Danfoss ATF Clamp-On Pipe Mounting Frost Thermostat Installation Guide

1

Installation Guide  

ATF  

Frost thermostat  

Application  

The ATF is a clamp-on pipe mounting frost thermostat. The thermostat is supplied compete with a spring fixing stap for use  

with pipework from ½ to 2 “.  

Fixing the thermostat  

1,  

2,  

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

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 core of the flexible  

lead on the appropriate therminals on the thermostat, noting that,  

Terminal 1-2 : Break on rise of temperature  

Terminal 1-4 : Break on fall of temperature  

It is important that the product be earthed.  

Setting the thermostat  

Set at minimum 200C  

Technical specifications  

Temperature range: 20-900C  

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 the temperature fall  

at the dial set value, in order to provide frost protection.  

Wiring Detail:  

The unit must be installed by a competent electrician and  

the installation should conform for the current IEE Wiring  

Regulations. An Earth conection is required.  

4

1

2

1 - 2 : BREAK ON RISE  

1 - 4 : BREAK ON FALL  

© Danfoss Climate Solutions | 2023.06  

AN000086405136en-010102 | 1  

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General	Details
Name	Danfoss ATF Clamp-On Pipe Mounting Frost Thermostat Installation Guide
Make	Danfoss
Language	English
Filetype	PDF (Download)
File size	0.17 MB

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• Danfoss

Danfoss ATF Clamp-On Pipe Mounting Frost Thermostat Installation Guide Overview

Summary of Contents

• Page 1: Installation guide for the frost thermostat outlines the necessary steps and specifications for proper installation and use. The ATF is a clamp-on pipe mounting frost thermostat designed for pipework from ½ to 2 inches. Ensure the pipe surface is clean and free from paint and rust before clamping the thermostat. Secure the thermostat using a spring fixing strap, ensuring it holds tightly to the pipe. Remove the thermostat cover to connect the flexible cord to the appropriate terminals. Terminal 1-2 breaks on rise of temperature, while terminal 1-4 breaks on fall of temperature. The thermostat should be set at a minimum of 20°C for effective operation. Technical specifications include a temperature range of 20-90°C and a voltage rating of 220/240 Volts AC 50Hz. The unit must be installed by a competent electrician, conforming to current IEE Wiring Regulations. An earth connection is required for safe operation.