Determination of LEV standard opening in each indoor unit

The standard opening is on the straight line, which connects an each standard point in the section where divided into seven according to the operation frequency of compressor as shown in the figure below.

(LEV opening is controlled in proportion to the operation frequency.)

NOTE: Opening is adjusted at the standard opening according to the indoor unit conditions.

However, inclination of standard opening in each point of opening does not change with the original curve.

Add opening provided in Difference in capacity in the table below to the standard opening from 1 to 8, when capacity of the indoor unit is excluding code 1.

Add opening provided in Difference in operation number in the table below to determined LEV opening for each indoor unit, when 2 or 3 indoor units are operated at the same time.

NOTE: Even when the adjusted standard opening exceeds the driving range from 59 to 500 pulse, actual driving out- put opening is in a range from 59 to 500 pulse.

 

 

 

 

 

 

 

 

 

4Hz

 

 

10

 

 

 

 

 

 

 

 

 

(code)

09

 

 

 

 

 

 

 

 

 

08

 

 

 

 

 

 

 

 

 

07

 

 

 

 

 

 

 

 

 

Opening

 

 

 

 

 

 

 

 

 

06

 

 

 

 

 

 

 

 

 

05

 

 

 

 

 

 

 

 

 

04

 

 

 

 

 

 

 

 

 

LEV

 

 

 

 

 

 

 

 

 

03

 

 

 

 

 

 

 

 

 

02

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

01

 

 

 

 

 

 

 

 

 

 

23

38

54

69

84

100 115 131 146 MXZ-2A

 

14

23

32

41

50

59

68

77

86

MXZ-3A/4A

Compressor operating frequency (Hz)

MXZ-2A20NA

 

 

 

 

 

Standard opening (pulse)

 

 

 

 

 

 

 

 

 

LEV Opening (code)

1

2

 

 

3

4

5

 

6

 

7

8

 

9

 

 

10

 

 

 

 

 

COOL

120

130

 

136

146

156

 

160

 

170

180

 

190

 

200

 

 

 

 

 

HEAT

100

110

 

120

130

146

 

160

 

170

180

 

190

 

200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Difference in capacity

 

 

 

 

 

 

Difference in operation number

 

Code3,4

 

Code5,6

Code7,8

 

Code9,10

Code11,12

 

Code13,14

Code15or above

 

2

COOL

3

 

 

6

 

 

9

 

 

 

12

15

 

 

25

 

35

 

-20

HEAT

3

 

 

6

 

 

9

 

 

 

52

55

 

 

65

 

75

 

0

MXZ-3A30NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard opening (pulse)

 

 

 

 

 

 

 

 

 

LEV Opening (code)

1

2

 

 

3

4

5

 

6

 

7

8

 

9

 

 

10

 

 

 

 

 

COOL

126

130

 

134

138

140

 

142

 

182

228

 

296

 

310

 

 

 

 

 

HEAT

140

146

 

150

170

180

 

200

 

224

244

 

272

 

280

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Difference in capacity

 

 

 

 

 

 

Difference in operation number

 

Code3,4

 

Code5,6

Code7,8

 

Code9,10

Code11,12

 

Code13,14

Code15or above

2

 

3

COOL

3

 

 

6

 

 

9

 

 

 

12

15

 

 

25

 

35

-20

 

-30

HEAT

3

 

 

6

 

 

9

 

 

 

52

55

 

 

65

 

75

0

 

0

25

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Image 25
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