4UNDERFLOOR MODUFLEX CONTROLLER - Manual |priceindustries.com
UNDERFLOOR MODUFLEX CONTROLLER
Product overview
Features of the UMC3
• Control up to 30 underfloor dampers.
• Modular connections to dampers – Use RJ-12 cables
included with dampers to connect underfloor dampers to
UMC3. LFGH dampers use RJ-45 connections.
• Outputs protected by self-resetting thermal fuses – Prevents
damage to circuit board in the event of a damaged cable.
Fault LED lights when dampers are trying to drive on an
output with damaged cable.
• Auxiliary 24VAC Binary Output – Use for reheat, room lights,
signal to other equipment, etc. Rated for a maximum output
of 0.5A (12VA).
• Auxilary Analog Outputs (2) – Use to connect to other
equipment, BAS, etc. Output range fully configurable (2-
10VDC, 0-10VDC, 10-2VDC, etc.). Rated at a maximum
output of 10mA each.
• Analog Inputs (2) – Configurable to allow control of the
UMC3 from a source other than a Price Thermostat (BAS,
third party thermostat, etc.). Accepts the standard dual
0-10VDC signal for cooling/heating. (if not using LFGH or
other heaters connected to UMC3, only the 0-10V cooling
signal is needed).
• Input (1) 10K type J thermistor – Can be used to monitor a
temperature over the network. Can also be used for heat/
cool changeover.
• Thermostat port - For RJ-45 connection to thermostat from
the UMC3 controller.
• Native BACnet MS/TP communication – Connect using RJ-
45 cable, or use discrete twisted-pair wire to terminal block.
Available speeds: 9600, 19200, 38400, 76800 (default).
• LED Indication – For ease of troubleshooting – displays
status, damper directions, BACnet status, and output fault.
• Pluggable terminal blocks – For easy installation.
• High-Voltage disconnect switch.
• 96 VA multi-tap transformer with circuit breaker.
• Metal safety guard separating high and low voltage areas.
• 8 grommeted openings for modular cable connections.
• Temperature sensor input (for monitoring).
• Disconnect switch.
• Pluggable 24VAC power terminal.
Operation
The UMC3 controller is an advanced and fully configurable
underfloor ModuFlex cooling controller. It is typically interfaced
with one of four Price Thermostats to determine room load and
allow for setup functions. With a variety of output configurations,
the UMC3 can control up to 30 underfloor dampers, as well as
auxiliary equipment using its auxiliary 24VAC binary outputs, and
analog 0-10V outputs.
Upon an increase in space temperature the controller regulates the
dampers open to increase the flow of cool air. On an increase
of space temperature greater than the proportional band,
the dampers’ positions are maintained at their pre-selected
maximum setting.
On a decrease in space temperature the controller regulates the
dampers closed to decrease the flow of cool air. If connected to
LFGH floor grills with integrated damper and reheat, the UMC3
will energize or modulate the heat proportionally to the room
demand. If the space temperature decreases to less than the
proportional band, the dampers’ positions are maintained at
their pre-selected minimum setting.
The UMC3 can also be configured to accept 0-10V input signals
from a BAS system or third party thermostat for room load
calculations, instead of data from the thermostat.
The UMC3 can be used as a stand alone unit, or can be
interfaced into a BAS with the MS/TP BACnet network.
The UMC3 offers four thermostat options that provide a range
of control from room temperature sensing, all the way to motion
sensing. With the use of the LCD Thermostat, balancing and
system setup can be achieved. Further, with the use of the LCD
Thermostat with Motion, the UMC3 can be used as a motion-
occupied zone and lighting controller. The LCD Thermostat with
Motion offers different levels of sensitivity and still performs all
the functions of the regular LCD Thermostat.
