29
Demand Ventilation
— The unit can be equipped with a CO
2
sensor for use in demand ventilation. This can be factory
supplied and will be mounted in the return duct. It can also be
field supplied and mounted in the return duct or in the space.
Connect the field-installed 4 to 20 mA sensor to TB5 terminals
6 and 7. Do not remove the factory-installed 182-ohm resistor.
If an outdoor air quality sensor is used then it should be
wired to terminal 11 and 12 on TB6. This will require the use
of the optional controls expansion module.
Remote IAQ Override
— If the control is being used with non
Carrier building management system it supports the use of the
remote IAQ override switch. This should be connected to
TB6 terminal 13 and 14. Use of this will require the optional
controls expansion module.
Remote Economizer Position Control
— The ComfortLink
controls will normally control the position of the economizer,
but it can also support field control of the economizer position
through a 4 to 20 mA signal. If this is used it should be con-
nected to TB5 terminal 6 and 7. If the signal is a 4 to 20 mA
signal then leave the 182-ohm resistor in place.
Remote Economizer Enable
— If the control is being used
with other building management systems and the system will
control the enabling and disabling of the economizer free cool-
ing, this switch input can be connected to TB6 terminals 1 and
2. Note that the controls also support integrated economizer
changeover using outdoor dry bulb, differential dry bulb,
outdoor enthalpy and differential enthalpy.
Remote Occupancy Switch
— For interface to other building
management systems the control also supports a switch input
for remote occupancy signals. This wiring should be connected
to terminal TB6 terminal 1 and 3.
Remote Economizer Minimum Position Control
— If the
ComfortLink controller is controlling the economizer, but a re-
mote minimum position is required, then an external 100K po-
tentiometer can be connected to TB5 terminal 6 and 7. Remove
the factory-installed 182-ohm resistor.
Smoke Sensor Interface
— The ComfortLink controller in-
cludes an optional factory-installed return air smoke detector.
Remote alarm circuits can be wired to TB5 terminal 8 and 9.
Fire Shutdown and Smoke Control
— The control supports
interface to fire and smoke control systems and allows for the
following system overrides from remote switch inputs.
• Fire Shutdown — Connect to TB5 terminals 10 and
11.
• Smoke Pressurization — Connect to TB5 terminals
12 and 13. This requires the use of the optional con-
trols expansion module.
• Smoke Evacuation — Connect to TB5 terminals 12 and
14. This requires the use of the optional controls expan-
sion module.
• Smoke Purge — Connect to TB5 terminals 12 and 15.
This requires the use of the optional controls expansion
module.
Demand Limiting
— The control can also be used with demand
limiting control from remote building management systems. If a
two-stage system is going to be used with redline limiting where
the machine is not allowed to increase load and load shed where
the load is decreased to a configurable limit in capacity then these
can be connected to TB6 terminals 4 and 5, and 5 and 6. This re-
quires use of the controls expansion module.
3
4
RED
BLK
TB5
3
4
TB5
SENSOR 1
SENSOR 2
SENSOR 3
SENSOR 4
SENSOR 1
SENSOR 2 SENSOR 3
SENSOR 4
SENSOR 5
SENSOR 6
SENSOR 7
SENSOR 8
SENSOR 9
SPACE TEMPERATURE AVERAGING (4 SENSOR APPLICATION)
SPACE TEMPERATURE AVERAGING (9 SENSOR APPLICATION)
NOTE: Use T55 sensor only.
Fig. 22 — Space Temperature Averaging Wiring
a48-6855
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