15
F
IGURE 8
C
LEARANCE TO COMBUSTIBLES, HORIZONTAL UNITS
I520
HORIZONTAL MODELS MINIMUM CLEARANCE (IN.)
LEFT RIGHT SHIP
A B C D E F
SIDE SIDE
BACK TOP FRONT VENT
WGTS
45 17
1
⁄2 16
11
⁄32 15
5
⁄8 2 16
5
⁄8 13
7
⁄8 0 0 0 1 2* 0 111
60 17
1
⁄2 16
11
⁄32 15
5
⁄8 2 16
5
⁄8 13
7
⁄8 0 0 0 1 2* 0 117
75 17
1
⁄2 16
11
⁄32 15
5
⁄8 2 16
5
⁄8 13
7
⁄8 0 0 0 1 2* 0 123
75 21 19
27
⁄32 19
3
⁄16 2 20
1
⁄8 17
3
⁄8 0 0 0 1 2* 0 123
90 21 19
27
⁄32 19
3
⁄16 2 20
1
⁄8 17
3
⁄8 0 0 0 1 2* 0 148
105 21 19
27
⁄32 19
3
⁄16 2 20
1
⁄8 17
3
⁄8 0 0 0 1 2* 0 152
120 24
1
⁄2 23
11
⁄32 22
5
⁄8 2 23
5
⁄8 20
5
⁄8 0 0 0 1 2* 0 160
*A service clearance of at least 24 inches is recommended in front of all furnaces.
IMPORTANT: This furnace is not approved or recommended for
installation on its back, with access doors facing upwards.
25
13
⁄16
2 DIA.
ALT. GAS
CONNECTION
4
3
⁄8
2 DIA.
GAS
CONNECTION
TONS
2
2.5
3
4
4 & 4.5
4.5
5
INPUT
kBtu