CAST IRON STOVE AND DIRECT-VENT (FREESTANDING FIREPLACE HEATER)
BURNER SYSTEM
OWNER’S OPERATION AND INSTALLATION MANUAL
NATURAL GAS BURNER SYSTEM MODEL CDVBN(A), PROPANE/LP GAS BURNER SYSTEM MODEL CDVBP(A) REMOTE READY
IMPORTANT: This direct-vent burner system must be installed into approved Comfort Glow cast iron stove bodies, models CISGA series and CISCA series ONLY. See page 3 of this manual.
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch
•Do not use any phone in your building.
•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manualforcorrectinstallationand operational procedures. For assistanceoradditionalinformation consult a qualified installer, service agency, or the gas supplier.
— Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
— This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases, unless a certified kit is used.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.
Save this manual for future reference.
CDVBN(A) AND CDVBP(A)
CAST IRON STOVE AND BURNER SYSTEM
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this stove and burner system. Improper use of this stove and burner system can cause serious injury or death from burns, fire, explosions, electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide poisoning may lead to death!
This stove with burner system is a vented product. This stove with burner system will not produce any gas leakage into your home if properly installed. This stove with burner system must be properly installed by a qualified service person. The glass door must be properly seated and sealed. If this unit is not properly installed by a qualified service person with glass door properly seated and sealed, gas leakage can occur.
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the stove with burner system may not have been installed properly. Get fresh air at once! Have stove with burner system inspected and serviced by a qualified service person. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.
Propane/LP gas and natural gas are both odorless. An odor-making agent is added to each of these gases. The odor helps you detect a gas leak. However, the odor added to these gases can fade. Gas may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this stove and burner system.
WARNING: Any change to this stove or burner system or its controls can be dangerous.
1.This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases unless a certified kit is used.
2.For propane/LP burner system, do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.
3.If you smell gas
•shut off gas supply
•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 you gas supplier, call the fire department.
4.Never install the stove
•in a recreational vehicle
•where curtains, furniture, clothing, or other flammable objects are less than 42" from the front, top, or sides of the stove
•in high traffic areas
•in windy or drafty areas
5.This stove reaches high temperatures. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Stove will remain hot for a time after shutdown. Allow surfaces to cool before touching.
6.Carefully supervise young children when they are in the room with stove.
7.Do not modify the burner or stove under any circumstances.Any parts removed for servicing must be replaced prior to operating stove or burner system.
8.Turn burner system off and let cool before servicing, installing, or repairing. Only a qualified service person should install, service, or repair the stove or burner system. Have burner system inspected annually by a qualified service person.
9.You must keep control compartments, burners, and circulating air passages clean. More frequent cleaning may be needed due to excessive lint and dust from carpeting, bedding material, pet hair, etc. Turn off the gas valve and pilot light before cleaning stove or burner system.
10.Have venting system inspected annually by a qualified service person. If needed, have venting system cleaned or repaired. See Cleaning and Maintenance, page 26.
11.Keep the area around your stove clear of combustible materials, gasoline, and other flammable vapor and liquids. Do not run burner system where these are used or stored. Do not place items such as clothing or decorations on or around stove.
12.Do not use this stove to cook food or burn paper or other objects.
13.Never place anything on top of stove.
14.Do not use any solid fuels (wood, coal, paper, cardboard, etc.) in this stove. Use only the gas type indicated on burner system nameplate.
15.This appliance, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANS/NFPA 70, or the Canadian Electrical Code, CSA C22.1.
16.Do not obstruct the flow of combustion and ventilation air in any way. Provide adequate clearances around air openings into the combustion chamber along with adequate accessibility clearance for servicing and proper operation.
17.Do not install stove directly on carpeting, vinyl tile, or any combustible material other than wood. The stove must set on a metal or wood panel extending the full width and depth of the stove.
18.Do not use stove or burner system if any part has been exposed to or under water. Immediately call a qualified service person to arrange for replacement of the unit.
19.Do not operate burner system if any log is broken.
20.Do not use a blower insert, heat exchanger insert, or other accessory not approved for use with this stove.
21 . Do not operate burner system with glass door removed, cracked, or broken.
