Additional protective wire guard available - Model 520G (285mm
x 305mm x 125mm)
Voltage 230 Vac
IP Rating IP 21
Class 1 This appliance must be earthed
Mains Flex H05VV-F3G0, 0.75mm²
Weight Approx 1.0kg
Height Approx. 24cm
Width Approx. 24cm
Depth Approx. 10.5cm
Thermostat Approx. 5°C to 35°C
The 520 wall mounted frost protection heater with thermostat
is for keeping small rooms free from frost. It is for use
within the home or for similar purposes. The heater must
only be used in a fixed position and only for the purpose
described. The heater must not be used outdoors.
The heater should not be installed in areas which are a
fire risk, such as garages, stables, or wooden sheds. This
also applies for rooms in which highly combustible gases,
vapours or dust can develop.
Do not cover the heater as there is the danger of fire
|Minimum required clearances :
|From Floor :
|From Adjacent Walls :
|From Ceiling :
The heater must not be installed in a shower or bathroom
The surface of the heater gets hot. Do not install directly
below an electrical socket.
Do not use the heater when the unit or mains cable are
defective or damaged. Repairs are only to be carried out
by a qualified person.
If the mains cable is damaged, it should only be replaced
by the manufacturer or by a suitably qualified after sales
service, in order to avoid risks. Non user serviceable.
If the heater is to be connected with a plug, the plug
must be accessible.
The heater is ready for use even when at the lowest setting.
In order to switch off the frost watcher pull out the mains
supply plug or turn off the permanently installed isolator
(e.g. Circuit breaker, switched spur etc.).
The heater is an electrical natural convector heater. It
is fitted with a thermostat for the correct temperature
and a safeguard against overheating. A control lamp lights
up when the heater starts to heat up. The thermostat controls
the room temperature and switches the heater on or off as
necessary. The built in device for guarding against overheating
switches the heater off if an overheat situation occurs,
it will reset itself again after the heater cools down sufficiently.
The heater is always ready for use. To switch off the heater,
pull out the plug at the mains.
Mounting and electrical connections
Be aware of keeping to the minimum distances specified.
Fix the mounting bracket to the wall. Two dowels (6mm dia.)
and fixing screws are provided with the unit. Make sure
the mounting bracket is fixed vertically. Screw out the
safety screw on the heater. Hang the heater into the mounting
bracket, first to the lower and then to the upper claw.
Screw in the safety screw. After connecting the plug to
the socket the heater is then ready for use.
The heater can also be permanently connected to the power
supply by means of a suitable junction box. This must only
be carried out by a suitably qualified person. This unit
must be EARTHED. It must be ensured that if the heater is
permanently connected to the power supply, it can be isolated
by means of a fused switch or circuit breaker.
The rotary knob and the markings on the casing show the
setting of the thermostat.
The heater is intended to protect areas from frost. The
frost setting will normally be sufficient, if the area is
draughty adjust the thermostat slightly clockwise to compensate.
Taking care of your 520 heater
Before cleaning the heater disconnect the plug from the
mains and let it cool down. Clean the casing occasionally
with a damp cloth. Do not use strong cleaning materials
and do not let water get inside.
|Does not heat up
(Control lamp does not light)
|Check fuse box
|Reconnect the plug
|Room temperature higher than the
|If possible set a higher setting
for test, then reset to frost setting
|Overheat device has reacted
|Do not cover the unit with any
object. Keep to min specified distances
If the fault cannot be rectified by any of the above, contact
your local electrician or get in touch with our after sales
For added protection fit the optional protective guard
We reserve the right to make changes.
GENERAL MAINTENANCE ON ELECTRIC HEATERS
Prior to commencing any period cleaning or servicing always
ensure the supply to the heater is completely isolated Bush
Nelson Electric heaters are factory assembled and tested
they are non user serviceable.
The heaters are intended to operate for many years, problem
Maintenance is limited to keeping both the inlet and outlet
areas free from any accumulation of dust or any other foreign
materials. This is especially important immediately before
the heating season. Any dust build up can be loosened using
a brush and a vacuum cleaner applied to the airways to ensure
completed removal of any dust . When the heater is first
turned on after cleaning an unusual odour may be noted,
this is due to the dust particles which inevitably will
be disturbed and will be burnt off from the heating element.
If in any doubt always consult a qualified heating and
ventilation engineer / electrician for advice.
WARRANTY. Your Bush Nelson Heater is guaranteed
for the period of one year from the date of purchase. We
will repair or replace at our discretion any part found
to be defective.
Bush Nelson cannot assume any consequential liability. This
guarantee in no way prejudices your rights under common
law and is offered as an addition to consumer liability