LOCATION
The heater must be installed at least 2.0m above floor
level. All round minimum clearance dimensions must be
observed.
For optimum effect the heater should be mounted as close
as possible to the top of the doorway. The maximum
recommended mounting height is 2.3m for 3kW and 2.8m
for 4.5, 6.0 and 9.0kW units.
The heater is designed to take input air from the
ceiling void it is therefore imperative that a suitably
sized inlet grille is provided within the ceiling or
enclosure.
The heater must not be covered or the airflow impeded
in any way.
If one inlet grille is at its minimum dimension the other
must have an unrestricted airflow
CONTROL
Remote Switch
Thermostat (CRST16 )
The Remote Switch Unit allows ON/OFF, Fan only with 1,2 or 3 kW.
If a thermostat is required a unit of sufficient current carrying capacity (16A) can be connected in the power
supply to the Remote switch thus switching the heater off when set temperature is reached.
Alternatively it can be connected to
Remove the ìfan switchî to ìheat switchî links and link the supply side of the heat
switches together then connect the thermostat between the fan switch and the heat switches.
control the heating elements only, the fan will run continuously
maintaining air circulation.
CONTENTS
- grille frame and 2 no roundhead woodscrews
Remove from carton and check contents ;
- heater unit
- 2 no support brackets, 4 no. machine screws and 4 no woodscrews
- ODH-RSW three switch control unit
- 25mm cord grip bush and locknut
ELECTRICAL CONNECTION
The heater should be installed in accordance with the latest edition of the IEE Requirements for Electrical
Installation (BS 7671:2001)
The unit should be permanently connected to a suitable 230Vac power supply incorporating a means of
isolation having a contact separation of at least 3mm in all poles.
remote switch unit in suitable location.
Select cabling with 4 cores and earth and of appropriate size for current and volt drop.
Pass cable/s through cord grip in back of unit. Leave sufficient length for connection but ensuring cables do
not foul blower unit. Make off connections to connector block and earth stud in accordance with circuit
diagram RDH-W-001 (copy on back page )
If remote switching is not required connect power supply to L and N and link L,LI and LII with 2.5sqmm
cable.
Tighten up cord grip. Replace cover.
Remove heater cover, position heater in ceiling (See Fixing). Fix
A means of disconnection having a contact separation of 3mm in all poles should be incorporated.
IMPORTANT : always check to ensure the heating elements cannot be energised without the fan
running.
WARNING THE HEATER MUST BE EARTHED
OVER TEMPERATURE CUT OUT
To RESET -
Should the heater exceed normal operating temperature the over temperature cut out on the heating
elements will operate.
switch off power to the unit and allow to cool before switching on again. If the problem persists
consult a suitably qualified person.
min
20
min
100
min
30
SAFETY
The correct procedures for working at height must be adopted when installing this heater.
The heater must be installed by a suitably qualified person in accordance with current regulations.
