Systems installed
• IntelliPak™ rooftop
unit with factoryinstalled
and -tested
LonTalk interface
provides 50+
information points in
open protocol and
10+ configuration
properties. Trane
protocol-agnostic
controls include
LonTalk, BACnet or
generic analog/
binary inputs for
reduced energy and
maintenance costs,
making interface to
interoperable control
systems a reality.
THE DELTA HOTEL REPLACED AN AGING ROOTOP UNIT WITH A NEW
TRANE INTELLIPAK II™ UNIT
In early 2009 a compressor failed in one of the twenty-plus-year-old rooftop air
conditioning units at the Delta Hotel in Fredericton. For Marty Jenkins, Chief Engineer
at Delta Hotel, the choices were to replace either the compressor or the entire
rooftop unit. Jenkins said, "If we simply replaced the compressor, then we''''d have
a new compressor in an old air conditioning unit."
Deciding when to replace an existing rooftop unit can be difficult. To help, Trane
offers an efficiency calculator that can quantify available energy savings when
replacing old units with new, more energy efficient equipment. Replacing units more
than fifteen years old can result in energy savings of twenty percent or more. Also,
as equipment ages and components wear, unplanned maintenance costs can increase.
New equipment refreshes the system, improves efficiency, allows planned maintenance
and minimizes nuisance and unplanned downtime.
Jenkins decided to completely replace the rooftop unit to take advantage of the
benefits associated with a new reliable unit. Trane recommended an IntelliPak II™
replacement rooftop unit that would fit the existing roof cub, minimizing installation
costs. In addition to improved efficiency, thanks to heat transfer and scroll compressor
technology advances, the new unit was selected with gas heat instead of electric
heat to take advantage of lower energy costs. The IntelliPak II is also available
with alternative refrigerant. Variable Air Volume (VAV) air distribution maximizes
indoor air quality and provides industry-leading performance at a lower total cost
of ownership. The unit also features double-wall construction, hinged access doors
and a pitched roof to control rain water run off, plus a wide variety of factory
installed options.
The new Trane replacement rooftop unit arrived in Fredericton at 10:30 a.m. on a
Friday. After removing the old unit and hoisting the new unit to the roof, securing
the ductwork, wiring, gas and other connections, the new unit was turned on. By
3:30 p.m. the same day, it was cooling the hotel lobby.
The unit was later connected to the hotel''''s existing building automation system
to provide monitoring and control. Now that the controls work is completed, Marty
Jenkins says, "We have nice, constant temperatures now. Previously our static air
pressure was out of control, but now we have good control over it. It is much easier
to monitor and control our systems now.”
Jenkins plans to replace another aging rooftop unit at the hotel before it fails
in service. He adds, "We get good support from Roger Drost and Robert Carvell at
Trane. All of the personnel at Trane are great to deal with."
Delta Hotels and Resorts is a leading Canadian hotel management company that operates
and franchises forty-five full-service city center and airport hotels and resorts
under the Delta brand. Widely regarded as Canada''''s "brand of choice" by guests and
owners, Delta also distinguishes itself as a responsible corporate citizen. Its
Corporate Social Responsibility platform, Delta Helps, includes a chain-wide commitment
to the communities it serves through a national partnership with Habitat for Humanity
Canada, participation in the Hotel Association of Canada Green Key Eco-Rating program,
and work with other various environmental initiatives and charitable groups.