Weil-McLain Eco Tec 2 Series User manual

is manual must only be used by a qualied heating installer/service technician. Read all instructions, including this manual and
all other information shipped with the boiler, before installing. Perform steps in the order given. Failure to comply could result in
severe personal injury, death or substantial property damage.
Part number 550-100-270/0122
• Installation
• Startup
• Maintenance
• Parts
Boiler Manual
Now With Built-In
Bluetooth®Capability
Series 2
80/110/150/199
Wall Mount Gas - Fired
Condensing Boilers – Combi and Heating Only Models

Part number 550-100-270/0122
2
ECO®Tec series 2 gas-fired water boiler – boiler manual
Contents
The ECO Tec Gas-red water boilers . . . . . . . . . . . . . .3
Please read before proceeding . . . . . . . . . . . . . . . . . . 6
Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Prepare boiler location . . . . . . . . . . . . . . . . . . . . . . 9
Wall-mounting the boiler . . . . . . . . . . . . . . . . . . . . 10
Boiler hydrostatic test. . . . . . . . . . . . . . . . . . . . . . 12
Gas conversions. . . . . . . . . . . . . . . . . . . . . . . . . 14
Gas piping — sizing gas lines
. . . . . . . . . . . . . . . . . 19
Venting/air piping — general . . . . . . . . . . . . . . . . . . 20
Commonwealth of Massachusetts installations. . . . . . . . 24
Vent termination requirements . . . . . . . . . . . . . . . . . 25
Boiler room air openings . . . . . . . . . . . . . . . . . . . . 26
Vent and air piping and boiler connections . . . . . . . . . . 27
DIRECT VENT — Sidewall with separate pipes . . . . . . . . 28
DIRECT VENT — Sidewall concentric . . . . . . . . . . . . . 30
DIRECT VENT — Sidewall with W-M vent/air plate
. . . . . . 32
DIRECT VENT — Vertical with separate pipes. . . . . . . . . 34
DIRECT VENT — Vertical concentric. . . . . . . . . . . . . . 36
DIRECT VENT — Vertical vent /sidewall air . . . . . . . . . . 38
DIRECT Exhaust - Kit Option . . . . . . . . . . . . . . . . . . 40
Concentric termination, typical (sidewall or vertical) . . . . . 41
Install boiler water piping . . . . . . . . . . . . . . . . . . . . 42
Direct Connect System Piping - Single Boiler System 80/110/150
Boilers only . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Verify the application will work: . . . . . . . . . . . . . . . . . . . 47
Expansion tank location . . . . . . . . . . . . . . . . . . . . . . . 47
Diaphragm- or bladder-type tank: . . . . . . . . . . . . . . . . . . 47
Closed-type expansion tank:
. . . . . . . . . . . . . . . . . . . . 48
Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
ZONE VALVE zoning – direct connection . . . . . . . . . . . . . . 50
Primary/Secondary System Piping - Single Boiler System. . 51
Expansion tank location . . . . . . . . . . . . . . . . . . . . . . . 51
Diaphragm- or bladder-type tank: . . . . . . . . . . . . . . . . . . 51
Closed-type expansion tank . . . . . . . . . . . . . . . . . . . . . 51
Install relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
System water piping methods . . . . . . . . . . . . . . . . . . . . 53
ZONE VALVE zoning – primary/secondary . . . . . . . . . . . . . . . .54
Circulator zoning – primary/secondary . . . . . . . . . . . . . . . . . . 55
Circulator zoning – Multiple temperature zones with primary/secondary . ..56
Install condensate drain line & trap assembly . . . . . . . . 57
Gas piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Wiring diagram — schematic . . . . . . . . . . . . . . . . . . 68
Wiring diagram — ladder . . . . . . . . . . . . . . . . . . . . 70
e following dened terms are used throughout this manual to bring attention to the presence of hazards of various risk levels
or to important information concerning the life of the product.
Indicates presence of hazards that will cause
severe personal injury, death or substantial
property damage.
Indicates presence of hazards that can cause severe
personal injury, death or substantial property
damage.
Indicates presence of hazards that will or can cause
minor personal injury or property damage.
Indicates special instructions on installation,
operation or maintenance that are important but
not related to personal injury or property damage.

Zoning with the ECO Tec Control . . . . . . . . . . . . . . . 72
ECO Tec control operation . . . . . . . . . . . . . . . . . . . 74
Control settings menus . . . . . . . . . . . . . . . . . . . . . 78
EXPRESS SETUP — Example A . . . . . . . . . . . . . . . . 79
EXPRESS SETUP — Example B
. . . . . . . . . . . . . . . . 89
EXPRESS SETUP — Example C
. . . . . . . . . . . . . . . . 98
EXPRESS SETUP — Example D
. . . . . . . . . . . . . . . .100
HOMEOWNER NAVIGATION menus . . . . . . . . . . . . . .102
BLUETOOTH . . . . . . . . . . . . . . . . . . . . . . . . . . .103
CONTRACTOR menus
. . . . . . . . . . . . . . . . . . . . .104
BOILER SETTINGS menus . . . . . . . . . . . . . . . . . . .105
System Settings . . . . . . . . . . . . . . . . . . . . . . . . .106
Boiler Priority menus . . . . . . . . . . . . . . . . . . . . . .107
Available control settings and system presets . . . . . . . .112
Congure Inputs and Outputs
. . . . . . . . . . . . . . . . .114
AUX Pump/Output . . . . . . . . . . . . . . . . . . . . . . . .115
DIAGNOSTIC menu . . . . . . . . . . . . . . . . . . . . . . .116
SERVICE menus . . . . . . . . . . . . . . . . . . . . . . . . .118
Startup — ll the system . . . . . . . . . . . . . . . . . . . .119
Startup — nal checks . . . . . . . . . . . . . . . . . . . . .121
Check-out/startup verication . . . . . . . . . . . . . . . . .126
Annual startup and general maintenance . . . . . . . . . . .127
Annual startup . . . . . . . . . . . . . . . . . . . . . . . . . .128
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .136
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Cleaning heat exchanger ue side . . . . . . . . . . . . . . .149
Cleaning DHW and Brazed Plate Heat Exchanger. . . . . . .153
Cleaning/maintenance for Domestic Water Inlet & Outlet Manifolds . . 156
Replacement parts . . . . . . . . . . . . . . . . . . . . . . .158
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .170
Ratings – ECO Tec Boilers . . . . . . . . . . . . . . . . . . .171
Ratings — FCC Statement of compliance . . . . . . . . . . .173
Installation and Service Certicate. . . . . . . . . . . . . . .173
Installation and Gas Boiler Data Collection Sheet
. . . . . .174
DO NOT SERVICE THE BOILER
WITHOUT AN ECOTec
MAINTENANCE KIT AVAILABLE
e maintenance kit includes components that may have to be
replaced when accessing or disassembling parts of the boiler.
Failure to replace damaged components and to use only the
parts specically intended for the boiler can result in severe
personal injury, death or substantial property damage. See
Figure145,page159 for part number.

