1. Test Programme for AC coaches
ELPS/TP/AC/01’JAN 94

2. Tests to be carried out on RMPU coaches
Conditioned air leakage test
Air delivery test
Pre-cooling test
Pull down test
Spare capacity test
Test for safety devices
Generation test (SG AC coaches)

3. Tests on RMPU coaches Conditioned air leak test
To be conducted after completion and cleaning of Ducts & filters.
Install Return air and Fresh air filters and adjust Fresh air quantity
Run both the Blowers
Traverse a smoke of Agarbatti/Dhoopbatti near
Evaporator chambers
Canvas and main duct
Fresh and return air duct
Detected air escape routes to be blocked.

4. Tests on RMPU coaches Air delivery test
Calculated from Fresh air requirements (0.7 (smoking)/0.35 (non-smoking) m3/min/passenger)
Velocity measured with anemometer using hoods (FA)
FA=Exhaust air (max)
Conditions
Voltage 130+/-1 V DC/ 415+/- 5% V AC
Both side blowers running
Fans OFF
Readings taken after ½ hour
Coach under shed
FA & EA to be regulated (FA set value = EA (-10%))

5. Tests on RMPU coaches Pre-cooling test
Conducted to record time taken for cooling the coasch without passengers, FA blocked, Light & Fans ON and temperature of AC compartment raised to 45 0C.
Coach placed under shed
FA intake openings blocked
DB & WB temperature of Ambient taken
Calculate & provide Electrical compensating load from chart
Raise AC compartment temp to 45 0C by switching RMPU heaters ON in manual mode and compensating load.

6. Tests on RMPU coaches Pre-cooling test (contd….)
Switch ON lights and fan and Run both the plants in Auto mode (Thermostat working to be ensured)
In earlier built coaches time to be recorded with each High/Med/Low settings
Record the timings of each RMPU
Total time taken by each plant to cool the coach to lowest setting to be < 1 hour.

7. Tests on RMPU coaches Pull down test
Conducted to see the AC plant capability to cool the fully occupied coach inextreme summer conditions.
Adjust FA openings as per requirements
Switch ON electrical compensating load (duly 120 W/person present inside )and RMPU heaters in Manual mode and raise temp to 45 0C.
Switch ON all light and fan
Run both the plants in Auto mode
Record time taken for cut-off
Time taken to be < 2 hrs

8. Tests on RMPU coaches Spare Capacity test Test for safety devices
Run both plants in Auto mode
Record total OFF & ON time over a period of 1 hr
Calculate % spare capacity =Total OFF time/Total time*100
Test for safety devices
HP (by switching OFF condensers)/LP (by switching OFF blower) cut-outs and running compressors by bypassing condenser/AC1 interlocks
Should operate within +/- 5% of set value
Vane relay
OHPs
Thermostats

9. Tests on RMPU coaches Generation test (SG coaches) Commissioning test
Run the alternators with the help of Dyna drive
Record cut-in speeds (to be < 400 RPM)
Run alternators at 800, and 2000 RPM with both RMPUs running and battery in circuit and record load being shared by each alternator (Difference not to exceed 30 Amp)
Commissioning test