AAF HermanNelson IM 725 Installation Manual - page 15
IM 725 (1-02)
15
Heat/Cool
See Notes and Tables 6 and 7 on page 14
Table 8 - Heat/Cool Position/Combinations In Air Stream (one coil per position) Note: X indicates Available.
Face and Bypass
Valve
First Position in Air Stream
Second Position in Air Stream
AVS
AVS Elec.
AVV
AVV Elec.
U
D
E
F
00
X
X
1
2
3
4
65
66
67
68
69
78
79
V
S
5
6
X
X
65
66
W
7
X
X
G
65 66
67
68
69
78
79
X
X
G
12 13
X
12
13
V
S
W
5
6
7
X
V
S
W
5
6
7
12
X
Heating Coils
65 = 1 Row Hot Water Coil
66 = 2 Row Hot Water Coil
67 = 3 Row Hot Water Coil
68 = Low Capacity Steam Coil
Cooling Coils
U = 2 Row CW/HW 2-Pipe Coil
D = 3 Row CW/HW 2-Pipe Coil
E = 4 Row CW/HW 2-Pipe Coil
F = 5 Row CW/HW 2-Pipe Coil
1 = 2 Row High Capacity CW/HW 2-Pipe Coil
2 = 3 Row High Capacity CW/HW 2-Pipe Coil
3 = 4 Row High Capacity CW/HW 2-Pipe Coil
4 = 5 Row High Capacity CW/HW 2-Pipe Coil
V = 2 Row CW Coil
S = 3 Row CW Coil
W = 4 Row CW Coil
5 = 2 Row High Capacity CW Coil
6 = 3 Row High Capacity CW Coil
7 = 4 Row High Capacity CW Coil
G = Direct Expansion Coil
69 = High Capacity Steam Coil
78 = Opposite End Drain Low Capacity Steam Coil
79 = Opposite End Drain High Capacity Steam Coil
12 = Low Electric Heat Coil
13 = High Electric Heat Coil
00 = None
L.H. Connections
A
B
S
R
J
11
5
⁄
8
(295 mm)
13
3
⁄
8
(340 mm)
13
3
⁄
8
(340 mm)
11
5
⁄
8
(295 mm)
R
S
A
B
J
E
F
R
S
J
13
7
⁄
8
(352 mm)
15
5
⁄
8
(397 mm)
13
3
⁄
8
(340 mm)
11
5
⁄
8
(295 mm)
R
S
A
B
J
H
W
C
oi
l
C
W
C
oil
E
F
S
R
J
11
5
⁄
8
(295 mm)
7
3
⁄
8
(187 mm)
R
S
C
A
J
S
te
am
C
W
C
oil
D
B
J
11
3
⁄
8
(289 mm)
13
3
⁄
8
(340 mm)
R
S
E
F
J
H
W
C
oi
l
13
7
⁄
8
(352 mm)
15
5
⁄
8
(397 mm)
R
S
G
E
J
9
5
⁄
8
(244 mm)
13
7
⁄
8
(352 mm)
Junction
Box
H
J
Figure 37 - Chilled/Hot Water (2-pipe) Unit
(Coils D, E, F, U, 1, 2, 3, 4)
Figure 38 - Chilled Water and Hot Water Unit
Cooling Coils S, W, V, 5, 6, 7 Heating Coils 65, 66, 67
Figure 39 - Chilled Water and Steam Unit
Cooling Coils S, W, V, 5, 6, 7
Heating Coils 68, 69, 78, 79
Figure 40 - Direct Expansion (G) and Hot Water Unit
Cooling Coil G Heating Coils 65, 66, 67
Figure 41 - Direct Expansion (G) and Steam Unit
Cooling Coil G Heating Coils 68, 69, 78, 79
Figure 42 - Direct Expansion and Electric Heating
Cooling Coils G Heating Coils 12, 13
S = Supply
R = Return
S = Supply
R = Return
S = Supply
R = Return
R.H. Connections
L.H. Connections
R.H. Connections
L.H. Connections
R.H. Connections
S
= Supply
R
= Return
LL = Liquid Line
SL = Suction Line
Heating Dimensions Shown
R.H. Connections
R.H. Connections
Cooling Dimensions Shown
Heating Dimensions Shown
13
7
⁄
8
(352 mm)
15
5
⁄
8
(397 mm)
LL
SL
D
B
J
11
3
⁄
8
(289 mm)
13
3
⁄
8
(340 mm)
S
te
am
LL
SL
13
3
⁄
4
(349 mm)
D
C
11
3
⁄
8
(289 mm)
7
3
⁄
8
(187mm)
Air Flow
Air Flow
Air
Flow
Air Flow
Air
Flow
Air
Flow
Air Flow
Air
Flow
Air Flow
Air
Flow
Air
Flow
Cooling Dimensions Shown
Heating Dimensions Shown
S
= Supply
R
= Return
LL = Liquid Line
SL = Suction Line
LL
SL
LL
SL
C
7
3
⁄
8
(187 mm)
C
LL
SL
7
3
⁄
8
(187 mm)
Junction
Box
H
J
Figure 44 - Chilled Water (2nd Position) and Electric Heating
Cooling Coils V, S, W, 5, 6, 7 Heating Coils 12,13
R.H. Connections
13
3
⁄
4
(349 mm)
13
7
⁄
8
(352 mm)
15
5
⁄
8
(397 mm)
R
S
Air Flow
H
J
Figure 43 - Chilled Water (1st Position) and Electric Heating
Cooling Coils V, S, W, 5, 6, 7 Heating Coils 12,13
R.H. Connections
13
3
⁄
4
(349 mm)
Junction
Box
Air Flow
13
3
⁄
8
(340 mm)
11
5
⁄
8
(295 mm)
R
S
B
A
Cooling Dimensions Shown
L.H. Connections
Heating Dimensions Shown
R.H. Connections
Cooling Dimensions Shown
L.H. Connections
Note: For opposite end drain steam coils (code 78,79) Return (R) is 7
1
⁄
4
" (184mm) from bottom of unit and C - 2
7
⁄
8
" (73mm) from back of unit.
Coil Headers, Locations (Continued)