Heatilator CNXT70IT User manual

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 1
Owner’s Manual
Installation and Operation
Models:
CNXT70IT CNXT70IH
CNXT70ILT CNXT70ILH
CNXT90IT CNXT90IH
CNXT90ILT CNXT90ILH
Direct Vent Gas Appliance
DO NOT DISCARD THIS MANUAL
CAUTION
• Important operating
and maintenance
instructions included.
• Leave this manual with
party responsible for
use and operation.
• Read, understand
and follow these
instructions for safe
installation and
operation.
DO NOT
DISCARD
Installation and service of this appliance should
be performed by qualified personnel. Hearth &
Home Technologies suggests NFI certified or
factory-trained professionals, or
technicians supervised by an NFI
certified professional.
If the information in these instruc-
tions is not followed exactly, a
fire may result causing property
damage, personal injury, or death.
• Do not store or use gasoline or other flam-
mable 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.
WARNING
HOT! DO NOT TOUCH.
SEVERE BURNS MAY RESULT.
CLOTHING IGNITION MAY RESULT.
WARNING
• Keep children away.
• CAREFULLY SUPERVISE children in same room as
appliance.
• Alert children and adults to hazards of high
temperatures.
• Do NOT operate with protective barriers removed or
door open.
• Keep clothing, furniture, draperies and other
combustibles away.
Glass and other surfaces are hot during
operation and cool down.
This appliance has been supplied with an integral barrier to
prevent direct contact with the fixed glass panel. Do NOT
operate the appliance with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the bar-
rier is not present or help is needed to properly install one.
This appliance may be installed as an OEM installation
in manufactured home (USA only) or mobile home and
must be installed in accordance with the manufacturer’s
instructions and the manufactured home construction and
safety standard, Title 24 CFR, Part 3280 or Standard for
Manufactured Home Installations, ANSI A225.1.
This appliance is only for use with the type(s) of gas indicated
on the rating plate.

2 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
Congratulations on selecting a Heatilator gas appliance—an
elegant and clean alternative to wood burning appliances.
The Heatilator gas appliance you have selected is designed
to provide the utmost in safety, reliability, and efficiency.
As the owner of a new appliance, you’ll want to read and
carefully follow all of the instructions contained in this owner’s
manual. Pay special attention to all cautions and warnings.
This owner’s manual should be retained for future reference.
We suggest you keep it with your other important documents
and product manuals.
The information contained in this owner’s manual, unless
noted otherwise, applies to all models and gas control
systems.
Your new Heatilator gas appliance will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heatilator family of appliance products!
Homeowner Reference Information
Model Name: Date purchased/installed:
Serial Number: Location on appliance:
Dealership purchased from: Dealer phone:
Notes:
We recommend that you record the following pertinent
information about your appliance:
Listing Label Information/Location
The model information regarding your specific appliance can be found on the rating plate located in the control area of the
appliance.
Congratulations
XXXX
CERTIFIED
FOR CANADA
CERTIFIÉ POUR LE
CANADA
Hearth & Home Technologies Inc
1915 W. Saunders Street
Mt. Pleasant, IA 52641
SERIAL
NO. DE SÉRIE
ANSI Standard
MODEL MFG. DATE
MODÈLE DATE DE FAB.
GAS TYPE/TYPE DE GAZ NATURAL/NATUREL PROPANE
ALTITUDE 0-2000 2000-4000 FT/PI 0-2000 2000-4000 FT/PI
MAX INPUT/DÉBIT XX,XXX XX,XXX BTUH XX,XXX XX,XXX BTUH
MIN INPUT/DÉBIT XX,XXX XX,XXX BTUH XX,XXX XX,XXX BTUH
MANIFOLD PRESSURE/PRESSION TUBULAIRE
MAX. XX IN. W.C./C. D'EAU XX IN. W.C./C. D'EAU
MIN. XX IN. W.C./C. D'EAU XX IN. W.C./C. D'EAU
MIN. INLET PRESS. XX IN. W.C./C. D'EAU 1XX IN. W.C./C. D'EAU
FOR THE PURPOSE OF INPUT ADJUSTMENT
PRESS. MIN. D'ALIMENTATION
ORIFICE SIZE
DIAM. DE L'INJECTEUR XX/XX DIA. in./mm XX/XX DIA. in./mm
LESS THAN/MOINS DE 3 AMPÈRES., 115V., 60 Hz
DO NOT REMOVE OR COVER THIS LABEL.
VENTED GAS FIREPLACE - NOT FOR USE WITH SOLID FUEL.
FOYER À GAZ À ÉVACUATION - NE DOIT PAS ÊTRE UTILISÉ
AVEC UN COMBUSTIBLE SOLIDE.
XXXXXXXXX
XXXXXX
Serial #
Gas Type
Orifice
Size
Model #

