EWC Controls Ultra-Zone UZC4 Page 1 Technical Bulletin Download

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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

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]

P/N 090375A0221 Revision S 09.04.12

FA
FA

24V
24V

TB1

R
C

JMP1

RESET

CB1

TB2

MXR
MXC
M6
M4
M2
M1

TB3

O
N

M6
M4
M2
M1

O
N

TB4

TB5

M6
M4
M2
M1

O
N

O
A

D
M
P
R

TB6

TB7

M6
M4
M2
M1

NC
NO

E
B
D

TB8

G
Y2
Y1
O
B
W1
W2
E
RC
RH

RC
LINK

H
V
A
C

S
Y
S
T
E

TB9

K10

K11

K12

K13

JMP3

K14

CONTROLS

INC.

Englishtown,

HVAC ZONE
CONTROl SYSTEM

UZC4

SAS
SAS
OAS
OAS
RAS
RAS

S
E
N
S

O
R

TB11

TB10

T
S
T
A
T
4

C
W1
W2
O
Y1
Y2
R
G

TB12

T
S
T
A
T
3

C
W1
W2
O
Y1
Y2
R
G

T
S
T
A
T
2

TB13

C
W1
W2
O
Y1
Y2
R
G

T
S
T
A
T
1

TB14

CO
CO

ONE

ZONE
AUX R

TB15

EMERGENCY

NORMAL

RAS

SAS

OAS

STATUS

LIMIT

ZONE

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

GAS

FAN

HYDRO

PURGE

180

OAS

STAGES

TMR

CONV

GAS

SYSTEM

OFF

FAN PRG

OFF

< AUX RLY>

ANY

< FAN CTRL>

OFF

< ZDL >

OFF

< RAS>

RA LMT

+10

> TSTAT>

< RV>

CS#

BANK1

BANK2

STAGING

TIMER

OAS

OFF

COOLING

LIMIT

1ST

LIMIT

STAGE

HEATING

DIFFERENTIAL

MULTI

STAGE

HEAT

120

110

130

140

150

160

170

JMP2

D10

R10

R11

D14

D13

D12

D11

R15

R12

R13

R14

D16

D15

R17

R16

R18

R63

R55

R53

R52

R54

R61

R60

R56

R57

C54

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

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

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

R74

R75

R76

R77

R78

R79

R88

R87

R86

R85

R84

R83

R82

R81

R80

C34

C35

C36

C16

C20

R98

R97

R96

R95

R93

R94

R92

R91

R90

R89

C39

C38

C37

C23

C24

R105

R104

R103

R102

R101

R100

R99

U15

U14

R47

C17

C21

SW2

SW1

R51

R50

R48

R58

C18

Figure 1.

LED19

GROUND FAULT

C53

INPUT VOLTAGE:

19-30VAC 60 Hz

Transformer 40-100VA MAX. NEC Class

CURRENT DRAW:

Max 22VA @ 24VAC.

OVER-CURRENT PROTECTION:

4.0

amp or 100VA.

Forced Air Zone Controls

Summary of Contents for Ultra-Zone UZC4

Page 1: ...ool 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 3...

Page 2: ...he SYSTEM RESET button for 5 seconds That will reset the Main Expansion modules on a UZC4 Zoning System NOTE A three minute startup delay occurs whenever the CPU Reset button is pushed upon any initial power up or when a power failure has occurred Timer Reset BUTTON CPU Reset BUTTON Emergency Heat Switch Supply Return Air Limit Delay Timer 3 minutes Fixed Opposite Mode Delay Timer A 20 minute dela...

Page 3: ...Alarm Interlock feature will over ride the CO2 Monitor feature AUXILARY or DeHUMIDIFY INTERFACE RELAY Enhanced Comfort Solution Auxiliary dry SPDT output This feature is affected by Heat Cool Operations Fire Alarm Activation Over rides this feature The UZC4 includes an Auxiliary Interface Input and SPDT action Dry Contact Output This allows the Installer to connect various Auxiliary controls such ...

