Plum ecoMAX920P2-I, Operation And Installation Manual, Page: 32 / 48

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Diagram with heat buffer with layered charging buffer 7 , where: 1 – main controller module, 2- controller control
panel with room thermostat function, 3 – fireplace, 4 – heat buffer, 5 – automatic boiler, OUT-A – boiler pump, OUT-B –
fireplace pump, OUT-C - air valve open / close (optional), OUT-D - diverter valve (optional), S-P – solar pump, H1-P -
direct heating circuit pump, H2-P, H3-P - adjustable heating circuit pump, H2-M, H3-M - valve electrical servo of
adjustable circuit, C-P – circulation pump, H1-S - upper temperature sensor buffer, H4-S - center sensor buffer, H5-S –
exhaust temperature sensor (optional), SH - solar collector temperature sensor, SL – lower solar sensor, WS - weather
sensor, HDW - HUW tank temperature sensor (optional).
PROPOSED SETTINGS:
Parameter Setting MENU
Hydraulic diagram 6 menu  service setting  System
Pump starting temperature 50  C menu  service setting  Buffer
Pump stoping temperature 26  C menu  service setting  Buffer
Switching valve activation
temperature
55  C menu  service setting  Buffer
Selection heat source gas boiler menu  service setting  System  Main heat source
Disabling the absence of heat
demand
YES menu  service setting  System  Main heat source
Selection Fireplace menu  service setting  System  Additional heat source
Pump starting temperature 55  C menu  service setting  System  Additional heat source
Description: After heating the sensor H0-S temperature (55  C) shall be attached to the pump (OUT-B). Pump (OUT-B)
operates only when the temperature H0-S is greater than the temperature of H1-S. Pump H1-P, H2-PH3-P will turn on
when the temperature H4-S reaches 50  C and turn off when the temperature H1-S falls below 25  C. Boiler (5) turns on
when the temperature measured on the sensor H1-S is below the preset temperature, however, to turn on the boiler it
is necessary to decrease room temperature measured by the panel (2) below the preset. On the valve actuator (6) is
given an electrical voltage when the temperature measured on the sensor H4-S falling below 55  C (loading upper
buffer). A valve actuator (6) is turned off when the temperature measured at the sensor H4-S rises above 55  C (loading
throughout the volume of buffer).
7
The hydraulic diagram shown does not replace the central heating system design and is used for illustrative purposes
only!