Carrier 30RA/RH, 30RY/RYH Unit start/stop control, Description, Stopping the unit in local mode

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The summary interface (right hand section) includes a mimic diagram of the unit, together with push-buttons and LEDs. It gives quick access to the main operating parameters of the unit.

SUMMARY INTERFACE LEDs*

LED

INDICATION WHEN LIT

 

Green LED:

 

The unit is authorised to start or is already running

 

Red LED:

 

- Lit: circuit A or unit shut down by alarm

 

- Flashing: circuit A or unit running with alarm present

 

Red LED:

 

- Lit: circuit B or unit shut down by alarm

 

- Flashing: circuit B or unit running with alarm present

 

Red LED:

 

Water flow switch default or user safety lock open.

 

 

 

Green LED:

 

The evaporator pump is running.

 

Yellow LEDs:

 

From top to bottom - start/stop status of compressor A1, A2 and A3

 

or B1, B2 and B3. Flashing LED indicates that the circuit is in the

 

protection or defrost mode (A or B).

 

 

 

Green LED:

 

The unit operates in heating mode.

 

Green LED:

 

The unit operates in cooling mode.

* Not available on the PRO-DIALOG Junior interface.

SUMMARY INTERFACE PUSH BUTTONS*

BUTTON DISPLAY

Blue button: evaporator leaving or entering water temperature in °C

Gray button: outdoor air temperature in °C

Control point (setpoint + reset) in °C

Press 1: circuit A/B discharge pressure in kPa

Press 2: circuit A/B saturated condensing temperature in °C

Press 1: circuit A/B suction pressure in kPa

Press 2: circuit A/B saturated suction temperature in °C

Press 1: compressor A1/B1 operating hours in h/10 or h/100

Press 2: compressor A2/B2 operating hours in h/10 or h/100

Press 3: compressor A3/B3 operating hours in h/10 or h/100

* Not available on the PRO-DIALOG Junior interface.

4.2 - Unit start/stop control

4.2.1 - Description

The unit start/stop can be controlled by one of the following methods:

•Locally on the actual unit (Local control type)

•By remote control with the aid of user contacts (remote control type)

•By CCN control with the aid of the CCN (CCN control type)

The main interface includes a Start/Stop button which can be used to stop or start the unit in the local operating type or to select the remote or CCN operating type.

The available operating types are described in the following table.

The following operating types can be selected using the Start/Stop button:

OPERATING TYPES

4 DIGIT DISPLAY

DESCRIPTION

LOFF

Local Off. The unit is halted in local mode.

L-On

Local On. The unit is in local control mode and is

 

authorised to start.

L-Sc*

Local On - timer control. The unit is in local control

 

mode. It is authorised to start if the period is occupied.

 

If the timer program for unit operation is unoccupied,

 

the unit remains shut down until the period becomes

 

occupied.

CCN*

CCN. The unit is controlled by CCN commands.

rEM*

Remote. The unit is controlled by remote control

 

contacts.

MAST*

Master Unit. The unit runs as a master in a two unit

 

lead/lag arrangement. This is displayed if the unit is

 

configured for master/slave control.

Legend

*Displayed if the configuration requires it.

Section 5.1 gives a more detailed description of the commands to start/stop the unit, analysed by operating type.

4.2.2 - Stopping the unit in local mode

The unit can be stopped in local mode at any time by pressing the Start/Stop button.

TO STOP THE UNIT

BUTTON ACTION

2-DIGIT DISPLAY

4-DIGIT DISPLAY

Press the Start/Stop

C

LOFF

button for less than

 

 

4 seconds (one short

 

 

press is enough).

 

 

If the button is

t

LOFF

released, the unit stops

 

 

without the need for

 

 

further action.

 

 

4.2.3 - Starting unit and selecting an operating type

The unit can be started in local mode, or unit operating type can be changed at any time using the Start/Stop button. In the example that follows, the unit is stopped (LOFF) and the user wants to start the unit in local mode.

START UP WITH THE PREVIOUSLY USED OPERATING TYPE WHEN THE UNIT IS STOPPED IN LOCAL MODE (LOFF)

BUTTON ACTION

2-DIGIT

4-DIGIT

 

DISPLAY

DISPLAY

The unit is in local stop mode. The

 

LOFF

previously used operating type is local on

 

 

(L-ON)

 

 

Press the Start/Stop button for 4 seconds

 

L-On

(one short press-down is sufficient). L-ON

 

 

illuminates immediately. "C" flashes in the

 

 

2-digit display to show that the controller is

 

 

awaiting confirmation.

 

 

Press the Enter button to confirm the

t

L-On

operating type. "t" is displayed in the 2-digit

 

 

display to indicate the operating type

 

 

selected. If the Enter button is not pressed

 

 

soon enough, the controller will cancel the

 

 

change and remain in the stop mode.

 

 

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Contents Operation and maintenance instructions 30RA/RH B 30RY/RYH B PRO-DIALOG ControlTable of Contents Safety Considerations PRO-DIALOG Control Operation Abbreviations used GeneralAvoid electrocution Following abbreviations are used frequentlySensors Electrical supply to boardsLight emitting diodes on boards Pressure sensorsControls Connections at the users terminal blockBase DUAL-CIRCUIT UnitsNRCP-BASE CCN Volt-free contact on/off/cooling/heating with multiplexing OFFMain Interface Button Name Description Local interface general featuresMain interface Not available on the PRO-DIALOG Junior interfaceDescription Stopping the unit in local modeUnit start/stop control Starting unit and selecting an operating typeSelecting a menu Modifying the value of a parameter/access to a sub- menuMenus Selecting a menu itemExpand display Menu Menu tree structure Active alarm code Historic alarm codeActive alarm code Historic alarm SUB-MENUDescription of the Information menu Information Menu Format Units DescriptionInformation Menu Format Units DescriptionPressures Menu Format Units Comments Temperatures Menu Format Units CommentsDescription of the Setpoints menu Setpoints Menu Format Units Range CommentsReset Thresholds in Cooling or Heating Mode Leaving Water Temperature Control Setpoint CEntering Water Temperature Control Description of the Inputs menuMenu description Description of the Outputs/Tests menu GeneralOutputs Status & Tests Menu 2 Format Units Description Outputs Status & Tests Menu 2 Manual testsAutomatic tests Additional heating stage statusTest Number Description Confirmation Password Description of the configuration menu GeneralTest Fault Description SUB-MENU Period Configuration SUB-MENU Holiday ConfigurationDescription of the User 1 Configuration sub-menu User 1 Configuration SUB-MENU Format Units Default CommentsDescription of Date and Time configuration sub Menu Description of the User 2 Configuration sub-menuDate & Time Configuration SUB-MENU Format Comments Typical timer program Description of the Holidays sub-menusDescription of the Broadcast sub-menu Broadcast Configuration SUB-MENUItem # Format Comments Runtime menu description Description of the Alarms menuDescription of the Alarms History menu Description of the Runtimes 1 menuStart/stop control Maintenance menu descriptionDescription of Runtimes 2 menu Item # Format Units DescriptionHeating/cooling/auto selection Heating/cooling/standby operationCCN Evaporator antifreeze protection Evaporator water pump controlControl interlock contact Control pointCooling setpoint Heating setpointDemand limit ResetNight mode Reset example in cooling mode Capacity controlAdditional electric heater stage control Master/slave assemblyDefrost function Control of a boilerAlarm codes Displaying alarmsResetting alarms 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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