Carrier AQUASNAP 30RB060-390 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 72

OUTDOOR AIR TEMPERATURE — This sensor is factory-
installed and is attached to the bottom of the condenser mount-
ing rail.
REMOTE SPACE TEMPERATURE — This sensor (part
no. 33ZCT55SPT) is a field-installed accessory mounted in the
indoor space and is used for water temperature reset. The
sensor should be installed as a wall-mounted thermostat would
be (in the conditioned space where it will not be subjected to
either a cooling or heating source or direct exposure to sun-
light, and 4 to 5 ft above the floor).
Space temperature sensor wires are to be connected to
terminals in the unit main control box. See Fig. 36. The space
temperature sensor includes a terminal block (SEN) and a RJ11
female connector. The RJ11 connector is used access into
the Carrier Comfort Network (CCN) at the sensor.
To connect the space temperature sensor (see Fig. 36):
1. Using a 20 AWG twisted pair conductor cable rated for
the application, connect one wire of the twisted pair to
one SEN terminal and connect the other wire to the other
SEN terminal located under the cover of the space
temperature sensor.
2. Connect the other ends of the wires to terminals 7 and 8
on TB6 located in the unit control box.
THERMISTOR ID
EWT Entering Water Thermistor
LWT Leaving Water Thermistor
OAT Outdoor Air Thermistor
SGTA Circuit A Suction Gas Thermistor
SGTB Circuit B Suction Gas Thermistor
SGTC Circuit C Suction Gas Thermistor
DUAL Dual Chiller LWT Thermistor
SPT Space Temperature Thermistor
Fig. 35 — Entering and Leaving Dual Water Thermistor Well (P/N 00PPG000008000A)
Table 45 — Thermistor Identification
DESCRIPTION
O-RING
Fig. 34 — 5K Thermistor (P/N 30RB660036)
6" MINIMUM
1.188 in.
CLEARANCE FOR
THERMISTOR
REMOVAL
72
Units on the CCN can be monitored from the space at the
sensor through the RJ11 connector, if desired. To wire the RJ11
connector into the CCN:
1. Cut the CCN wire and strip ends of the red (+), white
(ground), and black (–) conductors. (If another wire color
scheme is used, strip ends of appropriate wires.)
2. Insert and secure the red (+) wire to terminal 5 of the
space temperature sensor terminal block.
3. Insert and secure the white (ground) wire to terminal 4 of
the space temperature sensor.
4. Insert and secure the black (–) wire to terminal 2 of the
space temperature sensor.
IMPORTANT: The cable selected for the RJ11
connector wiring MUST be identical to the CCN
communication bus wire used for the entire network.
Refer to Table 12 for acceptable wiring.
5. Connect the other end of the communication bus cable to
the remainder of the CCN communication bus.
NOTE: The energy management module (EMM) is required
for this accessory.
RESISTANCE AT 77 F (25 C)
5k 
5k 
5k 
5k 
5k 
5k 
5k 
10k 
BRASS NUT 3/8 - 24 FOR
ASSEMBLY ON BRASS WELL
1/4-18 NPT
2.315 in.
CONNECTION POINT
MBB-J6-CH2
MBB-J6-CH1
MBB-J6-CH4
EXV1-J3-A, THA
EXV1-J3-B, THB
EXV2-J3-A, THA
MBB-J6-CH3
EMM-J6-CH2