Heatiator NNXT3933IL, NNXT4236I, NNXT4236IL, NNXT3933I User Manual

Model(s):
NNXT4236I, NNXT4236IL
NNXT3933I, NNXT3933IL

Owner’s Manual

Installation and Operation

CAUTION

DO NOT DISCARD THIS MANUAL

•

• Important operating and
maintenance instructions
included.

Read, understand and follow
these instructions for safe
installation and operation.

WARNING

If the information in these instruc­tions is not followed exactly, a
fi re may result causing property
damage, personal injury, or death.

• Do not store or use gasoline or other fl am-
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 fi re department.

• Installation and service must be performed
by a qualifi ed installer, service agency, or

the gas supplier.

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

Installation in Mobile Homes, CAN/CSA Z240MH.

This appliance is only for use with the type(s) of gas
indicated on the rating plate.

DO NOT

DISCARD

•

Leave this manual with
party responsible for
use and operation.

WARNING

HOT SURFACES!

Glass and other surfaces are hot during
operation and cool down.

Hot glass will cause burns.

• Do not touch glass until it is cooled

• NEVER allow children to touch glass

• Keep children away

• CAREFULLY SUPERVISE children in same room as
appliance.

• Alert children and adults to hazards of high
temperatures.

High temperatures may ignite clothing or other
fl ammable materials.

• Keep clothing, furniture, draperies and other combustibles
away.

This appliance has been supplied with an integral
barrier to p revent direct contact with the fi xed glass
panel. Do NOT operate t he appliance with the bar rier
removed.

Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.

In the Commonwealth of Massachusetts installation must
be performed by a licensed plumber or gas fi tter;

See Table of Contents for location of additional
Commonwealth of Massachusetts requirements.

Installation and service of this appliance should be performed
by qualified personnel. Hearth & Home Technologies
suggests NFI certifi ed or factory-trained professionals, or
technicians supervised by an NFI certifi ed professional.

1Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

Read this manual before installing or operating this appliance.

Please retain this owner’s manual for future reference.

A. Congratulations

Congratulations on selecting a Heatilator gas fi replace, an
elegant and clean alternative to wood burning fi replaces.
The Heatilator gas fi replace you have selected is designed
to provide the utmost in safety, reliability, and effi ciency.

As the owner of a new fi replace, 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.

Homeowner Reference Information

This owner’s manual should be retained for future reference.
We suggest that 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 fi replace will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heatilator family of fi replace products!

We recommend that you record the following pertinent
information about your fi replace.

Model Name: ___________________________________________ Date purchased/installed: __________________
Serial Number: __________________________________________ Location on fi replace: _____________________
Dealership purchased from: _______________________________ Dealer Phone: __________________________
Notes: _______________________________________________________________________________________
_____________________________________________________________________________________________

Listing Label Information/Location

Type of Gas

Gas and Electric
Information

Not Not for for use use with with solid solid fuel.fuel.
((Ne Ne doit doit pas pas entre entre utilise utilise avec avec un un combustible combustible solide).solide).

Type Type o f of Gas Gas (Sorte (Sorte De De Gaz)Gaz)::

NNAATURALTURAL GASGAS

Minimum Minimum Permissible Permissible Gas Gas Supply Supply for for Purposes Purpose s of of Input Input Adjustment.Adjustment.
Approved Approved Minimum Minimum (De (De Gaz) Gaz) AcceptableAcceptable 0.00.0 in in w.c.w.c. (Po. (Po. Col. Col. d’eau)d’eau)
Maximum Maximum Pressure Pressure (Pression)(Pression) 0.00.0 in in w.c.w.c. (Po. (Po. Col. Col. d’eau)d’eau)
Maximum Maximum Manifold Manifold Pressure Pressure (Pression)(Pression) 0.00.0 in in w.c.w.c. (Po. (Po. Col. Col. d’eau)d’eau)
Minimum Minimum Manifold Manifold Pressure Pressure (Pression)(Pression) 0.00.0 in in w.c.w.c. (Po. (Po. Col. Col. d’eau)d’eau)
Total Total Electrical Electrical Requirements: Requirements: 000Vac, 000Vac, 00Hz., 00Hz., less less than than 00 00 AmperesAmperes

ALTITUDE:ALTITUDE: 0-0000 0-0000 FT.FT. 0000-0000FT.0000-0000FT.
MAX. MAX. INPUT INPUT BTUH:BTUH: 00,00000,000 00,00000,000
MIN. MIN. INPUT INPUT BTUH:BTUH: 00,00000,000 00,00000,000
ORIFICE ORIFICE SIZE:SIZE: #XXXXX#XXXXX #XXXXX#XXXXX

The model information regarding your specifi c fi replace can be found on
the rating plate usually located in the control area of the fi replace.

Heatilator, a brand of Hearth & Home Technologies, Inc.
7571 215th Street West, Lakeville, MN 55044

This This appliance appliance must must be be installed installed in in accordance accordance with with local local codes, codes, if if any; any; if if not, not, follow follow ANSI ANSI Z223.1Z223.1
in in the the USA USA or or CAN/CGA CAN/CGA B149 B149 installation installation codes. codes. (Installer (Installer l’appareil l’appareil selon selon les les codes codes ou ou reglementsreglements

locaux locaux ou, ou, en en l’absence l’absence de de tels tels reglements, reglements, selon selon les les codes codes d’installation d’installation CAN/CGA-B149.)CAN/CGA-B149.)

ANSI ANSI Z21XX-XXXX Z21XX-XXXX · · CSA CSA 2.XX-MXX 2.XX-MXX · · UL307B

UL307B

IN IN CANADACANADA

Model:Model:

(Modele):(Modele):

SerialSerial

(Serie):(Serie):

MADE MADE IN IN USAUSA

XXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXX

Model Number

Serial Number

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/122

Safety Alert Key:

• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.

• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.

• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE: Used to address practices not related to personal injury.

Table of Contents

A. Congratulations 2
B. Limited Lifetime Warranty 5

1 Listing and Code Approvals

A. Appliance Certifi cation 7
B. Glass Specifi cations 7
C. BTU Specifi cations 7
D. High Altitude Installations 7
E. Non-Combustible Materials Specifi cation 7
F. Combustible Materials Specifi cation 7
G. Electrical Codes 7
H. Requirements for the Commonwealth
of Massachusetts 8

User Guide

2 Operating Instructions

A. Gas Fireplace Safety 9
B. Your Fireplace 9
C. Fan Kit (optional) 10
D. Clear Space 10
E. Decorative Doors and Fronts 10
F. Fixed Glass Assembly 10



G. Remote Controls, Wall Controls and Wall
Switches 10
H. IPI Battery Tray/Battery Installation 11
I. Control Module Operation 11
J. Before Lighting Fireplace 11
K. Lighting Instructions (IPI) 12
L. After Fireplace is Lit 13
M. Frequently Asked Questions 13

3 Maintenance and Service

A. Maintenance Tasks-Homeowner 14
B. Maintenance Tasks-Qualifi ed Service Technician 15

Installer Guide

4 Getting Started

A. Typical Appliance System 16
B. Design and Installation Considerations 17
C. Tools and Supplies Needed 17
D. Inspect Appliance and Components 17

