Desa DNV40PB, DNV25PB User Manual

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DYNAVENT
WINDOW WALL FURNACE
DIRECT-VENT PROPANE/LP GAS HEATER
DNV25PB DNV40PB
50 60 70 80 90
SOLID STATE IGNITION
50 60 70 80 90
25,000 and 40,000 BTU/Hr “B” Model Furnaces
WARNING: If the information in these instructions 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 manual for correct installation and operational proce­dures. For assistance or additional information 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 may be installed in an aftermarket*, permanently located, manufac­tured (mobile) home, where not prohibited by local codes.
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.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
Save this manual for future reference.
®
DYNAVENT
DIRECT-VENT PROPANE/LP GAS HEATER
SAFETY INFORMATION
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this furnace. Improper use of this furnace can cause seri­ous injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the flu, with headaches, dizziness, and/or nau­sea. If you have these signs, the furnace may not be working properly. Get fresh air at once! Have furnace serviced. 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: Propane/LP gas is odor-
less. An odor-making agent is added to pro­pane/LP gas. The odor helps you detect a propane/LP gas leak. However, the odor added to propane/LP gas can fade. Propane/LP 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 furnace.
WARNING: Any change to this heater or its controls can be dangerous.
Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
Do not place clothing or other flammable material on or near the appliance. Never place any objects on the furnace.
Carefully supervise young chil­dren when they are in the same room with furnace.
Surface of furnace becomes very hot when running furnace. Keep children and adults away from hot surface to avoid burns or clothing ignition. Furnace will remain hot for a time after shutdown. Allow surface to cool before touching.
Turn off furnace and unplug and let cool before servicing. Unless you need gas supply for testing, shut off equipment shutoff valve before servicing. Only a qualified service person should service and repair furnace and venting system.
Replace any safety screen or guard removed for servicing be­fore operating furnace.
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, etc. Turn off the gas valve and unplug before cleaning furnace.
1. A qualified service person must install furnace.
2. 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.
3. Use only propane/LP gas. Do not con­vert furnace to use different fuel type.
4. 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 your gas supplier,
call the fire department.
5. Do not block the flow of combustion air (outside air) or heated air (room air) to the furnace.
6. This furnace must have fresh air for proper operation. If not, poor fuel combustion and improper venting of flue gases will result. Carbon monoxide poisoning from backed­up flue gases could occur. The State of California lists carbon monoxide as a re­productive toxin under Proposition 65.
7. Never install the furnace
• in a recreational vehicle
• in an alcove
• on an inside wall
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
• behind a door or where an open door
would block normal air flow
8. Provide the following minimum fur­nace clearances from furnace front cover to combustibles (as viewed from the front of furnace): Below Front Cover: 6 inches; Adjoining Wall: 12 inches; Above Front Cover: 12 inches; Front: 8 feet
9. 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.
10. Provide the following minimum furnace clearances from furnace cabinet (portion of cabinet extending into outside air, as viewed from the rear of furnace): Cabinet Back: 36 inches Cabinet Sides: 6 inches Cabinet Bottom: Must be high enough off the ground to prevent snow, water, leaves, or any other objects from block­ing cabinet vents.
11. Always follow lighting instructions. Never attempt to light burner with a match or butane torch.
12. Do not run furnace
• where flammable liquids or vapors
are used or stored
• under dusty conditions
15. Do not use furnace as a cooking device.
16. Do not alter furnace or its controls. Any change may create a safety hazard.
19. Do not use furnace if any part has been under water. Immediately call a quali­fied service person to inspect the fur­nace and to replace any part of the con­trol system and any gas control which has been under water.
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201839
OWNER’S MANUAL
LOCAL CODES UNPACKING
Install and use furnace with care. Follow all local codes. In the absence of local codes, use the latest edition of the following:
National Fuel Gas Code ANS Z223.1, also known as NFPA 54 * (USA)
• National Electric Code ANS/NFPA 70*
CAN/CGA-B149[.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
**Available from:
Standards Council of Canada
350 Sparks Street
Ottawa, Ontario K1R 7S8
This furnace must be grounded when in­stalled. Follow all local codes. In the ab­sence of local codes, refer to the National Electrical Code ANS/NFPA No. 70 (U.S.A.) or CSA C22.1 Canadian Electrical Code, Part I (Canada).
The installation must conform with local codes, in the absence of local codes, with the
National Fuel Gas Code, ANS Z223.1/Ca­nadian Installation Code, CAN/CGA B149.
