Heatilator CD4236-MOD, CD4842-MOD Installation Manual

Installation Manual

Installation and Appliance Setup

INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.

NOTICE: DO NOT discard this manual!

Models:

CD4236-MOD
CD4842-MOD

WARNING:

FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.

• 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.

- Leave the building immediately.

- 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 in the United States, or the
Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.

This appliance is only for use with the type(s)
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases, unless a certifi ed kit is used.

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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

DANGER

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

A barrier designed to reduce the risk of
burns from the hot viewing glass is provided
with this appliance and shall be installed for
the protection of children and other at-risk
individuals.

1

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

Installation Standard Work Checklist . . . . . . . . . . . . . . . . . . . . 3

1 Product Specifi c and Important Safety Information

A. Appliance Certifi cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

B. Glass Specifi cations (Tempered) . . . . . . . . . . . . . . . . . . . . 4

C. BTU Specifi cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . . . . . . 4

E. Non-Combustible Materials Specifi cation. . . . . . . . . . . . . . 5

F. Combustible Materials Specifi cation . . . . . . . . . . . . . . . . . 5

G. Electrical Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

H. Requirements for the Commonwealth of Massachusetts . . 5

2 Getting Started

A. Design and Installation Considerations . . . . . . . . . . . . . . . 7

B. Tools and Supplies Needed . . . . . . . . . . . . . . . . . . . . . . . . 7

C. Inspect Appliance and Components . . . . . . . . . . . . . . . . . . 7

3 Framing and Clearances

A. Appliance/Decorative Front Dimension Diagrams . . . . . . . 8

B. Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . 11

C. Constructing the Appliance Chase . . . . . . . . . . . . . . . . . . 12

4 Termination Location and Vent Information

A. Vent Termination Minimum Clearances . . . . . . . . . . . . . . 13

B. Chimney Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

C. Approved Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

D. Use of Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

E. Measuring Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16



F. Vent Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5 Vent Clearances and Framing

A. Pipe Clearances to Combustibles . . . . . . . . . . . . . . . . . . 23

B. Wall Penetration Framing/Firestops . . . . . . . . . . . . . . . . . 23

C. Ceiling Firestop/Floor Penetration Framing . . . . . . . . . . . 24

D. Install Attic Insulation Shield . . . . . . . . . . . . . . . . . . . . . . . 24

6 Appliance Preparation

A. Vent Collar Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . 25

B. Securing and Leveling the Appliance . . . . . . . . . . . . . . . . 26

C. Non-Combustible Material Installation . . . . . . . . . . . . . . . 26

7 Venting and Chimneys

A. Assemble Vent Sections . . . . . . . . . . . . . . . . . . . . . . . . . 27

B. Assemble Slip Sections . . . . . . . . . . . . . . . . . . . . . . . . . . 28

C. Secure the Vent Sections . . . . . . . . . . . . . . . . . . . . . . . . . 29

D. Disassemble Vent Sections . . . . . . . . . . . . . . . . . . . . . . . 29

E. Vertical Termination Requirements . . . . . . . . . . . . . . . . . . 30

F. Horizontal Termination Requirements . . . . . . . . . . . . . . . 31

8 Electrical Information

A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

B. Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9 Gas Information

A. Fuel Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

C. Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . . . . . 35

E. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

10 Finishing

A. Facing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

B. Finish and Sealing Joints . . . . . . . . . . . . . . . . . . . . . . . . . 37

C. Mantel and Wall Projections . . . . . . . . . . . . . . . . . . . . . . . 38

D. Door Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

11 Appliance Setup

A. Fixed Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

B. Remove the Shipping Materials . . . . . . . . . . . . . . . . . . . . 40

C. Clean the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

D. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

E. Optional Glass Panel Installation . . . . . . . . . . . . . . . . . . . 40

F. Media Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

G. Install Trim and/or Surround . . . . . . . . . . . . . . . . . . . . . . . 42

12 Reference Materials

A. Vent Components Diagrams . . . . . . . . . . . . . . . . . . . . . . 43

B. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 2

 = Contains updated information.

