Arranging the air handling unit control panel for low-speed and minimum air circulation and heating

This method is applied in cases where minimum ventilation with low-speed air flow is necessary. In such an application, command elements of the panel (Fig.24) and AHU (Fig.25) are arranged by Marine Engineer.

Figure.24 Air handling unit control panel arranged for low-speed, minimum air circulation and heating

Figure.25 Air handling unit running for low-speed and minimum air circulation and heating

Table. 8 Command-and-control elements on panel arranged for 100% air circulation and cooling

Sq. Element                Setting/Monitoring                              Condition

1.      Command             Shift Power switch                                ON

2.      Control                  Monitor Power lamp lits                        WHITE

3.      Control                  Monitor Phase lamps lit                        RED, GREEN, YELLOW

4.      Control                  Monitor Alarm lamps lit                         WHITE

5.      Command             Set control switch                                 MAN

6.      Command             Set AHU start time                                20h 30m

7.      Command             Set AHU stop time                               06h 30m

8.      Control                  Monitor outdoor air temperature             32 ^oC

9.      Control                  Monitor outdoor air humidity                  80%

10.   Control                  Monitor outdoor air quality                    35%

11.   Command             Set room thermostat temperature          21

12.   Command             Set room air humidity                            55%

13.   Command             Set room thermostat air quality              80%

14.   Command             Set RAD                                              100%

15.   Control                  RAD opens and lits                              100%    , GREEN

16.   Command             Set EAD                                              0%

17.   Control                  EAD opens and lits                               0%       , RED

18.   Command             Set FAD                                              0%

19.   Control                  FAD opens and lits                               0%       , RED

20.   Command             Set SAD                                              100%

21.   Control                  SAD opens and lits                               100%    , GREEN

22.   Command             Set MAD                                              100%

23.   Control                  MAD close and lits                               100%, GREEN

24.   Command             Click on button                                     START

25.   Control                  Monitor START button lits                     GREEN  

26.   Control                  Monitor Aspirator voltage analog           380  

27.   Control                  Monitor Aspirator voltage digital             380  

28.   Control                  Monitor Aspirator current analog           15

29.   Control                  Monitor Aspirator current digital             15

30.   Control                  Monitor Aspirator speed analog             250  

31.   Control                  Monitor Aspirator speed digital              250  

32.   Control                  Monitor Ventilator voltage analog          380  

33.   Control                  Monitor Ventilator voltage digital           380  

34.   Control                  Monitor Ventilator current analog           15  

35.   Control                  Monitor Ventilator current digital             15  

36.   Command             Set Aspr. and Vent. fan speed              250

37.   Control                  Monitor Ventilator speed analog             250  

38.   Control                  Monitor Ventilator speed digital             250

39.   Control                  Monitor Heating valve motor lits            GREEN

40.   Control                  Monitor Heating valve lits                      GREEN

41.   Control                  Monitor Cooling valve motor lits             RED

42.   Control                  Monitor Cooling valve lits                      RED

43.   Control                  Monitor Humid valve motor lits             RED

44.   Control                  Monitor Humid valve lits                        RED

45.   Control                  Monitor De-humid valve motor lits         GREEN

46.   Control                  Monitor De-humid valve lits                   GREEN

47.   Control                  Monitor last heating valve motor            GREEN

48.   Control                  Monitor last heating valve lits                GREEN

49.   Control                  Monitor outdoor Temperature                32

50.   Control                  Monitor outdoor air humidity                  80

51.   Control                  Monitor outdoor air quality                    35

52.   Control                  Monitor return air temperature               28

53.   Control                  Monitor return air humidity                    70

54.   Control                  Monitor return air quality                       65

55.   Control                  Monitor air filter-in pressure                   1.1

56.   Control                  Monitor air filter-out pressure                 1.2

57.   Control                  Monitor heating coil-in temp.                 18

58.   Control                  Monitor heating coil-out temp.               21

59.   Control                  Monitor cooling coil-out temp.               21

60.   Control                  Monitor humidity                                   55

61.   Control                  Monitor Supply air temperature              21

62.   Control                  Monitor Supply air humidity                   55

63.   Control                  Monitor Supply air quality                      80