When installing furnace in a manufactured (mobile) home, follow the Manufactured
Home Construction and Safety Standard, Title 24CFR, Part 3280 (formerly the Fed­eral Standard for Mobile Home Construc­tion and Safety, Title 24, part 280; 1975).
When such a standard is not applicable, follow the Standard for Manufactured Home
Installations, 1982 (Manufactured Home Sites, Communities, and Set-Ups), ANS A225.1/NFPA 501A.
In Canada, install furnace in accordance with
Standard CSA Z240.4 - Gas Equipped Recre­ational Vehicles and Mobile Housing and
any applicable local codes and regulations. Appliance input ratings are based on sea
level operation and need not be changed for operation up to 2,000 feet elevation. For operation at elevations above 2,000 feet, manufactured to specified deration condi­tions for Canada and the United States.
1. Remove furnace from carton.
2. Remove all protective packaging ap­plied to furnace for shipment.
3. Remove the following items from carton:
• Hardware package containing four
large screws, two small screws, and thermostat mounting plate
• Hardware package (thermostat and
two screws)
• Equipment shutoff valve If any of these items are missing,
promptly inform dealer where you bought furnace.
4. Check furnace for any shipping damage. If furnace is damaged, promptly inform dealer where you bought furnace.
SPECIFICATIONS
*Rated Heating Input (BTU/Hr) 25,000 40,000 Thermal Output Capacity
(average loss calculation) 18,750 Btu/Hr 30,000 Btu/Hr Type Gas Propane/LP Only Propane/LP Only Ignition Hot Surface Ignitor Hot Surface Ignitor Operating Amps 1.5 2 Volts/Cycles 120/60 120/60 Main Burner 1 2 Pressure Regulator Setting 10" W.C. 10" W.C. Inlet Connection 3/8 NPT 3/8 NPT Inlet Gas Pressure (in. of water)*
Maximum 13" 13"
Minimum 11" 11" Dimensions, Inches (H x W x D)
Furnace 15 3/32 x 16 1/8 x 23 5/8 15 3/32 x 21 3/4 x 23 5/8 Weight (pounds)
Furnace 53 71
Shipping 65 98 * For purposes of input adjustment.
PRODUCT FEATURES
HOT SURFACE IGNITOR
This furnace has an electronic ignitor. There is no standing pilot. No matches or batteries are required.
THERMOSTATIC HEAT CONTROL
The thermostat is temperature sensitive. It automatically turns the furnace on and off. This results in the greatest heating comfort. This can also result in lower gas bills.
LIMIT SWITCH
The limit switch shuts off the gas to the main burner if the furnace becomes too hot to operate safely.
DNV25PB DNV40PB
201839
3
®
6" Minimum
Adjacent
Side Wall
Ceiling
Finished Floor, Carpet, Tile, etc.
12"
Minimum
12" Minimum
DYNAVENT
DIRECT-VENT PROPANE/LP GAS HEATER
INSTALLATION
Mounting hardware needed to mount fur­nace into wall is included with the furnace. No venting material is needed. You must furnish tools and all gas piping from the gas source to the furnace inlet.
WARNING: A qualified ser­vice person must install furnace. Have service person inspect fur­nace before use and at least an­nually. Follow all local codes.
NOTICE: This furnace must be electrically grounded. Follow all local codes. In the absence of local codes, follow the
Electric Code, ANS/NFPA 70 (U.S.) or Canadian Electrical Code Part I-CSA C22.1 (Canada).
CHECK GAS TYPE
Use only propane/LP gas. If your gas sup­ply is not propane/LP gas, do not install furnace. Call dealer where you bought fur­nace for proper type furnace.
INSTALLATION ITEMS
Before installing furnace, make sure you have all items below:
• electric drill
• drill bits
• Phillips screwdriver
• hammer
• pipe wrench
• stud locator or small finishing nails
• equipment shutoff valve (supplied)
• test gauge connection (see Figure 15, page 10)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• ground joint union
• sediment trap
• tee joint
National
LOCATING FURNACE
This furnace is designed to be mounted in a wall that is 4 to 18 inches thick. You can also mount furnace in a window.
WARNING: Do not install fur­nace in interior wall of building. You must install furnace in exterior wall of building. Rear of furnace must extend into open, outside air. This lets poisonous exhaust gases ven­tilate to the outdoors.
WARNING: Turn off electrical circuits that pass through the wall where you are going to install the furnace.
