GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

ALL PURPOSE DUCT/IMMERSION LOW LIMIT THERMOSTAT

TLAP SERIES

PRODUCT DESCRIPTION

The single point duct/immersion low limit thermostat

incorporates a precision thermistor sensor and

provides a Form C relay output (NO/NC) with an

adjustable setpoint. The sensor is encapsulated in

a 6mm (0.236”) OD, 304 stainless steel probe and is

available in various lengths (see ordering chart). All

probes provide excellent heat transfer, fast response

and 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.

The duct type probes are installed through a hole

in the side of the duct to monitor a single point

temperature within the duct. Since the probes are tip

sensitive, select a probe length that places the sensor

well into the duct. Install the probe in a straight

section of duct at a suitable distance downstream

from any heating, cooling or humidification devices.

The enclosure provides mounting tabs for ease of

installation.

NOTE: For immersion applications, T2 series

thermowell is required. When using a T1 series

thermowell an adapter will be required.

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 100°C (-40 to 212°F)

PROBE MATERIAL

304 series stainless steel

PROBE DIAMETER

6 mm (0.236”)

STANDARD LENGTHS

50, 100, 150, 200, 300, and 450 mm

(2”, 4”, 6”, 8”, 12”, and 18”)

WIRE MATERIAL

PVC insulated, parallel bonded, 22 AWG

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 fall

SETPOINT OPERATION

Single-turn knob-pot on PCB

ADJUSTABLE SETPOINT

-4 to 10°C (25 to 50°F)

SETPOINT TEMPERATURE

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

Jumper selectable

TEMPERATURE SENSOR

Precision thermistor

AMBIENT OPERATING RANGE

-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

Various Probe Lengths

See Specifications

116.5 mm

4.58"

0.5" NPT

Foam Gasket

304 Series S/S

53.7 mm

2.11"

6.00 mm

0.236"

112.5 mm

4.43"

99.7 mm

3.93"

DUCT MOUNTING

THERMOWELL MOUNTING

T1-AP THERMOWELL ADAPTER

THERMOWELL PLACEMENT

MOUNTING STYLES