Panasonic WH-SXC09H3E8 Service Manual page 105

12.1.6 Target Zone Water Temperature Control
Purpose:- To control zone mixing and zone pump according to the zone sensor temperature
12.1.6.1 Target Zone 1 water temperature setting control

Start condition
Heating zone 1 is ON by remote control or Timer or Auto Mode OR
-
Cooling zone 1 is ON by remote control or Timer or Auto Mode.
-

Cancel condition
Heating zone 1 is OFF by remote control or Timer or Auto mode AND
-
Cooling zone 1 is OFF by remote control or Timer or Auto mode.
-

Target Zone 1 water temperature is calculated as below condition.
Target Zone 1 water temperature = A (Base temperature) + B (shift temperature)
-
A (Base Temperature)
* During heat mode and compensation select, if powerful mode is activated, higher value of WLo or WHi will be use
as curve value.
B (shift temperature) value is depend on the room sensor selection at remote controller as below table:
-
B (Shift Temp.)
Water temperature
External Room Thermostat
Internal Room Thermostat
&
Room Thermistor
Pool Function Selected
*B = 0 regardless of which sensor selection, if SHP control bit is enable except Pool function select (maintain Pool "B"
value)
** Pool function also can be select at Zone 1 when optional PCB is connected and Zone 1 system is select.

Maximum/minimum regulation of Target Water Temperature.
* Between outdoor ambient -10°C and -15°C, max target decreases gradually from 60°C to 55°C.

Target Zone 1 Water Temperature (Heat mode only) during SG ready control
If buffer tank selection is "NO" then following shift is carried out.
-
While digital input is "10" or "11" then,
o
Final Target Zone 1 water temperature
= Target Zone 1 water temperature* (SG ready % setting (remote control menu))%
If buffer tank selection is "YES"
-
No shift of Target Zone 1 Water Temperature. Target Buffer Tank Temperature will change accordingly.
o
* Refer to "Buffer tank temperature control"
Compensation
Value from the curve + User shift value set
B shift value is depend on the room sensor selection at remocon as table below
B = 0
B = 0
Cool Mode:
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = 1 * (room set temp. (R/C) – actual room temp.)
Max/Min Regulation of B: (Max: 5°C ; Min: -5°C)
Heat Mode:
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = follow Heating PI control contents
B = Delta value setting from remocon
55°C (Below Ambient -15°C) *
Max
60°C (Below Ambient -10°C) *
Min
Sensor Selection
Heating
20°C
105
Direct
Direct value from user setting
Cooling
20°C
5°C