WARNING: Maintain the mini­mum clearances shown in Figure
1. If you can, provide greater clear­ances from floor, ceiling, and joining wall.
WARNING: Due to high tem­peratures, never install the furnace:
• in an inside wall
• in a recreation vehicle
• in a window recessed in a thick
wall (creating an alcove)
• in an alcove
• behind a door or where an open
door would block normal air flow
• as a fireplace insert
• in high traffic areas
• near furniture or draperies
• in windy or drafty areas
CAUTION: If you install the furnace in a home garage, locate furnace where moving vehicle will not hit it.
For convenience and efficiency, install furnace:
• where there is easy access for operation, inspection, and service
• in a central location, near an electrical outlet
• where there is adequate clearance around vents outside
Before installing furnace, inspect the wall, floor, and outside areas. Make sure there are no pipes, wiring, or anything else that would interfere with furnace installation. If you are installing thermostat in a wall, make sure there are no pipes or wiring in the hollow wall above the furnace. The thermostat wires will pass through this wall from the attic.
Minimum Clearances
Provide the following minimum clearances from furnace front cover to combustibles (as viewed from the front of furnace, see Figure 1):
Below Front Cover: 6 inches Above Front Cover: 12 inches Adjoining Wall: 12 inches Front: 8 feet
Figure 1 - Mounting Clearances as Viewed from Front of Furnace
The clearance between the cabinet and the wall it passes through is 0 inches.
Provide the following minimum clearances from furnace cabinet (portion of cabinet extending into outside air, as viewed from the rear of furnace) to obstructions:
Cabinet Back: 36 inches Cabinet Sides: 6 inches Cabinet Bottom: Must be high enough
off the ground to prevent snow, water, leaves, or any other objects from block­ing vents.
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201839
OWNER’S MANUAL
INSTALLATION
(Continued)
CREATING WALL OPENING AND MOUNTING FURNACE
Remove furnace front cover. Remove the two screws at the lower edges of front cover. Lift front cover away.
Installing in Normal Frame Wall
The 25,000 BTU/Hr model is designed to fit between two wall studs set at 16 inch on center. The 40,000 BTU/Hr model will not fit between wall studs. Follow the steps below to install.
1. Turn off electrical circuits that pass through mounting wall. Make sure there are no pipes or electrical wires in area you intend to cut.
2. Use stud locator or small finishing nail to find wall studs. When you locate studs, drive a small finishing nail into each stud. This provides a visual refer­ence for stud locations.
3. 25,000 BTU/Hr Model: Cut an open­ing in wall between the two studs. Make opening 141/4" wide by 135/8" high (see Figure 2). must install furnace horizontally. Do not install furnace vertically.
40,000 BTU/Hr Model: Cut a 20
wide by 14 3/8" high opening in wall (see Figure 2). Start your cut right next to stud you are going to anchor cabinet to. Cut across wall and through the next stud. Stop cut at proper width.
IMPORTANT:
horizontally . Do not install furnace ver­tically .
4. 25,000 BTU/Hr Model: Mark screw locations on wall (see Figure 2). Make sure screws will anchor into studs. Make sure screw locations match screw holes on cabinet flange.
40,000 BTU/Hr Model: Mark screw
locations on wall (see Figure 2). Make sure screws on one side will anchor into studs. Screws on other side will only anchor in wall material. Make sure screw locations match screw holes on
IMPORTANT:
Yo u
5
/16"
Y ou must install furnace
cabinet flange.
5. 25,000 BTU/Hr Model: Use a proper­sized drill bit. Drill holes through wall and into studs at marked locations.
40,000 BTU/Hr Model: Use a proper-
sized drill bit. On wall stud side of opening, drill holes through wall and into studs at marked locations. On other side, drill holes through wall material.
6. Insert furnace into opening. Do this from inside the room. Secure furnace to wall with four large screws provided.
7. On outside of wall, caulk opening be­tween the cabinet and the rough edges of opening.
Approx. Screw Locations
Wall Studs
1
/4"
14
Wall Opening
13
5
/8"
Approx. Screw Locations
25,000 BTU/Hr Model
Wall Studs
Approx. Screw Locations
20 5/16"
Wall Opening
14
3
/8"
40,000 BTU/Hr Model
Figure 2 - Wall Openings and Screw Locations
Installing in Masonry Wall
You can mount both models in a masonry wall. Follow the steps below to install.
1. Cut opening in wall. Make opening 14 1/4" wide by 13 5/8" high for 25,000 BTU/Hr models. Make opening 20 5/16" wide by 14 3/8" high for 40,000 BTU/Hr mod­els.
