Brochure

9
Universal Zone Control Systems
The Ultra-Zone Model UZC is a 4 zone control panel that features
auto changeover between heating and cooling modes. The UZC will
accept the first call of heating or cooling and turn the system on and
close the dampers to the non-calling zones. If another zone calls for
the opposite mode, the UZC will hold that call until the first call is
satisfied or until a 20 minute timer has passed. Once accomplished,
the UZC will go through a time delay to purge the conditioned air
out of the system.
The purge time is the total time the fan will remain on with the last
calling dampers remaining open. This can be either 1
1/2
or 3 minutes
or turned off. The automatic changeover time is fixed at 4 minutes
including the purge time. At the end of this time the system will
activate the opposite mode of the HVAC system.
The UZC will control Single Stage 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 either single or two stage cooling and constant or variable
speed fan systems. Any and all of these systems can be controlled
with most any off the shelf thermostats.
The UZC allows for the use of any type of thermostat on any zone
with any type of HVAC equipment. This is done with a staging
timer built into the UZC. A field adjustable timer between 7 – 42
minutes will energize the staging up when necessary if zones are not
satisfying based upon the time set on the timer. This feature allows
the installer to use single stage thermostats with multi-stage equip-
ment, a very user friendly feature.
There are (2) two energy saving features that the UZC incorporates
that can save homeowners more than 40% on utility bills. The first is
our 50% rule. This feature will not allow staging up to occur if less
than 50% of the zones are in demand. This will prevent the HVAC
system from consuming unneeded energy. The second is using our
OAS sensor with the UZC to sense the outside air temperature and
also limit the staging up process if the temperature is too mild. The
OAS works with an adjustable setting between 7 and 42 degrees, if
the temperature is above the set point, again the UZC will prevent
the use of unneeded energy consumption.
The UZC also features (2) two safety controls built into the panel.
The first is its ability to have a “Fire Alarm Interlock”. If the UZC
is wired into the fire alarm system and a signal is detected the UZC
will shutdown the HVAC system and close all dampers. The sec-
ond safety feature is “Demand Based Ventilation”. This allows the
UZC to wire into a CO 2 monitor and control Fresh Air if needed.
If the UZC detects a signal from the Carbon Dioxide monitor the
panel will open all dampers, open the Fresh Air damper and turn the
HVAC fan on, helping to vent the building.
Other Industry setting features include:
Electronic Bypass Damper Interface
Achieves “Latent Cooling “and “Quiet Mode” start up
Adjustable Supply Air Sensor
Prevents over heating or cooling
Adjustable Heat Differential Potentiometer
Allows the SAS to be mounted in any location
One Zone Feature
Allows one thermostat to control multiple zones for set back
Computer Watchdog Circuitry
Prevents lock-ups from power failures and power interruptions.
Manual and Automatic Thermal Circuit Breakers
Protects the UZC from wiring shorts
Dehumidify or Humidify Interface
Auxiliary contacts to help increase comfort operations
Return Air Monitoring
Enhanced HVAC energy savings
Variable Speed Interface
Slows down fan speed if less than 25% of zones are calling
MODEL UZC-4
(up to 4 heat & 2 cool)
MODEL UZC (Revision 4)
MODEL ZXM-2
(Expansion Panel)
(maximum 20 zones)
For systems larger than 16 zones, call factory for pricing.
Product
UZC-4
UZC-6
UZC-8
UZC-10
UZC-12
List Price
$ 667.00
870.00
1,063.00
1,285.00
1,530.00
List Price
SAS Included
Product
UZC-14
UZC-16
SAS
OAS
ZXM-2
OAS-GT*
$ 1,799.00
2,055.00
52.00
52.00
270.00
52.00
*Geothermal Applications