User guide
A34000
1/4 SAE TEE
W/SWIVEL
COUPLE R
MATCHING
REFRIGERAN T
KE Y
TEMPER AT UR E
SENSOR
SUCTION LINE
LIQUID LIN E
CONDENSING
UNIT
REFRIGERAN T
TANK
TO
SUCTION SER VICE
VALV E
QC RESTRICT OR
FITTING
TO
LIQUID LINE
SER VICE VALV E
TEMPER AT UR E
SENSO R
SUPERHEAT
SUBCOOL
SUCTION LINE
LIQUID LIN E
MATCHING
REFRIGERAN T
KE Y
TEMPER AT UR E
SENSO R
CONDENSING UNIT
TO
LIQUID
SE RV ICE
VALV E
TEMPER AT UR E
SENSOR
SUPERHEAT
SUBCOOL
SUCTION LINE
LIQUI D
LINE
TEMPERA TURE
SENSOR
EX PA NSION
VALV E
MATCHING
REFRIGERANT KE Y
EVAPORA TOR
TEMPERA TURE
SENSOR
SUPERHEAT
SUBCOOL
1. Connect the gauge to the A34000 tee fitting on
the high (liquid) side of the manifold as shown.
2. Install the Temperature Sensor on the liquid line
next to the liquid service valve and plug into
gauge.
3. For system refrigerants other than R-22, plug in
the matching Refrigerant Key into the gauge.
4. Toggle the gauge display to show
SUBCOOLING.
5. Very slowly add or remove refrigerant until the
gauge displays the required Subcooling value.
SUPERHEAT TEST
SUCTION LINE
LIQUID LI NE
MATCHIN G
REFRIGERANT
KEY
TEMPERA TURE
SENSOR
CONDENSING UNIT
TO
SUCTIO N
SER VICE
VALV E
TEMPERA TURE
SENSO R
SUPERHEAT
SUPERHEAT
SUBCOOLING TEST
1. Turn on the gauge.
2. For refrigerants other than R-22, plug in the
matching Refrigerant Key.
TESTING FOR CHARGE
EVAPORA TOR
SUCTION LINE
LIQUI D
LINE
EXP ANSION
VALV E
MATCHING
REFRIGERANT
KE Y
TEMPERA TUR E
SENSO R
TEMPERA TUR E
SENSO R
SUPERHEAT
SUPERHEAT
2. Plug in the Temperature Sensor and mount the
sensor as shown.
3. Toggle the display to show Superheat or
Subcooling.
CHARGING
BY THE SUBCOOLING METHOD
APPLICATIONS
?
Refrigeration Systems
?
High Efficiency Residential
?
Large Commercial A/C Rooftop
Packages Up To And Over 100 Tons
Average Subcooling Value is 10°–12°.
Contact manufacturer or wholesaler for specific temperatures.
Systems With TXV And No Receiver
OUTDOOR
TEMP°F
EVAPORATOR ENTERING AIR -°F.Wet-Bulb Temperature
50 52 54 56 58 60 62 64 66 68 70 72 74 76
55 9 12 14 17 20 23 26.9 29 32 35 37 40 42 45
60 7 10 12 15 18 21 24.3 27 30 33 35 38 40 43
65 6 10 13 16 19 21.9 24 27 30 33 36 38 41
70 7 10 13 16 19.6 21 24 27 30 33 36 39
75 6 9 12 16.2 18 21 24 28 31 34 37
80 5 8 13.3 15 18 21 25 28 31 35
85 12.5 11 15 19 22 26 30 33
90 10.2 9 13 16 20 24 27 31
95 6 10 14 18 22 25 29
100 8 12 15 20 23 27
105 5 9 13 17 22 26
110 6 11 15 20 25
115 8 14 18 23
A
WET BULB TEMPERATURE OF EVAPORATOR ENTERING AIR
1. Turn on with zero pressure. 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, plug in matching Refrigerant
Key.
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:sales@jbind.com
Web Site:www.jbind.com
12.5
Sample Superheat Chart
(Located on condensing unit.
For older models contact manufactu
r
er)
WET
SOCK
IN AIR
FLOW
TEMPER AT URE
SENSO R
TEMPERA TURE
SENSOR
SUCTION LINE
LIQUID LIN E
REFRIGERAN T
TANK
TO
SUCTION SE RV ICE
VALV E
QC RESTRICT OR
FITTING
TO
LIQUID LINE
SER VICE VALV E
TEMPER AT UR E
SENSO R
A34000
1/4 SAE TEE
W/SWIVEL
COUPLE R
MATCHING
REFRIGERAN T
KE Y
TEMPER AT UR E
SENSO R
SUPERHEAT
SUPERHEAT
SUPERHEAT
TARGET
SUPERHEAT VALVE
SUPERHEAT