Heatilator CD4236-MOD User manual

1
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
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!
In the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fitter.
See Table of Contents for location of additional Commonwealth
of Massachusetts requirements.
• DO NOT store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
• What to do if you smell gas
- DO NOT try to light any appliance.
- DO NOT touch any electrical switch. DO
NOT use any phone in your building.
- Leave the building immediately.
- Immediately call your gas supplier from
a neighbor’s phone. Follow the gas sup-
plier’s instructions.
- If you cannot reach your gas supplier, call
the fire department.
• Installation and service must be performed
by a qualified installer, service agency, or the
gas supplier.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
Models:
CD4236-MOD
CD4842-MOD
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 certified kit is used.
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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/152
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 Specific and Important Safety Information
A. Appliance Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
B. Glass Specifications (Tempered) . . . . . . . . . . . . . . . . . . . . 4
C. BTU Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . . . . . . 4
E. Non-Combustible Materials Specification. . . . . . . . . . . . . . 5
F. Combustible Materials Specification . . . . . . . . . . . . . . . . . 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
= Contains updated information.


3
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
Installation Standard Work Checklist
Appliance Install Sections 3 and 6 YES IF NO, WHY?
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Customer:
Lot/Address:
Model (circle one): CD4236-MOD, CD4842-MOD
Date Installed:
Location of Fireplace:
Installer:
Dealer/Distributor Phone #
Serial #:
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ATTENTION INSTALLER:
Follow this Standard Work Checklist

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/154
1
1 Product Specific and Important Safety Information
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
orifice size.
B. Glass Specifications (Tempered)
Hearth & Home Technologies appliances manufactured
with tempered glass may be installed in hazardous lo-
cations such as bathtub enclosures as defined by the
Consumer Product Safety Commission (CPSC). The
tempered glass has been tested and certified to the re-
quirements of ANSI Z97.1 and CPSC 16 CFR 1202
(Safety Glazing Certification Council SGCC# 1595 and
1597. Architectural Testing, Inc. Reports 02-31919.01
and 02-31917.01).
This statement is in compliance with CPSC 16 CFR Sec-
tion 1201.5 “Certification and labeling requirements”
which refers to 15 U.S. Code (USC) 2063 stating “…Such
certificate shall accompany the product or shall otherwise
be furnished to any distributor or retailer to whom the
product is delivered.”
Some local building codes require the use of tempered
glass with permanent marking in such locations. Glass
meeting this requirement is available from the factory.
Please contact your dealer or distributor to order.
C. BTU SpecificationsA. Appliance Certification
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heat or as a decorative appliance. It should not be
factored as primary heat in residential heating calculations.
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.
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
Technologies suggests NFI certified or factory
trained professionals, or technicians supervised by
an NFI certified professional (www.nficertified.org).
This product is listed to ANSI standards for “Vented Gas
Fireplace Heaters” and applicable sections of “Gas Burn-
ing Heating Appliances for Manufactured Homes and
Recreational Vehicles”, and “Gas Fired Appliances for
Use at High Altitudes”.
MODELS: CD4236-MOD, CD4842-MOD
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vented Gas Fireplace
STANDARD: ANSI Z21.50-2014 • CSA 2.22-2014
Models
(U.S. or Canada)
Maximum
Input
BTU/h
Minimum
Input
BTU/h
Orifice
Size
(DMS)
CD4236-MOD
(NG)
US
(0-2000 FT) 28,000 19,000 40
CANADA
(2000-4500 FT) 25,200 17,100 41
CD4236-MOD
(LP)
US
(0-2000 FT) 20,000 14,000 55
CANADA
(2000-4500 FT) 18,000 12,000 56
CD4842-MOD
(NG)
US
(0-2000 FT) 32,000 22,000 35
CANADA
(2000-4500 FT) 28,800 19,800 36
CD4842-MOD
(LP)
US
(0-2000 FT) 22,000 15,000 54
CANADA
(2000-4500 FT) 20,000 14,000 55

