Elesta RTM508B Mode D'emploi page 17

in a chain.
 The auxiliary output will be switched on/off according to
the status of the channels present on the same module.
If the "share auxiliary output" option is enabled, the relay
will be controlled according to the status of the channels of
all modules connected in cascade to one another.
If the option is disabled, the auxiliary output relay will be
switched on or off depending solely on the status of the
outputs present on the module to which the relay itself
belongs.
DIP-SWITCH 4: Heating/Cooling selection via external
input
 The Heating/Cooling status is determined by the external
Heating/Cooling input.
 The Heating/Cooling status is determined by the
thermostat transmitter.
When the "Heating/Cooling selection via external input"
option is enabled, the external Heating/Cooling contact will
determine the operating mode for all thermostat-controlled
channels of the module.
See the paragraph on "External Heating/Cooling input" for
further information.
If the system you are installing does not require any
particular options to be enabled, it is sufficient to leave all
DIP-switches in the "0" ()position.
Heating/Cooling selection
The relay module is factory configured (DIP-switch 4 down)
so that that the Heating/Cooling status of each channel will
be determined by the setting of the associated thermostat
transmitter.
However, if a chronostat is present in the system, it will
override the thermostat settings and impose its own Heating/
Cooling status on all thermostat-controlled channels,
including those of other modules connected in cascade to the
same active antenna.
This makes it possible to change over the mode selection
easily by means of a single device (chronostat) without
having to adjust every thermostat individually.
If there is more than one chronostat in the system, the one
controlling the lowest channel (in the module closest to the
antenna, in the event of a number of cascade-connected
modules) will override the others in determining the Heating/
Cooling status.
The Heating/Cooling status of a chronostat can never be
changed via the relay module: it must always be adjusted
manually. The options permitting a global Heating/Cooling
changeover apply only for the channels controlled by
thermostats.
If the relay module is configured so that the Heating/Cooling
status is determined by an external input (DIP-switch 4 up),
the thermostat-controlled channels will take on the status
defined by the external contact. However, the module cannot
change the Heating/Cooling status of any channels controlled
by chronostats.
In cases where a chronostat is present in the system, it is
not convenient to use the "Heating/Cooling selection via
external input" option since you can change the Heating/
Cooling setting of all thermostat-controlled channels simply
by changing that of the chronostat.
The status of the external Heating/Cooling input is
communicated to all the modules connected in cascade.
Therefore, it is not necessary to connect the inputs of
several modules in parallel: it is sufficient to connect the
switch to one module in the chain in order to change the
Heating/Cooling status of all channels in the system.
If a thermostat-controlled channel has been associated with
a chronostat, the channel will always take on the Heating/
Cooling status of the associated chronostat, irrespective of
the setting of DIP-switch 4.
External "Heating/Cooling" input
If the "Heating/Cooling selection via external input" option
is enabled (See paragraph on "DIP-switch options"), the
external Heating/Cooling contact will determine the operating
mode for all thermostat-controlled channels of the module:
contact open: heating mode
contact closed: cooling mode
See the paragraph on "Heating/Cooling Selection" for further
information and also in the event that a chronostat is present
within the system.
"Global standby" input
To the "Global standby" input it is possible to connect a
contact which, when closed, will cause all channels of the
module to switch off.
When the contact is open, normal operation will resume.
Even the channels controlled by a chronostat will be switched
off by the global standby input.
If the system is operating in the heating mode (as determined
by the Heating/Cooling status of a chronostat or an external
input or, in the absence of the latter, by the thermostat
settings), the antifreeze function will be activated with a
fixed setpoint of 6.0°C to prevent the temperature within
the rooms from falling below this value.
"Economy" input
When closed, the external "Economy" input will cause all
thermostat-controlled outputs to regulate temperature at the
reduced economy setpoint. See paragraph on "Associating
thermostats with a chronostat".
By connecting an external clock switch to the "Economy"
input you can reduce the temperature setting during the
desired periods of the day.
Maintenance
This product requires no particular maintenance.
Once the system is installed and operational, it is good
practice to check periodically that the quality of the signal
received is good.
If the signal is weak or absent on one or more channels,
the corresponding LEDs will blink: this could occur if the
batteries are low.
If the fuse has blown (see "Troubleshooting"), disconnect
the power supply and check the electrical system and valves
used. Replace with a fuse of the same type and rating.
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