EWC Controls Ultra-Zone UZC4 Technical Bulletin

The UZC4 Universal Zone Control System allows you to easily
upgrade an inefficient single zone HVAC system, into an
Automated, Multi-zone, Energy saving, Comfort producing,
Safety Minded, HVAC system. With Superior design, Intuitive
firmware, Building Code Compliant support, Simple setup
options, and Easy to understand wiring, the UZC4 Zoning
system is the Designer/Contractors dream. Combined with
Patented EWC motorized dampers and practically any Off-the-
shelf Conventional or Heat Pump style Thermostats,
EWC has set a New Industry Standard in Large
Residential and Commercial HVAC Air Zoning Systems.
The main module controls four air zones
Zone
using 24 vac motorized air dampers and
Capacity
may be expanded up to 22 zones, using
ZXM2 Expansion Modules.
Compatible The UZC4 will Control 2, 3 & 4 stage
Conventional, GeoThermal or Dual Fuel
HVAC
Heat pumps, without the need for dual
Systems
fuel kits. Also single or multi-stage Gas,
Oil, & Hydronic HVAC systems, with
single or two stage cooling and Constant
or Variable speed fan systems.
Compatible with most Off the shelf 1 or 2
Compatible
stage Conventional Heat/Cool or Heat
Thermostats
Pump Thermostats. All Mechanical,
Digital/Electronic, Dual Mode, and Internet
Compatible Thermostats that operate on
24vac. Battery powered or Power robbing
thermostats that draw less than 20 ma of
current are also compatible. Zone 1 will
accept One Zone Mode, Carbon Dioxide
Safety and Auxiliary/Dehumidify mode
inputs. See pages 9-11 & 14-17 for details.
Automatic The UZC4 Zone system features
automatic changeover from any
Heat/Cool
thermostat allowing for individual zone
Changeover
comfort from the HVAC system.
The STATUS LED pulses as a steady
Status LED
heart beat to indicate active Micro-
processor status.
On board Multi-colored LED's will
System LEDs
illuminate to indicate system status,
HVAC system mode, and active / inactive
zone identification.
Damper 1 thru Damper 22 green LEDs
Damper LEDs
will indicate which zone dampers are
demanded to energize Open or Closed.
Operating
INPUT VOLTAGE: 19-30VAC 60 Hz
Power Transformer 40-100VA MAX. NEC Class
2.
CURRENT DRAW: Max 22VA @ 24VAC.
OVER-CURRENT PROTECTION: 4.0
amp or 100VA.
TB-221
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
P/N 090375A0221 Revision S 09.04.12
Forced Air Zone Controls
See page 23.
See page 22 for details
©
Copyright 2004 EWC Controls Inc., All Rights Reserved
®