5
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
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 finished grade in the area of the venting, in-
cluding but not limited to decks and porches, the following
requirements shall be satisfied:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gas fitter
shall observe that a hard wired carbon monoxide detector
with an alarm and battery back-up is installed on the floor
level where the gas equipment is to be installed. In addi-
tion, the installing plumber or gas fitter shall observe that
a battery operated or hard wired carbon monoxide detec-
tor 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 qualified licensed professionals for the installation of
hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fu-
eled 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
floor 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 dur-
ing 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 accor-
dance with the above provisions shall comply with NFPA
720 and be ANSI/UL 2034 listed and IAS certified.
Signage
A metal or plastic identification 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 fu-
eled 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 OB-
STRUCTIONS”.
Inspection
The state or local gas inspector of the side wall horizon-
tally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector ob-
serves 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 fu-
eled equipment installed in a room or structure separate
from the dwelling, building or structure used in whole or
in part for residential purposes.
Note: The following requirements reference various
Massachusetts and national codes not contained in this
document.
E. Non-Combustible Materials Specification
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 Specification
Materials made of or surfaced with wood, compressed pa-
per, plant fibers, plastics, or other material that can ignite
and burn, whether flame proofed or not, or plastered or
unplastered shall be considered combustible materials.
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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/156
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 pro-
vide the parts for venting the flue gases, but identifies
“special venting systems”, the following requirements
shall be satisfied by the manufacturer:
• The referenced “special venting system” instructions
shall be included with the appliance or equipment in-
stallation instructions; and
• The “special venting systems” shall be Product Ap-
proved by the Board, and the instructions for that sys-
tem shall include a parts list and detailed installation
instructions.
A copy of all installation instructions for all Product Ap-
proved side wall horizontally vented gas fueled equip-
ment, 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 Common-
wealth of Massachusetts requirements.

7
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
2
2 Getting Started
A. Design and Installation Considerations
Heatilator direct vent gas appliances are designed to op-
erate with all combustion air siphoned from outside of the
building and all exhaust gases expelled to the outside. No
additional outside air source is required.
Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, fire officials or authorities having
jurisdiction over restrictions, installation inspection and
permits.
Before installing, determine the following:
• Where the appliance is to be installed.
• The vent system configuration to be used.
• Gas supply piping requirements.
• Electrical wiring requirements.
• Framing and finishing details.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
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 benefit.
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in-
complete or substitute components. Keep appliance dry.
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).
Hearth & Home Technologies disclaims any responsibility for,
and the warranty will be voided by, the following actions:
• Installation and use of any damaged appliance or vent
system component.
• Modification of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the 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 fire hazard.
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under
water. Call a qualified service technician to inspect the
appliance and to replace any part of the control system
and/or gas control which has been under water.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualified
service technician, service agency or your dealer.
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
Technologies suggests NFI certified or factory
trained professionals, or technicians supervised by
an NFI certified professional (www.nficertified.org).

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/158
3
3 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.
Figure 3.1 Appliance Dimensions - CD4236-MOD
A
B
CD
E
FRONT VIEW
TOP VIEW
LEFT SIDE RIGHT SIDE
F
G
H
I
J
K
L
O
P
GAS LINE
ACCESS
Q
R
N
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
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
F 9-11/16 246
G 26-7/8 683
H 6 dia 152
I 39-7/8 1013

9
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
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
Location Inches Millimeters
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
TOP VIEW
J
K
L
M
N
LEFT SIDE
O
GAS LINE
ACCESS
P
A
B
CD
FRONT VIEW
Q
R
E
F
G
H
I
RIGHT VIEW
Figure 3.2 Appliance Dimensions - CD4842-MOD

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/1510
Decorative Front Dimension
32 1/32 in.
35 25/32 in.
33 15/16 in.
42 13/16 in.
SIMON DECORATIVE FRONTS
SIM-36
SIM-42
Figure 3.3 SIM-36 Simon Decorative Front Dimensions
Figure 3.4 SIM-42 Simon Decorative Front Dimensions

11
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
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 lo-
cated out of traffic and away from furniture and draperies.
NOTICE: Illustrations reflect typical installations and are
FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale. Actual installation may vary due to
individual design preference.
Figure 3.5 Appliance Locations
ABC D E F
CD4236-MOD in. 51 42 72 See Section 10.C.
Mantel Projections
22 17-3/4
mm 1295 1067 1829 559 451
CD4842-MOD in. 55-7/8 49 79 See Section 10.C.
Mantel Projections
22 19-3/4
mm 1419 1245 2007 559 502
1/2 IN.
ALCOVE
INSTALLATION
TOP VENT
ONE 90º ELBOW
A
BC
B
D
B
E
F
A
NOTE: THE REAR STANDOFF MAY NEED
TO BE REMOVED WHEN VENTING AT 45º

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/1512
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 firestops and wall shield
firestops 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 out-
side walls of the home to prevent cold air drafting prob-
lems. The chase should not break the outside building
envelope in any manner.
Walls, ceiling, base plate and cantilever floor of the chase
should be insulated. Vapor and air infiltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infiltration may be an issue, the inside surfaces may be
sheetrocked and taped (or an equivalent method may be
used) to achieve maximum air tightness.
Figure 3.6 Clearances to Combustibles
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 specified 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 fireplace or chimney.
• Failure to maintain airspace may cause overheating and
a fire.
To further prevent drafts, the wall shield and ceiling fire-
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.
* Adjust framing dimensions for interior sheathing (such as sheetrock)
F
G
H
I
J
E
C
B
D
A
* MINIMUM FRAMING DIMENSIONS
Models
AB C DE F G H I J
Rough
Opening
(Width)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling
Combustible
Floor
Combustible
Flooring
Behind
Appliance
Sides of
Appliance
Front of
Appliance
CD4236-MOD 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
CD4842-MOD 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

