ICS TWO-STAGE FROST PROTECTION THERMOSTAT (FTSE) Datasheet

FTSE20 / FTSE 60

2-STAGE ELECTRONIC FROST PROTECTION THERMOSTAT

GENERAL

Frost protection thermostats are installed on the air side for the purpose of protecting air conditioning units, heat exchangers, radiators, and similar installations against damages due to frost or freezing. With the FTSE Electronic Frost

Protection Thermostat, Honeywell FEMA has expanded its line of electromechanical products with an electronic device.

A special warming-up function, the integrated housing head heater, and especially simple operation are the hallmarks of the FTSE.

Models

Model

FTSE20

FTSE60

Capillary tube length Protection type

42

42

FEATURES

 Special warming-up function

 Integrated housing head heater for operation at temperature of down to -15 °C

 Especially simple operation

 Adjustable to function as either monitor or limiter

 Built-in relay contact allows direct switching of loads of up to 250 VAC, 6(2) A

 Possible to issue a control voltage to the 0…10V output via the 0…10V input

 Current temperature measurement can be sent via the separate 0…10 V output to, e.g., an external temperature display

 CE-approved

 (Eurasian Conformity)

PRODUCT DATA

SPECIFICATION

Measuring range:

Setting range:

Voltage supply:

Valve control input:

0 … 15 °C

1 … 10 °C

24 VAC +10 / -20% SELV,

48 … 63 Hz

(Y1) 0 … 10 V, input current max.

0.1 mA

Valve control output:

Transmitter output:

Electrical safety:

Protection rating:

(Y2) 0 … 10 V, load max. 1 mA

(T) 0 … 15 °C = 0 … 10 V, load max.

1 mA

According to DIN EN 60730-2-9.

Overvoltage category III. Pollution degree 2. Rated surge voltage 4.0

kV. Brinell test temperature 125 °C.

Software class A.

I, with internal isolation from SELV circuit

Power consumption: Max. 6.6 VA

Electrical connection: Tension spring terminals

Conductor cross-sec.: Max. 2 x 1.5 mm 2 or 1 x 2.5 mm 2 , min. 1 x 0.25 mm 2

EMC: DIN EN 61326-1

Interference emission: Class B

Interference immunity: Industrial requirements

Perm. Ambient temp.: -15 … +55 °C (use)

-25 … +65 °C (storage)

Fuse protection:

Max. switching cap.:

Max. 10 A

Relay output: 230 VAC, 6(2) A;

24 VDC, 6A

Protection type:

Mode of operation:

Weight:

IP42 according to EN 60529

According to 60730-1, type 1 B

2-meter probe line, approx. 0.34 kg;

6-meter probe line, approx. 0.41 kg

FUNCTION

If any portion of the capillary tube is cooled to below the set temperature switch-point, the thermostat automatically switches itself off. Alternately, the thermostat can be adjusted to function as either a monitor or as a limiter (the latter with a manual reset button - see "4" in Fig. 3). The built-in relay contact allows the direct switching of loads of up to 250 VAC,

6(2) A.

Over the measuring range of +10…0 °C, the sensor delivers an output signal of 0…10V at the output. A heating valve actuator or air damper actuator can be connected to this output; the actuator will then open continuously according to the output signal.

It is also possible to issue a control voltage to the 0…10V output via the 0…10V input.

FTSE20 / FTSE60 – PRODUCT DATA

As soon as the temperature drops below the temperature threshold set by the customer, the FTSE assumes priority and closes the connected valves or air dampers continuously until the final shut-off point is reached – regardless of the given input voltage.

Furthermore, the current temperature measurement can be sent via the output to, e.g., an external temperature display.

The FTSE is equipped with a housing head heater as a standard feature. Down to a temperature of -15 °C, this heater keeps the sensor head at a temperature of +15 °C and thus guarantees perfect operation even at low temperatures.

In order to prevent repeated and frequent switching on and off during the warm-up phase, the FTSE features a warm-up function which ensures that the heating valve (or air damper) is first completely opened via the 0…10V output before the relay contact has the chance to shut off the entire installation.

All settings on the thermostat can be carried out using two pushbuttons (see "3" and "4" in Fig. 3) accessible after unscrewing a small cover screw (see "A" in Fig. 3). It is not necessary to remove the power supply before carrying out adjustments. The FTSE allows both the switch-point and the operating mode to be selected. The switch-point can be set to between 1 and 10 °C. One has the choice of an operating mode with or without restart lock-out. When selecting the operating mode with restart lock-out, after the set switch-point is reached, the thermostat is locked until manually reset by pushbutton (see "4" in Fig. 3) (however, this is possible only after the temperature has dropped by the switching differential of approx. 2 K). One can also reset the device by removing it from the power supply.

Y2

~6 K

10 V

NO

COM

NC

ACCESSORIES

Incl. in Delivery

Brackets for capillary 6 pcs. for FTSE60

3 pcs. for FTSE20

Cable glands

Screws for direct mounting

2 pcs., M 16x1,5

2 pcs.

Protective sleeve for capillary 1 pc.

DIMENSIONS

14...15

3.5

20.5

18.5

77.6

96 a

48.5

66.5

DRILLING DIAGRAM FOR

DIRECT MOUNTING

Fig. 2. Dimensions of FTSE (in mm)

MOUNTING

See FTSE20 / FTSE60 - Mounting Instructions ( MU1B-

0589GE51).

WIRING

2

AUTO MANU

4

RESET

TEST

1 3

P

(A)

NO

COM

NC

0 V

P (1 ... 10 °C)

~2 K

Fig. 1. Function chart

T [C°]

MAX. 10 A

NO

COM

NC

MAX

GND

T

24V

Y1

Y2

24 VDC / 230 VAC

0.1 ... 6(2) A

24 VAC SELV

Fig. 3. Connection example

W

X

M