Carrier 30HX PRO Especificaciones descargar pdf (Pagina 4)

1 - SAFETY CONSIDERATIONS

1.1 - General

Installation, start-up and servicing of equipment can be hazard-

ous if factors particular to the installation are not considered:

operating pressures, electrical components, voltages and the

installation site itself (elevated plinths, rooftops and built-up

structures).

Only highly trained and qualified installation engineers and

technicians, who are fully trained on the product, are

authorised to install and start up this equipment.

During all servicing operations, it is important to read, under-

stand and follow all the recommendations and instructions

given in the installation and service instructions for the

product, including the tags and labels affixed to the equipment,

compo-nents and any parts supplied separately, and to comply

with all other relevant safety regulations.

• Apply all safety codes and practices.

• Wear safety glasses and gloves.

• Use the proper tools to move heavy objects. Move units

carefully and set them down gently.

1.2 - Avoiding electrocution

Only personnel qualified in accordance with the recommenda-

tions of the IEC (International Electrotechnical Commission)

may be permitted access to electrical components. It is

particularly recommended that all sources of electricity to the

unit be shut off before any work is begun. Shut off the main

power supply at the main circuit breaker or isolator.

IMPORTANT:

Risk of electrocution: Even when the main power isolator or

circuit breaker is off, it is still possible for certain components

such as crankcase heaters and trace heaters to be energised,

since they are connected to a separate power source.

Risk of burns: Electrical currents cause components to get

hot either temporarily or permanently. Handle power cables,

electrical cables and conduits, terminal box covers and motor

frames with very great care.

IMPORTANT: Even when the unit is switched off, the power

circuit remains energized as long as the unit or circuit dis-

connect is not open. Refer to the wiring diagram for details.

Use the adapted safety guidelines.

IMPORTANT: This equipment uses and emits electromag-

netic signals. The tests carried out on this product have

shown that it complies with all applicable codes regarding

electromagnetic compatibility.

IMPORTANT : If the boards need to be handled wear anti-

static gloves to avoid exposing the electronic components to a

destructive voltage. Only unpack the boards from their anti-

static bag when they need to be installed.

2 - GENERAL DESCRIPTION

2.1 - General

PRO-DIALOG Plus is a system for controlling units which use

screw compressors:

• Single or dual circuit

• Air or water-cooled condensers

• Non-reversible heat pumps

PRO-DIALOG Plus controls compressor start-up and demand

limits needed to maintain the desired entering or leaving tem-

perature setpoint for water. It automatically sets the position of

the electronic expansion valve (if used) to optimise the evapo-

rator charge. It controls operation of the fans (on air-cooled

units) or water valves (on water-cooled units) to maintain the

correct head pressure in each circuit.

Safety circuits are constantly monitored by PRO-DIALOG

Plus to ensure safe operation of the unit. PRO-DIALOG Plus

also gives access to a Quick Test program covering all inputs

and outputs.

All PRO-DIALOG Plus controls can work in accordance with

three independent modes:

• Local mode: the machine is controlled by commands from

the user interface.

• Remote mode: the machine is controlled by remote

contacts (volt-free contacts, analogue signals).

• CCN mode: the machine is controlled by commands from

the Carrier Comfort Network (CCN). In this case a data

communication cable is used to connect the unit to the

CCN communication bus.

The operating mode must be chosen with the Operating Type

selection button described in section 4.2.1.

When the PRO-DIALOG Plus system operates autonomously

(Local or Remote mode) it retains all of its own control capa-

bilities but does not offer any of the features of the CCN

network.

2.2 - Abbreviations used

In this manual the circuits are called circuit A and circuit B.

The compressors in circuit A are labelled A1 and A2. Those in

circuit B are labelled B1 and B2.

The following abbreviations are frequently used:

AI - Analogue Input

AO - Analogue Output

CCn - Operating type: CCN

CCN - Carrier Comfort Network

DI - Discrete Input

DO - Discrete Output

EXV - Electronic Expansion Device

LED - Light Emitting Diode

Loader - Compressor capacity step

LOFF - Operating type: Local off

rEM - Operating type: by remote control contacts

SCPM - Compressor Protection Module

SCT - Saturated disCharge Temperature

SIO - Standard Input/Output - internal communication

bus linking the basic board to the slave boards

SST - Saturated Suction Temperature

1 2 3 4 5 6 7 8 9 ... 35 36

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Carrier 30HX PRO Especificaciones Pagina 4

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