13
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
A. Vent Termination Minimum Clearances
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
Figure 4.1 Minimum Height From Roof to Lowest Discharge
Opening
* 3 foot minimum in snow regions
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
4
4 Termination Location and Vent Information
Fire Risk.
Maintain vent clearance to combustibles as
specified.
• 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 fire.
WARNING
Figure 4.2 Staggered Termination Caps
Gas, Wood or Fuel Oil
Termination Cap
B
Gas
Termination
Cap **
A *
*If using decorative cap cover(s), this distance may need to be
increased. Refer to the installation instructions supplied with the
decorative cap cover.
**
AB
6 in. (minimum) up to 20 in.
152 mm/508 mm
18 in. minimum
457 mm
20 in. and over 0 in. minimum
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.

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/1514
B. Chimney Diagram
Figure 4.3 Minimum Clearances for Termination
O
N
P
R
Q
X= AIR SUPPLY INLET
A = 12 inches.................clearances above grade, veranda,
porch, deck or balcony
B =
12 inches.................clearance to window or door that may
be opened, or to permanently closed
window
C = 18 inches.................clearance below unventilated soffit
18 inches.................clearance below ventilated soffit
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.
V= VENT TERMINAL
= AREA WHERE TERMINAL IS NOT PERMITTED
C
JB
D
B
F
B
A
E
V
V
V
V
V
V
M
H or i
V
G
X
VH
A
VV
H
Electrical
Service
V
K
V K
V
L
C
V
N = 6 inches ........... non-vinyl sidewalls
12 inches ......... vinyl sidewalls
O = 18 inches ......... non-vinyl soffit and overhang
42 inches ......... vinyl soffit and overhang
P = 8 ft.
QMIN RMAX
1 cap 3 feet 2 x Q ACTUAL
2 caps 6 feet 1 x Q ACTUAL
3 caps 9 feet 2/3 x Q ACTUAL
4 caps 12 feet 1/2 x Q ACTUAL
QMIN = # termination caps x 3 RMAX = (2 / # termination caps) x QACTUAL
Covered Alcove Applications
(Spaces open only on one side and with an overhang)
Measure horizontal clearances from this surface.
Measure vertical clearances from this surface.
CAUTION! Risk of Burns! Termination caps are HOT,
consider proximity to doors, traffic 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.
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 floor.
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.

15
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
C. Approved Pipe
This appliance is approved for use with Hearth & Home
Technologies DVP or SLP venting systems. Refer to Sec-
tion 12.A for vent component information and dimensions.
DO NOT mix pipe, fittings 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 appli-
ance 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 • 6/1516
D. Use of Elbows
Diagonal runs have both vertical and horizontal vent as-
pects 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.
Figure 4.4
HORIZONTAL
VERTICAL
RUN
RISE
EFFECTIVE
LENGTH
Y
X
X
X
DVP
Pipe
Effective Length Rise/Run
Inches Millimeters Inches Millimeters
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 2-1/8-4-1/4 54-108
DVP12A 3 to 12 76 to 305 2-1/8-8-1/2 54-216
Vent Type X
Inches Millimeters
DVP 16-1/4 413
SLP 11-1/4 286
Figure 4.5 Vertical and Horizontal Offset for DVP and SLP Elbows
Vent
Type
XY
Inches Millimeters Inches Millimeters
DVP 4-1/2 114 17 432
SLP 5 127 11-3/4 298
SLP
Pipe
Effective Length Rise/Run
Inches Millimeters Inches Millimeters
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 2-1/8-4-1/4 54-108
SLP12A 3 to 12 76 to 305 2-1/8-8-1/2 54-216 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 (flange of termination cap) (see Figure
4.3).
• Vertical terminations are measured to bottom of
termination cap.
• Horizontal pipe installed level with no rise.

17
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
General Rules:
• SUBTRACT 3 ft. from the total H measurement for each
90º elbow installed horizontally.
• SUBTRACT 1-1/2 ft. from the total H measurement for
each 45º elbow installed horizontally.
• A maximum of three 90º elbows (or six 45º elbows) may
be used in any vent configuration. Some elbows may be
installed horizontally. See Figure 4.15.
• When penetrating a combustible wall, a wall shield
firestop must be installed.
• When penetrating a combustible ceiling, a ceiling firestop
must be installed.
• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.
• Horizontal termination cap should have a 1/4 inch
downward slant to allow any moisture in cap to be
released. See Figure 4.6.
F. Vent Diagrams
Figure 4.6
1/4 in. max.
(6 mm)
:
$
/
/


Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/1518
Figure 4.7
Top Vent - Horizontal Termination
H1
V1
Top Vent - Horizontal Termination
One Elbow
Note: For corner installations: A 6 inch (152
mm) section of straight pipe may need to
be attached to the appliance before a 90º
elbow, to allow the vent pipe to clear the top
standoffs.
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles
between ceiling firestops.
• ALWAYS maintain specified clearances around
venting and firestop systems.
• Install wall shield and ceiling firestops as speci-
fied.
Failure to keep insulation or other material away
from vent pipe may cause fire.
Example: DVP pipe 3 ft. min. vertical = 11 ft. max. horizontal
SLP pipe 7 ft. min. vertical = 11 ft. max. horizontal
Fire Risk.
• When using DVP-HRC-SS and DVP-HRC-ZC-
SS termination caps on top vented fireplaces, a
6 inch minimum vertical vent section is required
before installing first elbow.
WARNING
WARNING
Note: The CD4236-MOD, CD4842-MOD series fireplaces can
adapt to SLP series vent pipe, if desired.
When venting off the top of the unit, use a DVP-2SL adapter and a
minimum 48 inch vertical section of SLP series vent pipe.
A DVP-SLP24 adapter may also be used with a 24 inch vertical
section of SLP series vent pipe.
After the 48 inch vertical section, the venting table rules must be
followed. The first 48 inch vertical section is NOT counted as part
of the vertical components in the table. It is still counted as part of
the overall maximum run. All venting table rules for the vent run
must still be followed.
CD4842-MOD
V1Minimum H1Maximum
Elbow Only 2 ft. 610 mm
1 ft. 305 mm 3 ft. 914 mm
2 ft. 610 mm 6 ft. 1.8 m
3 ft. 914 mm 11 ft. 3.4 m
4 ft. 1.2 m 20 ft. 6.1 m
V1+ H1= 40 ft. (12.2 m) Maximum
H1= 20 ft. (6.1 m) Maximum
CD4236-MOD
V1Minimum H1Maximum
Elbow only 2 ft 610 mm
6 in. 152 mm 4 ft. 1.2 m
1 ft. 305 mm 6 ft. 1.8 m
1-1/2 ft. 457 mm 10 ft. 3.0 m
2 ft. 610 m 15 ft. 4.6 m
2-1/2 ft. 762 mm 18 ft. 5.5 m
3 ft. 914 mm 20 ft. 6.1 m
V1+ H1= 40 ft. (12.2 m) Maximum
H1= 20 ft. (6.1 m) Maximum

19
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
Figure 4.8
Top Vent - Horizontal Termination - (continued)
Two Elbows
Note: For corner installations: A 6 inch
(152 mm) section of straight pipe may
need to be attached to the appliance
before a 90º elbow, to allow the vent
pipe to clear the top standoffs.
CD4236-MOD
V1Minimum H1+ H2Maximum
Elbow only Not allowed
6 in. 152 mm 2 ft. 610 mm
1 ft. 305 mm 4 ft. 1.2 m
1-1/2 ft. 457 mm 11 ft. 3.4 m
2 ft. 610 mm 17 ft. 5.2 m
2-1/2 ft. 762 mm 20 ft. 6.1 m
V1+ H1 + H2= 40 ft. (12.2 m) Maximum
H1 + H2= 20 ft. (6.1 m) Maximum
V1= 1 ft. (305 mm) Minimum
CD4842-MOD
V1Minimum H1+ H2Maximum
Elbow only Not allowed
6 in. 152 mm Not allowed
1 ft. 305 mm 2 ft. 610 mm
2 ft. 610 mm 4 ft. 1.2 m
3 ft. 914 mm 6 ft. 1.8 m
4 ft. 1.2 m 8 ft. 2.4 m
6 ft. 1.8 m 12 ft. 3.6 m
10 ft. 3.0 20 ft. 6.1 m
V1+ H1 + H2= 40 ft. (12.2 m) Maximum
H1 + H2= 20 ft. (6.0 m) Maximum
V1= 1 ft. (305 mm) Minimum
INSTALLED
HORIZONTALLY
H
1
H
2
V
1

Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/1520
Top Vent - Vertical Termination
FLUE
RESTRICTOR
No Elbow
Figure 4.9
Note: If installing a vertical vent/
termination off the top of the appli-
ance, the flue restrictor should be
used. See Figure 4.13.
V
1
V1= 40 ft. Max. (12.4 m)
V1= 3 ft. Min. (914 mm)
Figure 4.11 Flue Restrictor
2. Break the flue restrictor into two pieces. Do this by
bending the part back and forth until it breaks (see
Figure 4.11).
Figure 4.10
BREAK
HERE
Flue Restrictor Instructions
1. Install flue restrictor as shown below.