COZY CDV155B and User manual

DIRECT VENT
WALL FURNACE
INSTALLATION AND
OPERATING INSTRUCTIONS
P/N 70905
REV.02/2010
RR
INSTALLER: Leavethismanualwith the
appliance.
CONSUMER: Retainthis manualfor
futurereference.
NATURAL GAS CDV155B CDV255B CDV335B
L.P. GAS CDV156B CDV256B CDV336B
MODEL NUMBERS
WARNING: Iftheinformation in thismanualisnot
followedexactly, a fireorexplosionmayresultcausing
propertydamage,personalinjuryor lossoflife.
- Donot store or use gasolineor other flammable
vaporsandliquidsinthe vicinityofthisorany
otherappliance.
- WHATTO DOIFYOUSMELLGAS:


Donottrytolightany appliance.


Donottouchanyelectricalswitch,donotuseany
phoneinyourbuilding.


Immediatelycallyourgassupplierfroma neighbor’s
phone. Followthegassupplier’s instructions.


Ifyoucannotreachyourgassupplier,callthefire
department.
- INSTALLATIONAND SERVICEMUSTBE
PERFORMEDBYAQUALIFIEDINSTALLER,
SERVICEAGENCYORTHEGASSUPPLIER.
CDV15-B
CDV25/
CDV33-B
The coating selected to provide longer life to
the heat exchanger may smoke slightly upon
initial firing. Please provide adequate
ventilation if this occurs.
The appliance may be installed in an aftermarket permanently located, manufactured home (USA only)
or 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, unless a
certified kit is used.
WARNING: Operation of this furnace without the properly installed, furnished vent system and vent
cap could result in Carbon Monoxide (CO) poisoning and possible death. For your safety, this furnace
and the vent system should be inspected at least annually by a qualified service technician.
This unit is for residential use only and is not approved for installation in greenhouses, or environments
involving dusty, wet, corrosive, or explosive conditions. Such conditions will invalidate the warranty and
may create unsafe conditions.
Installation,maintenance, service,trouble shootingandrepairsmustbeperformedbyaqualifiedserviceagency.
Mr./Mrs. Homeowner,DO NOTattempt anyoftheseprocedures yourselfasthiscould exposeyouto property
damage,personalinjury,orlossoflifeandwillinvalidateallwarranties.