2 |
105501 |
OWNER’S MANUAL
PRODUCT IDENTIFICATION
Cast Iron
Stove Body
Log Set
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HI |
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OFF |
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AUTO |
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ON/OFF |
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Piezo Ignitor |
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Control Valve
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Cast Iron |
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Stove Body |
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Vent |
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Opening |
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Burner |
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Installation) |
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Glowing Embers
Grate Assembly
Figure 1 - Comfort Glow Direct-Vent Burner System Shown Installed in Approved Comfort Glow Cast Iron Stove Body Models CISGA Series and CISCA Series Only
LOCAL CODES
Install and use stove and burner system with care. Follow all local codes. In the absence to local codes, use the current National Fuel Gas Code ANS Z223.1, also known as NFPA 54* (USA) or the current CAN/CGAB149[.1 or .2] Installation Codes (Canada).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
PRODUCT
FEATURES
OPERATION
This cast iron stove with burner system is clean burning and vents easily through outside walls or vertically using outside air for combustion. Heat is generated by both realistic flames and glowing embers. When used without the blower accessory, the stove with burner system requires no electricity making it ideal for emergency backup heat.
PIEZO IGNITOR
This burner system has a piezo ignitor. This system requires no matches, batteries, or other sources to light burner system.
GLOSSARY OF
TERMS
Chase - A boxlike enclosure to protect venting from the elements when the venting run is on the outside of a structure.
Mastic - A pliable sealant for use around the vent terminal.
Snorkel Termination - A box that raises the horizontal termination above ground level clearances.
Vent Terminal - Mounted on an outside wall or roof to separate the inlet and outlet of the vent system and protect it from weather.
Vinyl Siding Standoff - A metal box that separates the vent cap from vinyl siding.
Wall Thimble/Firestop - A metal plate used to secure the vent pipe when it passes through a wall or ceiling.
105501 |
3 |
CDVBN(A) AND CDVBP(A)
CAST IRON STOVE AND BURNER SYSTEM
PRE-INSTALLATION PREPARATION
WARNING: A qualified service person must install stove and burner system. Follow all local codes.
CAUTION: This stove creates warm air currents. These currents move heat to wall surfaces next to stove. Installing stove next to vinyl or cloth wall coverings or operating stove where impurities (such as tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls.
LOCATION AND SPACE REQUIREMENTS
Determine the safest and most efficient location for your Comfort Glow cast iron stove. Make sure that rafters and wall studs are not in the way of the venting system. Choose a location where the heat output is not affected by drafts, air conditioning ducts, windows, or doors. Figure 2 shows some common locations. Read all venting information in this manual. Be aware of all restrictions and precautions before deciding the exact location for your stove.
When deciding the location of your stove, follow these rules:
1.Do not connect this stove and burner system to a chimney flue serving a separate solid-fuel burning fireplace or appliance.
2.Due to high temperatures, do not locate this stove in high traffic areas or near furniture or draperies.
3.Proper clearances must be maintained, see Figure 3 and Figure 4 on page 5.
4.This stove is a freestanding unit designed to set directly on the floor. If your stove is to be installed directly on carpeting, vinyl tile, or any combustible material other than wood, it must be installed on a metal or wood panel extending the full width and depth of the stove. See Figure 5, page 5.
On Wall with
Horizontal Termination
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Figure 2 - Common Stove Locations |
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36" |
4" |
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Front |
Back |
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Wall |
29"
Floor
4"
6"
Front
Figure 3 - Clearances for Standard Installation
4 |
105501 |
OWNER’S MANUAL
PRE-INSTALLATION PREPARATION
Continued
4" |
4" |
Figure 4 - Clearance for Corner Installation
25"
Front
25 5/8"
Figure 5 - Stove with Burner System Bottom Dimensions
CAST IRON STOVE AND DIRECT-VENT BURNER SYSTEM ASSEMBLY
STOVE BODY ASSEMBLY
1.Lift off corrugated box enclosing stove body crating.
2.Remove all screws fastening the wood frame enclosure. Spread wood frame open and lift away from plastic-bagged stove body. The bottom pieces of pallet wood will remain bolted to the stove body.
3.Remove plastic bag from stove body.
4.Remove back panel from stove (see Figure 6). Use an adjustable wrench or a 10 mm socket. Remove six (6) bolts and washers. Keep bolts and washers to reattach back panel later.
5.Remove all contents from inside stove cavity. Contents include:
(1) - Stove bottom
(4) - Legs with leg leveler bolts
(1) - Bottom door
(1) - Top grate
(1) - Hardware kit bag with fasteners
Bolt |
Product |
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Back |
Identification |
Label |
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Stove |
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Panel |
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6. Carefully lay stove body on back to attach bottom components to stove body (see Figure 7). Rest stove on drop cloth or blanket to avoid scratching stove edges.