5 Framing and Clearances

A. Select Appliance Location 18
B. Construct the Appliance Chase 19
C. Clearances 20
D. Mantel and Wall Projections 21

6 Termination Locations

A. Vent Termination Minimum Clearances 22

7 Vent Information and Diagrams

A. Approved Pipe 24
B. Vent Table Key 24
C. Use of Elbows 24
D. Measuring Standards 24
E. Vent Diagrams 25

8 Vent Clearances and Framing

A. Pipe Clearances to Combustibles 35
B. Wall Penetration Framing 35
C. Install the Ceiling Firestop 36
D. Install Attic Insulation Shield 37

9 Appliance Preparation

A. Top Vent 38
B. Rear Vent 39
C. Secure and Level the Appliance 40

10 Install Vent Pipe

A. Assemble Vent Sections (DVP Only) 41
B. Assemble Vent Sections (SLP Only) 42
C. Assemble Slip Sections 42
D. Secure the Vent Sections 43
E. Disassemble Vent Sections 43
F. Install Decorative Ceiling Components
(SLP only) 44
G. Install Metal Roof Flashing 45
H. Assemble and Install Storm Collar 45
I. Install Vertical Termination Cap 46
J. Install Decorative Wall Components (SLP only) 46
K. Heat Shield Requirements for Horizontal
Termination 46
L. Install Horizontal Termination Cap 47

11 Shrouds

A. HHT Shrouds 48
B. Field Constructed Shrouds 48

12 Gas Information

A. Fuel Conversion 50
B. Gas Pressure 50
C. Gas Connection 50
D. High Altitude Installations 50

13 Electrical Information

A. Wiring Requirements 51
B. Intellifi re Plus™ Ignition System Wiring 51
C. Optional Accessories Requirements 51
D. Electrical Service and Repair 52
E. Junction Box Installation 53
F. Wall Switch Installation for Fan (Optional) 53
G. Remote Control Installation & Operations 54

3Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

14 Finishing

A. Mantel and Wall Projections 58
B. Facing Material 59

15 Appliance Setup

A. Remove the Packaging 60
B. Remove Screen Package Assembly 60
C. Remove the Shipping Materials 60
D. Removing Fixed Glass Assembly 60
E. Remove Top Log Pack 60
F. Remove Packing Material 60
G. Clean the Appliance 61
H. Accessories 61
I. Place the Rockwool 61
J. Place the Lava Rock 61
K. Place the Vermiculite 61
L. Assemble Logs 61
M. Replacing Fixed Glass Assembly 62
N. Air Shutter Setting 62
O. Remove Screen Protector 63
P. Unpackage the Hood & Floor Cover 63
Q. Install Hood 63
R. Install Control Heat Shield 63
S. Install Floor Cover 64
T. Close the Screen Assembly 65

16 Troubleshooting

A. Intellifi re Plus™ Intermittent Ignition System 66

17 Reference Materials

A. Appliance Dimension Diagram 68




B. Vent Components Diagrams 69
C. Service Parts 77
D. Optional Components 81
E. Contact Information 82

 = Contains updated information.

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/124

B. Limited Lifetime Warranty

g

y

y p

p

y

y

y

y

Hearth & Home Technologies Inc.

LIMITED LIFETIME WARRANTY

Hearth & Home Technologies Inc., on behalf of its hearth brands (”HHT”), extends the following warranty for
HHT gas, wood, pellet, coal and electric hearth appliances that are purchased from an HHT authorized dealer.

WARRANTY COVERAGE:

HHT warrants to the original owner of the HHT appliance at the site of installation, and to any transferee taking ownership
of the appliance at the site of installation within two years following the date of original purchase, that the HHT appliance
will be free from defects in materials and workmanship at the time of manufacture. After installation, if covered compo­nents manufactured by HHT are found to be defective in materials or workmanship during the applicable warranty period,
HHT will, at its option, repair or replace the covered components. HHT, at its own discretion, may fully discharge all of its
obligations under such warranties by replacing the product itself or refunding the verified purchase price of the product
itself. The maximum amount recoverable under this warranty is limited to the purchase price of the product. This warranty
is subject to conditions, exclusions and limitations as described below.

WARRANTY PERIOD:

Warranty coverage begins on the date of original purchase. In the case of new home construction, warranty coverage
begins on the date of first occupancy of the dwelling or six months after the sale of the product by an independent,
authorized HHT dealer/ distributor, whichever occurs earlier. The warranty shall commence no later than 24 months
following the date of product shipment from HHT, regardless of the installation or occupancy date. The warranty period for
parts and labor for covered components is produced in the following table.

The term “Limited Lifetime” in the table below is defined as: 20 years from the beginning date of warranty coverage for
gas appliances, and 10 years from the beginning date of warranty coverage for wood, pellet, and coal appliances. These
time periods reflect the minimum expected useful lives of the designated components under normal operating conditions.

Warranty Period HHT Manufactured Appliances and Venting

Parts Labor Gas Wood Pellet

1 Year

2 years

3 years

ears 1 year X X Castings and baffles

5

7 years 3 years X X X

10

ears

Limited

Lifetime

1 year X Burners, logs and refractory

3 yearsXXXXX Firebox and heat exchanger

XXXXXXX

XXX

XXXXX Factor

X Molded refractor

XFire

EPA

Wood

Coal Electric Venting

Components Covered

All parts and material except as

covered by Conditions,

Exclusions, and Limitations

listed

Igniters, electronic components,

and

lass

-installed blowers

ots and burnpots

Manifold tubes,

HHT chimne

and termination

anels

90 Days

4021-645C 12-29-10 Page 1 of 2

XXXXXXX

See conditions, exclusions, and limitations on next page.

All replacement parts

ond warranty period

be

5Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

B. Limited Lifetime Warranty (continued)

WARRANTY CONDITIONS:

 7KLVZDUUDQW\RQO\FRYHUV++7DSSOLDQFHVWKDWDUHSXUFKDVHGWKURXJKDQ++7DXWKRUL]HGGHDOHURUGLVWULEXWRU$OLVWRI

++7DXWKRUL]HGGHDOHUVLVDYDLODEOHRQWKH++7EUDQGHGZHEVLWHV
 7KLVZDUUDQW\LVRQO\YDOLGZKLOHWKH++7DSSOLDQFHUHPDLQVDWWKHVLWHRIRULJLQDOLQVWDOODWLRQ
 &RQWDFW\RXULQVWDOOLQJGHDOHUIRUZDUUDQW\VHUYLFH,IWKHLQVWDOOLQJGHDOHULVXQDEOHWRSURYLGHQHFHVVDU\SDUWVFRQWDFW

WKHQHDUHVW++7DXWKRUL]HGGHDOHURUVXSSOLHU$GGLWLRQDOVHUYLFHIHHVPD\DSSO\LI\RXDUHVHHNLQJZDUUDQW\VHUYLFH

IURPDGHDOHURWKHUWKDQWKHGHDOHUIURPZKRP\RXRULJLQDOO\SXUFKDVHGWKHSURGXFW
 &KHFNZLWK\RXUGHDOHULQDGYDQFHIRUDQ\FRVWVWR\RXZKHQDUUDQJLQJDZDUUDQW\FDOO7UDYHODQGVKLSSLQJFKDUJHV

IRUSDUWVDUHQRWFRYHUHGE\WKLVZDUUDQW\

WARRANTY EXCLUSIONS:

7KLVZDUUDQW\GRHVQRWFRYHUWKHIROORZLQJ
 &KDQJHVLQVXUIDFHILQLVKHVDVDUHVXOWRIQRUPDOXVH$VDKHDWLQJDSSOLDQFHVRPHFKDQJHVLQFRORURILQWHULRUDQG