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 3
Table of Contents
1 Listing and Code Approvals 4
A. Appliance Certification. . . . . . . . . . . . . . . . . . . . . . . . . 4
B. Glass Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 4
C. BTU Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . . 4
E. Non-Combustible Materials . . . . . . . . . . . . . . . . . . . . . 4
F. Combustible Materials. . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Getting Started 5
A. Design and Installation Considerations . . . . . . . . . . . . 5
B. Tools and Supplies Needed. . . . . . . . . . . . . . . . . . . . . 5
C. Inspect the Appliance and Components . . . . . . . . . . . 5
3 Framing and Clearances 6
A. Select Appliance Location . . . . . . . . . . . . . . . . . . . . . . 6
B. Construct the Appliance Chase. . . . . . . . . . . . . . . . . . 7
C. Mantel Projections. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
D. Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4 Termination Locations 9
A. Vent Termination Minimum Clearances. . . . . . . . . . . . 9
5 Vent Information and Diagrams 11
A. Vent Table Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
B. Use of Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
C. Measuring Standards . . . . . . . . . . . . . . . . . . . . . . . . 11
D. Vent Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Vent Clearances and Framing 21
A. Pipe Clearances to Combustibles . . . . . . . . . . . . . . . 21
B. Wall Penetration Framing . . . . . . . . . . . . . . . . . . . . . 21
C. Vertical Penetration Framing . . . . . . . . . . . . . . . . . . . 22
7 Appliance Preparation 23
A. Conversion from Top Vent to Rear Vent . . . . . . . . . . 23
B. Securing and Leveling the Appliance . . . . . . . . . . . . 26
8 Installing Vent Pipe 27
A. Assemble Vent Sections . . . . . . . . . . . . . . . . . . . . . . 27
B. Disassemble Vent Sections. . . . . . . . . . . . . . . . . . . . 29
C. Install the Heat Shield and Horizontal Termination Cap
30
D. Install Roof Flashing and Vertical Termination Cap . . 31
E. Assemble and Install Storm Collar . . . . . . . . . . . . . . 31
9 Gas Information 32
A. Fuel Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
C. Gas Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . .33
10 Electrical Information 34
A. Recommendation for Wire. . . . . . . . . . . . . . . . . . . . . 34
B. Connecting to the Appliance . . . . . . . . . . . . . . . . . . . 34
C. Intellifire Ignition System Wiring . . . . . . . . . . . . . . . .34
D. Wall Switch and Dashboard Wiring . . . . . . . . . . . . . . 35
E. Junction Box Installation . . . . . . . . . . . . . . . . . . . . . . 36
F. Wall Switch Installation for Fan (Optional). . . . . . . . . 36
11 Finishing 37
A. Mantel Projections. . . . . . . . . . . . . . . . . . . . . . . . . . . 37
B. Facing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
12 Appliance Setup 38
A. Remove Glass Assembly . . . . . . . . . . . . . . . . . . . . . 38
B. Remove the Shipping Materials . . . . . . . . . . . . . . . . 38
C. Install the Dashboard . . . . . . . . . . . . . . . . . . . . . . . . 38
D. Clean the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . 38
E. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
F. Rockwool, Lava Rock, Vermiculite Placement . . . . . 38
G. Log Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
H. Glass Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
I. Grilles and Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
J. Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
K. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
13 Operating Instructions 42
A. Before Operating this Appliance . . . . . . . . . . . . . . . . 42
B. Lighting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . 43
C. After the Appliance is Lit . . . . . . . . . . . . . . . . . . . . . . 44
D. Frequently Asked Questions . . . . . . . . . . . . . . . . . . . 44
14 Troubleshooting 45
A. Intellifire Ignition System . . . . . . . . . . . . . . . . . . . . . . 45
15 Maintaining and Servicing the Appliance 47
A. Maintenance and Service . . . . . . . . . . . . . . . . . . . . . 47
B. Maintenance and Service Tasks:. . . . . . . . . . . . . . . . 48
16 Reference Materials 49
A. Appliance Dimension Diagram . . . . . . . . . . . . . . . . . 49
B. Vent Components Diagrams . . . . . . . . . . . . . . . . . . . 50
C. Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
D. Optional Components . . . . . . . . . . . . . . . . . . . . . . . . 58
E. Limited Lifetime Warranty . . . . . . . . . . . . . . . . . . . . . 59
F. Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Note: An arrow () found in the text signifies change in
content.

