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PCM - INTERIOR AND PERIMETER ZONES COOLING AND HEATING - Manual
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PCM - INTERIOR AND PERIMETER ZONES COOLING AND HEATING - Manual
PCM - INTERIOR AND PERIMETER ZONES COOLING AND HEATINGPCM - INTERIOR AND PERIMETER ZONES COOLING AND HEATING
PRODUCT OVERVIEWProduct overview
Underfloor Systems Control Zones
INTERIOR ZONES
Constant Air Volume - Cooling Only
Typically, interior zones have relatively stable loads hence
constant volume supply is often employed. A typical interior
zone consists of contant volume or constant pressure turbulent
floor twist outlets installed in a large, common plenum space.
In this method the entire plenum space is treated as one zone
and, under fluctuating loads, the amount of air delivered to
the space is regulated by the relative pressure in this plenum,
modulated by a single point of control. Manual face-adjustable
diffusers (MFD) provide occupant control of airflow volume.
Variable Air Volume - Cooling Only
In the case an open plenum is desired to be divided into
several zones, variable air volume control is possible with the
use of devices installed under the diffuser or with the use of a
variable volume basket. The variable volume diffusers would
be controlled by the PCM. The PCM would open and close
the diffusers releasing air from the pressurized plenum. The
variable volume (VAV) diffusers require a 24 VAC signal which
is provided by the PCM to modulate the actuators. Meanwhile,
the PCM accepts a 0 to 10 VDC cooling signal either from
a manual control signal or from a thermostat. The PCM
modulates the airflow from 0% to 100%.
PERIMETER ZONE
Trough Heating and Cooling
Use of linear floor grilles with integrated heating elements offer
a system with heightened flexibility and efficiency as it omits
the use of fan terminal units and ducting. In cooling mode,
dampers on the LFGH modulate open to the plenum allowing
more airflow into the space to satisfy the cooling demand.
When a call for heat arises, the hot water or electric coil
energizes and the diffusers either open to the plenum or to a
perimeter cavity to allow air to pass over the heating element.
LFGHs are controlled by the PCM where up to 12 LFGHs can
be daisy chained.
TROUGH HEATING AND COOLING
General Description
The Power and Control Module (PCM) for interior and perimeter cooling and heating control is a direct digital controller for
pressurized underfloor plenum cooling zones. It can control up to 30 daisy chained underfloor damper/diffusers – 12 of which
can be perimeter units with integrated heat connected using plug-and-play CFLEX cables. Auxiliary inputs and outputs add to the
PCM’s flexibility.
The PCM offers cutting edge zone control by combining the accuracy of direct digital control with the flexibility of an individual zone
control system; providing maximum control and efficiency. An advanced and configurable proportional integral controller allows for
exceptional user comfort and energy efficiency. Installation of the controller and thermostat is simple and error proof with RJ-45
(network type) connections to the thermostat and BACnet network.
PCM comes as a rugged galvanized enclosure complete with a 100VA transformer and disconnect switch.
CONSTANT AIR VOLUME - COOLING ONLY
VARIABLE AIR VOLUME - COOLING ONLY
METAL SAFETY GUARD
SEPARATING HIGH AND
LOW VOLTAGE AREAS
100VA MULTI-TAP
TRANSFORMER WITH
CIRCUIT BREAKER
DISCONNECT SWITCH
4 GROMMETED
OPENINGS FOR MODULAR
CABLE CONNECTIONS
THERMISTOR INPUT
(MONITORING ONLY)
VOLTAGE TEST POINTS
RJ-45 T-STAT PORT FOR
THERMOSTAT CONNECTION
PLUGGABLE 24VAC
POWER TERMINAL
BACNET MS/TP CONNECTIONS
COMMON BINARY OUTPUTS
AUX
DAMPER CLOSED
DAMPER OPEN
BACNET MAC ADDRESS
LED INDICATORS FOR
TROUBLESHOOTING
ANALOG INPUTS
PIN 1 – COOLING
PIN 2 – HEATING
ANALOG OUTPUTS
HEAT
AUX
COM
LFGH OUTPUTS
CONNECT UP TO 6 LFGH UNITS
PER JACK FOR A TOTAL OF 12
LFGH UNITS
MODULAR DAMPER OUTPUTS
CONNECT UP TO 6 UNDERFLOOR
DAMPERS/DIFFUSERS PER JACK
FOR A TOTAL OF 30 DAMPERS/
DIFFUSERS (INCLUDING LFGH)
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