Part number 550-100-270/0122 3
ECO®Tec series 2 gas-fired water boiler – boiler manual
1. Stainlesssteelretubeheatexchanger
e corrosion resistant re tube heat exchanger is our method of
transferring heat from the combustion chamber to the water.
2. Heatexchangercoverplate/burnermountingplate
Note ! : Combi shows cover plate (Item 2) (insulation removed for clarity),
Heating Only has insulation covering shown.
3. Blower
e advanced blower design and air inlet silencer on ECO Tec boilers
results in very quiet operation. Air enters the boiler enclosure through
the air intake adapter (Item 21), ows through the enclosure, enters
the air inlet silencer (Item 5), then enters the venturi (Item 6) where it
mixes with gas before entering the blower. e blower pulls air through
these components and then pushes it through the cover plate (Item 2)
to the burner (Item 13- not shown).
4. Gasvalve
e automatic gas valve references the pressure in the cabinet and
allows gas to ow when the control (Item 18) applies power. (An on/
o switch is attached to the gas valve. It allows the shutting o of the
gas supply for servicing or shut down).
5. Airinletsilencer
e horn-shaped air inlet silencer signicantly reduces fan noise,
providing exceptionally quiet operation.
6. Venturi
When air ows through the venturi, a negative pressure is created.
is causes gas to ow from the gas valve into the venturi, where it is
mixed with the air. e gas/air mixture then continues into the blower.
7. BoilerCirculator
e pump is used to circulate hot water from the boiler, and then pass
it into heating system or the brazed plate heat exchanger.
8. BoilerOutwatertemperaturedualsensor
is dual sensor monitors boiler outlet water temperature. e control
adjusts boiler ring rate so the outlet water temperature is correct,
based on the calculated (if outdoor reset used — see page171) or xed
target temperature.
9. BoilerInwatertemperaturesensor
is sensor monitors boiler in water temperature. e Control may
reduce boiler input depending on if the boiler in and boiler out water
temperature dierence is too large.
10.Electronicdisplay
e electronic color touch screen display is used to congure boiler
settings and monitor boiler operation. is display allows changing
display mode, selecting and adjusting control settings, and resetting
the control aer lockout.
11.Flueadapter(ts3"PVC,3"PP,and3"SS)
12.BoilerFluepipe
Internal ue pipe that carries exhaust gasses from heat exchanger to
vent/ue adapter.
13.Burner(notshown)
Made with high-grade stainless steel construction, the burner uses pre-
mixed air and gas. e burner and control provide modulating ring.
14.Boilerwateroutletpipe1"MaleNPT(BoilerSupply)
15.Boilerwaterinletpipe1"MaleNPT(BoilerReturn)
16.LWCOport/plug3/4"NPT
is plug can be removed to install a low water cut-o (LWCO).
17.Gas line
is stainless steel exible gas line connects the incoming gas line to the
gas valve. e gas line has a ½” Male NPT connection for installation.
18.Circuitboardmodule(seepage74)
19.Airpressureswitch
Air pressure switch monitors maximum ue pressure.
20.Highvoltagejunctionbox – 120VAC eld wiring connections.
21.Airintakeadapter(ts3"PVC,3"PP,and3"SS)
22a.Electricalentrances(linevoltage)
e bottom middle knockouts are designated for line voltage wiring
only. Ensure all wiring entrances are sealed.
22b.Electricalentrances(lowvoltage)
e bottom right side and top right knockouts are designated for low
voltage wiring only. Ensure all wiring entrances are sealed.
23.Boilerdrainvalve(notshown)
Shipped loose for eld piping. Pipe drain valve on reducing tee at the
lowest point of return piping to boiler. See instructions, page13 in this
manual.
24.Condensatetube
e outlet at the bottom of the boiler to drain condensate. e condensate
trap assembly attaches here.
25.Fluegascondensatedraintrapassembly(notshown)
e condensate trap assembly is eld-installed, condensate drain trap
is connected to the condensate tube (Item 24) as shown in this manual.
26.Jacketdoor
The jacket door is sealed to the boiler assembly around its entire
perimeter.
27.Doorlatches
Two (2) latches secure the door in place.
28.Ignitionelectrode/amesensor(shownonCombi,page5)
e burner ame is ignited by applying a high voltage to the ignition
electrode. is causes a spark (from electrode to ground). Aer ignition,
the electrode measures ame signal.
29.Flameinspectionwindow(shownonCombi,page5)
e quartz glass window provides a view of the burner surface and the
ame.
30.Fluegasdualsensor
is dual sensor monitors the ue gas exit temperature. e control
will shut down the boiler if flue gas temperature gets too hot.
is protects the ue pipe and the heat exchanger from overheating.
31.
Transformer
e 120V/24V transformer provides 24V to low voltage control circuitry.
Do NOT splice wiring into transformer.
32.Airba󰀪e
e air bae protects internal boiler components by diverting any
incoming moisture or debris away from critical components.
33.DHW-Brazedplate(CombiOnly)
is secondary heat exchanger allows heat to transfer from the boiler
to the domestic water.
34.DHW-Outletwatertemperaturesensor(CombiOnly)
 (notshown)
is sensor monitors domestic hot water leaving the brazed plate. e
control reduces or increase boiler input, depending on how close the
water is to target set point.
35.DHW-3-wayvalve(CombiOnly)
is valve will change boiler water ow either through the brazed plate
or bypass the braze plate and out to the heating system.
36.DHW - 3-wayvalveActuator (CombiOnly)
is valve will change boiler water ow either through the brazed plate
or bypass the braze plate and out to the heating system.
37.DHW-Flowsensor (CombiOnly)
is sensor monitors the DHW (domestic hot water) ow rate. When
ows 0.5 GPM or greater are detected, the boiler control will allow the
boiler to turn on and modulate accordingly.
38.WaterPipe–AirElimination/ReliefValveConnection3/4"MaleNPT
Use 3/4" tee and 3/4" street elbow to connect relief valve. It is
recommended to connect an automatic air vent to top tee connection.
39.DHWInletPipe-3/4"NPT(CombiOnly)
40.DHW OutletPipe-3/4"NPT(CombiOnly)
The ECO Tec 

Part number 550-100-270/0122
4
ECO®Tec series 2 gas-fired water boiler – boiler manual
The ECOTec
(ECO Tec80modelshownbelow)

Part number 550-100-270/0122 5
ECO®Tec series 2 gas-fired water boiler – boiler manual
The ECO Tec
(ECO Tec80modelshownbelow)

Part number 550-100-270/0122
6
ECO®Tec series 2 gas-fired water boiler – boiler manual
Failuretoadheretotheguidelinesbelowcanresultinseverepersonalinjury,deathorsubstantialpropertydamage
EXPANSION TANK
• Relieve pressure from the system
before isolating the expansion tank.

• To avoid electric shock, disconnect all
electrical supplies to the boiler before
performing maintenance.
• To avoid severe burns, allow boiler to
cool before performing maintenance.
• This boiler contains ceramic fiber
and fiberglass materials. Refer to
the WARNING and instructions on
page128.
Boileroperation—
• Do not block ow of combustion or
ventilation air to boiler.
• Should overheating occur or gas supply
fail to shut off, do not turn off or
disconnect electrical supply to circulator.
Instead, shut off the gas supply at a
location external to the appliance.
Combustionair—
• DO NOT install combustion air intake
where there is a risk of combustion air
contamination.
Carbonmonoxidedetector—
• A carbon monoxide detector that is
wired on the same electrical circuit as
the boiler is strongly recommended.
SURGEPROTECTOR—
• Provide surge protection in the boiler
power supply. This will reduce the
possibility of damage to the boiler
control.

• e ECO Tec heat exchanger is made of
stainless steel, and requires that system
water chemistry be within the limits in
this manual. ADDITIONAL CHEMICAL
TREATMENTMAYBENECESSARY. See
page119 for details.
• oroughly ush the system (BEFORE
connecting boiler) to remove sediment.
e high-eciency heat exchanger can
be damaged by build-up or corrosion
due to sediment.
• Do not use petroleum-based cleaning
or sealing compounds in boiler system.
Gaskets and seals in the system may be
damaged. is can result in substantial
property damage.
• Continual fresh make-up water will
reduce boiler life. Mineral buildup in
eat exchanger reduces heat transfer,
overheats the stainless steel heat
exchanger, and causes failure. Addition
of oxygen carried in by make-up water
can cause internal corrosion. Leaks in
boiler or piping must be repaired at once
to prevent make-up water. Use this boiler
ONLY in a closed-loop system.
• Do not add cold water to a hot boiler.
Thermal shock can cause the heat
exchanger to crack.

