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1 - SAFETY CONSIDERATIONS
1.1 - Safety guidelines
Installation, start-up and servicing of equipment can be
hazardous if certain factors particular to the installation
are not considered: operating pressures, electrical
components, voltages, and the installation site (elevated
plinths and built-up structures).
Only qualified installation engineers and fully trained
technicians are authorised to install and start the equipment.
All instructions and recommendations provided in the
service guide, installation and operation manuals, as well as
on tags and labels fixed to the equipment, components and
other accompanying parts supplied separately must be read,
understood and followed.
Failure to comply with the instructions provided by the
manufacturer may result in injury or product damage.
•
Apply all safety standards and practices.
•
Wear safety glasses and gloves.
•
Use the proper tools to move heavy objects.
•
Move units carefully and set them down gently.
CAUTION
Only qualified service technicians should be allowed to
install and service the equipment.
1.2 - Safety precautions
Only personnel qualified 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 should be shut off before any work is
begun. Shut off the main power supply at the main circuit
breaker or isolator.
IMPORTANT: The equipment uses and emits
electromagnetic signals. Tests have shown that the
equipment conforms to all applicable codes with respect to
electromagnetic compatibility.
CAUTION
Risk of electrocution!
Even when the main circuit breaker
or isolator is switched off, specific circuits may still be
energised as they may be connected to a separate power
source.
CAUTION
Risk of burns!
Electrical currents may cause components
to get hot. Handle the power cable, electrical cables and
conduits, terminal box covers and motor frames with great
care.
2 - CONTROL OVERVIEW
2.1 - Control system
Carrier 30RBS chillers and 30RQS heat pumps come with
a Touch Pilot Junior control that serves as the user
interface and configuration tool for Carrier communicating
devices.
Touch Pilot Junior is an electronic control system used to
regulate the following types of units:
•
30RBS air-cooled liquid chillers
•
30RQS reversible heat pumps
Touch Pilot Junior control can function as a stand-alone
system or it may be connected to the building management
system using CCN communication bus.
30RBS and 30RQS units may be fitted with standard fixed
speed fan control system or the optional variable speed
fan drives which can reduce the unit energy use during
occupied and unoccupied periods, provide condensing or
evaporating pressure control and smooth fan start.
For both 30RBS chillers and 30RQS heat pumps the
system may control fixed speed pumps or variable speed
pumps with a hydronic module.
IMPORTANT: This document may refer to optional
components and certain functions, options or accessories
may not be available for the specific unit.
2.2 - System functionalities
The system controls the start-up of the compressors
needed to maintain the desired heat exchanger entering
and leaving water temperature. It constantly manages the
operation of the fans in order to maintain the correct
refrigerant pressure in each circuit and monitors safety
devices that protect the unit against failure and guarantee
its optimal functioning.
2.3 - Operating modes
The control can operate in three independent modes:
•
Local mode:
The unit is controlled by commands from
the user interface.
•
Remote mode:
The unit is controlled by dry contacts.
•
Network mode:
The unit is controlled by network
commands (CCN or BACnet). Data communication
cable is used to connect the unit to the CCN
communication bus.
When the control operates autonomously (Local or
Remote), it retains all of its control capabilities but does
not offer any of the features of the Network.
CAUTION
Emergency stop!
The Network emergency stop command
stops the unit regardless of its active operating type.
