Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 8)

OPTICHILL
™
Chillers
8
Chillers
Technical Manual : 6530166 F 03/2012
General Description
STANDARD FEATURES
Construction The base is fabricated from galvanised steel to ensure a rigid, durable,
weatherproof construction.
Unit panels are manufactured from galvanised sheet steel coated with epoxy baked
powder paint to provide a durable and weatherproof finish.
Standard unit colour is Light Grey (RAL 7035).
Compressors and evaporator are mounted on a rigid galvanised heavy-duty sub frame.
Fully weatherproofed electrical panels are situated at one end of the unit.
Evaporator Shell and tube heat exchangers constructed from a steel shell with internally enhanced
copper tubes. Internal baffles in the water circuit optimise flow whilst keeping pressure
drop to a minimum. The heat exchanger is insulated with closed cell polyurethane foam
which is to Class O fire rating and the material is UV resistant.
Water inlet and outlet connections are of grooved type pipe and coupling assembly,
optional flanged connections available on request, please consult Airedale.
An immersion heater and thermostat protect the evaporator against freeze up in ambient
temperatures down to -20°C.
Connections for External Trace Heating (230V/500W available).
Water Connections Water inlet and outlet connections are of a grooved and clamped type construction. The
unit is supplied with a counter pipe and coupling assembly for quick connection.
Condenser Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,
manufactured from refrigeration quality copper tubes with mechanically bonded
aluminium fins.
The copper tube is internally rifled for improved heat transfer.
Fan & Motor Assembly
AC Fan Motor -
HED Model Only Sickle bladed fan assemblies with integral long bellmouth and fingerproof grille;
incorporate external rotor ac motor technology, capable of highly accurate discreet speed
control, discharges air vertically. The fans offer maximum airflow performance while
keeping sound levels to a minimum.
Each fan is speed controllable and operates from a 3 phase electrical supply.
Energy efficient Electronically Commutated (EC) fans are also available; refer to Optional
extras , on page 11.
Electronically Commutated
(EC) Fan Motor -
HEDQ, HE+D & HE+DQ
Models ES Each fan incorporates on board electronics with AC/DC Conversion and inverter
driven DC motor control to offer unparalleled high efficiency levels combined with
smooth stepless speed control and quiet operation.
Sickle blades reduce air turbulence to minimise sound levels and power
consumption whilst maximising performance.
The long bellmouth design provides improved aerodynamics, up to 10% more air
movement, and an extended vertical throw of air to reduce the chance of air re-
circulation. As standard the enclosure is complete with an integral
fingerproof grille.
The fans offer maximum airflow performance while keeping sound levels to
a minimum.
For further details, please refer to Design Features & Information , on page 17.