Central Boiler Titanium Series User manual

SAVE THESE INSTRUCTIONS
(p/n 9000600 - REV. C) - 28-JUN-2019
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
Some of the information provided in this guide is for reference only. Your actual furnace may dier from those
represented here. ALWAYS refer to your Owner's Manual for information specic to your furnace.
CENTRAL BOILER OUTDOOR FURNACE
INSTALLATION AND
INITIAL WATER TREATMENT GUIDE

CENTRAL BOILER ONLINE RESOURCES
Enter the web address 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://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://CentralBoiler.com/support/
Enter your furnace serial number and nd articles, answers, parts and more information.

How to Use This Guide
Contents
Important Precautionary Information .................................................iv
PLANNING THE LOCATION ............................................................ 1
INSTALLATION PRECAUTIONS....................................................................2
Chimney Recommendations ....................................................................2
GENERAL INSTALLATION INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Potable Water ................................................................................3
1650XL Inhibitor Plus ..........................................................................3
MolyBoost ...................................................................................3
Adding Antifreeze to Outdoor Furnace System .....................................................4
Fittings forTitanium Series Models...............................................................5
Shut-O Valves ...............................................................................5
Ground Rod Kit ...............................................................................5
Supply and Return Lines .......................................................................5
Temporary Above Ground or Winter Installations...................................................6
Digging the Trench ............................................................................6
Underground Electric Wire ......................................................................7
Connecting to Existing Heating System ...........................................................7
SYSTEM COMPONENTS ............................................................... 8
Plan with your heating system in mind ...........................................................8
Pump Selection ...............................................................................8
Pump Installation Guidelines ...................................................................9
Selecting Pump Location ......................................................................10
Ports on Outdoor Furnace......................................................................12
PEX Fittings andTools.........................................................................12
Shut-o Valves ..............................................................................13
Optional Thermostatic Valve ...................................................................13
Manual Air Bleeders ..........................................................................14
CONNECTING TO EXISTING SYSTEMS ................................................... 15
Water Heater ................................................................................15
Existing Forced Air Installations ................................................................16
Water Flow..................................................................................16
Items of Note in Forced Air Installations..........................................................16
Installing Thermostatic Controls for Forced-Air System .............................................19
Heating Multiple Zones .......................................................................23
Hydronic Systems ............................................................................24
Filters ......................................................................................24
Evaluate Your Existing System Before Installation .................................................24
Connecting to an Existing Boiler System - Pressurized..............................................25
Connecting to an Existing Boiler System -Vented .................................................27
Connecting to Hydronic Baseboard Heaters.......................................................29
Hydronic Radiant Systems .....................................................................31
Pool and/or Hot Tub Heating ...................................................................35
FINALIZING THE INSTALLATION ....................................................... 38
1. Test Supply Water ..........................................................................38
2. Remove Strapping Securing the Vent Cap ......................................................38
3. Check for Leaks ............................................................................38
4. Cover Supply and Return Lines ...............................................................39
5. Adding Initial Water Treatment...............................................................39
6. Fill Outdoor Furnace with Water and Purge Air..................................................40
7. Immediately Heat the SystemWater to 185˚F (85˚C) ............................................45
8. Test the Treated System Water in the Outdoor Furnace ...........................................46
9. Titanium Series Models - Send in Water Sample.................................................47
How to Use This Guide
e guide is divided into sections
to help with the installation of the
outdoor furnace and connection
to an existing heating system. e
information provided here represents
common installations, components
and heat emitters. Every system will
be dierent. If questions arise that
are not answered with this guide,
consult with your dealer and/or a
heating professional.