Page 4: ...set points If the Return Air temperature is 80 degree F or below Stage Up is allowed 105 degree F or above Stage Down is forced Default 10 set points If the Return Air temperature is 90 degree F or below Stage Up is allowed 115 degree F or above Stage Down is forced RETURN AIR LIMITS DURING HEATING CYCLES FOR GAS OIL STRAIGHT ELECTRIC Default 0 set points If the Return Air temperature is 80 degree...

Page 5: ...tem being controlled the type of thermostats connected and the programmed staging sequence you desire As always you can still control a multi stage HVAC system using inexpensive single stage thermostats and sequence the staging by on board adjustable time delay or by using an optional outdoor air sensor OAS and sequence the staging via an outdoor air set point You can still control a state of the ...

Page 6: ...s to the correct and or desired positions will result in improper operation of the controlled HVAC System Please read and study the entire Technical Bulletin and if necessary Call the EWC Technical Support Hotline when assistance is required Leave this Technical Bulletin with the Home or Building Owner for future reference 6 EWC Controls Inc 385 Highway 33 Englishtown NJ 07726 800 446 3110 FAX 732...

Page 7: ... always over ride the Timer or OAS staging operations Unless the 50 rule has been enabled or the Return Air temperature limit has been exceeded NOTE4 Thermostatic demands to Stage Down will be honored unless the Timer is also in use NOTE5 Disable the Timer by setting to OFF and the UZC4 will obey Stage up Stage down demands via the thermostats only OAS STAGES TMR OFF 50 RULE ON Select OFF if you d...

Page 8: ...mber of zones rounded up must be calling for the same mode of operation or the UZC4 will not activate the HVAC system This feature only activates at 8 or more zones Select OFF if you do not want to utilize the Zone Demand Limiter feature NOTE Zone 1 is not affected by this feature Zone 1 demands are always honored ZDL example A zone system has 20 total zones and the ZDL feature is active At least ...

Page 9: ...ring Supply All of the preceding diagrams reflect conventional Non Heat Pump thermostats controlling conventional HVAC systems However the equipment being controlled does not have to be the conventional type A heat pump system can be controlled using conventional thermostats Figure 5 Figure 4 Model EWT 725 Configured for typical 2 stage Gas or Electric heating system with 1 stage cooling C W2 Y2 R...

Page 10: ... Thermostat instructions for further details Model EWT 955WH Wireless Thermostat Configured for 3 heat 2 cool heat pump See thermostat instructions for further details Model EWT 855i Configured for 3 heat 2 cool See thermostat instructions for further details Model EWT 725 Configured for 2 heat 1 cool heat pump See thermostat instructions for further details Field installed jumper Field installed ...

Page 11: ...TAT W1 E Y2 AUX R CO2 CO2 Wiring for typical 3 stage Heat 2 stage cool Heat Pump Diagram reflects De humidification terminal wired to the Auxilary input For auxilary output wiring see page 14 Auxilary Relay Dip Switch 5 Bank 2 should be set to Reverse Acting RA Refer to Dehumidify Operations on page 14 Wiring a split circuit thermostat to operate a Radiant floor heating or Baseboard heating Hydron...

Page 12: ...ontrol or Zone Valve or Pump Control Terminals Y C R Y G C TYPICAL FAN CENTER TERMINAL BLOCK OUTDOOR CONDENSING UNIT W W RC RH LINK RC RH LINK Cut Rc Rh Jumper Cut Rc Rh Jumper Note Your Air Handler may include a W terminal That means it may have it s own isolation circuit If you can confirm this simply connect the W1 terminal to the W terminal on the air handler Do not cut the Rc Rh jumper Wire u...

Page 13: ...efer to Mfr s data for specific equipment dip switch settings and logical program settings Set up the UZC4 to control the staging based on Time with single stage Conventional Thermostats Or you can install 3 stage Heat Pump Thermostats on all zones High Efficiency Heat Pump 3 or 4 Stage Heat and 2 Stage Cool Warning All of the wiring diagrams provided are general in nature and may not perfectly ma...

