Carrier 48HG014 - Page 7

7
Table 2 — Thermistor and Transducer Designations
SENSOR
PIN
CONNECTION
POINT
FUNCTION AND LOCATION PART NO.
Thermistors
OAT
(T1)
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
(T2)
J8 — 7,8 (MBB) Supply Air Temperature (SAT) — Inserted into the heat section under-
neath the indoor fan motor
HH79NZ079 (48HG Units)
HH79NZ084 (50HG Units)
SCT_A
(T3)
J8 — 9,10 (MBB) Saturated Condensing Temperature for Cir. A (SCT_A) — Circuit A
condenser hairpin
HH79NZ003
SCT_B
(T4)
J8 — 11,12 (MBB) Saturated Condensing Temperature for Cir. B (SCT_B) — Circuit B
condenser hairpin
SCT_C
(T5)
J8 — 13,14 (MBB) Saturated Condensing Temperature for Cir. C (SCT_C) — Circuit C
condenser hairpin
Transducers
SSP_A
(T6)
J8 — 18,19,20 (MBB) Saturated Suction Pressure for Cir. A (SSP_A) — Suction line of Circuit A
in compressor compartment
HK05YZ001
SSP_B
(T7)
J8 — 21,22,23 (MBB) Saturated Suction Pressure for Cir. B (SSP_B) — Suction line of Circuit B
in compressor compartment
SSP_C
(T8)
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