Switch On Power Supply; Switching On Main Power - Buderus Logamax plus GB162-80 kW Service Instructions Manual

section 79

Switch on power supply

ON
OFF
 Switch on the power supply to the heating system.
section 80

Switching on main power

110
100 120
130
90
140
 Put the main power switch [1] on the control panel in position
"1" (On).
20 30
10
psi
100
90
3
 Press the "Service" button [1] a number of times until the
pressure is displayed (e.g.
from the analog pressure gauge [3] in the pump group.
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
130
110
150
90
170
190
2
110
130
110
150
120
90
P22
130
140
1
1
[p/2/2|
, [2] or read out the pressure
 Purge all radiators in the heating system. Start at the lowest
floor of the premises and then work your way up from floor to
floor.
If the boiler has been in use for approx. one week and the pres-
sure reading on the display is less than 14 PSI, the system has
to be topped up. The pressure loss in a heating system is
caused by air bubbles escaping via screw connections and
(automatic) air purging units. The oxygen contained in the fresh
heating water will also escape from the heating water after
some time and cause the water pressure in the heating system
to drop.
Should it be necessary to top up the heating system more fre-
quently because the water pressure keeps dropping, water is
probably escaping due to a leakage in the heating system or a
defective expansion vessel. In this case the cause of the water
loss must be removed as soon as possible.
170
190
 Drain the pump by removing the vent screw at the front of the
A
pump [1].
CAUTION!
Since a little heating water may escape when purging the
A
pump you are advised to lay a dry cloth under the pump.
CAUTION!
Correct purging of the pump will help ensure that it runs
for its specified service life. The sliding bearing located
behind the vent screw is lubricated by the heating water.
 Check the water pressure of the heating system after all air
has been purged from the heating system. If the water pres-
sure is less than 14 PSI, the heating system has to be topped
up again as described above.
Actions 7
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