Central Boiler Outdoor Furnace Installation Guide
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 installations must be in accordance with local and
state codes which may dier from the information in this
manual.
NOTE:Anyelectricalinstallationshould bedone byaqualied
installer in accordance with applicable codes.
Do not attempt service inside the electrical control panel
without rst disconnecting the electrical power at the
main power source.
This outdoor furnace is not intended or certied to be
installed inside habitable space. Do not install the outdoor
furnace inside your home.
This outdoor furnace should not be installed in a building
that could be damaged or where a nancial loss could
occur from smoke, soot, re or water.
This outdoor furnace and/or chimney must not be installed
inside or under any conguration or construction that
contains combustible materials as part of the structure
or conguration. The chimney is not intended or safety
tested to be used or installed other than on the furnace
located outside of any structure or enclosure.
Disconnect the electrical power to the outdoor furnace
before replacing an electrical component.
When installing a heat exchanger on an existing hot water
boiler or in a forced air system, be sure none of the existing
system safety controls are disabled.
NOTE: Any changes to an existing boiler system should be
done be a qualied installer in accordance with applicable
codes.
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
• Refer to your Owner's Manual for recommended
maintenance clearances
Do not allow combustible materials (straw, hay or wood)
near the outdoor furnace. Keep the perimeter of the
outdoor furnace clear and clean.
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.
CAUTION
This outdoor furnace is not intended to be connected to a
chimney ue serving another appliance.

1
Central Boiler Outdoor Furnace Installation Guide
PLANNING THE LOCATION
When selecting a suitable location, carefully consider each of the
following:
• Must be installed in accordance to all applicable codes and
regulations.
• Check with your insurance company to see if they have any
location requirements.
• Consider prevailing winds and the direction smoke will travel.
• e shorter the distance between the outdoor furnace and
building(s) being heated, the lower the cost will be for the
installation of the hot supply and return water lines, and
ermoPEX insulation.
• Be sure to maintain the required clearances to combustibles and
recommended maintenance clearances.
• ermoPEX pre-insulated piping is recommended for all
installations. Other types of insulated pipe congurations may
result in high heat loss and increased wood consumption.
• If the ground at the location is unstable or subject to frost
heaving, consider installing 2" (5 cm) closed-cell insulation
under the front portion of the concrete slab the outdoor furnace
will be installed on, and under the area around the slab used
for walking. Your Owner's Manual has more information about
foundations and foundation dimensions.
• If installing an LP tank (for an optional gas-red wood ignition
system, for example), carefully consider the location of, and
the distance to, the LP tank. Refer to your Owner's Manual for
more information.
Before You Begin
To ensure your Central Boiler
outdoor furnace functions as
designed, careful planning and
proper installation are imperative.
is section outlines much of
the information needed to install
the outdoor furnace, select water
lines, install circulation pumps
and connect to your existing heat
emitter(s).
Some of the information provided
in this Installation Guide is for
reference only. For example,
illustrations of furnaces are meant
to be for reference only; your actual
furnace may be dierent.
Always refer to your Owner's
Manual for information specic to
your furnace.
Be sure to read carefully and observe
all of the information, not only in
this guide, but in the entire Owner's
Manual.
If any installation questions arise
that cannot be answered by the
information in this manual, be sure
to contact your dealer.
Optional Gas-red Wood Ignition
Most furnaces can be tted with an
optional gas-red wood ignition.
With just the push of a button, the
power ignition will light the re. It
will also automatically relight the re
if needed, even when you are away
from home. See your dealer for more
information.

2Central Boiler Outdoor Furnace Installation Guide
INSTALLATION PRECAUTIONS
A qualied installer must perform the installation of this supplementary
outdoor furnace and must determine how to install it to be compatible
with the existing heating source.
Chimney Recommendations
NOTE: Chimney recommendations provided here are general in nature. You
should refer to your Owner's Manual for model-specic recommendations and
requirements.
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.
If extensions are added to the standard eight feet (2.4m) of chimney,
the chimney should be reinforced appropriately. Refer to the Owner's
Manual for 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.
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 arrester is recommended, particularly where
there are dry conditions or where there is combustible material near
the unit, unless the installation of a spark arrester is prohibited by local
requirements. 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.
If a spark arrester is used, it must be kept clean enough to allow
unrestricted exhaust ow.
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, fire,
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.
EXAMPLE
(Foundation Optional)
Front
Foundation or No Foundation?
Some outdoor furnaces may
be installed without a concrete
foundation, while some require
a foundation (see your Owner's
Manual). Even if a foundation is
not required, installing the outdoor
furnace on a foundation oers many
advantages to placing it directly on
stable, level ground. 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.
is is an example of a foundation
illustration. See your Owner's
Manual for foundation information
for your model.

