M03Q40G6-03 30/07/08
pag
32
SECONDARY SET POINT – ECO
A secondary set point can be used with different levels to the “normal” set point.
It is normally set to give lower energy consumption with respect to the comfort setting:
•
The SECONDARY SUMMER set point is higher than the SUMMER setting.
•
The SECONDARY WINTER set point is lower than the WINTER setting.
It can be set according to individual requirements.
•
Secondary summer set-point parameter 29
•
Secondary winter set-point parameter 30
It can be activated from the keyboard, supervisor unit or the remote control. To change it using the remote control refer to the
ELECTRIC WIRING paragraph.
If the 3-way valve option for sanitary water is present, the 2° set point in heating can be activated by service/remote keypad
with par 49 =1
par Description
Meaning
value
49
Comando2°Set
2° set point mode control by parameter
0
MAINTENANCE
This way, the plant can be kept within the operating limits even when the unit is OFF or on STANDBY, for example during the
weekend or the night-time.
Periodically the system activates the circulation pump, measures the water temperature and activates the compressor, if
required, to take the water temperature to the set-point level.
•
Summer maintenance set-point par 42
•
Winter maintenance set-point
par 43
This function is activated by parameters 44 (activate summer maintenance level) and 45 = 1 (activate winter maintenance
level).
DUAL CONTROLS FOR TEMPERATURE – RADIANT PANELS
With the optional kit, a mixed plant can be controlled:
Fan coil (with the set-points seen above)
Radiant panels (with specific radiant set-points)
The radiant set point can be determined in different ways, for further details see the ELECTRICAL CONNECTIONS section.
FUNCTIONING WITH ETHYLENE GLYCOL
The units foreseen to function with glycoled water come out from the premise with standard parameters.
After having added glycol ethylene to water, the technician will properly set the plant.
% Ethylene glycol
Parameter to modify
10 %
20 %
30 %
40 %
32
Summer set point
1
- 4
- 10
- 18
77
Antifreeze heater set
- 2
- 7
- 13
- 21
80
Antifreeze alarm
- 2
- 7
- 13
- 21
84
Antifreeze pre-alarm threshold
- 1.5
- 6.5
- 12.5
- 20.5
