Tank Heater (Electrical Heater For Dhw Tank); Disinfect - Ferroli OMNIA H Series Installation, Maintenance And User Manual

Tank heater (electrical heater for DHW tank)

If tank heater (booster heater) is avaliable, Go to FOR SERVICEMAN >DHW MODE SET-
TING>1.2 TANK HEATER and select "Yes", when "OK" pressed, the following page will appear:
Use ◄ ► and ▼▲ to scroll and adjust parameters. Use BACK to exit.
dT5_TBH_OFF is the temperature difference between T5 and T5S that turns the booster heater off. The booster heater will turn
off (T5≥T5S+dT_TBH_OFF) when the heat pump malfunctions.
T4_TBH_ON is the temperature only when the outdoor air temperature is lower than its parameter and the booster heater will be
available.
t_TBH_DELAY is the time that the compressor has run before starting the booster heater (if T5<min (T5S,T5stop)).
The operation of the unit during DHW mode described in the picture below:
In the picture, T5stop is a parameter related to outdoor air
temperature, which cannot be changed in the user interface.
When T5≥T5stop, the heat pump will turn off.
Note:
If the booster heater is unavailable (1.2 TANK HEATER NON
is selected), the dT5_ON cannot be adjusted and is fi xed at 2.
☞
NOTE
The booster heater of DHW tank (THB) and backup heater of the system (electrical booster IBH) can't operate simulta-
neously, if the booster heater has been on, the backup heater will be off and viceversa.

Disinfect

To enable disinfect function,Go to MENU> FOR SERVICEMAN>DHW MODE
SETTING>1.3 DISINFECT and select "YES", when "OK" pressed, the following
page will appear.
T5S_DI is the target temperature of water in the domestic hot water tank
in the DISINFECT function.
t_DI_HIGHTEMP is the time that the hot water will last.
t_DI_MAX is the time that disinfection will last. The change of domestic
water temperature is described in the picture below:
Be aware that the domestic hot water temperature at the hot water
tap will be equal to the value selected in FOR SERVICEMAN
"T5S_DI" after a disinfection operation.
SETUP OF THE SYSTEM
min(T5S,T5stop)-dT5_on
T5
T5S+dT5_TBH_OFF
T5S
T5stop
COMP.
OFF
TBH
t_TBH_delay
T5
T5S_DI
T5S
1.2 TANK HEATER
dT5 TBH OFF
T4_TBH_ON 20°C
_TBH_DELAY 90 MIN
SCROLL
ON
OFF
ON
OFF
Time
1.3 DISINFECT
T5S_DI 65 °C
t_DI_HIGHTMEP. 30 MIN
t_DI_MAX 120 MIN
SCROLL
t_DI_HIGHTEMP
t_DI_MAX
5 °C
t
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