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INSTALLATION AND OPERATION INSTRUCTIONS
1-20
SL 30-175, SL 45-260 MODULATING GAS BOILERS
zone space heating conditions, a pressure activated bypass or other means of
bypass must be used on any load where the flow rate might drop below minimum
requirements (6 usgpm).
For further information and details, consult our
Application Notes
– which provide
detail on specific single and multiple boiler applications
“Piping”, “Wiring”
and
“Settings”. (available at www.ibcboiler.com or from your IBC Representative).
MULTIPLE bOILER PIPING - bENEFITS AND INSTALLATION RULES
Multiple iBC boilers can be installed in a single heating system to provide
redundancy, increased output, and greater heating plant turn-down capabilities.
Primary/secondary piping should be employed, with each boiler having its own
pump as illustrated above. This approach provides constant head and flow at
each boiler, regardless of flow variations in the main building loop.
NOTE
The piping drawings in this
manual are simple schematic
guides to a successful
installation. There are many
necessary components not
shown, and details such as
thermal traps are left out so
the drawings have greater
clarity. We require that
our boilers be installed by
licensed and experienced
trades people who are familiar
with the applicable local
and national codes. System
design is to be completed
by an experienced hydronic
designer or Engineer. It is
necessary to carefully read
and follow these installation
instructions along with the
application drawing that fits
your system.
Figure 25: Boilers rack mounted
Figure 24: Multiple boiler piping
4 STAGED BOILERS
SINGLE LOAD
SUPPLY TO
HEATING SYSTEM
SECONDARY LOOP SENSOR
(connect to Master boiler)
RETURN FROM
HEATING SYSTEM
Boiler #1
(Master)
Boiler #2
(Subordinate)
Boiler #3
(Subordinate)
Boiler #4
(Subordinate)
CAUTION: This drawing is a simple schematic guide to a successful installation. There
may be many necessary components not shown here. We require that our boilers be
installed by licensed and experienced trades people who are familiar with the applicable
local and national codes. System design is to be completed by an experienced hydronic
designer or Engineer. It is necessary to carefully read and follow the installation instructions
that come with the boiler along with the application drawing that fits your system.
IBC
SL 30-175
SL 45-260
BOILER
IBC
IBC
SL 30-175
SL 45-260
BOILER
IBC
IBC
SL 30-175
SL 45-260
BOILER
IBC
IBC
SL 30-175
SL 45-260
BOILER
IBC
Figure 23: Two pump, two load - parallel piping concept
DHW
FAN COIL
IBC
SL 30-175
SL 45-260
BOILER
IBC
PARALLEL PIPING CONCEPT
THIS EXAMPLE:
TWO LOAD, PARALLEL PUMPING
- BOTH PUMPS SWITCHED
DIRECTLY BY THE IBC CONTROL
Содержание SL 30-175
Страница 76: ...NOTES...