Model UZC4 Zone Control

Leave this bulletin on the job site for future reference!
J1
21
HVAC ZONE 14
CONTROl SYSTEM
7
OFF
STAGING
OAS
TIMER
R1
TB1
JMP1
FA
C1 C2
FA
24V
R
24V
C
D1 D2
LED19
RESET
TB2
GROUND FAULT
CB1
MXR
MXC
JMP2
F1
M6 D3
Z
M4
O
4
M2
N
M1
E
R5
D4
TB3
Z
M6
O
M4
3
N
M2 R6
D5
E
M1
TB4
M6
Z
M4 R7
O
D6
2
M2
N
M1
E
TB5
R8
M6 Z
D7
M4 O
1
M2 N
M1 E
R9
D8
TB6
O
M6
A
M4
D
M2 R10
M
D9
P
M1
R
TB7
M6
E
R11
M4
D10
B
M2
D
M1
A
TB8
R12
U
NC
D11
X
NO
R
C L
Y
R13
D12
TB9
H
G
V
Y2 R14
D13
A
Y1
C
O
B
R15
W1 S
D14
W2 Y
E S
RC T
R16
RH E
D15
M
R17
JMP3
D16
RH
RC
LINK
R18
E W C
CONTROLS INC.
Englishtown, NJ
Box Contents
Manual
and
Automatic
Thermal
Circuit
Breakers
.
Operating
Conditions
Indoor Fan
Control
140 26
43
28 40 46 130 150 19
120 160
35 37 49 12
110 170
42 5
34 52
COOLING 1ST STAGE MULTI STAGE
DIFFERENTIAL
LIMIT HEATING LIMIT
R2 R3 R4
C54 C53
D17 R23
D18 R24
R25
D19
D20 R26
D21 R27
D22 R28
BANK1
HP > SYSTEM > GAS
R29
DF < HP > CONV R50
R30
< >
OFF FAN PRG ON R31 R45
90 s < PURGE > 180 s R32
C3
OAS < STAGES > TMR
R33
OFF < 50 % R > ON R46
R34
OFF < SAS > ON R35
D23
GAS < FAN > HYDRO R36
BANK2
U2
> >
HC TSTAT HP R37
1 < CS# > 2 R38
O < RV > B
R39
< >
OFF ZDL ON R40
C4
< >
RA AUX RLY DA R41
R83
OFF < RAS > ON R42 U3
0 < > +10
RA LMT R43
< >
ANY FAN CTRL Z 1 R44
R85
C8 C5
U4 R87
U14 U15 C7
R47
C6
U5
R91
C16
R93
J2 U6
C18
R95
R48
U1
C17
C20
U7
Y1
R50
SW2
R99
SW1 C23
R58
U8
C21
R101
R51
TIMER CPU
RESET RESET R103
C24
U9
U19 U18 U17
R107
LED1
R109
STATUS
LED2
OAS LIMIT
R111
LED3
SAS LIMIT
LED4
RAS LIMIT
LED5
ZONE 4 OPEN
LED6
ZONE 3 OPEN
R115
LED7
ZONE 2 OPEN
LED8
ZONE 1 OPEN
R117
LED9
OA DMPR OPEN
LED10
R119
BYPASS DMPR
LED11
AUX RELAY
LED12
FAN
LED13
COMPRESSOR2
LED14
R123
COMPRESSOR1
LED15
REV VALVE
LED16 R125
W1 HEAT
LED17
W2 HEAT
R127
LED18
EMERGENCY
C52
R52 Z1 R129
R134 R135
R130
R53 R56
R133
R54 R57
R55 R60
R63 R61
* UZC4 Zone Control Panel
* Supply Air Sensor
* Technical Bulletin TB221
* Mounting Hardware
The main UZC4 module has a Manual
Reset circuit breaker with a Ground
Fault Indicator that protects all
connected modules and thermostat
circuitry. All modules have separate
damper motor Thermal Breakers too.
They protect the damper motor circuitry
from shorts in the field wiring. The
breakers will not protect against shorts
in the HVAC system wiring.
CAUTION:
When the thermal
breaker is tripped it will get quite
hot. To reset the breaker: Shut off
power to the panel. Find and repair
the short. Restore the 24VAC power.
TEMPERATURE: -20° to 160°F (-29° to 71°C)
HUMIDITY: 0% - 95% RH Non-Condensing.
The UZC4 allows constant operation of
the Indoor Fan by Thermostat #1 only, or
by each individual thermostat. When
controlled by thermostat #1, All Zone
dampers will respond. When controlled
individually, Zones not calling
continuous fan will close.
E-Mail- info@ewccontrols.com
UZC4
33
40
47
R64
HEAT
TB10
R65 S
SAS
R66 E
SAS
R67 C25
N
OAS
R68
S
R69 C26 OAS
O
R70
RAS
R
R71 C27
RAS
R72 S
R73
TB11
R74
C
R75
C28
W1
R76 T E
R77 C29 W2
S
R78
O
T
B
R79 C30
Y1
A
R80
Y2
T
R81
4 R
R82
G
C31
R84
C32
R86
TB12
C33
C
R88
W1 E
T
R89
W2
S
R90
O
T B
C34
Y1
A
R92
Y2
C35 T
R94 R
3
C36
G
R96
R97
R98
C37 TB13
R100 C
C38
W1 E
T
R102
W2
C39 S
O
R104 T B
Y1
A
R105
Y2
T
R106
R
2
C40
G
R108
C41
R110
C42
R112
TB14
R113
C
R114
W1 E
T
C43
W2
R116 S
C44 O
T B
R118
A Y1
C45
Y2
T
R120
R
1
R121
G
R122
C46
R124
C47 TB15
ONE
R126
ZONE
C48
AUX R
R128
CO 2
C49
CO 2
R130
C50
R132
C51
EMERGENCY
SW3
NORMAL
Figure 1.
for
1