H[WHULRUVXUIDFHILQLVKHVPD\RFFXU7KLVLVQRWDIODZDQGLVQRWFRYHUHGXQGHUZDUUDQW\

 'DPDJHWRSULQWHGSODWHGRUHQDPHOHGVXUIDFHVFDXVHGE\ILQJHUSULQWVDFFLGHQWVPLVXVHVFUDWFKHVPHOWHGLWHPV

RURWKHUH[WHUQDOVRXUFHVDQGUHVLGXHVOHIWRQWKHSODWHGVXUIDFHVIURPWKHXVHRIDEUDVLYHFOHDQHUVRUSROLVKHV

 5HSDLURUUHSODFHPHQWRISDUWVWKDWDUHVXEMHFWWRQRUPDOZHDUDQGWHDUGXULQJWKHZDUUDQW\SHULRG7KHVHSDUWV

LQFOXGHSDLQWZRRGSHOOHWDQGFRDOJDVNHWVILUHEULFNVJUDWHVIODPHJXLGHVOLJKWEXOEVEDWWHULHVDQGWKHGLVFRORU-

DWLRQRIJODVV

 0LQRUH[SDQVLRQFRQWUDFWLRQRUPRYHPHQWRIFHUWDLQSDUWVFDXVLQJQRLVH7KHVHFRQGLWLRQVDUHQRUPDODQGFRP-

SODLQWVUHODWHGWRWKLVQRLVHDUHQRWFRYHUHGE\WKLVZDUUDQW\

 'DPDJHVUHVXOWLQJIURPIDLOXUHWRLQVWDOORSHUDWHRUPDLQWDLQWKHDSSOLDQFHLQDFFRUGDQFHZLWKWKHLQVWDOODWLRQ

LQVWUXFWLRQVRSHUDWLQJLQVWUXFWLRQVDQGOLVWLQJDJHQWLGHQWLILFDWLRQODEHOIXUQLVKHGZLWKWKHDSSOLDQFHIDLOXUHWR

LQVWDOOWKHDSSOLDQFHLQDFFRUGDQFHZLWKORFDOEXLOGLQJFRGHVVKLSSLQJRULPSURSHUKDQGOLQJLPSURSHURSHUD-

WLRQDEXVHPLVXVHFRQWLQXHGRSHUDWLRQZLWKGDPDJHGFRUURGHGRUIDLOHGFRPSRQHQWVDFFLGHQWRULPSURSHUO\
LQFRUUHFWO\SHUIRUPHGUHSDLUVHQYLURQPHQWDOFRQGLWLRQVLQDGHTXDWHYHQWLODWLRQQHJDWLYHSUHVVXUHRUGUDIWLQJ
FDXVHGE\WLJKWO\VHDOHGFRQVWUXFWLRQVLQVXIILFLHQWPDNHXSDLUVXSSO\RUKDQGOLQJGHYLFHVVXFKDVH[KDXVWIDQVRU
IRUFHGDLUIXUQDFHVRURWKHUVXFKFDXVHVXVHRIIXHOVRWKHUWKDQWKRVHVSHFLILHGLQWKHRSHUDWLQJLQVWUXFWLRQV
LQVWDOODWLRQRUXVHRIFRPSRQHQWVQRWVXSSOLHGZLWKWKHDSSOLDQFHRUDQ\RWKHUFRPSRQHQWVQRWH[SUHVVO\DXWKRUL]HG
DQGDSSURYHGE\++7PRGLILFDWLRQRIWKHDSSOLDQFHQRWH[SUHVVO\DXWKRUL]HGDQGDSSURYHGE\++7LQZULWLQJ

DQGRULQWHUUXSWLRQVRUIOXFWXDWLRQVRIHOHFWULFDOSRZHUVXSSO\WRWKHDSSOLDQFH
 1RQ++7YHQWLQJFRPSRQHQWVKHDUWKFRPSRQHQWVRURWKHUDFFHVVRULHVXVHGLQFRQMXQFWLRQZLWKWKHDSSOLDQFH
 $Q\SDUWRIDSUHH[LVWLQJILUHSODFHV\VWHPLQZKLFKDQLQVHUWRUDGHFRUDWLYHJDVDSSOLDQFHLVLQVWDOOHG

 ++7¶VREOLJDWLRQXQGHUWKLVZDUUDQW\GRHVQRWH[WHQGWRWKHDSSOLDQFH¶VFDSDELOLW\WRKHDWWKHGHVLUHGVSDFH,QIRUPD-

WLRQLVSURYLGHGWRDVVLVWWKHFRQVXPHUDQGWKHGHDOHULQVHOHFWLQJWKHSURSHUDSSOLDQFHIRUWKHDSSOLFDWLRQ&RQVLGHU-

DWLRQPXVWEHJLYHQWRDSSOLDQFHORFDWLRQDQGFRQILJXUDWLRQHQYLURQPHQWDOFRQGLWLRQVLQVXODWLRQDQGDLUWLJKWQHVVRI

WKHVWUXFWXUH

This warranty is void if:

 7KHDSSOLDQFHKDVEHHQRYHUILUHGRURSHUDWHGLQDWPRVSKHUHVFRQWDPLQDWHGE\FKORULQHIOXRULQHRURWKHUGDPDJLQJ

FKHPLFDOV2YHUILULQJFDQEHLGHQWLILHGE\EXWQRWOLPLWHGWRZDUSHGSODWHVRUWXEHVUXVWFRORUHGFDVWLURQEXEEOLQJ

FUDFNLQJDQGGLVFRORUDWLRQRIVWHHORUHQDPHOILQLVKHV
 7KHDSSOLDQFHLVVXEMHFWHGWRSURORQJHGSHULRGVRIGDPSQHVVRUFRQGHQVDWLRQ
 7KHUHLVDQ\GDPDJHWRWKHDSSOLDQFHRURWKHUFRPSRQHQWVGXHWRZDWHURUZHDWKHUGDPDJHZKLFKLVWKHUHVXOWRIEXW

QRWOLPLWHGWRLPSURSHUFKLPQH\RUYHQWLQJLQVWDOODWLRQ

LIMITATIONS OF LIABILITY:

 7KHRZQHU¶VH[FOXVLYHUHPHG\DQG++7¶VVROHREOLJDWLRQXQGHUWKLVZDUUDQW\XQGHUDQ\RWKHUZDUUDQW\H[SUHVVRU

LPSOLHGRULQFRQWUDFWWRUWRURWKHUZLVHVKDOOEHOLPLWHGWRUHSODFHPHQWUHSDLURUUHIXQGDVVSHFLILHGDERYH,QQR

HYHQWZLOO++7EHOLDEOHIRUDQ\LQFLGHQWDORUFRQVHTXHQWLDOGDPDJHVFDXVHGE\GHIHFWVLQWKHDSSOLDQFH6RPHVWDWHV

GRQRWDOORZH[FOXVLRQVRUOLPLWDWLRQRILQFLGHQWDORUFRQVHTXHQWLDOGDPDJHVVRWKHVHOLPLWDWLRQVPD\QRWDSSO\WR\RX

7KLVZDUUDQW\JLYHV\RXVSHFLILFULJKWV\RXPD\DOVRKDYHRWKHUULJKWVZKLFKYDU\IURPVWDWHWRVWDWH(;&(3772

7+((;7(173529,'('%</$:++70$.(612(;35(66:$55$17,(627+(57+$17+(:$55$17<

63(&,),('+(5(,17+('85$7,212)$1<,03/,(':$55$17<,6/,0,7('72'85$7,212)7+(

(;35(66(':$55$17<63(&,),('$%29(

4021-645C 12-29-10 Page 2 of 2

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/126

1

1

Listing and Code Approvals

A. Appliance Certifi cation

MODELS: NNXT4236I, NNXT4236IL, NNXT3933I,

NNXT3933IL

LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Vented Gas Fireplace Heaters
STANDARD: ANSI Z21.88-2002•CSA2.33-M2002•UL307B

This product is listed to ANSI standards for “Vented Gas
Fireplace Heaters” and applicable sections of “Gas Burn­ing Heating Appliances for Manufactured Homes and
Recreational Vehicles”, and “Gas Fired Appliances for
Use at High Altitudes”.

