tacts include a Remote Mode Ready T

tacts include a Remote Mode Ready To Start, a Cycling Shutdown, a Safety Shutdown and a chiller Run Con- tact. Pressure transducers sense system pressures and thermistors sense system temperatures. The output of each transducer is a DC voltage that is analogous to the pressure input. The output of each thermistor is a DC voltage that is analogous to the temperature it is sensing.

Setpoints can be changed from a remote location via 0-10VDC, 4-20mA, contact closures or through serial communications. The adjustable remote reset range [up to 20°F (11.1°C)] provides flexible, efficient use of remote signal depending on reset needs. Serial data interface to the YORK ISN Building Automation System (BAS) is through the micro gateway, which can be mounted inside the Control Center.

This printed circuit board requests the required data from the Micro Board and makes it available for the YORK ISN network. This optional board is available through the YORK BAS group. The operating program is stored in non-volatile memory (EPROM) to eliminate chiller failure due to AC power failure/battery discharge. Programmed setpoints are retained in lithium battery-backed RTC memory for 11 years minimum.

Thermal ice storage systems are based on the concept of using off-peak, lower cost electricity to build ice for handling the cooling load during peak hours. The most efficient way to build ice is to maximize chiller load and minimize run time. Standard chiller control systems are not designed for this operating mode. In a typical appli- cation, chillers will load and unload to maintain a leav- ing chilled liquid setpoint. When the YORK YR chiller operates in the thermal storage control mode, the unit will remain at 100% load until the setpoint shutdown tem- perature is reached. To add greater operating flexibility and eliminate unnecessary chiller cycling, two different Low Water (Liquid) Temperature Restart Thresholds can be programmed, one for the ice mode and one for the standard cooling mode. This control enhancement is standard on all YR chillers. The chiller can also be left in the standard control mode for temperatures ranging between 20 and 70°F (-6.7 and 21.1°C), for applications involving a process or comfort cooling duty that requires leaving chilled liquid temperature setpoint control.

When power is applied to the chiller, the HOME screen is displayed. This screen displays a visual representation of the chiller and a collection of data detailing important operations and parameters. When the chiller is running, the flow of chilled liquid is animated by the alternating shades of color moving in and out of the pipe nozzles. The primary values that need to be monitored and con- trolled are shown on this screen. They are as follows:


Display Only:
• Chilled Liquid Temperature – Leaving
• Chilled Liquid Temperature – Return
• Condenser Liquid Temperature – Return
• Condenser Liquid Temperature – Leaving
• Motor Run (LED)
• % Full-load Amps
• Operating Hours

With the “soft” keys the operator is only one touch away from the 8 main screens that allow access to the major information and components of the chiller. The 8 screens are the SYSTEM, EVAPORATOR, CONDENSER, COMPRESSOR, OIL SEPARATOR, MOTOR, SET-
POINTS, and the HISTORY. Also on the Home Screen is the ability to Log IN, Log OUT and Print. Log In and Log Out is the means by which different security levels are accessed.

The SYSTEM screen gives a general overview of com- mon chiller parameters for both shells. This is an end view of the chiller with a 3-D cutaway of both the shells. The following can be viewed from this screen:

Display Only:
• Discharge Temperature
• Chilled Liquid Temperature – Leaving
• Chilled Liquid Temperature – Return
• Chilled Liquid Temperature – Setpoint
• Evaporator Pressure
• Evaporator Saturation Temperature
• Condenser Liquid Temperature – Leaving
• Condenser Liquid Temperature – Return
• Condenser Pressure
• Condenser Saturation Temperature
• Oil Temperature
• Differential Oil Pressure
• % Full-load Amps
• Current Limit

The EVAPORATOR screen displays a cutaway view of the chiller evaporator. All setpoints relating to the evapo- rator side of the chiller are maintained on this screen. Animation of the evaporation process indicates whether the chiller is presently in RUN condition (bubbling) and liquid flow in the pipes is indicated by alternating shades of color moving in and out of the pipes. Adjustable limits on the low water temperature setpoints allow the chiller to cycle on and off for greater efficiency and less chiller cycling. The chiller cycles off when the leaving chilled water temperature is below setpoint and is adjustable



from 1°F (0.55°C) below to a minimum of 38°F (2.22°C). Restart is adjustable from setpoint up to a max. of 80°F (26.6°C). The Panel will check for flow to avoid freeze-up of the tubes. If flow is interrupted, shutdown will occur after a minimum of two seconds. The following can also be performed through this

