(PDF) An Investigation of Air Conditioning System Diagnosis
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Added on 2021-04-29
(PDF) An Investigation of Air Conditioning System Diagnosis
Added on 2021-04-29
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REPORT ON STATUS OF AIR-CONDITIONER AT LIFT MOTOR ROOM LEVEL 52 & LEVEL 58 AT MENARA TELEKOM MALAYSIA (MTM) By: SINAR TEKNIK URUSHARTA SDN BHD Date: SEPTEMBER 2020
1.0 OBJECTIVE The objective of this report is to update the current status of air-conditioning for lift motor room Level 52 and lift motor room Level 58 at Menara TM. 2.0 INTRODUCTION Menara TM or Telekom Tower is a skyscraper with 77 floors tall is the headquarters of Telekom Malaysia Berhad. The building has 22 skygardens and shaped to represent a sprouting “bamboo shoot”. It is one of the most outstanding architectural structure in the city of Kuala Lumpur located along Federal Highway, Sprint Expressway and Jalan Pantai Baharu. It is primarily an office building with space for Telekom Malaysia and houses several well-known tenants, namely BASF, DHL, Unilever, Henkel Malaysia and Tenaga Nasional. All the facilities including mechanical and electrical system such as air conditioning system, ventilation system, fire alarm system, generator set system and others has been installed since April 1998. Therefore, most of the equipment have exceeded the limit of the lifespan which is more than 20 years. Tm tower has 7 lift motor rooms that control all the elevators in tm tower including cargo lift, VIP lift, passenger lift, and BOMBA lift. The elevators are used to facilitate the work of delivering goods and carrying passengers from one level to another. In a lift motor room, there are various mechanical, electrical and electronic components to control the lift system. All of these components require certain condition of room temperature and humidity to maintain the system stability. A typical 3,000-lb capacity elevator usually requires around 2-ton of AC system depending on the lift motor room’s location in the building and the climate for the local. Most of building elevator manufacturers maintain lift motor rooms between 16C and 26C with a 35% to 60% relative humidity. This is to avoid from the electronic components to break down due to overheat from high temperature. Hence, a good HVAC equipment is needed to ensure the escalators in Menara TM is always in good conditions.
In lift motor rooms level 58, there are a total of 8 air-conditioning including 2 fan coil units and 6 split units. As for lift motor rooms level 53, there are a total of 2 fan coil units installed to cooled down the heat generated by the lift components. The air-conditioning equipment are as follows. Table 1 : Split Unit in Lift Motor Room Level 58 Table 2 : Fan Coil Unit in Lift Motor Room Level 58 Table 3 : Fan Coil Unit in Lift Motor Room Level 53 Most of the split unit and fan coil units in the LMR Level 52 and Level 58 has been too old and has a faulty parts causing the temperature in the lift motor room to increase affecting the operation of cargo lift, VIP lift, passenger lift and BOMBA lift. NOBRANDMODELBtu/hrREFRIGERANT INPUT (AMP)HPAGESPLIT UNIT 1YORKYSL20B6,029R-228.02.0>10 yearsSPLIT UNIT 2YORKYSL28B8,871R-2212.73.0>10 yearsSPLIT UNIT 3YORKYSL28B8,801R-2212.73.0>10 yearsSPLIT UNIT 4ACSONALC60C20,967R-2210.45.0>10 yearsSPLIT UNIT 5ACSONALC30B 10,239R-2214.33.0>10 yearsSPLIT UNIT 6ACSONALC60C20,967R-2210.45.0>10 yearsUNITBRANDMODELREFRIGERANTAGEMOTOR Btu/hrFAN COIL UNIT 1ACMV-T/L58/LMR/FCU-001YORKDB30WATER23 years1.12 kW110,950FAN COIL UNIT 2ACMV-T/L58/LMR/FCU-002YORKDB08WATER23 years0.24 kW20,900UNITBRANDMODELREFRIGERANTAGEMOTOR Btu/hrFAN COIL UNIT 1ACMV-T/L53/LMR/FCU-001YORKDB40WATER23 years1.5 kW160,450FAN COIL UNIT 2ACMV-T/L53/LMR/FCU-002CARRIER40LM40WATER>10years0.57 kW39,580
3.0 CONDITION Over the years, the parts in HVAC equipment for lift motor rooms will wear out due to aging issue and several reasons causing the cooling efficiency to dropped significantly. This will affect the total cooling capacity produced by the HVAC equipment will be not enough to cater the total sensible heat load generated by the lift motor components. The room temperature of the lift motor room will rise damaging the components which will affect the escalators operation. Table 4 : Fan Coil Unit 1 LMR Level 58 status condition Table 5 : Fan Coil Unit 2 LMR Level 58 status condition COMPONENTGOODBADREMARKSMOTOR/MOTORIZED VALVE/Valve bypassedBELTING/FILTER/DUCTING/TEMP ON COIL (°C)/28.5TEMP OFF COIL (°C)/23.7SECONDARY TRAY/RustedCOOLING COIL/BEARING/Squeal soundsREMARKFAN COIL UNIT 1Bearing, motor, valve worn out COMPONENTGOODBADREMARKSMOTOR/MOTORIZED VALVE/Valve bypassedBELTING/FILTER/DUCTING/TEMP ON COIL (°C)/28.7TEMP OFF COIL (°C)/25.1SECONDARY TRAY/RustedCOOLING COIL/BEARING/squeal soundsREMARKBearing, motor, valve worn out FAN COIL UNIT 2
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