INTRODUCTION
THIS IS A GAS-FIRED, DIRECT VENT WALL FURNACE THAT WILL OPERATE SAFELY AND
PROVIDE AN EFFICIENT SOURCE OF HEAT WHEN INSTALLED, OPERATED AND
MAINTAINED AS RECOMMENDED IN THESE INSTALLATION AND OPERATING
INSTRUCTIONS. READ THESE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING,
SERVICING, OR USING THE APPLIANCE. IF YOU DO NOT UNDERSTAND ANY PART OF
THESE INSTRUCTIONS CONSULT LOCAL AUTHORITIES, OTHER QUALIFIED INSTALLERS,
SERVICETECHNICIAN,THEGAS SUPPLIERORTHE MANUFACTURER.
Page 2
SAFETYRULES
1. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, bodily injury, or death.
2. Use in other than a residential application may result in unsatisfactory performance and may void the warranty.
3. This appliance must be installed in accordance with local codes, if any; if not, follow the National Fuel Gas CodeANSI
Z223.1/NFPA54or the National Gas and Propane InstallationCode CSA-B149.1.
4. Do not install this wall furnace in a recreational vehicle or trailer.
5. Do not operate wall furnace unless it is connected to the supplied vent system with vent cap in place.
6. Check the rating label attached to the wall furnace to be sure it is equipped for the type gas you intend to use.
7. Never use a match, candle, flame or other source of ignition to check for gas leaks. Use only soapy water or liquid detergent.
8. Have your wall furnace and vent system inspected at least annually by a qualified service technician.
SPECIFICATIONS AND DIMENSIONS
Your Direct Vent Wall Furnace is shipped complete in one carton. This carton contains the furnace, vent
cap, vent tube, air inlet tube, template with rough-in dimensions, installation and operating instructions, and
the thermostat with thermostat wire (if applicable). NOTE: There will be two cartons if optional vent kit
or blower is purchased.
MODEL INPUT GAS TYPE MAX.WALL MIN.WALL
NO. BTU/HR. WIDTH DEPTH HEIGHT CONN. GAS THICKNESS THICKNESS
CDV155B 15,000 18” 9-3/4” 29-3/4” ½” NAT. 24” 5”
CDV156B 15,000 18” 9-3/4” 29-3/4” ½” L.P. 24” 5”
CDV255B 25,000 34-1/2” 9-3/4” 31-3/4” ½” NAT. 24” 5”
CDV256B 25,000 34-1/2” 9-3/4” 31-3/4” ½” L.P. 24” 5”
CDV335B 33,000 34-1/2” 9-3/4” 31-3/4” ½” NAT. 15” 5”
CDV336B 33,000 34-1/2” 9-3/4” 31-3/4” ½” L.P. 15” 5”
CONTENTS
Introduction……………………………. 2
Specifications and Dimensions…………. 2
Safety Rules……………………………. 2/3
Clearances……………………………… 3/4
Location……………………………….. 5
Installation………………………………. 5 - 8
VentKits.................................................. 5 - 7
GasConnection....................................... 8
BBSK Instructions................................... 12/13
LightingInstructions…………………… 9
PilotAdjustment……………………….. 10
BurnerOrifice…………………………… 10
WiringDiagram………………………… 10
RemovingMainBurner………………… 10
ProperBurnerFlame…………………… 11
ThermostatInstallation………………… 11
InstallingOptionalBlowerKit………… 11
MaintenanceInstructions......................... 19
TroubleShooting………………………. 18
PartsDrawing………………………….. 14//16
Parts List……………………………….. 15 /17
Warranty……………………………….. 21
The State of Massachusetts requires that installation and service of a gas appliance be
performedbyaplumberorgasfitter licensed in the CommonwealthofMassachusetts.

Page 3
9. Before cleaning or servicing, turn off the gas and allow furnace to cool.
10. Do not operate wall furnace without outer casing in place.
11. Due to high temperatures, the wall furnace should be located out of traffic and away from furniture and drapes.
12. Children and adults should be alerted to the hazard of high surface temperature and should be kept away to avoid burns or
clothing ignition.
13. Young children should be carefully supervised when they are in the same room with the wall furnace.
14. Do not place clothing or other flammable material on or near the furnace.
15. Installation and repair should be done by a qualified service technician. The wall furnace should be inspected before use
and at least annually by a professional service technician. More frequent cleaning may be required due to excessive lint
from carpeting, bedding material, etc. It is imperative that control compartments, burner, and circulating air passageways of
the furnace be kept clean.
16. Do not install in a closet, alcove, or small hallway where the furnace could be isolated from the space to be heated by
closing a door.
17. Do not put anything around the furnace or vent cap that will obstruct the flow of combustion and ventilation air.
18. The appliance, when installed, must be electrically grounded in accordance with local codes or, in the absence of local
codes, with the latest edition of National Electrical Code, ANSI/NFPA 70. In Canada, use CSA C22.1 Canadian
Electrical Code.
19. Never operate this furnace without the sight glass in place or with the glass broken or missing.
20. If it is suspected that rising water may enter the furnace, turn off the gas immediately. Do not use this appliance if any part
has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the
control system and any gas control which has been under water.
21. It is necessary to replace damaged gaskets or sealing material within the vent or air intake system. Failure to do so may
result in property damage, personal injury or loss of life.
22. Any safety screen or guard removed for servicing must be replaced prior to operating heater.
23. A gas appliance must not be connected to a chimney flue serving a separate solid-fuel burning appliance.
SAFETY RULES - CONT’D.
CDV15-B CDV25 / CDV33-B ALL VENT CAPS
1. When the wall furnace is installed directly on carpeting, tile or other combustible material other than
wood flooring, the furnace shall be installed on a metal or wood panel extending the full width and
depth of the furnace.
2. RESIDENTIAL GARAGE INSTALLATION: Gas utilization equipment in residential garages shall
be installed so that all burners and burner ignition devices are located not less than 18 inches (46cm)
above the floor. Such equipment shall be located, or protected so it is not subject to damage by a
moving vehicle. Use care in selecting a good location within the garage. DO NOT locate the appliance
where heated air will be directed onto a nearby parked vehicle. Paint may discolor or rubber may
harden and crack. DO NOT allow heated discharge air to blow directly onto open or closed containers
of paint, gasoline or other liquids having flammable vapors.
CLEARANCES
18” Min.
12”
Min. 9”
Min.
12” Min.
FIGURE 3
RIGHTSIDEWALL
LEFTSIDE WALL
FIGURE 2
CEILING
30”
CEILING
FLOOR
4”
1” 0”
LEFTSIDE WALL
RIGHTSIDEWALL
FIGURE 1 FLOOR
1” 1”
24”
1/2”