4 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
1
1
Listing and Code Approvals
A. Appliance Certification
This product is listed to ANSI standards for “Vented Gas
Fireplaces” and applicable sections of “Gas Burning Heating
Appliances for Manufactured Homes and Recreational
Vehicles”, and “Gas Fired Appliances for Use at High
Altitudes”.
Do NOT use this appliance if any part 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 which has been
under water.
WARNING
MODELS: CNTX70IT/ILT/IH/ILH
CNXT90IT/ILT/IH/ILH
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Gas Appliance
STANDARD: ANSI Z21.88-2000•CSA2.33-2000•IR41, P4
and IR56
NOT INTENDED FOR USE AS A PRIMARY HEAT
SOURCE. This appliance is tested and approved as either
supplemental room heat or as a decorative appliance. It
should not be factored as primary heat in residential heating
calculations.
Note: This installation must conform with local codes. In the
absence of local codes you must comply with the National
Fuel Gas Code, ANSI Z223.1-latest edition in the U.S.A.
and the CAN/CGA B149 Installation Codes in Canada.
B. Glass Specifications
Hearth & Home Technologies appliances manufactured with
tempered glass may be installed in hazardous locations such
as bathtub enclosures as defined by the Consumer Product
Safety Commission (CPSC). The tempered glass has been
tested and certified to the requirements of ANSI Z97.1 and
CPSC 16 CFR 1202 (Safety Glazing Certification Council
SGCC# 1595 and 1597. Architectural Testing, Inc. Reports
02-31919.01 and 02-31917.01).
This statement is in compliance with CPSC 16 CFR Section
1201.5 “Certification and labeling requirements” which refers
to 15 U.S. Code (USC) 2063 stating “…Such certificate shall
accompany the product or shall otherwise be furnished to
any distributor or retailer to whom the product is delivered.”
Some local building codes require the use of tempered glass
with permanent marking in such locations. Glass meeting
this requirement is available from the factory. Please contact
your dealer or distributor to order.
C. BTU Specifications
D. High Altitude Installations
U.L. Listed gas appliances are tested and approved without
requiring changes for elevations from 0 to 2000 feet in the
U.S.A. and Canada.
When installing this appliance at an elevation above 2000 ft,
it may be necessary to decrease the input rating by chang-
ing the existing burner orifice to a smaller size. Input rate
should be reduced by 4% for each 1000 ft above a 2000 ft
elevation in the U.S.A., or 10% for elevations between 2000
and 4500 ft in Canada. If the heating value of the gas has
been reduced, these rules do not apply. To identify the prop-
er orifice size, check with the local gas utility.
If installing this appliance at an elevation above 4500 ft (in
Canada), check with local authorities.
Caliber NXT 70 90
Input Rate (NG) 40,000 BTU/hr. 45,000 BTU/hr.
Input Rate (LP) 37,500 BTU/hr. 40,000 BTU/hr.
Orifice Size (NG) Front .059 in./1.49 mm .067 in./1.70 mm
Orifice Size (NG) Back .110 in./2.79 mm .110 in./2.79 mm
Orifice Size (LP) Front .035 in./.89 mm .035 in./.89 mm
Orifice Size (LP) Back .063 in./1.60 mm .067 in./1.70 mm
E. Non-Combustible Materials
Materials that are reported as passing ASTM E 136, Stan-
dard Test Method for Behavior of Materials in a Vertical
Tube Furnace at 750° C, shall be considered non-combus-
tible materials.
F. Combustible Materials
Materials made of or surfaced with wood, compressed pa-
per, plant fibers, plastics, or other material that can ignite and
burn, whether flame proofed or not, or whether plastered or
unplastered shall be considered combustible materials.

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 5
A. Design and Installation Considerations
Heatilator direct vent gas appliances are designed to op-
erate with all combustion air siphoned from outside of the
building and all exhaust gases expelled to the outside. No
additional outside air source is required.
Check building codes prior to installation.
• Installation MUST comply with local, regional,
state and national codes and regulations.
• Consult insurance carrier, local building, fire
officials or authorities having jurisdiction about
restrictions, installation inspection, and permits.
CAUTION
When planning an appliance installation, it’s necessary to
determine the following information before installing:
• Where the appliance is to be installed.
• The vent system configuration to be used.
• Gas supply piping.
• Electrical wiring.
• 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.
Reciprocating saw Framing material
Pliers Hi temp caulking material
Hammer Gloves
Phillips screwdriver Framing square
Flat blade screwdriver Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Manometer
Voltmeter Tape measure
Non-corrosive leak check solution
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
One 1/4 in. female connection (for optional fan).
Keep appliance dry.
• Mold or rust may cause
odors.
• Water may damage controls.
WARNING
C. Inspect the Appliance and Components
• Carefully remove the appliance and components from the
packaging.
• The vent system components and trim doors are shipped
in separate packages.
• The gas logs may be packaged separately and must be
field 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.
Inspect appliance and components for
damage. Damaged parts may impair safe
operation.
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components.
Report damaged parts to dealer.
WARNING
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
2
2 Getting Started

