Weil-McLain ECO Tec 80-H Guide

User’s Information
Manual
Part number 550-100-271/1021
Series 2
80/110/150/199
Wall Mount Gas - Fired
Condensing Boilers – Combi and Heating Only Models
If the information in this manual is not followed exactly, a re or explosion may
result, causing property damage, personal injury or loss of life.
Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS —
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any telephone in your building.
• Immediately call your gas supplier from a neighbor’s telephone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the re department.
Installation & service must be performed by a qualified installer, service technician or the gas supplier.

Please read this page rst
Part number 550-100-271/1021
2
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Hazard denitions
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.
To . . . Read and use . . . Page
Learn
precautions See Hazard Denitions, below 2
Locate boiler
components See illustration at right 2
Prevent air
contamination
Laundry room or pool — make sure
boiler air is piped to boiler per manual.
Read list of air contaminants you must
avoid. Have boiler air re-piped to
another location if you can’t avoid.
4
Maintain
boiler
Set up a plan for maintaining the
boiler using the schedule included in this
manual.
Schedule an annual start-up by a
qualied service technician before every
heating season.
5
Start — or —
Shutdown
boiler
Follow the Operating instruction sheet
details to start or shutdown your boiler. 9
Understand
control
display
This page shows display screen modes
and menu access information. 10
This page shows how to access the
USER MENU to set date and time and
reset faults if the boiler enters LOCKOUT.
11-12
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.
When calling or writing about the boiler—
Please have the boiler model number from
the boiler rating label and the Consumer
Protection (CP) number from the boiler
cabinet.
Relief valve drain line (must be run to safe
drainage location — must be installed by a
qualied technician, per the boiler manual).
Control display
and buttons Relief valve
Boiler Out Boiler In
Air vent
ECO Tec Boiler components
Condensate trap and drain
line (drain line must be installed
by a qualied technician, per the
boiler manual).
Pressure/temperature
gauge
MANUAL GAS VALVE
DHW Inlet
Pipe
DHW Outlet
Pipe

STOP!! — Read before proceeding
Part number 550-100-271/1021 3
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Should overheating of boiler occur or gas supply fail to
shut o󰀨, DO NOT turn o or disconnect electrical supply to circula-
tor. Instead, shut o the gas supply at a location external to the appliance.
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 op-
erate the boiler until the boiler has been either
replaced or completely repaired, inspected,
and you are sure that the boiler and all compo-
nents 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 substan-
tial property damage. See the instructions at right.
Saltwater Damage — e 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 le behind can lead to longer term issues af-
ter the water is gone due to the conductive and corrosive
nature of the salt residue. Therefore, Weil-McLain equip-
ment 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, do not use this boiler. Immediately call
a qualied service technician to inspect the boiler and to replace
any part of the control system and any gas control that has been
in contact with water.
Failure to adhere to the guidelines on this page can result in severe personal
injury, death or substantial property damage.
Boiler service and maintenance —
• To avoid electric shock, interrupt electrical
supply before performing maintenance.
• To avoid severe burns, allow boiler to cool before perform-
ing maintenance.
• You must maintain the boiler as outlined in the manual and
have the boiler started up and serviced at least annu-
ally by a qualied service technician to ensure boiler/
system reliability.
Boiler operation —
• Do not block ow of combustion or ventilation air to boiler.
is boiler is equipped with a control which will automatically
shut down the boiler should air or vent be blocked. If vent or
air blockage is easily accessible and removable, remove it. e
boiler should attempt to restart within an hour. If blockage is
not obvious or cannot be removed, have the boiler and system
checked by a qualied service technician.
Combustion air —
• DO NOT obstruct the combustion air intake or
expose the air intake to corrosive chemicals (see
next page).
Carbon monoxide detector —
• A carbon monoxide detector that is wired on the same
electrical circuit as the boiler is strongly recommended.
Boiler water —
• Do not use petroleum-based cleaning or sealing compounds
in boiler system. Gaskets and seals in the system may be dam-
aged. is can result in substantial property damage.
• Leaks in boiler or piping must be repaired at once
to prevent make-up water. Use this boiler ONLY in
a closed-loop system. Continual fresh make-up water
will reduce boiler life. Mineral buildup in heat exchangers
reduces heat transfer, overheats the materials, and causes
failure. Addition of oxygen carried in by make-up water can
cause internal corrosion.
• Do not add cold water to hot boiler. ermal shock can
cause heat exchanger to crack.
Water chemistry
Water quality must be maintained as described in boiler manual.
Water pH between 7.0 and 8.5
• Maintain boiler water pH between 7.0 and 8.5. Check with
litmus paper or have chemically analyzed by water treatment
company.
• If pH diers from above, consult local water treatment com-
pany for treatment needed.
Hardness less than 7 grains
Consult local water treatment companies for unusually hard
water areas (above 7 grains hardness).
Chloride concentration must be LESS
THAN 50 ppm
• Filling with chlorinated fresh water should be acceptable since
drinking water chloride levels are typically less than 5 ppm.
• Do not use the boiler to directly heat swimming pool or spa
water.
• Do not ll boiler or operate with water containing chloride
in excess of 50 ppm.
Freeze protection uids —
• NEVER use automotive or standard glycol antifreeze. Use
only freeze-protection uids 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 Weil-McLain for use with this boiler.
See boiler manual 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.

