Plum ecoMAX 80 R1, Инструкция по эксплуатации

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off. Detailed information can be found in
point 13.12.
14.17 Alarms – signalling setup
Detailed information can be found in point
13.13
14.18 Boiler cooling temperature
The temperature at which the boiler is
preventatively
cooled down. Detailed
description can be found in point 19.3.
It is suggested to set the boiler
cooling temp. below the value of
activating the safety temperature
limiter,
which will prevent
interruptions in the boiler work due
to overheating.
15 CH and DHW SERVICE SETTINGS
15.1 CH start temperature
This parameter specifies the temperature at
which the central heating pump is activated.
After reaching the temperature equal to the
CH start temp. parameter, the central
heating pump is activated. This protects the
boiler against retting caused by its being
cooled down by hot water returning from the
system.
Disabling the CH pump on its own
does not guarantee protecting the
boiler against retting, and the
resulting corrosion of the boiler. Use
additional automatics, e.g. a four-
way valve.
15.2 CH pump standstill time
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 13.11). 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 then switch to the
CONTROL 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
CH standstill time , the
regulator will enable it for a constant, pre-
programmed time of 30 s. Caution: Blocking
the CH pump can make the boiler overheat.
15.3 CH pump standstill with DHW priority
Prolonged filling of the DHW tank when DHW
priority is enabled can cause extensive
cooldown of the CH system, as, with these
settings, the CH pump is disabled.
The parameter
CH stand. load DHW prevents
this by enabling periodical activation of the
CH pump while the DHW tank is being filled.
After this time, the CH pump will be
activated for a constant, programmed time of
30s.
15.4 Maximum DHW temperature
This parameter specifies to what maximum
temperature will the DHW tank be heated in
the case of dropping excessive heat from the
boiler during an emergency. This parameter
is very important, as setting it at too high a
value can scald the users. Too low a value of
this parameter will make it impossible to
channel excessive heat to the DHW tank if
the boiler overheats.
When designing the domestic hot
water system, the possibility of
regulator malfunction should be
taken into consideration. As a result
of malfunction of the regulator, the
water in the DHW tank can become
dangerously hot, threatening the
users with scalding.
THEREFORE, ADDITIONAL SAFEGUARDS -
THERMOSTATIC VALVES - SHOULD BE
USED.
15.5 DHW tank hysteresis
Below the preset DHW temp. – DHW cont.
hysteresis the DHW pump is activated in
order to fill the DHW tank.