Double Set-Point - Trane Picco R3206A Manual

10.11 WARNINGS
If the double setpoint function is not active, one of the following warnings can be configured.
10.11.1 PLANT SEASON
A digital output can be configured indicating the operating season of the unit, plant side.
The output is active in summer mode, while it is deactivated in OFF or heating mode.
During DHW production and defrosting, the output maintains the setting of the source season.
I/O Resource (Parameter)
DO7 can be activated via H85
10.11.2 ALARM
È possibile configurare un'uscita in tensione che segnali la presenza di un allarme.
I/O Resource Parameter
DO7 can be activated via H85
10.11.3 MACHINE BLOCK
A live output can be configured signalling the presence of an alarm.
I/O Resource Parameter
DO7 can be activated via H85
10.11.4 DEFROST
A digital output can be configured signalling defrosting in progress.
I/O Resource Parameter
DO7 can be activated via H85
10.12 DEFROST CYCLE
The defrost cycle is only active in heat pump mode and is used to prevent the formation of ice on the surface of the air/air coil. The formation of
ice on the evaporator, which is quite frequent with very low outdoor temperatures, in addition to considerably downgrading the thermodynamic
performance of the unit, also risks damaging the unit itself.
If the unit is switched off by remote control during defrosting, the heat pump finishes defrosting and then places itself in off mode via remote
control.
10.13 COMPRESSOR CRANKCASE HEATER
The crankcase heater is activated if the compressor has been off for at least 30 minutes and if the discharge temperature is below a certain
threshold of 20 °C (with hysteresis of 2.0°C). The crankcase heater is disabled when the compressor starts back up.
10.14 DOUBLE SET-POINT
This function introduces a second working set-point on the plant side, both in cooling and heating mode.
The user terminal board allows a consent to be connected to switch from the first to the second set-point and configured at digital input ID9 with
parameter H53 = 26. The valve, on the other hand, is connected in the terminal board to digital output DO7 and is configured via parameter H85.
Parameter
H53
H85
H129
H138
10.15 MINIMUM HZ FUNCTIONALITY
Configuring parameter L02=1 and L03≠0 reduces the nominal operating Hz of the compressor.
Value
31
Value
24
Value
47
Value
21
VALUE
26
25
0
1
2
3
4
0
1
2
3 Enabled the second DHW set point in cooling and heating mode
Picco R32
Heat pumps inverter air/water with axial fans
Function
Plant season warning
Function
Alarm warning
Function
Alarm warning
Function
Defrost in progress warning
Function
Second set-point call
3-way valve for radiant panels
Function disabled (default)
Function configured but not active
Enabled only in cooling mode
Enabled only in heating mode
Enabled in cooling and heating mode
DHW second setpoint function disabled (default)
Enabled the second DHW set point in cooling mode
Enabled the second DHW set point in heating mode
25