Enable-Off-Remote Contact Switch (SW1) —

This switch is installed in all units and provides the owner and service person with a local means of enabling or disabling the machine. It is a 3-position switch and it is used to control the chiller. When switched to the Enable position, the chiller will be under its own control. When switched to the Off position, the chiller will shut down. When switched to the Remote Con- tact position, a field-installed dry contact can be used to start the chiller. The contacts must be capable of handling a 24-vac, 50-mA load. In the Enable and Remote Contact (dry contacts closed) positions, the chiller is allowed to operate and respond to the scheduling configuration, CCN configuration, and set point data.

For units with a Touch Pilot™ display, the position of the Enable/Off/Remote contact switch is ignored except when the Remote Mode operating type is selected. Refer to the Machine Control Methods section on page 20 for more details.

Emergency On/Off Switch (SW2) — This switch is installed in all units. The Emergency On/Off switch should only be used when it is required to shut the chiller off immedi- ately. Power to all modules is interrupted when this switch is off and all outputs from these modules will be turned off.

Energy Management Module (EMM) — The EMM is available as a factory-installed option or as a field-installed accessory. See Fig. 12. The EMM receives 4 to 20 mA inputs for the temperature reset, cooling set point and demand limit functions. The EMM also receives the switch inputs for the field-installed second stage 2-step demand limit and ice done functions. The EMM communicates the status of all inputs with the MBB, and the MBB adjusts the control point, capacity limit, and other functions according to the inputs received. See Table 9.

CAUTION

Care should be taken when interfacing with other manufac- turer’s control systems due to possible power supply differ- ences, full wave bridge versus half wave rectification, which could lead to equipment damage. The two different power supplies cannot be mixed. ComfortLink™ controls use half wave rectification. A signal isolation device should be utilized if incorporating a full wave bridge rectifier sig- nal generating device is used.

J9B J9A

221

221

221

221

100K

100K

-

G +

-

G +

LEN IOS

LEN IOS

 

 

 

7

 

100K

 

CH

 

 

 

100K

CH 5CH 6

J8

J7B

100K

CH CH CH CH CH 15 1 2 3 4

CH 14

CH 13

CH 12

J7A

J6

12

24

11

VAC

CH 11b

J5

CH

CH CH

CH

CH

CH

CH

CH

CH

CH

 

17

16

17

18

19

20

21

22

23

J1 J2A

J2B

J3

J4

Fig. 12 — Energy Management Module

a30-4911

16

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Image 16
Carrier 30XW150-400 specifications Enable-Off-Remote Contact Switch SW1, Energy Management Module

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.

In terms of reliability, the Carrier 30XW150-400 series features robust construction and an array of safety and monitoring systems. The units come with advanced diagnostics that help in quickly identifying and addressing any operational issues. This proactive approach ensures reliability and minimizes downtime, which is crucial for maintaining optimal temperature controls in critical environments.

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.