Safety Considerations; General; Avoid Electrocution; General Description - Carrier AQUASNAP 30RB Manual De Controles Y Soluciones De Defectos

1 - SAFETY CONSIDERATIONS

1.1 - GENERAL

Installation, start-up and servicing of equipment can
behazardous 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 qualifi ed installation engineers and highly qualifi ed
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
recommendations which appear in the installation and
service instructions for the product, aswell as on tags
and labels fi xed to the equipment andcomponents 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.

1.2 - AVOID ELECTROCUTION

Only personnel qualifi ed in accordance with IEC (International
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.
I M P O R TA N T: T h i s e q u i p m e n t u s e s a n d e m i t s
electromagnetic signals. Tests have shown that the
equipment conforms to all applicable codes with respect
to electromagnetic compatibility.
RISK OF ELECTROCUTION: Even when the main circuit
breaker or isolator is switched off, certain circuits may still
be energised, since they may be connected to a separate
power source.
RISK OF BURNS: Electrical currents cause components
to get hot either temporarily or permanently. Handle power
cable, electrical cables and conduits, terminal box covers
and motor frames with great care.
Fan start-up:
ATTENTION: In accordance with the operating conditions
the fans can be cleaned periodically. A fan can start at any
time, even if the unit has been shut down.
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2 - GENERAL DESCRIPTION

2.1 - GENERAL
Pro-Dialog is a system for controlling single-, dual- or triple
circuit 30RB and 30RS air-cooled liquid chillers or 30RQ
air-to-water heat pumps. Pro-Dialog controls compressor
start-up needed to maintain the desired heat exchanger
entering or leaving water temperature. In cooling mode it
controls the operation of the fans to maintain the correct
condensing pressure in each circuit. For heat pump units
it controls and optimises the defrost cycles of each circuit
in order to minimize the heating capacity reduction.
Safety devices are constantly monitored by Pro-Dialog to
ensure their safe operation. Pro-Dialog 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).
• 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 Start/Stop
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 capabilities but does
not offer any of the features of the CCN network.

2.2 - ABBREVIATIONS USED

In this manual, the refrigeration circuits are called circuit
A, circuit B and circuit C. The compressors in circuit A are
labelled A1, A2, A3 and A4. Those in circuit B are B1, B2,
B3 and B4 and those in circuit C are C1, C2, C3 and C4.
The following abbreviations are used frequently:
CCN : Carrier Comfort Network
CCn : Operating type: CCN
EXV : Electronic Expansion Valve
LED : Light Emitting Diode
LEN : Sensor Bus (internal communication bus linking
the basic board to the slave boards)
LOFF : Operating type: Local Off
L-On : Operating type: Local On mode
L-Sc : Operating type: Local On following a time
schedule
MASt : Operating type: master unit (master/slave
assembly)
rEM : Operating type: by remote contacts
SCT : Saturated Condensing Temperature
SST : Saturated Suction Temperature