Toshiba HWS-802XWHM3-E Service Manual page 40

Item
8-2. The following shows the operation modes and controlled objects.
Operation
Operation
Mode and
mode
Control Method
Controlled
object
Heat pump
Backup
heater
Hot water
cylinder
heater
1) Hot water supply operation
1) Operation start condition
When the [HOT WATER] remote controller button is pressed and
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 *2
• When TTW < 38°C (a zone in the right figure) is met, the heat
pump operation is selected.
• Heater operation selection
When 45°C
met, the heater operation is selected.
• Thermostat status "OFF" selection
When TTW
selected.
3) Operation stop
The operation stops in the following cases.
• The remote controller gives a stop instruction.
• TTW
*1: When the outside temperature is -20°C or below, the heater
operation is selected even if the TTW temperature falls into "a
zone".
*2: When "Hot water supply" and "Heating" are simultaneously in
operation, the heater operation may be selected depending on
the outside air temperature.
Related FC
FC No.
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.
Operation flow and applicable data, etc.
Hot
Cooling Heating water
only only supply
only
O O O
× O ×
× × O
TTW < TSC_H (b zone in the right figure) is
TSC_H is met, the thermostat status "OFF" is
TSC_H is met.
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
Heat pump select
Heat pump select
for hot water
for heating
supply
Hot
Heating water Heating
side supply side
side
O × ×
O × ×
× O ×
(Temperature set with
HP_H OFF 45°C
Default
75°C
40°C
38°C
45°C
3
0°C
3
3 deg
39
Cooling and Hot water
Heat pump select
Heat pump select
for cooling
Hot Hot
water Cooling water Cooling
supply side supply
side side
O O ×
× × ×
O × O
TTW sensor
(Hot water cylinder unit)
TTW
TSC_H
Thermostat OFF c Zone
remote controller)
Heater operation
b Zone
HP_H ON 38°C
Heat pump
operation
TSC_H is hot water temperature
set with remote controller
Setting available range
60-80°C
40-60°C
20-45°C
40-50°C
-20-10°C
0 -15 deg
for hot water
supply
Hot
water
side supply
side
× O
× ×
× O
O Possible
×
Not possible
a Zone