Kết quả (Việt) 1:

tacts bao gồm một từ xa chế độ sẵn sàng để bắt đầu, tắt máy chạy xe đạp, một Shutdown an toàn và một chiller chạy Con - tact. Cảm biến áp lực cảm nhận hệ thống áp lực và thermistors cảm nhận nhiệt độ hệ thống. Sản lượng của mỗi bộ biến là một điện áp DC mà là tương tự với những áp lực đầu vào. Sản lượng của mỗi thermistor là một điện áp DC mà là tương tự như nhiệt độ mà nó cảm biến.Setpoints có thể được thay đổi từ một vị trí từ xa thông qua 0-10VDC, 4-20mA, đóng cửa liên lạc hoặc thông qua giao tiếp nối tiếp. Điều khiển từ xa điều chỉnh thiết lập lại phạm vi cung cấp [lên đến 20° F (11,1 ° C)] RMIT, efficient sử dụng của các tín hiệu từ xa tùy thuộc vào nhu cầu thiết lập lại. Giao diện nối tiếp dữ liệu để các YORK ISN xây dựng tự động hóa hệ thống (BAS) là thông qua các cửa ngõ nhỏ, có thể được gắn bên trong Trung tâm điều khiển.Bảng mạch in này yêu cầu dữ liệu yêu cầu từ hội đồng quản trị Micro và làm cho nó có sẵn cho mạng YORK ISN. Bảng tùy chọn này có sẵn thông qua nhóm YORK BAS. Chương trình điều hành được lưu trữ trong bộ nhớ không bay hơi (EPROM) để loại bỏ chiller thất bại do AC power thất bại/pin xả. Setpoints được lập trình được giữ lại trong bộ nhớ RTC lưng pin lithium trong 11 năm tối thiểu.Thermal ice storage systems are based on the concept of using off-peak, lower cost electricity to build ice for handling the cooling load during peak hours. The most efficient way to build ice is to maximize chiller load and minimize run time. Standard chiller control systems are not designed for this operating mode. In a typical appli- cation, chillers will load and unload to maintain a leav- ing chilled liquid setpoint. When the YORK YR chiller operates in the thermal storage control mode, the unit will remain at 100% load until the setpoint shutdown tem- perature is reached. To add greater operating flexibility and eliminate unnecessary chiller cycling, two different Low Water (Liquid) Temperature Restart Thresholds can be programmed, one for the ice mode and one for the standard cooling mode. This control enhancement is standard on all YR chillers. The chiller can also be left in the standard control mode for temperatures ranging between 20 and 70°F (-6.7 and 21.1°C), for applications involving a process or comfort cooling duty that requires leaving chilled liquid temperature setpoint control.When power is applied to the chiller, the HOME screen is displayed. This screen displays a visual representation of the chiller and a collection of data detailing important operations and parameters. When the chiller is running, the flow of chilled liquid is animated by the alternating shades of color moving in and out of the pipe nozzles. The primary values that need to be monitored and con- trolled are shown on this screen. They are as follows: Display Only:• Chilled Liquid Temperature – Leaving• Chilled Liquid Temperature – Return• Condenser Liquid Temperature – Return• Condenser Liquid Temperature – Leaving• Motor Run (LED)• % Full-load Amps• Operating HoursWith the “soft” keys the operator is only one touch away from the 8 main screens that allow access to the major information and components of the chiller. The 8 screens are the SYSTEM, EVAPORATOR, CONDENSER, COMPRESSOR, OIL SEPARATOR, MOTOR, SET-POINTS, and the HISTORY. Also on the Home Screen is the ability to Log IN, Log OUT and Print. Log In and Log Out is the means by which different security levels are accessed.The SYSTEM screen gives a general overview of com- mon chiller parameters for both shells. This is an end view of the chiller with a 3-D cutaway of both the shells. The following can be viewed from this screen:Display Only:• Discharge Temperature• Chilled Liquid Temperature – Leaving• Chilled Liquid Temperature – Return• Chilled Liquid Temperature – Setpoint• Evaporator Pressure• Evaporator Saturation Temperature• Condenser Liquid Temperature – Leaving• Condenser Liquid Temperature – Return• Condenser Pressure• Condenser Saturation Temperature• Oil Temperature• Differential Oil Pressure• % Full-load Amps• Current LimitThe EVAPORATOR screen displays a cutaway view of the chiller evaporator. All setpoints relating to the evapo- rator side of the chiller are maintained on this screen. Animation of the evaporation process indicates whether the chiller is presently in RUN condition (bubbling) and liquid flow in the pipes is indicated by alternating shades of color moving in and out of the pipes. Adjustable limits on the low water temperature setpoints allow the chiller to cycle on and off for greater efficiency and less chiller cycling. The chiller cycles off when the leaving chilled water temperature is below setpoint and is adjustable


from 1°F (0.55°C) below to a minimum of 38°F (2.22°C). Restart is adjustable from setpoint up to a max. of 80°F (26.6°C). The Panel will check for flow to avoid freeze-up of the tubes. If flow is interrupted, shutdown will occur after a minimum of two seconds. The following can also be performed through this