Page 10 ZC-KI6_VSS1709
the main area of the building (living
area).
Additional zones act as slaves to the
primary zone. The primary zone must
call for heating or cooling at least
once (a short, 5 second call is
adequate) at the beginning of the
season to tell the Zone Comfort air
handler that it is in heating mode or
cooling mode. The switch on the
primary thermostat is not enough!
Until this happens, a call on zone two,
three or four is ignored.
Off
All zone dampers are open if there is no
call for heating or cooling or power is off.
Heating
When a thermostat calls for heating, the
internal pump starts and the boiler is
activated (if connected to TT). The zone
damper for any zone not requiring heat
closes. The fan will gradually ramp up to
the programmed speed for the given
zone.
Cooling
When a thermostat calls for cooling, the
outdoor air conditioning (AC) condenser
is activated. The zone damper for any
zone not requiring cooling closes. Fan
speed can be controlled based on
number of zones calling and their
programmed cooling loads, or on
measured supply air temperature. Two-
stage air conditioners are strongly
recommended as a means of
improving efficiency, lowering fan
speed for single zone calls and more
closely matching AC output to the
home’s cooling requirements.
Continuous Fan
When the thermostat fan switch for the
primary zone is set to continuous fan, the
fan will run at the set speed for all zones.
When there is a call for heating or
cooling, the normal heating or cooling
speed will over-ride the continuous fan
setting. Zones not requiring heating or
cooling will close. Once the thermostat is
satisfied, continuous fan speed will
resume.
Features
Vortex air handlers offer many unique
features that set them apart from the
competition:
Soft Start is a feature that starts the fan
slowly and quietly rather than a large
“thump” common in some furnaces and
air handlers.
Evaporator Coil Freeze Protection
If the evaporator coil air temperature
drops outside of the expected operating
range this indicates a potential
evaporator coil freeze condition. Coil
freezing can lead to slugging (liquid
refrigerant going back to the compressor)
which will damage the compressor. All
Zone Comforts come equipped with a
sensor and controller which will respond
by shutting off the outdoor cooling unit to
allow the system to warm up. Note that
this freeze condition is not normal and
may indicate blocked ducts, dirty filter or
an over-sized cooling unit.
PRODUCT DESCRIPTION
To Next Page
Loading...