Adjustment Of The Air Damper Motor; Spray Temperature Adjustment - Riello PRESS 30 N Manuel D'entretien

4.4

ADJUSTMENT OF THE AIR DAMPER MOTOR

STOP - Blue lever
This lever leaves the factory vertically positioned and corre-
sponds to the complete closing of the air damper. A partial
opening of the air damper might be obtained by moving left-
wards this lever (+ on the label).
The new position of the air damper is detectable when the burn-
er is off. Do not overcome the position of the orange lever for the
st
1 stage.
st
1 STAGE - Orange lever
The orange lever controls the air damper position for the first
flame, it is adjustable both for opening and closing.
nd
2 STAGE - Red and black levers
The red lever controls the air damper position for the second
flame, it is adjustable both for closing and opening.
The black lever controls the opening of the second oil valve and
it must always anticipate - for a bit - the red lever, but never the
orange one.
4.5

SPRAY TEMPERATURE ADJUSTMENT

Thermostat for adjustment - maximum value - minimum value
Adjustment thermostat prevents the burner start up if the fuel temperature has not reached the required value
for a good spray as indicated in the diagram below.
2
mm /s °E
D2640
Example
Fuel oil with viscosity of 7 °E at 50 °C is pre-heated to approximately 110 °C.
The thermostat has to be generally set at a value higher than the required one (120°C indicated on the knob to
get approximately 100°C at the nozzles).
The value read has to be done after some minutes of performance and later the necessary adjustments could be
carried out.
Minimum value contact thermostat intervenes by stopping the burner if the fuel temperature decreases under
the value necessary for a good combustion.
Maximum value contact thermostat switches off the resistances when in case of failure of the adjustment
thermostat, the temperature increases inside the pre-heater. In case of abnormal temperature, make sure of the
regular functioning of control thermostat and of the resistance in contact with the probe of the thermostat.
5827
Black lever
Red lever
Orange lever
Blue lever
°C
Spray temperature
6
GB
Opening + – Closing
D2638
Sheath for thermometer
Adjusting knob
of thermostat
Pre-heater
Purge
D2641