NOTICE: 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.

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.

B. Glass Specifi cations

This appliance is equipped with 5 mm ceramic glass. Re­place glass only with 5 mm ceramic glass. Please contact
your dealer for replacement glass.

D. High Altitude Installations

NOTICE: If the heating value of the gas has been reduced,

these rules do not apply . Check with your local gas utility or
authorities having jurisdiction.

When installing above 2000 feet elevation:

• In the USA: Reduce input rate 4% for each 1000 feet
above 2000 feet.

• In CANADA: Reduce input rate 10% for elevations
between 2000 feet and 4500 feet. Above 4500 feet,
consult local gas utility.

Check with your local gas utility to determine proper
orifi ce size.

E. Non-Combustible Materials Specifi cation

Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.

Materials that are reported as passing ASTM E 136,

Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 750 ºC and UL763 shall be

considered non-combustible materials.

F. Combustible Materials Specifi cation

Materials made of or surfaced with wood, compressed
paper, plant fi bers, plastics, or other material that can ig-
nite and burn, whether fl ame proofed or not, or plastered
or unplastered shall be considered combustible materials.

G. Electrical Codes

C. BTU Specifi cations

Novus NNXT4236 NNXT3933

Max/Min Input Rate (NG) 31,000/18,500 29,000/16,000

Orifi ce Size (NG) #37/.104/2.65 mm #39/.0995/2.53 mm

Max/Min Input Rate (LP) 30,000/17,000 27,000/15,750

Orifi ce Size (LP) #52/.0635/1.62 mm .061/155 mm

NOTICE: This appliance 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.

• A 120 V AC circuit for this product must be protected with
ground-fault circuit-interrupter protection, in compliance
with the applicable electrical codes, when it is installed
in locations such as in bathrooms or near sinks.

7Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

Note: The following requirements reference various
Massachusetts and nati onal c ode s not c ontaine d in this
document.

H. Requirements for the Commonwealth of
Massachusetts

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 fi nished grade in the area of the venting, in-
cluding but not limited to decks and porches, the following
requirements shall be satisfi ed:

Installation of Carbon Monoxide Detectors

At the time of installation of the side wall horizontal
vented gas fueled equipment, the installing plumber or
gas fi tter shall observe that a hard wired carbon mon-
oxide detector with an alarm and battery back-up is
installed on the fl oor level where the gas equipment is
to be installed. In addition, the installing plumber or gas
fi tter 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 served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property
owner to secure the services of qualifi ed licensed profes-
sionals for the installation of hard wired carbon monoxide
detectors.

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
fl oor level.

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.

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 certifi ed.

Signage

A metal or plastic identifi cation 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) in. in size,

“GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS”.

Inspection

The state 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.

Exemptions

The following equipment is exempt from 248 CMR

5.08(2)(a)1 through 4:

• 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

• 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.

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:

• Detailed instructions for the installation of the venting
system design or the venting system components;
and

• A complete parts list for the venting system design or
venting system.

Gas Equipment Venting System NOT Provided

When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does not
provide the parts for venting the fl ue gases, but identi-
fi es “special venting systems”, the following requirements
shall be satisfi ed by the manufacturer:

• The referenced “special venting system” instructions
shall be included with the appliance or equipment
installation instructions; and

• 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.

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 instructions shall
remain with the appliance or equipment at the completion
of the installation.

See Gas Connection section for additional Common­wealth of Massachusetts requirements.

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/128

2

User Guide

2

Operating Instructions

A. Gas Fireplace Safety

WARNING

HOT SURFACES!

Glass and other surfaces are hot
during operation and cool down.

Hot glass will cause burns.

• Do not touch glass until it is cooled

• NEVER allow children to touch glass

• Keep children away

• CAREFULL Y SUPERVISE children in

same room as appliance.

• Alert children and adults to hazards of high
temperatures.

High temperatures may ignite clothing or other

fl ammable materials.

• Keep clothing, furniture, draperies and other
combustibles away.

This appliance has been supplied with an integral
barrier to prevent direct contact with the fi xed glass
panel. Do NOT operate the appliance with the barrier
removed.

Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.

If you expect that small children or vulnerable adults may
come into contact with this fi replace, the following precau-
tions are recommended:

• Install a physical barrier such as:

- A decorative fi rescreen.

- Adjustable safety gate.

• Install a switch lock or a wall/remote control with child
protection lockout feature.

• Keep remote controls out of reach of children.

• Never leave children alone near a hot fi replace, whether
operating or cooling down.

• Teach children to NEVER touch the fi replace.

• Consider not using the fi replace when children will be
present.

Contact your dealer for more information, or visit: www.
hpba.org/safety-information.

To prevent unintended operation when not using your
fi replace for an extended period of time (summer months,
vacations, trips, etc):

• Remove batteries from remote controls.

• Turn off wall controls.

• Unplug 6-volt power supply and/or remove batteries.

• Turn off gas controls valve on standing pilot models.

B. Y our Fireplace

WARNING! DO NOT operate fi replace before reading and
understanding operating instructions. Failure to operate

fi replace according to operating instructions could cause
fi re or injury.

Section 2

Figure 2.1 General Operating Parts

Fan Kits

Decorative Doors

(not shown)

Section 2

Fixed Glass Assembly

Clear Space

Section 2

Section 15

Mantel

Hearth

(not required)

9Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

C. Fan Kit (optional)

If desired, a fan kit may be added. Contact your dealer to
order the correct fan kit.

D. Clear Space

WARNING! DO NOT place combustible objects in front of
the fi replace or block louvers. High temperatures may start
a fi re. See Figure 2.2.

Avoid placing candles and other heat-sensitive objects on
mantel or hearth. Heat may damage these objects.

F. Fixed Glass Assembly

See Section 15.D.

G. Remote Controls, Wall Controls and Wall
Switches

This appliance comes supplied with an RC200 hand-held
remote.

• Refer to Section 13.G. for operating instructions.

• Other controls are available. See your dealer for full
details.



3 FT. IN FRONT OF FIREPLACE

CLEAR SPACE

Figure 2.2 Clear Space

E. Decorative Doors and Fronts

WARNING! Risk of Fire! Install ONLY doors or fronts

approved by Hearth & Home Technologies. Unapproved
doors or fronts may cause fi replace to overheat.

This fi replace has been supplied with an integral barrier to
prevent direct contact with the fi xed glass panel. DO NOT
operate the fi replace with the barrier removed.

Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install
one.

For more information refer to the instructions supplied
with your decorative door or front.

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1210

H. IPI Battery Tray/Battery Installation

The IntelliFire PlusTM system has a battery backup option.
Battery longevity and performance will be affected by the
service temperatures of this appliance.

