68
Figure (under) illustrates the operation of the
heat pump and immersion heater in DHW mode.
If the temperature of the DHW storage tank (T5)
is lower than T5stop - dT5_ON, then the heat
pump is activated in DHW mode.
In the event that, after the time t_TBH_delay has
elapsed, the T5 has not yet reached T5stop, the
TBH lights up.
Once T5 reaches T5stop the heat pump stops
and TBH continues to operate until T5 reaches
T5S + dT5_TBH_OFF.
Note: When T5S> T5stop, the operation is the
same, but the heat pump bases its logics on T5S
instead of on T5stop..
Time
Compressor
T5: DHW tank water temperature
T5S: DHW set temperature
T5stop: Maximum temperature that can be reached in the DHW
storage tank, in heat pump only.
TBH: Immersion heater in DHW tank
DHW mode operation
TT44DDHHW
WM
MAAXX sets the outside temperature above
which the heat pump will not operate in DHW
mode.
TT44DDHHW
WM
MAAXX is the maximum outside temperature
that the heat pump can operate at for domestic
water heating. The unit will not operate if the
outside temperature goes above it in DHW mode.
The highest value that TT44DDHHW
WM
MAAXX can take is
43°C, which is the DHW mode upper outside
temperature operating limit of the heat pump.
TT44DDHHW
WM
MIINN sets the outside temperature below
which the heat pump will not operate in DHW
mode.
TT44DDHHW
WM
MIINN is the minimum outside temperature
that the heat pump can operate for domestic
water heating.
The lowest value that TT44DDHHW
WM
MIINN can take is -
25°C, which is the DHW mode lower outside
temperature operating limit of the heat pump.
The heat pump will turn off if the outside
temperature drops below it in water heating
mode. The relationship between operation of the
unit and outside temperature can be illustrated
in the picture below:
TT__IINNTTEERRVVAALL__DDHHW
W is the start time interval of the
compressor in DHW mode. When the compressor
stops running, the next time the compressor
turns on it should be TT__IINNTTEERRVVAALL__DDHHW
W plus one
minute later at least.
ddTT55__TTBBHH__O
OFFFF sets the temperature range at
which the electrical resistance (TBH), if activated
by the machine logic, takes the storage tank
beyond the setpoint temperature (T5S). When T5>
Min (T5S + dT5_TBH_OFF, 65 ° C) the electrical
resistance switches off.
TT44__TTBBHH__O
ONN is the temperature only when the
outside temperature is lower than its parameter
and the booster heater will be available..
tt__TTBBHH__ DDEELLAAYY is the time that the compressor
has run before starting the booster heater (if T5
＜
min (T5S,T5stop).
TT55SS__DDIISSIINNFFEECCTT is the target temperature of water
in the domestic hot water tank in the DISINFECT
function.
The maximum temperature that can be set is 70°
C.
tt__DDII__HHIIGGHHTTEEM
MPP establishes the minimum duration
in which T5> = T5S_DI;
tt__DDII__M
MAAXX defines the maximum duration of
disinfection.
The change of domestic water temperature is
described in the picture below:
HP: Heat pump
TBH: DWH tank immersion heater
T5: DHW tank water temperature
T5S: DHW set temperature
T4DHWMIN
tt__DDHHW
WHHPP__RREESSTTRRIICCTT RREESSTTRRIICCTT parameter that is
enabled if activated 1.5 DHW PRIORITY TIME SET.
Sets the maximum length of time that the heat
pump will run in space heating or space cooling
modes before switching to DHW mode, if a
requirement for DHW mode exists. When running
in space heating mode or space cooling mode,
the heat pump becomes available for DHW mode
either as soon the space heating/cooling set
temperatures have been reached (refer to
“
COOL
MODE SETTING Menu
”
and
“
HEAT MODE SETTING
Menu
”)
or after t_DHWHP_MAX minutes have
elapsed.
tt__DDHHW
WHHPP__M
MAAXX parameter that is enabled if
activated 1.5 DHW PRIORITY TIME SET.
sets the maximum length of time that the heat
pump will run in DWH mode before switching to
space heating mode or space cooling mode if a
requirement for space heating/cooling modes
exists. When running in DHW mode, the heat
pump becomes available for space heating/
cooling either as soon as the DHW tank water
temperature (T5) reaches the DHW set
temperature (T5S) or after tt__DDHHW
WHHPP__M
MAAXX minutes
have elapsed.
Figure illustrates the effects of t_DHWHP_MAX and
t_DHWHP_RESTRICT when DHW PRIORITY is
enabled. The heat pump initially runs in DWH
mode. After t_DHWHP_MAX minutes, T5 has not
reached
Operation in DHW PRIORITY
T5: DHW tank water temperature
T5S: DHW set temperature
T5stop: DHW mode leaving water temperature operating limit
PPU
UM
MPP__DD TTIIM
MEERR sets whether or not the user is able
to set the recirculation pump in DHW mode. For
installations with a recirculation pump, select ON
so that the user is able to set pump start times.
PPU
UM
MPP
__
DD RRU
UNNNNIINNGG TTIIM
MEE sets the length of time the
pump runs for at each of the user
‐
specified start
times on the DHW PUMP tab on the DOMESTIC
HOT WATER (DHW) menu, if TIMER RUNNING is
enabled.
PPU
UM
MPP
__
DD DDIISSIINNFFEECCTT RRU
UNN sets wether or not the
recirculation pump (field supply) operates during the
disinfection mode. To be activated with additional
DHW tank.
DDHHW
W FFU
UNNCCTTIIO
ONN:: Parameter enabled when 1.4 DHW
PUMP is activated.
Da attivare con presenza di accumulo ACS
aggiuntivo.
tt__AANNTTIILLO
OCCKK: Defines the opening period of the
valves for the automatic ANTILOCK function
(activation of the valves if they remain in the OFF
position for more than 24 hours).
After the set time has elapsed, the valve is
deactivated.
M
Meennuu CCO
OO
OLLIINNGG M
MO
ODDEE SSEETTTTIINNGG
M
MEENNU
U >> FFO
ORR SSEERRVVIICCEEM
MAANN >> CCO
OO
OLL M
MO
ODDEE SSEETTTTIINNGG
TT55
t_DHWHP_max t_DHWHP_restrict
StaRt - up