Page 4
VENT TERMINAL CLEARANCES
VentTerminal Air Supply Inlet Area where terminal is not permitted
REFERENCELETTERTODRAWING CANADIANINSTALLATIONS U.S.INSTALLATIONS
A = Clearance above grade, veranda, 12Inches (30 cm) 12 Inches (30 cm)
porch, deck, or balcony
B = Clearance to window or door that 12 Inches (30 cm) 9 Inches (23 cm)
may be opened
C = Clearance to permanently closed 12Inches (30 cm) 9 Inches (23 cm)
window
D = Vertical clearance to ventilated soffit 18Inches (46 cm) 18 Inches (46 cm)
located above the terminal within a
horizontal distance of 2 Feet (61 cm)
from the center line of the terminal
E = Clearance to unventilated soffit 18Inches (46 cm) 18 Inches (46 cm)
F = Clearance to outside corner 12Inches (30 cm) 12 Inches (30 cm)
G = Clearance to inside corner 12Inches (30 cm) 12 Inches (30 cm)
H = Clearance to each side of center line 3 Feet (91 cm) within a height Clearance in accordance with
extended above meter/regulator 15 Feet (4.5m) above the meter/ local installation codes and the
assembly regulator assembly requirements of the gas supplier
I = Clearance to service regulator 3Feet(91cm) Clearance in accordance with
vent outlet local installation codes and the
requirements of the gas supplier
J = Clearance to nonmechanical air supply 12Inches(30cm) 12Inches(30 cm)
inlet to building or the combustion
air inlet to any other appliance
K = Clearance to a mechanical air supply 6Feet (1.83m) 3 Feet(91 cm) above if within
inlet 10Feet(3m) horizontally
L = Clearance above paved sidewalk or 7 Feet (2.13m) A vent shall not Clearance in accordance with
paved driveway located on public terminate directly above a sidewalk or local installation codes and the
property paved driveway that is located between requirements of the gas supplier
two single family dwellings and
serves both dwellings
M = Clearance under veranda, porch, 12 Inches(30 cm) permitted only if Clearance in accordance with
deck, or balcony veranda, porch, deck, or balcony is local installation codes and the
fully open on a minimum of two sides requirements of the gas supplier
In accordance with the current CSA-B149.1 Natural Gas and Propane Installation Code
In aaccordance with the currentANSI Z223.1 / NFPA54 National Fuel Gas Code
1
2
12

