6
Table 3 — Thermistor and Transducer Locations
*30HX206-271 and 30GXN,R204-350, 370-528 only.
†30GXN,R281-350 only.
**Sensors are available as accessories for field installation (30HXC only).
THERMISTORS
Sensor Description Location Connection Terminals
T1 Cooler Leaving Fluid Temp Cooler Head Leaving Fluid Side MBB, J8-13,14
T2 Cooler Entering Fluid Temp Cooler Head Entering Fluid Side MBB, J8-11,12
Motor Temp A1 Motor Temperature A1 Compressor A1 Junction Box CCP1, plug J5
Motor Temp A2* Motor Temperature A2 Compressor A2 Junction Box CCP2, plug J5
Motor Temp B1 Motor Temperature B1 Compressor B1 Junction Box CCP1, plug J9
Motor Temp B2† Motor Temperature B2 Compressor B2 Junction Box CCP2, plug J9
T5 Discharge Gas Temp Comp A1 Top of Comp A1 Discharge Line EXV, J5-11,12
T6 Discharge Gas Temp Comp B1 Top of Comp B1 Discharge Line EXV, J5-9,10
T3* Discharge Gas Temp Comp A2 Top of Comp A2 Discharge Line EXV, J5-7,8
T4† Discharge Gas Temp Comp B2 Top of Comp B2 Discharge Line EXV, J5-5,6
T9 (optional)** Outdoor Air Thermistor/Dual LWT Outside Air Stream/Common Leaving Fluid TB5, terminals 7,8
T10 (optional)** Space Temperature Conditioned Space TB5, terminals 5,6
COND EWT (optional)** Condenser Entering Water Thermistor Condenser Entering Fluid Line TB2, terminals 1,2
COND LWT (optional)** Condenser Leaving Water Thermistor Condenser Leaving Fluid Line TB2, terminals 3,4
PRESSURE TRANSDUCERS
Sensor Description Location Connection Terminals
DPT-A Discharge Pressure Circuit A Top of Condenser Separator Circuit A MBB, J8-21,22,23
SPT-A Suction Pressure Circuit A Top of Cooler Circuit A MBB, J8-24,25,26
EPT-A Economizer Pressure Circuit A Economizer Line Entering Comp A SCB, J5-7,8,9
OPT-A1 Oil Pressure Compressor A1 Compressor A1 Oil Connection SCB, J5-4,5,6
OPT-A2* Oil Pressure Compressor A2 Compressor A2 Oil Connection SCB, J5-1,2,3
DPT-B Discharge Pressure Circuit B Top of Oil Separator Circuit B MBB, J8-15,16,17
SPT-B Suction Pressure Circuit B Top of Cooler Circuit B MBB, J8-18,19,20
EPT-B Economizer Pressure Circuit B Economizer Line Entering Comp B SCB, J6-7,8,9
OPT-B1 Oil Pressure Compressor B1 Compressor B1 Oil Connection SCB, J6-4,5,6
OPT-B2† Oil Pressure Compressor B2 Compressor B1 Oil Connection SCB, J6-1,2,3
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