74
16.5 Storage control
If P154 = No
→ The control mode remains standard and may be
adjusted to the return or supply line depending on the value of
P141 (control mode).
If P154 = Yes
→ Storage control is enabled. The control mode is
managed based on the setpoint selected:
- If setpoint 1 is selected, the control remains standard and the
mode (supply or return) is selected by P141 (control mode).
- If setpoint 2 is selected, the control automatically switches to
„return with storage‟ mode.
This type of control makes it possible to generate maximum capacity at a given time, often when electricity is cheapest.
- One after the other, the compressor stages turn on in 10-second intervals at value P122 + P155. When P122 is reached, the stages are shut
off at the rate of one per second.
- The setpoint 2 LED lights up.
- All limits are maintained.
NOTE:
Control based on the outdoor temperature is not available if setpoint 2 is selected. It is, however, available with setpoint 1.
This operating mode is available in cooling mode only.
16.6 Control setpoint (P251) management
16.6.1 If P142 (water loop winter protection) = No:
If P120 (setpoint No.) = 1
In cooling mode:
If P127 cooling setpoint adjustment = f (outdoor temperature) = 0
or outdoor sensor fault; Control setpoint = P121
If P127 = 1 and no fault on outdoor sensor, setpoint f (outdoor
temperature) is calculated using P121.
In heating mode:
If P131 heating setpoint adjustment = f (outdoor temperature) = 0
or outdoor sensor fault; Control setpoint = P123
If P131 = 1 and no fault on outdoor sensor, setpoint f (outdoor
temperature) is calculated using P123.
If P120 (setpoint No.) = 2 selected via console
In cooling mode:
If P127 cooling setpoint adjustment = f (outdoor temperature) = 0
or outdoor sensor fault; Control setpoint = P121 or P122
depending on selection on console
If P127 = 1 and no fault on outdoor sensor; Setpoint f (outdoor
temperature) is calculated using P121 or P122 based on the
selection made via the console.
In heating mode:
If P131 heating setpoint adjustment = f (outdoor temperature) = 0
or outdoor sensor fault; Control setpoint = P123 or P124
depending on selection on console
If P131 = 1 and no fault on outdoor sensor; Setpoint f (outdoor
temperature) is calculated using P123 or P124 based on the
selection made via the console.
If P120 (setpoint No.) = 2 selected via on/off input
The on/off input corresponds to terminals 4-5 on terminal block J6 on the motherboard.
In cooling mode:
If P127 cooling setpoint adjustment = f (outdoor temperature) = 0
or outdoor sensor fault; Control setpoint = P121 if on/off input
open; P122 if on/off input closed.
If P127 = 1 and no fault on outdoor sensor:
- Setpoint f (outdoor temperature) is calculated using P121 if the
on/off input is open.
- Setpoint f (outdoor temperature) is calculated using P122 if the
on/off input is closed.
In heating mode:
If P131 = 0 or outdoor sensor fault; control setpoint = P123 if
on/off input open; P124 if on/off input closed.
If P131 heating setpoint adjustment = f (outdoor temperature) = 1
and no fault on outdoor sensor:
- Setpoint f (outdoor temperature) is calculated using P123 if the
on/off input is open.
- Setpoint f (outdoor temperature) is calculated using P124 if the
on/off input is closed.
16.6.2 If P142 (water loop winter protection) = Yes and automatic operation control input open:
The control setpoint = 30°C.
16.6.3. Management of the setpoint
b
ased on the outdoor temperature:
P127 cooling setpoint adjustment = f (outdoor temperature) or P131 heating setpoint adjustment = f (outdoor temperature) = 1
This control is used to adjust the cooling or heating setpoint based on the outdoor temperature. In either case, the setpoint with the highest
value is the one that is adjusted.
NOTE:
Minimum setting of 5 K between start and end of setpoint drift.
R E T U R N T E M P . : - x x . x °
S E T P O I N T : - x x . x °
Heat exchanger water
inlet temperature
Summary of Contents for Magister 2 Series
Page 2: ......