IMPORTANT:
furnace horizontally . Do not install fur­nace vertically.
You must install
2. Secure furnace to wall with toggle bolts or hook bolts set in mortar.
3. Insert furnace into opening. Do this from inside the room. Secure furnace to wall with toggle bolts or hook bolts.
4. On outside of wall, caulk opening be­tween the cabinet and the rough edges of opening. You can also use mortar to seal opening.
INSTALLING THERMOSTAT
WARNING: Unplug furnace
before installing thermostat.
Mount the thermostat directly on the fur­nace or on a wall in another part of the room. If you have solid or masonry walls, mount the thermostat on the furnace.
Mounting Thermostat to Furnace
1. Unplug furnace.
2. Locate red and white thermostat wires coming out of side of furnace. These wires are labeled “Thermostat.”
3. Cut thermostat wires to desired length.
4. Route thermostat wires through slot/ hole in side of thermostat mounting plate. Then route wires through 5/8" diameter hole in center of plate (see Figure 4, page 6).
5. Connect thermostat wires to the two terminal screws on back of thermostat (see Figure 3). Connect red wire to “R” terminal. Connect white wire to “W” terminal.
White Wire
W
R
Red Wire
Figure 3 - Connecting Thermostat Wires to Thermostat
Continued
201839
5
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DYNAVENT
DIRECT-VENT PROPANE/LP GAS HEATER
INSTALLATION
(Continued)
6. Attach thermostat to thermostat mount­ing plate with screws provided (see Fig­ure 4).
IMPORTANT:
plate position in Figure 4. Correctly position mounting plate for your model furnace.
7. Insert thermostat mounting plate be­tween wall and cabinet flange. Line up top notch on mounting plate with top screw on flange (see Figure 5).
IMPORTANT:
BTU/Hr model mounts on right side of furnace (see Figure 5). Thermostat for 40,000 BTU/Hr model mounts on left side of furnace (see Figure 5).
8. Insert screw in cabinet flange and ther­mostat mounting plate and tighten firmly .
IMPORT ANT :
wires do not touch combustion chamber.
.2
.3
.4
OFF
.5
.7
50 60 70 80 90
SOLID STATE IGNITION
50 60 70 80 90
50 60 70 80 90
SOLID STATE IGNITION
50 60 70 80 90
Figure 4 - Attaching Thermostat to Thermostat Mounting Plate
1.0
40,000 BTU/Hr Models
OFF
25,000 BTU/Hr Models
Note mounting
Thermostat for 25,000
Make sure thermostat
.2
.3
.4
.5 .7
1.0
00 0
0 00
00
00
00000000000 00000000
00 00 00 00 00
40,000 BTU/Hr Models
50 60 70 80 90
S O
L ID
S T
A T E
IG
N IT IO
50 60 70 80 90
N
25,000 BTU/Hr Models
Figure 5 - Inserting Thermostat Mounting Plate Between Wall and Cabinet Flange
Locating Thermostat on Wall
1. Locate thermostat 4 1/2 to 5 feet above the floor on an inside wall away from any heat sources. The thermostat needs to sense average room temperature. Avoid the following:
HOT SPOTS
Concealed pipes or ducts Fireplaces Registers TV sets and radios Lamps or direct sunlight Kitchen
COLD SPOTS
Concealed pipes or ducts Stairwells (drafts) or doors (drafts) Unheated rooms on other side of wall
DEAD SPOTS
Behind doors Corners and alcoves
2. Before installing thermostat, inspect the wall, floor, and attic areas. Make sure there are no pipes, wiring, or anything else that would interfere with install­ing thermostat. Do not mount thermo­stat to stud. If there are any obstruc­tions, choose a new location.
3. Provide two 18-gauge insulated stranded wires for the thermostat wire. Also pro­vide two wire nuts, and two wall anchors. There is a red and a white thermostat wire coming from the furnace. The extra ther­mostat wires you furnish attach to these wires. Make sure you furnish a red and a white wire. This will insure correct hookup. Purchase enough thermostat wire to go from the furnace to the thermostat location. Do not cut and splice this wire. The thermostat wire must be unbroken.
Routing Thermostat Cable
All wiring must meet local codes. The fol­lowing instructions cover routing the wire through the attic. You can run wiring from a basement or crawl space.
