Carrier 48AJ/AK/AMD020, Руководство по установке

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VAV Units With Heat — For variable air volume units that
will use heat, the variable air volume terminals should be
interlocked with the unit at TB5 terminals 1 and 2 as shown on
the wiring diagram. See Fig. 21.
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 sensor to TB5 terminal 6 and 7. Do
not remove the factory-installed 150-ohm sensor. See Fig. 21.
If an outdoor IAQ 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. See Fig. 24.
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 150-ohm resistor in place. See Fig. 21.
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, out-
door enthalpy and differential enthalpy. See Fig. 22.
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. See Fig. 22.
Remote Economizer Minimum Position Control — If the
ComfortLink control is controlling the economizer, but a
remote minimum position is required then an external 100K
potentiometer should be connected to TB5 terminal 6 and 7.
See Fig. 21.
Smoke Sensor Interface — The ComfortLink controls in-
cludes an optional factory-installed return air smoke detector.
Remote alarm circuits can be wired to TB5 terminal 8 and 9 as
shown in Fig. 21.
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.
• Smoke Pressurization — Connect to TB6 terminal 12 and
13. This requires the use of the Controls Expansion Module.
• Smoke Evacuation — Connect to TB6 terminal 12 and 14.
This requires the use of the Controls Expansion Module.
• Smoke Purge — Connect to TB6 terminal 12 and 15. This
requires the use of the Controls Expansion Module.
Demand Limiting — The control can also be used with de-
mand limiting control from remote building management sys-
tems. 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 requires use of the Controls Expansion
Module.