Carrier Gen 2 Vvt Manual

							Installation, Service, and
Troubleshooting Instructions
PART NO. 33CSZC--01AND33CSZC--PI
CONTENTS
Page
GENERAL................................. 2
INSTALLATION............................ 2-4
Zone Controller Placement................. 2
Wiring Requirements...................... 2
Damper Circuit Board Installation.......... 2
Wiring Connections........................ 2
Indoor-Air Quality (IAQ)
Sensor Installation....................... 3
Provide Power To Damper Circuit Board.... 4
CONFIGURATION.......................... 4,5
Manual Con®guration...................... 4
Computer Con®guration................... 5
ZONE CONTROLLER DISPLAY............. 5-7
System Status Display..................... 5
Rotating Display........................... 5
Alternate Information Display.............. 5
Display Freeze............................ 5
START-UP................................. 7
Device Address........................... 7
Device Bus Number....................... 7
Access Security Level..................... 7
OCCUPIED MODE OPERATION............. 7,8
Occupied Set Points....................... 7
Occupied Set Point Limiting................ 8
UNOCCUPIED MODE OPERATION.......... 8,9
Unoccupied Set Points..................... 8
Occupancy Schedules..................... 8
Schedule Number......................... 9
Unoccupied Override...................... 9
SENSORS.................................9-12
Zone Temperature Monitoring.............. 9
Zone Temperature Sensor.................. 9
Remote Zone Temperature Sensor.......... 10
Duct (Supply Air) Temperature Sensor...... 10
Pressure Sensor........................... 10
Velocity Pressure Probe Calibration......... 11
Indoor-Air Quality Sensor................... 11
DAMPER CONTROL.......................12-14
Damper Interface........................... 12
Damper Modes............................. 12
Pressure Dependent Damper Modulation.... 13
Pressure Independent Damper
Modulation............................... 13Page
SUPPLEMENTAL HEAT....................14-16
Supplemental Heat Interface................ 15
Supplemental Heat Operation............... 15
Supplemental Heating Damper
Modulation............................... 15
METERING................................ 16
HVAC Usage Meter......................... 16
Override Usage Meter...................... 16
Supplemental Heat Override Usage
Meter.................................... 16
DIAGNOSTICS............................17-21
Error Code Display......................... 17
System Errors (SE)......................... 17
Storage Failure (SF) Errors................. 18
Hardware Failure (HF) Errors............... 19
Zone Controller Reset...................... 21
BROADCAST.............................. 21
Broadcast Acknowledge.................... 21
Network Time Request..................... 21
HOLIDAY SCHEDULES..................... 21
ALARM OPTIONS..........................21,22
Equipment Priority......................... 21
Communication Failure Retry Time.......... 21
Re-Alarm Time............................. 21
Alarm Routing Control..................... 22
Alarm System Name....................... 22
ALARM DESCRIPTION.....................22,23
Space Temperature Alarm
(Comfort Trend)........................... 22
Indoor-Air Quality Status Alarm............. 22
NETWORK ACCESSIBLE VARIABLES....... 23
TROUBLESHOOTING......................23-27
General Operating Problems................ 24
Zone Controller Communication
Problems................................. 24
Supplemental Heat Problems............... 25
Zone Controller Wiring..................... 25
INDEX..................................... 28
33CS
Variable Volume and Temperature (VVTT)
Zone Controller Pressure Dependent
and Pressure Independent Control
Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.Book 1 4
Tab 11a 13aPC 111 Catalog No. 533-308 Printed in U.S.A. Form 33CS-7SI Pg 1 3-97 Replaces: VVT-2SI 
						

							GENERAL
The zone controller operates in a VVTtsystem. The VVT
system allows a single-zone heating/cooling unit to operate
as a multiple-zone system. The conditioned space is divided
into occupied zones. Each occupied zone is monitored by a
zone controller. The zone controller regulates the amount of
conditioned air entering a zone through the control of a supply-
air damper. Air¯ow to each zone is controlled individually
by each zone controller.
Each zone controller communicates with the monitor ther-
mostat. The monitor thermostat assesses information from
every zone controller and controls the operation of the heating/
cooling unit.
NOTE: The Comfort System VVT zone controller will
not be compatible with a VVT Generation II Enhanced or
Pre-Enhanced device. The Carrier Comfort System (CCS)
VVT system will not support Enhanced or Pre-Enhanced
devices.
NOTE: The 33CSZC--01 zone controller has pressure de-
pendent control only. The 33CSZC--PI zone controller
will perform pressure dependent or pressure independent
control.
INSTALLATION
Zone Controller Placement Ð
Begin the zone con-
troller installation by determining where the zone controller
will be located. In most cases, this will be pre-determined by
the building plans.
The zone controller should be located on an interior wall,
about 5 ft from the ground. The zone controller should be
located away from direct sunlight, drafts, or interior heat sources
which may in¯uence temperature readings.