6 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
In addition to these framing dimensions, also reference the
following sections:
• Clearances and Mantel Projections (Sections 3.C. and 3.D.)
• Vent Clearances and Framing (Section 6)
Rear vent
One 45° elbow
Horiz Term
Rear Vent
Two 90° elbows
Horiz Term
Rear Vent
One 90° elbow
Vert Term
Top Vent
One 90° elbow
Horiz Term
No elbows
Horiz Term
A
A
A
G
A
A
C
D
B
B
F
1 in. (25 mm) min.
pipe to combustibles I
E
1/2 in. (13 mm) min.
appliance to
combustibles
E
I
1 in. (25 mm) min.
pipe to
combustibles
F
1/2 in. (13 mm) min.
appliance to
combustibles
Alcove
Installation
C
H
Drywall A
Note:
• Illustrations reflect typical installations and are FOR
DESIGN PURPOSES ONLY.
• Illustrations/diagrams are not drawn to scale.
• Actual installation may vary due to individual design
preference.
Fire Risk
Provide adequate clearance:
• Around air openings.
• For service access.
Locate appliance away from traffic areas.
WARNING
A. Select Appliance Location
When selecting a location for your appliance it is important to
consider the required clearances to walls (See Figure 3.1).
Note: For actual appliance dimensions refer to
Section 16.
Figure 3.1 Appliance Locations
3
3 Framing and Clearances
Model # A B C D E F G H I
CNXT70I Series in. 42 50-5/8 23-1/2 71-5/8 50-5/8 52-5/8 43 48 59-3/4
mm 1067 1286 597 1819 1286 1337 1092 1220 1518
CNXT90I Series in. 48 55-1/4 23-1/2 78-1/4 55-1/4 55-1/4 49 48 59-3/4
mm 1219 1403 597 1988 1403 1403 1245 1220 1518


Heatilator • CNXT Series • 4000-011 Rev N • 11/05 7
B. Construct the Appliance Chase
A chase is a vertical boxlike structure built to enclose the gas
appliance and/or its vent system. Vertical vents that run on
the outside of a building may be, but are not required to be,
installed inside a chase.
Construction of the chase may vary with the type of build-
ing. These instructions are not substitutes for the require-
ments of local building codes. Local building codes MUST
be checked.
Chases should be constructed in the manner of all outside
walls of the home to prevent cold air drafting problems. The
chase should not break the outside building envelope in any
manner.
Walls, ceiling, base plate and cantilever floor of the chase
should be insulated. Vapor and air infiltration barriers should
be installed in the chase as per regional codes for the rest of
the home. Additionally, Hearth & Home Technologies recom-
mends that the inside surfaces be sheetrocked and taped for
maximum air tightness.
To further prevent drafts, the ceiling firestops should be
caulked with high temperature caulk to seal gaps. Gas line
holes and other openings should be caulked with high temp
caulk or stuffed with unfaced insulation. If the appliance is
being installed on a cement slab, we recommend that a layer
of plywood be placed underneath to prevent conducting cold
up into the room.
Fire Risk
Odor Risk
• Install appliance on hard metal or wood
surfaces extending full width and depth
of appliance.
• Do NOT install appliance directly on
carpeting, vinyl, tile or any combustible
material other than wood.
WARNING
Fire Risk
• Construct chase to all clearance
specifications in manual.
• Locate and install appliance to all
clearance specifications in manual.
WARNING
Measured from top of
fireplace opening (in inches)
1 - 3
4 - 6
7 - 9
10- 12
9-1/2
12-1/2
15-1/2
18-1/2
34-1/2 in.
minimum
to ceiling
12 in. is the maximum
mantel projection allowed.
Figure 3.2 Clearances to Mantels or Other Combustibles Above
Appliance
1 in. (25 mm) min.
to perpendicular wall
A
3-1/2 in. (89 mm) min.
from fireplace opening
to perpendicular wall
B
48 in.
(1219 mm)
max.
Mantel Leg or
Perpendicular Wall
Top of
Appliance
Drywall
A
B
Figure 3.3 Clearances to Mantel Legs or Wall Projections (Accept-
able on both sides of opening)
C. Mantel Projections
12 in. (305 mm) is the maximum
mantel projection allowed.

