53
7-1.
Basic
Operation
2) Hot water supply operation Hot water supply operation
1. Purpose
Hot water supply
2. Details
This section performs
hot water supply
operation according to
heating conditions
specified for the steps
on the left.
3. Operations
1) By pressing the [ ]
button on the remote
controller, the hydro
unit controller starts to
transmit a hot water
supply operation signal
to the outdoor unit.
2) The hydro unit
performs the operation
controls shown on the
left while also
controlling the
circulation pump, hot
water cylinder heater
“3WV”.
3) The outdoor unit
controls the
compressor, outdoor
fan motor, electric
expansion valve, and
4-way valve based on
the operation signals
transmitted by the
hydro unit.
3) Heating operation Heating operation
1. Purpose
Heating
2. Details
This section performs
heating operation
according to heating
conditions specified for
the steps on the left.
3. Operations
1) By pressing the [ ]
button on the remote
controller, the hydro
unit controller starts to
transmit a heating
operation signal to the
outdoor unit.
2) The hydro unit
performs the operation
controls shown on the
left while also
controlling the
circulation pump,
backup booster heater
“ON/OFF”, water 2-
way valve, and water 3-
way valve.
3) The outdoor unit
controls the
compressor, outdoor
fan motor, electric
expansion valve, and
4-way valve based on
the operation signals
transmitted by the
hydro unit.
Item Operation flow and applicable data, etc. Operation description
Hydro unit
control
Circulation pump "ON/OFF" control
Water 3-way valve control
Hot water cylinder heater control
Hot water temperature: 40°C to 75°C
Number of compressor revolutions control
Number of outdoor fan motor revolutions control
Pulse motor valve control
4-way valve control
Outdoor unit
control
Operation instruction
signal transmit
Hot water supply
operation start
Hydro unit
control
Circulation pump "ON/OFF" control
Water 3-way valve control
Water 2-way valve control
Mixing Valve control
Backup heater control
Booster heater control
Heating temperature: 20°C to 55 (65) °C
* ( ): 801, 1101
Number of compressor revolutions control
Number of outdoor fan motor revolutions control
Pulse motor valve control
4-way valve control
Outdoor unit
control
Operation instruction
signal transmit
Heating operation
start
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