MODULE

NOTICE:

Batteries should only be used as a power source

in the event of an emergency such as an outage.

I. Control Module Operation

1. The control module has an ON/OFF/REMOTE selector
switch that must be set. See Figure 2.3.

OFF Position: Appliance will ignore all power inputs and

will not respond to any commands from a wall switch or
remote. The unit should be in the OFF position during
installation, service, battery installation, fuel conversion,
and in the event that the control goes into LOCK-OUT
mode as a result of an error code.

ON Position: Appliance will ignite and run continuously

in the HI fl ame setting, with no adjustment in fl ame
output. This mode of operation is primarily used for
initial installation or power outage operation with battery
backup.

REMOTE Position: Appliance will initiate commands

from an optional wired wall switch and/or the wireless
remote.

2. If using a wired wall switch with the module in REMOTE
mode, the fl ame output can be adjusted with the HI/LO
selector switch on the module. See Figure 2.3. Note
that the fl ame HI/LO selector switch will become inactive
once an optional remote control is programmed to the
control module. Note that the control module will always
ignite the fi replace on HI and remain so for the initial 10
seconds of operation. If the HI/LO is switched to the
LO position, the fl ame output will automatically drop to
the lowest setting after the fl ame has been established
for 10 sec. After this 10 second period, the fl ame can
be adjusted from HI to LO with the switch.

3. The control module has safety feature that automatically
shuts down the fi replace after 9 hours of continuous
operation without receiving a command from the remote.

4. If you intend to use both an optional wired wall switch
and the remote control to operate your fi replace, the wall
switch will override any commands given by the remote.

5. Module Reset

This module may lock-out under certain conditions.

When this occurs, the appliance will not ignite or respond
to commands. The module will go into lock-out mode
by emitting three audible beeps, then continuously
displaying a RED/GREEN error code at its status
indicator LED.

• Check battery tray. Remove batteries if installed.
Batteries should only be installed for use during power
outages. See Section H.

• Locate the module selector switch. (See Figure 2.3).

• Set the module selector switch to the OFF position.

NG/LP SETTING

WIRE LEAD FROM REGULATOR CONNECTS HERE

Figure 2.3 Control Module

• Wait fi ve (5) minutes to allow possible accumulated gas
to clear.

• Set the module selector switch to ON or REMOTE
position.

• Start the appliance.

WARNING! Risk of Explosion! DO NOT press the mod-

ule reset switch more than one time within a fi ve minute
time period. Gas may accumulate in fi rebox. Call a quali-
fi ed service technician.

Nine Hour Safety Shutdown Feature

This appliance has a safety feature that automatically
shuts down the fi replace after 9 hours of continuous
operation without receiving a command from the
remote.

J. Before Lighting Fireplace

Before operating this fi replace for the fi rst time, have a
qualifi ed service technician:

• Verify all shipping materials have been removed from
inside and/or underneath the fi rebox.

• Review proper placement of logs, rockwool and/or other
decorative materials.

• Check the wiring.

• Check the air shutter adjustment.

• Ensure that there are no gas leaks.

• Ensure that the glass is sealed and in the proper position
and that the integral barrier is in place.

WARNING! Risk of Fire or Asphyxiation! DO NOT oper­ate fi replace with fi xed glass assembly removed.

11Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

K. Lighting Instructions (IPI)

• For normal use, activate/deactivate your fi replace with the wall switch or remote control.

• The IPI system may be operated with four AA-cell batteries. When using batteries, unplug the power supply. T o prolong
battery life, remove them when using the power supply.

• If your fi replace must be deactivated for serviced or an extended period of time, follow the instructions below.

FOR YOUR SAFETY

READ BEFORE LIGHTING

WARNING: If you do not follow these instr uctions exactly, a fi re

or explosion may result causing propert y damage, personal injur y
or loss of life.

A. This appliance is equipped with an

intermittent pilot ignition (IPI) device
which automatically lights the burn­er. DO NOT try to light the burner by
hand.

B. BEFORE LIGHTING, smell all around

the appliance area for gas. Be sure to
smell next to the fl oor because some
gas is heavier than air and will settle
on the fl oor.

WHA T TO DO IF YOU SMELL GAS

• DO NOT try to light any appliance.

• DO NOT touch any electric switch; do
not use any phone in your building.

WARNING:

DO NOT CONNECT LINE VOLT­AGE (110/120 VAC OR 220/240
V AC) TO THE CONTROL VALVE.

Improper installation, adjustment, al­teration, service or maintenance can
cause injury or property damage. Re­fer to the owner’s information manual
provided with this appliance.

This appliance needs fresh air for
safe operation and must be installed
so there are provisions for adequate
combustion and ventilation air.

If not installed, operated, and main­tained in accordance with the manufac­turer’s instructions, this product could
expose you to substances in fuel or
fuel combustion which are known to
the State of California to cause can­cer, birth defects, or other reproductive
harm.

Keep burner and control compartment
clean. See installation and operating
instructions accompanying appliance.

For additional information on operating your

Hearth & Home Technologies fi replace, please refer to www.fi replaces.com.

• 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 fi re department.

C. DO NOT use this appliance if any

part has been under water. Imme­diately call a qualifi ed service tech-
nician to inspect the appliance and
to replace any part of the control
system and any gas control which
has been under water.

CAUTION:

Hot while in operation. DO NOT touch.
Keep children, clothing, furniture, gaso­line and other liquids having fl ammable
vapors away.

DO NOT operate the appliance with
fi xed glass assembly removed, cracked
or broken. Replacement of the fi xed
glass assembly should be done by a
licensed or qualifi ed service person.

NOT FOR USE

WITH SOLID FUEL

For use with natural gas and propane.
A conversion kit, as supplied by the
manufacturer, shall be used to convert
this appliance to the alternate fuel.

Also Certifi ed for Installation in a
Bedroom or a Bedsitting Room.

For assistance or additional informa­tion, consult a qualifi ed installer, ser-
vice agency or the gas supplier.

LIGHTING

INSTRUCTIONS (IPI)

1. This appliance is equipped with an ignition

device which automatically lights the burner.

DO NOT try to light the burner by hand.

GAS

VALVE

2. Wait fi ve (5) minutes to clear out any gas.

Then smell for gas, including near the fl oor. If
you smell gas, STOP! Follow “B” in the Safety
Information located on the left side of this la­bel. If you do not smell gas, go to next step.

3. To light the burner:
Equipped with wall switch: Turn ON/OFF switch

to ON.

Equipped with remote or wall control: Press

ON or FLAME button.

Equipped with thermostat: Set temperature to

desired setting.

4. If the appliance does not light after three tries,
call your service technician or gas supplier.

TO TURN OFF

GAS TO APPLIANCE

1. Equipped with wall switch: Turn ON/OFF switch

to OFF.

Equipped with remote or wall control: Press

OFF button.

Equipped with thermostat: Set temperature to

lowest setting.

2. Service technician should turn off electric
power to the control when performing service.

593-913G

Final inspection by

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1212

L. After Fireplace is Lit

Initial Break-in Procedure

• The fireplace should be run three to four hours
continuously on high.

• Turn the fi replace off and allow it to completely cool.

• Remove fi xed glass assembly. See Section 15.D.

• Clean fi xed glass assembly. See Section 3.

• Replace the fi xed glass assembly and run continuously
on high an additional 12 hours.

This cures the materials used to manufacture the fi re-
place.

NOTICE! Open windows for air circulation during fi replace

break-in.

• Some people may be sensitive to smoke and

odors.

