Central Boiler CL 4030 User manual

OWNER’S MANUAL
SAVE THESE
INSTRUCTIONS
(p/n 9000961) - REV. A
WARNING: If the information in this manual is not followed exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
– Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Immediately call your gas supplier. Follow the supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
– Installation and service must be performed by a qualied installer, service agency or the gas supplier.
OUTDOOR WOOD FURNACE
CL 4030
TITANIUM
CL 5036
TITANIUM
CL 6048
TITANIUM
0117WH016S
IN THE U.S., THIS APPLIANCE
IS FOR NON-RESIDENTIAL
APPLICATIONS ONLY

CentralBoiler, Inc. • 20502 160th Street • Greenbush, MN 56726
CentralBoiler.com
For parts and accessories, service or repairs, call your authorized Central Boiler dealer or heating contractor. Record
the information below for future reference.
Model Serial Number Installation Date
Dealership Name Phone Number
Owner Name
- Register at time of purchase for FREE 25 Year Limited Warranty -
Verify your warranty and check status of water samples at: CentralBoiler.com/w25
French Owner's Manual and decal set available upon request from your dealer.
(Manuel d'installation en français et décalcomanies disponible sur demande auprès de votre revendeur)
CL 4030 – Water Capacity: 140 gal.(530 liters) – Weight: 1,140 lbs (517 kg)
CL 5036 – Water Capacity: 196 gal. (742 liters) – Weight: 1,492 lbs (677 kg)
CL 6048 – Water Capacity: 393 gal. (1488 liters) – Weight: 2,140 lbs (971 kg)
Central Boiler Classic Titanium models CL 4030, CL 5036 and CL 6048 outdoor hydronic heaters by Central Boiler are listed by
OMNI-Test Laboratories to the applicable portions of the following standards: UL 2523-13 Solid Fuel-Fired Hydronic Heating
Appliances, Water Heaters and Boilers, CSA B366.1-11 (R2015) Solid-Fuel-Fired Central Heating Appliance. Dual Fuel models tested
to applicable portions of ANSI Z21.13-2017/CSA 4.9-2017 - Gas-red Low Pressure Steam and Hot Water Boilers, B140.3-1962
(R2015) - Oil Burning Stoves and Water Heaters, UL 726-11 Standard for Safety Oil-Fired Boiler Assemblies, and certied to add to
an existing heating system.

Contents
How to Use This Guide
e guide is divided into sections
to help with the operation and
maintenance of the outdoor furnace.
If questions arise that are not
answered with this manual, consult
with your authorized CentralBoiler
dealer.
Central Boiler Online Resources................................................................. Iv
EPA Resources ............................................................................... iv
Labeling and Terminology ......................................................................1
Important Precautionary Information ................................................. 2
Foundation...................................................................................4
Access to Ports on Outdoor Furnace ..............................................................5
Ground Rod Kit ...............................................................................7
Furnace Installation - Connecting toYour Existing System ...........................................7
Outdoor Wood Furnace Best Burn Practices........................................................9
Chimney Recommendations ....................................................................9
Chimney Installation...........................................................................9
WATER QUALITY AND MAINTENANCE .................................................. 12
Test Supply Water ............................................................................12
Adding Initial Water Treatment .................................................................12
Immediately Start the Pump(s) and Heat the System Water to 185˚F (85˚C)...........................13
Test the Treated System Water..................................................................14
Send in Initial Water Sample ...................................................................14
Check Status ofWater Sample..................................................................15
Annual Water Sample .........................................................................15
Water Samples...............................................................................15
System Maintenance .........................................................................15
Water Test Kits and Test Results.................................................................16
Flushing the System ..........................................................................17
Adding Antifreeze to Outdoor Furnace System ....................................................18
Wood Selection and Preparation ..................................................... 19
Operating Instructions ............................................................. 20
Initial Fire Up - Start of Heating Season ..........................................................20
Adjusting Water Temperature ..................................................................20
Filling the Firebox ............................................................................21
Adding Heat Load ............................................................................23
Maintenance Schedule ............................................................. 24
Control Locations.............................................................................25
Routine Maintenance .........................................................................25
Maintenance Sections ........................................................................26
Serviceable Items.................................................................. 30
Firebox Door Cam Loc Adjustment ..............................................................30
Firebox Door Seal Rope........................................................................30
Light Bulb...................................................................................31
Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Testing Solenoid .............................................................................32
Replacing/Adjusting Solenoid..................................................................33
Temperature Controller........................................................................34
Water Temperature Sensor.....................................................................35
Testing Water Temperature Sensor ..............................................................35
Replacing Water Temperature Sensor............................................................36
Troubleshooting................................................................... 37
General Information ............................................................... 41
Furnace Measurements............................................................. 42
Wiring Diagrams .................................................................. 43
Water Sample Information - Titanium Series Models .................................... 47

CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
INSTALLATIONS IN MASSACHUSETTS:
1. All installation components must be products approved in the Commonwealth of Massachusetts by the Gas and Plumbing Board.
2. e maximum run of tubing from the water heater to a fan coil is 50 linear feet.
3. Persons operating this hydronic heater are responsible for operation of the hydronic heater so as not to cause a condition of air pollution as
dened in 310 CMR 7.01(1).
Videos to supplement the Owner's Manual are available at
www.youtube.com/centralboilerinc
Watch tips on initial startup, testing system water and more.
CentralBoiler.com/Support
Online Support Center
Write your serial number here for future reference.
EPA RESOURCES
EPA's Burnwise Program - https://www.epa.gov/burnwise
How to Use a Moisture Meter Video - http://www.youtube.com/watch?v=jM2WGgRcnm0
EPA oers tips on how to properly use a moisture meter to test rewood before using in a wood-burning stove or replace. Wet wood can create
excessive smoke which is wasted fuel.
Split, Stack, Cover and Store Video - http://www.youtube.com/watch?v=yo1--Zrh11s
EPA oers four simple steps to properly dry rewood before using in a wood-burning stove or replace. Wet wood can create excessive smoke
which is wasted fuel. Burning dry, seasoned rewood with a moisture content of 20% or less can save money and help reduce harmful air
pollution.
Resources to Help Burn Wood the Right Way - https://www.epa.gov/burnwise/resources-help-you-burn-wood-right-way-and-
promote-burn-wise-program
Find tip sheets, brochure and yers, and more information.
NOTE: The warranty can be voided by operating a residential hydronic heater in a manner inconsistent with the Owner's Manual.
CENTRAL BOILER ONLINE RESOURCES
Enter CentralBoiler.com in your browser or scan the code using any QR code reader app on your smartphone to access
CentralBoiler's library of information to help with installation, operation and maintenance of your CentralBoiler outdoor furnace.
Detailed Furnace Installation Variations - https://www.CentralBoiler.com/explore/furnace-installation/
View and/or download PDFs to assist in installation of your outdoor furnace. Information and examples
regarding pumps, foundations, chimneys and support structures, ermoPEX piping, and example congurations
for a variety of heating congurations.
Online Support Center
https://www.CentralBoiler.com/Support/
Enter your furnace serial number and nd articles,
answers, parts and more information.

1
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Labeling and Terminology
e outdoor furnace and this guide use the following terms and symbols to
bring attention to the presence of hazards of various risk levels and important
information concerning the use and maintenance of the outdoor furnace.
This symbol and text indicate an imminently hazardous situation which, if ignored,
will result in death or serious injury.
This symbol and text indicate the presence of a hazard which can cause severe personal
injury or death to an operator or bystander, or substantial property damage if ignored.
CAUTION
This symbol and text indicate the presence of a hazard which can cause minor personal
injury or property damage if ignored.
NOTE: Indicates supplementary information worthy of particular attention relating
to installation, operation, or maintenance of the outdoor furnace but is not related to a
hazardous condition.
Be sure to follow all instructions and related precautions as they are meant for
your safety and protection. Store this manual in a readily accessible location for
future reference.

2CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Important Precautionary Information
Be sure to read carefully and understand these precautions before, during and after the installation, operation and
maintenance of the furnace.
NOTE: All operations must be in accordance with local and state
codes which may dier from the information in this manual.
CAUTION
This outdoor furnace is not intended to be the only source of
heat. In the event of a prolonged power failure, a generator
may be used to prevent lines from freezing. Should the outdoor
furnace be left unattended, run out of fuel or require service, an
alternate heating source in the building being heated should
be in place to prevent damage caused by freezing.
This outdoor furnace and/or chimney is not intended or safety
tested to be used or installed in a building where contents of
that building could be damaged or where a nancial loss could
occur from smoke, soot, re or water.
The outdoor furnace vent cap must t loosely on the vent
opening. Do not force the cap down or try to seal it tightly onto
theventpipe.Donotextendorrestrictthe ventpipe or opening.
DO NOT ALLOW THE OUTDOOR FURNACE TO BE PRESSURIZED.
REMOVE STRAPPING FROM
VENT BEFORE FILLING
WITH WATER.
Vent Cap Must
Fit Loosely
WARNING
Be sure the outdoor furnace is lled with water before ring.
Never re the outdoor furnace when the water level is more
than 1" (2.5 cm) below the FULL mark on the sight gauge.
MolyArmor 350 must be added before the initial ll (see Water
Quality and Maintenance).
Disconnect the electrical power to the outdoor furnace before
replacing an electrical component.
Do not attempt service inside the electrical control panel
without rst disconnecting the electrical power at the main
power source.
NOTE: Any electrical installation should be done by a qualied
installer in accordance with applicable codes.
Allow the outdoor furnace to thoroughly cool and completely
clean out the rebox before draining water from the outdoor
furnace. If the water in the outdoor furnace ever boils, be sure
to check the water level and restore to full. If water is added,
the proper level of MolyArmor 350 Corrosion Inhibitor (p/n
2900630) must be maintained.
When cleaning the outdoor furnace, be careful not to spill any
coals.
ALWAYS store ash in a covered non-combustible container.
Maintain the following clearances from combustibles for the
furnace installation:
• 44" (112 cm) from the back
• 12" (30.5 cm) from the sides
• 48" (122 cm) from the front
• 18" (46 cm) from chimney inspection cover
• The foundation must be noncombustible
Do not allow combustible materials (straw, hay or wood) near
the outdoor furnace. Keep the perimeter of the outdoor furnace
clear and clean.

