EWC Controls Ultra-Zone UZC4, Технический бюллетень

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SYSTEM WIRING CONTINUED - Specialty Applications
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
This diagram reflects the UZC4 CO
2
terminals wired to the (NO) normally open contacts
of a third party device. The circuit is normally open and the contacts must close to
activate this feature. This feature operates regardless of all other functions except the
FIRE Mode interlock.
ZONE THERMOSTAT
#1
Commercial Grade
Thermostat
G
R Y
W2 W1 C
UNOCC / OCC
C
W2
Y1
R
G
O/B
ONE
ZONE
ZONE 1
T'STAT
W1/E
Y2
AUX R
CO
2
CO
2
CO
2
Monitor
Using the UZC4’s CO
2
Feature to satisfy Building Fresh Air Ventilation Codes The UZC4 features a CO
2
Monitoring interlock system
that will activate a Fresh Air
Damper and the indoor Fan
on the HVAC system in
response to a Separate CO
2
Monitor. This powerful
feature allows
Demand
Based Ventilation of a large
h o m e o r c o m m e r c i a l
building, based on the daily
occupancy levels.
Demand
Based Ventilation saves
energy, reduces over-
ventilation, and optimizes
air quality in the building.
Wire up the UZC4 to a
separate CO
2
Monitor with
auxilary dry contacts as
shown. Also install and wire
up a fresh air damper as
shown.
Set the PPM trip threshold on
the CO
2
Monitor per the
Mfr’s. Instructions or local
requirements.
Upon activation, the UZC4
will open the Fresh Air
Damper and Start the Indoor
Fan if it is not already
running. The UZC4 will
continue the ventilation
process, until the CO
2
M o n i t o r r e s e t s . O t h e r
devices can be connected to
the CO
2
terminals such as a
Clock Timer, Manual Switch
or Enthalpy Control.
NOTE: Cooling & Heating
operations are not affected
by activation of this feature.
NOTE: Activation of the Fire
Alarm Interlock Feature will
over-ride (shutdown) the
fresh air ventilation process.
NC
NO
C
A
U
X
R
L
Y
E
B
D
O
A
D
M
P
R
M1
M2
M4
M6
M6
M4
M2
M1
UZC4
MA-ESR
NC NO C M M
EWC Controls
Spring Return
Motor Actuator
This diagram reflects the UZC4 OA DMPR Output terminals wired to an UltraZone
Spring Closed type damper. When the UZC4 detects a Ventilation Demand, it will
energize the damper open and force the Indoor Fan to run. The UZC4 will stay in this
mode until the CO
2
Monitor detects an acceptable CO
2
level in the building.
This Damper Actuator is wired to
Power OPEN and Spring CLOSE
Power OPEN & Power CLOSE
dampers can also be used.
17
Figure 28.
Figure 27.
C
NC
NO