A tekmar Boiler Control 268 regu-
lates a single water temperature through
outdoor temperature reset, as well as
staging and rotating the eight boilers
to properly match the building heating
demand.
Taco circulators on every boiler add
its heat input to one of the two, three-
inch boiler loops, which tee into a com-
mon four-inch supply via primary/sec-
ondary piping. This common supply
line is served by a Taco 4900 air and dirt
separator. Stub-outs were installed for
the possibility of adding DHW to the
boiler system in the future.
Each row of four boilers is served
by a 14-inch common exhaust vent,
which leads to the building's existing
chimney. Even if all the boilers are run-
ning, the mechanical room provided
adequate draft without needing to make
any changes.
A plAn comes together
"It's impressive how smoothly and
quickly it came together," said Plante.
"The boilers were fired about six weeks
after they were ordered. Demolition,
wiring, venting, piping, control setup; it
all went off without a glitch."
Because of the job's uniqueness—
from the multiple oil boiler approach,
to the varying types of heat distribu-
tion—its success was a team effort if
ever there was one. Bruce Crawford,
equipment and installation manager
for Petro, and Dave O'Driscoll, Petro's
installation field supervisor, put count-
less hours into planning and coordinat-
ing every facet of the project. Choosing
the correct install crew members and
subcontractors was key.
Both Stanton and Mike Morrissey,
sales representative for US Boiler, were
on-site to assist with the programming
of the controls and optional IQ cards;
the boilers were equipped with manu-
al-reset low-water cutoff and auxiliary
high-limit cards.
"For me, the rewarding part of
returning to the jobsite was comparing
the installation to the drawings I did,"
said Stanton. "Everything was identi-
cal to the diagrams, and the work was
impeccable."
Petro expects the monastery's fuel
savings to equal or exceed that seen
on other staged-MPO-IQ jobs they've
completed in apartment buildings;
roughly 45%. At a time when most
consumers are jumping on the gas
bandwagon, the Northeast's largest
heating service company is making
winning plays with oil.
38 JANUARY 2015 | FUEL OIL NEWS | www.fueloilnews.com
HVAC/ HYDRONICS
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