Building Operating Management September 2011 - FacilitiesNet

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buildingoperatingmanagement
SEPTEMBER 2011
c
a
d
b
ing comfort issues that are related to
sizing of equipment, or if there have
been any modifications to the store
which would require a review of the
systems, we generally replace with the
same tonnage,” he says.
Don’t forget to look ahead, as well.
“You should take into consideration
what the outlook is for future occupancy
of the building to determine what
the best approach is going to be,” Cogdill
says. “If you’re just trying to maintain
what you had before, well, did you
have a lot of redundancy before? Did
you need all that redundancy?”
e
Timing is Everything
The timing of an upgrade can go
a long way towards determining its
success or failure as well. While upgrading
HVAC equipment is never an
easy process, it’s certainly easier to do
it before something breaks.
❯❯a. MOVINCOOL CMW30 water-cooled, ceiling-mount air conditioner is 20 inches
high, allowing it to fi t above a drop ceiling. Cooling capacity is 29,400 BTU/hr (total) and
22,000 BTU/hr (sensible) for server rooms. Built-in mounting bracket, fl anges and vibration
isolators. The unit requires no external condensing unit, refrigerant connections or charging.
Uses R-410A refrigerant. MOVINCOOL: CIRCLE #235
❯❯b. TITUS EOS is a solar-powered diffuser that automatically adjusts to horizontal or
vertical confi guration. Logic system monitors air temperature and adjusts the air discharge
position using harvested power to complete auto-changeover function. Plenum slot diffuser
changes discharge pattern to the correct horizontal or vertical position for heating and
cooling applications. TITUS: CIRCLE #236
❯❯c. AERCO boiler line has been expanded to include 750MBH and 1,000MBH
models. Boilers are 24 inches deep by 28 inches wide by 79 inches high. The line has 20:1
turndown and NOx of less than 20 PPM. Features include stainless steel fi re tube heat
exchanger, remote monitoring and oxygen level monitoring. Operating range of 50 to 190 F.
AERCO: CIRCLE #237
❯❯d. BELL & GOSSETT submersible water pumps include a self-cleaning impeller
and casing designed for improved processing of solids, reduced clogging and improved
effi ciency. Designed for commercial and building services use. MK model has air-fi lled
motor and dual mechanical seal. MV model has vortex impeller and is designed for lowvolume
use. BELL & GOSSETT: CIRCLE #238
❯❯e. TESTO thermal imagers feature sensitivity of less than 80 millikelvin and measuring
range of -4 to 232 F. Most models include integrated digital camera and software that
blends thermal and digital images. All models include hard shell case, SD card, USB cable,
software, power supply and tripod mounting plate. TESTO: CIRCLE #239
❯❯ ATLAS SALES AND RENTAL provides portable cooling systems in 1- to 5-ton
sizes and mobile cooling systems in 12- and 25-ton sizes. Units available in both air- and
water-cooled confi gurations. Water-cooled units can be used with either cooling tower
or portable dry coolers and require no exhaust ducts. (Not pictured) ATLAS SALES AND
RENTAL: CIRCLE #256
HVAC efficiency
upgrades are an
easier sell when
combined with
other compelling
reasons
Nike found this out the hard way.
“We had a reactive plan in place when
it came to replacing HVAC equipment,
due to budget restrictions, and would
only replace the units after they had
failed and had no more life left in them
to be salvaged,” Beaudoin says. “After a
few difficult summers, where multiple
units had failed, causing major discomfort
and lost sales as consumers
left complaining of the temperatures,
leaders asked what we could do to
avoid these issues in the future.”
The result was a program that allows
for Beaudoin and his staff to replace
rooftop units at the stores before
they fail. It also allows them to replace
all of the units — usually five — at once.
“It allows us to bring the whole store
up to our new equipment brand standards,
with greater energy efficiency,
R410a refrigerants, and makes con-