Archive for August, 2009

Hot Air Ventialation Problem of the O.T Room Air Conditioning

Categorized Under: Site Experience No Commented

Problem:
Air conditioning (Carrier) for the operation theater room (OT) not cold enough and can’t meet the requirement to achieve temperature of 18 degree Celsius.

The off coil temperature is too high (20.4 degree Celsius)
Flow rate or cubic feet per minute (CFM) of the air conditioning not able to achieve the designed specification CFM

Cause of the problem:
Air [...]

Operation Theater Room Air Conditioning System Specification

Categorized Under: Air Conditioning & Ventilation No Commented

Air conditioning is the most important or crucial part for the Operation Theater Room (O.T). Failure or wrong design of the air conditioning will jeopardize the Operation Theater Room. In Malaysia, if the O.T Room air conditioning system unable to the meet the Health Department specific requirement, the Hospital is not allowed to Operate with [...]

LT Electrical Service: Electrical Cable Sizing Selection

Categorized Under: LT Power Supply No Commented

Item

Rated Current (Amps)

Recommended Cable Size

Short Rating@1 sec

1

1A~6A

1.5mm2

~

2

10A~28A

4mm2

0.46kA

3

29A~36A

6mm2

0.69kA

4

37A~50A

10mm2

1.15kA

5

51A~68A

16mm2

1.85kA

6

69A~89A

25mm2

2.89kA

7

90A~110A

35mm2

4.04kA

8

111A~134A

50mm2

5.77kA

9

135A~171A

70mm2

8.08kA

10

172A~250A

95mm2

10.96kA

Cable size is important factor that determine how many amp or electrical load that cable can carry on. If the cable size that we select is lower than amp or electrical load that it can carried or under design, it will cause the DB to trip or even the [...]

Water Supply Design: Water Supply System Pump Design General Rule

Categorized Under: Water Supply No Commented

Pumps are the most important equipment in water supply systems and it consume the greatest amount of energy. Failure of pumping facilities will result in loss of production or supply of water. Planned water quantity and the number of pump units required shall be determined according to the following criteria:

For treated water pumps the capacity [...]

Fire Protection Services: Hose Reel Pump Start/Off None Stop

Categorized Under: Active Fire Protection No Commented

Problem:
Hose reel pump set malfunction, keep start/off. In long term, it will cause the pump overloaded and malfunction.
Root Cause/Troubleshot:
The none return valve of the discharge piping of the hose reel system from the pump set malfunction.

Hose Reel System
Technical Part:
On/Off of the hose reel pump set is controlled by pressure sensor of the hose reel system.  [...]