Just Better SH-36N User Manual

A34000

1/4 SAE TEE

W/SWIVEL COUPLE R

MATCHING

REFRIGERAN T

KE Y

TEMPER ATUR E

SENSOR

SUCTION LINE

LIQUID LIN E

CONDENSING

UNIT

REFRIGERAN T

TANK

SUCTION SER VICE

VALV E

QC RESTRICT OR

FITTING

LIQUID LINE

SER VICE VALV E

TEMPER ATUR E

SENSO R

SUPERHEAT

SUBCOOL

SUCTION LINE

LIQUID LIN E

MATCHING

REFRIGERAN T

KE Y

TEMPER ATUR E

SENSOR

CONDENSING UNIT

LIQUID

SE RVICE

VALVE

TEMPER ATUR 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

MATCHING

REFRIGERANT

KEY

TEMPERA TURE

SENSOR

CONDENSING UNIT

TO SUCTIO N SER VICE

VALVE

TEMPERA TURE

SENSOR

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

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

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 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, 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

er)

WET SOCK IN AIR FLOW

TEMPER AT URE

SENSO R

TEMPERA TURE

SENSOR

SUCTION LINE

LIQUID LIN E

REFRIGERAN T

TANK

SUCTION SE RVIC E

VALVE

QC RESTRICT OR

FITTING

LIQUID LINE

SER VICE VALV E

TEMPER ATURE

SENSOR

A34000 1/4 SAE TEE W/SWIVEL COUPLE R

MATCHING

REFRIGERAN T

KE Y

TEMPER ATURE

SENSOR

SUPERHEAT

TARGET SUPERHEAT VALVE

SUPERHEAT

Not intended for use on hazardous or corrosive ﬂuids

GAUGE SPECIFICATIONS: Pressure display range: 29 InHg to 600 psig (-98kPa to 4134 kPa)

(+/- 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)

(+/- 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

Uses one 9v Alkaline battery

(not included)

EXTENDING

AUTO-SHUTOFF TIME

Extend time by 60 minutes by pressing upper button.

Push lower button 2 times to select 1 hour or 24 hours.

SUPERHEAT

REFRIGERANT KE Y

(R410A Included)

TEMPERA TURE

SENSO R

R404A

HP62

PSI/F

MANUFACTURER’S DESIGNATION

“R” NUMBER

UNITS (F or C)

Only a properly charged unit will provide the owner with the design SEER for maximum energy efﬁciency.

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.) Wait 1.5 seconds, then continue pressing to reverse scroll direction.

APPLICATION TIPS: Allow the manifold to Zero at Turn-On:

The manifold displays will zero (CAL) each time the manifold is turned on without pressure . 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.

REFRIGERANT KEY PLUG-IN

See page 4 for other refrigerant keys available. Metric and English keys are not interchangeable.

SH-35N

(°F)

and SH-36N

(°C)

SUPERHEAT and SUBCOOLING GAUGE OPERATING INSTRUCTIONS

REFRIGERATION APPLICATIONS

SETTING FOR THERMOSTAT CONTROLLED CASES AND COOLERS

Without plug-ins, turn on the gauge and zero the display by holding the lower button. Plug in the Temperature Sensor only and toggle to “Temperature.”

SETTING FOR THERMOSTAT CONTROLLED CASES AND COOLERS

Without plug-ins, turn on the gauge and zero the display by holding the lower button. Attempts to zero the gauge with pressure applied will result in (Err) display.

A/C & REFRIGERATION APPLICATIONS

Contact your TXV manufacturer for the exact superheat adjust rate.

0 5 10 15 20 25

Superheat ϒ

Time in Minutes

Expansion Valve Superheat SH-35N Average Superheat

Hussmann RHF A 4 Door FF Case 1Ton Lo w Temp. TXV

-2 F Case T emperature 40% Heater Load

SET SUPERHEAT FOR “HUNTING” TXV VALUES

In refrigeration and air conditioning systems, the expansion valve often operates to produce an evaporator superheat which constantly swings up and down in value, called “hunting.” The SH-35N provides the “Average” superheat value for TXV valve adjustment.

CHECKING TXV SETTING

The objectives of the TXV superheat setting is to prevent liquid refrigerant ﬂoodback to the compresor and to optimize system operation by the use of a selected setting.

The two temperature method of measuring superheat is not recommended because it can produce a wrong superheat measurement, due to the effect of temperature glide of the blended refrigerants and variations in evaporator pressure drop.

NEW RESIDENTIAL A/C SYSTEMS

For new installations of residential A/C systems, the precharge will not provide an accurate amount of refrigerant charge because of the variation in the length of liquid and suction line connecting to the “A” coil.

RETROFITTING SYSTEMS

Retroﬁtting systems to a new refrigerant can change the TXV superheat setting. The superheat setting should be checked before and after retroﬁtting to be sure the superheat is right for the equipment.

REPLACEMENT ITEMS

PART NO. DESCRIPTION

A34000 1/4" QC x 1/4" Access Branch Tee SH-54 6' Temperature Sensor SH-55 Plastic Carrying Case SH-56 Socks (5)

ACCESSORIES

SH-51 28' Temperature Sensor Extension

KEY REFRIGERANT LIST “A”

R11 R12 R13 R22 R23 R134A R290 R401A R401B R402A R402B R403B R404A R406A R407A

R408A R409A R410A R411C R413A R414B R416A R417A R422A R500 R502 R507 R508B RB276

SUPERHEAT

JB INDUSTRIES

630.851.9444 Printed in USA

Part No. 10737-308

Technical service: 800-323-0811 E-Mail:sales@jbind.com Web Site:www.jbind.com

Fahrenheit and Celsius Keys are not interchangeable

SUPERHEAT

TEMPERA TURE

SENSOR

TEMP

PSI

R407B

R407C R422B