Data Sheet for Product

Technical Specification Sheet
Document No. 149-1024
February 10, 2015
Document No. 149-1024 Page 1 of 6
Room Pressurization Controllers
Room Pressurization Controller—Electronic Output.
Room Pressurization Controller—Pneumatic Output.
The Room Pressurization Controllers provide high
performance Direct Digital Control (DDC) technology
for space pressurization and room temperature control.
Typical applications include hospital isolation rooms,
surgical suites, critical care and ancillary care areas,
labs with constant volume 2-position fume hoods,
areas surrounding laboratories or wherever (positive or
negative) pressurization of the room environment is
critical. The controllers maintain differential flow
between the supply and exhaust terminal boxes by
controlling the damper actuators on each terminal box.
Reheat is provided by control of a reheat valve.
The controllers offer two options for control devices.
The Room Pressurization Controller - Electronic
Output controls floating control valve and damper
actuators. The Room Pressurization Controller -
Pneumatic Output controls pneumatic valve and
damper actuators. The DDC can operate
independently, stand-alone or networked to perform
complex HVAC control, monitoring and energy
management functions. This extends the benefits of
DDC to all the building’s HVAC equipment.
Features
• Closed loop PID control of HVAC systems to
minimize offset and maintain tighter air volume
and temperature control.
• Dedicated control algorithms for specific
applications.
• Use of wall switch input to change from occupied
to unoccupied mode.
• Reports airflow in cfm (lps).
• Use of keyed switch to select pressurization mode:
protective isolation (positive), infectious isolation
(negative), no isolation.
• Separate minimum and maximum air volume
setting for heating and cooling modes (VAV)
applications only).
• Separate air volume setpoints for occupied and
unoccupied modes (CV applications only).
• HVAC diagnostics through communication with a
Portable Operator’s Terminal at a room sensor or
at any field panel.
• Setpoints and control parameters stored in
Electrically Erasable Programmable Read Only
Memory (EEPROM) no battery backup required.
• Returns from power failure without operator
intervention.
• Meets low duct static pressure requirements.
Applications
• VAV with Hot Water Reheat
• Constant Volume with Hot Water Reheat