Systems Installed
New, Trane Model RTWD
Series R™ water-cooled
chiller.
- Series R chillers are available from 80 to 250 tons at 60 Hz and 70 to 250 tons at 50 Hz.
- Meets ASHRAE 90.1-2007 efficiency guidelines
- Reduced refrigerant charge and efficiency improvements to help obtain LEED certification
- Can generate up to 140 F leaving condenser water temperature for heat recovery applications
- Reduced sensitivity to condenser water temperatures
- Can operate in variable primary flow applications
- Most units fit through standard single-width door. Fork lift channels built into base for better maneuverability
- Factory testing helps ensure trouble-free start-up
- Adaptive Control™ algorithms provide proactive unit control and safety functions
- Time-of-day scheduling options provide simplified unit level control
- Easily interfaces with building automation systems with BACnet, LonTalk and Tracer Summit™ systems
New Trane Model RTWD Series R chiller installed to provide reliable,
efficient air-conditioning at landmark church visitors center.
The Trane Model RTWA Series R™ chiller
installed at the Visitors Center in 1997 had
accumulated more than 40,000 hours of running
time—the equivalent of four and one-half years
of continuous operation. Although the chiller
continued to provide trouble-free operation, it
was decided to replace the chiller.
Larry Packer, Manager for the Facilities
Management Group at the LDS Mesa area, said,
“The old chiller was running fine but it was 10
years old and had a lot of running hours. We
were beginning to get concerned. We didn’t want
it to go down in the middle of the summer.”
Packer hired an HVAC consultant who had done
a great deal of work for the LDS Church. Packer
said, “He looked at a variety of suppliers but
favored Trane chillers and especially the new
Model RTWD helical-rotary chiller that was
going to be built in Pueblo, Colorado. Since that
chiller wasn’t yet available in 2008, we delayed
the replacement project about eight months
until that new chiller became available.”
The LDS Visitors Center received one of
the very first of the new Model RTWD
chillers to come out of Trane’s Pueblo
factory. The new chiller was shipped in late
February, 2009, and by the first week of
March it was up and running, providing
chilled water for the LDS Visitor’s Center.
Trent Hunt, Trane National Account Manager
for the LDS Church, says the new chiller offers
improved efficiency over the old Model RTWA
chiller—approximately 13 percent more efficient
for a projected energy cost savings of $2200
per year at the LDS Temple Visitors Center in
Mesa. The new RTWD version is also significantly
quieter than the old version..
Packer cited the compact size of the Model
RTWD chiller that makes it ideal for replacement
projects. “The installation process went very
well. Sunwest Mechanical installed the chiller. It
was very tight moving the new chiller into the
equipment room through the door. We had only
about one-half inch of clearance.”.
Jack Harris, Assistant Building Engineer, said,
“We’ve been real happy with the chiller. One
of our main concerns was noise because on the
other side of the equipment room is a theater
where we show films. You can put your ear right
up to that wall in the theater and not hear a
thing from the equipment room..
Harris also cited the fact that the Church
has a three-year service contract with
Trane that provides regular inspections
and maintenance of the new chiller. Says
Harris, “We’re real happy with this chiller
and the service we get from Trane.”
Trane
The Church of Jesus Christ of Latter Day Saints
Temple in Mesa was completed in 1927. The
Visitors Center, built in 1980, offers visitors
artwork, exhibits and dioramas throughout
the year—requiring an effective, efficient air
conditioning system to deal with Arizona’s
100-degree plus summer weather.