# Pressure Temperature Sample Chart

Conversions and Formulas
Pressure Temperature Chart
800.497.6805
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COIL TEMPERATURE CHART INSTRUCTIONS
Select design temperature for your evaporator and condenser-
Match to approx. operational pressures.
NU-22 - 120° condensing / 40° evaporator
approx. 234 psig head / 60 psig suction
Hot Shot - 100° condensing / 28° evaporator
approx. 126 psig head / 26 psig suction
NU-22 - 100° condensing / -30° evaporator
approx. 176 psig head / 3 psig evaporator
Hot Shot - 100° condensing / -20 evaporator
approx. 126 psig head / 0 psig suction
CUBIC FEET x 7.480 = GALLONS
2.307 = FEET of WATER
PSI x 2.30 = IN HG
27.7 = IN. WATER COLUMN
2547 = BTUH
HORSEPOWER
x
745.7 = WATTS
WATTS x 3.413 = BTUH
x
3413 = BTUH
1.34 = HORSEPOWER
CENTIGRADE x 1.8 + 32 = FAHRENHEIT
Single Phase
W = Watts
I = Amperes
E = Voltage
R = Ohms
To obtain any value in the center circle, perform the operation
in the adjacent segment of the outer circle.
Full Load Current =
Watts
(1 Ø)
Voltage
Full Load Current =
Watts
(3 Ø)
1.732 x Voltage
Volts = Amps x Resistance
Watts = Volts x Amps
WATER SIDE - Chillers,
Condensers
BTUH = 500 x GPM x
T
BTUH
500 x GPM
GALLON of WATER = 8.33 lbs.
8.33 lbs/GAL x 60 = 500 lbs/hr
DENSITY = 62.4 lbs/cubic ft
GPM x Ft. Water
Pump Eff. x 3960
Approx. Weights of Refrigerant in CU lines - lbs/100 Lineal Feet
Line Size Refrigerant Suction Liquid Line Size Refrigerant Suction Liquid
O.D. in. Line Line O.D. in. Line Line
R-12 0.06 4.30 R-12 0.63 45.90
R414B 0.06 3.40 R414B 0.50 36.70
3
/
8
R22 0.08 3.90
1
1
/
8
R22 0.87 41.60
R417A 0.08 3.80 R417A 0.85 40.77
R12 0.11 8.10 R12 0.96 69.90
R414B 0.09 6.50 R414B 0.77 55.90
1
/
2
R22 0.15 7.40
1
3
/
8
R22 1.33 63.50
R414A 0.15 7.25 R414A 1.30 62.23
R12 0.19 12.90 R12 1.36 99.00
R414B 0.15 10.30 R414B 1.10 79.20
5
/
8
R22 0.25 11.80
1
5
/
8
R22 1.88 90.00
R417A 0.25 11.56 R417A 1.84 88.20
R12 0.37 26.90 R12 2.40 172.00
R414B 0.30 21.50 R414B 1.89 137.60
7
/
8
R22 0.51 24.40
2
1
/
8
R22 3.26 156.00
R417A 0.50 23.91 R417A 3.19 152.88
(Does not apply to residential appliances)
Air Cooled condensing unit
INDOOR - NO FAN CYCLING - per HP
• Hot Shot - Two (2) pounds
• NU-22 - Three (3) pounds
• Plus the liquid line weight
OUTDOOR - FLOODED CONDENSER - per HP
• Hot Shot - Four (4) pounds
• NU-22 - Five (5) pounds
• Plus the liquid line weight
OUTDOOR FAN CYCLING - per HP
• Hot Shot - Three (3) pounds
• NU-22 - Four (4) pounds
• Plus the liquid line weight
WATER COOLED CONDENSING UNIT - per HP
• Hot Shot - One (1) pound
• NU-22 - Two (2) pounds
• Plus the liquid line weight
* NU-22 RESIDENTIAL A/C APPLICATIONS
USE A 1 / 1 CHARGING RATIO
AIR COILS - In BTUH
Qsensible = 1.08 x CFM x
T
Qlatent = 0.68 x CFM x
SH
Qtotal = 4.5 x CFM x
H
Q = Heat Flow in BTUH
SH = Specific Humidity
(grains of moisture)
H = Enthalpy
Always unload the cylinder in liquid phase. Don’t clear the sightglass. As temperature
approaches design, verify superheat, adjust charge if necessary to optimize performance.
W I
R E
E
2
R
E
2
W
W
I
2
1
2
x R
E x 1
1 x R
W x R
E
R
W
E
W
I
E
I
W
R
ICOR International Coil Temperature Chart
HOT SHOT and NU-22
Evaporator Condensing
Design
Temp. °F
-40
-38
-36
-34
-32
-30
-28
-26
-24
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2
4
6
NU-22
PSIG
0.2
0.5
1.0
1.8
2.5
3.4
4
5
6
7
8
9
10
11
12
14
15
16
18
19
20
22
24
25
Hot Shot
PSIG
1
0.5
0.2
0.1
0
0.5
1
2
3
4
5
6
7
8
9
10
11
12
Hot Shot
PSIG
13
14
15
16
17
18
19
22
24
25
26
28
30
32
34
36
38
40
42
44
46
48
50
52
Design
Temp. °F
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
NU-22
PSIG
27
28
30
32
34
36
38
40
42
44
46
48
51
53
55
58
61
63
66
69
72
75
78
81
NU-22
PSIG
151
156
161
166
171
176
182
187
193
198
204
210
216
Hot Shot
PSIG
106
110
112
116
121
126
131
136
141
145
149
154
159
Design
Temp. °F
116
118
120
122
124
126
128
130
132
134
136
138
140
NU-22
PSIG
222
228
234
241
248
254
261
267
275
282
289
317
305
Hot Shot
PSIG
164
169
174
180
184
190
196
200
204
210
216
222
227
Design
Temp. °F
90
92
94
96
98
100
102
104
106
108
110
112
114
KILOWATT
T =
CHARGING TIPS-
REFRIGERATION APPLICATIONS
Pump HP=
Page 1/2

## Pressure Temperature Sample Chart PDF

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