7. Remove remaining pallet wood attached to bottom of stove body (see Figure 8). Use an adjustable wrench to remove bolts.
Bolt Front
Pallet Wood
Figure 8 - Removing Pallet Wood from the Bottom of the Stove
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Door Catch Bolt |
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Door Hinge Step |
With Adjustable |
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Bolt Hole |
Hex Nuts Hole |
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Front |
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Hole |
Hole |
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Stove 
Bottom
Hole
Leg Hole 
Bottom Of
Stove Unit
Figure 9 - Locating Threaded Holes for Stove Bottom, Legs, and Door Attachment
Figure 6 - Removing Back Panel |
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Top of Stove Unit |
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Front of |
Front of |
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Stove Unit |
Top of |
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Stove |
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Stove |
Unit |
Pallet |
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Drop |
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Wood |
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Cloth/ |
Bolted to |
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Blanket |
Bottom of |
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Stove |
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Body |
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Figure 7 - Laying Stove On Side |
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Continued |
105501 |
5 |
CDVBN(A) AND CDVBP(A)
CAST IRON STOVE AND BURNER SYSTEM
CAST IRON STOVE AND DIRECT-VENT BURNER SYSTEM ASSEMBLY
Continued
8.Fasten each leg to stove with four (4) M8 x 1.25 - 20mm bolts. Use a flat washer and lock washer with each bolt. Tighten bolts into threaded holes on stove body (see Figure 9, page 5 and Figure 10). Use an adjustable wrench or a 12mm socket.
9.Fasten stove bottom to stove with four
(4) M6 x 1 - 25mm bolts. Use a flat washer and lock washer with each bolt. Tighten bolts into threaded holes on stove body (see Figure 9, page 5 and Figure 10). Use an adjustable wrench or a 10mm socket.
Bolt
Bottom Of
Stove Unit
Leg
Figure 10 - Attaching Stove Legs
Washers
Bolt |
Bottom Of |
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Stove Bottom Stove Unit |
Figure 11 - Attaching Stove Bottom
10.Attach stove door by inserting step bolt through door hinge pivot hole and into threaded hole in stove body (see Figure 9, page 5 and Figure 10). Use an adjustable wrench or a 12mm socket to fasten step bolt. Tighten step bolt until snug. Make sure door moves freely.
11.Install door catch bolt (M8 x 1.2555mm with two M8 hex nuts) into threaded hole on stove body (see Figure 9, page 5). Use an adjustable wrench or a 12mm socket. The catch bolt has two hex nuts attached to it (see Figure 13). The top nut is a bolt stop and the bottom nut is for door leveling adjustment.
12.Check general catch bolt alignment with door claw. Make final adjustment and door leveling after stove is in normal standing position.
13.Carefully lift stove back up on its four attached legs.
Door Claw |
Door |
Bolt Stop
Adjusting Nut
Catch Bolt
Figure 13 - Catch Bolt and Door Claw
Orientation
INSTALLING DIRECT-VENT BURNER SYSTEM INTO STOVE BODY
1.Carefully lift burner system and place into stove body from the rear of stove.
2.Using screws provided, attach burner system to back of stove.
14. Set top grate into stove top.
Stove
Door
Threaded
Hole
Door
Hinge
Step
Bolt
Bolt
Shoulder
Stove Bottom
Screw
Burner
System
Cast Iron
Stove Body
P
Figure 14 - Installing Burner System Into
Cast Iron Stove Body
Figure 12 - Attaching Stove Door
6 |
105501 |
OWNER’S MANUAL
CAST IRON STOVE AND DIRECT-VENT BURNER SYSTEM ASSEMBLY
Continued
INSTALLING OPTIONAL BLOWER ACCESSORY
NOTICE: If installing blower in an existing stove with burner system with gas connections, shut off gas supply and disconnect burner system from gas supply. Contact a qualified service person to do this.
Attaching Thermal Switch to CDA3620T ThermostaticallyControlled Blower
When installing the CDA3620T thermostati- cally-controlled blower accessory, you must first secure the thermal switch to the blower.
1.Remove the two hex head screws on the blower assembly as shown in Figure 15.
2.Place the green wire between the bottom hole on the thermal switch bracket and the bottom hole on the blower assembly. Insert one of the hex screws into all three pieces and tighten.
