GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

OUTSIDE LOW LIMIT THERMOSTAT

TLOS SERIES

PRODUCT DESCRIPTION

The single point outside air low limit thermostat

incorporates a precision thermistor temperature

sensor and provides a Form C relay output (NO/NC)

with an adjustable setpoint. All probes are

constructed to provide excellent heat transfer,

fast response and are potted to resist moisture

penetration. A hinged and gasketed weatherproof

Polycarbonate enclosure is included for ease of

installation.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The outside temperature transmitter should be

mounted on an outside North facing wall, under

the eaves which will provide protection from

direct sunlight.

The outside temperature sensor can be mounted

directly to building’s wall face using the provided

mounting holes. There is one 0.85” hole for

conduit connection.

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

-10 to 50°C (14 to 122°F)

PROBE MATERIAL

Machined aluminum

WIRE MATERIAL

PVC insulated, parallel bonded

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)

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

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

CABLE GLAND FITTING

THREAD ADAPTER 1/2” NPT TO M16

ACCESSORIES - INCLUDED WITH F ENCLOSURE OPTION

North

OSA Temperature

Sensor

99.7 mm

3.96"

116.8 mm

4.6"

112.5 mm

4.43"

53.98 mm

2.125"

1/2” NPT