The zone controller may also be mounted in a remote
location with the use of an optional remote room sensor.
Refer to the mounting instructions provided with the moni-
tor thermostat for more information on wall installation. See
Fig. 1 for dimensions of the zone controller.
Wiring Requirements ÐThe wiring requirements for
the VVT System are:
ZONE CONTROLLER TO NETWORK Ð Wire must be
18 gage, 3-conductor, shielded, stranded wire, color coded
(RED, BLACK, GREEN), plenum rated if required, and longenough to run from zone controller to zone controller in daisy-
chain con®guration. One end of the shield must be tied to
the chassis ground. The other end must be taped back.
Between the ends, the wire shields must be wire-nutted and
taped together in a daisy chain. A maximum run of 1000 ft
is recommended. With 3 ®eld-supplied repeaters, the maxi-
mum run can be extended to 4000 ft.
Do not ground the wire shield in more than one loca-
tion. Multiple grounding locations will cause electrical
¯ow through the shield and thermostat communications
may be disrupted.
ZONE CONTROLLER TO DAMPER CIRCUIT BOARD
Ð Wire must be 18 gage, 5-conductor, shielded, stranded
wire, color coded (RED, WHITE, BLUE, YELLOW, and
GREEN), plenum rated if required, and long enough to run
from zone controller to damper circuit board.
NOTE: Do not run the zone controller network and the con-
trol wire in the same conduit for more than 5 ft. Never run
wires near any cable carrying AC voltage. For further wiring
information, consult the local Carrier distributor.
Power required to each damper circuit board is 24 vac/ 30 va.
Typical wiring is 18 gage thermostat wire (standard or ple-
num cable). Power to the damper circuit board should come
from a transformer of sufficient VA capacity. A short in the
®eld wiring or transformer will cause non-warranty damage
to the damper circuit board. Test before attaching to damper
actuator.
Call the local Carrier representative if more informa-
tion is needed about wiring the VVT System or the zone
controller.
Damper Circuit Board Installation ÐThe damper
circuit board is located in the damper module. Refer to the
damper installation instructions for more information on the
damper circuit board.
Wiring Connections
WIRE DAMPER CIRCUIT BOARD TO ZONE CONTROL-
LER Ð Wire each zone controller to its respective damper
circuit board as shown in Fig. 2. Wiring connections should
be made at the wiring connector board of the zone controller
and at the damper circuit board.
Fig. 1 Ð Zone Controller Dimensions
2 
						

							Electric shock can cause injury or death. Ensure power
to the transformer has been disconnected before
wiring.
WIRE NETWORK TO ZONE CONTROLLER Ð Connect
the black, red, and green wires from the network cable to the
terminals on the zone controller wiring connector board.
WIRE SENSORS TO DAMPER BOARD Ð The damper
board sensor wiring bundle contains the wires required to
connect the sensors. See Fig. 3. Wire nut the pressure sensor
to the WHT, BLU, and GRN wires in the larger wiring bundle.
The other wires are not used. Wire nut the IAQ (indoor-air
quality) sensor to the smaller wiring bundle.
NOTE: For IAQ sensor wiring and installation, see Indoor-
Air Quality (IAQ) Sensor Installation section.
Indoor-Air Quality (IAQ) Sensor Installation
Ð
An IAQ sensor is designed for use with the Carrier
Comfort system. The sensor has a range of 0 to 5000 ppm
of CO
2. The factory setting is 1000 ppm. This set point is
adjustable only through software. An isolated power supply
of 16 to 24 vac is required and provided with the sensor,
with a 300 mA average and a 500 mA peak. The IAQ
sensors are available in 3 models: Wall Mount with LED
(light-emitting diode), Wall Mount, and Duct Mount.
The wall-mounted sensors are mounted within the occu-
pied space. They read the CO
2levels at their location. The
Wall Mount with LED sensor will display the current read-
ing on the LED display screen on the sensor.
When the IAQ sensor is wired to the zone controller, only
that zone will respond to the sensor. If the IAQ sensor is
wired to a Monitor-Only relay board or to the bypass con-
troller, then any zone can be con®gured to participate in the
IAQ sequence.
NOTE: All wiring is ®eld-supplied.
Fig. 2 Ð Zone Controller Wiring
3 
						

							LOCAL MODE IAQ WIRING Ð Wire the dry contact
relay output from the sensor (connections 3 and 4) to the
red and black wires of the O section of the ®eld-supplied
pressure sensor harness of the zone controller damper. A pres-
sure sensor harness is supplied with a pressure sensor for
use with the bypass damper. Recommended gage of wire is
14, stranded.
Wire the 2 wires from the isolated 24 vac power supply
to the power input side of the sensor (connections 1 and 5).
Recommended gage of wire is 14, stranded. The green/red
LED on the sensor shows steady green during normal
operation.
Con®gure the options associated with the sensor. Refer to
the Indoor-Air Quality Sensor section on page 11.
