Toshiba HWT-602S21SM3W-E(TR) Service Manual page 72

Item
7-2. The following shows the operation modes and controlled objects.
Operation Mode
Operation
and Control
mode
Method
Controlled
object
Heat pump
Backup
heater
2) Hot water supply operation
1) Operation start condition
When the [
following operation start condition is met, the operation starts.
• TTW < 38°C is detected.
2) Operation mode determination
An operation mode is determined according to the temperature
of TTW sensor.
• Heat pump operation selection *1
• When TTW < 38°C (a zone in the right figure) is met, the heat
pump operation is selected.
• Heater operation selection
When 52°C ≤ TTW < TSC_H (b zone in the right figure) is
met, the heater operation is selected.
• Thermostat status "OFF" selection
When TTW ≥ TSC_H is met, the thermostat status "OFF" is
selected.
3) Operation stop
The operation stops in the following cases.
• The remote controller gives a stop instruction.
• TTW ≥ TSC_H is met.
*1: When the outside temperature is -20 (-25) °C or below, the
heater operation is selected even if the TTW temperature falls
into "a zone".
*( ):801, 1101, 1401
Related DN
DN
1E
1F
20
21
24
25
*3: When the outside temperature is 0°C or below, the boil-up temperature will be higher that setting temperature in hot
water supply mode.
*4: When the hot water supply mode does not operate for certain period, to prevent water temperature drop, hot water
supply mode will operate even TTW is in c Zone, it's operation cycle is depend on DN_6AC setting (default 24H).
Operation flow and applicable data, etc.
Hot
Cooling Heating water
only only supply
only
O O O
× O O
] remote controller button is pressed and the
Setting item
Upper limit of hot water supply temperature
Lower limit of hot water supply temperature
Heat pump start temperature
Heat pump end temperature
Outside air correction start temperature for hot water supply*
Outside air correction temperature for hot water supply*
Heating and Hot water both operate
Heat pump select
Heat pump select
for hot water
for heating
supply
Hot
Heating water Heating
side supply side
side
O × ×
O × ×
(Temperature set with
Default
3
3
3 degree
71
Cooling and Hot water both operate
Heat pump select
for cooling
Hot Hot
water Cooling water
supply side supply
side side
O O ×
O × ×
TTW sensor
(Hot water cylinder unit)
TTW
TSC_H
Thermostat OFF
remote controller)
Heater operation
b Zone
HP_H OFF 52°C
HP_H ON 38°C
Heat pump
operation
TSC_H is hot water temperature
set with remote controller
Setting available range
65°C 60 - 65°C
40°C 40 - 60°C
38°C 20 - 45°C
52°C 40 - 65°C
0°C -20 - 10°C
0 - 15 degree
Heat pump select
for hot water
supply
Hot
Cooling water
side supply
side
× O
× O
O Possible
× Not possible
c Zone *4
a Zone