3.Insert the top screw through the thermal switch bracket and into the blower assembly. Tighten screw.
4.Connect the blue wire on the blower assembly to the right side of the thermal switch.
5.Connect the black wire to the left side of the thermal switch.
Black |
White Wire |
Blower |
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Wire |
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Assembly |
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Thermal |
Green |
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Switch |
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Wire |
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with |
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Blue Wire |
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Bracket |
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Hex Head |
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Screws |
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Figure 15 - Attaching Thermal Switch to CDA3620T Thermostatically-Controlled Blower Accessory
Installing GA3750/CDA3620T
Blowers
1.Align the holes in the top mounting tabs of blower with holes in wall of rear cover (see Figure 16). Using the 4 screws provided, mount blower and tighten screws securely.
Note:For CDA3620T, make sure the thermal switch has been properly installed to fit against the back of the burner system.
2.Make sure all wire connections to terminals on blower motor (and thermal switch where applicable) are securely attached and that the screw retaining the green ground wire is tight.
3.Place speed control on back wall inside of rear cover and push the plastic control shaft through opening (see Figure 16).
4.While supporting speed control, secure control shaft with lock nut by pushing and turning lock nut with pliers clockwise until tight against the side of rear cover. Place control knob provided onto shaft (see Figure 16).
5.Plug in blower power cord.
6.Check to make sure that the power cord is completely clear of the blower wheel and that there are no other foreign objects in blower wheel. Turn blower on and check for operation. Turn blower off by rotating knob fully counterclockwise before continuing.
WARNING: Never touch the blower wheel while in operation.
7.Peel off the backing paper and stick the supplied wiring diagram decal on the inside of rear cover on right side opposite control.
WARNING: Failure to position the parts in accordance with supplied diagrams or failure to use only parts specifically approved with this stove and burner system may result in damage or personal injury.
8.Connect or reconnect gas supply to stove and burner system per Connecting Stove/Burner System to Gas Supply on page 19 of this manual.
WARNING: A qualified service person must connect burner system to gas supply. Follow all local codes.
Blower |
Speed Control |
Control Knob |
Control Shaft |
Lock |
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Nut |
Power Cord |
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Mounting Screws |
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(Included in |
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Hardware Pack) |
Black |
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White Wire |
Wiring |
Wire |
Diagram |
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Decal |
Blue |
Green |
Rear Cover |
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Wire |
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Blower |
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Ground Wire |
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Figure 16 - Installing Optional Blower Accessory (Thermostat Model CDA3610T |
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Shown) |
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Continued |
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105501 |
7 |
CDVBN(A) AND CDVBP(A)
CAST IRON STOVE AND BURNER SYSTEM
CAST IRON STOVE AND DIRECT-VENT BURNER SYSTEM ASSEMBLY
Continued
INSTALLING REAR COVER
1.Lift rear panel over vent pipe connection on burner system. Rear cover will rest on the bottom ledge of the stove body.
2.Using screws provided, attach rear cover to back of stove body. See Figure 17.
IMPORTANT: This rear cover must be securely in place before venting pipes are installed.
Rear
Cover
GENERAL VENTING
These models are approved for use with Simpson Dura-Vent 6 5/8" direct-vent pipe components and terminations as well as both flex and rigid Comfort Glow vent components.
Your stove with burner system is approved to be vented either through the side wall, or vertically using the following guidelines:
•Only use Comfort Glow or Simpson DuraVent GS venting components or kits specifically approved for this stove and burner system.
•Minimum clearance between vent pipes and combustible materials is 1" (25 mm), except where stated otherwise.
Screw
•Do not recess venting terminals into a wall or siding.
•Install horizontal venting with a 1/4" rise for every 12" of run toward the termination.
•You may paint the vent terminal with 450ºF (232ºC) heat-resistant paint to coordinate with the exterior finish.
•There must not be any obstruction such
as bushes, garden sheds, fences, decks, or utility buildings within 24" from the front of the termination cap.
•Do not locate termination cap where excessive snow or ice build up may occur. Be sure to clear vent termination area after snow falls to prevent accidental blockage of venting system. When using snow blowers, do not direct snow towards vent termination area.
•You must maintain minimum wall and ceiling clearances shown in Figures 3 and 4, pages 4 and 5.