Provide Power To Damper Circuit Board ÐAfter
the wiring has been completed, provide power to the damper
circuit board. Once power has been provided to the damper
circuit board, the damper circuit board will provide power to
the zone controller. The heating or cooling set points will
appear on the zone controller display screen. The zone con-
troller is now ready to be programmed. If the display is blank
or blinking, recheck the wiring connections between the zone
controller and damper circuit board or refer to Troubleshoot-
ing section on page 23. There should be a steady 10 vdc
between the red and white connections.
CONFIGURATION
Con®guration can be done either manually with the set
point buttons on the monitor thermostat or by computer with
the Carrier network access software (Service Tool, Comfort
System Building Supervisor, or ComfortWorksŸ) through
the system network. Refer to each speci®c section in this
manual for detailed instructions on con®guring the monitor
thermostat options.
A special category of options (category 8) has been
designated as the start-up category. This category contains
options which must be con®gured correctly before the zone
controller will operate. After installation, con®gure the start-up
category ®rst. The start-up category will automatically be
displayed after the zone controller is powered up for the ®rst
time and programming is accessed. The device address must
be con®gured before operating the system. Any time the
device address is equal to 0, the zone controller defaults to
category 8. All other con®gurations may be left at their
default settings for a quick start-up.
Manual Con®guration ÐTo manually con®gure the
zone controller thermostat, press both upper or both lower
set point buttons simultaneously to enter programming mode.
See Fig. 4 and 5. The con®guration screen will display the
current category in the lower right corner (numbered from 1
to 14). Press the left upper or lower set point buttons to ac-
cess the different con®guration categories. Press the select
(right lower set point) button to accept the current category.
The escape (right upper set point) button can be used to re-
turn to the category screen. The categories will loop around
when scrolling from 14 back to 1.
The left upper and lower set point buttons are used
to scroll through the options of each category. The word
``option will be displayed. The option number and the cur-
rent con®guration of the option are displayed in the lower
right corner of the screen. See Table 1 for categories and
options. When the desired option is shown on the screen,
press the select button. The con®gurable data will ¯ash. The
Fig. 3 Ð Damper Board Sensor Wiring
Fig. 4 Ð Zone Controller Display Screen
Fig. 5 Ð Zone Controller Con®guration Buttons
4 
						

							left set point buttons are used to change the data values. When
the desired setting is shown press the select button to store
the change. To exit without saving changes, press both
upper or both lower set point buttons or press the escape
button. If no buttons are pressed while in programming mode
for 4 minutes, the zone controller will reset back to the sys-
tem status display.
Each option is discussed in detail in this manual. Refer to
the correct section for more information.
NOTE: Occupancy schedule programming is slightly dif-
ferent than the above programming procedure. Refer to
the Occupancy Schedules section on page 8 for more
information.
Computer Con®guration ÐTo con®gure the zone
controller with an IBM compatible computer, Carrier net-
work access software (Service Tool, Building Supervisor, Com-
fort System or ComfortWorksŸ) must be used.
ZONE CONTROLLER DISPLAY
The zone controller is capable of different display modes.
The user can decide which display mode the zone controller
will operate in. Information is displayed on the zone con-
troller LCD (liquid crystal display) screen. In normal oper-
ating mode, the system status display is shown.
System Status Display ÐSystem status display is
shown during operation. The display cycles between the heat-
ing and cooling set points and the room temperature when
the Rotating Display option is ON. When the Rotating Dis-
play option is OFF, the thermostat will only display the heat-
ing and cooling set points.
When the fan relay of the heating/cooling equipment is
energized, the word FAN will be displayed on the zone con-
troller screen.
When System Cooling Mode is energized, the word COOL
will be displayed on the zone controller screen. When Sys-
tem Heating Mode is energized, the word HEAT will be dis-
played on the zone controller screen.
If a set point is forced by control software or data transfer,
then an ``F will be displayed on the screen.
If a zone controller has energized supplemental heat, then
``SUH will be displayed. The zone controller will display
both the system mode and the supplemental heat mode if
both are active simultaneously.
If error code display is turned on and a zone is partici-
pating in IAQ, then the display will show ``IAQ to re¯ect
IAQ mode. It will also display error codes.
More information can be shown by accessing the Alter-
nate Information Display function.
Rotating Display ÐThe Rotating Display option con-
trols what information is shown on the display screen duringnormal operation. When Rotating Display is ON, the heat-
ing and cooling set points and the zone temperature are
rotated on the display. When Rotating Display is OFF, only
the heating and cooling set points are shown. The Rotating
Display option is con®gured in category 1, option 5. The
default is OFF.
Alternate Information Display ÐAllows the zone
controller to display additional information. Simultaneously
press the cooling or heating set point buttons, and the zone
controller will display a sequence of information. The in-
formation displayed is determined by the con®guration set-
ting for Alternate Information display. The display can be
frozen by pushing any set point button during the display
sequence.