8 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
C
B
A
Combustible flooring may be installed
next to the front of the appliance.
34-1/2 in.
(876 mm)
to ceiling
0 in.
Drywall
0 in.
36 in.
(914 mm)
Combustible Object
1/2 in.
(13 mm)
1/2 in.
(13 mm)
D
0 in.to level
of standoffs
Figure 3.4 Clearances to Combustibles
Model
A
Rough
Opening
(Width)
B
Rough
Opening
(Height)
C
Rough
Opening
(Depth)
D
Rough
Opening
(DVP Pipe)
CNXT70I
Seroes
in. 42 38-3/4 23-1/2 10
mm 1067 984 597 254
CNXT90I
Series
in. 48 38-3/4 23-1/2 10
mm 1219 984 597 254
D. Clearances


Heatilator • CNXT Series • 4000-011 Rev N • 11/05 9
Horizontal
overhang
12
X
20 in.
(508 mm)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertical
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
24 in. min.
(610 mm)
Roof Pitch H (Min.) Ft. Roof Pitch H (Min.) Ft.
Flat to 6/12 1.0* Over 11/12 to 12/12 4.0
Over 6/12 to 7/12 1.25* Over 12/12 to 14/12 5.0
Over 7/12 to 8/12 1.5* Over 14/12 to 16/12 6.0
Over 8/12 to 9/12 2.0* Over 16/12 to 18/12 7.0
Over 9/12 to 10/12 2.5 Over 18/12 to 20/12 7.5
Over 10/12 to 11/12 3.25 Over 20/12 to 21/12 8.0
* 3 ft. minimum in snow regions
Storm Collar
Roof
Flashing
A. Vent Termination Minimum Clearances
Fire Risk
Explosion Risk
• Do not pack air space with insulation or
other materials.
Maintain vent clearance to combustibles as
specified.
WARNING
Failure to keep insulation or other materials
away from vent pipe may cause fire.
Measure horizontal clearances from this surface.
Measure vertical clearances from this surface
Figure 4.1 Clearances from Cap Surfaces
Figure 4.2
Minimum Height from Roof to Lowest Discharge Opening
(see Figure 4.4 for specific clearances)
Gas Termination Wood & Fuel Oil Termination
A 6 in. (152 mm) 20 in. (508 mm)
Gas, Wood or Fuel
Oil Termination
20 in.
(508 mm)
(minimum) to
Perpendicular
Wall
(gas only)
18 in.
(457 mm)
A
Gas
Termination
Figure 4.3 Multiple Vertical Termination
Figure 4.2 specifies minimum vent heights for various
pitched roofs.
4
4 Termination Locations