• NEVER use automotive or standard
glycol antifreeze. Use only freeze-
protection fluids made for hydronic
systems. Follow all guidelines given by
the antifreeze manufacturer. oroughly
clean and ush any replacement boiler
system that has used glycol before
installing the new boiler. Use only the
products listed by WM Technologies
for use with this boiler. See page 120
for details.
Frozen Water Damage
Hazard
Residences or buildings that are unattended
in severely cold weather, boiler system
components failures, power outages, or
other electrical system failures could
result in frozen plumbing and water
damage in a matter of hours. For your
protection, take preventative actions such
as having a security system installed that
operates during power outages, senses
low temperature, and initiates an eective
action. Consult with your boiler contractor
or a home security agency.
Ifanypartofaboiler,burneroritscontrolshas
beensprayedwithorsubmergedunderwater,
eitherpartiallyorfully,DONOTattempttooperate
theboileruntiltheboilerhasbeeneitherreplaced
orcompletelyrepaired,inspected,andyouare
sure that the boiler and all components are in
goodconditionandfullyreliable.
Otherwise, by operating this boiler, you will
cause a re or explosion hazard, and an electrical
shock hazard, leading to serious injury, death, or
substantial property damage. See the instructions
at right.
Saltwater Damage — The exposure of boiler components to
saltwater can have both immediate and long-term eects. While
the immediate eects of saltwater damage are similar to those of
freshwater (shorting out of electrical components, washing out
of critical lubricants, etc.), the salt and other contaminants left
behind can lead to longer term issues aer the water is gone due to
the conductive and corrosive nature of the salt residue. erefore,
Weil-McLain equipment contaminated with saltwater or polluted
water will no longer be covered under warranty and should be replaced.
ElectricalDamage — If any electricalcomponent or wiring came
into contact with water, or was suspected to have come into contact
with water, replace the boiler with a new Weil-McLain boiler.


When the boiler is installed within the Commonwealth of Massachusetts:
• is product must be installed by a licensed plumber or gas tter.
• If antifreeze is used, a reduced pressure back-ow preventer device shall be used.
• Sidewall vent air installations — see instruction on page24.
Installer— Read all instructions, including this manual
and all other information shipped with the boiler,
before installing. Perform steps in the order given.
User— is manual is for use only by a qualied
heating installer/service technician. Refer to User’s
Information Manual for your reference.
User — Have this boiler serviced/inspected by a
qualied service technician, at least annually.
Failure to comply with the above could result in severe
personal injury, death or substantial property damage.
Write in the Consumer Protection (CP) number in the
space provided on the Installation certicate on page173
if not already shown.
When calling or writing about the boiler— Please have
the boiler model number from the boiler rating label
and the CP number from the boiler jacket.
Consider piping and installation when determining
boiler location.
Any claims for damage or shortage in shipment must be
led immediately against the transportation company
by the consignee.


Part number 550-100-270/0122 7
ECO®Tec series 2 gas-fired water boiler – boiler manual

• Local, state, provincial, and national codes, laws,
regulations and ordinances.
• National Fuel Gas Code, ANSI Z223.1/NFPA 54 –
latest edition.
•National Electrical Code ANSI/NFPA 70 – latest edition.
Electrical installation and grounding must be in
accordance with CSA C22.1, Part 1, Canadian Electrical
Code, and/or local codes.
• For Canada only: CAN/CSA B149.1, Natural Gas and
Propane Installation Code, and any local codes.
• Where required by the authority having jurisdiction, the
installation must conform to the Standard for Controls
and Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1 – latest edition.
e boiler gas manifold and controls met safe
lighting and other performance criteria when
boiler underwent tests specied in ANSI
Z21.13 – latest edition.
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) this device
may not cause harmful interference, and
(2) this device must accept any interference
received, including interference that may cause
undesired operation.

1. e boiler can be oor-standing with optional kit or
wall mounted.
2. Wall construction — If the boiler is wall-mounted,
make sure the wall construction is suitable to carry
the weight of the boiler and components. See page10
for instructions.
3. e boiler is suitable for INDOOR installation only.
4. Check for nearby connection to:
• System water piping • Venting connections
• Gas supply piping • Electrical power
• Condensate drain
5. Check area around boiler. Remove any combustible
materials, gasoline and other ammable liquids.
Failure to keep boiler area clear and free of
combustible materials, gasoline and other
ammable liquids and vapors can result in
severe personal injury, death or substantial
property damage.
6. e boiler must be installed so that gas control system
components are protected from dripping or spraying
water or rain during operation or service.
7. If new boiler will replace existing boiler, check for and
correct system problems, such as:
• Sediment or corrosion in system piping — clean
and ush piping BEFORE connecting the new
boiler. See page119.
• System leaks causing oxygen corrosion or heat
exchanger cracks from hard water deposits.
• Incorrectly-sized expansion tank.
• Lack of freeze protection in boiler water causing
system and boiler to freeze and leak.

Take the following special precautions when installing the boiler in a residential
garage. If the boiler is located in a residential garage:
• Mount the boiler with its burner and igniter are at least 18inches above
the oor. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54
for U. S. installations, or Natural Gas and Propane Installation Code,
CSA B149.1 and B149.2 for Canadian installations.
• Locate or protect the boiler so it cannot be damaged by a moving vehicle.
• Ensure that the installation complies with all applicable codes.
• Prevent boiler water and condensate from freezing.

e ECO Tec boiler is certied as a Direct Vent appliance. It can be converted
to Direct Exhaust by using the Approved Weil-McLain Direct Exhaust kit.
• Direct vent (sealed combustion) where combustion air is ducted from
outdoors.
• Direct exhaust where combustion air is obtained directly from the boiler
room.
      ECO Tec

1. No air ventilation openings into boiler room are needed if Direct vent and
clearances around boiler are at least equal to the SERVICE clearances shown
in Figure1,page8.
2. For spaces that DO NOT supply the minimum service clearances, provide two
openings as shown in Figure2,page8. Each opening must provide 1square
inch free area per 1,000 Btuh of boiler input.
e space must be provided with combustion/ventilation
air openings correctly sized for all appliances located in
the same space as the ECO Tec boiler.
Reinstall boiler jacket door aer servicing. e boiler jacket
door must be securely fastened to the boiler to prevent
boiler from drawing air from inside the boiler room. is
is particularly important if the boiler is located in the same
room as other appliances.
Failure to comply with the above warnings could result in
severe personal injury, death or substantial property damage.
ECO Tec

Follow the sizing requirements shown in Figure29,page26.

1. The boiler requires a special vent system, designed for pressurized
venting. e boilers are rated ANSI Z21.13 Category IV (pressurized vent,
likely to condense in the vent). See instructions beginning on page20.
2. You must also install air piping from outdoors to the boiler air intake adapter.
e resultant installation is categorized as direct vent (sealed combustion).
Note prevention of combustion air contamination on page20 when
considering vent/air termination.
3. Direct exhaust venting can be done with the approved Weil-McLain Direct
Exhaust Kit, please see page159 for kit information.
4. Vent and air must terminate near one another unless otherwise specied in
this manual. Vent and air piping may be routed vertically through the roof
or out a side wall, following the options given in this manual. You may use
any of the vent/air piping methods covered in this manual. Do not attempt
to install the boiler using any other means.
5. Be sure to locate the boiler such that the vent and air piping can be routed
through the building and properly terminated. e vent/air piping lengths,
routing and termination method must all comply with the methods and limits
in instructions beginning on page20.


