Danfoss ATP Installation guide

ATP

Pipe Thermostat

INSTALLATION INSTRUCTIONS

TECHNICAL SPECIFICATION

Temperature Range	:	0	- 90°C
Switching Differential	:	4	- 8K
Voltage Rating	:	220/240 Volts AC 50Hz
Current Rating	:	15 (2.5) Amp.
Switching Action	:	SPDT

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 ATP Pipe Thermostat is suitable for all applications requiring a surface mounted (clamp-on) thermostat for controlling temperature in the range of 0-90°C.

The thermostat is supplied complete with a spring fixing strap for use with pipework from ½" to 2".

The wide temperature range of the ATP allows the thermostat to be used across a wide range of applications including frost protection.

The thermostat setting can be locked between 5-25°C and 65-85°C.

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. Apply a small quantity of the contact paste supplied with the thermostat to the pipe wall.

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 the cores of the flexible lead on the appropriate terminals on the thermostat, noting that,

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

4.If the setting of the thermostat is to be left unlocked, the cover can now be re-fitted and the thermostat set to the desired value.

5.If the setting is to be locked proceed to C) on the following page.

WIRING DETAIL

2

C

1

C - 1 : BREAK ON RISE

C - 2 : BREAK ON FALL

1

C) LOCKING THE THERMOSTAT SETTING

THERMOSTAT WITH COVER REMOVED

The thermostat setting can be locked at any of the following settings.

5, 10, 15, 20 and 25°C	-	Lower range
65, 70, 75, 80 and 85°C	-	Upper range

D)LOCKING THE THERMOSTAT SETTING BETWEEN 65°C AND 85°C

1)Turn the thermostat knob to the temperature level at which it is to be locked and remove the knob.

2)The thermostat is fitted with a knob locking screw which on delivery may be parked in either the left or right hand locking screw posts. The screw must be positioned in the left hand locking screw post.

3)Turn the locking screw clockwise until the screw bottoms on the thermostat case. Then turn the locking screw counter-clockwise for three full turns ensuring that the slot of the screw is vertical.

4)Replace the knob onto the thermostat shaft ensuring that the locking screw aligns with the appropriate cut-out in the knob base.

It is important for the locking screw and the cutout to align correctly. The slot in the locking screw must be vertical.

5)Finally, replace the thermostat cover.

E)LOCKING THE THERMOSTAT BETWEEN 5°C AND 25°C

1)Turn the thermostat knob to the temperature level at which it is to be locked and remove the knob.

2)The thermostat is fitted with a knob locking screw, which on delivery may be parked in either the left or right hand locking screw post. For this operation it must be located in the right hand post.

3)Turn the locking screw clockwise until the screw bottoms on the thermostat case. Then turn the locking screw counter-clockwise for three full turns ensuring that the slot of the screw is vertical.

4)Replace the knob onto the thermostat shaft ensuring that the locking screw aligns with the appropriate cut-out in the knob base.

It is important for the locking screw and the cutout to align correctly. The slot in the locking screw must be vertical.

5)Finally, replace the thermostat cover.

LOCKING

SCREW POST

KNOB

LOCKING

SCREW

LOCKING THE RANGE BETWEEN 65°C AND 85°C

LOCKING

SCREW POST

KNOB

LOCKING

SCREW

LOCKING THE RANGE BETWEEN 5°C AND 25°C

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 Ltd.,

Ampthill Road,

Bedford, MK42 9ER

Tel: [phone] Fax: [phone]

Email: [e-mail]

Website: www.danfoss-randall.co.uk

2	Part No. 2064 Issue.2 05/05