EWC Controls Ultra-Zone UZC4 User Manual

G
R
W2
C
2 Heat 2 Cool
CONFIGURATION
W1
Y2 Y2
Y1Y1
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
SYSTEM WIRING CONTINUED - Specialty Applications
Using the UZC4’s Auxiliary Feature to control Humidify Operations
16
Variable or Constant Speed
FURNACE
with 1 or 2 stage HEAT
and
1 or 2 stage COOL
1 or 2 STAGE
CONDENSING
UNIT
UZC4
W2
W1
RH
RC
Y2
O
Y1
G
RC/RH
LINK
RC/RH
LINK
B
E
H
V
A
C
-
S
Y
S
T
E
M
Y1
C
R
Y2
NC
NO
C
A
U
X
R
L
Y
W1
Y1
C
R
W2
Y2
G
Wiring for typical 2 stage Heat,2 stage cool conventional HVAC System. Diagram
reflects Humidification terminal wired to the Auxiliary output (NO) Normally Open
terminal. Auxiliary Relay Dip Switch #5, Bank #2, should be set to Direct Acting. (DA)
C
W2
Y1
R
G
O/B
ONE
ZONE
ZONE 1
T'STAT
W1/E
Y2
AUX R
CO2
CO2
Wiring for typical 2 stage Heat,2 stage cool Conventional HVAC System. Diagram
reflects a Direct Acting Humidification control wired to the Auxiliary input. Auxiliary Relay
Dip Switch #5, Bank #2, should be set to Direct Acting. (DA) Refer to the Ultra-Zone
072000 Tech. Bulletin.
The Auxiliary 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
will energize the
Auxiliary Output Relay.
The Auxiliary relay
contacts are dry, so you
can connect and control
most any humidifier you
want.
These drawings show
an Ultra-Zone 072000
Smart
Humidistat connected to
the Auxiliary Input, and
an S2000/S2020 Steam
Humidifier connected to
the Auxiliary Output.
Refer to the Technical
Bulletins on the Ultra-
Zone S2000/S2020 and
the 072000 Smart
Humidistat for additional
details.
The UZC4 humidity
control logic allows a
Humidity demand to
occur at any time. There
is no need for a Heating
demand to occur first.
Bear this in mind when
field wiring your system.
You may have to
interlock your Humidifier
to run during a heating
call only! Steam
Humidifiers can run at
any time and do not
require a heating
demand to occur first.
NOTE: Humidify
operations can only be
achieved in (DA)
Direct acting mode.
OD OD C R H H
Ultra-Zone 072000 HUMIDISTAT
S2000/S2020 STEAM HUMIDIFIER
RG1 G2 H H
“R” WIRE MAY NOT
BE REQUIRED ON
YOUR CONDENSING
UNIT!
To OAS
Figure 25.
Figure 26.

EWC Controls Ultra-Zone UZC4 Specifications

General

Brand	EWC Controls
Model	Ultra-Zone UZC4
Category	Controller
Language	English