LOCATION
1) The wall furnace must be installed on an outside wall.
2) For most efficient performance, locate furnace as centrally as possible in the area to be heated and where occupants may
move about freely without coming into contact with the grille.
3) If the furnace is installed in a basement, a 12” clearance must be maintained between ground level and the bottom of the
vent cap. Do not install furnace where vent cap will terminate in a window well or any other opening below ground level.
INSTALLATION
Failure to follow these instructions carefully could result in poor performance, property damage, personal
injury or death.
STEP 1. LOCATE VENT OPENING. Locate wall studs and center 9” vent opening a minimum of 22”
for CDV15 or 24-1/8” for CDV25/33 above the floor. To locate furnace at minimum clearance from floor, remove template from
carton and set on floor at location desired. On model CDV15, position template no closer than 1” from either side wall. For
model CDV25/33, position template 1” minimum from a left side wall or 0” from a right side wall. Check outside wall to be sure
there is proper clearances around the vent cap. See Figure 3. Next, mark and cut out the vent openings on both the inside and
outside walls (be sure to keep the holes level). See Figure 5. If a higher location on the wall is desired, raise bottom of template
to desired height, make sure template is level and centered between studs, mark and cut out vent openings.
STEP 2. ROUGH-IN GAS SUPPLY. Install a ½” diameter gas supply line. This line can enter through the
floor, side, or rear wall. For location of gas connection to valve, see Fig. 4. The gas supply line must have an individual manual
shut off valve located outside the cabinet, accessible from the room where the heater is installed. Install a drip leg immediately
ahead of the gas valve and provide a 1/8” N.P.T. plugged tapping, accessible for test gauge connection, immediately upstream of
the gas supply connection. The furnace and the individual shut off valve must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 1/2” psig (3.5kPa). The furnace must be isolated from the
gas supply piping system by closing the individual manual shut off valve during any pressure testing of the gas piping system at
test pressures equal to or less than 1/2” psig (3.5kPa).
STEP 3. INSTALLING FURNACE – 5” TO 9” WALLS.Use only the exhaust tube, air intake
tube, wall thimble extension, and vent terminal provided with furnace. Do not attempt to lengthen the exhaust or air intake tubes,
this could cause an imbalance in the furnace resulting in poor performance and pilot outage, see Figure 6. Extend the telescoping
wall thimble extension (surrounding the wall thimble assembly) to approximately 9 inches. Center the wall thimble assembly in
the 9 inch opening and attach to inside wall using eight (8) screws. The wall thimble extension should extend through the
opening and be adjusted so end of wall thimble extension is even with outside wall. Install furnace flush to wall by sliding
exhaust tube and air intake tube through the wall thimble assembly. Secure the furnace to the wall with screws through each of
the four holes in the mounting brackets located on the back of the furnace. These holes are spaced so as to allow the screws to
enter into studs that are on 16 inch centers. On certain types of wall, anchors (not provided) may be required. Slide the vent
terminal onto the exhaust tube and the air intake tube. Secure vent terminal and vent terminal spacer plate to wall providing a
slight downward slope to the vent tubes. This will prevent water from entering. Anchors (not provided) may be required. Caulk
around vent terminal spacer plate with putty provided. See Figure 7. NOTE: Some framing may be necessary to provide a flat
surface for the vent terminal spacer plate to butt against, so rain cannot enter through cut out.
Page 5

