User Guide

ZONE THERMOSTAT
#1
Commercial Grade Thermostat
G
RY
NO/NC
W1
C
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX [phone] E-Mail- [e-mail]
6
The UT3000 has built-in Delay Timers
that insure safe HVAC system operation.
When all Zones are satisfied, the
UT3000 will not resume the same call
for a minimum of 2 minutes.
At the end of a call, a 4 minute timer is
started and the UT3000 will not switch to
the opposite mode of system operation
until the timer has expired.
Built-In
Delay Timer
Settings
Short Cycle
Timer
Changeover
Timer
*Short Cycle Timer
*Changeover Timer
*Opposing System
Service Timer
2 minutes, fixed.
4 minutes, fixed.
20 minutes, fixed.
TIMER DEFINITIONS
Opposing
System
Service
Timer
A 20 minute delay must expire, or the
active zone(s) must satisfy, before
the UT3000 will honor a thermostat
demand to changeover to the
opposite mode of system operation.
*Start-up Delay Timer
1 minute, fixed.
Start-Up
Delay
Timer
Upon initial power up or after a power
failure, the UT3000 will not start the
equipment for at least 1 minute.
*Supply Air Limit Delay
3 minutes, fixed.
If a Heating or Cooling operation cycles
down due to excessive Supply Air
temperature, the UT3000 will not re-
start the HVAC system for 3 minutes.
Supply Air
Limit Timer
The UT3000 includes a SPDT Dry Relay
with an Input Trigger that can be used to
Connect, Interlock and Control various IAQ
devices. The Indoor Fan will operate
automatically, when the Dry Relay Input is
Triggered. All Connected Zone Dampers
still operate normally and are not affected
by the relay’s function.
Ancillary
IAQ
Dry Relay
Functions
The UT3000 includes the ONE ZONE
feature that allows a Commercial Grade
Thermostat or Time Clock to Force the
UT3000 into the ONE ZONE MODE during
Setback Periods. In compliance with
California Title 24, when the One Zone
Terminal is energized, the UT3000 ignores
all Zone T-stat demands except for Zone 1.
All Zone Dampers are Forced Open. When
the One Zone terminal is de-energized, the
UT3000 will resume Zoning Operations.
One Zone
Mode
Feature
R
C
DRY RELAY
SYSTEM
NC
NO
C
COMCOM POPO
PCPC
44
66
11
C
W/E
O/B
Y
R
G
Dry R
ONE
ZONE
ZONE
1
UT3000
UT3000
Ultra-Zone
Fresh Air
Damper
760ppm
Fresh Air IAQ Solution using a Field Supplied Co2 Monitor
Interlock and Operate a De-humidifier. The UT3000 will energize
the Indoor Blower to increase air movement thru the home
C
W/E
O/B
Y
R
G
Dry R
ONE
ZONE
ZONE
1
R
C
DRY RELAY
SYSTEM
NC
NO
C
UT3000
UT3000
The Following Diagrams reflect ways to Utilize the IAQ
Dry Relay and ONE ZONE Mode to your Advantage.
These and Other Customized Wiring Diagrams are
Available by contacting EWC® Controls.
For Clarity, other wire connections are not shown.
C
W/E
O/B
Y
R
G
Dry R
ONE
ZONE
ZONE
1
UT3000
Setback “One Zone” Solution using a Commercial Grade Thermostat.
If you prefer, you can use a Part # VAC Manual Vacation Switch. Call
EWC Controls for assistance with your Setback solution.
Whole House
De-Humidifier
WR
2273W-21
Direct Acting
Rh Control
Class 2
Low Voltage
wiring only
ACI
A/CO2
CO2
Sensor
Com
W2