Toshiba Estia RUA-CP1701H, Руководство по обслуживанию

Страница: 47 / 164

Monobloc Outdoor Unit Service Manual
46
Control overview:
(1) With the system powered, but not running, the Monobloc unit starts in heating mode when the room
temperature is less than the temperature set in [P427]. At this time:
•
The main water pump is ON
•
The electrical booster heaters are OFF
•
The additional pump is OFF
(2) When the room air temperature increases to the temperature set in [P427] plus 2°C then the Monobloc unit
switches OFF. The system will not restart in the Home Anti-Freeze Protection until the room temperature
drops below the control threshold temperature set in [P427]
Please note that the home anti-freeze protection is active even when the unit is in the OFF mode (not in Cooling /
Heating / DHW).
Related parameters for the home anti-freeze protection control:
Par.No Description Range Default
427 Home anti-freeze setpoint – (freexstp): (°C) 6.0 ~ 12.0 6.0
Never switch off the unit, otherwise home anti-freeze protection cannot be guaranteed. For this reason the
main unit and / or customer circuit disconnect switch must always be left closed.
8.2.13.
Auto / climatic curve operation
The auto or climatic curve control automatically sets the water temperature set-point depending on the outside air
temperature (OAT).
Auto curve control is available for both heating and cooling functions. There are two types of auto curve available:
•
Custom
•
Predefined
i) Cooling mode:
Auto curve control, for cooling mode operation, can be enabled by setting the Cool Clim Curve Select parameter
[P586] as shown below:
Par.No Setting Function
586
-1 No curve (fixed water temperature)
0 Custom climatic curve
1 Cooling climatic curve 1
2 Cooling climatic curve 2
•
Custom climatic curve:
If the cooling climatic curve is configured to "0", the water set-point will be calculated according to the custom cooling
climatic curve.
Parameters Description Default Minimum Maximum
cl_min_a 587 Custom Minimum OAT 20.0°C 0°C 30°C
cl_max_a 588 Custom Maximum OAT 35.0°C 24°C 46°C
cl_min_w 589 Custom Minimum Water Temp 10.0°C 5°C 18°C
cl_max_w 590 Custom Maximum Water Temp 18.0°C 5°C 18°C