Danfoss ATF Installation guide

ATF

Frost Thermostat

INSTALLATION INSTRUCTIONS

TECHNICAL SPECIFICATION

Temperature Range : 20 - 90°C
Switching Differential : 8K
Voltage Rating : 220/240 Volts AC 50Hz
Current Rating : 15 (2.5) Amp.
Switching Action : SPDT

Note: This unit has been calibrated to switch on temperature fall at the dial set value, in order to provide frost protection
The unit must be installed by a competent electrician and the installation should conform to the current IEE Wiring Regulations. An

Earth connection is required.

A) APPLICATION

The ATF is a clamp-on pipe mounting frost thermostat.
The thermostat is supplied complete with a spring fixing

strap for use with pipework from ½" to 2".

B) FIXING THE THERMOSTAT

1. Ensure that the pipe surface to which the thermostat is to
be clamped is clean and free from paint and rust.

2. Place the thermostat on the pipe, securing one end of the
spring fixing strap to one of the fixing lugs on the thermostat.
Stretch the spring strap around the pipe and clip over the
un-used fixing lug on the thermostat.

It is important that the spring strap holds the thermostat
tightly to the pipe.

Cut off any surplus spring strap using a pair of side cutting
pliers.

3. Remove the thermostat cover, take the flexible cord
through the gland plate and terminate the cores of the
flexible lead on the appropriate terminals on the thermostat,
noting that,

Terminals 1 - 2 : Break on rise of temperature,
Terminals 1 - 4 : Break on fall of temperature.
It is important that the product be earthed.

WIRING DETAIL

This product complies with the following EC Directives

Electro-Magnetic Compatibility Directive.
(EMC) (89\336\EEC), (92\31\EEC)
Low Voltage Directive.
(LVD) (73\23\EEC), (93\68\EEC)

4 1 2

:

C) SETTING THE THERMOSTAT

Set at minimum 20°C

1 - 2 : BREAK ON RISE
1 - 4 : BREAK ON FALL

Danfoss Randall can accept no responsibility for possible errors in catalogues, brochures and other printed material, and reserves the right to alter its products without notice.
This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.

Danfoss Randall Limited

Ampthill Road
Bedford
MK42 9ER
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.danfoss-randall.co.uk

Part No: 2071 Iss 9 05/05