The Alternate Information display option can be set to ON
or OFF. To con®gure, set category to 7 and option to 2. Use
the left set point buttons to toggle the option ON or OFF.
The default is OFF.
When Alternate Information is ON and the Information
Display mode is activated, the monitor thermostat will dis-
play the following information (if available) in this order:
· (1) zone temperature
· (2) time of day
· (3) security access level
· (4) duct temperature
· (5) zone damper position
· (6) outside-air temperature
· (7) indoor air relative humidity
· (8) air¯ow CFM (33CSZC--PI only)
· (8 or 9) IAQ status (digital input)
The information is shown on the top half of the display
screen. The number of the sequence (1-8 or 1-9) is shown in
the bottom right corner to help distinguish what is being dis-
played. The numbering is not shown when the Alternate
Information display option is turned OFF.
When Alternate Information display is OFF and the
Alternate Information Display mode is activated, the moni-
tor thermostat will display the following information (if avail-
able) in this order:
· zone temperature
· time of day
· security access level
Display Freeze ÐAfter Information Display is acti-
vated, momentarily press any set point button to continu-
ously display the information shown when the set point but-
ton was pressed. Press a set point button to resume the
information display sequence.
NOTE: Normal operation of the zone controller is not af-
fected by the Display Freeze or Alternate Information Dis-
play operations.
5 
						

							Table 1 Ð VVTTZone Controller Categories and Options
OPTION DESCRIPTION DEFAULT MINIMUM MAXIMUM
CATEGORY 1.0 SET POINTS
1.1Cooling Set Point Low Limit (F) 68 50 99
1.2Heating Set Point High Limit (F) 75 50 99
1.3Unoccupied Cooling Set Point (F) 80 50 99
1.4Unoccupied Heating Set Point (F) 65 40 99
1.5Rotating Display OFF OFF ON
1.6Fahrenheit Temperature Display ON OFF ON
CATEGORY 2.0 OCCUPANCY SCHEDULE
2.1-2.8Occupancy Period 1-8
Days Active
Start Time
Stop TimeMTWTF
6:00 AM
6:00 PMNONE
12:00 AM
12:00 AMMTWTFSSH
11:59 PM
11:59 PM
2.9Schedule Number 0 0 99
2.10Override Time Limit (Hours) 1 0 4
CATEGORY 3.0 DAMPER
3.1Maximum Damper Position 15 8 15
3.2Minimum Damper Position 0 0 7
3.3Ventilation Position 5 0 7
3.4Pressure Independent (33CSZC--PI only) OFF OFF ON
3.5ZD/RD Actuator ON OFF ON
3.6Counterclockwise Open ON OFF ON
3.7Minimum Air¯ow Set Point (33CSZC--PI only) 0 0 5000
3.8Maximum Air¯ow Set Point (33CSZC--PI only) 0 0 5000
3.9Damper Size Ð Area (square in.) (33CSZC--PI only) 0 0 1000
CATEGORY 4.0 HVAC EQUIPMENT
No con®guration required by zone controller.
CATEGORY 5.0 SENSORS
5.1Room Sensor (1 Ð Local Room Sensor, 2 Ð Remote Room Sensor, 3
Ð Average Local and Remote Room Sensors)113
5.2Zone Temperature Sensor Calibration (F) Zone Temp. 30 180
5.3Remote Room Sensor Calibration (F) Room Temp. 30 180
5.4Duct Temperature Sensor Calibration (F) Duct Temp. 30 180
5.5Pressure Sensor Range (33CSZC--PI only) 0.5 0.0 5.0
5.6Velocity Pressure Probe Gain (33CSZC--PI only) 1.0 0.5 5.0
5.7Auto-Zero (33CSZC--PI only) OFF OFF ON
5.8Position Damper (33CSZC--PI only) 0 0 15
5.9Pressure Sensor Calibration (in. wg) (33CSZC--PI only) Air¯ow 0 20.47
CATEGORY 6.0 SUPPLEMENTAL HEAT
6.1Zone Supplemental Heat OFF OFF ON
6.2Supplemental Heat Damper Position Factor 0 0 10
6.3Supplemental Heat Time Guard Override OFF OFF ON
6.4Fan Powered Mixing Box 0 0 2
6.5Hydronic Heat OFF OFF ON
6.6Supplemental Heat Lockout Override OFF OFF ON
CATEGORY 7.0 DIAGNOSTICS/METERING
7.1Error Code Display OFF OFF ON
7.2Alternate Information OFF OFF ON
7.3Occupied Trend Demand (1/10ÉF) 0.0 0.0 25.5
7.4Occupied Trend Time Limit (Minutes) 2 1 255
7.5HVAC Usage Meter OFF OFF ON
7.6Override Usage Meter OFF OFF ON
7.7Supplemental Heat Override Usage Meter OFF OFF ON
7.8Unit Reset OFF OFF ON
CATEGORY 8.0 START-UP
8.1Device Element Address 0 0 239
8.2Access Security Level 1 1 4
8.3Device Bus Number 0 0 239
CATEGORY 9.0 BROADCAST / DAYLIGHT SAVINGS TIME
9.1Broadcast Acknowledge OFF OFF ON
9.2Request Network Time OFF OFF ON
6 
						

							Table 1 Ð VVTTZone Controller Categories and Options (cont)
OPTION DESCRIPTION DEFAULT MINIMUM MAXIMUM
CATEGORY 10.0 HOLIDAY SCHEDULES
10.1-10.18Holiday Schedule 1-18
Holiday Start Month
Start Day
Duration (Days)0
0
00
0
012
31
99
CATEGORY 11.0 ALARM
11.1Equipment Priority 7 0 9
11.2Communication Failure Retry Time (Minutes) 10 0 (Disabled) 240
11.3Re-Alarm Time (Minutes) 30 1 255
CATEGORY 12.0 OPTIMAL START
No con®guration required by zone controller.