INSTALLING FURNACE – 9 TO 15” WALLS (CDV15/CDV25-B).For 9”
to 15” wall use Vent Kit No. VK1525/9-15-B. Do not attempt to lengthen the exhaust tube, air intake tube, or wall thimble
extension provided with furnace or the VK1525/9-15-B Vent Kit. Disconnect the air intake tube, and the exhaust tube from the
back of the furnace and discard. See Figure 6. Replace with exhaust tube and air intake tube from Kit No. VK1525/9-15-B.
Discard the 5” telescoping wall thimble extension that surrounds the wall thimble assembly. Center the wall thimble assembly in
the 9” opening and attach to inside wall using eight (8) screws. Install furnace flush to wall by sliding exhaust tube and air intake
tube through the wall thimble assembly. Secure the furnace to the wall with screws through each of the four holes in the
mounting brackets located on the back of the furnace. These holes are spaced so as to allow the screws to enter into studs that are
on 16-inch centers. On certain types of wall, anchors (not provided) may be required. From outside the building install the thick
wall thimble extension, Part No. 43835, supplied in Vent Kit No. VK1525/9-15-B by sliding it through the cut out and over the
wall thimble assembly. The wall thimble extension should be even with the outside wall (some trimming may be necessary).
Slide the vent terminal onto the exhaust tube and the air intake tube. Secure vent terminal and vent terminal spacer plate to wall
providing a slight downward slope to the vent tubes. This will prevent water from entering. Anchors (not provided) may be
required. Caulk around the vent terminal spacer plate with putty provided. See Figure 7. NOTE: Some framing may be
necessary to provide a flat surface for the vent terminal spacer plate to butt against, so rain cannot enter through cut out.
INSTALLINGFURNACE– 15”TO24”WALLS (CDV15/CDV25-B).For
15” to 24” wall use only Vent Kit No. VK1525/15-24-B. Do not attempt to lengthen the exhaust tube, air intake tube, or wall
thimble extension provided with furnace. The VK1525/15-24-B Vent Kit has a one inch restrictor in the exhaust tube which is
necessary for proper and safe operation of this furnace. Do not use any other vent kit. Disconnect the air intake tube and the
exhaust tube from the back of the furnace and discard, see Figure 6. Install the exhaust tube and air intake tube from Vent Kit No.
VK1525/15-24-B. Discard the 5” telescoping wall thimble extension that surrounds the wall thimble assembly. Center the wall
thimble assembly in the 9” opening and attach to inside wall using eight (8) screws. Install furnace flush to wall by sliding
exhaust tube and air intake tube through the wall thimble assembly. Secure the furnace to the wall with screws through each of
the four holes in the mounting brackets located on the back of the furnace. These holes are spaced so as to allow the screws to
enter into studs that are on 16-inch centers. On certain types of walls, anchors (not provided) may be required. From outside the
building install the wall thimble extension, Part No. 43730, supplied in Vent Kit No. VK1525/15-24-B by sliding it through the
cut out and over the wall thimble extension. For walls 15” to 19” the wall thimble extension, air intake tube, and the exhaust tube
must be trimmed even with the outside wall. Slide the vent terminal onto the exhaust tube and into the air intake tube. Secure
vent terminal and vent terminal spacer plate to wall providing a slight downward slope to the vent tubes. This will prevent water
from entering. Anchors (not provided) may be required. Caulk around the vent terminal spacer plate with putty provided, see
Figure 7. NOTE: Some framing may be necessary to provide a flat surface for the vent terminal spacer plate to butt against, so
rain cannot enter through the cut out.
Page 6
INSTALLING FURNACE – 9 TO 15” WALLS (CDV33-B).For 9” to 15” wall use Vent
Kit No. VK33/9-15-B. Do not attempt to lengthen the exhaust tube, air intake tube, or wall thimble extension provided with
furnace or the VK33/9-15-B Vent Kit. Disconnect the air intake tube, and the exhaust tube from the back of the furnace and
discard. See Figure 6. Replace with exhaust tube and air intake tube from Kit No. VK33/9-15-B. Discard the 5” telescoping wall
thimble extension that surrounds the wall thimble assembly. Center the wall thimble assembly in the 9” opening and attach to
inside wall using eight (8) screws. Install furnace flush to wall by sliding exhaust tube and air intake tube through the wall
thimble assembly. Secure the furnace to the wall with screws through each of the four holes in the mounting brackets located on
the back of the furnace. These holes are spaced so as to allow the screws to enter into studs that are on 16-inch centers. On
certain types of wall, anchors (not provided) may be required. From outside the building install the thick wall thimble extension,
Part No. 43835, supplied in Vent Kit No. VK33/9-15-B by sliding it through the cut out and over the wall thimble assembly. The
wall thimble extension should be even with the outside wall (some trimming may be necessary). Slide the vent terminal onto the
exhaust tube and the air intake tube. Secure vent terminal and vent terminal spacer plate to wall providing a slight downward
slope to the vent tubes. This will prevent water from entering. Anchors (not provided) may be required. Caulk around the vent
terminal spacer plate with putty provided. See Figure 7. NOTE: Some framing may be necessary to provide a flat surface for the
vent terminal spacer plate to butt against, so rain cannot enter through cut out.

