Home Anti-Freeze Protection - Toshiba ESTIA RUA-CP1701H Service Manual

Monobloc Outdoor Unit
Threshold
A OAT < AntiFreezeDeltaSetpoint [P517] + 6.0 ^C
OAT < AntiFreezeDeltaSetpoint [P517] + 6.0 ^C
B
LWT or EWT < AntiFreezeDeltaSetpoint [P517] + 4.0 ^C
OAT < AntiFreezeDeltaSetpoint [P517] + 6.0 ^C
C
LWT or EWT < AntiFreezeDeltaSetpoint [P517] + 3.0 ^C
OAT < AntiFreezeDeltaSetpoint [P517] + 6.0 ^C
D
LWT or EWT < AntiFreezeDeltaSetpoint [P517] + 2.0 ^C
Related Parameters for water freeze protection:
Par.No
814
517

8.2.12. Home Anti-freeze protection

This control is enabled by the room temperature measurement from the remote controller. It is used to maintain a
minimum room temperature.
When the room temperature goes below the pre-defined setpoint [P427], the unit will run in Booster Heating mode
until the room temperature in increased ([P427] + 2°C).
Home anti-freeze protection ON:
•
Room temperature < [P427]
Home anti-freeze protection OFF:
•
Room air temperature ≥ [P427] + 2°C
Room air temp (°C)
[P427] +2°C
Home anti-freeze setpoint
[P427]
ON
Home anti-freeze
protection control
OFF
ON
ESTIA monobloc unit
OFF
ON
Electric heater stages
OFF
ON
Main water pump
OFF
ON
Additional water pump
OFF
Conditions
<AND>
<AND>
<AND>
Description
Cooler Heater Type (clht_typ)
Anti-Freeze Delta Setpoint (clhrstp)
[1] [2]
Pump
Periodically
Periodically
Continuous
Continuous
Range
0 = No heater
1 = Heater on HEX
0.0 ~ 6.0 °C
45
Service Manual
Unit
Electric
Request
Heater
Mode
OFF OFF
ON OFF
ON OFF
BOOSTER
ON
HEAT
Default
1
0.0 °C