Relay Pack Installation; Wiring Connections; Indoor-Air Quality Sensor Installation; Provide Power To Relay Pack - Carrier 33CS Installation, Service, And Troubleshooting Instructions

Relay Pack Installation —
installed in the HVAC unit control box if climate or space
conditions allow. If the temperature range of 32 to 150 F
may be exceeded (at a relative non-condensing humidity of
less than 95%), then the relay pack should be installed at
another location such as a plenum space or utility room.
NOTE: Factory-installed relay packs are available for some
Carrier rooftop units. Refer to the Apollo control installation
instructions for information on the placement of the factory-
installed Apollo control in the rooftop unit.

Wiring Connections

WIRE RELAY PACK TO THERMOSTAT — Wire each ther-
mostat to its respective relay pack as shown in Fig. 3. Wir-
ing connections should be made at the wiring connector board
of the thermostat.
Electric shock can cause injury or death. Ensure power
to the transformer has been disconnected before wiring.
WIRE RELAY PACK TO HVAC UNIT — Wire the relay
pack to the HVAC unit as shown in Fig. 4 or 5. Refer to
Fig. 4 for TEMP System relay packs. Refer to Fig. 5 for TEMP
System relay packs with auxiliary relay. All wiring and the
relay pack should be kept a minimum of 12 in. away from
any cables carrying AC current. For more information refer
to the installation instructions included with each relay pack.
WIRE SENSORS TO RELAY PACK — Wire the sensors to
the relay pack. See Fig. 3.
NOTE: Humidity Sensor and Fan Status Switch cannot be
wired to the same relay pack.
Indoor-Air Quality Sensor Installation —
air quality (IAQ) sensor is designed for use with the Carrier
Comfort system. The sensor has a range of 0 to 5000 ppm
of CO . The factory setting is 1000 ppm. This set point is
2
adjustable only through software. An isolated power supply
of 16 to 24 vac is supplied 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
Wall Mount with LED sensor will display the current read-
ing on the LED display screen on the sensor.
When the IAQ sensor is used in TEMP system applica-
tions, it is usually wall-mounted and wired to the relay pack.
TEMP SYSTEM IAQ SENSOR WIRING — Wire the dry
contact relay output from the sensor (connections 3 and 4)
to terminals 6 and 7 of the relay pack. Recommended gage
of wire is 14, stranded.
Wire the 2 wires from the isolated 16-24 vac power sup-
ply 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.
The relay pack should be
An indoor-
levels at their location. The
2
Configure the options associated with the sensor. Refer to
the IAQ Sensor section on page 14.
Provide Power To Relay Pack —
has been completed, provide power to the relay pack. Once
power has been provided to the relay pack, the relay pack
will provide power to the thermostat. The heating or cooling
set points will appear on the thermostat display screen. The
thermostat is now ready to be programmed. If the display is
blank or blinking, recheck the wiring connections between
the thermostat and relay pack. There should be a steady
10 vdc between the red and white connections.

CONFIGURATION

Configuration can be done either manually with the set
point buttons on the TEMP system thermostat, or by com-
puter with the Carrier network access software through the
system network. Refer to each specific section in this manual
for detailed instructions on configuring the TEMP system
thermostat options. Refer to the software manual for net-
work software configuration.
A special start-up category of options (category 8.0) have
been designated as the start-up category. This category con-
tains options that must be configured correctly before the
TEMP system thermostat will operate. After installation, con-
figure the start-up (8.0) category first. The start-up category
will automatically be displayed when programming mode is
accessed, after the thermostat is powered up for the first time
or when the device address is set to 0.
Manual Configuration —
TEMP system thermostat, press both upper or both lower set
point buttons simultaneously. See Fig. 6 and 7. The configu-
ration 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 access the different configuration
categories. Press the select (right lower set point) button to
accept the current category for modification. The word ''op-
tion'' will be displayed, along with the current option num-
ber. The escape (right upper set point) button can be used to
return 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 toggle
through the options of each category. The word ''option,''
the option number, and the current data stored in the option
are displayed on the screen. See Table 1 for categories and
options. When the desired option is shown on the screen,
press the select button. The configurable data will flash. The
left set point buttons are used to toggle or change the data
values. When the desired setting is shown press the enter
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 program-
ming mode for 3 minutes, the TEMP system thermostat will
reset back to the normal display.
Each option is discussed in detail in this manual. Refer to
the correct section for more information.
Computer Configuration —
system thermostat with an IBM compatible computer,
Carrier network access software must be used.
4
After the wiring
To manually configure the
To configure the TEMP