Eco Tec Control Operation - Weil-McLain EcoTec 80 Manual

G -
®
ECO Tec
AS FIRED WATER BOILER

ECO Tec control operation

ECO Tec
Control inputs and outputs allow operation of multiple heating circuits
(space heating and DHW, for example).
Up to three priority levels can be set, providing automatic switch-over
on demand.
This manual provides quick set-up information for boiler installations.
ECO Tec
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.
The control automatically adjusts blower speed (and gas flow rate) to
match boiler output to space heating and/or DHW heating demand.
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
The Wizard leads through a step-by-step setup procedure designed for
the application chosen.
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
initial start-up or manually enter parameters using control menus
(see Figure 80, page 87 and following pages for information.)
2. See instructions beginning on page 78 for basic
systems and minimum settings required.
Failure to set correctly could result in severe personal injury, death or
substantial property damage.
— 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.
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
❏
Color touch-screen display for ease of operation monitoring and
troubleshooting.
❏
Three programmable priority assignments for up to four 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.
❏
Five (5) pump outputs, including 1 internal boiler circulator output.
❏
Additional heat demand operation to call a second heat source to help
supply the energy required for heating.
❏
Advanced PI response to anticipate system needs.
❏
Flue temperature modifier to target temperature.
❏
Modulation based on flue sensor, Boiler In/Boiler out, and DHW sensors.
72
–
WIZARD
— If the heating system includes circuits
B
80/110/150/199
Control sequence of operation
Check the boiler model listed on the power-up screen.
If it is not correct, turn off the boiler. See page 88 for
instructions to change setting.
When power is turned on, the screen lists sensors that
are detected. If any sensor is not listed, make sure it is
connected correctly. Turn off power and restart.
Standby - no calls for heat.
Toggles through no dots, 1 dot, 2 dots, then 3 dots
while in standby (wrench symbol will show instead if
maintenance is needed).
Call for heat detected.
Display on with BLUE banner (space heating) or
PURPLE banner (DHW).
Start min/max timers if more than one system is calling
- highest priority starts first.
Start circulators for this priority setup based upon
settings.
Calculate target temp — If sensor temp is below target
temp, begin firing sequence.
Blower to ignition speed for prepurge.
After prepurge times out, begin ignition cycle.
Activate gas valve and ignition spark.
Continue ignition spark for ignition period.
Turn off spark and use electrode to check for flame
signal.
Flame detected.
Release boiler to modulation.
NOTE: If flame is not detected, the gas valve is turned
off, blower turns on (postpurge), and control starts
cycle again. After 5 failures, the control waits 60
minutes, then tries again.
If priority timer times out, switch to next priority and
start priority timer.
If demand satisfied, go to postpurge.
Flame detected.
Release boiler to modulation.
NOTE: If flame is not detected, the gas valve is turned
off, blower turns on (postpurge), and control starts
cycle again. After 5 failures, the control waits 60
minutes, then tries again.
If priority timer times out, switch to next priority and
start priority timer.
If demand satisfied, go to postpurge.
Demand satisfied (temperature reaches target
temperature or limit setting).
Gas valve off.
Blower to ignition speed for postpurge.
Return to standby after purge.
Display banner turns BLUE, toggling between graphic
screen and maintenance screen (occurs if maintenance
schedule timer times out).
Will show during standby only.
Boiler operates as normal.
Display banner turns RED due to error or limit event.
Warm weather shut down - the boiler will not be
allowed to fire on space heating if the outdoor
temperature is greater than the WWSD setting.
DHW operation is not affected by WWSD.
M
OILER ANUAL
(also see Figure 76, page 76)
Part number 550-100-260/0520