Page 14: ...control calls for Dehumidification the UZC4 will activate Y1 G and the Auxiliary Relay to signal the Air Handler to slow the fan down The UZC4 WILL ALSO e n e r g i z e t h e E Emergency output terminal to REHEAT the cold discharge air and Rapidly Dehumidify the home Energizing the E during this cycle prevents over cooling the home A common Customer complaint with the DeHumidify cycle in these HVA...

Page 15: ...trol the fan speed on most any variable speed air handlers or furnaces during cooling operations The UZC4 will lower the fan speed when 25 or less of the total zones are calling for cooling When this occurs the UZC4 will activate the Auxiliary relay output which will de energize the DS BK terminal on the Forced air unit resulting in the blower running at a lower speed NOTE 1 A jumper is required a...

Page 16: ...uxiliary Feature can be used to control Humidify Operations on any HVAC System Set the Auxiliary relay Dip Switch to Direct Acting and connect a dry contact Humidity Control to the R and AUX R terminals When the UZC4 detects a demand to Humidify it w i l l e n e r g i z e t h e Auxiliary Output Relay The Auxiliary relay contacts are dry so you can connect and control most any humidifier you want T...

Page 17: ... UZC4 to a separate CO2 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 CO2 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 CO2 Monitor reset...

Page 18: ... will shutdown the controlled HVAC system and force all connected dampers to t h e c l o s e d p o s i t i o n s effectively isolating the duct work and the Fan system This action will reduce the spread of smoke advancing through the building assisted by Fan and Duct systems that are not interlocked with a Fire Alarm system or equipped with the capability to do so The UZC4 has a set of dedicated t...

Page 19: ...SE DIAGRAMS PRIOR TO INSTALLATION AND POWER WIRING DOING SO WILL SAVE TIMEAND LABOR ON THE JOB SITE Patented Optical Damper Motor Actuators Figure 31 Figure 33 Figure 34 All Models SMDL BMDL Damper Wiring 2 4 1 M1 M2 M4 M6 All Models MA ND MA URD Damper Wiring 4 6 1 Patented Optical Damper Motor Actuators Figure 32 M1 M2 M4 M6 On all these dampers and most older style dampers including competitor ...

Page 20: ...block and allows a maximum 60va transformer to be connected This means that you can directly connect a theoretical maximum of 12 Genuine ND URD dampers to a single 2 zone expansion module Now you no longer have to isolate power up multiple dampers using field installed relays The Expansion modules provide the isolation for you See the diagram below for typical wiring solutions for dampers Separate...

Page 21: ... R8 D14 D13 D12 D11 R15 R12 R13 R14 D16 D15 R17 R16 R18 R63 R55 R53 R52 R54 R61 R60 Z1 R56 R57 R19 C2 C54 D2 R20 R21 R22 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...

Page 22: ...EN LED will illuminate solid to indicate that the Outside Air damper is energized open in response to the CO2 detector or other device to provide demand based ventilation BYPASS DMPR The BYPASS DMPR LED will illuminate solid to indicate that the Bypass damper s is being forced to the Open position Occurs during idle short cycle and changeover periods AUX RELAY The AUX RELAY LED will illuminate sol...

Page 23: ...Damper Motor Power Input Block The ZXM2 Expansion Module is powered via the Bus Cable from the UZC4 but the power for the dampers must be provided by a separate transformer and is isolated from the module This allows great freedom to connect as many dampers as the 2 5 amp thermal breaker can handle See page 19 for damper motor power supply details Make sure to read the ZXM2 Technical Bulletin for ...

Page 24: ... on the UZC4 and other ULTRA ZONE products When calling for Technical Support please have a multi meter pocket screwdriver and wire cutter stripper handy TECHNICAL SUPPORT LED s do not illuminate and HVAC system does not respond LED s are not responding properly and HVAC system is malfunctioning LED S are responding properly but HVAC system is malfunctioning SYMPTOM Disconnect the wire s from the ...

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