Part number 550-100-271/1021
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ECO®Tec series 2 gas-fired water boiler – user’s information manual
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
Air contamination
Common household and hobby products oen contain
uorine or chlorine compounds. When these chemicals
pass through the boiler, they can form strong acids in
the vent system or boiler. e acid can eat through the
vent or boiler wall, causing serious damage and present-
ing a possible threat of ue gas spillage into the building.
Please read the information on this page.
If the boiler combustion air inlet is
located in any area likely to cause
contamination, or if products which
would contaminate the air cannot
be removed, you must have the
combustion air and vent re-piped
and terminated to another location.
Contaminated combustion air will dam-
age the boiler, resulting in possible severe
personal injury, death or substantial
property damage.
Do not operate the boiler if its com-
bustion air inlet is located in a laun-
dry room or pool facility, for example.
ese areas will always contain hazardous
contaminants.
Ensure that the combustion air will not contain any of
the contaminants in Figure 1.
Combustion air supply openings or intake terminations
must NOT be near a swimming pool, for example.
Avoid areas subject to exhaust fumes from laundry facili-
ties. ese areas will always contain contaminants.
Combustion air contamination:
Figure 1 Corrosive contaminants and sources
Prevent combustion air contamination

Part number 550-100-271/1021 5
ECO®Tec series 2 gas-fired water boiler – user’s information manual
OWNER MAINTENANCE (see the following pages for instructions)
BEGINNING OF SEASON
Contact your boiler service technician to inspect, service
and start up your boiler. You must have an annual start-up
performed by a qualied service technician to ensure reliable
operation of the boiler and system.
DAILY
• Check boiler area.
• Check air openings.
• Check pressure/temperature gauge.
• Verify boiler jacket door is securely closed.
MONTHLY
• Check vent piping.
• Check air piping.
• Check relief valve.
• Verify that domestic hot water is being supplied to xtures at the
correct temperature.
• Check condensate drain system.
• Check automatic air vents (if used).
• Check display date and time.
EVERY 6 MONTHS
• Check boiler piping (gas and water).
• Operate relief valve.
Follow the service and maintenance procedures given throughout this manual and in component literature
shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or
system. Failure to follow the directions in this manual and component literature could result in severe personal
injury, death or substantial property damage.
Figure 2 Service and maintenance schedules
Annual startup and general maintenance

