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Fieldpiece SMAN2 - 3-Port Digital Manifold User Manual

Fieldpiece, Quick start, Certifications

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Quick Start

1 Power on your SMAN by holding the ON/OFF

button for 1 second.

2 Select desired units (English or Metric) by

pressing the UNITS button (SMAN3) or hold-

ing the ENTER button for 1 second (SMAN2).

3 Connect hoses and pipe clamps to the system.

4 Press the circular button to select between

Actual Superheat and Subcooling, Target

Superheat, Direct Temperature Display (T1 T2

Direct) or Saturation Temperature Display.

Certifications

C-Tick (N22675)

CE

RoHS Compliant

Description

Your SMAN is the portable digital refrigerant

manifold and vacuum gauge (SMAN3) for A/C

and refrigeration professionals. Your SMAN

combines high pressure manifold gauges, a

superheat/subcooling calculator, micron gauge

for vacuum (SMAN3), and dual temperature

measurements into one easy-to-use instrument.

Your SMAN calculates and displays target

superheat and actual superheat to ensure

proper charging of a unit. Your SMAN can

also display the liquid and vapor saturation

temperatures in Saturation mode to help you

trouble shoot your system.

Your SMAN is designed to meet the demands

of the HVAC/R professional with a ruggedized

rubber boot for durability, a strong metal

hanger for easy storage and a high quality,

water resistant nylon pouch. A bright blue

backlight and very large, easily viewable display

lets you see your measurements in any work

environment. SMAN has a very intuitive user

interface and extremely long battery life.

Your SMAN comes pre-programmed with

the most accurate P-T charts for 44 of the most

common refrigerants in the field so you are

always prepared for any job.

Fieldpiece

Digital Manifold &

Vacuum Gauge

OPERATOR'S MANUAL

Models SMAN2 SMAN3

Controls

T1

T2

Atmospheric

Pressure

Superheat

Subcooling

T1 T2 Direct

Saturation

Target

Superheat

CAL

CAL

CAL

CAL

Test

Pressure

AUTO

OFF

Refrigerant

ON/OFF

Enter

Units

Alarm

Digital Manifold + Vacuum Gauge

SMAN3

1 Insert K-type thermocouple plugs here.

2 Temperature calibration pots.

3 Press to zero atmospheric pressure.

4 Press to linear adjust pressure curve. (See

Advanced Pressure Calibration section.)

5 Press to engage backlight. Hold when

powering on to toggle Auto Power Off.

6 Press/hold to cycle through refrigerants.

7 Hold 1 second to toggle power on/off.

8 Press up or down arrow to adjust values.

9 Press to confirm selection. For the

SMAN2, hold 1 second to adjust units.

10 Press to turn on/off the Hi/Lo vacuum alarms

and hold to change alarm settings.

11 Press to toggle through temperature tests.

12 Press to adjust units. (SMAN3)

13 Turn clockwise to close Low side port.

14 Turn clockwise to close High side port.

Functions

Standard Pressure

1 Connect your SMAN to the system using EPA approved 1/4in

refrigerant hoses.

2 Read pressures directly from the upper display.

Superheat and Subcooling

1 Press circular button to cycle through temperature modes until SH

and SC are shown. The SMAN can show superheat and subcooling

simultaneously.

2 Choose the appropriate refrigerant using the REFRIGERANT

button.

3 Connect the K-type thermocouple and EPA approved refrigerant

hoses to your SMAN.

4 Connect your SMAN to the system:

Superheat: Hand tighten low side hose to suction line service

port. Place the thermocouple on the suction line between the

evaporator and compressor, no closer than 6 inches to compressor.

Subcooling: Hand tighten high side hose to liquid line service

port. Attach the thermocouple on the liquid line between the

condenser and expansion valve (TXV), as close to the service port

as possible.

5 After turning the system on or making any adjustments to

the system wait 15 minutes before charging by superheat or

subcooling to ensure that the system is stable and running

normally. Add or remove refrigerant using the low and high side

valves as needed. Let system stabilize again for 15 minutes.

Saturation

Shows vapor (VSAT) and liquid (LSAT) saturation temperatures

calculated from the pressures measured and the refrigerant selected.

T1 T2 Direct

1 Press circular button until T1 and T2 are shown.

2 Plug in any K-type thermocouple into T1 and/or T2.

3 Read the temperature directly from the display.

4 T1-T2 is displayed in the lower left corner of the display.

Target Superheat

Target Superheat is only used for charging fixed orifice air

conditioning systems. Your SMAN allows you to input indoor
wet bulb (IDWB) and outdoor dry bulb (ODDB) temperatures
manually, in real-time using K-type thermocouples, or a
combination of both to calculate the Target Superheat. Your SMAN
will detect if a thermocouple is plugged in or not. Unplugging the
thermocouple lead(s), at any time, sends the SMAN into manual
input mode and plugging them in, at any time, automatically
sends the SMAN to input directly from the thermocouples.

Input temperatures with K-type thermocouples

1 Press circular button until Target SH is shown in the bottom,

center of display.

2 Plug ATWB1 Wet bulb K-type thermocouple into T1 and ATA1 Dry

bulb K-type thermocouple into T2.

3 Press ENTER. The IDWB will display the real-time temperature

measured from T1. Use the ARROW button to select the

temperature you want to input first, either IDWB or ODDB.

