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Hydro Unit
Installation Manual
Main setting items
(1) Setting Hot Water Temperature Range (function code 18 to 1F)
• Set the temperature range for heating (zone 1, zone 2), cooling, and hot water.
• The upper-limit and lower-limit temperatures of each mode can be set.
(2) Setting Heat Pump Operation Conditions for Hot Water Supply (function code 20 and 21)
• Set the heat pump start water temperature and heat pump stop water temperature.
• The heat pump starts working when the water temperature lowers below the set start water temperature. It
is recommended that the default value be used.
(3) Compensating Hot Water Temperature (function code 24 and 25)
• Compensate the target temperature from the remote controller set temperature when the hot water
temperature lowers below the set outside air temperature.
(4) Setting Hot Water Boost (function code 08 and 09)
• Set the control time and target temperature when the HOT WATER BOOST
button on the remote
controller is pressed.
(5) Setting Anti-Bacteria
• Set the control for the hot water cylinder when ANTI BACTERIA
is set with the remote controller.
• Set the target temperature, control period, start time (24-hour notation), and target temperature retention
period.
• Make this control setting according to regulations and rules of respective countries.
(6) Setting Priority Mode Temperature
• Set the outside air temperature that changes the preferred operation mode.
• Hot Water - Heating Switching Temperature
Heating operation takes precedence when the temperature lowers the set temperature.
• Boiler HP Switching Temperature
When the temperature lowers the set temperature, the HP operation stops and the external boiler output is
made.
(7) Setting Heating Auto Mode Temperature (function code 27 to 31)
• Compensate the target temperature when Auto is set for temperature setting on the remote controller.
• The outside air temperature can be set to one of three points (T1 and T3) within a range of -15 to 15°C.
• The target temperature can be set to a value from 20 to 55°C.
• However, A > B > C > D > E.
• The entire curve can be adjusted plus and minus 5°C by function code 27.
(8) Setting Frost Protection Temperature (function code 3A to 3B)
• Set the function when the FROST PROTECTION
button on the remote controller is pressed.
• Set enabling/disabling of this function and the target water temperature.
• If disabling is set, the frost protection operation is not performed even when the FROST PROTECTION
button is pressed.
(-10)
0
(10)
T1
T2
T3
20
-20
A
B
C
D
E
(40)
(35)
(30)
(25)
(20)
▼
Fig. 8-02
Outdoor Temperature
33-EN
Summary of Contents for ESTIA HWS-1402XWHM3-E
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