DAILY
Maintenance
Boiler must
be serviced
and
maintained
Part number 550-100-271/1021
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ECO®Tec series 2 gas-fired water boiler – user’s information manual
Check boiler area
To prevent potential of severe per-
sonal injury, death or substantial
property damage, eliminate all
materials discussed below from
the boiler vicinity. If contaminants
are found:
Remove products immediately
from the area. If they have been
there for an extended period, call
a qualied service technician to
inspect the boiler and vent system
for possible damage from acid cor-
rosion.
If products cannot be removed, im-
mediately call a qualied service
technician to address the problem.
1. Combustible/ammable materials — Do not
store combustible materials, gasoline or any
other ammable vapors or liquids near the
boiler. Remove immediately if found.
2. Air contaminants — Products containing
chlorine or fluorine, if allowed to con-
taminate the boiler intake air, will cause
acidic condensate in the vent and boiler.
is will cause signicant damage to the vent
and/or boiler if allowed to continue.
3. Read the list of potential materials listed
on page 4 of this manual. If any of these
products are in the room from which the
boiler takes its combustion air, they must be
removed immediately or the boiler combus-
tion air must be supplied from outside.
4. See WARNING above.
Check air openings
1. Verify that combustion and ventilation air
openings to the boiler room and/or building
are open and unobstructed.
2. Verify that boiler vent discharge and air
intake are clean and free of obstructions.
Remove any debris on the air intake or ue
exhaust openings.
Check boiler pressure/
temperature gauge
1. Make sure the pressure reading on the boiler
pressure/temperature gauge does not exceed
24 psig. Higher pressure may indicate a
problem with the expansion tank.
2. Contact a qualified service technician if
problem persists.
Verify that boiler jacket
door is securely closed
Visually inspect boiler jacket door to be sure it
is sealed all around its perimeter. Verify that the
door latches are secure.
The boiler jacket door must be
securely fastened to the boiler
to prevent boiler from drawing
air from inside the boiler room.
Latches should be secure.
is 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.
Contact your installer or techni-
cian immediately if the front
door does not close correctly or
if the door gaskets are damaged.
e boiler should be inspected and started annually, at the beginning of the heating
season, only by a qualied service technician. In addition, the maintenance and care of
the boiler designated on page 5 and explained on the following pages must be performed
to assure maximum boiler eciency and reliability. Failure to service and maintain the
boiler and system could result in equipment failure, causing possible severe personal
injury, death or substantial property damage.
e following information provides detailed instructions for completing the mainte-
nance items listed in the maintenance schedule, page 5. In addition to this maintenance,
the boiler must be serviced and started up at the beginning of each heating season by
a qualied service technician.
User maintenance procedures

