AIREDALE CR12 - Refrigeration; Electrical; Head Pressure Control (Variable); Electronically Commutated (EC) Fan Motor

Refrigeration
Each unit features as standard:
• Filter drier (supplied loose)
• Holding charge of inert gas
Electrical
All electrical components are rated for all year round outdoor use. All wiring is colour coded and numbered for
identication. All units are wired in accordance with current local and European standards.
Head Pressure Control (Variable)
Matched with Airedale Indoor Unit:
Variable head pressure control is provided by the indoor unit when standard fans or optional EC fans are selected.
Unmatched Units:
Head pressure control is maintained by a modulating fan speed controller tted to the outdoor unit. The controller is
rated to IP54 for outdoor use and will operate accurately in ambient temperatures down to a minimum of -20°C.
Mains Electric Isolator
A weatherproof mains isolator is tted to ensure complete unit isolation of the electrical panel during adjustment and
maintenance.
Electronically Commutated (EC) Fan Motor
Sickle bladed fan assemblies with integral long bellmouth and ngerproof grille. Incorporates external EC rotor motor
technology to provide highly accurate discreet speed control. The fans o󰀨er maximum airow performance while
keeping sound levels to a minimum.
Each fan incorporates electronically commutated DC motor control using semi-conductor modules responding to a
signal from the Airedale indoor unit. EC motors are DC motors with integrated AC to DC conversion; this gives the
exibility of connecting to AC mains with the e󰀩ciency and simple speed control of a DC motor. The EC fan o󰀨ers
signicant power reduction in comparison with equivalent AC fan at both full and modulated fan speeds. The inbuilt
EC fan control module allows for fan speed modulation from 15-100%, the modulating range of a standard AC fan is
typically 40-100% of full fan speed.
Head pressure control is maintained by a modulating fan speed controller tted to the outdoor unit. The controller is
rated to IP54 for outdoor use and will operate accurately in ambient temperatures down to a minimum of -20°C.
General Description
All fans are supplied pre-programmed to a head pressure setpoint of 26 barg and proportional
band setpoint of 6 barg. For alternative settings, please specify at order.
IMPORTANT
Corrosion Resistant Coated Coils
For aggressive atmospheres a corrosion resistant coating can be applied to the aluminium ns.
Head Pressure Control
(On / O󰀨) Head pressure control is maintained via a factory tted on/o󰀨 pressure switch rated to IP54 for outdoor
use as standard. Good control with ambients down to 0°C, below this temperature variable speed controllers are
recommended. The head pressure is factory set to 26 barg (377 psig).
Shut O󰀨 Valves
Where unit isolation for easier maintenance is required, shut o󰀨 valves can be supplied loose for on site tment.
Coil Guards
Protective mesh guards can be tted to each of the outer coils to protect against damage.
CR12 - CR165 50/60Hz CONDENSERS
6 Condenser Technical Manual 6666879 V2_02_2020