CATEGORY 13.0 LOADSHED
No con®guration required by zone controller.
CATEGORY 14.0 INDOOR-AIR QUALITY (IAQ)
14.1Indoor-Air Quality Participation OFF OFF ON
14.2Local Indoor-Air Quality Sensor OFF OFF ON
14.3Indoor-Air Quality Maximum Space Temperature Reset (F) 2 0 10
14.4Indoor-Air Quality Alarm Delay (Minutes) 0 0 240
START-UP
The start-up category for con®guration contains impor-
tant communication, security, and operation information which
the zone controller will need to operate.
NOTE: The start-up category will display ®rst when enter-
ing programming mode, when the zone controller has a
device address of zero.
Device Address ÐCommunication with the zone con-
troller is accomplished by the network. The zone controller
utilizes the network to:
· adjust operation parameters
· to receive additional information necessary to control its
zone.
The Device Address option allows the zone controller to
establish an identity on the Carrier network for transmitting
and receiving information. The device address is set in cat-
egory 8, option 1. The factory setting is 0. Use the left set
point buttons to raise and lower the device address until the
correct address is shown on the zone controller. The zone
controller will not operate as part of a VVT system without
a device address.
Device Bus Number ÐOn the network, there is one
primary bus, and any number of secondary busses which
reside off the primary bus. The primary bus is always bus
number 0. The secondary bus address must be between 1
and 239. When the zone controller resides on a secondary
bus, the bus address must be entered into the Device Bus
Number con®guration. The default is 0. Acceptable values
range from 0 to 239. The Device Bus Number is set in cat-
egory 8, option 3.
The primary bus number is always 0. Secondary buses can
be added by using a network bridge module. The secondary
bus number is the device address of the bridge module. Any
devices (monitor thermostat, zone controller, bypass con-
troller) on this secondary bus must have their device bus num-
ber set equal to the device address of the bridge module.
Access Security Level ÐThe access security level
is used to limit access to the zone controller functions by
unauthorized personnel. The access security level is con®g-
ured in category 8, option 2. The factory setting is 1. The
range of acceptable access security levels is 1 to 4.Access security level 1 allows full programming of the
zone controller. Access security level 2 allows programming
of occupied set points and occupancy schedules. Access se-
curity level 3 allows programming of occupied set points
only. Access security level 4 allows no programming.
Do not leave the access security level option at 1 after
con®guration is complete. Untrained or unauthorized us-
ers may change safety set points or other important
information.
If the access security level is changed from 1, the access
security level cannot be changed back in the normal method
because programming is not allowed. To recon®gure the
access security level of the zone controller, activate the
alternate information display (simultaneously press both
heating or both cooling buttons). When the Alternate Infor-
mation Display shows the access security level (display num-
ber 3), press any button to freeze the display. Then press
both upper or both lower set point buttons to enter the
programming mode. Recon®gure category 8, option 2 to the
desired access security level.
OCCUPIED MODE OPERATION
Occupied mode is the time period when the zone control-
ler maintains the occupied set point temperatures. Occupied
time periods are selected to follow the zone controller
occupancy schedule of the zone. See the Unoccupied Mode
Operation section on page 8 for more information on
selection of time schedules. The zone controller follows its
own occupancy schedule or a global schedule which it re-
ceives through communication.
During the occupied mode, the occupied set points:
· can be fully adjusted throughout the occupied set point range
(depending on security level)
· can be limited to maximum and minimum values within
the occupied set point range
Occupied Set Points ÐThe occupied set points es-
tablish the range of acceptable temperatures in a zone during
a given time period. Heating and cooling temperatures are
7 
						

							maintained in the zone controlled by the zone controller dur-
ing the occupied mode. The range of allowable temperatures
is 50 to 99 F for heating and cooling (dependent on the
occupied set point limits).
The left set point buttons control the cooling set point.
