5 . 7 C O N EC T I N G A N R T 1 6 D I G I T A L T H ER M O ST A T
Use 1.0mm² 4 core cable
Connections
– (Colours for reference only)
Connect Brown Live wire
– Terminal 1 of Heater and Terminal L on the Thermostat (230V Live connection).
Connect Grey Live wire
– Terminal 2 of Heater and Terminal 1 on the Thermostat. Grey wire carries 230v.when thermostat is on.
Connect Blue Neutral wire
– Terminal N of Heater and Terminal N on the Thermostat (230V Neutral connection)
Connect Green / Yellow wire
– Terminal
E or of Heater and Terminal E (Earth connection) on the Thermostat enclosure.
PLEASE CHECK ALL CONNECTIONS BEFORE TURNING ON AS INCORRECT WIRING IS NOT COVERED BY THE GUARANTEE
PLEASE NOTE:-Turn up fully the internal thermostat on the back of the heater so it does not override this thermostat.
6 . C O N E C T I N G H EA T ER S I N A M A ST E R SL A V E A R A N G EM E N T
IF USING THE HEATERS IN A MASTER / SLAVE ARANGEMENT PLEASE READ THE FOLLOWING IMPORTANT NOTES
BEFORE STARTING THE INSTALATION.
All OUH2 heaters may be connected in a Master / Slave arrangement.
The OUH2 heaters do not need to be the same Wattage or size.
Some OUH2 can be connected using 400v 3 phase supply and some Single phase and still linked as Master / Slaves.
If Using RCD (Residual Circuit Device) all Heaters connected in a Master / Slave arrangement MUST be supplied from the same
RCD
and not multiple RCD’s. Multiple MCB’s for each heater may and should be used as well.
The controls are always added to the master heater and NEVER to any of the slave heaters. You may designate any OUH2 heater
to be the master as long as you then follow the following.
1) Controls are only added to the master unit.
2) Controls if connected as shown in the wiring diagrams on pages 6
– 8 are protected by the master heaters internal 3A
fuse.
3) Link connections / cables (see section 7), if required are only added to the master unit.
4) You are full aware that if a slave unit is present in the system 400v ac may be present in the terminal blocks even if all
heaters are run on single phase due to supplies to each heater possibly being taken from different phases.
5) A maximum of 1 master and 15 slaves are used in each configuration.
6) Older OUH model heaters painted ivory in colour cannot be connected to these new OUH2 models.
The controls and heaters may be fed from a different
source and it is essential that all circuit breakers feeding
the heating system are isolated prior to any work being
carried out on any of the heaters in the system.
Links may be
required
– See
Section 7
9
