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Quick Start
1 Install six AA batteries into rear battery com-
partment. Batteries included in packaging.
2 Press the center blue button for 1 second to
turn on your new manifold.
3 Connect hoses and pipe clamps to the mani-
fold and the system.
4 See real-time pressure and temperature mea-
surements all at once!
Certifications
C-Tick (N22675)
CE
RoHS Compliant
Description
Your SMAN340 is a superb two-valve Digital
Manifold for HVACR professionals. See all your
pressures and temperatures at the same time
on the redesigned large display with bright
blue backlight.
SMAN340 combines high precision, absolute
pressure sensors, a superheat/subcooling
calculator, and dual temperature measurements.
Your SMAN340 calculates and displays target
superheat and actual superheat to verify proper
charge.
SMAN340 is designed to meet the demands
of HVACR field service with a rugged rubber
boot for durability, a strong metal hanger for
easy storage and a form fitting, water resistant,
padded nylon pouch. SMAN340 has a very
intuitive user interface and long battery life.
Your SMAN comes pre-programmed with
accurate P-T charts for 45 of the most common
refrigerants in the field so you are always
prepared for any job.
Fieldpiece
Digital Manifold
OPERATOR'S MANUAL
Model SMAN340
Controls
1 Insert Type K thermocouple plugs here.
2 Temperature calibration pots.
3 Press to zero atmospheric pressure.
4 Press to calibrate to refrigerant tank.
(See Advanced Pressure Calibration section.)
5 Press to confirm selection.
6 Press/hold to cycle through refrigerants.
7 Press to enter Target Superheat mode.
8 Press to scroll up/down to adjust values.
9 Press to adjust units.
10 Hold 1 second to power on or off. Press to toggle backlight.
11 Turn clockwise to close High side port.
12 Turn clockwise to close Low side port.
Functions
Superheat and Subcooling
Your SMAN340 can calculate and display both superheat and
subcooling simultaneously.
1 Select the appropriate refrigerant using the REFRIGERANT button.
2 Connect EPA approved refrigerant hoses to low and high side on
SMAN340. Plug Type K thermocouple pipe clamps to SLT and LLT.
3 Connect your SMAN340 to the system:
Superheat:
Hand tighten low side hose to suction line service
port. Place the SLT pipe clamp 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 LLT pipe clamp thermocouple on the liquid line
between the condenser and expansion valve (TXV), as close to the
service port as possible.
4 After turning the system on or making any adjustments to
the system wait 15 minutes before charging by superheat or
subcooling to ensure the system is stabilized.
5 To add or remove refrigerant connect a refrigerant or recovery
tank to the center port on SMAN340. Follow charging or recovery
practices from manufacturer. Use the low side and high side
valves on SMAN340 to charge or recover refrigerant as needed. Let
system stabilize again for 15 minutes.
Note: When superheat and/or subcooling cannot be calculated an
"OL" or "-OL" will be displayed. Please check the following:
1 The correct refrigerant is selected on the SMAN.
2 The pipe thermocouples are plugged into SLT/LLT ports and are in
good working condition.
3 The pipe thermocouples are attached in the appropriate location on
the system. See step 3 above for details.
Target Superheat
Target Superheat is useful for charging fixed orifice air conditioning
Target Superheat is useful for charging fixed orifice air conditioning
systems. Your SMAN will calculate the target superheat for you. Just
manually input the IDWB (indoor wet bulb) and ODDB (outdoor dry
bulb) temperatures into the SMAN.
Input IDWB and ODDB manually
1 Press Target SH button to enter Target SH mode. IDWB will begin
blinking indicating it is ready for an input.
2 Press UP or DOWN ARROW to toggle between IDWB or ODDB
input. Hold ENTER to select which temperature you want to input
first, either IDWB or ODDB. The far left digit of IDWB or ODDB will
begin blinking indicating manual input mode is ready.
3 Press the UP or DOWN ARROW to change values 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 center column
of the display. A solid HOLD will display to the left of the TSH
calculation indicating a static target superheat calculation.
Note: If the inputted temperature is out of the calculable range for IDWB
or ODDB an "Err" will flash once and a double beep will sound. IDWB
range (40°F to 125°F, 4.4°C to 51.7°C) and ODDB range (50°F to
140°F, 10°C to 60°C). Re-input a temperature within these ranges to
calculate target superheat.
Changing Units
Your SMAN can display pressure and temperature measurements in
English, Metric or combination of both units.
1 Press UNITS to enter unit selection screen.
2 Use ARROW to select your desired pressure units. Press ENTER.
3 Use ARROW to select your desired temperature units. Press ENTER
to return to pressure units.
4 Press UNITS to return to normal SMAN display.
Refrigerants
The P-T charts of the following 45 refrigerants come pre-
programmed into your SMAN. In your SMAN the refrigerants are listed
in order of most commonly used. Here, they are listed in numerical
order for easy reference.
R11, R113, R114, R12, R123, R1234YF, R124, R125, R13, R134A, R22,
R23, R32, R401A(MP39), R401B, R402A, R402B, R404A, R406A, R407A,
R407C, R407F, R408A, R409A, R410A, R414B (Hotshot), R416A, R417A,
R417C (HOT SHOT 2), R420A, R421A, R421B, R422A, R422B(NU22B),
R422C(Oneshot), R422D, R424A, R427A, R434A(RS-45), R438A(MO99),
R500, R502, R503, R507A, R508B (Suva95)
Using Different Refrigerants
You can use your manifold with different refrigerants. Be sure to
purge your manifold and hoses before connecting to a system with a
different refrigerant.
Firmware Updates
Your SMAN340 firmware can be updated in the field to ensure you
always have the most up-to-date features for your manifold. Just go
to www.fieldpiece.com to periodically check for the latest firmware
version. If a newer version is available, follow the download link and
installation instructions on the website. Connect your SMAN340 to the
PC via a mini-USB to USB cable (not included) to install the update on
your SMAN.
To check your current firmware version, power off your SMAN340.
Press and hold the blue power button for about 6 seconds. The SMAN340
firmware version will show in the top right corner of the display (X.XX).
Maintenance
Clean the exterior with a dry cloth. Do not
use liquid.
Battery Replacement
The battery must be replaced when the
battery life indicator
is empty. SMAN will
display "lo batt" and power off. Remove rear
battery cover and replace with 6 AA batteries.
Auto Power Off (APO)
To conserve battery life, your SMAN will
power down after 30 minutes of inactivity. APO
is activated by default and APO displays above
the battery icon. To deactivate, press and hold
ENTER while powering on the SMAN. When
deactivated, APO will no longer show above
the battery icon.
LOW
HIGH
Pressure (bar)
Pressure (pounds/in
2
)
Pressure (kilopascals or Megapascals)
Negative Pressure (inches of mercury)
Negative Pressure (cm of mercury)
Suction Line Temperature
Liquid Line Temperature
Vapor Saturation Temperature
Liquid Saturation Temperature
Superheat
Subcooling
Target Superheat
Static Target Superheat Calculation
Outdoor Dry Bulb
Indoor Wet Bulb
Battery Life
Auto Power Off Enabled
Selected Refrigerant of System
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LOW
HIGH
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