Page 7
18”
CABINET
9” DIA.
OPENING
9”
29-3/4”
22”
8”
1/2” 1/2” FLOOR
GAS VALVE
INLET
SHUT OFF
VALVE
1/8” N.P.T.
PRESSURE TAP
GAS
SUPPLY
1/2” BLACK IRON PIPE
DRIP LEG
FIG. 4 / CDV15-B
34-1/2”
FIG. 4 / CDV25/33-B
1” MINIMUM SIDE WALL TYP.
WALL STUDS 16” O.C.
TEMPLATE
MOUNTING
HOLES
FIG. 5 / CDV25/33-B
EXHAUST
TUBE
AIR
INTAKE TUBE
FIG. 6 / CDV25/33-B
EXHAUST
TUBE
AIR
INTAKE TUBE
FIG. 6 / CDV15-B
1” MINIMUM SIDE WALL TYP.
WALL STUDS
16” O.C.
TEMPLATE
MOUNTING
HOLES
FIG. 5 / CDV15-B
CABINET
9” DIA.
OPENING
13-3/8” 16-5/8” GASVALVE
INLET
13”
24-1/8”
31-3/4”
4” FLOOR SHUT OFF
VALVE 1/8” N.P.T.
PRESSURETAP
GAS SUPPLY
1/2” BLACK
IRON PIPE
DRIP
LEG
Center Line Pipe Elbow

Page 8
GAS CONNECTION
Makegasconnectionbetween manual shut offvalveand furnace valve withapprovedconnectors. Compounds
used on threaded joints of gas piping shall be approved for use with L.P gas. The gas lines must be checked for
leaks by the installer with soapy water or liquid detergent, never an open flame. If connections are not
exposed, a pressure test must be run. Be sure to disconnect the gas supply line from the appliance valve before
pressure testing. The manifold pressure is pre-set at the factory and should be 3.5” w.c. for Natural Gas and
10” w.c. for L.P. Gas. The minimum inlet pressure for Natural Gas is 4.5” w.c. and 11” w.c. for L.P. Gas, “for
purpose of input adjustment”. The maximum inlet pressure should never exceed 7.0” w.c. on Natural Gas or
14” w.c. on L.P. Gas.
FIGURE 7
InsideWall
Wall Stud
OutsideWall
WallThimble
Assembly
WallThimble
Extension
Vent Terminal Spacer Plate
Vent Terminal
FIG. 4-AFOR CDV15, CDV25, and CDV33-B
Toheatergascontrolvalve
Manualcut-offvalve
Gas
Supply
Line
1/8”NPT
PressureTap
DripLeg

LIGHTING INSTRUCTIONS / MILLIVOLT (SELF GENERATING)
MODELS: CDV155B, CDV156B, CDV255B, CDV256B, CDV335B, CDV336B
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
A. This appliance has a pilot which must be lighted by hand.
When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electric switch; do not use any phone in
your building.
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.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by
hand, don’t try to repair it, call a qualified service
technician. Force or attempted repair may result in a fire
or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control which has been under water.
LIGHTING INSTRUCTIONS
6. Wait five (5) minutes to clear out any gas. Then smell
for gas, including near the floor. If you smell gas,
STOP! Follow “B” in the safety information on the
safety label. If you don’t smell gas, go to the next step.
7. Open sight glass cover.
8. Locate red piezo ignitor button inside gas control
compartment. Locate pilot behind sight glass. (Follow
metal pilot tube from gas control).
TO TURN OFF GAS TO APPLIANCE
Gas Control Knob
NOTE: Knob can
not be turned from
“PILOT” to “OFF”
unless knob is
pushed in slightly.
Do not force.
Page 9
Sight Glass
Cover
Pilot
Sight Glass
9. Turn gas control knob counterclockwise to “PILOT”.
10. Push in gas control knob and hold in. Immediately begin a
series of pushing and releasing the red piezo ignitor button,
while observing the pilot through the sight glass. Continue
to spark until pilot is lit. Continue to hold the gas control
knob in for about one (1) minute after the pilot is lit. Release
the gas control knob and it will pop back up. Pilot should
remain lit. If pilot goes out, repeat steps 4 thru 9.
If knob does not pop up when released, STOP and
immediately call your service technician or gas supplier.
If the pilot will not stay lit after several tries, turn the gas
control knob to “OFF” and call your service technician or
gas supplier.
11. Close sight glass cover.
12. Turn gas control knob counterclockwise to “ON”.
13. Replace cabinet.
14. “Turn on all electric power to the appliance”.
15. Set thermostat to desired setting.
1. STOP! Read the information on the safety label.
2. Set thermostat to lowest setting.
3. “Turn off all electric power to the appliance”.
4. Remove cabinet.
5. Push in gas control knob slightly and turn clockwise
to “OFF”.
1. Set the thermostat to it’s lowest setting.
2. “Turn off all electric power to the appliance if service is to be performed”.
3. Open cabinet door.
4. Push in gas control knob slightly and turn clockwise to “OFF”. Do not force.
5. Close cabinet door. P/N 91251 03/07

