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3.USEAGE
-61-
A3 0
Cooling Circulation Pump Control
Type
A2
0
Heating Circulation Pump Control
Type
A1
0
0 (controlled by unit), 1 -15
(
ON for set time
,
in
minutes
), 16(
always ON
)
0 (controlled by unit), 1 -15
(
ON for set time
,
in
minutes
), 16(
always ON
)
0 (controlled by unit), 1 -15
(
ON for set time
,
in
minutes
), 16(
always ON
)
Unit Circulation Pump Control Type
Parameter No.
Meaning
Range
Default Value
These three parameters are designed for manual turn ON the pump during installation or service work. When the
parameter is set to any value other than 0, the correspondent pump will start to work immediately, and stop automatically
after set time is finished.
This can be used to check the statue of the circulation pump, or circulate the water for air purging purpose before unit starts.
Heating Operation Motorized 3-way
valve Direction
A9
1
0 (Same as Hot Water
Operation), 1(Same as
Cooling Operation)
A8
120
0 (Alway ON), 1 - 600(With
power for the set time, in
seconds)
Unit Motorized 3-way valve
Switching Time
A7
20
Cooling Cirulation Pump Stop
Temperature
Cooling Circulation Pump Start
Temperature
A6
18
5 - 20 (in
℃ )
5 - 20 (in
℃ )
A5
18
Heating Cirulation Pump Stop
Temperature
A4
20
20 - 50 (in
℃ )
18 - 50 (in
℃ )
Heating Circulation Pump Start
Temperature
Parameter No.
Meaning Range Default Value
Parameter No.
Meaning
Range Default Value
A4
20
20 - 50 (in
℃ )
Heating Circulation Pump Start
Temperature
Heating Cirulation Pump Stop
Temperature
A5
18
18 - 50 (in
℃ )
Cooling Circulation Pump Start
Temperature
18
5 - 20 (in
℃ )
A6
Cooling Cirulation Pump Stop
Temperature
A7
20
5 - 20 (in
℃ )
For heating operation, if water temperature is too low, it has no meaning to circulate this "cold" water into house heating
distribution system.
Thus when heating circulation pump is OFF, it will only start to work when water temperature is higher than set "Heating
Circulation Pump Start Temperature"
;
When heating circulation pump is working
,
it will stop if water
temperature is lower than set
"
Heating Cirulation Pump Stop Temperature
".
For cooling operation, if water temperature is too high, it has no meaning to circulate this "hot" water into house cooling
distribution system.
Thus when cooling circulation pump is OFF, it will only start to work when water temperature is low than set "Cooling
Circulation Pump Start Temperature
";
When cooling circulation pump is working
,
it will stop if water
temperature is higher than set
"
Cooling Cirulation Pump Stop Temperature
".