Press the top set point button to raise the set point. Press the
bottom set point button to lower the set point. The cooling
set point is displayed in the top left corner of the zone con-
troller screen.
The right set point buttons control the heating set point.
Press the top set point button to raise the set point. Press the
bottom set point button to lower the set point. The heating
set point is displayed in the bottom right corner of the zone
controller screen.
The zone controller will continuously display the occu-
pied set points.
Occupied Set Point Limiting ÐThe occupied set
point limits establish the maximum allowable heating set point
and the minimum allowable cooling set point. The range of
allowable temperature limits is 50 to 99 F for both heating
and cooling.
To con®gure the Cooling Set Point Low Limit option, con-
®gure category 1, option 1. The left set point buttons control
the cooling set point low limit. Press the top set point button
to raise the set point limit. Press the bottom set point button
to lower the set point limit. The cooling set point limit is
displayed in the top left corner of the zone controller screen.
The range of values is 50 to 99. The default is 68.
To con®gure the Heating Set Point High Limit option, con-
®gure category 1, option 2. The left set point buttons control
the heating set point upper limit. Press the top set point but-
ton to raise the set point limit. Press the bottom set point
button to lower the set point limit. The range of values is 50
to 99. The default is 75.
By limiting the occupied set points to a de®ned range, the
heating and cooling system will operate within desired
parameters.
UNOCCUPIED MODE OPERATION
Unoccupied mode is the time period when the zone
controller maintains the unoccupied set point temperatures.
Unoccupied time periods follow the schedule of the zone
controller zone. Unoccupied time periods allow for lower
heating temperature set points and higher cooling tempera-
ture set points to conserve equipment usage when the zone
is unoccupied. The zone controller follows its own occu-
pancy schedule or a global schedule which it receives through
communication.
The zone controller unoccupied time periods may be
controlled:
· locally by the zone controller, which will follow its own
programmed unoccupied and occupied time periods
· through communication from another device on the com-
munication bus, which will send the zone controller an oc-
cupied schedule.
During local control the unoccupied/occupied programs
can be locked to prevent unauthorized or unintentional changes.
When the zone controller is in a time period designated for
unoccupied mode operation, zone occupants can tempo-
rarily override unoccupied operation to the occupied mode.
During unoccupied override, the zone controller will follow
the occupied set points. At the end of the override period,
the zone controller will automatically return to unoccupied
mode operation. The amount of override time is con®gured
through category 2, option 10. The range is from 0 to 4 hours
in 1 hour increments. The override is disabled if the Over-
ride Time Limit option is set to 0. The default is 1 hour.NOTE: Once the zone controller is in unoccupied override
mode, it cannot be cancelled by the user from the zone con-
troller. Network access software or a unit reset will cancel
unoccupied override.
When the zone controller is operating in unoccupied mode,
the unoccupied set points will be displayed on the zone con-
troller screen.
Unoccupied Set Points ÐThe unoccupied set points
establish the range of acceptable temperatures maintained in
the zone controlled by the zone controller during the unoc-
cupied mode. The range of allowable temperatures is 40 to
99 F for heating and 50 to 99 F for cooling.
To con®gure the unoccupied cooling set points, set cat-
egory 1, option 3. The left set point buttons control the un-
occupied cooling set point. Press the top set point button to
raise the set point. Press the bottom set point button to lower
the set point. The unoccupied cooling set point is displayed
in the top left corner of the zone controller screen. The range
is 50 to 99 F. The default value is 80 F.
To con®gure the unoccupied heating set points, set cat-
egory 1, option 4. The left set point buttons control the un-
occupied heating set point. Press the top set point button to
raise the set point. Press the bottom set point button to lower
the set point. The unoccupied heating set point is displayed
in the top left corner of the zone controller screen. The range
is 40 to 99 F. The default value is 65 F.
Occupancy Schedules ÐThe occupancy schedules
establish the time periods when the zone controller operates
in the occupied or unoccupied mode.
The occupancy schedules have individual 7-day program-
ming with 8 time periods. Unoccupied/occupied ON/OFF times
are entered on the minute. The start of an ON time is the
beginning of the occupied mode. The start of an OFF time
is the beginning of the unoccupied mode.
NOTE: If an ON time and an OFF time are set for the same
hour, zone controller operates in unoccupied mode for that
entire day.
The Unoccupied/Occupied program of the zone control-
ler can be con®gured locally using program mode.
PROGRAMMING SCHEDULES USING SOFTWARE Ð
Each occupancy time schedule consists of 8 periods. From
the Carrier network access software each period may be con-
®gured. Three con®guration options are set from the soft-
ware: Occupied From, Occupied To, and Days of the Week
the schedule is in effect. Eight different days are recognized:
Monday through Sunday, and Holiday.
OCCUPANCY SCHEDULE MODE Ð The unoccupied/
occupied program can be directly con®gured at the zone
controller. Press both upper (or lower) set point buttons at
the same time to enter into the program mode. The occu-
pancy schedules are in category 2, options 1 through 8.
