Heatilator CNXT70PLUS User manual

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 1
Owner’s Manual
Installation and Operation
Models:
CNXT70PLUS
Fresh Air Fireplace
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.
In the Commonwealth of Massachusetts:
• installation must be performed by a licensed plumber or gas fitter.
• a CO detector shall be installed in the room where the appliance is
installed.
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
Refractory must be ordered separately.

2 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
Congratulations on selecting a Heatilator Home Products gas
appliance—an elegant and clean alternative to wood burning
appliances. The Heatilator Home Products 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 Home Products gas appliance will
give you years of durable use and trouble-free enjoyment.
Welcome to the Heatilator Home Products family of appliance
products!
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 #
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:

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 3
Table of Contents
1 Listing and Code Approvals 4
A. Appliance Certification. . . . . . . . . . . . . . . . . . . . . . . . . 4
B. BTU Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
C. 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. Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
D. Mantel Projections. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Termination Locations 9
A. Vent Termination Minimum Clearances . . . . . . . . . . . . 9
5 Vent Information and Diagrams 9
6 Appliance Preparation 10
A. Securing and Leveling the Appliance . . . . . . . . . . . . 10
7 Gas Information 11
A. Fuel Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
C. Gas Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . 12
8 Electrical Information 13
A. Recommendation for Wire. . . . . . . . . . . . . . . . . . . . . 13
B. Connecting to the Appliance . . . . . . . . . . . . . . . . . . . 13
C. System Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
D. Wall Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
E. Optional Accessories Requirements . . . . . . . . . . . . . 17
F. Junction Box Installation . . . . . . . . . . . . . . . . . . . . . . 18
9 Finishing 19
A. Mantel Projections. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
B. Facing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Appliance Setup 20
A. Install the Refractory . . . . . . . . . . . . . . . . . . . . . . . . . 20
B. Log Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
C. Place the Silica Rock (Techno Sil). . . . . . . . . . . . . . . 20
D. Place the Lava Rock . . . . . . . . . . . . . . . . . . . . . . . . . 20
11 Operating Instructions 21
A. Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 21
B. Lighting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . 23
C. After the Appliance is Lit . . . . . . . . . . . . . . . . . . . . . . 24
12 Troubleshooting 25
13 Maintaining and Servicing the Appliance 26
A. Annual Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 26
B. Cleaning the Burner and Control Compartment . . . . 26
C. HRV200PLUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
D. Ember Bed Bulb Replacement . . . . . . . . . . . . . . . . . 26
E. Log Removal/Replacement . . . . . . . . . . . . . . . . . . . . 26
14 Reference Materials 27
A. Appliance Dimension Diagram . . . . . . . . . . . . . . . . . 27
B. Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
C. Optional Components . . . . . . . . . . . . . . . . . . . . . . . . 33
D. Limited Lifetime Warranty . . . . . . . . . . . . . . . . . . . . . 35
E. Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Note: An arrow () found in the text signifies change in content.

4 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
1 Listing and Code Approvals
A. Appliance Certification
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: CNXT70PLUS
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Vented Gas Appliance
STANDARD: ANSI Z21.50-2000 • ANSI Z21.47-1998 •
CSA 2.22-2000 • CGA 2.3-M98
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. BTU Specifications
C. High Altitude Installations
The CNXT70PLUS is power vented. High altitude gas appli-
ance considerations are no longer of concern, as long as the
gas appliance is properly installed with the HRV200PLUS
properly balanced (refer to HRV200PLUS manual).
Note: This appliance CANNOT be installed at an elevation
above 6,200 ft (1,890 meters)
This is a power-vented gas appliance. Do not burn
wood or materials other than as listed on the rating
plate in this fresh air fireplace.
WARNING
Model
Max Input
BTUH
Min Input
BTUH Orifice Size
CNXT70PLUS-LP Front 43,500 33,000 .039 in./.99 mm
Back .066 in./1.68 mm
CNXT70PLUS-NG Front 47,000 34,000 .059 in./1.49 mm
Back .117 in/2.97 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.
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Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 5
A. Design and Installation Considerations
Heatilator Home Products vented gas appliances are de-
signed to operate with all exhaust gases expelled to the out-
side of the building.
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 Getting Started
Sharp Edges
• Wear protective gloves and safety
glasses during installation.
CAUTION

