Plum ecomaxx 800 R2 User Manual

37
Max. HUW temperature
This parameter is available upon connection of HUW
sensor. It defines max. temperature to which HUW
container will be heated-up during discharge of excess
heat from the boiler in emergency conditions. This
parameter is important, because setting of too high
value may cause the risk of burning the user with hot
utility water. On the other hand, too low value of this
parameter will cause that in case of boiler overheating
excessive heat cannot be removed to HUW container.
When designing HUW system, possibility of regulator
failure should be considered. In case of regulator failure,
water in HUW container may be heated-up to hazardous
temperature, which may create the risk of user's
burning. Therefore, some other protection (e.g.
thermostatic valves) should be used.
Incr. boil.temp. for HUW and
mixer
This parameter determines by how many degrees the
preset boiler temperature will be increased to fill HUW
container, buffer and mixer circuit. Temperature is
increased only if required. Once the preset boiler
temperature has reached sufficient value to fill HUW
container, buffer and mixer circuit, the regulator stops its
further increase.
HUW operation ext.
This parameter is available upon connection of HUW
sensor. Once HUW container has been filled and HUW
pump has been stopped, a boiler overheating risk may
occur. It occurs in case the preset HUW temperature is
higher than the preset boiler temperature. This issue
refers particularly to the operation of HUW pump in
SUMMER mode, when CH pump is OFF. To cool down the
boiler, duration of HUW pump operation may be
extended by the time set in HUW pump operation
extension time.
Circulation support
This parameter switches on/ off operation of circulating
pump. Upon activation in the user menu, the position of
HUW circulating pump is displayed. Note: this function is
available only in case Output H is set at circulating
pump or mixer 1 support = OFF or pump only.
Boiler shunt pump H1
Difference between temperature of the boiler and boiler
return at which boiler shunt pump switches on has to
meet the condition: H1>H2. To have this parameter
available, Output H has to be set at ”Boiler Shunt
Pump”.
Boiler shunt pump H2
Difference between temperature of the boiler and boiler
return at which boiler shunt pump switches off has to
meet the condition: H1>H2. To have this parameter
available, Output H has to be set at ”Boiler Shunt
Pump”.
Heat exchanger
It refers only to hydraulic systems with heat exchangers
connected between open and close circuit. Available
options:
YES (boiler pump is in continuous operation in a
limited circuit: boiler - heat exchanger; it is not
exclusive e.g. from SUMMER function or HUW
priority),
NO (boiler pump in operation as usual).

Plum ecomaxx 800 R2 Specifications

General

Brand	Plum
Model	ecomaxx 800 R2
Category	Thermostat
Language	English