LOCATION OF VENT
TERMINATION
When locating vent termination, it is important to observe the minimum clearances shown in Figure 18, page 9.
*Check with local codes or with the current
CAN/CGA B149[.1 or .2] Installation Codes for Canada or the USA Installations follow the current National Fuel Gas Code, ANS Z223.1, also known as NFPA 54.
Firebox
Installed In Cast
Iron Stove Body
Figure 17 - Installing Rear Cover
8 |
105501 |
OWNER’S MANUAL
GENERAL VENTING Continued
D |
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V |
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Openable |
Fixed |
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V TERMINATION CAP |
X AIR SUPPLY INLET |
G GAS METER |
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V K X |
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A |
RESTRICTED AREA 
(TERMINATION PROHIBITED)
A= clearance above grade, veranda, porch, deck, or balcony [*12 inches (305mm) minimum]
B= clearance to window or door that may be opened
[12 inches (305mm) minimum]
C = clearance to permanently closed window [minimum 12 inches (305mm) recommended to prevent condensation on window]
D = vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 24 inches (610mm) from the center-line of the terminal [18 inches (457mm) minimum]
E= clearance to unventilated soffit [12 inches (305mm) minimum]
F= clearance to outside corner (see below)
G= clearance to inside corner (see below)
H= *not to be installed above a meter/regulator assembly within
36 inches (914mm) horizontally from the center-line of the regulator
I= clearance to service regulator vent outlet [*72 inches (1829mm) minimum]
J= clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other fireplace [*12 inches (305mm) minimum]
K= clearance to a mechanical air supply inlet [*72 inches (1829mm) minimum]
L= † clearance above paved side-walk or a paved driveway located on public property [*84 inches (2133mm) minimum]
M= clearance under veranda, porch, deck [*12 inches (305mm) minimum ‡]
N= clearance above a roof shall extend a minimum of 24 inches (610mm) above the highest point when it passes through the roof surface and any other obstruction within a horizontal distance of 18 inches (457mm)
† vent shall not terminate directly above a side-walk or paved driveway which is located between two single family dwellings and serves both dwellings*
‡ only permitted if veranda, porch, deck or balconey is fully open on a minimum of 2 sides beneath the floor*
* as specified in CAN/SGA B149 (.1 or .2) Installation Codes (1991) for Canada or for U.S.A. installation follow the current National Fuel Gas Code, ANS Z223.1
Note: Local codes or regulations may require different clearances
Termination Clearances for Buildings with Combustible and Noncombustible Exteriors
Inside Corner |
Outside Corner |
Recessed Location |
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C |
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A |
A = 6" (152mm) |
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V |
V |
V |
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B = 6" (152mm) |
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Balcony with No Side Wall
G |
V |
G = Combustible 24" (610mm)
Noncombustible 18" (457mm)
Balcony with Perpendicular Side Wall
H
V
J 
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
C = Maximum depth of 48" (1219mm) for recessed location
D = Minimum width for back wall of recessed location - Combustible - 38" (965mm) Noncombustible - 24" (610mm)
E = Clearance from corner in recessed locationCombustible - 6" (152mm) Noncombustible - 2" (51mm)
Figure 18 - Minimum Clearances for Vent Terminations
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CDVBN(A) AND CDVBP(A)
CAST IRON STOVE AND BURNER SYSTEM
VENTING INSTALLATION
WARNING: Read all instructions completely and thoroughly before attempting installation. Failure to do so could result in serious injury, property damage or loss of life. Operation of improperly installed and maintained venting system could result in serious injury, property damage or loss of life.
WARNING: Seal all vent connections. Seal only the outer pipe connectionswithhightemperature silicone(600°F/316°C).Beforejoining elbows and pipes, apply a bead of high temperature silicone sealant(GERTV106/LoctiteRTV81585) to the male end of the elbow or pipe. High temperature silicone must also be used to re-seal any connections after maintenance to venting system.
NOTICE: Failure to follow these instructions will void the warranty.
INSTALLATION
PRECAUTIONS
Consult local building codes before beginning the installation. The installer must make sure to select the proper vent system for installation. Before installing vent kit, the installer must read this stove and burner system manual and vent kit instructions.
