Infloor DIGIT-STAT 30120 User Manual

INSTALLATION AND OPERATING INSTRUCTIONS

DIGIT-STAT 30120 UNIVERSAL DIGITAL TEMPERATURE GAUGE

FOR HYDRONIC HEATING/SOLAR HEAING/GEOTHERMAL SYSTEM

DIGITAL TEMPERATURE GAUGES 30120

Infloor Sales & ServiceDigital Temperature gauge replaces two
mechanical temperature gauges as it can simultaneously displays
the accurate temperature of two locations such as the supply and
return piping on a hydronic heating system. When 24VAC is
supplied, the lithium battery enable the unit to work in case of power
failure. 30120 is also ideal for any application that requires quick
and accurate response to temperature change, an easy to read
display and a wide temperature range.

FEATURES:

Dual Large LCD (Liquid Crystal Display) to show supply
and return temperature.
Min/Max memory can be selected for both OUT(Supply)
and IN (Return) water temperature since the last time
RESET button was pressed
Celsius or Fahrenheit switch on the front unit.
Dual power input: 24VAC or Lithium Battery. When both
inputs are applied, 24VAC has priority over lithium battery.
Frequent sample rate dictate any change in temperature
instantly
Easy installation

SPECIFICATIONS:

Temperature range: -58 to 302 F (-50 to 150 C)
Resolution: 0.1 F(0.1 C)
Accuracy: ±1 C / ±2 F
Sample rate: 3 Secs.
Input: 2 x 10K ohm thermistor probe model: P-03
(designed to strap on a pipe or insert into a temperature
well)
Operating Voltage: 24VAC or Lithium Battery (included,
last for over 3 years)
Size: 3.5” x 2.0” x 0.9” (88.9mm x 50.8mm x 22.86mm)
Enclosure: Flame-retardant plastic
Operating Temperature: 32 to 122 F(0 to 50 C)
Weight: 0.11lbs (50g)

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UNIVERSAL SENSOR PROBE
(THERMISTOR) Model: 30121

MODEL DESCRIPTION

30120

30121

INSTALLATION:

INSTALLATION:

Digital temperature gauge with two
universal sensor probes

Universal sensor probe (high range)

REMOVING THE FRONT COVER

Push down the plastic tab located on top of the enclosure with
finger or small screwdriver to release the lock. Swing the front
cover away from the base using the bottom edge as the pivot.

Push the tab to open
the cover

MOUNTING THE 30120 ON THE WALL

THE 30120 can be mounted on the wall (or wooden board)
using two #6 screws. Insert the screws through the mounting
holes on the base and fasten the screws to the wall.

The Infloor Sensor Probe is engineered to ensure long life
and rapid response. It is designed to strap on a pipe or
insert into a temperature well. 30121 is specially designed
for use with 30120 and other controls that require 10K ohm
thermistors.

SPECIFICATIONS:

Sheath: Copper
Lead: 10” of 20 AWG heat resistence green wire
Dimension: 3/8" OD x 13/16" length (9.5mm OD x

20.6mm)
Weight: 0.02lb (10g)
Operating range: -58 to 302 F (-50 to 150 C)
Sensor: 10K ohm @ 77 F (25 C ± 1%) thermistor

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Insert #6 screws into these
mounting holes

WIRING THE 30120

First of all, decide if the wire is going to run through the
bottom or back opening. In case of running the wire
through the bottom opening, remove the plastic plug by
sliding outward. For hydronic heating system, run a pair of
wire (18-20AWG) from each of P-03 sensor to the
corresponding terminal blocks:
Sensor of Supply Piping to “T1 T1” or “OUT”.
Sensor of Return Piping to “T2 T2” or “IN”.
For other systems, T1 corresponds to location 1 and T2
corresponds to location 2 of the sensors.

When 24VAC input is applied, the power consumption
from the lithium battery will be disabled. Always pull away
the plastic tab from the battery to activate the battery
power or as backup power.

Note: Do not run sensor wires parallel to other electrical wiring

or telephone wires. In case there is strong source of
electromagnetic interference, twisted pair 20AWG wire is
recommended.

OPERATION OF THE BUTTONS ON THE
FR ONT CO VER:

MAX-MIN

From the normal temperature display mode(no wording
such as MAX or MIN on the LCD), press MAX-MIN button
once to display the recorded maximum temperature of
OUT(supply) and IN(return) piping. MAX appears in the
temperature LCD’s.

Press MAX-MIN button again to toggle to the recorded
minimum temperature of OUT(supply) and IN(return)
piping. MIN appears in the temperature LCD’s.

Press MAX-MIN button again to return to the normal
temperature display mode.

RESET

Press RESET button to reset both the maximum and
minimum temperatures in the memory.

Printed Circuit Board
behind the cover

24VAC

T2 T2

24VAC

RETURN
PIPING

IN

OUT

T1 T1

Plastic plug removed

30121 Sensor Probes

SUPPLY
PIPING

Switch for setting
default display unit
in ° °C or F after reset
or power up.

INST ALLING THE FRONT COVER

This is the reverse process of removing the front cover.
The hinges on the bottom of the front cover can be aligned
with the base to provide pivot for the front cover to close.
Swing the top part of the front cover all the way until it
snaps tightly with the base.

C/ F

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Press the C/ F button to toggle between C and F.

INSTALLATION:

O THER OPERATION ISSUES:

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OUT OF RANGE

If the temperature is under -58 F (-50 C), “LLL” will be

displayed

If the temperature is over 302 F (150 C), “HHH” will be

displayed

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LOW BA TTER Y INDICATOR

If the battery is low, symbol will be flashing.

Change the battery as soon as possible.

MOUNTING THE SENSOR:

The sensor 30121 is designed to strap on a pipe or

insert onto a temperature immersion well.

Sensors should be strapped to the pipe with cable tie.
The flat side of the sensor should be resting on the pipe. In
addition, they should be covered with a layer of insulation
to minimize the effects of ambient temperature for a more
reliable temperature reading.

The sensor 30121 can also be insert onto a 3/8”(10mm)
or ½”(12.7mm) ID temperature well.

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