Danfoss 852 Installation guide

Seven Day Two Channel Electronic Timeswitch

Model 852

Installation and Wiring Instructions

N L 6

Themodel852timeswitchmustbeinstalledbyacompetent electricianandtheinstallationshouldconformtoIEEWiring Regulations.

Installation and Wiring

1Slacken the four fixing screws, one in each corner of the unit, and carefully separate the front and rear portions.Unplugtheribboncablefromtherearportion. CAUTION: Do not allow either half of the unit to hang by the ribbon cable as damage could be caused.

2Remove the polystyrene packing piece from the top of the transformer. It is marked “REMOVE”.

3Selectthedesiredfixingpositionandobservethelabel “THIS WAY UP”inside the rear portion. The two halves will only assemble correctly one way round.

4Four fixing holes are provided for attaching the rear portion to the wall or mounting surface.Conduit box adaptors as shown below are availabe if required.

PART NO: 8/3222 Square Conduit Box Adaptor

CABLE

ENTRY

APERTURE

4 fixings for existing	4 fixings for
square conduit box	MK8 timeswitch

PART NO: 8/3223 Double Gang Surface Box Adaptor

CABLE

ENTRY

APERTURE

2 fixings for	Alternative 4 fixings	4 fixings
double gang	for double gang	for MK8
surface box	surface box	timeswitch

5Surface cable entries to the unit can be made from above, below or from the lefthand side. Conduit or recessed cable entry is through the aperture in the rear moulding.

6For surface cable entry remove the appropriate knockout and ensure one of the cable clamps is positioned correctly.

7Connections to the unit should be made as shown below:

N	L	6	5	4	3	2	1
				Links for 230V
				control
				circuit(s)
230V 50Hz							<![if ! IE]> <![endif]>12/01)(3016
			ON				<![if ! IE]> <![endif]>852-MK8
Mains Supply		OFF
				OFF			ON

Channel 2	Channel 1

If the control circuits are to operate at 240V then terminals L, 1 and 4 must be linked, ensuring that the cable is sheathed and of a size to carry the required load current.

If the control circuits are operating at voltages other than 230V then terminals 1 and 4 should be connected to the required power supply and not to terminal L.

8.Upon completion of wiring, plug in the ribbon cable ensuring the polarised plug is fully inserted into the socket. Refit the front half of the timeswich ensuring correctalignmentandthatnocablesaretrappedbefore

re-tightening the screws.

1

SPECIFICATION

Power Supply	:	230Vac, 50Hz
Switch Action	:	2 x SPDT, type 1 B
Switch Rating	:	10 to 253Vac, 50/60Hz, min 10mA, max 10 (4) A
Timing Accuracy	:	±1 min/month
Power Reserve	:	3 months on fully charged battery
Max. number of switching operations	:	up to 200 ON or OFF operations per week
Enclosure Rating	:	IP30
Max. Ambient Temperature	:	45°C
Designed to meet	:	BS EN60730-2-7
Overall Dimensions (mm)	:	228 wide x 115 high x 50 deep
Control Pollution Situation	:	Degree 2
Ball Pressure Test	:	75°C
Rated Impulse Voltage	:	2.5kV
Alternative position for
cable clamp		Polarised Plug
	THIS WAY UP
		N
Aperture for		L
cable entry		6
		5
		4
		3
4 fixing		2
holes		1

2 cable clamps					Terminal Block
					Rating & Model
	3 knock outs for
					label
	surface cable entry

Danfoss Randall can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss Randall 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 Ltd

Ampthill Road,

Bedford MK42 9ER

Tel: [phone] Fax: [phone]

Email: [e-mail]

Website: www.heating.danfoss.co.uk

2	Part No: 3078 Issue 8 12/05