Ferroli OMNIA S HYBRID C 3.2 Installation, Use & Maintenance Manual Download

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Cod. 3542B250 - Rev. 00 - 02/2022

OMNIA S HYBRID C 3.2

Example 1:

T1Sh = 50°C

dT1Sh = 5°C

Texternal air = 5°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 65°C, so

Twoutmax (before switch-off) = minimum value between 65 and 55 = 55°C.

NB: the boiler may or may not start in integration to the heat pump based on the parameters set In the heat pump service menu. If there is a block due to a heat pump

alarm, the boiler will be activated to reach the same Twoutmax value which the heat pump should have reached, i.e. 55°C. When this value is reached, the boiler will

be switched off.

Boiler only operation with heat pump stopped due to operating limit reached:

Twoutmax (before the boiler is switched off) = T1Sh+dT1Sh+5°C where:

•

dT1Sh parameter which can be set under heat pump service menu (see “9.2.2 Heat pump service menu" on page 59).

Example 2:

T1Sh = 60°C

dT1Sh = 15°C

Texternal air = 5°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 65°C, so Twoutmax (before the heat pump switches off) = lower

value between 65 and 75 = 65°C.

: the boiler may or may not start in integration to the heat pump based on the parameters set in the heat pump service menu. If the heat pump is blocked due to an

alarm or reaching the operating limits (in this case when T1 water temperature output from the unit = T1stop = 65°C), the boiler with either be already activated or will

be activated, in any case, to reach the value of Twoutmax = 60+15+5=80°C

11.5.2 Cooling mode

The cooling setpoint (T1Sc) can be modified by the user between 5 and 25°C via the display (see “8.4 DHW and system set point configuration" on page 49). The

Twoutmin minimum cold water temperature sent to the system before the heat pump is switched off is calculated as follows:

Twoutmax (when the heat pump switches off) = maximum value between T1Sstop and T1Sc)

where:

•

T1stop = minimum temperature allowed to not operate outside he operating limits (see “3.3 Heat pump operational limits" on page 20)

Example 3:

T1Sc = 7°C

Texternal air = 25°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 5°C, so,

Twoutmax (before switch-off) = maximum value between 5 and 7 = 7°C.

Example 4:

T1Sc = 7°C

Texternal air = 10°C

In these external air conditions, the heat pump has an operating temperature limit (T1stop) equal to 11°C, so,

Twoutmax (before switch-off) = maximum value between 11 and 7 = 11°C.

11.6 Setting DHW temperature production

The DHW setpoint (T5S) can be modified by the user between 30 and 55°C via the display (see “8.4 DHW and system set point configuration" on page 49). To

change the maximum value of the DHW setpoint, parameter P46 must be changed (see “Menu for modifying the [TSP] parameters" on page 51.

12. TROUBLESHOOTING

This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit.

LCD display off

If after touching the keys, the display does not switch on, check that the board is connected to the power supply. Check for the supply voltage using a digital multimeter.

If there is no voltage present, check the wiring.

If there is a suitable voltage (Range 195 – 253 Vac), check the state of the fuse (3.15AL@230VAC). The fuse is located on the board. To access it, see “fig. 59 -" on

page 82.