Simultaneous Operations Of "Hot Water Supply" And "Cooling"; Boiler-Assisted Heating Operation - Toshiba HWS-802XWHM3-E Service Manual

Item
8-2.

5) Simultaneous operations of "hot water supply" and "cooling"

Operation
For simultaneous operations of "hot water supply" and "cooling", basically cooling runs by a heat pump operation, and
Mode and
hot water supply by a heater operation.
Control Method
Normal
* Note that after a "cooling" heat pump operation is selected, if the thermostat off status continues for 10 minutes and
TTW < 38°C is met, the operation switches to a hot water supply operation.
Cooling
thermostat off
10 min. passed
When TTW

6) Boiler-assisted heating operation

This operation is enabled when DPSW13_2 is ON (A boiler exists).
• I zone Heat pump operation
A heat pump operation is usually performed.
• J zone Heat pump operation + Boiler operation *1
A heat pump + boiler operations (*2) are performed, and a heater operation is performed in the Hot water supply side.
TO
Heat pump
operation
E
Heat pump
boiler operation
*1: In J zone, the hydro unit setting has a priority, and when the set temperature is reached, the boiler output also becomes
OFF.
Setting FC_3E to "1" makes the boiler has a priority, and even if the hydro unit set temperature is reached, the boiler
output remains "ON".
*2: The boiler operation only gives boiler instruction from the hydro unit through the option board.
Related FC
FC No.
23
3E
Operation flow and applicable data, etc.
Hot water supply side
Heater *
Hot water supply side
Heat pump
45°C (FC: changeable) is met, the operation returns to the normal mode.
I zone
J zone
Setting item
Heat pump only / Simultaneous operation switching TO
temperature (E)
Hydro unit setting / Boiler set temperature priority switching
Cooling side
Heat pump *
Cooling side
Stop
Default
-10
0: Priority on
hydro unit
setting
42
Setting available range
-20-20°C
1: Priority on boiler setting