Part number 550-100-270/0122
8
ECO®Tec series 2 gas-fired water boiler – boiler manual
A. Provide combustion air/ventilation openings per Figure29,page26 or as
otherwise directed in this manual or by applicable codes. If the
installation does not provide the minimum clearances in Figure1, then the
enclosure MUST HAVE air openings located per Figure2, above. Each of these
air openings must have free area of at least 1square inch per 1,000 MBH of
boiler input.
B. Le side clearance to combustibles =2.5 inches minimum.
C. Top of boiler clearance to combustibles = 13.00 inches minimum.
D. Right side clearance to combustibles = 2.5 inches minimum.
E. Bottom of boiler clearance to combustibles = 8.75 inches minimum (must be
18inches above oor for garage installations) for wall hung installation, 0 inches
minimum for oor standing installation.
F. Clearance in front of the boiler = 0.5 inches, but 24 inches minimum required for
service.
G. Air openings must be located in the FRONT of the enclosure, as shown. ey
must be no more than 12inches from the oor or ceiling, as shown.
H. Vent pipe must be minimum 3/16 inch from combustibles. Opening in
combustible wall, oor, ceiling or roof must be 3/8 inches larger than ue pipe
diameter, tted with corrosion resistant steel thimble, or larger if required by
codes or as specied by vent pipe manufacturer.
A. Le side service clearance = 3 inches minimum.
B. Service clearance above top of boiler = 15 inches
minimum.
C. Right side service clearance = 3 inches minimum.
D. Service clearance below the boiler = 12 inches
minimum for wall hung installation, 0 inches
minimum for oor standing installation.
E. Service clearance in front of the boiler = 24 inches
minimum.
ADDITIONAL service clearance may
be needed, depending on how piping
is routed to the boiler.


1. See Figure1 for recommended service clearances.
2. If you do not provide minimum service clearances
shown, it might not be possible to service the boiler
without removing it from the space.
Closet or small-enclosure installations which do
notprovideatleasttheserecommendedclearances
requirethespecially-sizedandplacedairopenings
showninFigure2.


1. See Figure2 for REQUIRED minimum clearances. ALL
installation must provide at least these minimums.
2. Hot water pipes — at least ½ inches from combustible materials.
3. Vent pipe — at least 3/16 inches from combustible materials.
4. See Figure1 for service clearance minimums.
Closet or small-enclosure installations which do
not provide at least the recommended service
clearancesshowninFigure1 requirethespecially-
sizedandplacedairopeningsshowninFigure2.
 
Figure2  minimum clearances
(alldimensionsareininches)
Figure1 RECOMMENDED service
clearances
(alldimensionsareininches)

Part number 550-100-270/0122 9
ECO®Tec series 2 gas-fired water boiler – boiler manual



With the optional floor standing pedestal kit, the boiler is
approved for installation on combustible ooring, but must never
be installed on carpeting.
Do not install boiler on carpeting even if foundation
is used. Fire can result, causing severe personal
injury, death or substantial property damage.

1. Provide a solid foundation pad, at least 2 inches above the
oor, if any of the following is true:
• oor can become ooded,
• e oor is dirt, sand, gravel or other loose material,
• e boiler mounting area is severely uneven or sloped.
2. e minimum foundation size is:
• ECO Tec: 20 inches wide x 20 inches deep.
3. Foundation may be of wood, brick or concrete (minimum
2 inches thick) construction.
If ooding is possible, elevate boiler suciently to prevent
water from reaching boiler.

The boiler is heavy. Use caution not to drop
the boiler or cause bodily injury while lifting
and handling. Verify that the boiler is securely
attached to prevent possibility of boiler falling aer
installation.
After the boiler is removed from the shipping
carton, DO NOT allow the boiler to sit on its
bottom. is would cause pressure on protruding
plastic, resulting in interior damage. Either lay
the boiler on its back or leave on the styrofoam
protective shipping base.
Do not drop boiler or bump jacket on oor or pallet.
Damage to boiler can result.
Cold weather handling — If boiler has been
stored in a very cold location (below 0°F) before
installation, handle with care until the plastic
components come to room temperature.
1. The ECO Tec boiler is generally easier to handle and
maneuver aer removing the shipping container.
2. Remove Items1, 2, 3, 4, and 6 in Figure3. Remove trim kit
and parts from Item4.
3. Leavetheboilerrestingonthestyrofoamprotective
base (Item7) and bottom cardboard cap (Item8), until ready
to place on the wall. If removing the boiler from the shipping
base, rest the boiler on its back, NOT on its bottom.
Failure to comply with the procedure given could
result in severe personal injury, death or substantial
property damage.
1 Cardboard cap, top
2 Cardboard angles
3 Pad
4 Styrofoam protective cap
5 Boiler
6 Cardboard sleeve
7 Styrofoam protective base
8 Cardboard cap, bottom

Figure3 Boiler shipping container
ECOTec
Boiler
Model
HeatingOnly Combi
Without
Pedestal
lbs.
With
Pedestal
lbs.
Without
Pedestal
lbs.
With
Pedestal
lbs.
80/110 141 163 152 174
150 162 184 172 194
199 178 200 187 209
Table1 Boiler operating weights

Part number 550-100-270/0122
10
ECO®Tec series 2 gas-fired water boiler – boiler manual
6. Remove the mounting bracket and drill holes 1/4"
diameter by 3 inches deep, centered on the screw slot
outlines. (For metal stud walls, drill required clearance
holes.)
7. Position the wall-mount bracket on the wall. Insert
and loosely tighten the two (2) lag screws (or toggle
bolts for metal studs).
8. Level the wall-mounting bracket. Then tighten
lag screws securely. For drywall or plaster lathe
installations, avoid tightening so much that the bracket
digs into the wall surface.
9. Once bracket is installed and leveled it is recommended
to install additional screws in center holes to fully
secure to mounting surface.

1. See Figure4. e wall-mount bracket must be installed
before mounting the boiler.
2. Measure 17 1/2 inches below the bottom edge of the
wall-mount bracket (Item 2). Strike a line or place
a piece of masking tape with its top edge even with
the 17 1/2-inch mark. (is line, or tape, will indicate
whether the boiler has been properly seated onto the
wall-mount bracket.)
The boiler is heavy, and requires two
people to li and place. Wear non-slip leather
gloves to prevent possibility of cuts from
sheet metal edges.
1 Studs — Pre-drill through the wall into the studs ¼ inch diameter
x 3 inches deep — Studs must be on 16-inch centers. If studs are
any other spacing, provide a secure, solid mounting surface on
which to attach the boiler wall-mounting bracket.
2 Wall-mount bracket — secure wall mount bracket to wall as
instructed on previous page.
3 Boiler mounting bracket (Figure 6 back of boiler).
4 Floor surface.
1 Studs — Pre-drill through the wall into the studs ¼ inch diameter x 3 inches deep
for
3/8-inch lag screws— Studs must be on 16-inch centers. If studs are any other
spacing, provide a secure, solid mounting surface on which to attach the boiler
wall-mounting bracket.
2 Wall-mount bracket.


DO NOT attempt to attach the wall mount bracket using
anchors or any means other than directly securing to
the wall studs (or equivalent wood structure if studs are
not on 16-inch centers).
Thewallmustbeverticallyplumband capableof
carryingtheweightoftheboilerandanyattached
pipingcomponents.
1. is boiler includes a wall template to aid in installation, unfold the
template and place it against the wall to aid in locating mounting
holes and ensuring proper clearance.
2. Stud spacing: Bracket holes are spaced for studs on 16-inch
centers. For other stud spacing, provide secure, solid mounting
surface on which to attach the boiler wall-mounting bracket.
3. Wood stud wall: Install bracket with lag screws (3/8" x 3") included
in kit, only into the studs.
4. Metal stud wall: Secure bracket and spacer board to studs with
the appropriate size bolts and washers that can handle the boiler's
operating weight listed on page9 and any additional weight from
venting and gas/water piping to be determined by contractor /
installer (hardware not included with kit).
Verify that the studs are suitable for carrying a wall-
mounted load. Some metal studs are not designed for this
purpose.
5. If the mounting wall has exposed studs, installer must provide a
backer board to mount boiler. Boiler cannot be leveled without
a backing surface.
6. Mount the boiler on the wall following these instructions. e
boiler mounting bracket must engage with the wall-mount bracket.
Make sure the bracket is not just resting on the edge of the boiler
mounting bracket. Perform all procedures given in the Boiler
Manual on previous pages before mounting the boiler.

