Ferroli PEGASUS D Ki 100, Instructions For Use Manual

Page: 14 / 204

PEGASUS D Ki 100
14
EN
cod. 3540L870 - 03/2009 (Rev. 00)
3. Service and maintenance
3.1 Adjustments
All adjustment, conversion, start-up and maintenance operations described below must only be carried out by Qualified
Personnel (meeting the professional technical requirements prescribed by current regulations) such as those of the Lo-
cal After-Sales Technical Service.
TEST mode activation
Press the heating buttons (part. 3 and 4 - fig. 1) at the same time for 5 seconds to activate TEST mode. The
boiler lights at maximum power.
The heating symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the display.
fig. 18 - Operation in TEST mode
To deactivate TEST mode, repeat the activation sequence.
In any case, TEST mode is automatically deactivated after 15 minutes.
Heating system output adjustment
On PEGASUS D Ki 100 boilers, the firebox heating power and therefore the heat output delivered to the heating water
can only be adjusted by means of the main burner through the gas valve, (see fig. 19). The diagrams given in the section
cap. 4.2 "Pressure losses" indicate the variation in heat output delivered to the water according to the change in burner
operating pressure. Being able to adjust boiler output to the actual heating requirements means above all reducing heat
losses, and therefore obtaining fuel saving. Also, with the variation in output, also regulated by the provisions, the boilers
keep their efficiency levels and combustion characteristics practically unchanged
This operation is carried out with the boiler working and the water storage tank heated.
1. Using a small screwdriver, remove the secondary operator protection cap 5 of the gas valve of fig. 19.
2. Connect a manometer to the pressure point 2 (fig. 19) located below the gas valve, and turn the boiler thermostat
knob to the maximum value.
3. Adjust the pressure to the required value by means of the screw 6 (fig. 19), referring to the diagrams given in section
cap. 4.2 "Pressure losses".
4. Then turn the burner on and off 2 or 3 times by means of the control thermostat and check that the pressure value
is that just set; otherwise, another adjustment must be made to bring the pressure to the correct value.
eco
comfort
m
o
d
e
r e s et
eco
bar