Remote-Controlled Functions - Trane Picco R3206A Manual

Switching from utility water to domestic hot water, the working probe changes from "water outlet probe" to "DHW tank probe". Switching from
winter mode to sanitary mode, the compressor does not switch off and is brought to the maximum frequency established by the controller,
whereas switching from summer mode to domestic hot water, the compressor is switched off and waits a safety time.
Defrosting is always carried out in winter mode on the utility side, and never on the domestic hot water tank.
NOTE:
-If H10 = 1/3/5. Switching off the unit by remote control (remote on-off, see paragraph 10.4.1) does not affect domestic hot water operation. The
unit goes to priority sanitary mode just powered on. The display on the machine shows the temperature detected by the probe inside the DHW
tank. When the sanitary cycle has finished, the display goes back to showing the water outlet probe temperature.
If the remote ON-OFF digital input (terminals 15.1 / 15.2) is open, with sanitary function enabled (H10=1 and H20=6), the wording "SAN" will
appear on the machine display. When the sanitary cycle has finished, the display goes back to showing "E00" indicating that the remote ON-OFF
contact is open.
-If H10 = 2/4/6, the remote on-off function disables domestic hot water production and operation of the heat pump in heatin and cooling mode,
system side.
10.2.1 MEMORISING THE PROBE IN HEATING MODE
Switching from utility water to domestic hot water, the working probe changes from "water outlet probe" to "DHW tank probe". For this reason,
in heating mode, before entering sanitary mode, the last value read by the heat pump delivery probe is stored.
When sanitary temperature control is fulfilled, the system side temperature of reference goes back to that previously stored. The memory
function interrupts:
• when the temperature read by the probe becomes lower than the stored value;
• or when a time equal to b06 seconds (default b06 = 45) has elasped.
10.2.2 HEATING MODE ON DHW STORAGE TANK
If the parameter H130=1, the machine exploits the DHW storage tank even for central heating. In these conditions, the outlet of the DHW valve
is also enabled during operation in heating mode and not only in sanitary mode. The valve is deactivated during defrosting and in cooling mode.
When H130=1, the DHW integration heater can be enabled also to act as system integration heater: to do this, set r10=1 e r15=2 (for other r15
settings see Paragraph 10.6.3); furthermore no digital output must be set as system integration heater.
10.2.3 INSUFFICIENT HEAT EXCHANGE IN A DHW SYSTEM
During DHW production, if the heat pump flow probe detects a temperature higher than 60°C, the DHW valve output is de-energised (DO6), and
the value of the DHW probe at this time is recorded (Tsan,set).
-if the operation is San or Cool+San the compressor is stopped.
-If the operation is Heat+San, the system evaluates for b06 seconds whether there is a demand for heating from the system. If the system re-
quires it, the compressor continues to work on the system, otherwise it is switched off.
-If the DHW resistor is present (e.g. DO3, H81=26), r15 = 0 or 1 and r24=2 or 3 it is activated until the DHW setpoint detected by the DHW probe
is met (and any offset).
The compressor restarts when the flow temperature of the heat pump falls below 60°C again and the temperature measured by the DHW probe
is lower than Tsan,set - 4°C.
10.3 REMOTE-CONTROLLED FUNCTIONS
Not all of the configurations can be activated and/or modified at the same time
The terminal block has digital inputs to control the unit via an external consent.
10.3.1 ON/OFF
The function is enabled by default on digital input ID 3 (terminals X15.1/X15.2).
Remove the terminal block jumper to place the unit in standby (the text "E00" appears on the controller display). When the contact closes, the
machine comes out of standby and the circulator switches on for 2 minutes.
Function enabled by default (Parameter H47=2).
I/O Resource- Parameter
ID3 can be activated via H47
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.
10.3.2 SUMMER/WINTER MODE CHANGE
The function can be set on digital input ID 2 (terminals X16.1/X16.2).
Heating or cooling mode of the heat pump can be managed by remote control.
I/O resource - Parameter
ID2 can be activated via H46
The poles of the digital input can be swapped by setting H75 = 2
10.3.3 DHW ENABLE FROM DIGITAL INPUT
Function which can be activated instead of managing the double setpoint.
If DHW mode is enabled, instead of using the temperature probe, the domestic hot water function can be activated by the opening/closing of
a digital input on the unit. This function is recommended when using two or more heat pumps in cascade hydronically connected to the same
domestic hot water storage tank; this way activation of the domestic hot water function is controlled by the tank probe connected to the first
unit, while the other units are enabled automatically by digital consent.
The system goes to sanitary mode when the digital input closes and exits DHW production when it opens.
18
Value
3
Picco R32
Heat pumps inverter air/water with axial fans
Function
Enables remote On /Off function
Function
Open contact -> heat pump in cooling mode.
Closed contact -> heat pump in heating mode.