System Overview Interior Zones - Price MFD Series Installation Manual

Modular Floor diFFusers
SYSTEM OVERVIEW
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 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 baskets are
controlled by the UMC3. The UMC3 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 UMC3 to modulate the actuators. Meanwhile,
the UMC3 accepts a 0 to 10 VDC cooling signal either from
a manual control signal or from a thermostat. The UMC3
modulates the airflow from 0% to 100%.
2 MODuLAr FLOOr DIFFuSerS - Manual | priceindustries.com
CoNsTaNT air VoluMe - CooliNG oNlY
VariaBle air VoluMe - CooliNG oNlY