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12.19 Boiler Bivalent Control
- Boiler is an additional or alternative heat source to heat up the room when necessary.
- Purpose of this control is to turn ON and turn OFF the Boiler output signal when boiler heating capacity
- Purpose of this control is to turn ON and turn OFF the Boiler output signal when boiler heating capacity
needed in the system.
- Boiler is possible to connect to DHW Tank and Buffer Tank depends on the installer.
- Boiler operation parameter need to be set on Boiler itself, indoor do not control the boiler operation direction
- Boiler operation parameter need to be set on Boiler itself, indoor do not control the boiler operation direction
and operation.
- There are Alternative mode, Parallel mode, & Advance Parallel mode available to select by installer to fit to
the total system.
Bivalent control selection by remote controller
Remote control setting value:
1) Outdoor Ambient Set = (Range: -15°C ~ 15°C)
a) Alternative
Mode
- Only one heat source operates at one time, either heat pump or boiler depends on condition.
Control detail:
During Operation ON at Heat mode or Tank mode or Heat + Tank Mode
- Boiler signal turn ON and heat pump and water pump turn OFF when:
During Operation ON at Heat mode or Tank mode or Heat + Tank Mode
- Boiler signal turn ON and heat pump and water pump turn OFF when:
a. Outdoor ambient < Outdoor Ambient Set AND
b. Boiler prohibit flag = 0
b. Boiler prohibit flag = 0
** However indoor water pump can operate when Anti-freeze control condition fulfilled.
- Boiler signal turn OFF and heat pump and water pump turn ON when:
a. Outdoor ambient > Outdoor Ambient Set + [2°C] OR
b. Boiler prohibit flag = 1
b. Boiler prohibit flag = 1
b) Parallel
Mode
- Parallel mode allows heat pump and boiler ON at the same time. Boiler operates as an additional heating
capacity when low heat pump capacity at low ambient condition.
Control detail:
During operation ON at Heat mode or Tank mode or Heat + Tank mode
- Boiler signal turns ON when:
During operation ON at Heat mode or Tank mode or Heat + Tank mode
- Boiler signal turns ON when:
a. Outdoor ambient < Outdoor Ambient Set AND
b. Boiler prohibit flag = 0
b. Boiler prohibit flag = 0
- Boiler signal turns OFF when:
a. Outdoor ambient > Outdoor Ambient Set + [2°C] OR
b. Boiler prohibit flag = 1
b. Boiler prohibit flag = 1
c) Advance Parallel Mode
- Advance parallel mode allow heat pump to operate and turn ON boiler only when ambient and temperature
condition is fulfilled.
Remote control setting value:
1) Outdoor Ambient Set = (Range : -15°C ~ 15°C)
2) Selection of boiler connection direction. (Heat only, DHW only, Heat & DHW)
3) Setting data under Heat Direction
1) Outdoor Ambient Set = (Range : -15°C ~ 15°C)
2) Selection of boiler connection direction. (Heat only, DHW only, Heat & DHW)
3) Setting data under Heat Direction
a. Start Temperature
| START_TEMP |
b. Start Delay Timer
| START_TIMER |
c. Stop Temperature
| STOP_TEMP |
d. Stop Delay Timer
| STOP_TIMER |
4) Setting data under DHW Direction
a. Delay Timer
| DELAY_TIMER |
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