6 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
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 14.
Figure 3.1 Appliance Locations
3 Framing and Clearances
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)
42 in.
(1067 mm)
42 in.
(1067 mm)
42 in.
(1067 mm)
23-1/2 in.
(597 mm)
50-5/8 in.
(1286 mm)
50-5/8 in.
(1286 mm)
1/2 in. (13 mm)
min.
appliance
to combustibles
Alcove
Installation
23-1/2 in.
(597 mm)
48 in.
(1219 mm max.)
43 in.
(1092 mm)
Drywall
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Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 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, in reagions where cold air infiltration
may be an issure, 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 tem-
perature caulk or stuffed with unfaced insulation. If the appli-
ance is being installed on a cement slab, a layer of plywood
may 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

8 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
C. Clearances
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 3.4 Clearances to Mantel Legs or Wall Projections (Accept-
able on both sides of opening)
0 in.
1/2 in.
(13 mm)
32-7/8 in.
(835 mm)
0 in.
to floor
0 in. to combustibles
in front of the FAF
23-1/2 in.
(597 mm)
38-3/4 in.
(984 mm)
42 in.
(1067 mm)
Figure 3.2 Clearances to Combustibles
Measured from top of fireplace opening (in inches)
3
4
5
6
7
8
9
10
11
12
10-3/4
13-3/4
13-3/4
13-3/4
16-3/4
16-3/4
16-3/4
19-3/4
19-3/4
19-3/4
32-7/8 in. minimum
to ceiling
Figure 3.3 Clearances to Mantels or Other Combustibles Above
Appliance
D. Mantel Projections
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Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 9
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.
4 Termination Locations
Note: Refer to the HRV200PLUS installation manual for
additional installation and venting instructions.
5 Vent Information and Diagrams
Note: Refer to the HRV200PLUS installation manual for
additional installation and venting instructions.
Fire Risk
Fumes Risk
This unit MUST be vented with the
HRV200PLUS.
• Do not connect to a chimney flue.
The CNXT70PLUS will not vent
correctly unless it is connected to the
HRV200PLUS.
WARNING

10 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
6 Appliance Preparation
Do NOT notch into the framing around the appliance
spacers.
CAUTION
Figure 6.1 Proper Positioning, Leveling and Securing of an
Appliance
A. Securing and Leveling the Appliance
Fire Risk
• ALWAYS maintain specified clearances
around the appliance.
• Do NOT notch into the framing around
the appliance spacers.
WARNING
Failure to keep insulation or other materials
away from vent pipe may cause fire.
The diagram shows how to properly position, level, and se-
cure the appliance. Nailing tabs are provided to secure the
appliance to the framing members.
• Place the appliance into position.
• Level the appliance from side to side and front to back.
• Shim the appliance as necessary. It is acceptable to use
wood shims.
• Bend out nailing tabs on each side.
• Keep nailing tabs flush with the framing.
• Secure the appliance to the framing by using nails or
screws through the nailing tabs.