3
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
For re safety, keep all combustible materials at least six feet
(two meters) away from the outdoor furnace, especially around
the door area. Debris of wood chips and other combustibles in
the area may be easily ignited if a hot coal is spilled out of the
rebox and left unnoticed.
The rebox door must be closed and latched at all times except
when lling the rebox with wood. Leaving the rebox door
open may lead to a runaway re. In the event of a runaway re,
close the rebox door. In the event of a chimney or soot re,
close the rebox door and make sure power is o to the outdoor
furnace.
All covers must be maintained at all times except during
maintenance, inspection and service.
When opening the rebox door, the door switch will shut o the
primary air actuator motor while the rebox door is open. Do
NOT disable the door switch.
NOTE: The prohibition against burning these materials does not
prohibit the use of re starters made from paper, cardboard, saw
dust, wax and similar substances for the purpose of starting a re
in an aected wood heater.
NOTE: Do not use chemicals or uids to start the re. Use kindling
or gas-red wood ignition option to start an initial re.
NOTE: The sight gauge valve should always be closed, except when
checking water level. Water will automatically drain from the
sight gauge tube when the valve is closed. Remember that this
type of valve requires only 1/4 turn to open or close.
Thisheateris designedtoburn naturalwoodonly. DO NOTBURN:
unseasoned wood, treated wood, colored paper, cardboard,
trash or garbage.
NOTE: Chloride or sulfurous gases can be generated if plastic or
rubber is burned and will mix with the moisture from the wood
and form hydrochloric or sulfuric acids in the rebox, creating
corrosion.
NOTE: This outdoor furnace is not to be used with an automatic
stoker.
CAUTION
This outdoor furnace is not to be connected to a chimney ue
serving another appliance.
When adding wood to the rebox, be careful not to get pinched
between the wood and the door frame, or any part of the
outdoor furnace. Use extreme care with large pieces of wood
that may be dicult to handle.
NOTE: At least one circulation pump must run continuously to
ensure proper operation of the outdoor furnace.
NOTE: A 40-watt appliance light bulb is recommended if
replacement is necessary. Do not install a bulb in excess of 60
watts.
NOTE: In case of a power outage, either a generator or 12V battery
with a power inverter can be used to provide electricity to operate
the outdoor furnace.

4CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Do not use any combustible
materials for the foundation.
CAUTION
Outdoor furnace must be installed on a noncombustible surface or foundation that incorporates an enclosure that will prevent supply and
return lines from possible exposure to sunlight, re, or physical damage that may be caused by an occurrence outside the outdoor furnace
enclosure. Foundation may consist of concrete, crushed rock, or patio blocks.
Classic CL 6048
(Foundation Optional)
Classic CL 5036
(Foundation Optional)
Classic CL 4030
(Foundation Optional)
73"
59"
10"
22"
7"
63"
47"
10"
22"
7"
53"
43"
10"
22"
7"
Foundation
e outdoor furnace may be installed directly on stable, level ground without
the necessity of a foundation, although installing the outdoor furnace on a
foundation oers many advantages. e outdoor furnace is less likely to move
due to frost heaving. A foundation keeps the area directly around the outdoor
furnace free of standing water and can help to keep unwanted pests out. It can
also raise the furnace up to provide a more comfortable height of the rebox
door opening.
If the ground is unstable, one option is to use patio blocks under the perimeter
of the base. Another option is to pour a concrete foundation.
To install the outdoor furnace on a concrete foundation, refer to the illustration
for dimensions and for the location of the hollowed-out area for each model. A
4" to 6" (10 to 15 cm) thick concrete slab works well; however, a thicker slab
may be used to obtain the desired door opening height.
If the area for the concrete slab is unstable and/or aected by frost heaving,
consider installing 2" closed-cell insulation beneath the front portion of the
slab and under the area of the ground used for walking.
CAUTION
Do not use any combustible materials for the foundation.
NOTE: The installation surface or foundation must be noncombustible. The hot supply and
return lines must also be protected from possible exposure to sunlight, re or physical
damage that may be caused by an occurrence outside the outdoor furnace enclosure.
Foundations may consist of concrete, crushed rock or patio blocks.

