Trane Picco R3206A Manual page 21

If you need to change the values of the parameters r22, r28, r08, follow r22 ≥ r28 ≥ r08.
Setting r22=r28 allows you to eliminate the zone relative to joint operation bracket I; setting r28=r08 allows you to eliminate the zone relative to
joint operation bracket II; setting r22=r28=r08 allows you to eliminate both brackets relative to joint operation.
Do not modify value r08, as it could jeopardise operation of the unit
10.9.1 OPERATION IN HEAT PUMP MODE
Normale operation of the heat pump in which the integration heaters and-or the boiler only intervene when a heat pump alarm is triggered.
10.9.2 JOINT OPERATION (I BRACKET)
If the outdoor temperature is between r22 and r28, the compressor operates in synergy with the auxiliary heaters in winter or DHW mode.
In this operating bracket, first the heat pump is activated and after r12 minutes the plant side auxiliary heaters, or after r16 minutes the sanitary
side auxiliary heaters.
The intervention priorities are defined by the parameters r14, r20, r23, r24.
It goes back to normal operation if the outdoor temperature is greater than r22+1.0 (°C).
NOTE: In the joint operating bracket, the boiler is temperature controlled by the plant water remote probe (if enabled). In particular, if the
temperature detected by the remote probe is lower than the Hea setpoint, the boiler is switched on and then will go off when the temperature
detected by the remote probe is higher than the Hea setpoint. The heat pump follows the activation logic described in paragraph 10.5.
If the remote plant water probe is not enabled, the boiler will be managed by the delivery probe of the heat pump.
10.9.3 JOINT OPERATION (II BRACKET)
If the outdoor temperature is between r28 and r08, the compressor operates in synergy with the auxiliary heaters.
In this operating bracket, first the boiler is activated, then the heat pump and auxiliary heaters intervene after a time defined by r12 (minutes)
for the plant side and r16 (minutes) for the sanitary side
The intervention priorities are defined by the parameters r14, r20, r23, r24.
It goes back to normal operation if the temperature rises above r28+1.0 (°C).
Note: In the joint operating bracket, the boiler is temperature controlled by the plant water remote probe (if enabled). In particular, if the
temperature detected by the remote probe is lower than the Hea setpoint, the boiler is switched on and then will go off when the temperature
detected by the remote probe is higher than the Hea setpoint. The heat pump follows the activation logic described in paragraph 10.5.
If the remote plant water probe is not enabled, the boiler will be managed by the delivery probe of the heat pump.
10.9.4 OPERATION IN SUBSTITUTION
If the outdoor temperature drops below r08 use of the heat pump compressor will be inhibited.
- If the auxiliary system is composed of plant and/or DHW heaters, they are active in substitution of the compressor with defined times, r12
(minutes) for plant side and r16 (minutes) for sanitary side.
Whereas in the operation in substitution bracket, the integrations do not need to be enabled with r10 or r15 as the heaters need to operate in
substitution (and not in integration) of the heat pump (therefore simply select the type of use with the parameter r24).
- If the auxiliary system is a boiler with autonomous circulator (r32 = 1 or 3).
The circulator of the heat pump is off, after P01 (default 30 seconds) the boiler is enabled.
NOTE: With water side antifreeze protection, the pump used is activated (or remains active) anyhow.
- If the auxiliary system in substitution is a boiler with autonomous temperature control (r32 = 0 or 2).
The boiler is enabled regardless of the temperature control of the heat pump.
- If the auxiliary system in substitution is a boiler without circulator (r32 = 0 or 2).
The circulator of the heat pump is on when the boiler is enabled.
The compressor switches back on if the temperature rises above r08+ r09 (°C) (r09=1.0 °C by default).
10.10 OPERATING BRACKETS - ACTIVATION OF INTEGRATION HEATERS (PLANT REMOTE
WATER PROBE NOT ENABLED)
The possible configurations of the integration parameters are listed in tables 1,2,3 and 4 shown below, divided by operating brackets (the op-
erating modes and possible values of the parameters are indicated in the "STATUS" boxes and in the parameters "rxx" so that a given order
of intervention of the integrations occurs in a certain operating mode of the unit; other statuses and values of the parameters can be selected
Outside
temp.
r22
Heat pump + Boiler/Heater
JOINT OPERATION I ZONE
r28
Boiler + Heat pump/Heater
JOINT OPERATION II ZONE
r08
OPERATION IN SUBSTITUTION
Picco R32
Heat pump
STANDARD WORKING
Boiler/Heater
Heat pumps inverter air/water with axial fans
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