Fujitsu Waterstage WOYK150LJL, Руководство по установке

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Operating principle
The heat pump transmits the energy contained in the
surrounding air into the dwelling to be heated.
The heat pump consists of four main elements, in which
a refrigerant (R410A) circulates.
-In the evaporator (ref. 13 , fig. 8, page 12 ):
The calories are taken from the outside air and
transmitted to the refrigerant. Because it has a low
boiling point, it changes from a liquid to a vapour, even
in cold weather (down to -25°C outside temperature).
-In the compressor (ref. 10 , fig. 8, page 12 ):
The vaporised refrigerant is pressurised and takes on
even more calories.
-In the condenser (ref. 14 , fig. 9, page 13 ):
The energy of the refrigerant is transmitted to the
heating circuit. The refrigerant returns to its liquid state.
-In the expansion valve (ref. 9 , fig. 8, page 12 ):
The liquefied refrigerant is returned to a low pressure
and regains its initial temperature and pressure.
The heat pump is equipped with a controller which
controls the room temperature based on the outdoor
temperature measurement. The room thermostat
(option) provides a corrective action for the temperature
control.
The hydraulic unit is fitted with an electrical backup or
boiler connection which intervenes to provide additional
heat during the coldest periods.
• Control functions
- The heating circuit's flow temperature is controlled by
the temperature control.
- Depending on the heating flow temperature,
the outdoor unit's power is modulated by the "Inverter"
compressor.
-Control of the backup electrical heating.
-The daily timer program is used to set the periods
where the ambient temperature is comfortable or
reduced.
-Summer/winter time mode switchover is automatic.
-Management of the boiler backup*.
-Room sensor*: The room sensor provides a corrective
action for the temperature control.
-Control of a second heating circuit*.
-Domestic hot water*: Heating timer program.
-Managing cooling*.
* Where the heat pump is fitted with options and associated kits.
• Protective functions
-Anti-legionella cycle for domestic hot water.
-Frost protection: Frost protection cuts in if the heating
circuit's flow temperature falls below 5°C (provided
that the heat pump's electrical power supply is not
interrupted).
8
7
6
5
4
3
2
1
0
-20 -15 -10 -5 0 5 10 15 20 25
46
Dwelling heat loss (kW)
Outdoor temperature (°C)
Outdoor temperature (°C)
HP power
fig. 10 - Examples and operating limits
Max
authorised HP
start-up temp.
W
ater return temperature (°C)
HP only
Heat Pump
HP +
electrical
backup
Backup
Waterstage / Installation / 2011 - EN