Specifications

7
Table 2 — Thermistor and Transducer Designations
SENSOR
PIN
CONNECTION
POINT
FUNCTION AND LOCATION PART NO.
Thermistors
OAT
J8 — 5,6 (MBB) Outside Air Temperature (OAT) — Attached to the economizer support bracket, behind
the control box, inside the outside air duct of the economizer.
HH79NZ016
SAT
J8 — 7,8 (MBB) Supply Air Temperature (SAT) — Inserted into the heat section underneath the indoor
fan motor
HH79NZ079
SCT_A
J8 — 9,10 (MBB) Saturated Condensing Temperature for Cir. A (SCT_A) — Circuit A condenser hairpin
HH79NZ013
SCT_B
J8 — 11,12 (MBB) Saturated Condensing Temperature for Cir. B (SCT_B) — Circuit B condenser hairpin
SCT_C
J8 — 13,14 (MBB) Saturated Condensing Temperature for Cir. C (SCT_C) — Circuit C condenser hairpin
Transducers
SSP_A
J8 — 18,19,20 (MBB) Saturated Suction Pressure for Cir. A (SSP_A) — Suction line of Circuit A in
compressor compartment
HK05YZ001
SSP_B
J8 — 21,22,23 (MBB) Saturated Suction Pressure for Cir. B (SSP_B) — Suction line of Circuit B in
compressor compartment
SSP_C
J8 — 24,25,26 (MBB) Saturated Suction Pressure for Cir. C (SSP_C) — Suction line of Circuit C in
compressor compartment
CEPL130346-01
STATUS
LEN
J1
J2
J4
J3
J5
J6
J7
J8
J9
J10
CCN
RED LED - STATUS GREEN LED -
LEN (LOCAL EQUIPMENT NETWORK)
YELLOW LED -
CCN (CARRIER COMFORT NETWORK)
INSTANCE JUMPER
Fig. 5 — Main Base Board