197
o
Boiler signal turns OFF when
Outdoor ambient > Outdoor Ambient Set + [2°C]
OR
Heat pump not operates at tank side.
OR
Boiler prohibit flag = 1
Boiler prohibit flag control
Purpose:
o
For product safety. Boiler signal is OFF when water temperature is too high.
Start condition:
o
Water outlet ≥ 85°C continues for 5 minutes.
o
Water inlet ≥ 85°C continues for 5 minutes.
o
Zone1 water temp ≥ 75°C continues for 5 minutes.
o
Zone2 water temp ≥ 75°C continues for 5 minutes.
Contents:
After start condition fulfilled, set boiler prohibit flag = 1
Cancel condition:
o
After 30 minutes from start condition fulfilled.
Contents:
Set boiler prohibit flag = 0
14.18 External Room Thermostat Control (Optional)
Purpose:
1. Better room temperature control to fulfill different temperature request by external room thermostat.
Recommended external room thermostat:
Maker
Characteristic
Siemen (REV200)
Touch panel
Siemen (RAA20)
Analog
Connection of external room thermostat:
Wire Connection and thermo characteristic of Siemen REV200:
Setting
L/L1 (H)
Heat Thermo
L/L2 (C)
Cool Thermo
Set Temp < Actual Temp
Open Circuit
OFF
Short Circuit
ON
Set Temp > Actual Temp
Short Circuit
ON
Open Circuit
OFF
Cooling
Heating
Siemen REV200
Indoor Unit
L
N
C
H
L (label)
L1 (label)
L2 (label)
9 : Terminal Board No.
Connect only heating line for heating only model. And connect both
heating and cooling line for heat + cool model.
Wire Connection and thermo characteristic of Siemen RAA20:
Setting
L/Y1 (H)
Heat Thermo
L/Y2 (C)
Cool Thermo
Set Temp < Actual Temp
Open Circuit
OFF
Short Circuit
ON
Set Temp > Actual Temp
Short Circuit
ON
Open Circuit
OFF