1. See Figure4.
2. Locate the studs — must be on 16-inch centers. See previous
page instructions if studs are not on 16-inch centers.
3. Place the wall-mount bracket (Figure 4, Item 2) on the wall,
using a level to align correctly.
4. Place the wall-mount bracket so the mounting slots are centered
over the studs.
5. Level the bracket and trace the outline of the screw slots with a pencil.
Figure4 Wall-mount bracket and studs
Figure5 Place boiler on wall-mount bracket

Part number 550-100-270/0122 11
ECO®Tec series 2 gas-fired water boiler – boiler manual


(continued)

e boiler is heavy, and requires two people to li and
place upright. Use caution not to drop the boiler or
cause bodily injury while liing and handling. Wear
non-slip gloves to prevent possibility of cuts from
sheet metal edges. Aer the boiler is removed from
the shipping carton, DO NOT allow the boiler to sit
on its bottom, before stand is installed. Doing so may
result in damage to the water pipes.
1. Carefully remove boiler from the styrofoam protective base and
set on back. Remove door from front of boiler by unfastening
latches on side of cabinet.
2. Remove four (4) 5/16” studs from oor stand hardware trim
bag. Install studs by hand in rivet nuts on bottom of boiler.
See Figure7.
3. Remove front access panel from pedestal assembly by sliding
it up.
4. Align holes in top of pedestal with studs on bottom of boiler.
Slide stand over studs. Remove 5/16” nuts from trim bag.
Install nuts on studs using ½” socket or wrench. Make sure
to align sides of pedestal with cabinet before tightening down
nuts. Do not overtighten.
5. Install the condensate trap assembly following instructions
on page57.
6. Aer conrming nuts are tightened, obtain assistance and li
the boiler into upright position.
7. Set boiler in place and level by adjusting leveling legs with
at head screwdriver.
Figure6 Boiler mounting bracket
Figure7 Pedestal oor stand assembly (front access
panel removed)
ejacketdoorcanbeleinplacewhenhandling
the boiler, but the boiler must ONLY be lied
by the bottom and rear of the sheet metal
housing — NOT by any pipe or plastic part.
3. Obtainassistancetolifttheboilerintoposition.
4. Li the boiler high enough that its mounting bracket
(Figure6, Item3) will be above the wall-mount bracket
(Figure5,page10, Item2).
5. Let the rear of the boiler slide against the wall bracket as
you lower the boiler into place.
6. Adjust the boiler properly until engaged with the wall
bracket and the boiler slips into the correct position.
7. When the brackets are engaged correctly, the bottom of
the boiler enclosure will be at or near the pencil line, or
tape, you applied in step 2.
When mounting the boiler, use the method
described on step 2, page10 to ensure the
boiler bracket and the wall bracket are properly
engaged. If not, the boiler could fall. Failure to
comply could result in severe personal injury,
death or substantial property damage.
8. Ensure boiler is level front-to-back.
Ensure boiler is NOT pitched downward with
the front of the boiler lower than the back of
the boiler. is can prevent condensate from
draining properly. Failure to comply could
result in severe personal injury, death or
substantial property damage.

Part number 550-100-270/0122
12
ECO®Tec series 2 gas-fired water boiler – boiler manual
DONOTinstallareliefvalvewithapressure
higher than 50 PSIG. This is the maximum
allowable relief valve setting for the boiler. Failure
to comply could prevent the relief valve from
operating as needed, resulting in possibility of
severe personal injury, death or substantial property
damage.
Usetwowrencheswhentighteninganypipe
connectiontotheboiler. Failure to prevent the
boiler pipes from turning could damage pipes or
heat exchanger, resulting in possible severe personal
injury, death or substantial property damage.

Pressure test the boiler before permanently attaching water or
gas piping or electrical supply.


1. Install the reducer bushings (150/199), reducing tees, and
close nipples, shipped loose with the boiler, located and
oriented as shown in Figure8,page13.
Boilers installed in locations with less than
the RECOMMENDED service clearances will
need to adjust piping layout to meet space
requirements.
2. Apply pipe dope to all ttings sparingly.
DONOTinstallthereliefvalveuntilafter
thehydrostatictest. Temporarily install a ¾"
pipe cap in the boiler top outlet pipe location as
directed in these instructions. e cap must be
removed aer the test.
Failure to comply with the above could prevent
the relief valve from operating as needed, resulting
in possibility of severe personal injury, death or
substantial property damage.
3. Install the pressure/temperature gauge to the reducing tee as
shown in Figure8,page13.


1. e following piping components (supplied by installer) are
required for the test conguration:
a. Two (2) shut-o valves (1" NPT on 80/110,
1¼" NPT on 150/199).
b. Two (2) close nipples (1" NPT on 80/110,
1¼" NPT on 150/199).
c. ¾" NPT pipe cap.
2. TEMPORARILY install a ¾" NPT pipe cap on the boiler
top outlet pipe. Aer the hydrostatic test, this cap must be
removed and the relief valve, tee and elbow must be installed.

1. See Figure9,page13 for use with the following instructions.
2. CLOSE the boiler drain valve (Item 11). Connect a hose to
fresh water supply and to the drain valve.
3. Place a bucket under the ends of the isolation valves (Item 9
and 10) to catch water drippings.
4. CLOSE isolation valve Item 10, then crack open the 3/4" cap
(Item 3a) slightly. Leave isolation valve Item 9 open.
5. Slowly open the boiler drain valve (Item 11) and fresh water
supply to ll boiler with water. e boiler and piping will ll
quickly because of the low water content.
6. When water begins to seep from 3/4" cap (Item 3a), tighten
the cap.
7. Continue lling until water ows from supply isolation valve
(Item 9), then close the valve.
8. e test pressure should be 1-1/2 times the pressure setting
of the relief valve to be installed on the boiler (45 psig for a
30-psig relief valve; 75 psig for a 50-psig relief valve). Open
boiler drain valve until desired pressure is achieved.
9. Hold at test pressure for 10 minutes.
Do not leave boiler unattended. A cold water ll
could expand and cause excessive pressure, resulting
in severe personal injury, death or substantial
property damage.
10. Make sure constant gauge pressure has been maintained
throughout test. Check for leaks. Repair if found.
Leaks must be repaired at once. Failure to
do so can damage boiler, resulting in substantial
property damage.
Do not use petroleum-based cleaning or sealing
compounds in boiler system. Gaskets and seals
in the system may be damaged. is can result in
substantial property damage.

1. Disconnect ll water hose from water source.
2. Drain boiler through drain valve (Item 11).
Use caution when releasing pressure from the boiler.
Rapid water ow could cause injury.
3. Remove hose aer draining.
4. Remove nipples and valves unless they will remain for use in
the system piping.
5. Remove cap and install relief valve, tee and elbow as specied
in the following WARNING.
6. If any internal leaks occurred, make sure all water has been
cleaned up and electronic components, including the boiler
control, is completely dry.
Remove cap from Air Elimination/Relief Valve
Connection Water Pipe (1a). Install the relief valve
in the ¾" elbow. See page49 or page52 to install
relief valve discharge piping. Failure to install the
boiler relief valve could result in severe personal
injury, death or substantial property damage.


