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6. The zone controller will send all system zone dampers to
their configured minimum positions and display the
values. Check the system bypass pressure and set the
pressure set point. Adjust minimum damper set points if
required.
7. If the user forces any zones to a new position, the new
position is written to the zone’s minimum damper posi-
tion configuration value and the damper is repositioned.
8. Enable the Position Single Zone point.
9. The zone controller will send all system zone dampers to
their configured maximum positions and display the
values.
10. If the user forces any zones to a new position, the new po-
sition is written to the zone’s maximum damper position
configuration value and the damper is repositioned.
11. At this time, the user can force the Bypass Pressure set
point. Typically, the maximum unit rated duct static is
used. The zone controller will then write the forced
Bypass Pressure set point to the set point table in the
Bypass Controller by communicating over the network.
The bypass controller will then begin to control to the
new bypass pressure set point.
Status Table —
The following sections describe the com-
puter status screen which is used to determine status the zone
controller. The screens shown may be displayed differently
when using different Carrier software. See Table 4.
TERMINAL MODE — The terminal mode is determined by
the equipment mode as reported by linkage and space require-
ments determined by space temperature and set points. The
ZONE_BAL and COMMISS modes are the result of the
activating the commissioning maintenance table to perform
terminal testing and commissioning.
Terminal Mode:Display Units
ASCII
Default Value
COOL
Display Range
HEAT,
COOL,
VENT,
REHEAT,
PRESSURE,
EVAC, OFF, ZONE_BAL,
COMMISS
Network Access Read only
TERMINAL TYPE — Terminal type is the confirmation of
the terminal type configuration in the CONFIG Service Config
table.
Terminal Type:
Display Units
ASCII
Default value
SINGLDUCT
Display Range
SINGLDUCT, PAR
FAN, SER FAN
Network Access Read only
CONTROLLING SETPOINT — Controlling Set Point will
display either the heating master reference or the cooling mas-
ter reference depending upon what mode the terminal is in. The
display will default to the heating master reference and display
the last controlling master reference when in neither heating
nor cooling.
Controlling
Setpoint:
Display Units
F (C)
Default Value
–40
Display Range
–40 to 245
Network Access Read only
SPACE TEMPERATURE — Space temperature from 10 k
Ω
thermistor (Type II) located in the space. The point name of the
displayed Space Temperature is “SPACE_T” in this status dis-
play table. This point may be forced for diagnostic purposes.
A non-displayed variable named SPT also exists within the
zone controller as a writeable point for normal operations with
a System Pilot or other devices that will write a space tempera-
ture to the zone controller. The zone controller verifies that the
SPT point is being written to before using it to update the
SPACE_T point. Values that are received at the SPT point may
be averaged with the hardware space temperature input.
Space
Temperature:
Display Units
F (C)
Default Value
–40.0
Display Range
–40.0 to 245.0
Network Access Read/Write
DAMPER POSITION — Damper position percent range of
rotation determined by the transducer calibration procedure.
The zone controller is designed be used on dampers with any
range of rotation.
Damper
Position:
Display Units
% open
Default Value
0
Display Range
0 to 100
Network Access Read only
SUPPLY AIR TEMPERATURE — This reading is the tem-
perature of the air provided by the air source. If ducted heat is
present, this sensor may be relocated to measure temperature of
the air leaving the zone controller downstream of any ducted
heat source. Measured by a 10 k
Ω
thermistor (Type II). This
temperature may be used to control the maximum discharge air
to the space when local heat is active. The local SAT Installed
configuration is used to enable or disable this sensor.
Supply
Air Temperature: Display Units
F (C)
Default Value
0.0
Display Range
–40.0 to 245.0
Network Access Read/Write
LOCAL HEATING CAPACITY — When local heat at the
terminal is enabled the percent of heat being delivered is deter-
mined by the following formula for modulating (floating point)
type heat:
% Capacity = [(SAT - SPT)/(Maximum Duct Temp – SPT)]
The percent of heat delivered is determined by the follow-
ing for two-position hot water or staged electric heat:
% Output Capacity = (no. of active stages/Total stages) * 100
Local Heating
Capacity:
Display Units
% output capacity
Default Value
0
Display range
0 to 100
Network Access Read only
TERMINAL FAN — The commanded output for the terminal
fan on a fan powered terminal.
Terminal Fan:
Display Units
Discrete ASCII
Default Value
Off
Display Range
Off/On
Network Access Read/Write
RELATIVE HUMIDITY — Space Relative Humidity read-
ing from the optional relative humidity sensor. The humidity
reading is used for display and monitoring purposes only.
Relative
Humidity:
Display Units
% RH
Default Value
0
Display Range
0 to 100
Network Access Read/Write
1104
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