M C Series – Warm air heaters – Installation, Operation and Maintenance Manual
14
Ed.
04/2007
8.
If ignition has taken place as expected, set the thermostat to the desired
temperature.
If the burner is ignited after a prolonged period of inactivity or for the first time, it may
be necessary to repeat the operation several times as a result of air in the pipes.
SWITCHING OFF
You will need:
the heater connected to the power and gas supply.
1.
To switch off the appliance, set the thermostat to minimum. The burner goes out,
while the fans continue to operate until the appliance has cooled down completely.
)
The appliance must never be switched off by removing electrical power, as this stops
the fans immediately and activates the limit thermostat, which then must be reset
manually.
SUMMER OPERATION (VENTILATION)
To change from winter to summer operation (fan operation only) easily and immediately it
is possible to substitute the control box supplied as standard with the O-CTR000
command (available as an accessory – see Figure 17) which has a summer/winter switch.
This command makes it possible to change from summer to winter operation by closing
the gas valve by placing the summer/winter switch in the summer position (the “sun”
symbol).
Alternatively,
professionally qualified personnel
can set up the appliance for summer
operation as shown in “HOW TO MAKE THE ELECTRICAL CONNECTION FOR
SUMMER OPERATION” on page 29.
SEASONAL SWITCH-OFF
1.
Switch off the appliance (as described in SWITCHING OFF) and wait for the fan(s)
to stop.
2.
Close the gas supply valve of the appliance.
3.
If the VENTILATION function is not to be used, cut off electrical power to the
appliance using the bipolar switch located on the power supply line.
