SH-35N(°F)and SH-36N(°C)
SUPERHEAT and SUBCOOLING GAUGE
OPERATING INSTRUCTIONS
Only a properly charged unit will provide the owner with the design SEER for maximum energy efficiency.
SUPERHEAT
SUPERHEAT, TEMPERATURE,
SUBCOOLING AND PRESSURE
PUSH once to toggle between displays
PUSH 2 times to recall High, Low & Average
Hold down to clear memory.
ON/OFF
PUSH once to “Turn On”
Display shows LAST refrigerant used. HOLD down to "Turn Off"
PUSH 2 times to select 1 hour or 24 hour auto-off mode
REFRIGERANT SELECTION
PRESS once at any time to display current refrigerant. Continue pressing to scroll the refrigerant list.
(See list of refrigerants on page 4.)
TEMPERATURE
SENSOR
2 
1 
EXTENDING
AUTO-SHUTOFF TIME
Extend time by 60 minutes by pressing upper button.
Uses one 9v Alkaline battery (not included)
Not intended for use on hazardous or corrosive fluids
GAUGE SPECIFICATIONS: |
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Pressure display range: |
29 InHg to 600 psig (-98kPa to 4134 kPa) |
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(+/- 1 PSI to 200 psi, 0.5% to 600 psi) |
Temperature display range: |
-40°F to 200°F (-40°C to 93°C) |
Operating temperature: |
-10°F to 120°F (-12°C to 49°C) |
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(+/- 1°F * 32°F/120°F, +/- 1.5°F * -10°F/32°F) |
Maximum overpressure: |
800 psig (5512 kPa) |
Battery life and type: |
100 hours/ 9vAlkaline battery |
Auto-shutoff time: |
60 minutes (extended 60 minutes by upper button action) |
Refrigerant data source: |
NIST REFRPRO software and manufacturers data |
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APPLICATION TIPS:
Allow the manifold to Zero at Turn-On:
The manifold displays will zero (CAL) each time the manifold is turned on open to atmosphere. Zeroing the gauge compensates the Pressure display for changes in (1) Altitude and (2) Barometric pressure.
Pressure Calibration
Don’t be alarmed if your manifold gauge does not agree with your mechanical gauges. The digital manifold is calibrated with a very accurate pressure and is not affected by vibration, motion or position.
Extending On-Time
The digital manifold will turn off automatically after 60 minutes to save battery life.
If any button is touched the digital manifold will stay on for another 60 minutes.
Over/Under-Range Indicator
Pressures or temperatures below or above the rated ranges will cause a “1” to be displayed.
Low Battery Indicator
Low batteries will be indicated by a blinking display.
Batteries For Low Temperature Applications
Using the gauge in a low temperature conditions will shorten battery life. Change to the 9 volt Lithium battery (Radio Shack 23-665) to solve this problem.
OBTAINING TARGET SUPERHEAT VALUE
A |
WET BULB TEMPERATURE OF EVAPORATOR ENTERING AIR |
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1. |
Open to atmosphere. Gauge will automatically calibrate to |
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“Zero” for altitude and atmospheric pressure changes. |
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2. |
Wet the sock with water and slip on to sensor. Mount on the |
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building return air grill or air return line of blower to measure the |
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Indoor Wet Bulb temperature. |
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3. |
Turn on the furnace fan to create a flow of air across the wet sock |
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for 5 minutes. The final number will be your Wet Bulb Temperature. |
WET
SOCK
IN AIR
FLOW
SUPERHEAT
TEMPERATURE
SENSOR
Sample |
Superheat |
Chart |
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- for |
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(Located on condensing |
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older |
models |
contact |
manufacturer |
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OUTDOOR |
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EVAPORATOR ENTERING AIR- F° Wet Bulb Temperature |
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TEMP °F |
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50 |
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54 |
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56 |
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58 |
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60 |
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62 |
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64 |
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66 |
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68 |
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70 |
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72 |
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74 |
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76 |
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52 |
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55 |
9 |
12 |
14 |
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17 |
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20 |
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23 |
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26.9 |
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29 |
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32 |
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35 |
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37 |
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40 |
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42 |
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45 |
60 |
7 |
10 |
12 |
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15 |
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18 |
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21 |
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24.3 |
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27 |
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30 |
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33 |
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35 |
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38 |
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40 |
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43 |
65 |
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6 |
10 |
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13 |
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16 |
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19 |
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21.9 |
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24 |
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27 |
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30 |
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33 |
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36 |
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38 |
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41 |
70 |
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6 |
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10 |
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13 |
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16 |
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19.6 |
21 |
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24 |
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27 |
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30 |
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33 |
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36 |
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39 |
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75 |
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6 |
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9 |
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12 |
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16.2 |
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18 |
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21 |
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24 |
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28 |
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31 |
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34 |
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37 |
80 |
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5 |
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8 |
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15 |
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18 |
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21 |
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25 |
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28 |
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31 |
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35 |
85 |
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12.5 |
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1 |
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15 |
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19 |
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22 |
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26 |
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30 |
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33 |
90 |
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9 |
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13 |
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16 |
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20 |
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24 |
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27 |
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31 |
95 |
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6 |
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10 |
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14 |
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18 |
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22 |
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25 |
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29 |
100 |
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8 |
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12 |
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15 |
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20 |
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23 |
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27 |
105 |
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5 |
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9 |
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13 |
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17 |
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22 |
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26 |
110 |
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6 |
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11 |
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15 |
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20 |
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25 |
115 |
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8 |
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14 |
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18 |
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23 |
B |
TEMPERATURE |
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SENSOR |
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SUPERHEAT |
C |
SUPERHEAT |
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TEMPERATURE |
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SENSO R |
TARGET |
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SUPERHEAT VALUE |
SERVICE VALVE |
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TO |
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LIQUID LINE |
A34000 |
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1/4” SAE TEE |
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W/ SWIVEL COUPLER |
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QC RESTRICTOR |
TO SUCTION |
FITTING |
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SERVICE VALVE |
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LIQUID LINE |
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SUCTION LINE |
REFRIGERANT |
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TANK |
TEMPERATURE |
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SENSO R |
OUTDOOR TEMPERATURE
1.Remove sock and measure the Outdoor Air Temperature.
JB INDUSTRIES
AURORA, IL 60507 USA
Technical service: 800-323-0811
E-Mail: sales@jbind.com
Web Site: www.jbind.com
1.Find the outdoor temperature and evaporator entering air wetbulb 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.
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