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Cod. 3541T090 - Rev. 00 - 06/2019

MANAGEMENT PARAMETERS HEAT PUMP AND BOILER IN HEATING MODE

13. MANAGEMENT PARAMETERS HEAT PUMP AND BOILER IN HEATING MODE

For heating mode it is possible to have two different heat pump and boiler activation logics depending on the parameters indicated in the following table and available

under the “8.2 REMOTE CONTROLLER - SERVICE menù” on page 50.

Parameter DESCRIPTION Parameter Factory setting Reference paragraph

T4HMIN Minimum external air temperature for heat pump heat mode -5°C “8.5 HEAT mode setting” on page 55

T4HMAX Maximum outside air temperature for heat pump heat mode 25°C “8.5 HEAT mode setting” on page 55

T4_AHS_ON External air temperature for boiler activation 2°C “8.10 AHS (bolier)” on page 57

t_ASH_DELAY Boiler activation delay 30 min “8.10 AHS (bolier)” on page 57

13.1 Boiler in integration to the heat pump (factory setting)

With external air temperature greater than (T4_AHS_ON - 2) the system heating is guaranteed by the heat pump only

See “fig. 171 - Heating with heat pump” on page 85

With external air temperature between (T4HMIN) and (T4_AHS_ON - 2) the system heating is guaranteed by the heat pump and the boiler: the boiler will be activated

if after the time (t_AHS_DELAY) the heat pump does not satisfy the setpoint.

See “fig. 173 - Heating with heat pump and boiler” on page 85

With external air temperature lower than T4HMIN the heating system is guaranteed only by the boiler.

Functional diagram with factory settings

-5

T4HMIN

-4

T4HMIN + 1

-20

OFF

BOILER

RISCALDAMENTO IMPIANTO