Heating Auto On/Off - Hisense Hi-Therma Series Service Handbook

(1) Thermo ON/OFF by combination of room thermostats and request of water outlet temperature on Water Cycle 1 and
Water Cycle 2 when [ Off_mode(heating) ] is set as [ON] and room thermostats is available.
In this situation, Water Cycle (Cycle 1 or Cycle 2) can also operate by combination of request of water outlet temperature
and Room thermostats, that means Space heating will be Thermo ON by request of water outlet temperature or Room
thermostats. Oppositely the Water Cycle will be Thermo OFF when request of water outlet temperature and Room
thermostats Thermo ON all disappear.
● Space heating is Thermo ON
Room thermostats in situation (1) or Request of water outlet temperature in situation (2) Thermo ON.
● Space heating is Thermo OFF
Room thermostats in situation (1) and Request of water outlet temperature in situation (2) all Thermo OFF.
NOTE:
1. [Tow]:Measured outlet water temperature
[Tiw]:Measured inlet water temperature
[Ttwo_Cycle 1 ]: heating Water Cycle1 Target outlet water temperature refers to 10.2.2.1.
[Ttwo_Cycle 2]: heating Water Cycle2 Target outlet water temperature refers to 10.2.2.1.
2. Space heating can be Thermo ON only when measured outlet water temperature [Tow] is lower than Tmax.
3. Space heating will be forced Thermo OFF when measured outlet water temperature [Tow] is more than [Tmax + 3°C].
4. Tmax is Maximum outlet water temperature related outdoor ambient temperature that Heat pump can reach.
5. Water Cycle and room thermostats have following operation interaction
① If any one of room thermostats on the specific Water Cycle (Cycle 1 or Cycle 2) is Switch ON, then the corresponding
Water Cycle will be Switch ON.
② If the specific Water Cycle (Cycle 1 or Cycle 2) is Switch OFF, then all of room thermostats on the corresponding Water
Cycle will be forced Switch OFF.
③ If all of room thermostats on the specific Water Cycle (Cycle 1 or Cycle 2) is Switch OFF and [Off mode(heating) ] is set
as [OFF], then the corresponding Water Cycle will be forced Switch OFF in heating mode.

10.2.2.4 Heating Auto ON/OFF

When outside temperature rises, it is not necessary to keep the heat pump in heating mode. The system switches the heat
to OFF when the average outdoor temperature of 24 hours rises above the Switch-OFF Temperature.
The configuration of this option should be done through the master controller.
Configuration → Space heating →Heating Auto ON/OFF.
Mark
Auto Heat Status
Heating Auto temperature
[Status] of [Auto Heat] can also be set through the master controller [favourite] button.
Mark
[favourite] button Auto Heat
Function:
① Space heating will be forced Thermo OFF when [Status] of [Auto Heat] is enabled and the average outdoor temperature
of 24 hours is more than [Heating Auto temperature] + 1°C.
② Forced Thermo OFF will be canceled when [Status] of [Auto Heat] is disabled Or the average outdoor temperature of 24
hours is lower than [Heating Auto temperature] - 1°C.
Average Outdoor Ambient Temperature
Description Default Value
Disabled
Description Default Value
Range
Disabled /Enabled
24 18-26
Range
OFF OFF/ON
229
Control function
Steps Units
- -
1 °C
Steps Units
- -