• Smoke detectors may activate.

M. Frequently Asked Questions

ISSUE SOLUTIONS

Condensation on the glass This is a result of gas combustion and temperature variations. As the appliance warms, this

condensation will disappear.

Blue fl ames This is a result of normal operation and the fl ames will begin to yellow as the appliance is allowed

to burn for 20 to 40 minutes.

Odor from appliance When fi rst operated, this appliance may release an odor for the fi rst several hours. This is caused

by the curing of materials from manufacturing. Odor may also be released from fi nishing materials
and adhesives used near the appliance. These circumstances may require additional curing
related to the installation environment.

Film on the glass This is a normal result of the curing process of the paint and logs. Glass should be cleaned within

3 to 4 hours of initial burning. A non-abrasive cleaner such as gas appliance glass cleaner may be
necessary. See your dealer.

Metallic noise Noise is caused by metal expanding and contracting as it heats up and cools down, similar to the

sound produced by a furnace or heating duct. This noise does not affect the operation or longevity
of the appliance.

Is it normal to see the pilot
fl ame burn continually?

In an IntelliFire Plus™ ignition system (IPI), the pilot fl ame should turn off when appliance is
turned off. Some optional control systems available with IPI models may allow pilot fl ame to
remain lit. In a standing pilot system the pilot will always stay on.

13Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

3

3

Maintenance and Service

Any safety screen or guard removed for servicing must be
replaced prior to operating the fi replace.

When properly maintained, your fi replace will give you
many years of trouble-free service. We recommend an­nual service by a qualifi ed service technician.

A. Maintenance Tasks-Homeowner

Installation and repair should be done by a qualifi ed
service technician only. The fi replace should be inspect-
ed before use and at least annually by a professional
service person.

The following tasks may be performed annually by the
homeowner. If you are uncomfortable performing any of
the listed tasks, please call your dealer for a service ap­pointment.

More frequent cleaning may be required due to lint from
carpeting or other factors. Control compartment, burner
and circulating air passageway of the fi replace must be
kept clean.

CAUTION! Risk of Burns! The fi replace should be

turned off and cooled before servicing.

Glass Cleaning

Frequency: Seasonally
By: Homeowner

Tools Needed: Protective gloves, glass cleaner, drop

cloth and a stable work surface.

CAUTION! Handle fi xed glass assembly with care.

Glass is breakable.

Doors, Surrounds, Fronts

Frequency: Annually
By: Homeowner
Tools needed: Protective gloves, stable work surface

• Assess condition of screen and replace as necessary.

• Inspect for scratches, dents or other damage and repair
as necessary.

• Check that louvers are not blocked.

• Vacuum and dust surfaces.

Remote Control

Frequency: Seasonally
By: Homeowner
Tools needed: Replacement batteries and remote control

instructions.

• Locate remote control transmitter and receiver.

• Verify operation of remote. Refer to remote control
operation instructions for proper calibration and setup
procedure.

• Place batteries as needed in remote transmitters and
battery-powered receivers.

• Place remote control out of reach of children.

If not using your fi replace for an extended period of time
(summer months, vacations/trips, etc), to prevent unin­tended operation:

• Remove batteries from remote controls.

• Unplug 6-volt power supply on IPI models.

• Avoid striking, scratching or slamming glass

• Avoid abrasive cleaners

• DO NOT clean glass while it is hot

• Prepare a work area large enough to accommodate fi xed
glass assembly and door frame by placing a drop cloth
on a fl at, stable surface.

Note: Fixed glass assembly and gasketing may have
residue that can stain carpeting or fl oor surfaces.

• Remove door or decorative front from fi replace and set
aside on work surface.

• See Section 15.D. for instructions to remove fi xed glass
assembly.

• Clean glass with a non-abrasive commercially available
cleaner.

- Light deposits: Use a soft cloth with soap and water

- Heavy deposits: Use commercial fi replace glass cleaner
(consult with your dealer)

• Carefully set fi xed glass assembly in place on fi replace.
Hold glass in place with one hand and secure glass
latches with the other hand.

• Reinstall door or decorative front.

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1214

Venting

Frequency: Seasonally
By: Homeowner
Tools needed: Protective gloves and safety glasses.

• Inspect venting and termination cap for blockage or
obstruction such plants, bird nests, leaves, snow, debris,
etc.

• Verify termination cap clearance to subsequent
construction (building additions, decks, fences, or
sheds). See Section 6.

• Inspect for corrosion or separation.

• Verify weather stripping, sealing and fl ashing remains
intact.

• Inspect draft shield to verify it is not damaged or
missing.

B. Maintenance Tasks-Qualifi ed Service
Technician

The following tasks must be performed by a qualifi ed
service technician.

Gasket Seal and Glass Assembly Inspection

Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, drop cloth and a stable

work surface.

• Inspect gasket seal and its condition.

• Inspect fi xed glass assembly for scratches and nicks
that can lead to breakage when exposed to heat.

• Confi rm there is no damage to glass or glass frame.
Replace as necessary.

• Verify that fi xed glass assembly is properly retained and
attachment components are intact and not damaged.
Replace as necessary.

Logs

Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves.

• Inspect for damaged or missing logs. Replace as
necessary. Refer to Section 15 for log placement
instructions.

• Verify correct log placement and no fl ame impingement
causing sooting. Correct as necessary.

Firebox

Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, sandpaper, steel wool,

cloths, mineral spirits, primer and touch-up paint.

• Inspect for paint condition, warped surfaces, corrosion
or perforation. Sand and repaint as necessary.

• Replace fi replace if fi rebox has been perforated.

Burner Ignition and Operation

Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, vacuum cleaner, whisk

broom, fl ashlight, voltmeter, indexed drill bit set, and a
manometer.

• Verify burner is properly secured and aligned with pilot
or igniter.

• Clean off burner top, inspect for plugged ports, corrosion
or deterioration. Replace burner if necessary.

• Replace rockwool with new dime-size pieces. DO NOT
block ports or obstruct lighting paths. Refer to Section
15 for proper rockwool placement.

• Verify batteries have been removed from battery back­up IPI systems to prevent premature battery failure or
leaking.

• Check for smooth lighting and ignition carryover to all
ports. Verify that there is no ignition delay.

• Inspect for lifting or other fl ame problems.

• Verify air shutter setting is correct. See Section 15 for
required air shutter setting. Verify air shutter is clear of
dust and debris.

• Inspect orifi ce for soot, dirt and corrosion. Verify orifi ce
size is correct. See Service Parts List for proper orifi ce
sizing.

• Verify manifold and inlet pressures. Adjust regulator as
required.

• Inspect pilot fl ame pattern and strength. See Figure 3.1
for proper pilot fl ame pattern. Clean or replace orifi ce
spud as necessary.

• Inspect thermocouple/thermopile or IPI fl ame sensing
rod for soot, corrosion and deterioration. Polish with fi ne
steel wool or replace as required.

• Verify thermocouple/thermopile or IPI millivolt output.
Replace as necessary.

Control Compartment and Firebox Top

Frequency: Annually
By: Qualifi ed Service Technician
Tools needed: Protective gloves, vacuum cleaner, dust

cloths

• Vacuum and wipe out dust, cobwebs, debris or pet hair .
Use caution when cleaning these areas. Screw tips that
have penetrated the sheet metal are sharp and should
be avoided.

• Remove all foreign objects.

• Verify unobstructed air circulation.

