Eco Tec Control - Overview - Weil-McLain Eco Tec 2 Series Advanced Manual

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ECO Tec series 2 gas-fired water boiler – advanced manual
ECO Tec Control — Overview
ECO Tec
y Control inputs and outputs allow operation of multiple heating circuits
(space heating and DHW, for example).
y Up to three priority levels can be set, providing automatic switch-over
on demand.
y This manual provides quick set-up information for boiler installations.
ECO Tec
y The control responds to signals from the room thermostats, DHW
aquastats (if used), boiler sensors (Boiler Out, Boiler In, flue temperature),
outdoor temperature and system sensors, if used. Combi models will also
respond to signals from DHW flow sensor and DHW temperature sensor.
y The control automatically adjusts blower speed to match boiler output to
space heating and/or DHW heating demand.
y The default control settings provides up to four (4) space heating zones.
The control can be easily set up for operation with a DHW zone, with or
without domestic priority.
ECO Tec
y The Wizard leads through a step-by-step setup procedure designed for
the application chosen.
y Context-sensitive help is available to explain the purpose of key setup Items.
ECO Tec
1. Set control parameters using the WIZARD option provided on ini-
tial start-up or manually enter parameters using control menus (see
Figure 26, page 56 and following pages for information.)
2. See Express setup instructions beginning on page 10 for basic
systems and minimum settings required.
Boiler Model, Altitude and Fuel Type are critical settings.
Failure to set correctly could result in severe personal injury, death or
substantial property damage.
Temperature settings — You must ensure that the control is set for the
proper water temperatures for the system. Excessive water temperature
can cause significant property damage in some applications.
Multi-temperature systems — I f the heating system includes circuits
that require lower temperature water (radiant slab circuits, for example)
as well as higher temperature circuits (DHW, finned tube baseboard, etc.),
it is recommended to protect low-temperature circuits with limit controls
that are wired to an control external limit circuit. Failure to provide
regulation can result in substantial property damage.
Control Features
Advanced interface and troubleshooting via Bluetooth
‰
communication.
Color touch-screen display for ease of operation monitoring and
‰
troubleshooting.
Easy configuration with WIZARD step-by-step setup including
‰
on-screen help.
The ECO Tec control can communicate to existing Unity
‰
in a multi-boiler network.
Three (3) programmable priority assignments for up to four (4)
‰
heat inputs.
Preset operating parameters for typical heating systems, including
‰
target temperatures, reset curves and circulator assignments.
Integral outdoor reset option, with reset curves matched to the
‰
system type selected.
ModBus communications for external communication and
‰
monitoring.
0-10VDC input modulation or remote target input.
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Part number 550-100-272/1021
control overview
control operation
control WIZARD
control setup
®
TM
Figure 1 Control sequence of operation
Display
status
text
y Check the boiler model listed on the power-up screen.
POWER
UP
y When power is turned on, the screen lists sensors that
y Standby - no calls for heat.
y Toggles through no dots, 1 dot, 2 dots, then 3 dots
Standby
y Call for heat detected.
y Display on with BLUE banner (space heating) or
y Start min/max timers if more than one system is call-
Blower y Start circulators for this priority setup based upon
ON
y Calculate target temp — If sensor temp is below target
y Blower to ignition speed for prepurge.
y After prepurge times out, begin ignition cycle.
y Activate gas valve and ignition spark.
y Continue ignition spark for ignition period.
Ignition
y Turn off spark and use electrode to check for flame
y Flame detected.
y Release boiler to modulation.
y NOTE: If flame is not detected, the gas valve is turned
Space
Heating
y If priority timer times out, switch to next priority and
y If demand satisfied, go to postpurge.
y Flame detected.
y Release boiler to modulation.
y NOTE: If flame is not detected, the gas valve is turned
DHW
Heating
y If priority timer times out, switch to next priority and
y If demand satisfied, go to postpurge.
y Demand satisfied (temperature reaches target tempera-
y Gas valve off.
Blower
y Blower to ignition speed for postpurge.
OFF
y Return to standby after purge.
y Display banner turns BLUE, toggling between graphic
controls
y Will show during standby only.
Maintenance
y Boiler operates as normal.
y Display banner turns RED due to error or limit event.
Error/fault
y Warm weather shut down - the boiler will not be
WWSD
y DHW operation is not affected by WWSD.
Control action
(Also see Figure 20, page 50)
If it is not correct, turn off the boiler. See page 59 for
instructions to change setting.
are detected. If any sensor is not listed, make sure it is
connected correctly. Turn off power and restart.
while in standby (wrench symbol will show instead if
maintenance is needed).
PURPLE banner (DHW).
ing - highest priority starts first.
settings.
temp, begin firing sequence.
signal.
off, blower turns on (postpurge), and control starts
cycle again. After 5 failures, the control waits 60
minutes, then tries again.
start priority timer.
off, blower turns on (postpurge), and control starts
cycle again. After 5 failures, the control waits 60
minutes, then tries again.
start priority timer.
ture or limit setting).
screen and maintenance screen (occurs if maintenance
schedule timer times out).
allowed to fire on space heating if the outdoor tem-
perature is greater than the WWSD setting.
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