18 LOG PLACEMENT NBST27 Unvented Gas Log Set 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 protrusion on middle of log #1.

  • Page 19: Flame Appearance

    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.

  • Page 20: Operating Instructions

    OPERATING INSTRUCTIONS NBST27 Unvented Gas Log Set OPERATING INSTRUCTIONS Avoid any drafts that alter burner flame patterns. Do not allow fans to blow directly into the fireplace. Do not place a blower inside the burn area of the firebox. Ceiling fans may create drafts that alter flame patterns.

  • Page 21: Millivolt Control Lighting Instructions

    OPERATING INSTRUCTIONS NBST27 Unvented Gas Log Set 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 22.

  • Page 22: Match Lighting Instructions

    OPERATING INSTRUCTIONS and MAINTENANCE NBST27 Unvented Gas Log Set MATCH LIGHTING INSTRUCTIONS 1. Remove any items necessary for easy access to the pilot (for example: logs, screens, etc.). 2. Follow appropriate lighting instructions found previously. Instead of pushing and releasing the piezo button, light a match and hold the flame to the end of the pilot and ignite the pilot.

  • Page 23: Troubleshooting

    TROUBLESHOOTING NBST27 Unvented Gas Log Set NOTE: All troubleshooting items are listed in order of Turn off heater and allow to cool before operation. cleaning. Disconnect electrical power before cleaning or servicing. Problem Possible Cause Solution When ignitor button is 1.
  • Page 24 TROUBLESHOOTING NBST27 Unvented Gas Log Set Problem Possible Cause Solution ODS/pilot lights, but flame 1. Press in control knob fully. 1. Control knob not fully pressed in. goes out when control 2. After ODS/pilot lights, keep control 2. Control knob not pressed in long knob is released.

  • Page 25: Replacement Parts

    REPLACEMENT PARTS NBST27 Unvented Gas Log Set Ref. Description Qty. NBST27NV NBST27PV Complete Log Set 81D3051 81D3051 Log #1 81D3034 81D3034 Log #2 81D3035 81D3035 Log #3 81D3036 81D3036 Log #4 81D3037 81D3037 Log #5 81D3038 81D3038 Log #6 81D3039...

  • Page 26: Accessories

    ACCESSORIES NBST27 Unvented Gas Log Set Description Part Number Flex Connector Flexcon 30 Wall Switch and Wire MVWS Wall Thermostat Kit On/Off Remote RCB, RCMT, TLM, WMTD Thermostat Remote RCST, RCT, TLT, WWTD Remote Receiver Cover Ember RRCE Remote Receiver Cover Metal...

  • Page 27: Requirements In Massachusetts

    NBST27 Unvented Gas Log Set Massachusetts Residents Only — Please read and follow these special requirements 2. Approved Carbon Monoxide Detectors. Each carbon NOTE REGARDING VENTED PRODUCTS monoxide detector as required in accordance with the above This product must be installed by a licensed plumber or gas fitter provisions shall comply with NFPA 720 and be ANSI/UL 2034 when installed within the Commonwealth of Massachusetts.

  • Page 28: Warranty

    Vermont Castings Group in the appliance are found to be defective in materials or workmanship, 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.

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