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Toshiba
8-2.
Operation
Mode and
Control Method
5)Simultaneous operations of "hot water supply" and "cooling"
For simultaneous operations of "hot water supply" and "cooling", basically cooling runs by a heat pump operation, and
hot water supply by a heater operation.
* 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.
When TTW 45°C (FC: changeable) is met, the operation returns to the normal mode.
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.
*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
Item Operation flow and applicable data, etc.
Hot water supply side Cooling side
Normal Heater * Heat pump *
Hot water supply side Cooling side
Cooling
thermostat off
10 min. passed
Heat pump Stop
E
I zone
J zone
Heat pump
operation
Heat pump
boiler operation
TO
FC No. Setting item Default Setting available range
23 Heat pump only / Simultaneous operation switching TO
temperature (E)
-10 -20-20°C
3E Hydro unit setting / Boiler set temperature priority switching 0:Priority on
hydro unit
setting
1: Priority on boiler setting
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 42 Monday, October 5, 2009 2:09 PM