User maintenance procedures (continued)
Part number 550-100-271/1021 7
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Check display date and time
1. Observe the date and time shown below the
Weil-McLain logo on the control display
on page11.
2. If the date or time is incorrect, follow the
instructions in Figure8,page11 to access
the USER MENU and change the date and/
or time settings.
3. Keeping the date and time current makes
sure the control can record problems ac-
curately.
Ball oat
Contact a boiler service technician
immediately if you nd the trap
dry (no water inside).
Figure 3 Boiler condensate trap (front
access panel removed)
Figure 4 Automatic air vent
MONTHLY
Maintenance
Check vent & air piping
Visually inspect the ue gas vent piping and air piping for
any signs of blockage, leakage or deterioration of the pip-
ing. Notify your qualied service technician at once if you
nd any problem.
Failure to inspect the vent/air system as noted
above and have them repaired by a qualied
service technician can result in vent system
failure,causingseverepersonal injury ordeath.
Check the relief valve
1. Inspect the boiler relief valve and the relief valve dis-
charge pipe for signs of weeping or leakage.
2. If the relief valve oen weeps, the expansion tank may
not be working properly. Immediately contact your
qualied service technician to inspect the boiler and
system.
3. For Combi Boiler Models only: Inspect the Domestic
Hot Relief Valve and relief valve discharge pipe for signs
of weeping or leakage. If signs are present, contact your
qualied service technician.
Check the condensate drain system
1. Visually inspect the condensate drain tubing and the
end of the tube. Make sure the tube is in good condition
and that condensate can run freely.
2. Inspect the boiler condensate trap, located under the
boiler (see Figure3). Make sure the ball oat in the trap
is in place and appears to be free to move. Make sure
the trap has water in it.
3. Contact a boiler service technician if you observe any
problems.
Check DHW Temperatures
(Combi Only):
1. Check hot water temperatures at all xtures
2. Allow hot water to run for several minutes and ensure
water temperatures do not exceed 120°F. Temperatures
above 120°F can scald. See scald warning on page12.
3. e combi boiler’s thermostatic mixing valve and/or
other installed mixing valves may need adjustment.
Contact your qualied service technician if temperature
adjustments are needed.
Check automatic air vents (if used —
automatic air vents must be used with diaghragm-
type expansion tanks only)
1. See Figure4.
2. Remove the cap from any automatic air vent in the
system and check operation by depressing valve “B”
slightly with the tip of a screwdriver.
Scald hazard — Water from air vent may be
very hot. Avoid contact to prevent possible
severe personal injury.
3. If the air vent valve appears to be working freely and
not leaking, replace cap “A”, twisting all the way on.
4. Loosen cap “A” one turn to allow vent to operate.
5. Have vent replaced if it does not operate correctly.

User maintenance procedures (continued)
EVERY
6 MONTHS
Maintenance
Part number 550-100-271/1021
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ECO®Tec series 2 gas-fired water boiler – user’s information manual
Check boiler piping
1. Check all gas lines and smell for gas odors.
Perform gas leak inspection per steps 1
through 7, Operating Instructions, page9.
If gas odor or leak is detected, immediately
shut down boiler following procedures on
page9. Call a qualied service technician.
2. Visually inspect for water leaks around all
piping, circulators, relief valves and other
ttings.
3. Immediately call a qualied service techni-
cian to repair any leaks.
Have leaks xed at once by a quali-
ed service technician. Continual
fresh makeup water will reduce
boiler life. Minerals can build up
in the heat exchanger, reducing
heat transfer and causing over-
heating. Heat exchanger failure
can occur.
Do not use petroleum-based
cleaning or sealing com-
pounds in boiler system. Severe
damage to boiler and system
components can occur, resulting
in possible severe personal injury,
death or substantial property
damage.
Operate boiler relief valve
1. Before proceeding, verify that the relief valve
outlet has been piped to a safe place of dis-
charge, avoiding any possibility of scalding
from hot water.
2. Read the boiler pressure/temperature gauge
to make sure the system is pressurized.
Record pressure in system to refer to aer
checking relief valve.
3. Li the relief valve top lever slightly, allow-
ing water to relieve through the valve and
discharge piping.
4. If water ows freely, release the lever and
allow the valve to seat. Watch the end of the
relief valve discharge pipe to ensure that the
valve does not weep aer the line has had
time to drain. If the valve weeps, li the seat
again to attempt to clean the valve seat. If the
valve continues to weep aerwards, contact
your qualied service technician to inspect
the valve and system.
5. If water does not ow from the valve when
you li the lever completely, the valve or
discharge line may be blocked. Immediately
shutdown the boiler, following the lighting
instructions on the inside jacket top. Call
your qualied service technician to inspect
the boiler and system.
To avoid water damage or scalding
due to valve operation, a metal
discharge line must be connected
to relief valve outlet and run
to a safe place of disposal. is
discharge line must be installed
by a qualified heating installer
or service technician in accor-
dance with the instructions in the
ECO Tec Boiler Manual. The
discharge line must be terminated
so as to eliminate possibility of
severe burns should the valve
discharge.
6. Verify and compare boiler pressure returns
to recorded valve pressure before relief valve
was checked. If pressure does not return to
proper valve pressure, call a qualied service
technician.
Operate Domestic Hot Relief
Valve
1. Before proceeding, verify that the relief
valve outlet has been piped to a safe place
of discharge, avoiding any possibility of
scalding from hot water.
2. Li the relief valve top lever slightly, allow-
ing water to relieve through the valve and
discharge piping.
3. If water ows freely, release the lever and
allow the valve to seat. Watch the end of the
relief valve discharge pipe to ensure that the
valve does not weep aer the line has had
time to drain. If the valve weeps, li the seat
again to attempt to clean the valve seat. If the
valve continues to weep aerwards, contact
your qualied service technician to inspect
the valve and system.
4. If water does not ow from the valve when
you li the lever completely, the valve or
discharge line may be blocked. Immediately
shutdown the boiler, following the lighting
instructions on the inside jacket top. Call
your qualied service technician to inspect
the boiler and system.

