WaterFurnace IntelliZone2 Installation Manual - Intellizone2
17
INTELLIZONE2
● 24V INSTALLATION MANUAL
It is a common assumption that if you have a house with
two zones equally divided each zone should be set at an
equal amount, usually 70%. As can be seen in the above
example, it will take a “Y3” call from one zone as well as a
“Y2” call from the second zone to obtain auxiliary heat.
This is a simple example, but three-zone and four-zone
systems are calculated in the same manner. Blower speeds
are not set or regulated by the zoning system. Blower
speeds are set at the heat pump. As a serviceman, the
temptation arises, in some instances, to influence the logic
of the board by jumping “Y1” and “Y2”. While this will
create a quicker response, the ductwork of that zone must
be capable of handling the cfm delivered by the unit (i.e., if
a “Y2” signal is given to the unit, can the ductwork handle
the total cfm of the unit).
When setting up a new system remember that if you have
unused zones they must be set to zero. If they are not, the
setting that they have will be included in the total demand
preventing the other zones from operating correctly, as
there will be no inputs on those zones.
The IntelliZone2
● 24V allows the selection of either
comfort or economy mode in each individual zone to
provide maximum savings in areas that allow it (such as
workshops and basements), while maintaining perfect
comfort in the zones where accurate temperature is most
desired (such as bedrooms and baths).
Zone Priority
Comfort Mode - A single zone call (Y1) for conditioning
will engage the compressor and allow a minimal set point
variation, thus providing ultimate comfort.
Economy Mode - A single zone call (Y1) for conditioning
will be ignored by the IntelliZone2
● 24V until either a Y2
call is initiated from the same zone or another zone calls
for conditioning (Y1). This allows a slightly greater set point
variation than in comfort mode. This setting prevents less
important zones from energizing the compressor unless
it is really needed, thus saving money. As a bonus in this
mode, upon a Y1 call, the IntelliZone2
● 24V may try to
precondition the zone with return air from other zones
already satisfied and, in some cases, can preclude the need
for energizing the compressor.
Zones - Displays the inputs that the Intellizone2
● 24V is
receiving.
Status - Displays the outputs that the IntelliZone2
● 24V is
sending to the equipment.
Test Mode - In Test mode ‘Central Zone’ mode can be
selected. In Central mode all dampers are opened and
thermostat readings are taken ONLY from the Zone 1
MasterStat. This will approximate operation without a
zone system (all dampers open and Masterstat controls
temperature) and can be useful during initial construction
of the home or during service etc.
Also in ‘Central Zone’ mode each damper can be
individually cycled off/on to verify operation during
Installation or service. It should be noted that the
MasterStat Z2TK troubleshooting harness can be useful
here by allowing the temporary connection of the
MasterStat directly at the IntelliZone2 relay board for ease
of configuration or servicing.
IntelliZone2
● 24V Confi guration cont.