10 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS SUGGESTED THAT A VINYL PROTECTOR KIT BE INSTALLED.
Figure 4.4 Minimum Clearances for Terminations
Dimension Descriptions
A Clearance above the ground, a veranda, porch, deck or balcony - 12
in. (30 cm) minimum. *
B Clearance to window or door that may be opened – 10,000 BTUs
or less, 6 in. (15 cm) minimum; 10,000-50,000 BTUs, 9 in. (23 cm)
minimum; over 50,000 BTUs, 12 in. (30 cm) minimum. *
C Clearance to permanently closed window – 12 in. (30 cm) minimum
- recommended to prevent condensation on window.
D Vertical clearance to ventilated soffit located above the termination
within a horizontal distance of 2 ft (60 cm) from the centerline of the
termination – 18 in. (46 cm) minimum. **
E Vertical clearance to unventilated soffit - 12 in. (30 cm) minimum. **
F Clearance to outside corner - 6 in. (15 cm) minimum.
G Clearance to inside corner - 6 in. (15 cm) minimum.
H Not to be installed above a meter/regulator assembly within 3 ft (90
cm) horizontally* from the center line of the regulator (Canada only)
I Clearance to service regulator vent outlet – 3 ft (.91 m) U.S. minimum
and 6 ft (1.8 m) Canada minimum. *
J Clearance to non-mechanical air supply inlet into building or the
combustion air inlet to any other appliance – 9” (23 cm) U.S. minimum
and 12 in. (30 cm) Canada minimum. *
K Clearance to mechanical air supply inlet - 3 ft (.91 m) U.S. minimum
and 6 ft (1.8 m) Canada minimum. *
L Clearance above a paved sidewalk or paved driveway located on public
property - 7 ft (2.1 m) minimum.
A vent may not terminate directly above a sidewalk or paved driveway
which is located between two single family dwellings and serves both
dwellings.
M Clearance under veranda, porch, deck or balcony - 12 in. (30 cm)
minimum. * Recommended 30 in. (76 cm) for vinyl or plastic.
Only permitted if veranda, porch, deck or balcony is fully open on a
minimum of 2 sides beneath the floor. *
N Vertical clearance between two horizontal termination caps – 12 in. (30
cm) minimum.
O Horizontal clearance between two horizontal termination caps – 12 in.
(30 cm) minimum.
P 6” - Non-vinyl sidewalls
12” – Vinyl sidewalls
Q 18” – Non-vinyl soffit and overhang
42” – Vinyl soffit and overhang
R 8 ft.
D
E
B
LC
V
V
B
F
V
BV
V
B
X
A
J
Fixed
Fixed
Closed
Closed
M
VK X
RESTRICTION ZONE
RESTRICTION ZONE
(TERMINATION NOT
(TERMINATION NOT
ALLOWED)
ALLOWED)
AIR SUPPLY INLET
AIR SUPPLY INLET
X
GAS METER
GAS METER
V
TERMINATION CAP
TERMINATION CAP
H
B
Openable
Openable
Fixed
Fixed
Closed
Closed
V
I
V
O
N
QP
R
T
S
E
lectrical
Service
V
U
VU
V
W
D*
V
V
Alcove Clearances Clearances to Electrical Service
A
V
V
G
Measure horizontal clearances
from this surface.
Measure vertical clearances
from this surface
Smin Tmax
1 cap 3 ft 2 x S actual
2 caps 6 ft 1 x S actual
3 caps 9 ft 2/3 x S actual
4 caps 12 ft 1/2 x S actual
Smin = # term caps x 3 T max = (2/# term caps) x S (actual)
U 6” min. – Clearance from sides of electrical service.
W 12” min. – Clearance above electrical service.
* As specified in CGA B149 Installation Codes
Note: Local codes or regulations may require different clearances.
** Clearance required to vinyl soffit material – 30 in. (76 cm) minimum.
Note: Location of the vent termination must not interfere with access
to the electrical service.
WARNING!
In the U.S.: Vent system termination is NOT permitted in screened
porches. You must follow side wall, overhang and ground clearances
as stated in the instructions.
In Canada: Vent system termination is NOT permitted in screened
porches. Vent system termination is permitted in porch areas with two
or more sides open. You must follow all side wall, overhang and ground
clearances as stated in the instructions.
Hearth & Home Technologies assumes no responsibility for the improper
performance of the appliance when the venting system does not meet
these requirements.

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 11
A. Vent Table Key
The abbreviations listed in this vent table key are used in the
vent diagrams.
Symbol Description
V1First section (closest to appliance) of vertical length
V2Second section of vertical length
H1First section (closest to appliance) of horizontal length
H2Second section of horizontal length
Fire Risk
Explosion Risk
Asphyxiation Risk
Do NOT connect this gas appliance to a
chimney flue serving a separate solid-fuel
or gas burning appliance.
• Vent this appliance directly outside.
• Use separate vent system for this
appliance.
May impair safe operation of this appliance or
other appliances connected to the flue.
WARNING
B. Use of Elbows
Diagonal runs have both vertical and horizontal vent aspects
when calculating the effects. Use the rise for the vertical as-
pect and the run for the horizontal aspect (see Figure 5.1).
Two 45° elbows may be used in place of one 90° elbow. On
45° runs, 1 ft of diagonal is equal to 8-1/2 in. horizontal run
and 8-1/2 in. vertical run. A length of straight pipe is allowed
between two 45° elbows (see Figure 5.1).
ALL vent configuration specifications MUST be
followed.
• This product is tested and listed to these
specifications.
• Appliance performance will suffer if specifications
are not followed.
CAUTION
C. Measuring Standards
Vertical and horizontal measurements listed in the vent dia-
grams were made using the following standards.
• Pipe measurements are shown using the effective length
of pipe (see Figure 5.2).
• Measurements are made from the appliance outer wrap,
not from the standoffs.
• Horizontal terminations are measured to the outside
mounting surface (flange of termination cap) (see
Figure 4.1).
• Vertical terminations are measured to top of last pipe
before termination cap.
• Horizontal pipe installed level with no rise.
Horizontal
Vertical
8-1/2 in.
8-1/2 in.
12 in.
Figure 5.1 Using Two 45° Elbows
Effective
Length
DVP Pipe
(see chart)
Effective
Pipe Length in inches
DVP4 4
DVP6 6
DVP12 12
DVP24 24
DVP36 36
DVP48 48
DVP6A 3 to 6
DVP12A 3 to 12
DVP12MI 3 to 12
DVP24MI 3 to 24
Figure 5.2 DVP Pipe Effective Length
5
5 Vent Information and Diagrams

