Carrier WeatherMaker 48A020 Installation Instructions Manual page 27

wired to the negative pins, and the signal pins must be wired to
signal ground pins. Wiring connections for CCN system should be
made at the TB3 terminal block using the screw terminals. The
TB3 board also contains an RJ14 CCN plug that can be used to
connect a field service computer or other CCN device temporarily.
There is also an RJ14 LEN (local equipment network) connection
that is used to connect a Navigator
Conductors and drain wire must be 20 AWG minimum stranded,
tinned copper. Individual conductors must be insulated with PVC,
PVC/nylon, vinyl, Teflon , or polyethylene. An aluminum/polyes-
1
ter 100% foil shield and an outer jacket of PVC, PVC/nylon,
chrome vinyl, or Teflon with a minimum operating temperature
range of –20°C to 60°C (–4°F to 140°F) is required. Table 9 lists
cables that meet the requirements.
Table 9 — CCN Connection Approved Shield Cable
MANUFACTURER
Alpha
American
Belden
Columbia
IMPORTANT: When connecting to CCN communication
bus to system elements, use color coding system for the
entire network to simplify installation and checkout. See
Table 10.
Table 10 — Color Code Recommendations
CCN BUS CONDUCTOR
SIGNAL TYPE
INSULATION COLOR
Positive (+)
Ground
Negative (–)
If a cable with a different color scheme is selected, a similar color
code should be adopted for the entire network. At each system ele-
ment, the shields of the communication bus cables must be tied
together. If the communication bus is entirely within one building,
the resulting continuous shield must be connected to a ground at
one point only. If the communication bus cable exits from one
building and enters another, the shields must be connected to
grounds at the lightning suppressor in each building where the
cable enters or exits the building (one point per building only).
To connect the unit to the network:
1. Turn off power to the control box.
2. Cut the CCN wire and strip the ends of the red (+), white
(ground), and black (–) conductors. (If a different network
color scheme is used, substitute appropriate colors.)
3. Remove the 3-pin male plug from the base control board in
the main control box, and connect the wires as follows:
a. Insert and secure the red (+) wire to terminal 1 of the
3-pin plug.
b. Insert and secure the white (ground) wire to terminal 2 of
the 3-pin plug.
c. Insert and secure the black (–) wire to terminal 3 of the
3-pin plug.
4. Insert the plug into the existing 3-pin mating connector on the
base module in the main control box.
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 ter-
minals 1 and 2.
1. Teflon is a registered trademark of DuPont.
device or download software.
™
CABLE PART NO.
2413 or 5463
A22503
8772
02525
CCN PLUG
PIN NO.
RED 1
WHITE 2
BLACK 3
Demand Controlled Ventilation
The unit can be equipped with a CO
ventilation. This can be factory supplied and will be mounted in
the return duct. It can also be field supplied and mounted in the re-
turn 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 option-
al controls expansion module.
Remote IAQ Override
If the control is being used with a non-Carrier building manage-
ment 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 econo-
mizer position through a 4 to 20 mA signal. If this is used it should
be connected 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 sys-
tems and the system will control the enabling and disabling of the
economizer free cooling, this switch input can be connected to
TB6 terminals 1 and 2. Note that the controls also support inte-
grated 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
remote 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 includes 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 controls expansion
module.
• Smoke Evacuation — Connect to TB5 terminals 12 and
14. This requires the use of the optional controls expansion
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 go-
ing to be used with redline limiting where the machine is not al-
lowed 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 con-
trols expansion module.
27
sensor for use in demand
2