Fire Risk!
• Prevent contact with sagging, loose
insulation.
• Do NOT install against combustible
materials such as exposed insulation,
plastic and insulation backer.
WARNING
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Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 11
A. Fuel Conversion
Before making gas connections ensure appliance being in-
stalled is compatible with the available gas type.
Any natural or propane gas conversions necessary to meet
the appliance and locality needs must be made by a quali-
fied technician using Hearth & Home Technologies specified
and approved parts.
B. Gas Pressure
Proper input pressures are required for optimum appliance
performance. Gas line sizing requirements need to be made
following NFPA51.
C. Gas Connection
Refer to Reference Section 14 for location of gas line access
in appliance.
• Ensure that gas line does not come in contact with outer
wrap of appliance. Follow local codes.
• Incoming gas line should be piped into the valve
compartment and connected to the 1/2 in. connection on
the manual shutoff valve.
Note: Have the gas supply line installed in accordance
with local building codes, if any. If not, follow ANSI
223.1. Installation should be done by a qualified installer
approved and/or licensed as required by the locality. (In
the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fitter.)
Note: A listed (and Commonwealth of Massachusetts
approved) 1/2 in. (13 mm) T-handle manual shut-off valve
and flexible gas connector are connected to the 1/2 in.
(13 mm) control valve inlet.
• If substituting for these components, please consult local
codes for compliance.
Pressure requirements for appliance are shown in table be-
low. Minimum pressures must be met when other household
gas appliances are operating.
Pressure Natural Gas Propane
Minimum Inlet Pressure 5.0 in. w.c. 11.0 in. w.c.
Maximum Inlet Pressure 7.0 in. w.c. 14.0 in. w.c.
Manifold Pressure 3.5 in. w.c. 10.0 in. w.c.
WARNING
Gas Leak Risk
• Support control when attaching pipe to
prevent bending gas line.
7 Gas Information
Fire Risk
Explosion Risk
High pressure will damage valve.
• Disconnect gas supply piping BEFORE
pressure testing gas line at test pressures
above 1/2 psig.
• Close the manual shutoff valve BEFORE
pressure testing gas line at test pressures
equal to or less than 1/2 psig.
WARNING
Note: Gas line may be run from the left side of appliance
using the knockout provided. Hole in outer shell NOT to
exceed 2-1/2 in. and should never penetrate the firebox.
Fire Risk
Explosion Risk
Verify inlet pressures.
• High pressure may cause overfire
condition.
• Low pressure may cause explosion.
• Verify minimum pressures when other
household gas appliances are operating.
Install regulator upstream of valve if line
pressure is greater than 1/2 psig.
WARNING
Note: The gap between supply piping and gas access hole
may be caulked with high temperature caulk or stuffed
with non-combustible, unfaced insulation to prevent cold
air infiltration.
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12 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
• A small amount of air will be in the gas supply lines. When
first lighting appliance it will take a short time for air to
purge from lines. When purging is complete the appliance
will light and operate normally.
WARNING
Fire Risk
Explosion Risk
• Gas build-up during line purge may
ignite.
• Purge should be performed by qualified
technician.
• Ensure adequate ventilation.
• Ensure there are no ignition sources such
as sparks or open flames.
WARNING
Fire Risk
Do NOT change the valve settings.
• This valve has been preset at the
factory.
• Changing valve settings may result in fire
hazard or bodily injury.
WARNING
CHECK FOR GAS LEAKS
Fire Risk
Explosion Risk
Asphyxiation Risk
• Check all fittings and connections.
• Do not use open flame.
• After the gas line installation is complete,
all connections must be tightened and
checked for leaks with a commercially
available, non-corrosive leak check
solution. Be sure to rinse off all leak check
solution following testing.
Fittings and connections may have loosened
during shipping and handling.
D. High Altitude Installations
The CNXT70PLUS is power vented. High altitude gas appli-
ance considerations are no longer of concern, as long as the
gas appliance is properly installed with the HRV200PLUS
properly balanced (refer to HRV200PLUS manual).

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 13
A. Recommendation for Wire
• Requires 110 VAC to be wired to the junction box for proper
operation of the appliance.
Battery polarity must be correct or module damage will
occur.
CAUTION
Shock Risk
Explosion Risk
Do NOT wire 110V to valve.
Do NOT wire 110V to wall switch
• Incorrect wiring will damage millivolt
values.
• Incorrect wiring will override IPI safety
lockout and may cause explosion.
WARNING
8 Electrical Information
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
CAUTION Shock Risk
• Replace damaged wire with type 105° C
rated wire.
• Wire must have high temperature
insulation.
CAUTION
B. Connecting to the Appliance
• Low voltage and 110 VAC voltage cannot be shared within
the same wall box.

