Danfoss 852 Assembly instructions

1
Seven Day Two Channel Electronic Timeswitch
Model 852
Installation and Wiring Instructions
Themodel852timeswitchmustbe installedbyacompetent
electrician and theinstallation shouldconformtoIEEWiring
Regulations.
Installation and Wiring
1 Slacken 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.
2 Remove the polystyrene packing piece from the top
of the transformer. It is marked “REMOVE”.
3 Select thedesiredfixingposition andobservethelabel
“THIS WAY UP”inside the rear portion. The two halves
will only assemble correctly one way round.
4 Four 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.
5 Surface 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.
NL1
2
3
4
5
6
Links for 230V
control
circuit(s)
230V 50Hz
Mains Supply
Channel 2
OFF ON
Channel 1
OFF ON
MK8-852 (3016 12/01)
NL6
PART NO: 8/3223 Double Gang Surface Box Adaptor
CABLE
ENTRY
APERTURE
2 fixings for
double gang
surface box
Alternative 4 fixings
for double gang
surface box
4 fixings
for MK8
timeswitch
PART NO: 8/3222 Square Conduit Box Adaptor
6 For surface cable entry remove the appropriate
knockout and ensure one of the cable clamps is
positioned correctly.
7 Connections to the unit should be made as shown
below:
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.
CABLE
ENTRY
APERTURE
4 fixings for existing
square conduit box
4 fixings for
MK8 timeswitch

2
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: [email protected]
Website: www.heating.danfoss.co.uk
Part No: 3078 Issue 8 12/05
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
N
L
6
5
4
3
2
1
THIS WAY UP
Alternative position for
cable clamp
Aperture for
cable entry
4 fixing
holes
2 cable clamps
3 knock outs for
surface cable entry
Rating & Model
label
Terminal Block
Polarised Plug