Table 3 — Main Base Board Inputs and Outputs

DESCRIPTION

INPUT/OUTPUT

I/O TYPE

DISPLAY MODULE POINT NAME

CONNECTION POINT

Pin

 

Notation

 

 

 

 

 

 

 

 

 

MBB-J1, MBB-J1A,

Power (24 vac supply)

 

 

MBB-J1B

11

 

24 vac

 

 

 

 

 

 

 

 

 

12

 

Ground

 

 

 

 

MBB-J9A, MBB-J9B,

 

 

 

 

MBB-J9C, MBBJ9D

Local Equipment Network

+

 

RS485 Port (D+)

 

 

 

 

G

 

RS485 Port (Gnd)

 

 

 

 

-

 

RS485 Port (D-)

 

 

 

 

 

 

MBB-J12

Carrier Communication

+

 

RS485 Port (D+)

Network

G

 

RS485 Port (Gnd)

 

 

 

 

 

 

 

 

-

 

RS485 Port (D-)

Chilled Water Flow Switch

CWFS

Switch

Cooler Flow Switch, LOCK

 

MBB-J5B-CH17

17

 

 

 

 

 

 

 

 

Demand Limit Switch No. 1

Demand Limit SW1

Switch

Limit Switch 1 Status, DLS1

 

 

MBB-J4-CH13

Condenser Flow Switch

CDFS

Switch

Condenser Flow Switch, COND

16A

 

MBB-J5A-CH16A

 

 

 

 

 

 

MBB-J7A-CH6

Circuit A Discharge

DPTA

Pressure Transducer

Discharge Pressure, DP.A

5V

 

+5 vdc Ref.

Pressure Transducer

S

 

Signal

 

 

 

 

 

 

 

 

R

 

Return

 

 

 

 

 

 

MBB-J7C-CH8

Circuit B Discharge

DPTB

Pressure Transducer

Discharge Pressure, DP.B

5V

 

+5 vdc Ref.

Pressure Transducer

S

 

Signal

 

 

 

 

 

 

 

 

R

 

Return

Dual Chiller

DUAL

5k Thermistor

CHWS Temperature, CHWS

 

 

MBB-J6-CH3

LWT Thermistor

 

 

 

 

 

 

 

 

Dual Set Point Input

Dual Set Point

Switch

Remote Setpoint Switch, DUAL

 

 

MBB-J4-CH12

Heat/Cool Switch

HC_SW

Switch

Heat/Cool Select Contact, HC_SW

 

 

MBB-J4-CH14

Entering Water Thermistor

EWT

5k Thermistor

Cooler Entering Fluid, EWT

 

 

MBB-J6-CH2

Leaving Water Thermistor

LWT

5k Thermistor

Cooler Leaving Fluid, LWT

 

 

MBB-J6-CH1

Condenser Entering Water

CEWT

5k Thermistor

Condenser Entering Fluid, CEWT

 

 

MBB-J6-CH5

Thermistor

 

 

 

 

 

 

 

 

Condenser Leaving Water

CLWT

5k Thermistor

Condenser Leaving Fluid, CLWT

 

 

MBB-J6-CH4

Thermistor

 

 

 

 

 

 

 

 

External Chilled

PMPI

Switch

Electrical Box Interlock, ELEC

 

MBB-J4-CH15A

Water Pump Interlock

 

 

 

 

 

 

 

 

 

 

 

 

 

MBB-J7B-CH7

Circuit A Suction

SPTA

Pressure Transducer

Suction Pressure, SP.A

5V

 

+5 vdc Ref.

Pressure Transducer

S

 

Signal

 

 

 

 

 

 

 

 

R

 

Return

 

 

 

 

 

 

MBB-J7D-CH9

Circuit B Suction

SPTB

Pressure Transducer

Suction Pressure, SP.B

5V

 

+5 vdc Ref.

Pressure Transducer

S

 

Signal

 

 

 

 

 

 

 

 

R

 

Return

Unit Status

Remote Contact-Off-Enable

Switch

On/Off Remote Switch, ONOF

 

 

MBB-J4-CH11

Alarm Relay

ALM R

Relay

Alarm Relay Output, ALRM

 

 

MBB-J3-CH24

Alert Relay

ALT R

Relay

Alert Relay Output, ALRT

 

 

MBB-J3-CH25

Cooler Pump Relay 1

PMP1

Contactor

Cooler Pump 1, CPUMP_1

 

MBB-J2A-CH19

Cooler Pump Relay 2

PMP2

Contactor

Cooler Pump 2, CPUMP_2

 

MBB-J2A-CH20

Condenser Pump Relay

CPMP

Contactor

Condenser Pump, COND_PMP

 

MBB-J2C-CH22

Pump #1 Interlock

PMP_1

Switch

Cooler Pump Run Status, PUMP

 

MBB-J5C-CH18

Pump #2 Interlock

PMP_2

 

 

 

 

 

 

LEGEND

I/O — Input or Output

LWT — Leaving Water Temperature

Compressor Protection Module (CPM) — There is one CPM per compressor. See Fig. 9. The device controls the compressor contactors, oil solenoid, and loading/unloading the solenoid. The CPM also monitors the compressor motor tem- perature, high pressure switch, oil level switch, discharge gas temperature, oil pressure transducer, motor current, MTA (must trip amps) setting and economizer pressure transducer (sizes 175,200,350,400 only). The CPM responds to com- mands from the MBB (Main Base Board) and sends the MBB the results of the channels it monitors via the LEN (Local

Equipment Network). The CPM has three DIP switch input banks, Switch 1 (S1), Switch 2 (S2), and Switch 3 (S3). The CPM board DIP switch (S1) configures the board for the type of starter, the location and type of the current transformers and contactor failure instructions. See Table 4 for description of DIP switch 1 (S1) inputs. See Appendix D for DIP switch settings.

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Carrier 30XW150-400 specifications Main Base Board Inputs and Outputs

30XW150-400 specifications

The Carrier 30XW150-400 series is a line of water-cooled chillers that exemplifies innovation, efficiency, and reliability in commercial cooling solutions. Designed for medium to large-scale applications, this series is ideal for a variety of settings, including commercial buildings, industrial processes, and chilled water systems.

One of the standout features of the Carrier 30XW series is its efficiency. The chillers utilize advanced variable-speed compressor technology, which allows the units to adapt to varying cooling loads while minimizing energy consumption. This technology not only reduces operational costs but also contributes to better environmental sustainability by lowering greenhouse gas emissions.

The 30XW series chillers are equipped with high-efficiency, scroll compressors that operate quietly and provide significant energy savings. By utilizing enhanced economizer controls, these units can achieve higher efficiency ratings, especially in part-load conditions. The result is an impressive Energy Efficiency Ratio (EER) and Seasonal Energy Efficiency Ratio (SEER), making these units a smart choice for energy-conscious businesses.

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Additionally, the chillers incorporate environmentally friendly refrigerants that comply with the latest regulations, making them a sustainable choice for modern commercial applications. Their compact design allows for flexible installation options, and the integrated control systems provide the ability to optimize performance based on specific building management demands.

User-friendly interfaces and remote monitoring capabilities further enhance the ease of operation, allowing facility managers to have real-time insight into performance metrics and system health. This level of control contributes to better maintenance planning and maximizes the lifespan of the equipment.

In summary, the Carrier 30XW150-400 series of water-cooled chillers combines advanced technology, energy efficiency, and reliable performance, making it an ideal solution for various commercial and industrial cooling needs. With its commitment to innovation and sustainability, Carrier continues to set the standard in the HVAC industry.