Non-Ccn Communication Wiring; Field Control Option Wiring; Dual Chiller Leaving Water Sensor - Carrier AquaForce 30XA Series Installation Instructions Manual

Table 11 — CCN Communication Bus Wiring
MANUFACTURER
Regular Wiring
Alpha
American
Belden
Columbia
Manhatten
Quabik
4. The RJ14 CCN connector on TB3 can also be used, but is
only intended for temporary connection (for example, a lap-
top computer running service tool).
IMPORTANT: A shorted CCN bus cable will prevent
some routines from running and may prevent the unit
from starting. If abnormal conditions occur, disconnect
the machine from the CCN. If conditions return to nor-
mal, check the CCN connector and cable. Run new cable
if necessary. A short in one section of the bus can cause
problems with all system elements on the bus.

NON-CCN COMMUNICATION WIRING

The 30XA units offer several non-CCN translators. Refer to the
separate installation instructions for additional wiring steps.
(+) (COM) (-) SHIELD
CCN
LEN
a30-4001
LEGEND
CCN — Carrier Comfort Network®
LEN — Local Equipment Network
5/8 in. HEX
6" MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
Fig. 60 — Dual Chiller Accessory Kit Leaving Water Thermistor and Well (Part No. 00EFN900044000A)
PART NUMBER
Plenum Wiring
1895 —
A21451 A48301
8205 884421
D6451 —
M13402 M64430
6130 —
CCN
LEN
SHIELD
Fig. 59 — TB3 — CCN Wiring
1/4-18 NPT
1.188 in.

FIELD CONTROL OPTION WIRING

Install field control wiring options. Some options, such as 4 to 20
mA demand limit that requires the energy management module,
may require that accessories be installed first (if not factory in-
stalled) for terminal connections.

DUAL CHILLER LEAVING WATER SENSOR

If the dual chiller algorithm is used and the machines are installed
in parallel, an additional chilled water sensor must be installed for
each chiller. Install the wells in the common leaving water header.
See Fig 60. DO NOT relocate the chiller's leaving water thermis-
tors. They must remain in place for the unit to operate properly.
The thermistor well is a
the piping. The piping must be drilled and tapped for the well. Se-
lect a location that will allow for removal of the thermistor without
any restrictions.
Once the well is inserted, install the thermistors. Insert the therm-
istor into the well until the o-ring reaches the well body. Use the
nut on the thermistor to secure the thermistor in place. Once the
thermistor is in place, it is recommended that a thermistor wire
loop be made and secured with a wire tie to the chilled water pipe.
See Fig. 60.
For dual chiller control a CCN bus must be connected between the
two modules (Fig. 59). See the Carrier Comfort Network Commu-
nication Bus Wiring section for additional information.
(+) (COM) (-) SHIELD
CCN
CCN
2.315 in.
a30-3999
THERMISTOR WIRE
TO CHILLED WATER PIPE
157
/ in. NPT fitting for securing the well in
1
4
(+) (COM) (-) SHIELD
CCN
LEN CCN
INSERT THERMISTOR UNTIL
O-RING MEETS THE
THERMISTOR WELL BODY.
WIRE TIE
LOOP
AND SECURE
TO NEXT
DEVICE
a30-4000