4 For IDWB input, wet the sock of the ATWB1. Clip it to the return

of the evaporator between the filter and coil. When the wet bulb

temperature reaches its lowest point and stabilizes, press ENTER

to lock the reading. If the inputted temperature is below the wet

bulb range, “-OL” will blink. If the inputted temperature is above

the wet bulb range, “OL” will blink. Retake the measurement if

“OL” or “-OL” is displayed.

5 For ODDB input, clip the ATA1 thermocouple to the side of the

condenser. Once reading is stable, press ENTER. If the inputted

temperature is below the dry bulb range, “-OL” will blink. If the

inputted temperature is above the dry bulb range, “OL” will blink.

Re-take the measurement if “OL” or “-OL” is displayed. For accurate

results, keep the ATA1 shaded from direct sunlight.

6 Once both IDWB and ODDB are locked in, the Target Superheat

will show in the lower left corner of the display. If the Target

Superheat calculated from the IDWB and ODDB temperatures is

outside the range in which air conditioning is recommended then

“OL” is displayed. Usually, raising the indoor temperature will

bring the conditions within manufacturer’s recommendations.

If your target superheat is out of the recommended range, press

ENTER to re-take both your measurements.

7 To re-take either IDWB or ODDB, press the ARROW button until

the label (IDWB or ODDB) you wish to re-take is blinking. Press

ENTER. Re-do the measurement and press ENTER to lock it in. The

newly calculated target superheat will be displayed.

8 To clear both IDWB and ODDB simultaneously, press ENTER.

Input temperatures manually

1 Press circular button until Target SH is shown at the bottom,

center of display. Unplug thermocouples from T1 and/or T2.

2 Press ARROW button to select a blinking IDWB or ODDB. Press

ENTER to make a selection. Use the ARROW button to change

blinking digit and press ENTER to lock in each digit. Once the

last digit for ODDB or IDWB is locked in, the calculated target

superheat will show in the lower left corner of the display.

Note: When pressing ENTER to lock in the last digit for IDWB or

ODDB, if the inputted temperature is below the wet bulb or dry

bulb range, “-OL” will flash once. If the inputted temperature is

above the wet bulb or dry bulb range, “OL” will flash once. In both

instances you must re-input the measurement.

3 See steps 6-8 above.

Pulling a Vacuum (model SMAN3)

Follow all manufacturers’ evacuation procedures over those in

this manual.

Note: larger systems may take much longer to reach a deep vacuum

and a different evacuation method or equipment might be preferred.

1 Connect your SMAN3 in between your vacuum pump and the

system, then power on your SMAN3.

2 Draw a vacuum on the system. The SMAN will automatically

sense the negative pressure and display the vacuum in microns.

3 Press Alarm button to toggle between the High (Hi) alarm, the

Low (Lo) alarm and no alarm. No Display of Lo or Hi means alarm

is off. Note: The stopwatch will start when an alarm is selected.

Pressing Alarm will reset the stopwatch.

4 When the rate of change in pressure is less than 1 micron per 10

seconds, Stable will appear in the lower left corner of the display.

Additional Tips:

To achieve a deep vacuum as quickly as possible:

1 Use the shortest hoses with the largest diameter available.

2 Remove Schrader cores and core depressors. Core removal tools

like the "MegaFlow Valve Core Removal Tool" can be purchased to

help with this process.

3 Inspect the rubber seals at both ends of your hoses for damage

that may result in leakage.

4 Do not use hoses with low loss fittings when evacuating or

pulling a vacuum on a system.

Set Vacuum Alarms (SMAN3)

1 Hold the ALARM button for one second to enter Alarm Set mode.

2 Press the ALARM button to toggle between Alarm Hi and Lo.

3 Use ARROW button to select the value and press ENTER to lock in

each digit. Once last digit in Alarm Lo is locked, your SMAN will

automatically revert to normal testing mode.

T1

T2

Atmospheric

Pressure

Superheat

Subcooling

T1 T2 Direct

Saturation

Target

Superheat

CAL

CAL

CAL

CAL

Test

Pressure

AUTO

OFF

Refrigerant

ON/OFF

Enter

Units

Alarm

Digital Manifold + Vacuum Gauge

SMAN3

1

1

2

2

3

14

4

5

8

9

11

10

12

6

7

LOW

HIGH

LOW

HIGH

13

Pressure (bar)

Pressure (pounds/in

2

)

Pressure (kilopascals or Megapascals)

Negative Pressure (inches of mercury)

Negative Pressure (cm of mercury)

Superheat

T1 Direct

Vapor Saturation Temperature

Indoor Wet Bulb

Micron Reading Has Stabilized

Set Mode

Alarm Mode

High Alarm

Low Alarm

Vacuum (Microns of Mercury)

T1 thermocouple - T2 thermocouple

Target Superheat

Pressure (bar)

Pressure (pounds/in

2

)

Pressure (kilopascals or Megapascals)

Negative Pressure (inches of mercury)

Negative Pressure (cm of mercury)

Subcooling

T2 Direct

Liquid Saturation Temperature

Outdoor Dry Bulb

Vacuum Stopwatch

Hours:Minutes or Minutes:Seconds

Battery Life

Auto Power Off Enabled

Selected Refrigerant of System