12 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Fire Risk
Explosion Risk
Do NOT pack insulation or other combustibles between firestops.
• ALWAYS maintain specified clearances around venting and firestop systems.
• Install firestops as specified.
Failure to keep insulation or other material away from vent pipe may cause fire.
WARNING
The first 90° elbow MUST be a starter elbow.
To replace the first starter elbow with two 45° elbows, refer to Figure 5.4. All other 90° elbows can be replaced with two 45°
elbows.
General Rules:
•SUBTRACT 3 ft (914 mm) from the total H measurement for each 90° elbow installed horizontally.
SUBTRACT 1-1/2 ft (457 mm) from the total H measurement for each 45° elbow installed horizontally.
•A maximum of three 90° elbows (or six 45° elbows) may be used in any vent configuration. Some elbows may be installed
horizontally. See Figure 5.6.
•Elbows may be placed back to back anywhere in the system as long as the first 90° elbow is a starter elbow except as
shown in Figure 5.4.
• When penetrating a combustible wall, a wall shield firestop must be installed.
• When penetrating a combustible ceiling, a ceiling firestop must be installed.
H1
V1
Figure 5.3 Top Vent-Horiztonal Termination-One Elbow
Table 5.1
V1min. V1max. H1 max.
0* - 24 in./610mm
6 in./152 mm - 6 ft/1.83 m
12 in./305 mm - 11 ft/3.35 m
18 in./457 mm - 18 ft/5.49 m
24 in./610 mm - 25 ft/7.62 m
- 25 ft/7.62 m 25 ft/7.62 m
* You may install the elbow directly on top of the
appliance
D. Vent Diagrams
Top Vent—Horizontal Termination—One Elbow

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 13
Top Vent—Horizontal Termination—Two 45° Elbows
Installation requirements to replace the first 90° elbow with two 45° elbows:
4 ft min.
(1.22 m)
25 ft max.
(7.62 m)
Figure 5.4 Minimum Installation Requirements for
Two 45° Elbows-Top Vent-Horizontal Termination
Top Vent—Horizontal Termination—Three Vertical Elbows
See Figure 5.6 for information about installing elbows horizontally.
H1
V1
V2
H2
Installed
Vertically
Figure 5.5 Three Vertically Installed 90° Elbows
Table 5.2
V1min. V1+V2max. H1+H2 max.
12 in./305 mm 24 ft/7.32 m 19 ft/5.79 m

14 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Top Vent—Horizontal Termination—Two or Three Elbows
You may use a maximum of three 90° elbows (or six 45° elbows) in any vent configuration, Some may be installed hori-
zontally.
H1V1
H2
H3
Installed
Horizontally
Installed
Vertically
H2
Figure 5.6 Two or Three Elbows, some Horizontal
Note: Subtract 3 ft (914 mm) from the total horizontal
measurement for each 90° elbow installed horizontally.
Subtract 1-1/2 ft (457 mm) from the total horizontal
measurement for each 45° elbow installed horizontally.
Table 5.3
V1min. V1max. H1+H2max. H1+H2+H3max.
6 in./152 mm x 6 ft/1.83 m x
12 in./305 mm x 11 ft/3.35 m 11 ft/3.35 m
18 in./457 mm x 18 ft/5.49 m 18 ft/5.49 m
24 in./610 mm x 25 ft/7.62 m 25 ft/7.62 m
x 25 ft/7.62 m 25 ft/7.62 m 25 ft/7.62 m

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 15
12 ft (3.66 m) min.
60 ft (18.29 m) max.
Top Vent—Vertical Termination—No Elbows
Top Vent—Vertical Termination—Two Elbows
Figure 5.7 Vertical Termination - No Elbows
12 ft (3.66 m) min.
60 ft (18.29 m) max.
Maximum horizontal
run is 100% of
vertical, but cannot
exceed 26 ft (7.92 m)
Figure 5.8 Vertical Termination - Two Elbows

16 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Top Vent—Vertical Termination—Three Elbows
Figure 5.10 Vertical Termination - No Elbows
Rear Vent—Horizontal Termination—No Elbows
12 ft (3.66 m) min.
60 ft (18.29 m) max.
Maximum horizontal run is
100% of vertical, but cannot
exceed 26 ft (7.92 m)
Figure 5.9 Vertical Termination - Three Elbows (some horizontal)
Note: Subtract 3 ft (914 mm) from the total horizontal
measurement for each 90° elbow installed horizontally.
Subtract 1-1/2 ft (457 mm) from the total horizontal
measurement for each 45° elbow installed horizontally.
18 in. (457 mm) max.