Part number 550-100-270/0122 13
ECO®Tec series 2 gas-fired water boiler – boiler manual
1 Boiler Out (Supply) connection, (male, 1" NPT ).
1a Air Elimination/Relief Valve Connection Water Pipe, (male, 3/4" NPT) use for relief vale and air elimination.
2 Boiler In (Return) connection, (male, 1" NPT ).
3 Boiler relief valve, shipped loose with boiler — DONOTmountreliefvalveuntilAFTERhydrostatictesting.
3a TEMPORARILYONLY— Install a ¾" NPT cap in the Air Elimination/Relief Valve Connection Water Pipe.
ThisMUSTBEREMOVEDafterthetestandthereliefvalvemountedhere.
4 Pressure/temperature gauge, shipped loose with boiler.
5a Reducing tee, NPT, 1 " x 1 " x ¼" on 80/110, & 1 ¼" x 1 ¼" x ¼" on 150/199, shipped loose with boiler.
5b Reducing tee, NPT, 1 " x 1 " x ¾" on 80/110, & 1 ¼" x 1 ¼" x ¾" on 150/199, shipped loose with boiler.
7 Bushing, NPT, 1 ¼" x 1", shipped loose with boiler (150/199 only).
8 Nipple, NPT 1"x close on 80/110, & 1 ¼" x close on 150/199, by installer .
9 Isolation valve on supply connection, by installer (1"NPT on 80/110, 1¼" NPT on 150/199).
10 Isolation valve on return connection, by installer (1"NPT on 80/110, 1¼" NPT on 150/199).
11 ¾" NPT boiler drain valve, shipped loose with boiler — aer hydrostatic testing, move drain valve to lowest point on the return
piping if not already there.
12 Auto air vent, by installer.
13 Bushing, NPT 3/4", by installer.
14 Tee, NPT 3/4" x 3/4" x 3/4", shipped loose with boiler.
15 Street elbow, NPT 3/4"x 3/4", shipped loose with boiler.
 (continued)
Figure8 Install pipe ttings for relief valve and pressure/
temperature gauge — DONOT mountreliefvalve
untilAFTERhydrostatictesting (see legend below)
Figure9 Install piping components required
for hydrostatic test (see legend below)
ECO Tec-015
BoilerIn
BoilerOut
1
45a
Recommended but
not included
3a
2
11
1a
ECO Tec-015a
(150/199 only)
Recommended but
not included
88
11
910
77
(150/199 only)
5b
ECO Tec-015
1a
3
15
14
12
13
Recommended piping after
hydrostatic test

Part number 550-100-270/0122
14
ECO®Tec series 2 gas-fired water boiler – boiler manual


ECO Tec 80/110/150/199


ALLboilersmustbeconvertedfor
propaneoperation.
Convertinganexistingnaturalgas-red
boilerforpropane — For a boiler already
installed, you must turn o gas supply, turn
o power and allow boiler to cool before
proceeding. You must also completely test the
boiler aer conversion to adjust gas valve to
proper setting, verify performance, and start
up the boiler following instructions beginning
on page124 of this manual.
Verify propane gas venturi— See
Figure10,page15 LP gas venturi will have a
black label and will be clearly labeled “LP”.
Must change control settings to proper gas
type.
Failure to comply could result in severe
personal injury, death or substantial property
damage.
This conversion kit shall be installed by
a qualified service agency in accordance
with the manufacturer’s instructions and
all applicable codes and requirements of the
authority having jurisdiction. If the information
in these instructions are not followed exactly,
a fire, an explosion or production of carbon
monoxide may result causing property damage,
personal injury or loss of life. The qualified
service agency is responsible for the proper
installation of this kit. e installation is not
proper and complete until the operation of the
converted appliance is checked as specied in the
manufacturer’s instructions.
Natural Gas to Liqueed Petroleum (Propane)
conversion kits
ECO Tec80/110LPP/N510-811-415 NGtoPropaneGasConversionKitcontents:
Venturi - Liqueed Petroleum (Propane) Gas 1
Screw Pan Hd. T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3.53mm x 63.50 I.D. mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia. mm 1
Label Gas Conversion 1
Orice Gas Liqueed Petroleum (Propane) 80/110 ECO Tec 1
Instructions Conversion Nat to LP Gas 1
ECOTec150LPP/N 510-811-416 NG to Propane Gas Conversion Kit contents:
Venturi - Liqueed Petroleum (Propane) Gas 1
Screw Pan Hd. T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3.53mm x 63.50 I. D. mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia. mm 1
Label Gas Conversion 1
Orice Gas Liqueed Petroleum (Propane) 150/199 ECO Tec 1
Instructions Conversion Nat to LP Gas 1
ECOTec199LPP/N 510-811-417 NG to Propane Gas Conversion Kit contents:
Venturi - Liqueed Petroleum (Propane) Gas 1
Screw Pan Hd. T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3mm x 70mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia. mm 1
Label Gas Conversion 1
Orice Gas Liqueed Petroleum (Propane) 150/199 ECO Tec 1
Instructions Conversion Nat to LP Gas 1
• Follow all instructions in proper order.
• Do not tamper with venturi. DO NOT change or modify
venturi in any way.
• Dispose of an uninstalled venturi; do not leave in the
building.
• Caution – the gas supply shall be shut off prior to
disconnecting the electrical power, before proceeding
with the conversion.
• Whenever the venturi is removed, all gaskets must be
replaced with new gaskets.

Contact gas supplier to size pipes, tanks and 100% lockup gas
pressure regulator.

1. Adjust propane supply regulator provided by gas supplier
between the pressure listed below:
2. Pressure required at gas valve inlet pressure port:
a. Maximum: 14” (356 mm) w.c. with no ow (lockup).
b. Minimum gas pressure, with gas flowing (verify during
boiler startup, while boiler is at high re): 3½” (89mm) w.c.

Part number 550-100-270/0122 15
ECO®Tec series 2 gas-fired water boiler – boiler manual
Liqueed Petroleum (Propane) to Natural Gas
conversion kits
ECOTec80/110NGP/N 383-700-305 LP to Natural Gas Conversion Kit contents:
Venturi - Natural Gas 1
Screw Pan Hd T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3.53mm x 63.50 I.D. mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia.mm 1
Label Gas Conversion 1
Instructions Conversion LP to Natural Gas 1
ECOTec150NGP/N 383-700-306 LP to Natural Gas Conversion Kit contents:
Venturi - Natural Gas 1
Screw Pan Hd T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3.53mm x 63.50 I.D. mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia. mm 1
Label Gas Conversion 1
Instructions Conversion LP to Natural Gas 1
ECOTec199NGP/N 383-700-307 LP to Natural Gas Conversion Kit contents:
Venturi - Natural Gas 1
Screw Pan Hd T20 M4-.7x12mm w/Sq. Con. Lock Washer 3
Washer .64 I.D. x .93 O.D. Garlock 1
O-Ring 3mm x 70mm Black 1
Gasket 2-Lips EPDM Ring 50 Dia. mm 1
Label Gas Conversion 1
Instructions Conversion LP to Natural Gas 1
Figure10 Propane gas venturi label identication
(Black label)
Figure11 Natural gas venturi label identication
(White label)

1. Propane venturi will have a black label identifying venturi
part number. See Figure10 for correct part number.
2. Verify that the label on the propane venturi is correct for the
model size (see Figure10 below).
3. Shut o the gas supply prior to disconnecting the electrical
power, before proceeding with the conversion.
4. If the jacket front door was not already removed, remove it.
5. Locate the blower and venturi (see Figure12).
Boiler
Model PartNumber GasType VenturiØ
80/110 511-050-233 LPG 20
150 511-050-234 LPG 26
199 511-050-235 LPG 28
Boiler
Model
PartNumber Gas
Type
Venturi
Ø
80/110 511-050-230 NG 22
150 511-050-231 NG 26
199 511-050-232 NG 28
 (continued)
Figure12 Blower, gas valve, venturi assembly
LEGENDfor Figures 12, 13, 14, 15, 16 and 17
1 Air Silencer
2 Air silencer clip
3 Venturi
4 Blower
5 Gas valve
6 Gas pipe
7 Swivel nut
8 Fiber Washer
9 O-Ring
10 LP Orice
6. Gently open up the "U" part of the silencer clip and remove
from venturi / silencer assembly, see Figures 12 and 13.
14
2
73
6
5
Figure13 Air silencer removal
12
2
3

Part number 550-100-270/0122
16
ECO®Tec series 2 gas-fired water boiler – boiler manual
 (continued)
Figure14 Gas pipe swivel nut loosened for propane
conversion (silencer removed)
Figure15 Gas valve separated from venturi
(Note - ber washer location)
Usetwowrenches when loosening swivel nut at
venturi, using pipe wrench on gas pipe (Item 6)
to prevent the gas pipe connection from turning.
Failure to support the gas connection pipe to
prevent it from turning could damage gas line
components.

Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
7. Disconnect wire harness from gas valve.
8. Loosen swivel nut (Figure14, Item 7) on venturi-gas valve
connection (Item 6). See Figure14. Gently set gas valve aside.
9. Remove three (3) T20 Torx screws holding the venturi, (Item 3)
in place. Remove venturi, change o-ring (Item 9), change ber
washer (Item 8) and inspect blower surface. Discard old o-ring
and ber washer, see Figure16.
10. Install new propane venturi and o-ring from conversion kit.
11. Ensure o-ring (Item 9) is seated properly in groove on blower.
12. Insert three (3) new Torx screws from conversion kit to hold
venturi in place. Torque screws to no more than 23 inch-
pounds.
13. Install LP orice (Item 10) into venturi gas inlet, see Figure17.
14. Reassemble gas pipe with new ber washer(Item 8) from
conversion kit to the venturi connection, using two wrenches
to tighten swivel nut. Change silencer gasket (Item 130,
page165) and re-attach air silencer to venturi. See
Figure13,page15.
15. Replace silencer clip locking silencer to venturi. Ensure
silencer clip is seated on the silencer/venturi correctly.
Inspect the gas pipe tting connections on the gas
valve and new venturi (Item3, Figure17,page16).
Check the seal of the connections. Failure to
comply will cause a gas leak, resulting in severe
personal injury or death.
Figure17 Installing the new propane gas orice.
4
7
3
6
5
Figure16 Venturi removed from blower
78
3
9
57 8 10 3
85 7

Part number 550-100-270/0122 17
ECO®Tec series 2 gas-fired water boiler – boiler manual
Do not check for gas leaks with an open ame — use
bubble test. Failure to use bubble test or check for
gas leaks can cause severe personal injury, death or
substantial property damage.

1. Prior to the boiler’s rst ignition, adjust the throttle adjustment
screw (2.5mm Allen Head) by rst turning the screw clockwise
(P) until it bottoms out – do not apply any additional or excess
torque. Adjust the throttle screw in a counterclockwise (Q)
direction with precisely the number of turns listed in Table 2,
according to the boiler model/size.
2. Aer the throttle has been adjusted coarsely, the oset regulating
screw must be adjusted for the 80 and 110 models. Remove the
sealed, Allen (4mm)head cap protecting the oset regulating
screw before making adjustments. It is critical to be precise for
the adjustment of the oset regulating screw. DO NOT attempt
to bottom out the oset regulating screw as was done for the
throttle adjustment. Adjustments to the oset regulating screw
should be made from the factory-provided natural gas position.
Boiler
Model
ThrottleTurns
(CounterclockwiseQ from
Bottom-out Position)
O󰀨setTurns
(Counterclockwise Q
Factory NG Position )
80/110LP 6-3/4 1/8
150LP 10-3/4 0
199LP 13 0
Figure18 Gas valve adjustment locations—ONLY for use
by a qualied technician, using properly working,
calibrated combustion test instruments.
Figure19 O󰀨set regulating screw adjustment—(a)
Marking factory-provided NG position. (b)
View after turn CCW adjustment.
 (continued)
Adjust the offset regulating screw using the
following steps, referencing Figure19:
1. Aer removing cap, insert Allen wrench into oset hex
feature (4mm Allen Head) and mark position of wrench
on oset housing.
2. Turn the oset regulating screw counterclockwise (Q),
according to Table2, ensuring that the Allen wrench is
moved accordingly, as shown in Figure19b.
3. Reconnect wire harness to gas valve.
4. Restore electrical power, turn on gas by opening manual gas
valve and check for leaks and ensure all calls for heat & DHW
have been shut o.

1. When boiler has not been red, follow instructions on the
initial screens to select propane as the gas type and ensure all
calls for heat & DHW have been shut o. If natural gas was
already selected in the boiler control, the gas type parameter
will need to be adjusted. In the contractor menu, under the
Boiler Settings menu, adjust the “Fuel Type” setting to “
Propane”, see Figure95,page105.
2. Before ring, verify that the Boiler Settings are for LP gas,
“Max Rate” for the input (priority) used to re the boiler is
set between 96% and 100%. Also verify that the ‘Min Rate”
Table2 Course adjustment settings — Throttle and o󰀨set
adjustments to be made prior to rst ignition, by size.
Figure20 ECO Tec fuel type setting screen
O󰀨setRegulatingscrew
• Turn clockwise
to increase CO2. P
• Turn counter-clockwise to
decrease CO2. Q
Note: Must remove cover.
Throttle adjustmentscrew
• Turn counter-clockwise
to increase CO2. Q
• Turn clockwise to
decrease CO2. P
GasInletPressure
TestPort
BOILER SETTINGS
EDIT
FUEL TYPE: NATURAL GAS
ALTITUDE: 0-2000 FEET
TEMPERATURE UNITS: °F
WWSD TEMP: OFF
MANUAL RESET HIGH TEMP LIMIT: 200°F
DATE/TIME
HELP
FOR DETAILS ON ANY SELECTED LINE,
PRESS THE HELP BUTTON.

Part number 550-100-270/0122
18
ECO®Tec series 2 gas-fired water boiler – boiler manual
 (continued)

1. Aer installation is complete and boiler is set up for propane
gas, ll out and attach the propane conversion label next to
the boiler rating label (right side of cabinet).
2. Contractor/installer is responsible for completing the
information required on label (provided in kit) and attaching
installer conversion label next to the boiler rating label.

1. Follow the same instructions as LP conversion, except using
the correct Natural gas conversion kit, See page15 .
2. If LP gas was already selected in the boiler control, the gas
type parameter will need to be adjusted. In the contractor
menu, under the Boiler Settings menu, adjust the “Fuel
Type” setting to “Natural Gas”.
3. Turn throttle screw clockwise until it stops, and then turn
counter-clockwise number of turns per Figure22. Figure22
is intended to make rough adjustment to gas valve to allow
the boiler to re. ey are NOT intended to replace proper
adjustment of combustion valves per instructions on
pages124 and 125 of this manual.
4. Natural gas boilers do not require an orice between the
gas pipe and the venturi.
The door must be in place during
operation.DO NOT operate the boiler with
the jacket door removed except for inspection
and testing as directed in this manual.
BoilerModel NumberofTurns
80/110 NG 9-⅛
150 NG 12
199 NG 14-½
Figure21 Installer conversion label
Figure22 Throttle screw adjustment
is set to 10%. Adjust control settings if not at proper rate.
Verify that boiler is operating at the expected ring rate at
both high- and low-re during combustion analysis. Refer
to Figure119,page133 for proper low-re rate based on
altitude settings.
3. Prior to turning on the boiler, review the procedure and
control sequence for the operation of the Manual Test Mode
in the section of the Boiler Manual titled “Manual Test Mode”
starting on page134.
e use of a ue gas analyzer is required to convert
this unit and determine proper gas valve settings.
Do not perform this conversion without a ue gas
analyzer. Improper gas valve settings can cause
severe personal injury, death, or property damage.
4. Do NOT allow the boiler to modulate freely until the
combustion analysis and adjustment is complete. Turn
on and connect properly working, calibrated combustion
analyzer to the boiler ue pipe. Fire the boiler and force
it to High Fire in Manual Test Mode. Adjust the high re
combustion rst, using the throttle adjustment screw, to the
CO2and CO ranges specied in Figure114,page125, by
model size. en, force the boiler to Low Fire and adjust the
oset regulating screw to the CO2and CO ranges specied in
Figure114,page125, by model size. Reinstall the cap over the
oset adjustment screw. Follow the full startup instructions
found in this Boiler Manual including the section titled “Re-
check the Maximum and Minimum CO2and CO rate” on
page125.
5. e coarse adjustment prescribed by this manual should
result in combustion settings that allow for ignition and
are a starting point for further adjustment. If, aer making
the coarse adjustments prescribed above, the boiler will not
light, turn the throttle screw only counterclockwise (Q) an
additional 1/4 turn and attempt to light again. Repeat for a
total of up to one full turn. If, aer following the procedure
above, the boiler still will not ignite or, during combustion
analysis, the analyzer reads less than 1.0% O2,contact WM
Technologies Technical Services for assistance.
6. Check for gas leaks and conrming proper performance.

