8. Air Handling Unit (AHU):
- 68 units
- manually operated
- controls the air-conditioning system of 5 shops.
- Air supplied = 2˚C, returns = 23˚C.
- Thermostat - control the temperature of air supplied.
- Maintenance works for cooling coil – every 2 months.
Control panel
Thermostat
10. Chiller:
- 3 chillers
- 1 chiller filled with 750 tons of water (10:30a.m to 7:00 p.m.)
- 2 chillers filled with 1500 tons of water(9:30 a.m. to 9:30 p.m.).
- have been used for over 26 years and do not encounter any
overheat problems.
Chiller Chiller control penal
11. Cooling tower:
- 6 at roof top.
- balancing pipes - ensure the water is supplied at the same volume.
- ball valve - indicate and control the supply of water.
- hot water is pumped from the condenser to the cooling tower by using
condenser water pump.
Cooling tower
13. Zoning:
- single zone variable air volume. (air is supplied in same
temperature but different volume).
- MBO cinema - single zone constant air volume.
15. Fire Protection
Active Passive
1. portable fire extinguishers 1. Escape route: Pressurized staircase
2. Automatic extinguisher
- Carbon dioxide gas extinguishing
system
- Sprinkler system
2. Fire rated door
3. Fire hydrant 3. Fire man lift
4. Hose reel
5. Risers
6. Detectors
7. Alarm system and voice
communication system
16. 1. Portable fire extinguishers
Powder type
- used inside the mall
- provided one in every shop
- placed in white metal box
Carbon dioxide type
-Used in electrical room, transformer room and water plant room
Maintenance: once a year
9kg
17. 2. Automatic extinguishing system
a. Automatic Carbon dioxide system
TNB rooms
both smoke and heat detectors
non-conductive properties
18. b. Sprinkler system
- wet sprinkler
- distance: 3m
- red bulb liquid color = 68 degree Celsius
- pressed steel storage tank = 48,000 gallons capacity
-1 duty pump, 2 standby pumps and 2 jockey pumps
-ball valves
19.
20. 3. Fire hydrant
8
3- way hydrant
Hydrant – hydrant = 68m
hydrant - building = 8.90m
hydrant - road = 6m
21. 4. Hose reel
11 sets
wet riser tank & close range pumps
30m long
diameter of 8.47mm
Canvas reel – landing valve
24. 6. Detectors
a. Smoke
-lift lobby and inside the mall
-35m2
b. Heat
-TNB rooms
connected to fire alarm panel and linked to fire control
room
25.
26. 7. Alarm detection
Manual call points = 1.46m
connected to fire alarm panel and fire control room
Automatic alarm bells
Fire switch
27. 8. Voice communication system
installed at every services room and lift lobbies
Communicate to the people in the fire control room.
28. Passive: 1. Escape route- Pressurized staircase
purpose made ventilation grille of independent pressurization
system
Fire switch
Emergency light
riser =160mm
tread =270mm
29.
30. 2. Fire rated door
1 hour
escape route and service rooms
31. 3. Fire Elevator
When there is fire, all elevators will return in sequence
directly to the designated floor, which is the LG Floor.
Only fire elevator can be manually operated by the
firemen via the fire lift switch.
34. Elevator
9 groups serving the whole shopping mall.
• 7 are connected directly to the car park.
( electric elevators )
• 2 groups within the shopping mall excluding car
park level
( hydraulic elevators )
• In one group, there are 2 elevators, with one of the
elevator designated for Bomba in terms of
emergency.
37. Specifications
Electric Elevator Hydraulic Elevator
Elevator Capacity 1800kg 1360kg, 26 persons
Internal Car Size 180cm*183cm 90cm*270cm
Door arrangement two - speed centre
opening
single - speed centre
opening
Round-Trip Time(RTT) 1 minute 2 minutes 15 seconds
38. Operation of System
Electric Elevators moves
the elevator car up and down
using traction steel ropes and
sheaves with a counterweight
to balance the load.
