Weil-McLain Eco Tec 2 Series Advanced Manual page 4

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ECO Tec series 2 gas-fired water boiler – advanced manual
ECO Tec Control
Control features continued
Up to four (4) configurable outputs, including one (1) internal
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boiler circulator output.
Additional heat demand operation to call a second heat source
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to help supply the energy required for heating.
Advanced PI response to anticipate system needs.
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Flue temperature modifier to target temperature.
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Modulation based on flue sensor, Boiler out, DHW Flow sensor
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and DHW sensors.
Dual temperature sensors on boiler outlet, DHW outlet and flue,
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providing redundant protection.
Boiler is shipped with an outdoor sensor.
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Blower speed modulation to control boiler firing rate.
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Alarm relay on error/fault for use with an audible safety.
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Optional PREHEAT mode – Automatically maintains boiler
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water temperature to reduce boiler reaction time on Combi
domestic hot water (DHW) draws.
Select the mode of PREHEAT, between Off, Economy and High
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Performance.
ECO BOOST – Reacts to homeowner use to recharge boiler water
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temperature 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
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conditions are met, the burner will continue to fire after Combi
flow ends to recover temperature within the heat exchanger.
Blower calibration – allows fine tuning of blower control to reach
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purge speeds faster, reducing time to heat delivery.
Temperature units – Select between using ° F or ° C.
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Manual Reset High Temperature Limits – Set High Limit
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temperature safety value.
Daylight Saving Time – Select whether your boiler will obey
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Daylight Savings Time for your region.
Multiple boiler operation
y The ECO Tec boiler has an auto detection feature for multiple
boiler networks. The Master will automatically detect the
presence of the other boilers wired to the network. (Feature
requires separate kit).
y There will be a 30 second to 1 minute period until the Master
may see the shadow boilers.
y Each shadow boiler must be assigned a network address, from
2 through 8. The address for each boiler must be unique, NOT
selected for any other boiler.
y Afterwards, the Master will build a network based on the
communications shared. If a boiler loses communication, the
Master will automatically re-assign the lost boiler to where it
was before once it is back on the network.
y When network inputs turn on, the Master boiler will enter the
Network Modulation routine.
y Three system modulation types—SERIES, PARALLEL, AND
SMART.
y Using system sensors, the Master will modulate the entire
network to meet the energy requirements of Network Priority
1 and Network Priority 2 inputs when they are on.
– 4 –
Overview
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(continued)
y When a Local Priority input becomes active (switch closes),
modulation for that input is not controlled by the Master, but
instead is left to that local boiler using its own local Boiler Inlet
and Outlet sensors.
y Each of the four (4) inputs (Input 2 and 3 for Combi models)
on the Master or any of the Shadow boilers can be assigned as
Network Priority 1 or 2 or assigned as Local Priority 1 or 2.
Network Priority settings are common across all the boilers.
These Network Priority settings can only be adjusted from the
Master boiler.
Sequence of operation
Figure 1, page 3 is a summary of the operating sequence for the
control.
y The statuses shown appear in the display as the control cycles
the boiler. See Figure 21, page 51 for screen shots.
y The display banner will be red if a problem has been detected.
ECO Tec
Control Priorities & Input/
Outputs
F or heating installations with multiple systems, the control uses
PRIORITIES to determine the order of operation of the systems.
y The control's MAX and MIN time settings determine the maxi-
mum and minimum times a system will be operated before
being turned off to allow another system to operate.
y A typical example is DHW priority — heat demand from the
DHW system is given preference over space heating, if set to
use Priority 1. (Combi DHW is defaulted to Priority 1 and
cannot be changed).
y The MAX ON TIME setting controls the maximum time a
priority will be allowed to run before switching to a lower
priority's call for heat.
y The MIN ON TIME setting controls the minimum time a
priority will be operated before switching to a higher priority's
call for heat, or the next lower priority.
y Each PRIORITY has its own set of operating parameters.
y The control prompts the user to select the system type (finned
tube baseboard, DHW, etc.) and is factory programmed with
parameters suited to each of these system types.
y The user can also choose CUSTOM to create a system type.
y The 120VAC power output to the boiler circulator is provided
by the boiler's control board.
y The ECO Tec control provides up to three (3) priorities for
single boiler applications and up to four priorities for network
boiler applications. The order of operation is:
y Single boilers: PRIORITY 1, PRIORITY 2, PRIORITY 3.
y Network boilers: LOCAL PRIORITY 1, NETWORK PRIOR-
ITY 1, NETWORK PRIORITY 2, LOCAL PRIORITY 2.
y For each boiler in a network, this provides up to two (2) local
priorities, used for heating systems piped directly to the boiler,
such as DHW tanks.
y Network priorities are used for heating systems connected in
the primary heating loop and supplied by the boiler network.
Part number 550-100-272/1021