Installation Standard Work Checklist

ATTENTION INSTALLER:

Follow this Standard Work Checklist

7KLVVWDQGDUGZRUNFKHFNOLVW LV WREHXVHGE\WKH LQVWDOOHU LQFRQMXQFWLRQZLWKQRW LQVWHDG RI WKHLQVWUXFWLRQVFRQWDLQHGLQ WKLV
LQVWDOODWLRQPDQXDO

Customer:
Lot/Address:

Model (circle one): CD4236-MOD, CD4842-MOD

WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions could

OHDGWRD¿UHRUH[SORVLRQ

Appliance Install Sections 3 and 6 YES IF NO, WHY?

9HUL¿HGWKDWWKHFKDVHLVLQVXODWHGDQGVHDOHG3J  BBBBBBBBBBBBBBBBBBBBBBBBBBB
5HTXLUHGQRQFRPEXVWLEOHERDUGLVLQVWDOOHG  BBBBBBBBBBBBBBBBBBBBBBBBBBB
9HUL¿HGFOHDUDQFHVWRFRPEXVWLEOHV3J  BBBBBBBBBBBBBBBBBBBBBBBBBBB
)LUHSODFHLVOHYHOHGDQGVHFXUHG3J  BBBBBBBBBBBBBBBBBBBBBBBBBBB

Venting/Chimney Section 4,5 and 7

9HQWLQJFRQ¿JXUDWLRQFRPSOLHVWRYHQWGLDJUDPV3J  BBBBBBBBBBBBBBBBBBBBBBBBBBB
9HQWLQJLQVWDOOHGORFNHGDQGVHFXUHGLQSODFHZLWKSURSHUFOHDUDQFH  BBBBBBBBBBBBBBBBBBBBBBBBBBB
)LUHVWRSVLQVWDOOHG6HFWLRQ  BBBBBBBBBBBBBBBBBBBBBBBBBBB
$WWLFLQVXODWLRQVKLHOGLQVWDOOHG3J  BBBBBBBBBBBBBBBBBBBBBBBBBBB
([WHULRUZDOO5RRIÀDVKLQJLQVWDOOHGDQGVHDOHG6HFWLRQ  BBBBBBBBBBBBBBBBBBBBBBBBBBB
7HUPLQDWLRQVLQVWDOOHGDQGVHDOHG6HFWLRQ  BBBBBBBBBBBBBBBBBBBBBBBBBBB

Date Installed:
Location of Fireplace:
Installer:
Dealer/Distributor Phone #

Serial #:

Electrical Section 8 (Pg. 33-34)

8QVZLWFKHGSRZHU9$&SURYLGHGWRWKHDSSOLDQFH BBBBBBBBBBBBBBBBBBBBBBBBBBB
6ZLWFKZLUHVSURSHUO\LQVWDOOHG  BBBBBBBBBBBBBBBBBBBBBBBBBBB

Gas Section 9 (Pg. 35-36)

3URSHUDSSOLDQFHIRUIXHOW\SH  BBBBBBBBBBBBBBBBBBBBBBBBBBB
:DVDFRQYHUVLRQSHUIRUPHG"  BBBBBBBBBBBBBBBBBBBBBBBBBBB
/HDNFKHFNSHUIRUPHGDQGLQOHWSUHVVXUHYHUL¿HG  BBBBBBBBBBBBBBBBBBBBBBBBBBB
9HUL¿HGSURSHUDLUVKXWWHUVHWWLQJIRULQVWDOODWLRQW\SH  BBBBBBBBBBBBBBBBBBBBBBBBBBB

Finishing Section 10 (Pg. 37-39)

&RPEXVWLEOHPDWHULDOVQRW LQVWDOOHGLQQRQFRPEXVWLEOHDUHDV  BBBBBBBBBBBBBBBBBBBBBBBBBBB
9HUL¿HGDOOFOHDUDQFHVPHHWLQVWDOODWLRQPDQXDOUHTXLUHPHQWV  BBBBBBBBBBBBBBBBBBBBBBBBBBB
0DQWHOVDQGZDOOSURMHFWLRQVFRPSO\ZLWKLQVWDOODWLRQPDQXDOUHTXLUHPHQWV BBBBBBBBBBBBBBBBBBBBBBBBBBB

Appliance Setup Section 11 (Pg. 40-42)

