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8.11 10 K Ω DHW Indirect Water Heater
Connect 10 K Ω DHW indirect tank sensor or thermostat
(TS) to "T dhw" terminals on control board.
8.12 Frost Protection
Frost protection in combination with ON/Off
thermostat.
• If ON/Off thermostat is used, protect any rooms where
there is a risk of freezing by using freeze thermostat
(FT). Radiator valves or zone where there is risk of
freezing must be open.
• Connect frost thermostat in parallel with On/Off room
thermostat (RT) to ON/Off_OT terminals of control
board connection.
Frost protection in combination with outdoor
temperature sensor.
• Heating system can be protected against freezing in
1 K Ω
combination with
Radiator valve or zone must be open where there is a
risk of freezing.
1 K Ω
• Connect
outdoor temperature sensor to "T out"
terminals of control board.
• Frost protection activates when
temperature sensor reads a temperature lower than
10°F (-10°C ). This can be adjusted using parameter
P30. Circulation pump will switch on and operate
continuously until the outdoor temperature increases
past value set on parameter P30.
8 - ELECTRICAL CONNECTIONS
outdoor temperature sensor.
1 K Ω
outdoor
FIGURE 8-12 10 K Ω Indirect Water Heater Thermostat
FIGURE 8-13 Frost Protection in Combination with
ON/OFF Thermostat
46
10 K Ω
PN 240011664, Rev. F [07/30/2018]
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Troubleshooting
