Carrier 30RY/RYH, 30RA/RH Electrical supply to boards, Light emitting diodes on boards, Sensors

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3 - HARDWARE DESCRIPTION

3.1 - General

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Legend

1CCN connector

2Red LED, status of the board

3Green LED, communication bus SIO

4Orange LED, communication bus CCN

5Remote master board customer control connection contacts

6Remote slave board customer control connection contacts

7Master board customer connection relay outputs

8Slave board customer connection relay outputs

9Master NRCP basic board

10Slave NRCP basic board

The control system consists of an NRCP-BASE board for single-circuit units and two NRCP-BASE boards (a master and a slave board) for dual-circuit units. Heat pump units equipped with optional additional heater stages use an additional board, type PD-AUX. All boards communicate via an internal SIO bus. The NRCP-BASE boards continuously manage the information received from the various pressure and temperature probes. The NRCP-BASE master board incorporates the program that controls the unit.

The user interface consists of two display blocks with up to 26 LEDs and 16 buttons (according to unit type). It is connected to the main basic board and gives access to a full array of control parameters.

3.2 - Electrical supply to boards

All boards, except the PD-RCPM board, are supplied from a common 24 V a.c. supply referred to earth.

CAUTION: Maintain the correct polarity when connecting the power supply to the boards, otherwise the boards may be damaged.

In the event of a power supply interrupt, the unit restarts automatically without the need for an external command. However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or unit from restarting.

3.3 - Light emitting diodes on boards

All boards continuously check and indicate the proper operation of their electronic circuits. A light emitting diode (LED) lights on each board when it is operating properly.

•The red LED flashing for a 2 second period on the NRCP- BASE board indicates correct operation. A different rate indicates a board or a software failure.

•On dual-circuit units or units equipped with optional board, the green LED flashes continuously on all boards to show that the board is communicating correctly over its internal bus. If the LED is not flashing, this indicates a SIO bus wiring problem.

•The orange LED of the master board flashes during any communication via the CCN bus.

3.4 - The sensors

Pressure sensors

Two types of electronic sensors are used to measure the suction and discharge pressure in each circuit.

Thermistors

The evaporator water sensors are installed in the entering and leaving side. The outdoor temperature sensor is mounted below the control box. An optional water system temperature sensor can be used for master/slave assembly control (in the case of leaving water control).

In heat pump units a sensor placed on an air heat exchanger pipe ensures defrost operation.

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Contents 30RA/RH B 30RY/RYH B PRO-DIALOG Control Operation and maintenance instructionsTable of Contents Safety Considerations PRO-DIALOG Control Operation Avoid electrocution GeneralAbbreviations used Following abbreviations are used frequentlyLight emitting diodes on boards Electrical supply to boardsSensors Pressure sensorsConnections at the users terminal block ControlsNRCP-BASE CCN DUAL-CIRCUIT UnitsBase OFF Volt-free contact on/off/cooling/heating with multiplexingMain interface Local interface general featuresMain Interface Button Name Description Not available on the PRO-DIALOG Junior interfaceUnit start/stop control Stopping the unit in local modeDescription Starting unit and selecting an operating typeMenus Modifying the value of a parameter/access to a sub- menuSelecting a menu Selecting a menu itemExpand display Menu Active alarm code Historic alarm Active alarm code Historic alarm codeMenu tree structure SUB-MENUInformation Menu Format Units Description Description of the Information menuFormat Units Description Information MenuDescription of the Setpoints menu Temperatures Menu Format Units CommentsPressures Menu Format Units Comments Setpoints Menu Format Units Range CommentsEntering Water Temperature Control Leaving Water Temperature Control Setpoint CReset Thresholds in Cooling or Heating Mode Description of the Inputs menuOutputs Status & Tests Menu 2 Format Units Description Description of the Outputs/Tests menu GeneralMenu description Automatic tests Manual testsOutputs Status & Tests Menu 2 Additional heating stage statusTest Number Description Confirmation Test Fault Description Description of the configuration menu GeneralPassword SUB-MENU Holiday Configuration SUB-MENU Period ConfigurationUser 1 Configuration SUB-MENU Format Units Default Comments Description of the User 1 Configuration sub-menuDate & Time Configuration SUB-MENU Format Comments Description of the User 2 Configuration sub-menuDescription of Date and Time configuration sub Menu Description of the Holidays sub-menus Typical timer programItem # Format Comments Broadcast Configuration SUB-MENUDescription of the Broadcast sub-menu Description of the Alarms History menu Description of the Alarms menuRuntime menu description Description of the Runtimes 1 menuDescription of Runtimes 2 menu Maintenance menu descriptionStart/stop control Item # Format Units DescriptionCCN Heating/cooling/standby operationHeating/cooling/auto selection Control interlock contact Evaporator water pump controlEvaporator antifreeze protection Control pointHeating setpoint Cooling setpointNight mode Reset example in cooling mode ResetDemand limit Capacity controlDefrost function Master/slave assemblyAdditional electric heater stage control Control of a boilerResetting alarms Displaying alarmsAlarm codes Then, 2 ALArM Then, no ALArMAlarm Code Descriptions

30RY/RYH, 30RA/RH specifications

The Carrier 30RY/RYH and 30RA/RH chiller models are leading solutions in commercial and industrial cooling applications. Renowned for their reliability, efficiency, and advanced technologies, these chillers cater to a wide variety of settings, from office buildings to manufacturing facilities.

The 30RY/RYH series features a distinctive design optimized for performance, utilizing a centrifugal compressor that ensures smooth operation under varying loads. One of the standout features of these chillers is their high-efficiency capabilities, which contribute to lower energy consumption. The models are engineered to deliver substantial energy savings, meeting or exceeding the latest ASHRAE and DOE efficiency standards.

A significant aspect of the 30RY and 30RA models is their use of environmentally friendly refrigerants. The 30RYH, for instance, employs R-134a refrigerant, which is designed to minimize ozone depletion while maximizing efficiency. This commitment to sustainability aligns with modern environmental regulations and practices, making these chillers a wise choice for eco-conscious projects.

In terms of control technology, the chiller models come equipped with advanced microprocessor-based controls, providing users with optimal system management and diagnostics. This integrated control system enhances the overall performance and reliability of the chillers, allowing for real-time monitoring and adjustment to ensure peak operational efficiency.

Another key feature is the quiet operation of the 30RY/RYH and 30RA/RH series. Designed with sound attenuation in mind, these units minimize noise pollution, making them suitable for installations in noise-sensitive environments. Additionally, the modular design allows for easy installation and maintenance, reducing downtime and providing flexibility in system design.

Both series also offer robust thermal performance, with the capability to handle a wide range of operating conditions. The chillers excel in terms of cooling capacity, providing solutions for varying thermal loads while maintaining energy efficiency. This adaptability is invaluable for facilities managing seasonal changes in cooling demands.

In summary, the Carrier 30RY/RYH and 30RA/RH chillers represent an ideal blend of efficiency, advanced technology, and eco-friendliness. Their high-performance capabilities, user-friendly controls, and sustainable design make them a top choice for commercial and industrial applications, ensuring dependable cooling solutions for diverse environments.
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