1. Unplug furnace.
2. Before drilling hole in wall, drive a small finishing nail through ceiling directly above thermostat location. Pull nail out and push a small stiff wire through hole. This helps you locate thermostat mount­ing location when in attic.
3. In attic, locate stiff wire. Drill 1/2" hole in center of ceiling wall plate next to stiff wire. Remove wire.
4. Probe through drilled hole in wall plate with a stiff wire to make sure there are no pipes, wiring, or anything else blocking the way for thermostat wires. If you find blockage, choose new loca­tion for thermostat.
5. Drill a 1/2" hole through the wall at thermostat mounting location.
6. From attic, feed thermostat wires through hole in ceiling plate until wires reach thermostat location.
7. Make a small hook with a piece of stiff wire. Run wire hook through 1/2" hole in wall. Hook thermostat wires. Pull wires through hole in wall. Make sure 6" of wires stick out.
8. Drive a small finishing nail in ceiling above furnace.
25,000 BTU/Hr Model - Drive nail
above right side of furnace.
40,000 BTU/Hr Model - Drive nail
above left side of furnace. Pull nail out and push a small stiff wire through hole. This helps you locate wire routing location when in attic.
9. Repeat steps 3 and 4 above.
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201839
OWNER’S MANUAL
INSTALLATION
(Continued)
10. Feed thermostat wires from attic to furnace through 1/2" hole in ceiling wall plate.
11. Connect thermostat wires from attic to thermostat wires on furnace. Connect red wires together, then connect white wires together. Use wire nuts to make connections. thermostat wires do not touch combus­tion chamber.
Mounting the Thermostat to Wall
1. Connect thermostat wires to the two terminal screws on back of thermostat (see Figure 6). Connect red wire to “R” terminal. Connect white wire to “W” terminal.
2. Push any excess wire back through hole in wall and plug hole with insulation to prevent drafts. Drafts affect the ther­mostat operation.
3. Use thermostat base to mark mounting screw locations.
4. Drill proper-sized holes for wall anchors.
5. Attach thermostat to wall using screws provided (see Figure 7).
White Wire
IMPORTANT:
W
Make sure
Wall Anchors
.2
.3
.4
OFF
.5 .7
1.0
50 60 70 80 90
SOLID STATE IGNITION
50 60 70 80 90
Figure 7 - Mounting Thermostat to Wall
CONNECTING TO GAS SUPPLY
WARNING: A qualified ser­vice person must connect fur­nace to gas supply. Follow all local codes.
WARNING: Unplug furnace before connecting to gas supply.
CAUTION: Use only new, black iron or steel pipe. Copper tubing may be acceptable in cer­tain areas. Check local codes. Use pipe large enough in diam­eter to allow proper gas volume to furnace. If pipe is too small, undue loss of pressure will oc­cur. Refer to chart on page 9.
All piping must comply with local codes and ordinances or with the National Fuel Gas Code (ANS Z223.1 NFPA No. 54), whichever applies.
You can connect furnace to gas supply at front of furnace (inside) or at rear of furnace (outside).
Connecting Furnace to Gas Supply at Front of Furnace
1. Locate gas inlet pipe on lower, right front of furnace (see Figure 8).
2. Connect 3/8" NPT pipe or nipple to gas inlet pipe (see Figure 8). See Provid- ing Gas Piping to Furnace, pages 9 and 10, for correct gas pipe installation.
3/8" NPT Pipe or Nipple
Figure 8 - Connecting Gas from Inside of Room
Gas Inlet Pipe
R
Red Wire
Figure 6 - Connecting Thermostat Wires to Thermostat
201839
CAUTION: Lightly apply pipe joint sealant to male threads be­fore connecting. Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Continued
7
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DYNAVENT
DIRECT-VENT PROPANE/LP GAS HEATER
INSTALLATION
(Continued)
Connecting Furnace to Gas Supply at Rear of Furnace
1. Remove the two screws in back of fur­nace cabinet located by the exhaust vent(s) (see Figures 9 and 10).
2. Remove two screws on front lower flange that attach furnace flange to fur­nace cabinet flange (see Figure 11).
Note:
40,000 BTU/Hr model has a bot­tom shield (see parts list, page 22, for location). Removing two screws will detach bottom shield.
3. Slide furnace out of furnace cabinet.
4. Locate gas inlet pipe on lower, right front of furnace.
5. 40,000 BTU/Hr Model Only: Remove screw holding gas inlet pipe clamp to furnace.
6. Disconnect gas inlet pipe from 3/8" manifold elbow. Turn gas inlet pipe counter-clockwise to disconnect (see Figure 12).
