Ahs (Additional Heating Source, Gas Bolier) - Ferroli OMNIA H Series Installation, Maintenance And User Manual

AHS (Additional Heating Source, gas bolier)

If an additional heating source (for example a gas boiler) is
available, please select YES at the corresponding position.
Press OK and the following page is displayed:
When the cursor is on HEAT MODE or DHW MODE, Use ◄► to select YES or NON. If YES is selected, the additional heating
source will be available in the corresponding mode, otherwise it will be unavailable.
NOTE: If YES is selected in DHW MODE, the installation of an additional heating source should follow "8.5 Application 5/Applica-
-tion b"
When the cursor is on T4_AHS_ON, dT1_AHS_ON, dT1_AHS_ OFF or t_AHS_DELAY, Use ◄ ► and ▼ ▲ to scroll and adjust
the parameter.
T4_AHS_ON is the outdoor air temperature for starting the
additional heating source. When the outdoor air temperature
rises above T4_AHS_ ON, the additional heating source will
be unavailable. The relationship between the operation of ad-
ditional heating source and outdoor air temperature is shown
in the picture below:
dT1_AHS_ON is the temperature difference between T1S
and T1B for turning the additional heating source on(only
when T1B<T1S-dT1_AHS_ON), dT1_AHS_OFF is the tem-
perature difference between T1S and T1B for turning the ad-
ditional heating source off (when T1B≥T1S+dT1_AHS_OFF
the additional heating source will turn off), t_AHS_DELAY
is the time that the compressor has run before starting the
additional heating source. It should be shorter than the addi-
tional heating source start time interval.The operation of the
heat pump and the additional heating source is shown below.
38
SETUP OF THE SYSTEM
Heat mode
Heat mode
by AHS only
by AHS only
dT1_AHS_ON
dT1_AHS_OFF
Compressor
7.2 ADDTIONAL HEATING SORUCE
HEAT MODE
DHW MODE
T4_AHS_ON
dT1_AHS_ON
dT1_AHS_OFF
t_AHS_DELAY
Heat mode
Heat mode by heat
by heat pump and AHS
pump and AHS
T4HMIN
T4_AHS_ON
T1s-T1B T4＜T4_AHS_ON
ON
OFF
AHS
ON
OFF
t_AHS_delay
YES NON
YES NON
-5 °C
5 °C
0 °C
30MIN
SCROLL
Heat mode
Heat mode
by heat pump
by heat pump OFF T4
T4HMAX
ON
OFF
Time
t_AHS_delay