Table of Contents
Advertisement
50TFF012 (8.3 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
62
TC
95.1
75
SHC
77.4
kW
7.39
TC
88.9
85
SHC
79.9
kW
7.91
TC
81.8
95
SHC
76.4
kW
8.64
TC
74.2
105
SHC
72.1
kW
9.06
TC
67.4
115
SHC
67.3
kW
9.71
TC
63.2
125
SHC
63.2
kW
10.37
50TFF014 (10.2 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
62
TC
125.1
75
SHC
107.5
kW
9.48
TC
115.4
85
SHC
103.1
kW
10.15
TC
105.5
95
SHC
98.9
kW
10.83
TC
94.1
105
SHC
92.7
kW
11.54
TC
86.9
115
SHC
86.8
kW
12.26
TC
79.9
125
SHC
79.9
kW
13.00
LEGEND AND NOTES FOR COOLING CAPACITY TABLES — ENGLISH
LEGEND
BF
— Bypass Factor
Edb
— Entering Dry Bulb Temperature (F)
Ewb
— Entering Wet Bulb Temperature (F)
kW
— Compressor Motor Power Input
SHC
— Sensible Heat Capacity (1000 Btuh)
TC
— Total Capacity (1000 Btuh)
NOTES:
1. Ratings are gross, and do not account for the effects of the evaporator-fan
motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. SHC is based on 80 F db temperature of air entering the unit. At any
other temperature, correct the SHC read from the table of cooling capaci-
ties as follows:
Corrected SHC
Btuh
= SHC + [1.10 x (1 – BF) x (F
Observe the rule of sign. Above 80 F, SHC correction will be positive; add
it to SHC. Below 80 F, SHC correction will be negative; subtract it from
SHC.
COOLING CAPACITIES — ENGLISH (cont)
2500/0.09
67
72
62
108.3
116.7
104.5
64.2
77.2
87.6
7.69
7.83
7.55
102.3
112.0
98.5
69.3
55.1
93.5
8.24
8.42
8.08
94.7
107.2
91.2
66.2
53.8
89.5
8.94
8.85
8.77
86.4
101.8
83.4
62.8
51.8
83.4
9.42
9.74
9.26
77.2
94.2
75.6
59.1
49.5
75.6
10.04
10.42
9.97
69.2
84.4
68.5
56.0
46.0
68.5
10.68
11.09
10.69
Air Entering Evaporator — Cfm/BF
3150/0.13
Air Entering Evaporator — Ewb (F)
67
72
62
137.3
147.5
133.0
90.6
71.7
125.8
9.60
9.69
9.58
129.6
140.9
124.4
87.7
69.8
120.8
10.33
10.49
10.29
122.0
134.4
115.8
84.8
67.8
115.7
11.06
11.30
11.01
112.2
126.9
106.5
81.2
65.3
106.5
11.83
12.10
11.76
100.4
117.9
96.5
76.4
62.5
96.5
12.55
12.91
12.58
88.5
108.8
86.4
71.7
59.6
86.3
13.29
13.72
13.40
– 80) x cfm]
db
Air Entering Evaporator — Cfm/BF
3200/0.105
Air Entering Evaporator — Ewb (F)
67
72
62
112.8
121.4
106.2
70.1
82.0
101.9
7.74
8.00
7.5
108.3
116.9
101.8
77.7
60.0
100.3
8.34
8.60
8.10
102.5
110.9
96.8
76.0
58.1
96.7
9.08
8.96
8.8
95.2
105.3
89.7
73.4
56.9
89.7
9.56
9.88
9.4
83.8
99.0
81.3
68.9
55.1
81.2
10.19
10.59
10.1
71.8
88.8
73.1
64.3
51.9
73.0
10.85
11.27
10.9
4200/0.17
67
72
62
143.5
154.1
135.1
101.9
78.7
134.0
9.67
9.79
9.59
135.9
147.3
128.9
99.8
77.0
128.3
10.43
10.61
10.34
128.2
140.4
122.7
97.8
75.3
122.7
11.20
11.41
11.11
118.9
132.4
115.2
94.8
73.2
115.2
11.98
12.22
11.92
105.3
123.7
104.6
89.8
70.5
104.6
12.74
13.07
12.73
91.7
115.0
94.1
84.8
67.8
99.1
13.49
13.91
13.55
4. Formulas:
F
= F
–
ldb
edb
Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air
leaving coil (h
lwb
h
= h
–
lwb
ewb
Where h
is enthalpy of air entering evaporator coil (kJ/kg).
ewb
3800/0.12
67
72
62
114.9
124.4
107.0
74.6
84.7
95.0
7.81
8.10
7.56
110.3
119.2
102.7
83.4
63.7
102.2
8.39
8.69
8.15
104.4
113.7
98.0
82.1
61.4
98.0
9.15
9.03
8.91
98.2
107.6
91.3
80.5
60.8
91.3
9.65
9.96
9.48
87.4
100.6
82.8
76.3
59.0
82.7
10.28
10.66
10.19
75.0
92.3
74.2
70.9
56.9
74.2
10.95
11.37
10.93
5100/0.21
67
72
145.6
156.1
109.7
83.1
9.69
9.83
138.6
149.9
108.6
82.1
10.48
10.66
131.5
143.6
107.6
81.2
11.27
11.47
122.6
135.8
105.6
79.4
12.06
12.31
109.2
126.2
100.4
77.2
12.83
13.14
96.0
116.5
94.6
74.8
13.62
13.96
SHC
Btuh
1.09 x cfm
).
TC
Btuh
4.50 x cfm
4000/0.13
67
72
115.8
124.2
75.9
32.4
7.84
8.10
110.8
119.0
85.1
64.4
8.41
8.67
105.0
114.2
83.9
63.2
9.17
4.60
98.7
108.0
82.6
61.7
9.66
9.98
88.4
101.0
78.7
60.1
10.31
10.68
76.0
93.0
73.0
58.4
10.97
11.41
21
Hide quick links:
Advertisement
Table of Contents
