Obtaining target superheat value – Just Better SH-35N Superheat Subcooling User Manual
Page 2
TEMP °F
A
WET BULB TEMPERATURE OF EVAPORATOR ENTERING AIR
1. Open to atmosphere. Gauge will automatically calibrate to
“Zero” for altitude and atmospheric pressure changes.
2. Wet the sock with water and slip on to sensor. Mount on the
building return air grill or air return line of blower to measure the
Indoor Wet Bulb temperature.
3. Turn on the furnace fan to create a flow of air across the wet sock
for 5 minutes. The final number will be your Wet Bulb Temperature.
OUTDOOR TEMPERATURE
1. Remove sock and measure the
Outdoor Air Temperature.
B
C
1. Find the outdoor temperature and evaporator entering air wet-
bulb temperature on chart. The target superheat value is at the
intersection of the two.
If you have to do repairs, recheck your temperatures.
2. Make your connections and toggle the gauge to show SUPERHEAT.
For system refrigerants other than R22, scroll to select Refrigerant.
3. Very slowly add or refrigerant to lower superheat or remove
refrigerant to raise superheat until the gauge displays the target
value.
OBTAINING TARGET SUPERHEAT VALUE
JB INDUSTRIES
AURORA, IL 60507 USA
Technical service: 800-323-0811
E-Mail: [email protected]
Web Site:
www.jbind.com
12.5
WET
SOCK
IN AIR
FLOW
TEMPERATURE
SENSOR
TEMPERATURE
SENSOR
SUCTION LINE
LIQUID LINE
REFRIGERANT
TANK
TO
LIQUID LINE
SERVICE VALVE
TEMPERATURE
SENSO R
TEMPERATURE
SENSO R
SUPERHEAT
SUPERHEAT
TARGET
SUPERHEAT VALUE
SUPERHEAT
Sample Superheat Char
t
(Located on condensing unit- for
older models contact manufacturer
.)
EVAPORATOR ENTERING AIR- F° Wet Bulb Temperature
OUTDOOR
A34000
1/4” SAE TEE
W/ SWIVEL COUPLER
QC RESTRICTOR
FITTING
TO SUCTION
SERVICE VALVE
55
60
65
70
75
80
85
90
95
100
105
110
115
50
52
54
56
58
60
62
64
66
68
70
72
74
76
9
7
12
10
6
14
12
10
6
17
19
12
16
10
21
23
13
15
13
16
18
20
6
5
9
8
26.9
24.3
21.9
19.6
16.2
29
14
18
21
24
27
30
32
9
15
18
21
24
27
6
1
30
27
10
13
15
8
5
16
19
21
24
33
35
12
9
6
37
20
22
25
28
30
33
35
17
20
11
13
15
18
8
40
38
22
24
26
28
31
33
36
15
14
42
40
38
18
20
22
23
25
27
30
31
34
36
27
29
31
33
35
37
39
41
43
45
23
25
26