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7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
7
(9) Setting Frequency of Output to Internal Heater (function code 33 to 34)
• The increase/decrease time is used to set the response time.
(10)Setting Night Setback (function code 26. remote controller function code 0F to 11)
• Set the function when the NIGHT button on the remote controller is pressed.
• Set enabling/disabling of this function, reduction temperature, start time, and end time.
• If disabling is set, the night setback operation is not performed even when the NIGHT button is
pressed.
(11)Setting 2-Way Valve (for Cooling) Operation (function code 3C)
• When using both cooling and heating operations and there is an indoor unit only for heating (such as floor
heating), install the 2-way valve and set this function code.
(12)Setting 3-Way Valve Operation (function code 54)
• This setting is not necessary for normal installation. Make this setting to invert the logic circuit in case ports
A and B of the 3-way valve are wrongly attached and it cannot be rectified on site.
(13)Mixing valve types and setting
• Set the time period from full close to full open of the 2-zone control mixing valve. Set a value that is 1/10 of
the actual time.
(14)Setting Heating/Hot Water Switching when Boiler Is Used (function code 3E)
• When boiler is used, make this setting to operate the Hydro Unit by the instruction from the boiler.
(15)Setting Heat Pump Operating Time for Hot Water Supply Operation
• Set the time period from the start of heat pump run to the start of heater energization at the beginning of hot
water supply operation. If a long period is set, it takes long time for heating water.
(16)Setting Cooling ON/OFF
• Set this function when performing cooling operation.
(17)Remote controller time indication
• 24-hour or 12-hour notation is selected for the timer.
(18)Setting Nighttime Quiet Operation
• Issue an instruction for low-noise mode operation to the outdoor unit. Enabling/disabling of this function, start
time, and end time can be set.
(19)Setting Alarm Tone
• The remote controller alarm tone can be set.
34-EN
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