Carrier Pro-Dialog CONTROL 4 Manual de usuario descargar pdf (Pagina 3)

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Installation, start-up and servicing of equipment can be

hazardous if certain factors particular to the installation are

not considered: operating pressures, presence of electrical

components and voltages and the installation site (elevated

plinths and built-up up structures).

Only properly qualiﬁed installation engineers and highly

qualiﬁed installers and technicians, fully trained for the

product, are authorised to install and start-up the equipment

safely.

During all servicing operations all instructions and recommen-

dations which appear in the installation and service instruc-

tions for the product, as well as on tags and labels ﬁxed to

the equipment and components and accompanying parts

supplied separately, must be read, understood and followed.

• Apply all standard 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.

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Only personnel qualiﬁed in accordance with IEC (Inter-

national Electrotechnical Commission) recommendations

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: This equipment conforms to all applicable

codes regarding electromagnetic compatibility.

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Pro-Dialog is an electronic control system to regulate 38RBS

condensing units. These units have one or two refrigerant

circuits.

Pro-Dialog control must be completed either by a thermostat

or by two temperature sensors (room and supply air).

Control by thermostat (via contacts) is the default operating

mode and called remote mode.

For two-stage cooling units the Carrier 33CS thermostat

can be used.

The thermostat (programmable or non programmable)

ensures the start-up of the indoor fan and controls the unit

cooling stages (two to four stages, depending on the unit

size). This thermostat can also allow control of the electric

heater.

A second control type with temperature sensors is also

possible. Selection and parameter setting of this control

type are only available via the Carrier Pro-Dialog+ HMI

user interface. As an option Carrier offers the complete

equipment required for this control type.

To use this control type, three operating modes are available:

• Local on - continuous temperature control.

• Loc/Prog on - temperature control only in the occupancy

ranges deﬁned by the user via the local interface.

• CCN bus - temperature control, based on the commands

from the Carrier Comfort Network (CCN).

Temperature sensor control permits:

• room temperature control at the desired setpoint,

• ensuring a minimum supply air temperature.

Independent of the selected control type, Pro-Dialog:

• ensures user comfort,

• controls the compressors based on the cooling load,

• controls the fans to optimise operation of each

refrigerant circuit,

• ensures unit protection.

The heating stages are not controlled by Pro-Dialog.

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In this manual, the refrigerant circuits are called circuit A

and circuit B. The compressors in circuit A are labelled A1,

A2 and A3. Those in circuit B are B1 and B2.

The following abbreviations are used frequently:

CCN Carrier Comfort Network

DGT Discharge gas temperature

LED Light Emitting Diode

LEN Internal communication bus linking the main

board to the slave boards

OAT Outdoor air temperature

SCT Saturated condensing temperature

SST Saturated suction temperature

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Carrier Pro-Dialog CONTROL 4 Manual de usuario Pagina 3

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