NEC MultiSync XG135LC, Installation Manual

Page: 5 / 20

5
Ceiling Mount Projection Distance and Screen Size for XG85
• Install in such a way that the projector and screen are positioned in the proper direction and at the proper angle. If not, the projector's
performance will be affected and its reliability will decrease. Be sure to position the projector properly.
The manufacturer will not be held responsible for any problems occurring when the projector is not installed in the proper position.
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation
NOTE:
• For screens 150 inches (3810mm) or larger (in the diagonal direction), set so that the distance between the surface of
installation of the mounting A and the ceiling is E.
• Set the projection distance based on the width of the screen.
• If the figures on the table do not match the figures in the formulae, use the figures on the table.
• For screen sizes of 60 to 300 inches not indicated on the table, use the following proportional formulae:
When using a screen 150"
(3810mm) or larger (in the
diagonal direction)
E
B
Screen center
Ceiling Mounting
α
Line of sight
α
α
A
Screen center
B
C
Ceiling Mounting
11.15"
(283mm)
5.12"
(130mm)
Ceiling Mount System
144"
(180")
160"
(200")
192"
(240")
216"
(270")
240"
(300")
A
B
C
E
48"
(60")
Screen size H-Width
(4:3 Diagonal)
56"
(70")
0.976 0.977 0.978
γ
(=cos
α
)
12.7
°
12.6
°
12.4
°
12.1
°
α
0.220 0.218 0.215 0.210
β
(=sin
α
)
196.11
4981
54.38
1381
191.31
4860
–
–
214.02
5436
58.31
1481
208.78
5303
1.69
43
258.51
6566
68.10
1730
252.18
6406
3.91
100
290.48
7378
75.12
1908
283.37
7198
5.88
150
315.67
8018
80.66
2049
307.95
7822
9.35
238
81.54
2071
28.36
721
79.73
2025
–
–
inch
mm
inch
mm
inch
mm
inch
mm
70.28
1785
26.00
661
68.72
1746
–
–
Units=mm W"=Screen H-Width
A = (25/96
2
W"
1
12.5)
2
126.64
`
1785
B = (
β
2
A)
`
286
C =
γ
2
A
E = (1/2
2
Screen Height)
1
B
Units=inches W"=Screen H-Width
A = (25/96
2
W"
1
12.5)
2
4.99
`
70.28
B = (
β
2
A)
`
11.26
C =
γ
2
A
E = (1/2
2
Screen Height)
1
B
• The margin of error for projection distance (A) is
5
3%.
INSTALLATION SET-UP INSTRUCTION
120"
(150")
164.69
4183
47.19
1199
160.72
4083
–
–
96"
(120")
133.43
3389
39.91
1014
130.32
3310
–
–
80"
(100")
112.68
2862
35.46
901
110.05
2796
–
–
72"
(90")
101.74
2584
33.11
841
99.36
2524
–
–
64"
(80")
91.6
2318
30.86
784
89.13
2264
–
–