AAF HermanNelson IM 725 Installation Manual - page 14
14
IM 725 (1-02)
Heating Coils
00 = None
Cooling Coils
V = 2 Row CW Coil
S = 3 Row CW Coil
W = 4 Row CW Coil
Y = 5 Row CW Coil
5 = 2 Row High Capacity CW Coil
6 = 3 Row High Capacity CW Coil
Heating Only
Figure 32 - Hot Water Heating Only Unit
(Coils 65, 66, 67)
Cooling Only
Unit Series
S07
S10
S13
S15
Suction Line O.D. (in/mm)
3
⁄
4
19
3
⁄
4
19
7
⁄
8
22
7
⁄
8
22
Liquid LIne O.D. (in/mm)
1
⁄
4
6.35
1
⁄
4
6
3
⁄
8
10
3
⁄
8
10
Notes:
1. All coils have same end supply and return connections.
2. Steam coils have a factory installed pressure equalizing valve and a 24" (610mm) long
pressure equalizing line which terminates in a
1
⁄
2
" M.P.T. fitting.
3. Steam/hot water connections may be same end as cooling coil connections, but they
are recommended to be opposite end to facilitate piping. (Must be opposite end when
using AAF controls.)
4. Cooling condensate connection is shipped same end as cooling coil connections, but
is field reversible.
5. Electric heating coil power connections are right end only. Junction box has 1"(25mm)
and 2" (51mm) (trade size) knockouts, 10
1
⁄
2
" (267mm) from right end of the unit.
6. For limitations with coil combinations see tables 151-1, 151-2, 152-1 and 153-1.
7. Coil stubs are
7
⁄
8
" I.D. (female) and terminate 9" (229mm) from the end of the unit.
8. Steam coils are 1
1
⁄
8
" female (sweat) connections and terminate 9” (229mm) from the
end of the unit.
9. DX coils (G) have O.D. sweat connections. Interconnecting tube by others. See table
7 for correct tubing size.
Table 6 - Dimensions
Table 7 - DX Coil (G) Connection Tubing
L.H. Connections
A
B
R
S
J
11
5
⁄
8
(295 mm)
13
3
⁄
8
(340 mm)
13
3
⁄
8
(340 mm)
11
5
⁄
8
(295 mm)
S
R
A
B
J
S = Supply
R = Return
A
C
R
S
J
7
3
⁄
8
(187 mm)
11
5
⁄
8
(295 mm)
11
5
⁄
8
(295 mm)
S
R
C
A
J
7
3
⁄
8
(187 mm)
Junction
Box
H
J
Electric Heating
Only
S = Supply
R = Return
R.H. Connections
L.H. Connections
R.H. Connections
R.H. Connections
13
3
⁄
4
(349 mm)
Table 4 - Heating Only – Coil 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
AVV
AVV Elec.
65
66
67
68
69
78
79
Z
X
X
12
13
Z
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
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
Cooling Coils
Z = None
Table 5 - Cooling Only – Coil 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
AVV
V
S
W
Y
00
X
X
5
6
7
8
G
00
X
7 = 4 Row High Capacity CW Coil
8 = 5 Row High Capacity CW Coil
G = Direct Expansion Coil
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
B
D
LL
SL
J
11
3
⁄
8
(289 mm)
13
3
⁄
8
(340 mm)
11
3
⁄
8
(289 mm)
C
D
J
7
3
⁄
8
(187 mm)
SL
LL
S
= Supply
R
= Return
Figure 35 - Chilled Water Only Unit
(Coils S, W, Y, V, 5, 6, 7, 8)
Figure 36 - Direct Expansion Cooling Only Unit (Coil G)
R.H. Connections
L.H. Connections
R.H. Connections
LL = Liquid Line
SL = Suction Line
Air Flow
Air Flow
Air
Flow
Air
Flow
Air Flow
Air Flow
Air Flow
Air Flow
Air Flow
Unit
Dimensions
Depth
A
B
C
D
E
F
G
H
J
in
16
5
⁄
8
6
3
⁄
8
10
5
⁄
8
4
5
⁄
8
6
5
⁄
8
4
8
3
⁄
8
2
1
⁄
4
14
2
7
⁄
8
mm
422
162
270
117
168
102
213
57
356
73
in
21
7
⁄
8
11
5
⁄
8
15
7
⁄
8
9
7
⁄
8
11
7
⁄
8
9
1
⁄
4
13
5
⁄
8
7
1
⁄
2
19
1
⁄
4
8
1
⁄
8
mm
556
295
403
251
302
235
346
191
489
206
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.
Figure 33 - Steam Heating Only Unit
(Coils 68, 69, 78, 79)
Figure 34 - Electric Heating Only Unit
(Coils 12, 13)
Coil Headers, Locations