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
using 24 vac motorized air dampers and
may be expanded up to
22
zones, using
ZXM2 Expansion Modules.
See page 23.
The UZC4 will Control 2, 3 & 4 stage
Conventional, GeoThermal or Dual Fuel
Heat pumps,
without the need for dual
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
stage Conventional Heat/Cool or Heat
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.
The UZC4 Zone system features
automatic changeover from any
thermostat allowing for individual zone
comfort from the HVAC system.
The STATUS LED pulses as a steady
heart beat to indicate active Micro-
processor status.
On board Multi-colored LED’s will
illuminate to indicate system status,
HVAC system mode, and active / inactive
zone identification.
See page 22 for details
.
Damper 1 thru Damper 22 green LEDs
will indicate which zone dampers are
demanded to energize Open or Closed.
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 for
continuous fan will close.
Zone
Capacity
Compatible
HVAC
Systems
Compatible
Thermostats
Automatic
Heat/Cool
Changeover
Status LED
System LEDs
Damper LEDs
Operating
Power
Manual
and
Automatic
Thermal
Circuit
Breakers
Operating
Conditions
Indoor Fan
Control
Model UZC4 Zone Control
TB-221
Box Contents
* UZC4 Zone Control Panel
* Supply Air Sensor
* Technical Bulletin TB221
* Mounting Hardware
Leave this bulletin on the job site for future reference!
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- [email protected]
1
P/N 090375A0221 Revision S 09.04.12
Copyright
©
2004 EWC Controls Inc., All Rights Reserved
FA
FA
24V
24V
TB1
R
C
JMP1
C1
D1
RESET
CB1
F1
K1
TB2
MXR
MXC
M6
M4
M2
M1
TB3
4
Z
O
N
E
K2
M6
M4
M2
M1
2
3
M6
M4
M2
M1
Z
O
N
E
Z
O
N
E
TB4
TB5
K3
K4
M6
M4
M2
M1
M6
M4
M2
M1
Z
O
N
E
O
A
D
M
P
R
TB6
1
K5
TB7
K7
M6
M4
M2
M1
NC
NO
C
E
B
D
TB8
K8
K9
G
Y2
Y1
O
B
W1
W2
E
RC
RH
RC
LINK
RH
H
V
A
C
S
Y
S
T
E
M
TB9
K10
K11
K12
K13
JMP3
K14
C
W
E
CONTROLS
INC.
Englishtown,
NJ
HVAC ZONE
CONTROl SYSTEM
UZC4
SAS
SAS
OAS
OAS
RAS
RAS
S
E
N
S
O
R
S
TB11
TB10
T
S
T
A
T
4
C
W1
W2
O
Y1
Y2
R
G
B
E
C
W1
W2
O
Y1
Y2
R
G
B
E
TB12
T
S
T
A
T
3
C
W1
W2
O
Y1
Y2
R
G
B
E
T
S
T
A
T
2
TB13
C
W1
W2
O
Y1
Y2
R
G
B
E
T
S
T
A
T
1
TB14
CO
CO
ONE
ZONE
AUX R
TB15
2
2
EMERGENCY
NORMAL
RAS
SAS
OAS
STATUS
LIMIT
LIMIT
LIMIT
ZONE
ZONE
ZONE
ZONE
OPEN
OPEN
OPEN
OPEN
3
1
2
4
OPEN
OA DMPR
DMPR
BYPASS
AUX RELAY
FAN
COMPRESSOR1
COMPRESSOR2
EMERGENCY
W2 HEAT
VALVE
REV
W1 HEAT
LED12
LED13
LED14
LED15
LED16
LED17
LED9
LED10
LED18
LED2
LED3
LED11
LED4
LED1
LED6
LED5
LED7
LED8
RESET
CPU
TIMER
RESET
OFF
SAS
ON
<
>
GAS
FAN
HYDRO
<
>
90
PURGE
180
s
s
<
>
OAS
STAGES
TMR
<
>
DF
HP
CONV
<
>
HP
GAS
SYSTEM
>
>
OFF
FAN PRG
ON
<
>
OFF
R
%
50
ON
<
>
RA
< AUX RLY>
DA
ANY
< FAN CTRL>
Z
1
OFF
< ZDL >
ON
OFF
< RAS>
ON
0
RA LMT
+10
>
<
HC
HP
> TSTAT>
O
< RV>
B
1
2
CS#
>
<
BANK1
BANK2
R1
STAGING
TIMER
OAS
7
OFF
14
21
28
35
42
37
34
40
43
46
49
52
R2
COOLING
LIMIT
1ST
R3
LIMIT
STAGE
HEATING
DIFFERENTIAL
MULTI
STAGE
HEAT
R4
J1
120
110
130
140
150
160
170
12
19
26
33
40
47
5
D6
D5
D4
R7
R6
R5
D3
JMP2
D10
D7
D8
D9
R10
R11
R9
R8
D14
D13
D12
D11
R15
R12
R13
R14
D16
D15
R17
R16
R18
R63
R55
R53
R52
R54
R61
R60
Z1
R56
R57
R1
9
C2
C54
D2
R2
0
R2
1
R2
2
A
U
X
R
L
Y
C25
C26
C27
R65
R66
R67
R68
R71
R70
R69
R72
R73
R28
R27
R26
R25
R24
R23
D17
D18
D19
D20
D21
D22
R64
C48
C47
C46
C51
C50
C49
C52
SW3
R134
R128
R129
R130
R130
R132
R133
R135
R127
R126
R125
R124
R123
R122
U17
U18
U19
C42
C41
C40
C45
C44
C43
R121
R120
R119
R118
R117
R116
R115
R114
R113
R112
R111
R110
R109
R108
R107
R106
D23
C3
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
R42
R43
R44
R46
R45
R50
C28
C29
C30
C31
C32
C33
C5
C4
U2
U3
U4
R74
R75
R76
R77
R78
R79
R88
R87
R86
R85
R84
R83
R82
R81
R80
C34
C35
C36
C16
C6
C20
U6
U7
U5
R98
R97
R96
R95
R93
R94
R92
R91
R90
R89
C39
C38
C37
C23
C24
U8
U9
R105
R104
R103
R102
R101
R100
R99
J2
C8
C7
C1
0
C9
C1
1
C1
2
C1
3
C1
4
C1
5
U15
U14
R47
C17
C21
C2
2
C1
9
U1
Y1
SW2
SW1
R51
R50
R48
R4
9
R58
C18
Figure 1.
LED19
GROUND FAULT
C53
INPUT VOLTAGE:
19-30VAC 60 Hz
Transformer 40-100VA MAX. NEC Class
2.
CURRENT DRAW:
Max 22VA @ 24VAC.
OVER-CURRENT PROTECTION:
4.0
amp or 100VA.
Forced Air Zone Controls
®