Figure 3.1 IPI Pilot Flame Patterns

15Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

4

4

A. T ypical Appliance System

NOTICE: Illustrations and photos refl ect typical installations and are for design purposes only . Illustrations/diagrams are not

drawn to scale. Actual product may vary from pictures in manual

Getting Started

Note: D ual venting confi gurations
ARE NOT allowed. Appliance
MUST be vented EITHER vertically
OR horizontally.

Noncombustible Roof Flashing
maintains minimum clearance
around pipe (Section 10)

Vertical Termination Cap
(Section 10)

NOTE: An installation will have either a
vertical termination or a horizontal
termination. It will not have both (as shown).

Storm Collar
(Section 10)

Vent Pipe penetrates roof preferably
without affecting roof rafters

Installer Guide

Vent Pipe (Section 8)

Ceiling Firestop on
floor of attic (Section 8)

Horizontal Termination Cap
(Section 10)

Framing/Header
(Section 5)

Attic Insulation Shield (not shown) must be used
here to keep insulation away from vent pipe if
attic is insulated (Section 8)

Framing headed off in
ceiling joists (Section 8)

Optional Wall Switch
(Section 12)

Mantel & Mantel Leg
(Section 5 & 14)

Surround (Section 14)

Figure 4.1 Typical System

Hearth Extension
(Not required)

Gas Line
(Section 12)

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1216

B. Design and Installation Considerations

Heatilator direct vent gas appliances are designed to op­erate 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.

Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, fi re offi cials 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 confi guration to be used.

• Gas supply piping.

• Electrical wiring requirements.

• Framing and fi nishing details.

• Whether optional accessories—devices such as a fan,

wall switch, or remote control—are desired.

Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualifi ed
service technician, service agency or your dealer.

C. Tools and Supplies Needed

Before beginning the installation be sure that the following
tools and building supplies are available.

Tape measure Framing material
Pliers Non-corrosive leak check solution
Hammer Phillips screwdriver
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Manometer Flat blade screwdriver
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).

D. Inspect Appliance and Components

• 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 benefi t.

WARNING! Risk of Fire or Explosion! Damaged parts

could impair safe operation. DO NOT install damaged, in­complete or substitute components. Keep appliance dry.

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.

• Modifi cation 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 fi re hazard.

WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under wa-

ter. Call a qualifi ed service technician to inspect the appli-
ance and to replace any part of the control system and/or
gas control which has been under water.

17Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

5

5

ABCDEFG

in.

39 35-1/2 19-5/8 43-3/8 47 53-1/4 40

mm

991 902 498 1102 1194 1353 1016

in.

42 37-5/8 19-5/8 43-3/8 47 53-1/4 43

mm

1067 956 498 1102 1194 1353 1092

Model

NNXT3933

NNXT4236

Framing and Clearances

A. Select Appliance Location

When selecting a location for the appliance it is important
to consider the required clearances to walls (see Figure

5.1).

WARNING! Risk of Fire or Burns! Provide adequate

clearance around air openings and for service access. Due
to high temperatures, the appliance should be located out
of traffi c and away from furniture and draperies.

B

1/2 in. (13 mm)

min. appliance

to combustibles

Drywall

B

A

Top Vent

One 90° elbow

Horiz Term

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)

NOTICE: Illustrations refl ect typical installations and are

FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale. Actual installation may vary due to
individual design preference.

1 in. (25 mm)

min. pipe to

combustibles

D

A

G

Alcove

Installation

C

(1219 mm)

maximum

1/2 in. (13 mm) min.

48 in.

Rear vent

One 45° elbow

Horiz Term

D

appliance to

combustibles

A

E

1 in. (25 mm)

min. pipe to

combustibles

Figure 5.1 Appliance Locations

A

E

Rear Vent

One 90° elbow

Vert Term

No elbows

Horiz Term

A

Rear Vent

Two 90° elbows

Horiz Term

C

A

F

F

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1218

B. Construct the Appliance Chase

A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.

NOTICE:

fi restops and construction of the chase may vary with the
type of building. These instructions are not substitutes for the
requirements of local building codes. Therefore, you MUST
check local building codes to determine the requirements
to these steps.

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.

Treatment of ceiling fi restops and wall shield

Walls, ceiling, base plate and cantilever fl oor of the chase
should be insulated. Vapor and air infi ltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infi ltration may be an issue, the inside surfaces may
be sheetrocked and taped for maximum air tightness.

To further prevent drafts, the wall shield and ceiling
fi restops should be caulked with caulk with a minimum of
300ºF continuous exposure rating to seal gaps. Gas line
holes and other openings should be caulked with caulk
with a minimum of 300ºF continuous exposure rating or
stuffed with unfaced insulation. If the appliance is being
installed on a cement slab, a layer of plywood may be
placed underneath to prevent conducting cold up into the
room.

19Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

Model

in. mm in. mm in. mm in. mm in. mm

NNXT3933

39 991 34 7/8 886 19 5/8 498 10 254 9 229

NNXT4236

42 1067 34 7/8 886 19 5/8 498 10 254 9 229

D

Rough Opening

(SLP Pipe)

A

Rough Opening

(Width)

B

Rough Opening

(Height)

D

Rough Opening

(DVP Pipe)

C

Rough Opening

(Depth)

C. Clearances

NOTICE: Install appliance on hard metal or wood surfaces

extending full width and depth. DO NOT install directly on
carpeting, vinyl, tile or any combustible material other than
wood.

WARNING! Risk of Fire! Maintain specifi ed air space

clearances to appliance and vent pipe:

1/2 in.

(13 mm)

1/2 in.

(13 mm)

Combustible flooring may be installed next
to the front of the appliance.

• Insulation and other materials must be secured to
prevent accidental contact.

• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fi replace or chimney.

• Failure to maintain airspace may cause overheating and
a fi re.

Note: If the inside of the framed cavity is to be

fi nished, the framing dimensions must include the
fi nished surface. If drywall is to be attached to the

rear wall, the depth must be measured from the
drywall surface.

Drywall

0 in.

D

Clearance to Ceiling

30 in. (762 mm)

36 in.

(914 mm)

Combustible Object

Figure 5.2 Clearances to Combustibles

0 in. TO LEVEL

OF STANDOFFS

0 in.

B

C

A

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1220

D. Mantel and Wall Projections

WARNING! Risk of Fire! Comply with all minimum clear -

ances to combustibles as specifi ed. Framing or fi nishing
material closer than the minimums listed must be construct­ed entirely of non-combustible materials (i.e., steel studs,
concrete board, etc).

Mantels

Note: All

measurements
in inches.

6

5

4

3

6-1/4

5-1/2

5

7-3/4

7

30 in. minimum

to ceiling

18

17

16

15

14

13

12

11

10

9

8

7

9-1/4

8-1/2

10-3/4

10

12-1/4

11-1/2

14-1/2

13-3/4

13

16

15-1/4

Figure 5.3 Minimum Vertical and Maximum Horizontal Dimensions

Mantel Legs or Wall Projections

Top of
Appliance

Measured from top of hood (in inches)

A

B

Perpendicular Wall

1 in. (25 mm) min.

A

to perpendicular wall
3-1/2 in. (89 mm) min.

B

from fireplace opening
to perpendicular wall

Drywall

Mantel Leg or

Figure 5.4 Mantel Leg or Wall Projections (Acceptable on both sides of opening)

21Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

6

6

Termination Locations

A. Vent Termination Minimum Clearances

24 in. min.