OPERATING INSTRUCTIONS
Part number 550-100-271/1021 9
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Figure 5 Operating instructions (see page 2 for location of manual gas valve)

Navigation controls
Swipe: Slide nger left or right on the screen to navigate forward and backward on applicable screens.
Press: Touch icons on screen to perform specied action.
Scroll: Place nger on slide bar empty space and hold to scroll. Applicable screens can also be swiped up or down to scroll.
Double tap: Applicable on editable parameters. Allows user to enter edit mode by double tapping parameter.
Screens shown are typical only. Actual
screens depend on control settings chosen.
Part number 550-100-271/1021
10
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Figure 6 ECO Tec boiler control display states
The ECO Tec control display
Figure 7 ECO Tec boiler control display states
Status: Shows the current sequence of operation status with the active priority.
0-10v: Shows the current 0-10v input value from external device.
1-4: Shows inputs 1 through 4, what they are assigned to, their custom
names and their status.
Pumps/Aux: Shows which aux/pump outputs are currently active.
Additional
Heat Demand:
Shows whether AHD is o or on. Only appears if a priority is selected
to use AHD.
Outdoor Temp: Shows the current outdoor temperature sensor value. Only visible if
selected to use.
DHW Out/Flow: Shows current temperature and current ow rate of the Combi DHW
in GPM. Only visible for Combi models.
Supply/Return: Shows the current System Supply and System Return temperature.
Only visible if selected to use.
Boiler Out/In: Shows the current Boiler Out and Boiler In temperatures.
Target Temp: Shows the current Target Temperature of the active priority.
Modulation Rate: Shows the modulation rate of the boiler’s blower motor.

