General Specification: Split Type Air Conditioning System
Uploaded by
Lasandu WanniarachchiGeneral Specification: Split Type Air Conditioning System
Uploaded by
Lasandu WanniarachchiSplit type air conditioning system.
GENERAL SPECIFICATION
The Air Conditioning Units shall be of the split type suitable for indoor installation unit and out door
installation unit with wall brackets where necessary in case of upper floors of a building, power connection,
condensate water drain piping using suitable PVC piping to the nearest common drain line.
The product shall be ASHREA Energy efficiency Class A with COP not less than 4.4.
The out door unit shall be housed in a Galvanized steel fabricated box with acoustic, heat insulation and
vibration protected painted with corrosion resistive paints suitable for Tropical climate.
The indoor unit shall be architecturally designed and made in elegant appearance with sound and noise
protections, piping and auto, remote controls.
This installation shall facilitate in such a way to permit the removal of the units when the repairs to be
carried out.
a. The unit shall be with fully hermitic compressor,
b. Operate on a Refrigerant free of halocarbons.
c. Condenser with inbuilt fan.
d. Evaporator with Squirrel Cage Fan,
e. Air throws control facility with facility for control for efficient operation.
f. Remote Control device.
2.2 COMPRESSOR SPECIFICATION
Compressor :
The Compressor shall be energy efficient fully hermitically sealed type rotary / reciprocating, 400 V + / -
10 %, .3 Phase, 50Hz. Operating on Refrigerant R 410A.
The compressor Motor shall be suitably protected against overloading using a removable suitably sized
over load protection. These shall be mounted on resilient mountings for quite operation. It shall be with low
vibration and noise less than 60dB (A) at 3 m distance.
2.3 AIR CONDITION UNIT ENCLOSURE
2.3.1 General
The unit shall be wall mounted and locked on to the steel enclosure made out of Galvanized steel with
protective paints suitable for tropical climate. The enclosure shall be ensured earthing. The units and all
electrical components should be suitable for the operation on 230 / 400 volts + 10% 01 phase 02 wire/ 03
phase 4 wire , 50Hz, AC power Supply.
2.3.2 Construction
The panels shall be of sheet metal, wall mounted as per the specification The design shall be totally
enclosed, dust and rain splash-proof as per IP 55 of IEC publication 34-5. The housing of the panel shall be
fabricated of 14 SWG. The outer and inner surface of the panels shall be primed and painted with corrosive
resist PVC, Epoxy or plastic, marine grade special coating.
Access to all equipment mounted inside shall be from the front. Switch gears and earth, main connections
and auxiliary wiring shall be arranged and marked in general compliance with relevant British standards.
2.3.3 Earthing
A suitable earth terminal should be provided to facilitate the connection of the main earth. Earthing
arrangement should be complies with BS 7430 and earth resistance of the main earth should not be exceed
2.3.1 Wiring
Control wiring shall be concealed by taking through neatly arranged PVC Spiral wire protectors and all
control wires shall be terminated with cable lugs or compression type terminals. All Current carrying bolts
and nuts shall be of high conducting material.
2.3.5 Control Panel Equipment, Remote Controls and Protections
The equipment to be mounted on the control panel / Remote controller of Air Conditioning Unit shall
consist of the following and starting method as per the specification.
a Over Load protection for the all Motor.
c Thermostatic expansion and flow control of the refrigerant
d Room temperature sensor
e Fan speed control, three minimum speeds.
f Compressor loading control, high / low and economical
g Incase of all VVSD drives and PLC controls all electronic equipment’s shall be protected with power
surge, protected against short circuiting.
h. Remote controller with LCD display shall be provided with one on / off timer, selecting fan speed (three
speeds) and setup of temperature.