$OOSDFNDJLQJDQGSURWHFWLYHPDWHULDOVUHPRYHGLQVLGHRXWVLGHRIDSSOLDQFH BBBBBBBBBBBBBBBBBBBBBBBBBBB
5HIUDFWRULHVORJVPHGLDDQGHPEHUVLQVWDOOHGFRUUHFWO\  BBBBBBBBBBBBBBBBBBBBBBBBBBB
*ODVVDVVHPEO\LQVWDOOHGDQGVHFXUHG  BBBBBBBBBBBBBBBBBBBBBBBBBBB
$FFHVVRULHVLQVWDOOHGSURSHUO\  BBBBBBBBBBBBBBBBBBBBBBBBBBB
0HVKGRRUVRUGHFRUDWLYHIURQWSURSHUO\LQVWDOOHG  BBBBBBBBBBBBBBBBBBBBBBBBBBB
0DQXDOEDJDQGDOORILWVFRQWHQWVDUHUHPRYHGIURPLQVLGHXQGHU
WKHDSSOLDQFHDQGJLYHQWRSDUW\UHVSRQVLEOHIRUXVHDQGRSHUDWLRQ  BBBBBBBBBBBBBBBBBBBBBBBBBBB
6WDUWHGDSSOLDQFHDQGYHUL¿HGQR JDVOHDNVH[LVW  BBBBBBBBBBBBBBBBBBBBBBBBBBB

Hearth & Home Technologies recommends the following:

3KRWRJUDSKLQJWKHLQVWDOODWLRQDQGFRS\LQJWKLVFKHFNOLVWIRU\RXU¿OH
7KDWWKLVFKHFNOLVWUHPDLQYLVLEOHDWDOOWLPHVRQWKHDSSOLDQFHXQWLOWKHLQVWDOODWLRQLVFRPSOHWH

Comments:)XUWKHUGHVFULSWLRQRIWKHLVVXHVZKRLVUHVSRQVLEOH,QVWDOOHU%XLOGHU2WKHU7UDGHVHWFDQGFRUUHFWLYH
DFWLRQQHHGHGBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
&RPPHQWV&RPPXQLFDWHGWRSDUW\UHVSRQVLEOHBBBBBBBBBBBBBBBBBBBBE\BBBBBBBBBBBBBBBBBBBBBBRQBBBBBBBBBBB 
  %XLOGHU*HQ&RQWUDFWRU,QVWDOOHU 'DWH

Î &RQWDLQVXSGDWHGLQIRUPDWLRQ

3DUW

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

3

1

1

Product Specifi c and Important Safety Information

C. BTU Specifi cationsA. Appliance Certifi cation

MODELS: CD4236-MOD, CD4842-MOD
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vented Gas Fireplace

STANDARD:

ANSI Z21.50-2014 • CSA 2.22-2014

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.

Installation and service of this appliance should be
performed by qualifi ed personnel. Hearth & Home
Technologies suggests NFI certifi ed or factory
trained professionals, or technicians supervised by
an NFI certifi ed professional (www.nfi certifi ed.org).

B. Glass Specifi cations (Tempered)

Hearth & Home Technologies appliances manufactured
with tempered glass may be installed in hazardous lo­cations such as bathtub enclosures as defi ned by the
Consumer Product Safety Commission (CPSC). The
tempered glass has been tested and certifi ed to the re-
quirements of ANSI Z97.1 and CPSC 16 CFR 1202
(Safety Glazing Certifi cation Council SGCC# 1595 and

1597. Architectural Testing, Inc. Reports 02-31919.01
and 02-31917.01).

This statement is in compliance with CPSC 16 CFR Sec-
tion 1201.5 “Certifi cation and labeling requirements”
which refers to 15 U.S. Code (USC) 2063 stating “…Such
certifi cate shall accompany the product or shall otherwise
be furnished to any distributor or retailer to whom the
product is delivered.”

Some local building codes require the use of tempered
glass with permanent marking in such locations. Glass
meeting this requirement is available from the factory.
Please contact your dealer or distributor to order.