39. Operation of System
Hydraulic Elevator use
hydraulic power to
pressurise the piston at the
base of the elevator to
raise and lower the car.
40. Motor Room
Located on top of the elevator shaft.
Housed traction machines of all elevators, including the
control panel.
Traction Machine Traction Sheave
41. Escalators
moving stairs used to convey people between floor
levels.
It can be constructed in few arrangements, which are
one-way traffic and two-way traffic.
7 criss-cross and 2 parallel
49. Transformers
17 transformers
5 12
HVAC system Electric supply
Step down 11kV 415V
Silica gel breather
Prevent damage as incoming
air consists of moisture & dirt.
Blue when installed & turn
purple when they absorb
moisture.
52. Bar coupler
Electric Riser
Feeder pillar panel
2 feeder pillar panel
Only 1 feeder pillar
panel is used
Another 1 is use when
the existing feeder
failure
Electric riser
Distributes electric
supply
Bar coupler
Transfers electric
when the feeder is
failure.
53. Generator Set
Electrical generator + engine
mounted together
Convert mechanicalelectrical
energy
3 generator set
With battery
11250kVa
21000kVa
Use for backup
54. Air Circuit Breaker (ACB)
Main circuit breakers
Compressed air is used to
interrupt circuit.
61. Cold Water Supply
Pneumatic water pressure boosting system
Suitable for tall buildings
Water enter from rising main> store in tank
62. System consists electrical control panel, hydro-
pneumatic pump, water storage tank.
63. Pneumatic water pressure boosting system
System pressure maintained by small air compressor and
pneumatic cylinder
Small air compressor: contain water with pressurized air
space
64. Indirect boosting from break tank
- using pneumatic cylinder
- a continuous running pump
65. Break tank
- supply the system if main supply becomes
insufficient
- create pressure zones
66. GI piping- rust easily
Why choose?
- first mall in KL in the 80’s
- PVC not popular
Make up tank- compensate water shortage period
67. Let’s watch a video
http://www.youtube.com/watch?v=LJiT3VHJwZI
68. 1. Single Zone Variable Air Volume Multi
Zone Variable Air Volume
More energy efficiency
Recommendations- HVAC
69. 2. Manual Controller Automatic Controller
The operation will be more accurate
Energy efficiency
Usage of manpower and related cost can be cut down
How it works
The electronic control unit evaluates the signals from sensors to
determine the operating conditions, and controls the actuators to
move dampers and valves that control the volume, temperature and
direction of the air delivered
70. 3. Industrial fan & UV glass
• Distribute air evenly
• Block 99% of UV radiation while transmitting the desired light
71. 4.Return duct
• Can be used to extract warm air & recycle it through
the system for either cooling or heating purpose
• Energy efficient compared to open ceiling system
72. 1. Fire blanket and fire extinguishing ball
Portable Fire extinguisher
Recommendations- Fire Protection
73. i. Fire blanket
flame-resistant blanket
extinguish small fire or protect a person from fire by wrapping the
blanket around
made from 2 layers of woven glass fibre fabric and an inner layer
of fire retardant film
74. ii. Fire extinguishing ball
spherical shape of fire extinguisher
1.3kg only
is activated when it is contact with flame and it will burst to
spread dry chemical to extinguish fire when temperature is
reach 70 Degree Celsius
Make noise when activated to alert occupants
75. 2. Fire rated door for landing door & fire control room door
i. UBBL clause 152.2
ii. landing door shall have a FRP (fire
resistance period) of not less than half
the FRP of hoist way structure with
minimum FRP of one hour.
iii. prevent the spread of fire from landing
side into the lift shaft for a period time
77. 3.Visible Fire alarm system + Alarm bell Alarm bell system
i. UBBL clause 242
ii. special requirements for fire alarm system
should be provided where occupants are
undesirable for audible alarm system
iii. visible alarm signal such as fire alarm strobe
lighting device
