
Heatilator • NBV3630I-B, NBV3933I-B, NBV4236I-B, NBV4842I-B Installation Manual • 2376-980 Rev. F • 7/16
6
2 Getting Started
A. Design and Installation Considerations
Heatilator B-type vent gas appliances are designed to
operate with all exhaust gases expelled to the outside of
the building, and combustion air pulled from the room.
Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, fire officials or authorities having
jurisdiction over restrictions, installation inspection and
permits.
Before installing, determine the following:
• Where the appliance is to be installed.
• The vent system configuration to be used.
• Gas supply piping requirements.
• Electrical wiring requirements.
• Framing and finishing details.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
B. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Tape measure Framing material
Pliers Hammer
Phillips screwdriver Manometer
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Flat blade screwdriver
Non-corrosive leak check solution
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
Caulking material (300ºF minimum continuous exposure
rating)
One 1/4 in. female connection (for optional fan).
Hearth & Home Technologies disclaims any responsibility for,
and the warranty will be voided by, the following actions:
• Installation and use of any damaged appliance or vent
system component.
• Modification of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the gas logs or the glass door.
• Installation and/or use of any component part not approved
by Hearth & Home Technologies.
Any such action may cause a fire hazard.
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under
water. Call a qualified service technician to inspect the
appliance and to replace any part of the control system
and/or gas control which has been under water.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualified
service technician, service agency or your dealer.
C. Inspect Appliance and Components
The following B-vent components are needed for instal-
lation.
• Fireplace Box
• Pipe Components
• Firestops
• Attic Insulation Shield
• Elbows
• Strapping
• Roof Flashing or Chase Top
• Termination Cap
• Storm Collar
• Carefully remove the appliance and components from
the packaging.
• The vent system components and decorative doors
and fronts may be shipped in separate packages.
• If packaged separately, the log set and appliance grate
must be installed.
• Report to your dealer any parts damaged in shipment,
particularly the condition of the glass.
• Read all of the instructions before starting the
installation. Follow these instructions carefully during
the installation to ensure maximum safety and benefit.
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in-
complete or substitute components. Keep appliance dry.
Installation and service of this
appliance should be performed by
qualified personnel. Hearth & Home
Technologies recommends HHT
Factory Trained or NFI certified
professionals.