Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 30

(1) Setting procedures
Set the dip switches on the circuit board as follows before making the settings for the items described in this section.
Step 0 Set SWS1 to OFF from the remote controller or with the local switch.
Most settings (other than item codes 11 and 13 (water temperature setting)) cannot be
Set the ON/OFF
changed unless the ON/OFF setting is set to OFF. *
switch (SWS1) to
OFF.
Step 1
Set the dip switches
SW5 and SW6.
Step 2 Item codes 11, 13, 22, 23, 24, and 25 relate to water-temperature setting.
Press the push switch SWP3 to select an item code.
Select the desired
Press the push switches SWP1 and SWP2 to change the value of the selected item.
item with the push
The value will keep blinking while it is being changed.
switch SWP3.
Step 3 Settings table
Press the push
switches SWP1 (↑)
or SWP2 (↓) to
increase or
decrease the value.
* The graph below shows the relationship between C1/C3 and C2/C4.
Step 4 Press SWP3 once within one minute of changing the setting with SWP1 or SWP2 to save the
setting.
Press the push
Once the new setting is saved, the display will stop blinking and stay lit. The display will, then,
switch SWP3 to
return to the item code display mode.
save the change.
If SWP3 is not pressed within one minute, the change will not be saved and the display will
return to the item code display mode.
* Settings can be changed from the optional remote controller, regardless of the ON/OFF status of the operation switch.
SW5
10 5 6 7
OFF OFF OFF OFF
Items that can be set
Water temp. setting A
(Heating mode)
Water temp. setting B
(Hot water mode)
Heating ECO mode/
Water temp. setting C1 *1
Heating ECO mode/
Outside temp. setting C2 *1
Heating ECO mode/
Water temp. setting C3 *1
Heating ECO mode/
Outside temp. setting C4 *1
Water temp.
setting
Heating ECO
Water temp.
setting C1
Heating ECO
Water temp.
setting C3
Heating ECO
Outside temp.
setting C2
*1 These items need not be set when only a single water temperature setting is used.
When a signal through a dry contact is used to switch between the three modes, the water temperature setting is selected as
shown in the table below.
* The setting ranges for the water temperature setting A, B, C1, and C3 are shown in the table below.
Water-temperature control
Outlet-water-temperature-based control
Inlet-water-temperature-based control
* When the outside temperature is -5ºC or below and the water temperature is set as follows, the unit may operate at a higher
preset temperature than the preset temperature: Outlet temperature 35ºC/Inlet temperature 30ºC.
SW6
8 9 10
OFF ON OFF
Item Initial
Unit
code value
Increments
11 45 °C
13 65 °C
22 34 °C
23 -7 °C
24 24 °C
25 12 °C
Outside temp.
Heating ECO
Outside temp.
setting C4
Lower limit
24.0°C
24.0°C
30
Setting
Setting change from an
Lower Upper
limit limit
0.1°C 24 70
0.1°C 24 70
0.1°C 24 70
0.1°C -20 50
0.1°C 24 70
0.1°C -20 50
* When the values for C2 and C4
are set to the same value.
Water temp.
setting
Heating ECO
Water temp.
setting C1
Heating ECO
Water temp.
setting C3
Upper limit
70.0°C
65.0°C
optional remote
controller
Possible
Possible
Not possible
Not possible
Not possible
Not possible
Outside temp.