ASHRAE Journal - July 2013 - 98

Sustainable Products Capabilities Advertising Section
Mixed Boiler Plants For Optimum Efﬁciency
Multiple boiler plants offer many advantages over single boiler
units, including redundancy, load matching, and energy savings.
With modern control methods, it is now possible to design
these plants with a mixture of condensing and non-condensing
boilers. This type of ‘mix and match’ heating plant can provide
economical efﬁciency by staging the boilers to respect their
ideal operating conditions. Without the right control you might
have redundancy – but will you have efﬁciency?
A heating plant that is blended with condensing and
non-condensing boilers has the ability to
maximize your system efﬁciency while
minimizing your capital investment. At
low supply temperatures, condensing
boilers will achieve their rated efﬁciencies.
At elevated temperatures, however, the
condensing operation is never allowed to
occur. Therefore, in the heart of the heating
season when supply temperatures are high,
that expensive boiler achieves no additional
performance over its non-condensing
counterpart.
The tekmar® Boiler Control 284 is able
to sequence the boilers for maximum
efﬁciency, and modulate them according
to demand. Condensing boilers can be
conﬁgured to always operate ﬁrst, or
the control can determine the optimum
conditions to stage each boiler type. The
control will evaluate the boiler target
temperature, and if it is lower than the
boiler minimum, the condensing boilers
will be sequenced ﬁrst to take advantage of
their higher efﬁciencies. If the calculated
supply temperature is above the boiler
minimum, the non-condensing boilers will
be sequenced ﬁrst in an effort to equalize
the run-times of the heating plant. The
tekmar® Boiler Control 284 also allows
you to conﬁgure a ﬁxed lead and a ﬁxed
last boiler, to further customize your
sequencing strategy. Imagine the capability
of responding to a variety of different heat
demands with a staging and modulation
response that is tailored to the present
conditions. That is what the tekmar® Boiler
Control 284 can achieve for your unique
system.

capability to an energy management system through BACnetIP®
or Modbus® protocols. For further remote monitoring, a tekmar®
Gateway 483 can be added to view the latest system information
from any web browser. Being informed of detailed performance
indicators allows building managers to remain in control of their
heating system from any location, at any hour of day. Ensuring
the reliability and efﬁciency of multiple, mixed boiler plants
with remote monitoring and adjustment options is how the
tekmar® Boiler Control 284 features the better design, with the
better control, for a better system.

Monitor the Performance of Your Boiler
Plant
Monitoring the operation of your heating
plant is an effective way to save money, time
and frustration. The tekmar® Boiler Control
284 can provide monitoring and adjustment
98

ASHRAE Journal

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July 2013
ASHRAE Journal - July 2013

Table of Contents for the Digital Edition of ASHRAE Journal - July 2013