Option 1 is occupied schedule 1. Option 2 is occupied sched-
ule 2. The options continue to option 8 which is occupancy
schedule 8.
The procedure is different than programming other op-
tions. When category 2 is shown on the display screen, press
the select (lower right) button. The display will show
option 1. This will show the start time for option 1 only. To
modify the start time for option 1, press select. Only the time
will be modi®ed. To modify to the stop time for option 1
press the upper left set point button. Instead of displaying
option 2, the stop time for option 1 will be shown. Press the
select button to modify the stop time. To modify the days of
the week that the occupancy schedule will be active, use the
upper left set point button to toggle to the next option.
8 
						

							Instead of showing option 2, the screen will display the
active days for the occupied schedule. Each occupied sched-
ule (options 2.1 through 2.8) will have three different screens
associated with it Ð start time, stop time, and active days.
Start Time Ð When the select button is pressed from the
®rst option screen, the hours number will ¯ash. The hours
are modi®ed through the left set point buttons. The AM/PM
modi®er will automatically switch when scrolling through
the times. To change the minutes, press the select button again.
The minutes numbers will ¯ash. Use the left set point but-
tons to modify the minutes. Press select again to save the
current time and return to the options screen, or press escape
to exit without saving changes.
Stop Time Ð When the select button is pressed from the sec-
ond option screen, the hours number will ¯ash. The hours
are modi®ed through the left set point buttons. The AM/PM
modi®er will automatically switch when scrolling through
the times. To change the minutes, press the select button again.
The minutes numbers will ¯ash. Use the left set point but-
tons to modify the minutes. Press select again to save the
current time and return to the options screen, or press escape
to exit without saving changes.
Active Days Ð When the select button is pressed from the
third option screen, the active days will be shown and the
®rst day, M (Monday) will be blinking. Use the left set point
buttons to turn the day ON or OFF. Use the select button to
scroll through the possible active days. The programmable
days are: M (Monday), T (Tuesday), W (Wednesday), TH
(Thursday), F (Friday), SA (Saturday), SU (Sunday), and H
(Holiday).
Schedule Number ÐIf Schedule Number option is set
to 0, the zone controller will always be in occupied mode. If
Schedule Number option is set to 1 through 64, the zone
controller will follow the unoccupied/occupied programs stored
in memory. If Schedule Number option is set to 65 through
99, the zone controller will follow the unoccupied/occupied
programs speci®ed in the global schedule located elsewhere
on the network. If a global schedule is con®gured and there
is not a device broadcasting a global schedule, then the zone
controller will run in unoccupied mode.
To con®gure the Schedule Number option, con®gure cat-
egory 2, option 9. Use the left set point buttons to toggle the
option until the correct number is shown. The range of ac-
ceptable values is 0 to 99. The default value is 0.
Unoccupied Override ÐUnoccupied Override tem-
porarily overrides the unoccupied mode at the zone control-
ler, allowing the zone to maintain occupied set points. To
activate unoccupied override, press the lower cooling or up-
per heating set point button. The unoccupied display will be
replaced with the normal display. Once initiated, unoccu-
pied override remains in effect until the end of the Unoc-
cupied Override Time Limit, or the start of the occupied mode.
To disable unoccupied override, con®gure the Unoccu-
pied Override Time Limit to 0 hours.
UNOCCUPIED OVERRIDE TIME LIMIT Ð The Over-
ride Time Limit establishes the amount of time the zone con-
troller operates in the occupied mode when unoccupied override
is activated. To set the option, con®gure category 2, option
10. The number of hours will be displayed. Press the upper
set point button to raise the time limit. Press the lower set
point button to lower the time limit. The range is 0 to 4 hours
in 1 hour increments. To disable unoccupied override, con-
®gure the time limit to 0 hours. The default value is
1 hour.
SENSORS
The zone controller utilizes information from the follow-
ing sensors to operate a zone damper:
· zone temperature sensor
· remote room temperature sensor
· supply air (duct) temperature sensor
· pressure sensor (33CSZC--PI only)
· Indoor-air quality (IAQ) sensor
When necessary, sensor calibration can be performed at
the zone controller with the appropriate tools.
Zone Temperature Monitoring ÐThe zone con-
troller can use a sensor installed on its circuit board or a ®eld-
installed remote room sensor, to monitor the temperature in
the zone.
The zone controller can do one of the following:
· use the local zone temperature sensor for temperature in-
formation
· use its remote room sensor(s) (®eld installed) for tempera-
ture information
· average the temperatures it receives from its local room
temperature sensor and one remote room sensor for tem-
perature information.
To con®gure the room sensor, select category 5, option 1.
When the Room Sensor option is set to 1, the zone control-
ler will use the local zone temperature sensor for tempera-
ture information. When the Room sensor option is set to 2,
the zone controller uses its remote room sensor(s) (up to 4,
®eld-installed) for temperature information. When the Room
Sensor option is set to 3, the zone controller averages the
temperatures it receives from its local room temperature
sensor and one remote room sensor for temperature information.
