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6.1.2 - Low-temperature start
The heaters intervene to ensure start-up even in conditions of low temperature of the hydraulic circuit water
(conditions which occur occasionally as, for instance, before start-up of the system or when it is necessary to
dry the screed). Once the hydraulic circuit water reaches a temperature of approximately 12°C, the heaters
switch off and normal operation of the heat pump is restored.
6.1.3 - Legionella prevention function
The Legionella prevention function is governed by the parameters from ADDR228 to ADDR233.
The parameter ADDR229 differentiates two macro modes:
ADDR229=0
The Legionella prevention function is obtained by means of the combination of the main heat pump and of
an optional electric heater (output K5).
The production of domestic hot water is managed with a temperature probe T3 ADDR228=2 and the Le-
gionella prevention function is enabled (ADDR230>0), then the machine works as follows:
- It starts at the time ADDR231 and every ADDR230 days starts water heating until temperature ADDR232
is reached.
- When the machine reaches temperature ADDR232, it maintains it within 2°C for a time equal to ADDR233;
if temperature ADDR232 is not reached within 7 hours from start-up, once 24 hours have elapsed, the
machine tries again and the alarm E08 appears at the second failure.
ADDR229=1
The Legionella prevention function is obtained by means of the sole optional electric heater (output K5)
and maintains the same modes described in the parameter ADDR229=0.
Output K5 cannot be connected directly to the heater, add an external relay with appropriate electrical
specifications.
The Legionella prevention function is carried autonomously from the secondary circuit to R134a.
6.2 - REMOTE CONTROL
It is possible to control some functions of the appliance remotely.
Parameter "ADDR220"
0 = remote control disabled
1 = remote control through serial
2 = remote control through free contacts
6.2.1 - Serial
The control from serial is only possible through SIOS CONTROL domotic.
If control from serial is enabled, some functions on the main screen are disabled (mode of operation, timer).
6.2.2 - Free contacts
The connections of the contacts must be carried out on the terminal box of the internal unit electronic board.
The contacts must be closed on terminal L. If control from contacts is enabled, some functions on the main
screen are disabled (mode of operation).
Terminal
terminal 1
terminal 2
terminal 3
terminal 4
terminal 5
EN - 40
Description
Cooling mode enabling
Heating mode enabling
ECO setpoint enabling
Night function enabling
COMMON CONNECTED TO N
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