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SlimFit
Series 3
SlimFit Control — Advanced mode
SlimFit 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
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 are critical settings.
rectly 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 dam-
age in some applications.
Multi-temperature systems — If 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-temper-
ature circuits with limit controls that are wired to an
control external limit circuit. Failure to provide regulation can
result in substantial property damage.
SlimFit control overview
Basic Boiler Features:
•
Easy configuration 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.
•
Configure outputs to control System Pumps or 120 VAC Auxiliary
equipment.
•
System type presets simplify system temperature selection.
•
0-10VDC Input can modulate boiler firing 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 De-
mand feature.
•
BMS integration with standard MODBUS.
Multiple Boiler (Network) Features:
(see next page for explanation of Priorities)
•
Create a network of up to 8 boilers using built-in controls.
•
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 first and last boilers, up to 24
customizable inputs across boiler network (3 per unit, maximum
of 8 boilers on network).
Part number 550-100-569/0321
&
&
instructions beginning on page 9 for
Failure to set cor-
:
%
•
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 first or the last.
•
Three system modulation types—SERIES, PARALLEL,
AND SMART.
•
Three (3) Lead boiler rotation modes (plus OFF).
•
Limit the firing 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-
SlimFit
nection.
Additional Heat Demand Features:
•
Provides contact and modulating output to activate
other boilers or heating sources (a SlimFit boiler col-
laborating with a heat pump or a different boiler, for
examples).
SlimFit
•
Modulating output limited to 10VDC; 108μA.
•
Configure to operate additional heat demand function-
ality 1st (before SlimFit boiler) or 2nd (after SlimFit
boiler).
•
Select the response time that the primary source is al-
lowed to function before the additional heat demand
activates the secondary source.
•
Switch between 1st and 2nd based on a set outdoor
temperature for use in base loading applications.
•
Select if the additional heat source is activated based on
the system temperatures being monitored by the SlimFit
boiler (system temperature dependent YES).
SlimFit control operation
•
The control responds to signals from:
•
Room thermostats
•
DHW aquastats (if used)
•
Temperature sensors — boiler return, boiler supply,
flue 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
flow 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 are recommended to be used in all ap-
plication.
•
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 SlimFit control provides presets by System Type
(see Figure 24, page 45 for complete list).
Advanced Manual
– 3 –
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