5
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Access to Ports on Outdoor Furnace
Ports are provided that allow mounting circulation pumps on the outdoor
furnace. Refer to the illustrations in this section for proper supply and return
line and pump installations for your model.
NOTE: The Installation Guide provides more information on pump selection. For even more
detailed information, see the Hydronic Component Selection Guide (p/n 2482), available
from your CentralBoiler dealer.
NOTE: At least one circulation pump must run continuously to ensure proper operation of
the outdoor furnace.
NOTE
A Grounding Rod Kit (p/n 6593)
must be installed with every furnace.
3/4
CENTRAL PEX
Swing
Check
Valve
224
1330
5800033
198
Return
Hot
Supply
556
118
296
CENTRAL PEX
Use a 1/2" x 1/8"
bushing (3042) with
temperature
gauges.
6054
Power disconnect shuts off all power
including pumps.
Return Side View
Central Boiler recommends installing
swing check valves on the return
lines to eliminate reverse flow.
For illustration purposes only.
**For 1-1/4" lines use p/n 5871.
118
1330
PEX Pipe
296**
Swing Check
Valve
198
6054
3042
6764
5926
3/4
p/n Description
1 - Pump Parts List*
224 3/4" Isolation Flange Kits1
5800033 0015e3 Pump1
118 3/4" Close Nipple1
198 3/4" Ball Valve2
1330 3/4" x 1" MPT to PEX2
5926 1" PEX Clamp Crimp Ring4
6593 Grounding Rod Kit1
6054 Temperature Gauge2
3042 1/2" x 1/8" Bushing2
296 3/4" Swing Check Valve1
556 Power Supply Cord, 32"1
Qty
Classic CL 4030/5036 – 1-Pump Conguration

6CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
NOTE
A Grounding Rod Kit (p/n 6593)
must be installed with every furnace.
1330
5800033
5926
388/3851**
556
198
582
118
Return
Hot
Supply
3/4
Swing
Check
Valve
296
1-1/4"
Bung
CENTRAL PEX
533 Top View
274
224
Use a 1/2" x 1/8"
bushing (3042) with
temperature gauges
3/4
3/4
CENTRAL PEX
6054
CENTRAL PEX CENTRAL PEX
CENTRAL PEX
1-1/4"
Bung
p/n Description
3 - Pump Parts List*
*Parts and accessories sold separately.
Pump size may vary.
Power disconnect shuts off all power
including pumps.
Return Side View
Central Boiler recommends installing
swing check valves on the return
lines to eliminate reverse flow.
For illustration purposes only.
**For 1-1/4" lines use p/n 5871.
118
1330
PEX Pipe
296**
Swing Check
Valve
198
6054
3042
6764
5926
3/4
118 3/4" Close Nipple3
5800033 0015e3 Pump3
224 3/4" Isolation Flange Kits3
198 3/4" Ball Valve3
388 1-1/4" x 3/4" Bushing2
296 3/4" Swing Check Valve3
274 3/4" Black 90° Street Elbow2
556 Power Supply Cord, 32"3
582 6 Outlet Converter1
3042 1/2" x 1/8" Bushing4
1330 3/4" x 1" MPT to PEX9
6593 Grounding Rod Kit1
6054 Temperature Gauge4
6764 3/4" x 3/4" x 1/2" Offset Tee2
Qty
Classic CL 6048 – 3-Pump Conguration