Models

(U.S. or Canada)

CD4236-MOD

(NG)

CD4236-MOD

(LP)

CD4842-MOD

(NG)

CD4842-MOD

(LP)

US

(0-2000 FT)

CANADA

(2000-4500 FT)

US

(0-2000 FT)

CANADA

(2000-4500 FT)

US

(0-2000 FT)

CANADA

(2000-4500 FT)

US

(0-2000 FT)

CANADA

(2000-4500 FT)

Maximum

Input

BTU/h

28,000 19,000 40

25,200 17,100 41

20,000 14,000 55

18,000 12,000 56

32,000 22,000 35

28,800 19,800 36

22,000 15,000 54

20,000 14,000 55

Minimum

Input

BTU/h

Orifi ce

Size

(DMS)

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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 4

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 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 ignite
and burn, whether fl ame proofed or not, or plastered or
unplastered shall be considered combustible materials.

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.

G. Electrical Codes

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 110-120 VAC circuit for this product must be pro-

tected 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.

Note: The following requirements reference various
Massachusetts and national codes not contained 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 monoxide 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 professionals for the installation of
hard wired carbon monoxide detectors.

Signage

A metal or plastic identifi cation plate shall be permanent-
ly 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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

5

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 identifi 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 • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 6

2

2

Getting Started

A. 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 requirements.

• Electrical wiring requirements.

• Framing and fi nishing details.

• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.

Installation and service of this appliance should be
performed by qualifi ed personnel. Hearth & Home
Technologies suggests NFI certifi ed or factory
trained professionals, or technicians supervised by
an NFI certifi ed professional (www.nfi certifi ed.org).

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.

B. Tools and Supplies Needed

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

Tape measure Framing material
Pliers Hammer
Phillips screwdriver Manometer
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Flat blade screwdriver
Non-corrosive leak check solution
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
Caulking material (300 ºF minimum continuous exposure

rating)
One 1/4 in. female connection (for optional fan).

C. 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.

• Media 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 instal-

lation. 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, in-
complete 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 media 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

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

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

7

3

3

A

B

C

D

E

FRONT VIEW

TOP VIEW

LEFT SIDE RIGHT SIDE

F

G

H

I

J

K

L

O

P

GAS LINE

ACCESS

Q

R

N

Framing and Clearances

A. Appliance/Decorative Front Dimension Diagrams

Dimensions are actual appliance dimensions. Use for reference only. For framing dimensions and clearances refer to Section 5.

Location Inches Millimeters

A 41 1041

B 36-1/8 918

C 33-1/2 851

D 34-5/8 879

E 2-1/4 57

Figure 3.1 Appliance Dimensions - CD4236-MOD

F 9-11/16 246

G 26-7/8 683

H 6 dia 152

I 39-7/8 1013

Location Inches Millimeters

J 21 533

K 11-11/16 297

L 28-1/2 724

M 14-1/4 362

N 8-1/2 216

O 2-7/8 73

P 8-1/2 216

Q1 25

R 40-7/8 1038

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 8

GAS LINE

ACCESS

L

M

J

N

TOP VIEW

R

K

H

D

C

I

G

LEFT SIDE

O

P

Location Inches Millimeters

Q

FRONT VIEW

A 48 1219

B 43-1/8 1096

C 35-1/2 902

D 36-5/8 930

E 2-3/8 60

F 9-15/16 252

G 28-7/8 734

H 6 152

I 41-7/8 1064

B

A

Location Inches Millimeters

J 21 533

K 11-11/16 297

L 35-1/2 901

M 17-3/4 451

N 8-1/2 216

O 2-7/8 73

P 8-1/2 216

Q1 25

R 42-7/8 1089

E

F

RIGHT VIEW

Figure 3.2 Appliance Dimensions - CD4842-MOD

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

9

Decorative Front Dimension

SIMON DECORATIVE FRONTS

32 1/32 in.

SIM-36

Figure 3.3 SIM-36 Simon Decorative Front Dimensions

33 15/16 in.

35 25/32 in.

SIM-42

Figure 3.4 SIM-42 Simon Decorative Front Dimensions

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 10

42 13/16 in.

B. Clearances to Combustibles

When selecting a location for the appliance it is important

to consider the required clearances to walls (see Figure

3.5).

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.

NOTE: THE REAR STANDOFF MAY NEED

TO BE REMOVED WHEN VENTING AT 45º

A

1/2 IN.

