Boiler Bivalent Control - Panasonic WH-SXC09H3E8 Service Manual

12.19 Boiler Bivalent Control

Boiler is an additional or alternative heat source to heat up the room when necessary.
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Purpose of this control is to turn ON and turn OFF the Boiler output signal when boiler heating capacity
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needed in the system.
Boiler is possible to connect to DHW Tank and Buffer Tank depends on the installer.
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Boiler operation parameter need to be set on Boiler itself, indoor do not control the boiler operation direction
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and operation.
There are Alternative mode, Parallel mode, & Advance Parallel mode available to select by installer to fit to
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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.
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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:
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a. Outdoor ambient < Outdoor Ambient Set AND
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:
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a. Outdoor ambient > Outdoor Ambient Set + [2°C] OR
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
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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:
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a. Outdoor ambient < Outdoor Ambient Set AND
b. Boiler prohibit flag = 0
Boiler signal turns OFF when:
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a. Outdoor ambient > Outdoor Ambient Set + [2°C] OR
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
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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
a. Start Temperature
b. Start Delay Timer
c. Stop Temperature
d. Stop Delay Timer
4) Setting data under DHW Direction
a. Delay Timer
| START_TEMP |
| START_TIMER |
| STOP_TEMP |
| STOP_TIMER |
| DELAY_TIMER |
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