Only a qualified service person should install venting system. The installer must follow these safety rules:
•Wear gloves and safety glasses for protection
•Use extreme caution when using ladders or when on roof tops
•Be aware of electrical wiring locations in walls and ceilings
The following actions will void the warranty on your venting system:
•Installation of any damaged venting component
•Unauthorized modification of the venting system
•Installation of any component part not manufactured or approved by DESA International
•Installation other than as instructed by these instructions
WARNING: This stove with burner system and vent assembly must be vented directly to the outside. The venting system must NEVER be attached to a chimney serving a separate solid fuel burning appliance. Each gas appliance must use a separate vent system. Do not use common vent systems.
WARNING: Horizontal sections of this vent system require a minimum clearance of 2" from the top of the pipe and 1" minimum to the sides and bottom. Vertical sections of this system require a minimum of 1" clearance to combustible materials on all sides of the pipe.
INSTALLATION PLANNING
There are two basic types of direct-vent installation:
•Horizontal Termination
•Vertical Termination
It is important to select the proper length of vent pipe for the type of termination you choose. It is also important to note the wall thickness.
For Horizontal Termination: Select the amount of vertical rise desired. The horizontal run of venting must have 1/4" rise for every 12" of run towards the termination.
WARNING: Never run the vent pipe downward as this may cause excessive temperatures which could cause a fire.
You may use one or two 90° elbows in this vent configuration. See Horizontal Termination Configurations on pages 13 and 14.
For Vertical Termination: Measure the distance from the burner system flue outlet to the ceiling. Add the ceiling thickness, the vertical rise in an attic or second story, and allow for sufficient vent height above the
roofline. You may use one or two 90° elbows in this vent configuration. See Vertical Termination Configurations on pages 16 and 17.
Note: You may use two 45° elbows in place of a 90° elbow. You must follow rise to run ratios when using 45° elbows.
For two-story applications, firestops are required at each floor level. If an offset is needed in the attic, additional pipe and elbows will be required (see Figure 31, page 15).
You may use a chase with a vent termination with exposed pipe on the exterior of the house. See Installing Vent System in a Chase, below.
Your Comfort Glow stove with direct-vent burner system has been tested for a maximum 17" wall thickness when using a 60º elbow directly off the back of the stove. The maximum horizontal run is 20' with 8' vertical rise (see Installation for Horizontal Termination, pages 11 and 12). The maximum vertical run is 30' (seeInstallation for Vertical Termination, pages 14 and 15).
It is very important that the venting system maintain its balance between the combustion air intake and the flue gas exhaust. Certain limitations apply to vent configurations and must be strictly followed.
Installing Vent System in a Chase
A chase is a vertical boxlike structure built to enclose venting that runs along the outside of a building. A chase is not required for such venting.
NOTICE: Treatment of firestops and construction of the chase may vary from building type to building type. These instructions are not substitutes for the requirements of local building codes. You must follow all local building codes.
Note: When installing in a chase, you should insulate the chase as you would the outside walls of your home. This is especially important in cold climates. Minimum clearance between vent pipes and combustible materials such as insulation is 1".
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OWNER’S MANUAL
VENTING INSTALLATION
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INSTALLATION FOR HORIZONTAL TERMINATION
1.Determine the route your horizontal venting will take. Note: The location of the horizontal vent termination on the exterior wall must meet all local and national building codes and must not be easily blocked or obstructed.
WARNING: Do not recess vent terminal into a wall or siding.
Snorkel terminations are available for terminations requiring a vertical rise on the exterior of the building (see Figures 19 and 20). Snorkel kit SVKBK is also available (see page 17). Follow the same installation procedures used for standard horizontal terminations. If installing the snorkel termination below grade (basement applications), you must provide proper drainage to prevent water from entering the snorkel termination (see Figure 20). Do not back fill around the snorkel termination.
2.Rigid vent pipes and fittings have special twist-lock connections. Assemble the desired combination of pipe and elbows to the appliance adaptor with pipe seams oriented towards the wall or floor.
Twist-lock Procedure: The female ends of the pipes and fittings have four locking lugs (indentations). These lugs will slide straight into matching slots on the male ends of adjacent pipes and fittings. (All connections must be sealed with high temperature silicone sealant as specified in the second warning statement on page 10.) Push the pipe sections together and twist one section clockwise approximately one-quarter turn until the sections are fully locked. See Figure 21, page 12. Note: Horizontal runs of vent must be supported every three feet. Use wall straps for this purpose.
Snorkel |
12" Minimum |
Figure 19 - Snorkel Termination
Snorkel
12" Minimum
Adequate drainage
Figure 20 - Snorkel Termination with Drainage Pipe
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