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Evergreen
®
Control — Advanced mode
Evergreen
®
control overview
Basic Boiler Features:
• Easy confi guration with WIZARD step-by-step setup including
on-screen help.
• BASIC boiler settings mode for streamlined menu navigation of
essential settings.
• Three customizable input/output pairs—use as a 3-Zone control
or a 3-Priority control.
• Confi gure outputs to control System Pumps or 120 VAC Auxiliary
equipment.
• System type presets simplify system temperature selection.
• 0-10VDC Input can modulate boiler fi ring rate or target.
• Integral outdoor reset with warm weather shutdown.
Advanced Boiler Features:
• ADVANCED boiler settings mode unlocks all features and cus-
tomizable parameters.
• Manage multiple types of System Pumps or 120 VAC Auxiliary
accessories.
• Manage staged heating sources using the Additional Heat Demand
feature.
• BMS integration with standard MODBUS.
Evergreen
®
control setup
1. Set control parameters using the WIZARD option provided
on initial start-up or manually enter parameters using control
menus explained later in this manual.
2. See
Fast-Track setup
instructions beginning on page 9 for
example applications and minimum settings required (using
factory defaults).
3. This manual provides set-up information for a single-boiler
advanced settings and for all multiple boiler applications.
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 Evergreen
®
control is set for the proper water temperatures for the system.
Excessive water temperature can cause signifi cant property
damage in some applications.
Multi-temperature systems — If the heating system in-
cludes circuits that require lower temperature water (radiant
slab circuits, for example) as well as higher temperature circuits
(DHW, fi nned tube baseboard, etc.), it is recommended to protect
low-temperature circuits with limit controls that are wired to
an Evergreen
®
control external limit circuit. Failure to provide
regulation can result in substantial property damage.
Multiple Boiler (Network) Features:
(see next page for explanation of Priorities)
• Create a network of up to 8 boilers using built-in con-
trols.
• Master boiler controls the modulation and sequencing
of boilers on the network to achieve desired system
supply temperature.
• Use ALL boiler inputs, not just the fi rst and last boilers,
up to 24 customizable inputs across boiler network (3
per unit, maximum of 8 boilers on network).
• Two (2) available Network Priorities allow multiple
system types/temperature zones.
• Direct-connected DHW tanks (or other heating zones)
can be piped and wired locally to any boiler in the sys-
tem, not just the fi rst or the last.
• Three system modulation types—SERIES, PARALLEL,
AND SMART.
• Three (3) Lead boiler rotation modes (plus OFF).
• Limit the fi ring rate for each Network Priority indepen-
dently when heat demands are mismatched using the
Max System Rate parameter.
• Fire multiple boilers at initial call for heat to start up
quickly for high demand applications using the Mini-
mum Boilers parameter.
• Won’t interrupt a Local heat demand (such as direct-
connected DHW tank) to satisfy Network heat demand
unless all available boilers are at maximum input.
• Simple, 2-wire boiler-to-boiler communication con-
nection.
Evergreen
®
control operation
• The control responds to signals from:
• Room thermostats
• DHW aquastats (if used)
• Temperature sensors — boiler return, boiler supply,
fl ue temperature and, when used, system supply and
system return, outdoor temperature.
For optimal
performance, it is recommended to install the
system supply and return sensors.
• The control automatically adjusts blower speed (and gas
fl ow rate) to match boiler output to space heating and/
or DHW heating demand.
• The control provides three inputs and three outputs (for
circulators or auxiliary devices) plus a boiler circulator
output.
• Outdoor reset must be used in all applications that are
not exempt as described on page 2 .
• The outdoor temperature is used for supply tem-
perature reset operation and for the warm weather
shutdown (WWSD) option.
• See “Outdoor reset operation” on page 4 for com-
plete explanation of outdoor reset settings.
• System presets
• The Evergreen
®
control provides presets by system
type (see Figure 21, page 45 for complete list).
Part number 550-100-214/1220
– 3 –
CONDENSING GAS BOILER — 110/155 Advanced Manual
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