14 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
C. System Wiring
Note: The CNXT70PLUS must be electrically wired and grounded in accordance with local codes or, in the
absence of local codes, with National Electric Code ANSI/NFPA 70-latest edition or the Canadian Electric
Code, CSA C22.1.
Figure 8.1 Intermittent Pilot Ignition Wiring Diagram
CNXT70PLUS Requirements
• This gas appliance requires a 110VAC supply to the gas appliance junction box for operation. A wiring diagram is shown
in Figure 8.1.
• The CNXT70PLUS is equipped with an intermittent pilot control valve which operates on a 3 volt system. See ignition
wiring diagram, Figure 8.1.
• The CNXT70PLUS is supplied with a 3 volt AC transformer, which requires the installation of the supplied junction box.
It is highly recommended that the junction box be installed at this time to avoid future reconstruction.
Note: Wire terminal latch can become
damaged if excessive force is used
when releasing wire. Please use caution
in pressing retainer.

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 15
HRV200PLUS Control Wiring
The CNXT70PLUS is designed to operate as a system
with the HRV200PLUS. Six low-voltage wires are required
to electrically connect the two appliances. Common 24
gauge solid conductor thermostat wire, or equivalent may
be used.
EMBER LIGHTS
OFF/ON HI/EMBER
FIRE
T14 T13 T12 T11 T10 T9
P1
REM
REM
LOW
P2
LO
HI
12V
C1
C2
COM
R1
K3
K2
K1
T8 T7
T6 T5
T4 T3
T2 T1
T16 T15
IPI
SOLENOID
PRESS. SW
R1
LED1
LINE NEU
EMBER
Not Used
Install Jumper
between R2 & 12V.
Figure 8.2 CNXT70PLUS & HRV200PLUS Boards Wired Together
The connections are illustrated in Figure 8.2. A short
jumper wire is required to be field installed between R2
and 12V on the HRV200PLUS control board.

16 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
Figure 8.3 Appliance Circuit Board Wiring

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 17
D. Wall Switch
This appliance comes with a triple-gang wall switch which controls the following functions:
• Flame - On/Off
Turns the appliance burner operation on and off. This switch may be overridden by the use of a wall switch, remote control
or hearth thermostat connected to the REM terminals.
• Electric Embers - On/Off
Turns electric ember lights on and off. Electric ember lights are optional only when the appliance burners are not in use.
Electric ember lights are always on during flame operation.
• Hi Fire/Low Fire
Turns gas valve solenoid off for 100% rate operation and on for 70% rate operation.
Note: When wired as shown the appliance will operate when any of the following actions occur:
1. The wall switch is placed in the “ON” position, or
2. The remote control is placed in the “ON” mode, or
3. The hearth room thermostat is placed in the “ON” position.
Note: Accessory circulating fans CANNOT be used with the CNXT70PLUS.
EMBER LIGHTS
OFF/ON HI/EMBER
FIRE
T14 T13 T12 T11 T10 T9
P1
REM
REM
LOW
P2
LO
HI
12V
C1
C2
COM
R1
K3
K2
K1
T8 T7
T6 T5
T4 T3
T2 T1
T16 T15
IPI
SOLENOID
PRESS. SW
R1
LED1
LINE NEU
EMBER
HEARTH ROOM
THERMOSTAT
REMOTE RECEIVER
VALVE
Figure 8.4 Circuit Board to Switches
E. Optional Accessories Requirements
Wiring for optional accessories should be done now to avoid reconstruction. These controls must be connected to the ap-
pliance using the REM terminals on the control board. A wiring diagram is shown in Figure 8.4.