F

A

B

C

TOP VENT

ONE 90º ELBOW

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.

B

ALCOVE

INSTALLATION

D

CD4236-MOD

CD4842-MOD

Figure 3.5 Appliance Locations

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

in. 51 42 72

mm 1295 1067 1829 559 451

in. 55-7/8 49 79

mm 1419 1245 2007 559 502

B

E

ABC D E F

See Section 10.C.

Mantel Projections

See Section 10.C.

Mantel Projections

22 17-3/4

22 19-3/4

11

C. Constructing 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 be enclosed inside the chase.

NOTICE: Treatment of ceiling fi restops and wall shield
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.

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 (or an equivalent method may be
used) to achieve maximum air tightness.

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

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:

• 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.

A

B

F

C

D

* MINIMUM FRAMING DIMENSIONS

AB C DE F G H I J

Models

CD4236-MOD

CD4842-MOD

Rough

Opening

(Width)

in. 10 40-1/8 22 42 25 0 0 1/2 1/2 36

mm 254 1019 559 1067 635 0 0 13 13 914

in. 10 42-1/8 22 49 25 0 0 1/2 1/2 36

mm 254 1070 559 1245 635 0 0 13 13 914

* Adjust framing dimensions for interior sheathing (such as sheetrock)

Rough

Opening

(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to Ceiling

Combustible

Floor

J

G

Combustible

Flooring

I

Behind

Appliance

Sides of

Appliance

E

H

Front of

Appliance

Figure 3.6 Clearances to Combustibles

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 12

4

4

Termination Location and Vent Information

A. Vent Termination Minimum Clearances

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 could cause overheating and fi re.

6 in. (minimum) up to 20 in.

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

HORIZONTAL

OVERHANG

2 FT.
MIN.

GAS DIRECT VENT
TERMINATION CAP

Roof Pitch H (Min.) Ft.

Flat to 6/12...........................................................1.0*

Over 6/12 to 7/12 .................................................1.25*

Over 7/12 to 8/12 .................................................1.5*

Over 8/12 to 9/12 .................................................2.0*

Over 9/12 to 10/12 ...............................................2.5*

Over 10/12 to 11/12 .............................................3.25

Over 11/12 to 12/12 .............................................4.0

Over 12/12 to 14/12 .............................................5.0

Over 14/12 to 16/12 .............................................6.0

Over 16/12 to 18/12 .............................................7.0

Over 18/12 to 20/12 .............................................7.5

Over 20/12 to 21/12 .............................................8.0

* 3 foot minimum in snow regions

Figure 4.1 Minimum Height From Roof to Lowest Discharge
Opening

20 INCHES MIN.

LOWEST

DISCHARGE

OPENING

H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

X

12

ROOF PITCH

VERTICAL

WALL

IS X/ 12

Gas

Termination

Cap **

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

*

increased. Refer to the installation instructions 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.

Figure 4.2 Staggered Termination Caps

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

13

B. Chimney Diagram

C

V

B

J

V

V

= VENT TERMINAL

X

= AIR SUPPLY INLET

B

D

V

V

V

A

= AREA WHERE TERMINAL IS NOT PERMITTED

A = 12 inches.................clearances above grade, veranda,

porch, deck or balcony

12 inches.................clearance to window or door that may

B =

be opened, or to permanently closed
window

C = 18 inches.................clearance below unventilated soffi t

18 inches.................clearance below ventilated soffi t

30

inches .................clearance below vinyl soffits and

electrical service

D = 9 inches...................clearance to outside corner

E = 6 inches...................clearance to inside corner

F = 3 ft. (Canada) ..........not to be installed above a gas me-

ter/regulator assembly within 3 feet
horizontally from the center-line of the
regulator

G = 3 ft ...........................clearance to gas service regulator

vent outlet

H = 9 inches (U.S.A)

12 inches (Canada). clearance to non-mechanical (unpow-

ered) air supply inlet, combustion air

inlet or direct-vent termination
i = 3 ft. (U.S.A.)

6 ft. (Canada) ...........clearance to a mechanical (powered)

air supply inlet
All mechanical air intakes within 10 feet of a termination cap
must be a minimum of 3 feet below termination.

