Case Study

self-contained unit, so, unlike a split
system, there were no refrigerant lines
to run and no outside compressor and
condenser coil to install and maintain.
All of that contributes to lower cost.”
Installation consisted of attaching
the CM25 to the ceiling; connecting
the intake and exhaust ducts; running
a drain line from the unit’s built-in
condensate pump to the P-trap of
a sink in an adjacent maintenance
closet; and wiring the unit to a 230-
volt electrical circuit.
e final installation step would
normally have been to attach the
CM25’s wall-mounted controller
thermostat, which provides compre-
hensive communications, monitoring
and self-diagnosis capabilities. Instead,
Steding wanted to control the CM25
from the company’s Alerton environ-
mental management system (EMS)
in the company’s headquarters. To ac-
complish this, he had Allina’s in-house
HVAC technicians install an Alerton
visual logic controller (VLC), which
they wired to the CM25’s control
board. Simply switching a DIP switch
on the board allowed them to interface
their EMS with the CM25 and take
over control of the unit.
“e flexibility of the CM25’s con-
trol options made it very easy for us
to integrate the unit into our automa-
tion system, which gives us remote
monitoring and enhanced control
capabilities,” Steding said. “e EMS
lets us build the control logic that fits
our needs. It allows us to monitor,
schedule, trend and alarm the points
we want, so we have greater control
over the unit.”
Steding plans to install additional
CM25s in other Allina clinics as the
need arises, whether for new installa-
tions or retrofits. “e CM25 has all
the features we need, at an affordable
price. Also, being able to connect it to
our control system so easily is a signifi-
cant benefit,” Steding said.
“The flexibility of the CM25’s
control options made it very
easy for us to integrate the unit
into our automation system, which
gives us remote monitoring and
enhanced control capabilities”
CASE STUDY
Building Control
System
Zone Control
Central HVAC
Power Supply
Flood and
Humidity Control
DDC
EMS
MovinCool
CM25
MovinCool's CM25 ceiling-mount
air conditioner features direct
analog and digital I/O, which are
conveniently integrated with an
energy management system (EMS).
DDC
EMS
CM25
Connection /
Bi-directional
Communication
Direct Digital Control /
Relay Contact
Switch Capability
Existing System
and Control in
the Building
Energy
Management
System
MovinCool
Ceiling-Mounted
Air Conditioning Unit
800-264-9573
www.movincool.com