الحمد لله والصلاة والسلام على رسول الله وعلى آله وصحبه أجمعين choosing Mini-Split A/C Units Selection Tips DETAILED TECHNICAL SPECIFICATION Mini Split Air Conditioning Units must consist of an air cooled condensing unit and a matching fan coil unit, factory assembled, pre-wired pre-charged and factory tested, capable of giving the required capacity at hot conditions, using (R407 or R410) – refrigerant The unit should be internationally reputed ,have undisputed record of approval Condensing unit 1) Casing Casing must be constructed of heavy gauge M.S sheet metal and must be firm and rigid Casing must have an approved anti-corrosive and heat resistant paint finish 2) Coil Condenser coil must be made of seamless copper tube with copper / aluminium straight fins, mechanically expanded over the tubes 3) Compressor Compressors must be of hermetic reciprocating or rotary type of appropriate capacity and must be suitable for operation on 415 V, three phase, 50 Hz 240 Volts, single phase, 50 Hz 110 Volts, single phase, 60 Hz .. USA supply with a permissible voltage variation of +/-6%. Compressors must have inherent thermal protection or external thermal overloads 4) Condenser Fans Condenser Fans must be multi-blade type directly mounted on drip proof motor with Class "A" insulation and must be suitable for operation on 415 volts, 3 phase, 50 Hz. or 240 volts, single phase, 50 Hz or 110 Volts, single phase, 60 Hz .. USA supply with permissible voltage variation of +/-6% Condenser fan motors must be provided with inherent thermal protection Evaporator Unit Evaporator Unit must be wall-mounted / ceiling suspended type 1) Casing Casing must be of heavy gauge M.S. Sheet, with decorative type stove enamel finish, and must be provided with adjustable type air deflectors. 2) Evaporator Coil Evaporator coil must be made of seamless copper tubes with copper / aluminium fins mechanically bonded to the tubes. Spiral fins are not acceptable. 3) Fan Fan must be multi-blade centrifugal, two or three speed impeller type directly mounted on motor shaft and must be easily accessible for maintenance. Fan motor must be open type with Class "A" insulation, provided with inherent thermal protection and suitable for 240 V, 50 Hz. single phase or 110 Volts, single phase, 60 Hz .. USA power supply 4) Air Filters: Air Filters must be of permanent cleanable and washable type and must be easily accessible; thickness must be minimum 12.5 mm Other requirements pre-charged and pre-insulated refrigerant tubing as supplied by manufacturer of the A/C Unit must be used The insulation must be wrapped with 8-oz. canvas and painted with two coats of weatherproof paint في أمان الله
