Carrier Aquasnap 30RQ User Manual

11.15 - Variable speed ventilation
(30RBP/30RQP units)
The variable speed drives on the fans are used to optimise the
efficiency of the unit depending on the conditions of use
(air temperature, circuit capacity) and hence improve the seasonal
e󰀩ciency (SEER and SCOP).
All fans in the same refrigerant circuit are actuated and controlled
by a single variable speed drive.
Therefore, they operate together at the same rotation speed.
All variable-speed fans are controlled by the unit controller.
For an EC fan option, each variable-speed fan is equipped with
its own variable drive.
The speed is controlled independently for each refrigerating circuit,
This rotation speed at full-load or part load for each circuit is
controlled by an algorithm that continuously optimises the
condensing (cooling mode) or evaporation (heating mode)
temperature, to obtain the best unit energy e󰀩ciency (EER and
COP) whatever the operating conditions.
Fan motor electrical protection
The motors of a same circuit are electrically protected by the
variable frequency drive in case of short-circuit, locked rotor or
general overload.
Each variable frequency drive follows a variable current
characteristic, based on the frequency from 5 to 50 Hz and the
number of fans controlled.
In case of fan failure (e.g. motor disconnected) the variable
frequency drive will detect this problem and an alert will be sent
to the user interface.
Refer to the unit’s control manual for the list of alarms.
11.16 - SmartVu
TM
control
The interface for the SmartVu
TM
control has the following
characteristics:
■ It has a 4.3-inch colour screen.
■ It is intuitive and user-friendly. Clear and concise information
is presented in the local language (choice of 8 languages).
■ The complete menu can be adapted to the various users (end
customer, maintenance personnel, manufacturer engineers).
■ Unit setting and use are secure. Password protection prevents
unauthorised access to advanced parameters.
■ No password is required to access the most important operating
parameters.
11 - MAIN COMPONENTS OF THE UNIT AND OPERATING CHARACTERISTICS
64

Carrier Aquasnap 30RQ Specifications

General

Brand	Carrier
Model	Aquasnap 30RQ
Category	Chiller
Language	English