GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

FLYING LEAD HIGH LIMIT THERMOSTAT

THFL SERIES

CABLE GLAND FITTING

THREAD ADAPTER 1/2” NPT TO M16

ACCESSORIES - INCLUDED WITH F STYLE ENCLOSURE

PRODUCT DESCRIPTION

The single point flying lead temperature thermostat

incorporates a precision thermistor temperature

sensor and provides a Form C relay output (NO/

NC) with an adjustable setpoint. The sensor is

encapsulated in a 6 mm (0.236”) OD X 50 mm (2”),

304 series stainless steal probe. Standard wire

length is 3.05m (10’). All probes are constructed to

provide excellent heat transfer, fast response and

are potted to resist moisture penetration. A hinged

and gasketed Polycarbonate enclosure is provided

for ease of installation.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

A typical application for the flying lead type probes

is to monitor a single point temperature within

the duct. Install the probe in a straight section of

duct at a suitable distance downstream from any

heating, cooling or humidification devices. Drill

a 3/8” hole in the top of the duct and hang the

sensor in the airstream.

The enclosure provides mounting tabs for ease of

installation.

POWER SUPPLY

12 to 28 Vac/dc

SENSOR ACCURACY

±0.2°C, 0 to 70°C (±0.36°F, 32 to 158°F)

PROBE SENSING RANGE

-40 to 60°C (-40 to 140°F)

PROBE MATERIAL

304 series stainless steel

PROBE DIAMETER

6mm (0.236”)

WIRE MATERIAL

FT-6 Plenum rated cable

WIRE LENGTH

3.05 m (10’)

CONSUMPTION

50 mA max

RELAY CONTACTS

SPDT, Form C contacts (N.O. and N.C.)

5 Amps @ 30 Vdc/250 Vac resistive

1.5 Amps @ 30 Vdc/250 vac inductive

RELAY ACTION

Activates on temperature rise

SETPOINT OPERATION

Single-turn knob-pot on PCB

ADJUSTABLE SETPOINT

38 to 60°C (100 to 140°F)

TEMPERATURE DIFFERENTIAL

Low: 1.1°C (2°F) Mid: 2.8°C (5°F) High: 5.6°C (10°F)

Jumper selectable

TEMPERATURE SENSOR

10,000Ω curve matched precision thermistor

OPERATING CONDITIONS

-10 to 50°C (14 to 122°F), 5 to 95 %RH, non-condensing

STORAGE CONDITIONS

-30 to 70°C (-22 to 158°F), 5 to 95 %RH, non-condensing

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

ENCLOSURE

B: Grey polycarbonate UL94-V0, IP65 (NEMA 4X)

F: Same as B with thread adapter (1/2” NPT to M16) and cable gland fitting

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

112.5 mm

4.43"

99.7 mm

3.93"

1.83 m

6.00’

6.00 mm

0.236"

50 mm

2”

FT-6 Rated Plenum Cable, 22 AWG

304 Series S/S Probe

116.5 mm

4.58"

53.7 mm

2.11"