7
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Ground Rod Kit
e outdoor furnace must be electrically bonded to ground in accordance with
the requirements of the authority having jurisdiction or, in absence of such
requirements, with the National Electrical Code, ANSI/NFPA 70 and/or the
Canadian Electrical Code Part 1, CSA C22.1 Electrical Code.
Install a Ground Rod Kit (p/n 6593) and connect it to the outdoor furnace.
1. In the water line trench near the outdoor furnace, drive the ground rod
into the ground until the top of the ground rod is below the ground
surface.
2. Route the ground wire from the ground rod under the outdoor furnace
base and over to the frame of the outdoor furnace.
3. Secure the ground terminal with a cap screw (1/4" x 3/4"), star washer
and nut. Secure the ground wire to the terminal; then secure the ground
wire to the ground rod with the clamp. Tighten all hardware securely.
NOTE: A hole for the ground terminal has been pre-punched in the outdoor furnace base
near the pumps.
Furnace Installation - Connecting to Your Existing System
A common installation is to connect the outdoor furnace to an existing water
heater and then to an existing forced air system. A water-to-air heat exchanger
is mounted in the plenum or duct work of the existing furnace. Heated water
from the outdoor furnace either continuously ows through the water-to-air
heat exchanger or is diverted through a 3-way zone valve. When the thermostat
senses the need for heat, the fan on the existing furnace forces air through the
heat exchanger, transferring heat throughout the existing ductwork.
NOTE: There are numerous ways to connect to your heating system. Refer to the
CentralBoiler Outdoor Furnace Installation Guide for other installations.
Detailed Furnace Installation Variations
Visit CentralBoiler.com to access
a library of detailed illustrations
for connecting to a wide variety of
existing heating systems and for
other heating options.

8CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
H
C
M
R
Hot Supply
Water-to-Water
Heat Exchanger
Bypass Line
Thermostatic
Mixing Valve
This horizontal assembly
must not exceed a height
of 4 inches (10 cm) above top
of water heater.
Existing
Water
Heater
1"
Central
PEX®
Optional Bypass
Valve
Heat
Exchanger
Plenum
Existing
Forced Air
Furnace
For illustration purposes only,
water heater styles may vary.
NOTE
A pump must be installed in the hot
supply line between the outdoor furnace
and thermostatic valve. Outdoor furnace
water temperature setpoint should be
set at 185˚F (85˚C) minimum.
NOTE
Installer must comply with all
applicable codes and regulations.
NOTE
Any electrical installation should
be done by a qualified installer
in accordance with applicable
codes.
NOTE: A certified electrician must
do the electrical installation.
Typical Installation
Connecting to Water Heater and Forced Air Furnace
Hot Supply from Pump
on Outdoor Furnace
Return to Outdoor Furnace
Optional Thermostatic Valve
To Heating
System
From Heating
System
Hot Supply from Pump
on Outdoor Furnace
Return to
Outdoor Furnace
Remote
Thermal
Storage
Tank
For illustration purposes only;
system components may vary.
NOTE
Installer must comply with all
applicable codes and regulations.
Remote Thermal Storage Installation
Connecting to Remote Thermal Storage Tank

9
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
NOTE: 4030 Models Only - Remove and discard the shipping tape securing the chimney
restrictor; then position the chimney restrictor about 11" in from the end of the chimney
tee as shown.
11"
(28 cm)
© 2011 Central Boiler
Chimney Recommendations
In higher populated areas, extend the chimney to a height above the roofs
of surrounding buildings. Use CentralBoiler Chimney Extensions when
extending the chimney. When only the standard eight feet (2.4 m) of chimney
are used, the sections must be secured at the connection joint with four (4)
screws to stabilize the extension.
Chimney Installation
NOTE: Instructions for installing chimney sections and the chimney brace assembly are
also provided with the furnace.
1. Remove the two Slotted Hex Screws (p/n 4283) securing the Shipping
Plate to the Chimney Brace Assembly.
2. Discard the Shipping Plate and remove the three Self-Tapping Screws (p/n
4278) from the slot in the chimney brace assembly. ese screws are used
to assemble the chimney sections.
3. Assemble the Chimney Brace Slide (p/n 10854-011) to the Chimney
Rafter Brace (p/n 10853-011) with the two Slotted Hex Screws removed
in step 1. Do not tighten the screws.
4. Remove the single Slotted Hex Screw securing the Chimney Strap (p/n
10792) to the Chimney Brace Slide.
5. Assemble the chimney as shown.
6. Push the chimney against the Chimney Brace Slide; then wrap the
Chimney Strap (p/n 10792) around the chimney and secure with the
Slotted Hex Screw.
7. Level the chimney front to back; then tighten the screws on the Chimney
Brace Slide.
8. Secure the base of the chimney with three Self-Tapping Screws (p/n
4278).
Outdoor Wood Furnace
Best Burn Practices
1. Read and follow all operating
instructions supplied by the
manufacturer.
2. FUEL USED: Only those
listed fuels recommended by the
manufacturer of your unit. Never
use the following: trash, plastics,
gasoline, rubber, naphtha,
household garbage, material
treated with petroleum products
(particle board, railroad ties and
pressure treated wood), leaves,
paper products, and cardboard.
3. LOADING FUEL: For
a more ecient burn, pay
careful attention to loading
times and amounts. Follow
the manufacturer’s written
instructions for recommended
loading times and amounts.
4. STARTERS: Do not use lighter
uids, gasoline, or chemicals.
5. CHIMNEY
RECOMMENDATIONS:
In higher populated areas,
extend the chimney to a height
above the roofs of surrounding
buildings.
6. Always remember to comply
with all applicable state and local
codes.
Be considerate of neighbors when
operating your furnace. If you
use your furnace in the summer
months, be certain your chimney
exhaust is not adversely aecting
neighbors with open windows.