3
Central Boiler Outdoor Furnace Installation Guide
GENERAL INSTALLATION INFORMATION
Potable Water
If the outdoor furnace is to heat potable water associated with
commercial food preparation or for heating milk-house hot water, it is
recommended to install a double-wall heat exchanger. Also, when lling
the system with water, a back ow preventer must be installed in the line
used for lling.
1650XL Inhibitor Plus
To aid in protecting the system from corrosion, it is imperative to add
Central Boiler 1650XL Inhibitor Plus (p/n 1650) when initially lling
the system. Your Owner's Manual will identify the recommended
amount of 1650XL Inhibitor Plus for your furnace.
Any time water is added to the system, 1650XL Inhibitor Plus must be
added if a tested water sample indicates it is necessary.
1650XL Inhibitor Plus is composed of common materials and is
biodegradable. However, in keeping with good safety and environmental
practices, the supplier recommends the following if draining treated
system water becomes necessary:
• You may drain the outdoor furnace to a home septic system. Central
Boiler 1650XL Inhibitor Plus is biodegradable and can be properly
treated in a residential septic system. If doing so, however, be careful
not to overow the septic system.
• Do not drain the outdoor furnace in such a manner that the drain
water could in any way contact surface water, stream, river, estuary
(where a river meets a sea), lake, pond, ocean or other types of waters.
• Do not drain to any location within 50 feet (15 meters) of any water
well.
MolyBoost
MolyBoost is an additive that enhances the corrosion protection
properties of 1650XL Inhibitor Plus. When used with 1650XL Inhibitor
Plus, it provides more protection than using 1650XL separately.
MolyBoost does not provide adequate protection alone without
1650XL.
Your Owner's Manual will identify the recommended amount of
MolyBoost for your furnace.
1650XL Inhibitor Plus
1650XL Inhibitor Plus
1650XL Inhibitor Plus polymer solution
provides superior corrosion protection for
the furnace and helps protect exchangers
and pumps against solids adhering to
system parts.
1650XL Inhibitor Plus
MolyBoost
MolyBoost is an additive that enhances
the corrosion protection properties of
1650XL Inhibitor Plus. When used with
1650XL Inhibitor Plus, it provides more
protection than using 1650XL separately.
MolyBoost does not provide adequate
protection alone without 1650XL.
For stainless Titanium Series outdoor
furnaces, adding MolyBoost as part of the
initial treatment is required.

4Central Boiler Outdoor Furnace Installation Guide
Adding Antifreeze to Outdoor Furnace System
Most outdoor furnaces are installed without antifreeze when an existing
heating system is in place and there is no anticipation of leaving the
outdoor furnace unattended for extended periods of time (10 days or
more). If the building being heated has an alternate heat source, system
water may be kept from freezing by running the circulating pump(s)
and drawing heat from the existing furnace or boiler in the home or
building.
To prevent freezing if the outdoor furnace is not red for extended
time periods or if lengthy power outages are anticipated during cold
weather, a nontoxic propylene glycol boiler-type may be used in the
system. Some types of antifreeze that contain various inhibitors have
been known to create problems like coagulation and jelling. To prevent
potential problems, do not use propylene glycol that is premixed
with inhibitors. Central Boiler 1650XL Inhibitor Plus (p/n 1650) is
compatible with (raw) propylene glycol. It is important to use 1650XL
Inhibitor Plus with straight propylene glycol for corrosion protection.
If adding antifreeze to the system, it is imperative that the entire system
contain at least 30% antifreeze concentration mixed with softened,
reverse osmosis or deionized water to prevent bacterial growth and
minimize minerals in the system. Bacterial growth is likely to occur
with low antifreeze concentrations and can cause corrosion in the
furnace water jacket and/or clogging of heat exchangers. To conrm the
antifreeze solution is adequate and to kill bacteria, immediately heat the
system up to 185˚ F, allow the pumps to circulate for at least 24 hours
and then obtain a sample of the system water. Using an antifreeze tester,
the solution must be protected to 10˚F (-12˚C) or below.
NOTE: If using antifreeze, test the pH and nitrite levels once each month.
NOTE: Be sure to adhere to all warnings and precautions on the antifreeze label.
NOTE: Do not use automotive or RV types of antifreeze.
NOTE: If using antifreeze, use Test Kit (p/n 597) when testing the treated water in
the outdoor furnace (see Water Quality and Maintenance in your Owner’s Manual).
Adding Antifreeze to Your Central
Boiler Furnace System
Important information can be found
online if you are thinking about
adding antifreeze to your outdoor
furnace system. Topics covered
include:
• ings to know when purchasing
antifreeze
• Importance of knowing the
concentration
• Freeze protection levels
• Why you should NOT use
inhibited propylene glycol in your
Central Boiler furnace
Download the Adding Antifreeze
to Your Central Boiler Furnace
System (PDF) by visiting:
CentralBoiler.com > Explore >
Owner Resources

