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...

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-...

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...

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,...

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...

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...

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...

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...

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,...

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...