10 CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Rope Seal
p/n 7632
No Rope Seal Needed
p/n 4283 - (5) included
(used to assemble chimney brace)
p/n 4278 - (3) included
(used to secure chimney base)
p/n 10775
p/n 6500000
Use silicone to install
the rope seal in the
chimney.
Turn clockwise
to lock.
p/n 10508
Turn clockwise to lock.
p/n 4283
p/n 10854-011
p/n 10853-011
p/n 10792
(Chimney Strap)
Remove
shipping
plate and
discard
p/n 4278
p/n 4283
p/n 4283
Clamp p/n 10509 and
Screw p/n 3179
Clamp p/n 10509 and
Screw p/n 3179

11
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Chimney Reinforcement Recommendations
for CL 4030, CL 5036, CL 6048, CL 7260 and Pallet Burner
Chimney
Guy-Wire
Band Kit
(p/n 778)
Four Sections
When four sections of chimney
are being used a Chimney
Band Clamp Kit for each joint, a
Chimney Base Bracket Kit and
a Chimney Support Brace Kit*
are recommended.
Five or More Sections
When five or more sections
of chimney are being used a
Chimney Band Clamp Kit for
each joint, a Chimney Base
Bracket Kit, a Chimney
Support Brace Kit and a
Chimney Attachment Ring
(p/n 774) are recommended.
Three Sections
When three sections of
chimney are being used a
Chimney Band Clamp Kit (p/n
4518) for each joint and a
Chimney Base Bracket Kit
(p/n 4519) are recommended.
Fall Zone
If objects are placed in the fall zone of the chimney, a
Chimney Guy-Wire Band Kit (p/n 778) or additional bracing
is recommended.
Chimney Attachment Ring (p/n 774)
Must be located directly below Chimney
Band Clamp to reduce stress on the joint.
Two 1" electrical
conduit (not supplied)
Two 3/4"electrical
conduit (not supplied)
Chimney
Band Clamp
(p/n 4518)
Chimney
Base
Bracket
(p/n 4519)
Chimney
Support
Brace*
Additional bracing may be necessary in
certain areas such as those subject to severe
weather, winds, freezing rain, etc.
Inspect all bracing bi-annually for integrity.
•
•
NOTE
p/n Models
*Chimney Support Brace Chart
8402
4554
CL 7260 & Pallet Burner
CL 4030, CL 5036 & CL 6048
If extensions are added to the standard eight feet (2.4m) of chimney, the chimney
should be reinforced appropriately. e illustration shows chimney support
recommendations when three or more sections are used. When adding sections
of chimney, make sure that there is nothing within the fall zone of the chimney
that could be damaged. If something is located within the fall zone and cannot be
removed, guy wires or braces may need to be installed to prevent a falling chimney
from causing damage.
NOTE: If more than three 4-foot (1.2-m) sections of chimney are used, a support (e.g., a pole, pipe
or other structural support) may be installed from the ground that can withstand wind. Other
reinforcement recommendations are shown.
NOTE: For chimney extensions or chimney replacement, use only genuine Central Boiler
chimney components. Parts are available from an authorized CentralBoiler dealer.
e installation of a spark arrestor is recommended, particularly where there are
dry conditions or where there is combustible material near the unit, unless the
installation of a spark arrestor is prohibited by local requirements.
NOTE: If the screen is left on the chimney cap, the spark arrestor should be inspected and
cleaned as needed.
Use common sense to avoid potential res, including exercising caution when
disposing of ashes, cleaning and refueling. Keep all highly combustible materials
(e.g., gasoline, propane, leaves, pine needles, etc.) away from an operating unit at
all times. Take special precautions in windy conditions.
NOTE: You may need to increase the chimney height if conditions occur that force exhaust to
low levels.

