Plum ecoMAX 200 W, Operation And Maintenance Manual

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Set the value in accordance with the
boiler
manufacturer‟s
recommendations
12.6 Fuel shortage detection time n5
This is the time after which the regulator will
produce the fuel shortage alarm.
If the regulator produces the “No
fuel” alarm too fast, increase the
value of this parameter.
Recommended settings of the n5 parameter
depending on the method of detecting fuel
shortage:
Detection method n5 value
1 – boiler sensor 20min
2 – emission
sensor
10min
Methods of detection are specified in point
12.21.
12.7 Screen brightness n6
Increases or decreases the brightness of
display backlight.
12.8 Fan revolutions’ reduction
temperature n7
This parameter is applicable only if the boiler
regulation mode
= 1 – CLASSIC is
enabled. After the boiler reaches the boiler
preset temperature – n7 , the fan starts
reducing its revolutions until the boiler preset
temperature is reached. By default n7 = 5
 C.
Drawing 14 Fan revolutions‟ reduction with classic
regulation
12.9 Central heating pump down-time
by thermostat n8
This parameter determines the central
heating pump down-time after it is blocked
by disconnected room thermostat, at the
moment
of reaching preset room
temperature (point 11.10). As a result of
blocking the central heating pump, the
temperature in the heated rooms will drop,
and the boiler will reach the preset
temperature faster and switch to the
SUPERVISION mode. Yet, too long a
blockade of the central heating pump will
cause the system to cool down, which is
disadvantageous for maintaining the room
temperature at constant level. The heating
medium accumulated in the system has high
thermal inertia, and heating it after the
thermostat contacts are shorted can take too
long. Thus, it is not recommended to set
excessively long central heating pump down-
times. After the
central heating pump down-
time by thermostat (service parameter n8),
the regulator will enable it for a constant,
pre-programmed time of 30 s.
12.10 Fuel shortage detection methods
n9
This parameter determines the method of
detecting fuel shortage. If:
n9 = 1, fuel shortage is detected on the
basis of the boiler temperature readings T1,
point 14.1,
n9 = 2, fuel shortage is detected on the
basis of emission sensor T3 readings. Do not
set n9=2 if emission sensor is disconnected.
12.11 Lowering the preset boiler
temperature r0
Settings of lowering the preset boiler
temperature r0 are described in point 11.10.
12.12 Hot utility water tank hysteresis
r1
This is a drop of temperature below which
the hot utility water pump is restarted in
order to fill the hot utility water tank.
After setting a low value, the hot
utility water pump will start faster,
yet this is disadvantageous due to
frequent activation of the pump.