Carrier 30RA/RH, 30RY/RYH manual Controls, Connections at the users terminal block

Page 6

3.5 - The controls

Evaporator pumps

The controller can regulate one or two evaporator pumps and takes care of automatic change-over between pumps.

Evaporator heater

It protects the evaporator (and the pipe heater for units without pump) against freezing if the unit is off.

Boiler

This relay output authorises start/stop of a boiler.

Condensate defrost heater

This heater is used for heat pump units and is located at the bottom of the air heat exchanger of each circuit. It prevents ice build-up, if defrost cycles are initiated at low outdoor temperatures.

3.6 - Connections at the user's terminal block

3.6.1 - General description

The contacts below are available at the user's terminal block on the NRCP-BASE board (see figure 1). Some of them can only be used if the unit operates in remote operating type (rEM).

The following table summarises the connections at the user’s terminal block.

SINGLE-CIRCUIT UNITS

Description

Connector/channel

Terminal

Board

Remarks

Remarks

Alarm relay output

J3 / CH24

30 - 31

NRCP-BASE

Indicates alarms

Volt-free contact 24 V a.c.

Boiler relay output

J3 / CH25

37 - 38

NRCP-BASE

Boiler start/stop control output.

48 V d.c. max, 20 V a.c. or

V d.c., 3 A max, 80 mA min,

 

 

 

 

See section 5.13.

 

 

 

 

external power supply.

 

 

 

 

 

 

 

 

 

 

Connector: 4 pin

 

 

 

 

 

WAGO 734-104 pitch 3.5.

 

 

 

 

 

One per board needed.

Contact 1:

J4 / CH8

32 - 33

NRCP-BASE

The contacts are used for unit start/stop and

24 V a.c., 20 mA

start/stop/heat/cool

 

 

 

heat/cool control. They are only taken into

 

 

 

 

 

account if the unit is under remote operation

Connector: 8 pin WAGO

 

 

 

 

control (rEM).

Contact 2:

J4 / CH9

63 - 64

NRCP-BASE

734-168, pitch 3.5

 

start/stop/heat/cool

 

 

 

 

 

 

 

 

 

See the description of these contacts in

 

 

 

 

 

sections 3.6.2 and 3.6.3.

 

 

 

 

 

 

 

Contact 3:

J4 / CH10

73 - 74

NRCP-BASE

Depending on the configuration, this dry

 

demand limit selection or

 

 

 

contact can be used for remote setpoint

 

setpoint selection

 

 

 

selection or demand limit selection (see

 

 

 

 

 

sections 4.3.11.3 and 3.6.4).

 

 

 

 

 

- The remote setpoint selection contact is

 

 

 

 

 

only taken into account if the unit is in

 

 

 

 

 

remote control operating type.

 

 

 

 

 

- The remote demand limit selection contact

 

 

 

 

 

is active whatever the operating type of the

 

 

 

 

 

unit.

 

User safety loop input

J4 / CH11a

34 - 35

NRCP-BASE

This contact is mounted in series with the

 

 

 

 

 

water flow control contact. It can be used for

 

 

 

 

 

any customer safety loop that requires that

 

 

 

 

 

the unit is stopped, if it is open.

 

 

 

 

 

If it is unused this contact must be bridged.

 

 

 

 

 

 

 

Connection to CCN

J12

1 - 2 - 3

NRCP-BASE

An RS-485 bus is used for connection to the

Connector: 3 pin WAGO

 

 

 

 

CCN.

231-303, pitch 5.08

 

 

 

 

- Pin 1: signal +

 

- Pin 2: ground

- Pin 3: signal -

6

Page 5 Page 7
Image 6
Page 5 Page 7
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 blockDUAL-CIRCUIT Units BaseNRCP-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 menuDescription of the Outputs/Tests menu General Menu descriptionOutputs Status & Tests Menu 2 Format Units Description Outputs Status & Tests Menu 2 Manual testsAutomatic tests Additional heating stage statusTest Number Description Confirmation Description of the configuration menu General PasswordTest 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 the User 2 Configuration sub-menu Description of Date and Time configuration sub MenuDate & Time Configuration SUB-MENU Format Comments Typical timer program Description of the Holidays sub-menusBroadcast Configuration SUB-MENU Description of the Broadcast 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/standby operation Heating/cooling/auto selectionCCN 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.
Top Page Image Contents