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12.17.2 Solar Operation Control
Solar function can only be activate if the solar function selection “YES” from remote control. To achieve hot water
from solar panel, indoor need to control the solar pump and circulate hot water from solar panel.
Under normal case:
o Solar pump start condition:
o Solar pump start condition:
Solar panel temperature > Delta T turn on setting temp (R/C) + Tank temperature (depend on selection,
DHW or Buffer) AND
Tank temperature (DHW or Buffer) < Solar HI Limit Temp (R/C) AND
Operation ON with heat mode (apply to solar connect to "Buffer Tank" case)
* Condition c) ignore if the solar system is connect to DHW tank (control active under operation OFF time for
Tank connection case)
Tank connection case)
o Solar pump stop condition:
Solar panel temperature < Delta T turn OFF setting temp (R/C) + Tank temperature (depend on selection,
DHW or Buffer) OR
Tank hot water temp >= Solar HI Limit Temp (R/C) + [2]°C
Under solar Anti-freeze protection control:
o Solar pump start condition:
Outdoor temp < Outdoor temp setting for Anti-Freeze (R/C)
o Solar pump stop condition:
Outdoor temp > Outdoor temp setting for Anti-Freeze + [2]°C
**However, During Cool mode this function cannot activate if Tank selection is “Buffer Tank".
**Solar pump can operate even if Heat pump is under error stop.
**Solar pump can operate even if Heat pump is under error stop.
Solar operation during error:
o During Tank sensor (DHW or Buffer depend on selection) abnormal, Solar operation will not able to function.
o During Solar Panel sensor detect OPEN (not include SHORT), Solar operation will not able to function too.
o During Solar Panel sensor detect OPEN (not include SHORT), Solar operation will not able to function too.
12.18 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 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 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)
Alternative Mode
o 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
o Boiler signal turn ON and heat pump and water pump turn OFF when:
Outdoor ambient < Outdoor Ambient Set AND
Boiler prohibit flag = 0
** However indoor water pump can operate when Anti-freeze control condition fulfilled.
o Boiler signal turn OFF and heat pump and water pump turn ON when:
Outdoor ambient > Outdoor Ambient Set + [2°C] OR
Boiler prohibit flag = 1
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