MAINTENANCE
EDIT
NAME: ECO TEC 110 COMBI
PHONE: [phone]
MODEL:ECO TEC 110 COMBI
CP: 1234567890
INSTALLED: 1/01/20
LAST DATE: 1/01/20
INTERVAL SET:12 MONTHS
LAST CALIBRATION: 1/01/20 12:00 PM
5/29/20
11:30AM
5/19/20
8:30AM
ECO TEC 110C
84°F
5/29/20
11:30AM
ECO TEC 110C
84
°F
LOW WATER CUTOFF
RESET
Screens shown are typical only. Actual
screens depend on control settings chosen.
Part number 550-100-271/1021 11
ECO®Tec series 2 gas-fired water boiler – user’s information manual
The ECO Tec control display (continued)
Resetting fault :
1. During a fault the status will change to LOCKOUT and the screen will look
like the display to the left. Low Water Cuto is used for this example.
2. The user will have to select reset on the screen.
3. Once selected the user will have to press the Reset button on the following
screen to reset the fault.
4. Call for service if fault continues.
The left maintenance screen can be accessed from the User Menu screen. Maintenance intervals should be set by a qualied technician
when the boiler is initially installed.
When maintenance is due, the main screen will display wrenches like in the right picture. When maintenance is due, please have a
qualied technician inspect the boiler. When maintenance reminder screen is displayed, you will be able to reset it to clear the reminder.
Figure 8 ECO Tec boiler control display USER Menu — (set date and time, reset faults).
Figure 9 ECO Tec boiler control display LOCKOUT SCREEN — screen turns red when boiler locks out —
highlight and select MANUAL RESET to reset boiler as shown below.
Figure 10 ECO Tec boiler control display Maintenance notice screens.
Date/Time: Allows user to edit the current date, time, and daylight savings time.
Backlight: Allows user to edit how bright the screen is during normal
operation and when dormant.
Clean: Locks the screen so nothing can be pressed for 10 seconds while
the user cleans the screen.
Software: Displays the current software revisions of the control and display.
Bluetooth®:Allows the user to turn Bluetooth ON or OFF. Swipe right from
HOME and press BLUETOOTH to reach FCC and IC information.
FCC: Wireless device unique identier registered with the U.S. Federal
Communications Commission.
IC: Wireless certication approval number unique to all devices,
required for Canada.
• 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.
Hot Water: FOR COMBI MODELS ONLY
Allows the user to edit the Hot Water Temp of the Combi demand,
as well as enable or disable Keep Hot mode or ECO BOOST mode.
Maintenance: Allows the user to view contractor and maintenance information,
as well as reset the maintenance reminder when present.
Settings: Allows the user to edit temperature units, screen time out, and
sound eect of presses.
2/28/20
9:45AM
MENU
DATE/TIME BACKLIGHT CLEAN SOFTWARE
HOT WATER MAINTENANCE SETTINGS NETWORK
BLUETOOTH
2/28/20
9:45AM
WIRELESS STATUS
BLUETOOTH STATUS
ON
BLUETOOTH
FCC: 2AC7Z-ESP32WROOM32E
IC: 21098-ESPWROOM32E
Assembled From
tested components
Complete system
not tested

Hot Water Can Scald!
• Water heated to temperature for clothes washing, dish washing and other sanitizing needs can scald and cause permanent injury.
• Children, elderly, and inrm or physically handicapped persons are more likely to be permanently injured by hot water.
Never leave them unattended in bathtub or shower. Never allow small children to use a hot water tap or draw their own bath.
• If anyone using hot water in the building ts the above description, or if state laws or local codes require certain water tem-
peratures at hot water taps, you must take special precautions:
• Use lowest possible temperature setting.
• Install a thermostatic protective device at each point of use in addition to the mixing valve installed at the water heater.
• Water passing out of drain valves may be extremely hot. To avoid injury:
• Make sure all connections are tight.
• Direct water ow away from any person.
For all applications:
Protection must be taken against excessive pressure on the Combi side!
Install a pressure relief valve (150 psig) on the Combi Domestic Outlet pipe.
ECO®Tec series 2 gas-fired water boiler – user’s information manual
Figure 11 ECO Tec boiler control display Homeowner Combi controls
The ECO Tec control display
MENU Item DESCRIPTION
The homeowner hot water screen can be accessed by going to the main
user menu and selecting the “Combi” option.
Hot Water Temp
• Set target temperature to the required Combi water
temperature for the application according to design with
mixing valve.
Combi Enabled
• Select whether to enable or disable Combi functionality.
• Disabling Combi functions will ignore DHW ow calls
for heat and only allow Central Heat on inputs 2 & 3 to
service calls for heat.
PREHEAT Mode
• Automatically maintains boiler water temperature to reduce
boiler reaction time on Combi domestic hot water (DHW)
draws.
• Select the mode of PREHEAT, between O, Economy and
High Performance.
ECO BOOST
• Reacts to homeowner use to recharge boiler water tem-
perature once, if needed to reduce boiler reaction time on
subsequent Combi domestic hot water (DHW) draws.
• Select whether or not to use the ECO BOOST feature. If
conditions are met, the burner will continue to re aer
Combi ow ends to recover temperature within the heat
exchanger.