Toshiba HWS-802XWHM3-E, HWS-802XWHT6-E, HWS-802H-E Control at the time of heating heater operation

Item

Operation flow and applicable data, etc.

8-3.

2) Control at the time of heating heater operation

Hydro Unit

•

Controlled Object: Backup heater, Booster heater

Control

The backup heater control starts when 13 minutes has passed after the heating heat pump operation started.

The backup heater control increases, decreases, or maintains the number of heaters every 10 minutes (FC)

depending on the difference between the heating set temperature (TSC_F) and the heater outlet temperature

(THO). Note that when the heating set temperature (TSC_F) is reached, the unit stops energizing the heater.

THO

70

E zone

Abnormality detection

Diff : 2K

D zone

Heater off

TSC_F-0

Heater output down every

C zone

5, 10, 15, or 20 minutes

TSC_F-2

Diff : 2K

B zone

KEEP

TSC_F-4

Diff : 2K

A zone

Heater output up every

10, 20, 30, or 40 minutes

Status

Heater ON / OFF

Heater 1

Backup heater 3 kW = ON

Heater 2

Backup heater 9 kW = ON

Heater 3

Heater 2 + Booster heater

The single-phase model of 3 kW has the backup heater 1 only.

The three-phase model of 6 kW has heater 1+2 of 6 kW.

Contact point output only is available for booster heater.

Related FC

FC No.

Setting item

Default

Setting available range

20

Hot water supply heat pump start temperature

38°C

20-45°C

21

Hot water supply heat pump stop temperature

45°C

40-50°C

33

Heater control of down time

1:10 mins

0:5 mins

2:15 mins

3:20 mins

34

Heater control of up time

0:10 mins

1:20 mins

2:30 mins

3: 40 mins

2-3) Heater control at the time of defrosting

THO

• Object to be controlled: Backup heater

When a defrosting operation starts during the heating heat

TSC_F

pump operation, the unit energizes a backup heater (3 kW)

Heater off

TSC_F-β(β=2)

according to the heater outlet temperature sensor (THO) and

Heater 1

the set temperature (TSC_F) as follows.

TSC_F-α(α=4)

Heater 1

1)When the heater outlet temperature sensor (THO) drops to the temperature of 2°C below the set temperature

	Status	Heater ON / OFF
Defrosting ends according to the usual heater control.
	Heater 1	Backup heater 3 kW = ON

2-4) Forcible heater energization

To prevent freeze, the unit energizes or stops energizing a backup heater (3 kW) regardless of the unit status, not operated or in operation.

• Object to be controlled: Backup heater

1)Energization start condition: TWO < 4 or TWI < 4 or THO < 4

2)Energization stop condition: TWO 5 and TWI 5 and THO 5 Defrosting ends according to the usual heater control.

2-5) No heater operation

According to the DP_SW11 setting, the unit switches the energize/ not energize for the hot water cylinder, backup heater, and booster. For details, see 10-1.

51