Toshiba ESTIA HWS-1102H-E, Service Manual

Page: 40 / 168

39
Toshiba
Item Operation flow and applicable data, etc.
8-2.
Operation
Mode and
Control Method
The following shows the operation modes and controlled objects.
O Possible
×
Not possible
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 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°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
*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
mode
Controlled
object
Cooling
only
Heating
only
Hot
water
supply
only
Heating and Hot water Cooling and Hot water
Heat pump select
for heating
Heat pump select
for hot water
supply
Heat pump select
for cooling
Heat pump select
for hot water
supply
Heating
side
Hot
water
supply
side
Heating
side
Hot
water
supply
side
Cooling
side
Hot
water
supply
side
Cooling
side
Hot
water
supply
side
Heat pump O O O O × × O O × × O
Backup
heater
× O × O × × × × × × ×
Hot water
cylinder
heater
× × O × O × O × O × O
(Hot water cylinder unit)
TTW sensor
TTW
HP_H OFF 45°C
HP_H ON 38°C
TSC_H
(Temperature set with
remote controller)
Thermostat OFF c Zone
a Zone
Heater operation
b Zone
Heat pump
operation
TSC_H is hot water temperature
set with remote controller
FC No. Setting item Default Setting available range
1E Upper limit of hot water supply temperature 75°C 60-80°C
1F Lower limit of hot water supply temperature 40°C 40-60°C
20 Heat pump start temperature 38°C 20-45°C
21 Heat pump end temperature 45°C 40-50°C
24 Outside air correction start temperature for hot water supply*
3
0°C -20-10°C
25 Outside air correction temperature for hot water supply*
3
3 deg 0 -15 deg
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 39 Monday, October 5, 2009 2:09 PM