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 17
Rear Vent—Horizontal Termination—One 45° Elbow
18 in. (457 mm) max.
Figure 5.11 Horizontal Termination - One 45° Elbow
Rear Vent—Horizontal Termination—Two Elbows
H2
V1
H1
Figure 5.12 Horizontal Termination - Two Elbows
Table 5.4
H1Max
Total Vert
V Min.
Total Horiz
H1+ H2
0-1ft/0-.31 m 1 ft/.31 m 4 ft/1.22 m
2 ft/.61 m 1 ft/.31 m 4 ft/1.22 m
3 ft/.91 m 1 ft/.31 m 6 ft/1.83 m
0-1ft/0-.31 m 2 ft/.61 m 6 ft/1.83 m
2 ft/.61 m 2 ft/.61 m 6 ft/1.83 m
3 ft/.91 m 2 ft/.61 m 8 ft/2.44 m
0-1ft/0-.31 m 3 ft/.91 m 8 ft/2.44 m
2 ft/.61 m 3 ft/.91 m 8 ft/2.44 m
3 ft/.91 m 3 ft/.91 m 9 ft/2.74 m
0-1ft/0-.31 m 4 ft/1.22 m 10 ft/3.05 m
2 ft/.61 m 4 ft/1.22 m 10 ft/3.05 m
3 ft/.91 m 4 ft/1.22 m 10 ft/3.05 m

18 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Rear Vent—Horizontal Termination—Three Elbows
H2
V1
H3
H1
Installed
Horizontally
Figure 5.13 Vertical Termination - Three Elbows
Note: Subtract 3 ft (914 mm) from the total horizontal
measurement for each 90° elbow installed horizontally.
Subtract 1-1/2 ft (457 mm) from the total horizontal
measurement for each 45° elbow installed horizontally.
Table 5.5
H1Max
Total Vert
V Min.
Total Horiz
H1+ H2 + H3
0 1 ft/.31 m 4 ft/1.22 m
1ft/.31 m 1 ft/.31 m 4 ft/1.22 m
2 ft/.61 m 1 ft/.31 m 4 ft/1.22 m
0 2 ft/.61 m 5 ft/1.52 m
1ft/.31 m 2 ft/.61 m 5 ft/1.52 m
2 ft/.61 m 2 ft/.61 m 5 ft/1.52 m
0 3 ft/.91 m 5 ft/1.52 m
1ft/.31 m 3 ft/.91 m 5 ft/1.52 m
2 ft/.61 m 3 ft/.91 m 5 ft/1.52 m
0 4 ft/1.22 m 6 ft/1.83 m
1ft/.31 m 4 ft/1.22 m 6 ft/1.83 m
2 ft/.61 m 4 ft/1.22 m 6 ft/1.83 m

Heatilator • CNXT Series • 4000-011 Rev N • 11/05 19
12 ft (3.66 m) min.
60 ft (18.29 m) max.
0 min.
6 ft (1.83 m) max.
Maximum horizontal
run is 100% of
vertical, but cannot
exceed 26 ft (7.92 m)
Rear Vent—Vertical Termination—Two Elbows
Figure 5.15 Vertical Termination - Two Elbows
Rear Vent—Vertical Termination—One Elbow
12 ft (3.66 m) min.
60 ft (18.29 m) max.
0 min.
6 ft (1.83 m) max.
Figure 5.14 Vertical Termination - One Elbow
Note: Subtract 3 ft (914 mm) from the total horizontal
measurement for each 90° elbow installed horizontally.
Subtract 1-1/2 ft (457 mm) from the total horizontal
measurement for each 45° elbow installed horizontally.

20 Heatilator • CNXT Series • 4000-011 Rev N • 11/05
12 ft (3.66 m) min.
60 ft (18.29 m) max.
0 min.
6 ft (1.83 m) max.
Maximum horizontal run is
100% of vertical, but can-
not exceed 26 ft (7.92 m).
Figure 5.16 Vertical Termination - Three Vertical Elbows
Rear Vent—Vertical Termination—Three Vertical Elbows