Dhw Priority; Dhw Pump Ricircolo - Ferroli OMNIA H Series Installation, Maintenance And User Manual

WARNING
If this high domestic hot water temperature can be a potential risk for human injuries, a mixing valve (fi eld supply) should be
installed at the hot water outlet connection of the domestic hot water tank. This mixing valve will ensure that the hot water tem-
perature at the hot water tap never rises above a set maximum value. This maximum allowable hot water temperature shall be
selected according to local laws and regulations.

DHW priority

To set the priority between domestic water heating and space operation Go to
SERVICEMAN>DHW MODE SETTING>1.4DHW PRIORITY:
The function of the DHW PRIORITY is used to set the operation priority between domestic water heating and space (heating/
cooling) operation. You can use ◄ ► and ▼▲ to scroll and adjust parameters. Using BACK to exit.
T_DHWHP_MAX is the maximum continuous working period of the heat pump in DHW PRIORITY mode.
T_DHWHP_RESTRICT is the operation time for the space heating/ cooling operation.
If DHW PRIORITY is enabled, the operation of the unit is described in the picture below:
If NON is selected in the DHW PRIORITY mode, when it is available and the space heating/cooling is OFF, the heat pump will
heat the water as required. If space heating/cooling is ON, the water will be heated as required when the booster heater is una-
vailable. Only when the space heating/cooling is OFF will the heat pump operate to heat domestic water.
DHW recirculation pump
If the DHW pump( P_d) is avaliable, Go to FOR SERVICEMAN >DHW MODE SETTING>1.5DHW PUMP and select "YES",
when "OK" pressed, the following page will appear,You can use ◄► and ▼▲ to scroll and adjust parameters. Use BACK to exit.
When the TIMER RUNNING is ON, the DHW pump will run as timed and keeps running
for an certain time (as defi ned in PUMP RUNNING TIME), this can ensure the tempera-
ture of water in the system are uniform.
When DISINFECT is ON, the DHW pump will operate when the unit is in disinfect mode
and T5≥T5S_DI-2. Pump run time is t+5min.
The recirculation pump ACS allows you to mix the water tank and make more effective
the disinfect function.
32
SETUP OF THE SYSTEM
T5
Min (T5S,Tstop)
Min (T5S,Tstop)-dT5_on
Heating
water
Heating
water
t_DHWHP_max
Restart
Space
heating
Space Heating
/ cooling
heating/
water
Heating
operation
Time
cooling
Time
operation
water
t_DHWHP_restrict
1.4 DHW PRIORITY
t_DHWHP_MAX 180MIN
t_DHWHP RESTRICT 180MIN
SCROLL
1.5 DHW PUMP
TIMER RUNNING
DISINFECT
PUMP RUNNING TIME 10MIN
ON/OFF SCROLL
ON/OFF
ON
ON