Start-up
CS3000 AWP – 6721852570 (2023/04)
54
Table 51
6.3 Domestic hot water
Domestic hot water management is of priority compared to the system.
In DHW production mode, the compressors start only if the DHW storage
temperature is above a minimum threshold.
The maximum supply temperature threshold of the system is variable
based on the outdoor temperature.
To prevent it from falling below the minimum temperature, it is advisable
to install a backup electric heater on the DHW storage.
Table 52 Outdoor temperature t0
The following components are required:
•3-way valve SV1
• Temperature probe Taf1 antifreeze protection for domestic hot water
• Temperature probe T5 regulation and switching between system and
DHW production
Fig. 71
Operations sequence:
1. Disconnect the probe Taf1 supplied and connected as standard on
the unit (main board-CN69).
2. Connect the probe Taf1 supplied as spare part with the 10mt cable
(main board-CN69).
3. After connecting the cable put the probe on the domestic hot water
line.
4. Connect T5 connector and put the T5 probe on the domestic hot
water storage.
Fig. 72
7Start-up
General
The indicated operations should be done by qualified technician with
specific training on the product.
The electrical, water connections and the other system works are
performed by the installer.
Upon request, the service centres performing the start-up. Please agree
with the service centres, in advance, the start-up data.
For details, refer to the various chapters in the manual.
Before checking, please verify the following:
• the unit should be installed properly and in conformity with this
manual;
• the electrical external isolation device should be sectioned at the
beginning;
• the line sectionalizing device is open, locked and equipped with the
suitable warning;
• make sure no tension is present.
CAUTION
After turning off the power wait at least 10 minutes before
accessing to the electrical panel or any other electrical component.
▶ Before accessing check with a multimeter that there are no residual
stresses.
▶ Do not power the unit with empty water side exchangers. It could
cause possible damages to the anti-freeze electric heaters.
SA4 ON/OFF
SA5 C/H
SA6 DHW
SA7 D-S-P
SA8 SILENT
SA12 DHW 4...20mA
SA13 DH 0 - 10V
SA14 Heat-Set 0 - 10V
SA15 Heat-Set 4...20mA
SA16 Cool-Set 4...20mA
SA17 Cool-Set 0 -10V
SA18 DL 4...20mA
SA19 DL 0 -10V
SA20 E_Gas Boiler
SA21 EVU
SA22 S-G
BMS Customer BMS
Outdoor
temperature t0
T5 DHW storage
tanks
Compr.
Backup
heater
24ºC < to <= 30ºC <15ºC OFF ON
24ºC < to <= 30ºC >=15ºC ON OFF
to > 30ºC <20ºC OFF ON
to > 30ºC >=20ºC ON OFF
0010045075-001
XT1
SV1
GREEN
WHITE
BLUE
NNCNOV2
BROWN
BLACK
BLUE
0010045076-001
ON
S6
ENC2
POWER
ENC4
NET_ADDRESS
0
8
E
6
C
4
2
A
3
B
1
9
D
5
F
7
0
8
E
6
C
4
2
A
3
B
1
9
D
5
F
7
ON
S12
ON
S5
MAIN BOARD
DSP1 DSP2
8.8.8.8.
CN69
Taf1
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