Technical data

Precision Air Conditioning

Technical Manual : 6258867 F 07/2012

General Description

STANDARD FEATURES

Large surface area coil(s) ideally positioned to optimise airflow and heat transfer,

manufactured from refrigeration quality copper tubes with mechanically bonded

aluminium fins.

Fins are coated with a non-stick acrylic film (hydrophilic) which provides additional

corrosion protection and efficient surface water removal for improved performance.

Coil headers are circuited to ensure low water pressure drops.

The cooling coil is mounted over a full width stainless steel condensate tray.

For control of water flow, a 3 port, raise/lower type, modulating mixing control valve is

fitted as standard.

Maximum operating pressure 10Bar. Factory pressure tested to 20Bar.

Chilled Water Coil

(CW Models)

Sweat copper pipe for brazed connection as standard. Optional threaded connections

available refer to General Specification - Chilled Water Models.

Fan & Motor Assembly - Standard

Units utilise a double inlet, forward curved, direct drive centrifugal fan with integral shaft

mounted motor which is statically and dynamically balanced for quiet operation. Impellers

and casings are galvanised for protection against corrosion. The integral motor runs in

sealed for life, lubricated bearings and features automatic thermal overload protection.

Fan speed, airflow and external static pressure are controlled by the use of a voltage

controller via the microprocessor display keypad which maintains optimum performance

and offers easy on site adjustment.

Sizes 9 - 19

(Direct Drive)

Adjustable by increments of 0.1 VDC between 2 - 10 VDC.

Double inlet forward curved centrifugal fan(s) with galvanised impellers and casing.

Mild steel fan shaft with lifetime lubricated ball bearings.

Fan and drive assembly design is based on a minimum of 25,000 hours life expectancy.

Each fan assembly separately driven by a high efficiency air cooled motor through a

pulley and ‘V’ belt drive. The complete motor assembly is mounted on a fully adjustable

platform for belt tensioning. Motor specification conforms to IE2 (EFF1).

Fan motors up to 2.2kW use adjustable pitch pulleys on the motor with a fixed pitch pulley

on the fan shaft, 3kW fan motors and above use fixed pitch pulleys to both the fan motor

and fan shaft to vary air volumes.

Sizes 23 - 95

(Belt & Pulley)

Fan(s) from 4kW and above have twin belt drives and plummer block bearings.

GENERAL