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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.
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.
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.
Table 45 — Thermistor Identification
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.
THERMISTOR ID
DESCRIPTION
RESISTANCE AT 77 F (25 C)
CONNECTION POINT
EWT
Entering Water Thermistor
5k
MBB-J6-CH2
LWT
Leaving Water Thermistor
5k
MBB-J6-CH1
OAT
Outdoor Air Thermistor
5k
MBB-J6-CH4
SGTA
Circuit A Suction Gas Thermistor
5k
EXV1-J3-A, THA
SGTB
Circuit B Suction Gas Thermistor
5k
EXV1-J3-B, THB
SGTC
Circuit C Suction Gas Thermistor
5k
EXV2-J3-A, THA
DUAL
Dual Chiller LWT Thermistor
5k
MBB-J6-CH3
SPT
Space Temperature Thermistor
10k
EMM-J6-CH2
O-RING
BRASS NUT 3/8 - 24 FOR
ASSEMBLY ON BRASS WELL
6" MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
1.188 in.
2.315 in.
1/4-18 NPT
Fig. 34 — 5K Thermistor (P/N 30RB660036)
Fig. 35 — Entering and Leaving Dual Water Thermistor Well (P/N 00PPG000008000A)
Summary of Contents for AQUASNAP 30RBA315
Page 77: ...77 Fig 37 Control Schematic 30RB060 080 a30 4619...
Page 78: ...78 Fig 38 Control Schematic 30RB090 150 a30 4620...
Page 79: ...79 Fig 39 Control Schematic 30RB160 190 a30 4622...
Page 80: ...80 Fig 40 Control Schematic 30RB210 300 a30 4622...
Page 81: ...81 Fig 41 Heat Reclaim Control Schematic a30 4622...