J = 7 ft. ......................... On public property: clearance above

paved sidewalk or a paved driveway.
A vent shall not terminate directly above a sidewalk or paved

driveway which is located between two single family dwellings
and serves both dwellings.

K = 6 inches................. clearance from sides of electrical

service

L = 12 inches................ clearance above electrical service

Location of the vent termination must not interfere with access to the
electrical service.

M = 18 inches ................... clearance under veranda, porch, deck,

balcony or overhang

42 inches ................vinyl or composite overhang

Permitted when veranda, porch, deck or balcony is fully open

on a minimum of 2 sides beneath the fl oor.

Figure 4.3 Minimum Clearances for Termination

F

B

G

M

O

N

P

R

Q

H or i

V

X

H

V

V

H

E

V

V

A

V

K

V

L

Electrical

Service

C

V

K

V

Covered Alcove Applications

(Spaces open only on one side and with an overhang)

N = 6 inches ........... non-vinyl sidewalls

12 inches ......... vinyl sidewalls

O = 18 inches ......... non-vinyl soffi t and overhang

42 inches ......... vinyl soffi t and overhang

P = 8 ft.

Q

MIN

1 cap 3 feet 2 x Q

2 caps 6 feet 1 x Q

3 caps 9 feet 2/3 x Q

4 caps 12 feet 1/2 x Q

Q

= # termination caps x 3 R

MIN

Measure vertical clearances from this surface.

Measure horizontal clearances from this surface.

= (2 / # termination caps) x Q

MAX

R

MAX

ACTUAL

ACTUAL

ACTUAL

ACTUAL

ACTUAL

CAUTION! Risk of Burns! Termination caps are HOT,
consider proximity to doors, traffi c areas or where people
may pass or gather (sidewalk, deck, patio, etc.). Listed cap
shields available. Contact your dealer.

• Local codes or regulations may require different
clearances.

• Vent system termination is NOT permitted in screened
porches.

• Vent system termination is permitted in porch areas with
two or more sides open.

• Hearth & Home Technologies assumes no responsibility
for the improper performance of the appliance when the
venting system does not meet these requirements.

• Vinyl protection kits are suggested for use with vinyl siding.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 14

C. Approved Pipe

This appliance is approved for use with Hearth & Home
Technologies DVP or SLP venting systems. Refer to Sec­tion 12.A for vent component information and dimensions.

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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15

15

D. 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 4.4.

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 4.4.

Figure 4.5 shows the vertical and horizontal offsets for
DVP or SLP elbows.

Y

X

VERTICAL

EFFECTIVE

LENGTH

RUN

HORIZONTAL

SLP

Pipe

SLP4 4 102 2-3/4 70

SLP6 6 152 4-1/4 108

SLP12 12 305 8-1/2 216

SLP24 24 610 17 432

SLP36 36 914 25-1/2 648

SLP48 48 1219 34 864

SLP6A 3 to 6 76 to 152

SLP12A 3 to 12 76 to 305

DVP
Pipe

DVP4 4 102 2-3/4 70

DVP6 6 152 4-1/4 108

DVP12 12 305 8-1/2 216

DVP24 24 610 17 432

DVP36 36 914 25-1/2 648

DVP48 48 1219 34 864

DVP6A 3 to 6 76 to 152

DVP12A 3 to 12 76 to 305

Figure 4.4

Effective Length Rise/Run

Inches Millimeters Inches Millimeters

2-1/8-4-1/4 54-108

2-1/8-8-1/2 54-216

Effective Length Rise/Run

Inches Millimeters Inches Millimeters

2-1/8-4-1/4 54-108

2-1/8-8-1/2 54-216

RISE

Vent
Type

DVP 4-1/2 114 17 432

SLP 5 127 11-3/4 298

Inches Millimeters Inches Millimeters

XY

X

X

Vent Type

DVP 16-1/4 413

SLP 11-1/4 286

Figure 4.5 Vertical and Horizontal Offset for DVP and SLP Elbows

Inches Millimeters

X

E. 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 Section 12.A (Figure 12.1 for DVP, Figure

12.6 for SLP) for information on effective length of pipe
components.

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

4.3).

• Vertical terminations are measured to bottom of
termination cap.

• Horizontal pipe installed level with no rise.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15 16