7. Rotate the 3/8" manifold elbow 90° so the opening is pointing downward (see Figure 12).
8. Locate knockout plug in furnace cabi­net. Knockout plug is in lower left rear of furnace cabinet (as viewed from rear, see Figure 13). Remove knockout plug.
9. Slide furnace back into furnace cabi­net. Make sure exhaust tube gaskets are in place. Make sure exhaust and intake vent tubes extend into vent caps on back of cabinet. Replace two screws by exhaust vent(s) removed in step 1.
10. 25,000 BTU/Hr Model: Replace two screws removed in step 2. Attach fur­nace flange and furnace cabinet lower flange together.
40,000 BTU/Hr Model: Place bottom
shield back in place. Replace two screws removed in step 2. Attach bot­tom shield, furnace flange, and furnace cabinet lower flange together.
11. Run 3/8" pipe or nipple through knock­out hole. Connect 3/8" pipe or nipple to manifold elbow (see Figure 14). See
Providing Gas Piping to Furnace,
pages 9 and 10 for correct gas pipe in­stallation.
12. Check connections for gas leak.
WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.
13. Caulk around pipe or nipple. This pre­vents cold air entering knockout hole.
Figure 9 - Locations of Screws in Back of Furnace Cabinet (25,000 BTU/Hr Model)
Figure 10 - Locations of Screws in Back of Furnace Cabinet (40,000 BTU/Hr Model)
Furnace
Furnace Cabinet Flange
Figure 11 - Removing Screws on Lower Flange (40,000 BTU/Hr Model Shown)
Flange
Remove Screw, 40,000 BTU/Hr Model Only
Gas Inlet Pipe
Manifold Elbow
Figure 12 - Disconnecting Gas Inlet Pipe (40,000 BTU/Hr Model Shown)
Knockout Plug
Figure 13 - Location of Knockout Plug
3/8" NPT
Figure 14 - Inserting Pipe through Knockout Hole
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201839
OWNER’S MANUAL
INSTALLATION
(Continued)
Providing Gas Piping to Furnace
You must provide gas piping from gas source to furnace. The gas piping must be in a vertical position where it connects to the furnace. This prevents interference with front cover installation.
Consult your local gas company for proper routing of the gas lines. Pipe size is determined by the length of pipe from the gas source to the furnace and the total
BTU load on the gas source. Add the total BTUs required for all appliances connected to the gas source including this furnace.
Divide this number by 2500. This will give you the approximate cubic feet per hour needed.
Example:
40,000 BTU/Hr
+ 15,000 BTU/Hr for other gas appliances
55,000 BTU/Hr total 55,000 ÷ 2500 = 22 Locate 22 or higher on chart below. According to the chart below, you should use 40 feet or less of 3/8" pipe, 125 feet
or less of 1/2" pipe, etc...
MINIMUM
IRON PIPE
SIZE LENGTH OF PIPE (FEET)
10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/8" 47 32 26 22 19 18 16 15 14 13 12 11 10 1/2" 87 61 48 42 37 33 30 28 26 25 22 20 18 17 3/4" 184 126 100 86 76 69 63 59 55 52 48 42 39 36
1" 344 232 189 162 142 129 119 112 106 99 86 79 73 66
1
/4" 696 484 391 331 291 265 245 232 212 202 182 166 149 139
1 11/2" 1060 729 590 504 444 404 371 351 324 305 272 252 232 212
2" 2022 1392 1094 961 842 762 696 656 616 576 517 470 430 404
21/2" 3182 2188 1790 1524 1326 1226 1127 1060 994 928 829 749 969 649
3" 5635 3911 3116 2718 2387 2154 1989 1856 1724 1657 1458 1326 1226 1127 4" 11602 7956 6431 5503 4906 4508 4110 3845 3580 3381 2983 2718 2519 2320
IMPORTANT:
Check gas line pressure at gas meter before connecting furnace to gas line. Gas line pressure must be no less than 11 inches of water and no greater than 13 inches of water. Gas pressures and input to the burners must not exceed the rated input and pressure shown on the rating plate. For propane/LP gas, manifold pressure should be 10 inches of water. For elevations above 2000 feet, reduce rating 4% for each 1000 feet above sea level (U.S.A. only).
CAUTION: Never connect heater directly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and propane/LP supply.
The installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install external regulator with the vent pointing down. Pointing the vent down protects it from freezing rain or sleet.
201839
9
Continued
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