PILOT ADJUSTMENT
Locate pilot adjustment cap on valve and remove. See Figure 8.
Pilot flame should surround the top 3/8 to ½ inch of powerpile or
thermocouple, see Figure 9. To increase pilot flame, turn pilot
adjustment screw, see Figure 8, counterclockwise. To decrease pilot
flame, turn screw clockwise. After a proper pilot flame is established
replace pilot adjustment cap, be sure gasket located on bottom of
cap head is in place. The gas supply to the pilot is unregulated.
When line pressure exceeds 7” w.c. Natural Gas, 11” w.c. L.P. Gas,
pilot adjustment must be made.
TO REMOVE MAIN BURNER FOR
INSPECTION AND CLEANING
1. Remove outer casing.
2. Disconnect gas supply to valve.
3. Remove 11 screws holding burner door to heat exchanger and
lift out complete burner, valve assembly.
4. After inspecting burner, place back into heat exchanger. Be
sure door gasket is not damaged and will effect a proper seal or
pilot outage will occur.
5. Tighten screws holding burner door to heat exchanger.
6. Connect gas supply back to valve.
7. Install front panel and follow lighting instructions.
NOTE: The furnace and all components must be inspected at least
annually by a qualified service technician. This should include
the burner, heat exchanger, and vent system. Be sure that the
flow of combustion and ventilation air are not obstructed.
BURNERORIFICE
This appliance is orificed at the factory for elevations up to 2,000 ft.
If installed above 2,000 ft., the BTU input must be reduced 4% per
1,000 ft. See the following orifice chart for the proper orifice for a
specific elevation. Orifice change must be completed by a qualified
installer or service technician.
PilotAdj.Screw
Gasket
PilotAdj. Cap
FIGURE8
WIRINGDIAGRAM
PilotGenerator
Leads Thermostat
Wire
WIRINGDIAGRAM
CAUTION: Label all wires prior to disconnec-
tion when servicing controls. Wiring errors can
cause improper and dangerous operation. Verify
proper operation after servicing.
Page 10
FIGURE9
Pilot flame should envelop
3/8” - 1/2” of powerpile
or thermocouple
NATURALGAS
SPECIFICELEVATIONS
MODEL 0 TO 2,000’ 4,000’ 6,000’ 8,000’
NUMBER 2,000’ 4,000’ 6,000’ 8,000’ 10,00’
CDV155B 48 49 50 51 52
CDV255B 2.45mm 41 42 43 44
CDV335B 2.75mm 37 38 40 42
ORDER KIT #49800 44-1 HIGH ALTITUDE KIT
L.P. GAS
SPECIFIC ELEVATIONS
MODEL 0 TO 2,000’ 4,000’ 6,000’ 8,000’
NUMBER 2,000’ 4,000’ 6,000’ 8,000’ 10,00’
CDV156B 1.2mm 56 57 59 60
CDV256B 1.55mm 54 54 55 55
CDV336B 1.65mm 51 52 52 53
ORDER KIT #49800 44-1 HIGH ALTITUDE KIT