5
Central Boiler Outdoor Furnace Installation Guide
Fittings for Titanium Series Models
For stainless steel Titanium Series models, brass ttings are
recommended for installation of the outdoor furnace.
Shut-O Valves
Shut-o valves must be installed on each hot supply and return
water line so each line can be shut o individually for purging air from
the system. Be sure all valves and ttings are metal. Do not use plastic
valves or ttings.
Ground Rod Kit
If required, the 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. Refer to your Owner's Manual for more information.
Supply and Return Lines
Determine the conguration of the supply and return lines from the
outdoor furnace to where the supply and return lines will connect
to the existing heating system. Central Boiler recommends using the
ermoPEX® piping system.
ermoPEX is a fully assembled, pre-insulated piping system consisting
of two 1" Central PEX lines or two 1-1/4" PEX lines. e two lines (one
a supply and one a return line) are insulated with high-density urethane
insulation and a thick, durable, waterproof, polyethylene outer jacket.
One of the lines is marked with a black stripe for identication.
NOTE: To prevent ground water from entering the house, do not use drain tile,
PVC pipe with bubble wrap, or any other inferior material for insulating the water
lines.
NOTE: If the outdoor furnace supply and return lines are not insulated properly, or
if other brands of insulated piping are used, there can be excessive heat loss. This
heat loss can greatly increase the fuel consumption.
NOTE: If it is unavoidable that the trench will run through an area of ponding
water, use ThermoPEX instead of other materials. ThermoPEX should also be used
for above-ground or winter installations, and if the area is likely to be aected by
compaction.
ThermoPEX® Advantage
ermoPEX is exible pre-
insulated piping that is ideal for
use with outdoor wood furnaces.
ermoPEX consists of two 1-inch*
oxygen barrier Central PEX® lines
or two 1-1/4 inch** oxygen barrier
PEX lines (a supply and a return
line). e lines are insulated with
high-density urethane insulation
and a thick, durable, waterproof
polyethylene outer jacket. ermal
expansion is absorbed within the
system because the Central PEX
lines, urethane insulation and the
durable outer jacket are cast together.
e corrugated design allows exing
for easier installation. ermoPEX is
a proven product and maintenance-
free.
*CTS ASTM 1" supply and return.
**CSTS ASTM 1-1/4" supply and return.

6Central Boiler Outdoor Furnace Installation Guide
Temporary Above Ground or Winter Installations
For temporary above ground or winter installations in which the supply
and return lines can not immediately be buried underground, Central
Boiler recommends using ermoPEX. Be sure that both the insulation
and the supply and return lines will not be exposed to ultraviolet rays.
e ermoPEX black exterior jacket has UV protection but the
insulation and water lines inside do not. Use a ermoPEX termination
cap at each end of the installation to protect and seal the insulation from
water.
NOTE: Bury the ThermoPEX as soon as conditions permit (e.g., once the ground has
thawed).
NOTE: If ThermoPEX is installed temporarily above ground, provisions should be
made to prevent possible risk of re coming into contact with the ThermoPEX.
ThermoPEX is constructed of materials that can burn and transfer a re.
CAUTION
If ThermoPEX is installed temporarily above ground, do not cover with
combustible materials (e.g., straw, hay, leaves, etc.).
Digging the Trench
Before digging, be sure to call for utility locator service.
e trench depth for ermoPEX should be between 10" and 28" (25
and 71 cm).
Risks of Inferior Piping
To prevent ground water from
entering the house, do not use drain
tile, PVC pipe with bubble wrap,
or any other inferior material for
insulating the water lines.
If the outdoor furnace supply
and return lines are not insulated
properly, or if other brands of
insulated piping are used, there
can be excessive heat loss. is heat
loss can greatly increase the fuel
consumption.