Zone Temperature Sensor ÐThe zone controller mea-
sures zone temperature through a solid-state temperature
sensor located on the printed circuit board. See Fig. 6. The
sensor measures temperature with a range of 30 to 180 F
with 1/10 degree resolution.
ZONE TEMPERATURE SENSOR CALIBRATION Ð To
calibrate the zone temperature sensor, con®gure category 5,
option 2. The temperature reading of the sensor will be dis-
played. Compare the reading to an accurate thermometer. Use
the left upper or lower set point buttons to raise or lower the
temperature reading (by tenths of a degree) until the desired
calibrated temperature is shown. The range of possible tem-
peratures is 30 to 180 F.
Fig. 6 Ð Zone Temperature Sensor
9 
						

							Remote Room Temperature Sensor ÐThe zone
controller measures zone temperature through a solid-state
temperature sensor located at a remote location up to
1000 ft from the zone controller. The sensor measures tem-
perature with a range of 30 to 180 F in 1/10 degree incre-
ments. The remote room temperature sensor is connected to
the zone controller through the wiring connector board.
See Fig. 7. Up to 4 remote room sensors can be used. When
more than 1 remote room sensor is used, the temperatures
are averaged.
All sensors must be wired in parallel. When adding re-
mote room sensors, a ®eld-supplied 9.2 K ohm resistor must
be added to the connector block for each sensor. See Fig. 7.
REMOTE ROOM TEMPERATURE SENSOR CALIBRA-
TION Ð To calibrate the remote room temperature sensor,
con®gure category 5, option 3. The temperature reading of
the sensor will be displayed. Compare the reading to an
accurate thermometer placed in the approximate center of
the space (or measure temperature at each sensor and manu-
ally compute the average). Use the left upper or lower set
point buttons to raise or lower the temperature reading (by
tenths of a degree) until the desired calibrated temperature is
shown. The range of possible temperatures is 30 to 180 F.
Duct (Supply Air) Temperature Sensor ÐThe zone
controller measures duct (supply air) temperature through a
solid-state temperature sensor located in the supply air duct.
See Fig. 8. The sensor can be located up to 500 ft from the
zone controller. The sensor measures temperature with a range
of 30 to 180 F with 1/10 degree resolution.
DUCT TEMPERATURE SENSOR CALIBRATION Ð To
calibrate the duct temperature sensor, con®gure category 5,
option 4. The temperature reading of the sensor will be dis-
played. Compare the reading to an accurate thermometer. Use
the left upper or lower set point buttons to raise or lower the
temperature reading (by tenths of a degree) until the desired
calibrated temperature is shown. The range of possible tem-
peratures is 30 to 180 F.
Pressure Sensor ÐThe 33CSZC--PI zone controller
can measure air¯ow pressure up to 100 ft from the damper
actuator through a solid-state sensor in a range of 0.0 to
5.0 in. wg. The range is determined by the pressure sensor
used in the application and is con®gured in the pressure sen-
sor range option (category 5, option 5). The option can be
set from 0.0 to 5.0 in. wg. The default is 0.5 in. wg. Use the
left set point buttons to adjust the range of the pressure sen-
sor which is determined by the type of sensor being used.
A 33CSPS-01 sensor should be con®gured to 0.5 in. wg.
A 33CSPS-02 pressure sensor should be con®gured to
2.0 in. wg.
NOTE: The 33CSPS-01 pressure sensor uses a velocity probe.
The 33CSPS-02 pressure sensor uses a static pickup or
velocity probe. A typical pressure sensor installation would
use the pressure sensor and a corresponding enclosure; how-
ever in applications using a ZD model zone damper, only
the pressure sensor circuit board will ®t inside the damper
actuator.
The pressure sensor is interfaced to the zone controller
through the printed circuit board in the zone damper actua-
tor. See Fig. 9. Refer to the pressure sensor installation
instructions for more speci®c pressure sensor wiring.
PRESSURE SENSOR CALIBRATION Ð The pressure
sensor can be calibrated through category 5, option 9. The
pressure sensor reading will be shown. Use the left set point
buttons to raise or lower the pressure reading to the desired
value. The range of values is 0.00 to 20.47 in. wg.
NOTE: For each additional sensor (2 or more total) a resistor must be
added. Resistors are wired in parallel between terminals RS- and W
on the thermostat terminal block.
Example shown is for 4 Remote Room Sensors.
Fig. 7 Ð Remote Room Sensor Wiring
Fig. 8 Ð Duct (Supply Air) Temperature Sensor
Location
Fig. 9 Ð 33CSZC--PI Zone Controller and
Air¯ow Sensor Wiring For Pressure
Independent Operation (ZD Model Damper
Mounted Air¯ow Sensor)
10