12 CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
WATER QUALITY AND MAINTENANCE
Test Supply Water
Test a sample of the supply water (makeup water) that will be used to ll the
outdoor furnace (softened water is recommended). Test strips for testing pH
are included in the water test kit which is provided with the outdoor furnace.
1. Collect a small sample of the water to be used to ll the outdoor furnace
in a clean container.
2. Dip a test strip from the test kit in the water sample for 1 second and
remove. Shake o excess liquid (very important to prevent water bleed
from one pad to the other). Compare the pH test pad to the color chart at
30 seconds.
3. If the pH level is between 6.5 and 8.0 and there are no other known water
quality problems, then the outdoor furnace may be lled with this water.
4. Water that has a pH level of less than 6.5 or greater than 8.0, or that
has other known water quality problems, should not be used to ll the
furnace. Instead, water should be supplied from a dierent source.
Adding Initial Water Treatment
CAUTION
Avoid damaging your furnace and voiding your warranty. Add water treatment
BEFORE adding water to the system.Water treatment in your outdoor furnace is just as
important as the oil in a car's engine.
MolyArmor 350 Corrosion Inhibitor (p/n 2900630) gives optimum protection
for the furnace water jacket and system parts when it is used to initially treat
the water and is maintained at a minimum of 350 ppm of moly and pH level
between 8.0 and 9.5. One unit of MolyArmor 350 is a 1-gallon (3.78-liter)
container.
MOLYARMOR 350 TREATMENT AMOUNTS
CL 6048 2 gallons
CL 5036 1 gallon
CL 4030 1 gallon
1. Add the recommended amount of MolyArmor 350 to the outdoor
furnace.
NOTE: If the system has a larger than normal water capacity, more MolyArmor 350 should
be added at a recommended rate of 6.5 oz. (190 ml) per 10 gallons (37.8 liters) of system
water. One unit (1 gallon or 3.78 liters) of MolyArmor 350 will treat 200 gallons (757 liters)
of system water.
2. Fill the furnace and system using the instructions to ensure air is purged
from the system - refer to Installation Guide.
SEE HOW IT'S DONE
CentralBoiler.com > Support

13
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Immediately Start the Pump(s) and Heat the System Water
to 185˚F (85˚C)
CAUTION
Be sure the outdoor furnace is lled with water before ring. Never re the outdoor
furnace when the water level is more than 1" (2.5 cm) below the FULL mark on the
sight gauge.
NOTE: The sight gauge valve should always be closed except when checking water level.
Water will automatically drain from the sight gauge tube. Remember that this type of
valve requires only 1/4 turn to open or close.
1. Start the pump(s). Refer to Initial Fire Up -Start of Heating Season to
start the outdoor furnace. Bring the water temperature up to operating
temperature (185˚F or 85˚C) for two hours with the system circulating;
then add water to the full mark. Continue to run the pump and circulate
the water for 24 hours.
NOTE: It is important to bring the water in the system up to operating temperature (i.e.,
185˚F or 85˚C) immediately after lling the system. This also applies any time water is
added to the system.
NOTE: If there are multiple circuits connected to the outdoor furnace, repeat the process
for each circuit.
CAUTION
The water in the system may be hot. Use caution and the appropriate personal
protective equipment (PPE) when checking for leaks.
2. Check the system for leaks. Inspect all ttings and hose ends for any
signs of leakage. Use several dry paper towels and wrap them around and
squeeze each tting, valve and pipe connection. e paper towels will
get wet even if there is a very small leak. Immediately repair any leaks to
eliminate the need for adding water. If a screw-type clamp has been used,
it may be possible to stop a very slow leak at a hose clamp by tightening
the clamp after the system has warmed up and the poly becomes more
pliable. It might also be necessary to install a second hose clamp with the
screw positioned on the opposite side.
NOTE: After a week of operating, use the procedure in step 2 to check the system for leaks
again.
NOTE: If water is added, it is important to bring the water in the system up to operating
temperature (i.e., 185˚F or 85˚C) immediately. Refer to the instructions provided in the
test kit for water testing procedures. If indicated by test results, add MolyArmor 350 as
required. Deterioration due to improper operation and/or maintenance is not covered by
warranty.