Perform complete start-up sequence (beginning on page119),
including check for gas leaks and checking for proper operation.
Aer placing the boiler in operation, the ignition system safety
shuto device must be tested, page125.

Install front door aer servicing. e front door
must be securely fastened to the boiler frame to
prevent boiler from drawing air from inside the
boiler room. This is particularly important if
the boiler is located in the same room as other
appliances. Failure to keep the door securely fastened
could result in severe personal injury or death.

Part number 550-100-270/0122 19
ECO®Tec series 2 gas-fired water boiler – boiler manual

Boiler gas connection is ½" NPT. Size gas lines large
enough to provide gas to all connected appliances.


1. Size gas piping from meter outlet to entrance of boiler in
accordance with Figure23 and Figure24.
2. Use total input of all connected appliances. Divide total input
in Btuh by 1,000 to obtain cubic feet per hour of natural gas.
a. Pipe lengths in Figure23 are equivalent length of straight
pipe. Convert pipe ttings to equivalent lengths using data
from Figure24.
b. Figure23 is only for natural gas with specic gravity 0.60,
with a pressure drop through the gas piping as listed in
the table.
c. For additional gas pipe sizing information, refer to ANSI
Z223.1 NFPA 54 – latest edition (or Natural Gas and
Propane Installation CAN/CSA B149.1 or B149.2 for
Canadian installations).

1. Pressure required at gas valve inlet pressure port, see
Figure113,page124:
a. Maximum: 14" (355 mm) w.c. with no ow (lockup).
Minimum gas pressure, with gas owing (verify during
boiler startup, while boiler is at high re):
ECO Tec 80: 3½" (89 mm) w.c.
ECO Tec 110: 3½" (89 mm) w.c.
ECO Tec 150/199: 3½" (89 mm) w.c.
b. Nominal gas pressure: 7.0" (178 mm) w.c.
2. Install 100% lockup gas pressure regulator in supply line if
inlet pressure can exceed 14" w.c. at any time. Adjust lockup
regulator for 14" w.c. maximum.

You must follow the instructions, beginning on
page14, to operate the boiler on propane. Failure to
comply could result in severe personal injury, death
or substantial property damage.

Contact gas supplier to size pipes, tanks and 100% lockup gas
pressure regulator.
Pipesize
inches
Equivalentlength,feet
90°Elbow Tee
short
radius
long
radius line ow
branch
ow
½3.6 2.2 1.7 4.2
¾4.4 2.3 2.4 5.3
15.2 2.7 3.2 6.6
1¼ 6.6 3.2 4.6 8.7
1½ 7.4 3.4 5.6 9.9
28.5 3.6 7.7 12.0
2½ 9.3 4.0 9.3 13.0
Gas
pipe
total
length,
feet
Capacity
Cubic feet per hour, natural gas, 0.60 specic gravity
Gas pressure 13" (330 mm) w.c. or less
Pressure drop 0.3 inches (7.6 mm) w.c.
½" ¾" 1" 1¼" 1½" 2" 2½"
10 132 278 520 1050 1600 3050 4800
20 92 190 350 730 1100 2100 3300
30 73 152 285 590 890 1650 2700
40 N/A 130 245 500 760 1450 2300
50 N/A 115 215 440 670 1270 2000
75 N/A 105 175 360 545 1020 1650
100 N/A 96 150 305 460 870 1400
150 N/A 90 120 250 380 710 1130

1. Adjust propane supply regulator provided by gas supplier for
14" (355 mm) w.c. maximum pressure.
2. Pressure required at gas valve inlet pressure port, see
Figure113,page124:
a. Maximum: 14" (355 mm) w.c. with no ow (lockup).
Minimum gas pressure, with gas owing (verify during
boiler startup, while boiler is at high re):
ECO Tec 80: 3½" (89 mm) w.c.
ECO Tec 110: 3½" (89 mm) w.c.
ECO Tec 150/199: 3½" (89 mm) w.c.
b. Nominal gas pressure: 11.0" (279 mm) w.c.
Figure23 Pipe capacity for 0.60 specic gravity natural
gas; pipe length is in equivalent feet.
Figure24 Equivalent lengths of straight pipe for typical
gas line ttings.

Part number 550-100-270/0122
20
ECO®Tec series 2 gas-fired water boiler – boiler manual


TheECO Tecboilercannotbecommonventedwithany
otherappliance. When an existing boiler is replaced with an ECO
Tec boiler, the ECO Tec boiler CANNOT use the existing common
vent. e boiler requires its own vent and air piping, as specied
in this manual. is may cause a problem for the appliances that
remain on the old common vent, because the vent may be too large.
e following test is intended to check for proper operation of the
appliances remaining on the old common vent system.

Perform the test sequence below for each appliance remaining on the
original common vent system. Operate each appliance individually,
with other appliances turned o. is procedure will test whether the
common vent system can properly vent each appliance.

(The followingis intendedto test whetherthe appliancesremaining
on an existing vent system will operate satisfactorily.)
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal
pitch and determine there is no blockage or restriction, leakage,
corrosion or other deciencies which could cause an unsafe
condition.
3. Test vent system — Insofar as is practical, close all building
doors and windows and all doors between the space in which the
appliances remaining connected to the common venting system
are located and other spaces of the building. Turn on clothes dryers
and any appliance not connected to the common venting system.
Turn on any exhaust fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not operate
a summer exhaust fan. Close replace dampers.
Any improper operation of a common venting system should be
corrected so the installation conforms with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 – latest edition, and/or the Natural Gas
and Propane Installation Code, CAN/CSA B149.1. When resizing any
portion of a common venting system, the common venting system
should be resized to approach the minimum size as determined using
the appropriate tables in Chapter 13 of the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 – latest edition, and/or the Natural Gas and
Propane Installation Code, CAN/CSA B149.1.
Do not install the ECO Tec boiler into a common
vent with any other appliance. is will cause ue
gas spillage or appliance malfunction, resulting in
possible severe personal injury, death or substantial
property damage.
Existing common vent systems may be too large for
the appliances remaining connected aer the existing
boiler is removed.
Failure to follow all instructions can result in ue gas
spillage and carbon monoxide emissions, causing
severe personal injury or death.
Use ONLY the venting materials and venting
manufacturers’ components and systems approved by
WM Technologies. Follow all instructions provided
by the venting component and system manufacturer.
Failure to do so can cause ue gas spillage and carbon
monoxide emissions, resulting in severe personal
injury or death.
Productstoavoid
Spray cans containing chloro/uorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents
found in household laundry rooms
Adhesives used to fasten building products and other
similar products
Excessive dust and dirt
Areaslikelytohavecontaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture renishing areas and establishments
New building construction
Remodeling areas
Garages with workshops

4. Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance
will operate continuously.
5. Test for spillage at dra hood relief opening aer 5 minutes
of main burner operation. Use the ame of a match or
candle, or smoke from a cigarette, cigar, or pipe.
6. Aer it has been determined that each appliance remaining
connected to the common venting system properly vents
when tested as outlined herein, return doors, windows,
exhaust fans, replace dampers, and any other gas-burning
appliance to their previous conditions of use.
Figure25 Corrosive contaminants and sources