1. Boiler operation
FTC can control boiler only in space heating mode.
When boiler is running, the heating operation is regulated by the room thermostat connected to FTC.
IMPORTANT NOTE: Be sure to connect room thermostat to FTC.
1.1 Wiring for boiler control
<Thermistor inputs>
Name
Terminal block
Item
Optional part model
THW6
TBI.5 7-8
Thermistor (Zone1 flow water temp.) (Option)
PAC-TH011-E
THW7
TBI.5 5-6
Thermistor (Zone1 return water temp.) (Option)
THWB1
TBI.6 7-8
Thermistor (Boiler flow water temp.)
PAC-TH012HTL-E
<Outputs>
Connect OUT10 to boiler external input (Room thermostat).
Name
Terminal block
Item
OFF
ON
Signal/Max current
OUT10
TBO.3 1-2
Boiler output
OFF
ON
non-voltage contact
• 220 - 240V AC (30V DC) 0.5 A or less
• 10 mA 5V DC or more
Note: • OUT10 is separated by basic insulation from other external output signals in FTC.
• Connect the surge absorber according to the load at site.
• When the wires are wired to adjacent terminals, use ring terminals and insulate the wires.
• Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each temperature.
If the wiring is too long, bundle it with a strap to adjust the length.
1.2 Dip switch setting
Set Dip SW1-1 and SW2-6 to ON .
Dip switch
Function
OFF
ON
SW1-1
Boiler
WITHOUT Boiler
WITH Boiler
SW2-6
Mixing tank
WITHOUT Mixing tank
WITH Mixing tank
1.3 Main controller setting
<Service menu> → “Heat source setting”
→ “Operation settings” → “Boiler operation”
Menu
Description
Heat source setting Hybrid
Automatically switch "Heat pump" and "Boiler".
Hybrid settings
Outdoor ambient temp.
Set the ambient temperature to switch to Boiler operation.
Priority mode
Set which one to prioritize (Ambient or Cost or CO
2
).
Outdoor ambient temp. rise
Difference in temperature to switch to Heat pump operation.
Intelligent settings
Energy price
Enter unit prices of electricity, and gas or oil (depending on boiler type) per 1 kWh.
CO
2
emission
Enter CO
2
emission amount from electricity or boiler (gas or oil).
Heat source
Enter outdoor unit capacity, electric heater capacity, and boiler efficiency.
Optional parts
D-41
HIGH TEMP. THERMISTOR
6
Optional parts
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