(610 mm)

Termination

Cap

Storm Collar

Roof

Flashing

WARNING

Fire Risk.
Maintain vent clearance to combustibles as

specifi ed.

• DO NOT pack air space with insulation or other
materials.

Failure to keep insulation or other materials away
from vent pipe may cause overheating and fi re.

Horizontal
overhang

20 in.

(508 mm)

Lowest

Discharge

Opening

12

H (min.) - Minimum height
from roof to lowest
discharge opening.

Vertical
wall

X

Roof Pitch
is X / 12

6 in. (minimum) up to 20 in.

Gas

Termination

Cap **

If using decorative cap cover(s), this distance may need to be

*

increased. Refer to the installation inst ruc tions supplied with the
decorative cap cover.

In a staggered installation with both gas and wood or fuel oil

**

terminations, the wood or fuel oil termination cap must be
higher than the gas termination cap.

AB

152 mm/508 mm

20 in. and over 0 in. minimum

Gas, Wood or Fuel Oil

Termination Cap

B

A *

18 in. minimum

457 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

Figure 6.1 Minimum Height From Roof To Lowest Discharge
Opening

Figure 6.2 Multiple Termination Caps

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1222

H

D

E

V

L

B

C

Fixed

V

Closed

V

F

B

V

Openable

B

V TERMINATION CAP

V

Fixed

Closed

J

A

B

X

Measure vertical clearances

from this surface

T

Measure horizontal clearances

from this surface.

Covered Alcove

Applications

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 soffi t 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 soffi t - 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 3 ft (.91 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 fl oor. *
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.

Figure 6.3 Minimum Clearances for Termination

O

R

N

V

V

B

X

GAS METER

AIR SUPPLY INLET

Q

P

V

S

M

I

RESTRICTION ZONE
(TERMINATION NOT
ALLOWED)

V

V

K X

U

G

V

A

V

W

lectrical

Service

D*

V

V

U

V

Clearances to Electrical Service

P 6” - Non-vinyl sidewalls
12” – Vinyl sidewalls
Q 18” – Non-vinyl soffi t and overhang
42” – Vinyl soffi t and overhang
R 8 ft.

S

min

T

max

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

S

= # term caps x 3 T

min

= (2/# term caps) x S (actual)

max

U 6” min. – Clearance from sides of electrical service.
W 12” min. – Clearance above electrical service.
* As specifi ed in CGA B149 Installation Codes
Note: Local codes or regulations may require different clearances.
** Clearance required to vinyl soffi t 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. Y ou 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.

CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS SUGGESTED THAT A VINYL PROTECTOR KIT BE INSTALLED.

23Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12

7

7

Pipe

inches

mm

DVP4 4 102

DVP6 6 152
DVP12 12 305
DVP24 24 610
DVP36 36 914
DVP48 48 1219
DVP6A 3 - 6 76 - 152

DVP12A 3 - 12 76 - 305

Effective Height/Length

Pipe

inches

mm

SLP4 4 102

SLP6 6 152
SLP12 12 305
SLP24 24 610
SLP36 36 914
SLP48 48 1219
SLP6A 2 - 6 51 - 152

SLP12A 2 - 12 51 - 305

Effective Height/Length

Vent Information and Diagrams

A. Approved Pipe

This appliance is approved for use with Hearth & Home
Technologies DVP and/or SLP venting systems. Refer to
Section 17.B. for vent component information.

DO NOT mix pipe, fi ttings or joining methods from differ-
ent manufacturers.

The pipe is tested to be run inside an enclosed wall.
There is no requirement for inspection openings at each
joint within the wall.

WARNING! Risk of Fire or Asphyxiation. This appliance

requires a separate vent. DO NOT vent to a pipe serving a
separate solid fuel burning appliance.

B. Vent Table Key

The abbreviations listed in this vent table key are used in
the vent diagrams.

Symbol Description

First section (closest to appliance) of vertical length

V

1

Vertical

12 in.

8-1/2 in.

Horizontal

On 45° runs, 1 ft (.3 m) of diagonal is equal to 8-1/2 in. (216
mm) horizontal run and 8-1/2 in. (216 mm) vertical run.

Figure 7.1 Using Two 45° Elbows

8-1/2 in.

Second section of vertical length

V

2

H
H

First section (closest to appliance) of horizontal length

1

Subsequent sections of horizontal length

2

C. Use of Elbows

Diagonal runs have both vertical and horizontal vent as­pects when calculating the effects. Use the rise for the
vertical aspect and the run for the horizontal aspect (see
Figure 7.1).

Two 45º elbows may be used in place of one 90º elbow.
On 45º runs, one foot of diagonal is equal to 8-1/2 in. (216
mm) horizontal run and 8-1/2 in. (216 mm) vertical run. A
length of straight pipe is allowed between two 45º elbows
(see Figure 7.1).

D. Measuring Standards

Vertical and horizontal measurements listed in the vent
diagrams were made using the following standards.

• Pipe measurements are shown using the effective length
of pipe (see Figure 7.2).

• Horizontal terminations are measured to the outside
mounting surface (fl ange of termination cap) (see
Figure 6.4.).

• Vertical terminations are measured to bottom of
termination cap.

• Horizontal pipe installed level with no rise.

Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1224

Effective

Height/Length

DVP Pipe

(see chart)

Effective

Height/Length

SLP Pipe

(see chart)

Figure 7.2 Pipe Effective Length

E. Vent Diagrams

To replace the fi rst starter elbow with two 45° elbows,
refer to Figure 7.4. All other 90° elbows can be replaced
with two 45° elbows.

General Rules:

• SUBTRACT 3 ft. from the total H measurement for each
90° elbow installed horizontally.

• SUBTRACT 1-1/2 ft. 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 confi guration. Some elbows
may be installed horizontally. See Figure 7.8.

• Elbows may be placed back to back anywhere in the
system as long as the fi rst 90° elbow is a starter elbow
except as shown in Figure 7.4.

• When penetrating a combustible wall, a wall shield
fi restop must be installed.

• When penetrating a combustible ceiling, a ceiling
fi restop must be installed.

• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.

Note: The NNXT series appliances can adapt to
SLP series vent pipe when venting off the top of
the appli ance. You must u se a DVP-SLP24 a dapter
which can only be attached to the appliance starting
collar.

When looking at horizontal termination diagrams, the
adapter is not counted as part of the minimum vertical
(V

min.) requirements.

1

Whether horizontal or vertical termination, the adapter is
counted as part of the maximum vertical limitations.

All venting rules for the vent run must still be followed.

HORIZONTAL EXAMPLE

V1 = 1 ft.

H

= 11 ft.

1

max.

DVP

1. Top Vent - Horizontal Termination

One Elbow

H

1

V1 min. V1 max. H1 max.
ft m ft m ft m
0 0.00 - - 2 0.61

0.33 0.10 - - 4 1.22

0.5 0.15 - - 6 1.83
1 0.30 - - 11 3.35

1.5 0.46 - - 17 5.18
2 0.61 - - 17 5.18
DVP 25 7.62 17 5.18
SLP 23 7.01 17 5.18
You may install the elbow directly on top

of the appliance (DVP only).

V

V1 = 1 ft.

H

= 11 ft.

1

max

1

VERTICAL EXAMPLE

12 ft (3.66 m) min.

60 ft (18.29 m) max.

60 ft (18.29 m) max.

DVP-SLP24

SLP

12 ft (3.66 m) min.

DVP-SLP24

Adapter

Figure 7.3

DVP

SLP

25Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12