Hisense AHM-080FJFAA Operation Installation Maintenance Manual page 9

2.1 Inspection Prior to Startup
● Ensure that the pressure on the water pressure
gauge is above 0.1 MPa, the domestic water tank
is full of water and the tap water inlet valve is
opened.
● The outdoor unit, indoor unit and water module
must be energized. If not, the air conditioner
cannot start.
2.2 Precautions for Heat Recovery Running
● If a water tank is installed when cooling, the wire
controller is used to set 5.1.7 In-situ Settings E8")
heat recovery function as active, system will
automatically enter heat recovery running state.
Indoor unit refrigerates and uses the heat
produced during condensation to heat the hot
water in the domestic water tank. But when
there are only a few air conditioners for refriger-
ating, the recovered heat is few and the heating
capacity of the water tank might be insufficient.
The hot water heating capacity can be
increased by adding running indoor units or
closing all indoor units and starting the water
tank heating.
● For heat recovery during cooling, when the
water temperature rises in the water tank, the
refrigerating capacity of indoor units may be
decreased. If indoor units are kept from being
affected, the upper limit of temperature in heat
recovery can be set by 5.1.7 In-situ Settings
"J8") or set heat recovery function as inactive
(5.1.7 In-situ Settings "E8").
● If the seven-day timing sets the domestic water
tank heating, heat recovery function should be
set as inactive.
● For running in the refrigerating season, if heat
recovery function is set as active, the lowest
water temperature guarantee function of the
water tank 5.1.7 In-situ Settings "F2") is
recommended as inactive, because this may
save electricity fee.
2.3 Precautions for Floor Heating
● In order to prevent damage by too rapid temperature
rise, when the floor heating is first-time used, make
the floor drying, see details in 5.1.2.2. At this
moment, do not use indoor air conditioner for
heating.
● Because the thermal inertia of water is large, when
floor heating is started, room temperature may not
rise quickly due to different in-situ installation
conditions.
● When the outdoor environmental temperature is
very low, or the load in the room is large and the
electric heating of water module is set as active
(5.1.7 In-situ Settings "d1"), system will automatically
run and the electric heater of water module will
produce additional heat. At the moment, the unit
energy consumption will increase. If the energy
consumption is wished to be reduced, the electric
heating of water module may be set as inactive, but
the room temperature will not reach the set value.
2.4 Precautions for Domestic Hot Water Run
● Domestic hot water may be heated by heat pump
and electric heating. When water temperature in the
domestic water tank rises to a certain temperature,
electric heating is used for heating. In view of
electricity saving, the set temperature of domestic
hot water should not be too high, at most 55°C. This
can reduce the possibility of starting electric heating
and save electricity fee.
● Use of wire controller can shut down electric heating
for water tank (5.1.7 In-situ Settings "d8"), and
hence hot water is heated by the heat pump. The
electricity may be saved, but hot water heating will
take a longer time and the highest temperature the
water tank can be heated may be lower and possibly
not reach the set temperature.
● Quick heating can satisfy emergent use of domestic
hot water and reduce the heating time. However, if
indoor air conditioner is heating and user selects
quick heating, the unit heating takes precedence
over heating by indoor air conditioner. Therefore, for
quick heating, manually shut down indoor air
conditioner heating.
● Wire controller is used to set the lowest water
temperature guarantee function of water tank (5.1.7
In-situ Settings "E3" and "F2") and maintain the
water temperature in water tank above the set
lowest temperature (5.1.7 In-situ Settings "F5").
● Domestic water tank should be set pursuant to its
capacity. If the capacity of water storage tank is
large, it is necessary to prolong the seven-day set
time period or advance the starting time of electric
heating for water tank (5.1.7 In-situ Settings "J7").
● If the seven-day timing is set for domestic hot water,
do not use it when the air conditioner heating is being
used.
2.5 Precautions for simultaneous running
● If air conditioner heating simultaneously runs with
floor heating or domestic hot water, because the
outdoor unit has a fixed heating capacity, the
heating effect of air conditioner and water module
heating is not as good as heating solely by air
conditioner or by water module. Simultaneous
running is not recommended.
3