14 CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Test the Treated System Water
After circulating the water in the system for at least 24 hours, test the treated
system water for the recommended moly (at least 350 ppm) and pH level
(between 8.0 and 9.5).
CAUTION
The water in the sight gauge may be hot. Use caution when obtaining a sample.
1. To obtain a system water sample, bend the sight gauge tube away from the
outdoor furnace. Before collecting the sample, open the valve and drain
about a quart of water from the sight gauge tube; then carefully ll the
sample container without contaminating the sample. Be sure to properly
install the sight gauge tube and close the valve when nished. e
water in the sight gauge valve and tube will drain when the valve is closed.
2. Dip a test strip from the test kit in the water sample for 1 second and
remove. Shake o excess liquid (very important to prevent water bleed
from one pad to the other). Compare moly test pad to the color chart
within 10 seconds. e moly level must be 350 ppm or more.
3. Compare pH test pad to the color chart at 30 seconds. e pH of the
treated water should be between 8.0 and 9.5.
Maintenance Levels
Test the pH and moly levels after the rst three months and every six months
thereafter, and after adding water to furnace.
NOTE: If using antifreeze, test the pH and Moly levels once each month. If the bacterial
issues occur, the pH will decrease.
NOTE: It should not be necessary to add water to the outdoor furnace more frequently
than once every twelve months. If it is more frequent, either there is a leak in the system
or the outdoor furnace is boiling because of improper operation or maintenance (see
Troubleshooting Section in the Owner's Manual). Be sure to locate and repair the problem
immediately. Frequently adding water can cause deterioration in the water jacket. Each
time water is added, refer to the instructions provided in the test kit for water testing
procedures. If indicated by test results, add MolyArmor 350 as required. Deterioration due
to improper operation and/or maintenance is not covered by warranty.
Send in Initial Water Sample
Your owner's packet contains a Water Sample Kit for submitting an initial
water test and an informational sheet entitled Submitting Water Samples for
Your Titanium Series Outdoor Furnace. Follow the instructions to collect and
submit your initial water sample. Additional Water Samples Kits are available
from your CentralBoiler dealer.
NOTE: Your water sample will be tested and must indicate acceptable levels of water
treatment to qualify for the 25 year warranty.

15
CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
Initial Water Sample
You are required to submit an initial water sample within 30 days of purchase
of your outdoor furnace.
Deferred Installation
If your outdoor furnace is not being installed within 30 days of purchase, you
must email [e-mail] with your name and your furnace serial
number. When the furnace installation is complete, send the water sample
within 10 days of the initial ll.
Check Status of Water Sample
If you have provided an email address, you will receive an email with the results
of your water test. If you did not provide an email address, you will be notied
by mail ONLY if your water sample test is NOT ACCEPTABLE. If your water
sample test is acceptable, you will NOT be notied with a mailed letter. You
can however check the status of your water test online.
Check the status of your water sample at:
CentralBoiler.com/w25
You will need your serial number and postal code. Please allow 2-3 weeks for
results to be available. For a deferred installation, your status will be available
approximately 10 days after you email the deferred installation message. You
can also download additional shipping labels.
Annual Water Sample
You are required to submit a water sample yearly prior to the anniversary date
of your initial installation. Record the anniversary date below:
_________________________
DATE OF INSTALLATION
Water Samples
Maintaining the corrosion inhibitor at a proper level is imperative to
preventing corrosion failures. To qualify for the 25 year warranty, you must
follow the instructions in the Owner's Manual and the Installation and Initial
Water Treatment Guide concerning initial water treatment and maintenance.
When the outdoor furnace is initially put into service, and once a year after
that, you are required to submit a water sample to conrm proper maintenance
and water treatment. No warranty claim can be approved unless the outdoor
furnace registration and the acceptable levels of water treatment are on le at
Central Boiler.
NOTE: It is your responsibility as owner to ensure that your water sample information is
accurate and that you submit your samples on a timely basis as required by the warranty
for your stainless steel outdoor furnace. Failure to do so will result in a one year warranty.

16 CLASSIC OUTDOOR FURNACE • OWNER'S MANUAL
SYSTEM MAINTENANCE
An important part of outdoor furnace maintenance is controlling the quality of
the water in the outdoor furnace.
Water Test Kits and Test Results
DATE pH LEVEL MOLY LEVEL
Record the results of pH and Moly level tests in the table above.
If additional space is needed, record on a separate sheet of paper.
It is very important to keep record of water test results (including the date, pH
and Moly level). e pH and Moly test strips and indicator have a shelf life
of approximately two years that can aect their accuracy. Test kits should be
stored in a dry area at room temperature to obtain maximum accuracy over a
longer period of time.
Biological contamination can occur if the furnace is not heated up to 185˚F
immediately after lling it with inhibitor and water as directed.
NOTE: ANY time water is added to the system, it is extremely important to bring the water
temperature up to operating temperature (185˚F) as soon as possible, even if it is during
the o-season. Failure to bring the water in the system up to operating temperature
immediately after lling the system can allow bacteria present in the water to multiply
and may increase the potential for corrosion in the sytem.
If the test indicates a signicantly lower-than-recommended pH level (below
8.0), add MolyArmor to increase the pH level.
POST HEATING SEASON MAINTENANCE
e water should be left in the outdoor furnace if the outdoor furnace is not
being used for an extended period of time.
1. Refer to the Preventive Maintenance Schedule for a list of operations to
perform.
2. Shut o the power supply to the outdoor furnace.
3. Place a cover over the chimney to keep rain from entering the outdoor
furnace. Clean and oil the chimney ue to the rebox.