18 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
Figure 8.6 Junction Box
F. Junction Box Installation
If the box is being wired from the OUTSIDE of the appliance:
• Remove the cover plate located on the outer shell - right side (see Figure 8.5).
• Install the supplied Romex™ connector in the cover plate.
• Feed the necessary length of wire through the connector.
• Make all necessary wire connections and reattach the cover plate to the outer shell.
If the box is being wired from the INSIDE of the appliance:
• Remove the screw attaching the junction box/receptacle to the outer shell, rotate the junction box inward to disengage
it from the outer shell (see Figure 8.5).
• Pull the electrical wires from outside the appliance through this opening into the valve compartment.
• Feed the necessary length of wire through the connector.
• Make all necessary wire connections to the box/receptacle and reassemble the box/receptacle to the outer shell.
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WHT
WHT
BLK
BLK
GRN wire
inside box
Copper
ground attached
to GRN screw with
GRN wire
14/2WG
Cover Plate
outside firebox
Romex
Connector
Figure 8.5 Junction Box Detail

Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05 19
A. Mantel Projections
Figure 9.1 shows the minimum vertical and corresponding
maximum horizontal dimensions of appliance mantels or
other combustible projections above the top front edge of
the appliance.
B. Facing Material
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 9.2 Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
High
Temperature
Sealant
Thesesurfaces
may be covered with
noncombustible material.
Thesesurfaces
may be covered with
noncombustible
material.
Figure 9.3 Noncombustible Facing Diagram
9 Finishing
Fire Risk
Finish all edges and fronts to clearances and
specifications listed in manual.
WARNING
• Metal appliance front may be covered with non-
combustible material only.
• Do NOT overlap combustible materials onto appliance
front.
• Install combustible materials only up to specified
clearances on top, front and sides.
• Seal joints between the finished wall and appliance
top and sides using only a 300° F minimum sealant.
Fire Risk
Explosion Risk
• Facing and/or finishing materials must never
overhang into the glass opening.
• Overhanging materials may ignite.
• May interfere with proper operation of glass
assembly.
WARNING
Measured from top of fireplace opening (in inches)
3
4
5
6
7
8
9
10
11
12
10-3/4
13-3/4
13-3/4
13-3/4
16-3/4
16-3/4
16-3/4
19-3/4
19-3/4
19-3/4
32-7/8 in. minimum
to ceiling
Figure 9.1 Clearances to Mantels or Other Combustibles Above
Appliance
Fire Risk
Do NOT obstruct air inlets.
Finishing materials must not interfere with:
• Air flow through inlets.
• Access for service.
WARNING
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20 Hearth & Home Technologies • CNXT70PLUS • 4034-105 Rev C • 09/05
10 Appliance Setup
B. Log Assembly
(See Service Parts, Complete Log Set for log numbers)
• Place left front Log (#9) on the far left grate bar so the
notch on the log sets on the horizontal portion of the grate
bar and the body of the log is on the grate burner. See
Figure 10.1.
Figure 10.1 Place Left Front Log
Figure 10.2 Placing Left Top Log
Figure 10.3 Place Right Center Log
Figure 10.4 Silica Rocks
Figure 10.5 Painting the Rocks
• Place left top log (#5) on the white notches of left center
log and back log. Set log so the “Y” is pointed down. See
Figure 10.2
• Place right center log (#4) on the white notches in left
center log and back log. Log should set on log tab welded
to back of far right grate bar. Long leg of “Y” in log should
point towards front center of log set. See Figure 10.3.
A. Install the Refractory
Follow the installation instructions supplied with the refrac-
tory kit.
C. Place the Silica Rock (Techno Sil)
• Paint the silica rocks with spray paint (supplied). See
Figures 10.4 and 10.5.
• Place the silica rock so it completely covers the ember
bed. See Figure 10.6.
Figure 10.6 Placing the Silica Rock
D. Place the Lava Rock
• Place the lava rock around the ember bed and up to front
lip of hearth pan. See Figure 10.7.
Figure 10.7 Placing the Lava Rock