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TH-4xxSx1
• 2 PIPE HEATING/COOLING mode with AUTOMATIC SEASON CHANGEOVER (
M01
=2):
The mode is selected automatically by the water sensor. Use a remote sensor for this function. Set parameters
M07
=1
or
M09
=1 or
M11
=1 and set the water sensor’s thresholds to define the function with parameters
I15
and
I16
. Select the
mode of automatic season changeover between the following graphs by parameter
I54
.
I54
=0 o 1
I54
=2
Summer
Winter
Temp. water
I16
I15
Summer
Winter
Temp. water
I16
I15
0,5°C
[1,0°F]
0,5°C
[1,0°F]
When the unit is turned on, if the water sensor temperature is between
I16
and
I15
, see paragraph
“12. Automatic sea-
son changeover with water sensor (M01=2 or 5)” page 24
for working season definition.
N.B.: if no remote sensor is configured as water sensor for season changeover function, the operating mode is not de
-
fined and the regulation does not start.
• 2 PIPE HEATING/COOLING mode with SEASON CHANGEOVER by CONTACT (
M01
=3):
The season is selected by the position of remote contact
DI1
or
DI2
configured with the “remote contact season changeo
-
ver” function. Configure one of the digital contacts as shown in the following table.
M03
(or
M05
)=0
Remote season
changeover contact
M04
(or
M06
)=
0
1
Summer
Winter
If the digital contacts are used for other functions, you can use a remote sensor input as “remote contact season change-
over” by configuring one of the remote sensors as shown in the table.
M07
(
M09
or
M11
)=0
Remote season
changeover contact
M08
(
M10
or
M12
)=
0
1
Summer
Winter
N.B.: if no digital contact and no remote sensor are configured as “remote contact season changeover”, the operating
mode is heating.
• 2 PIPE HEATING/COOLING with SEASON CHANGEOVER by PARAMETER (
M01
=4):
The season is selected manually (see
“MODE button functionality” page 9)
.
Once you have made the selection, either “
HEAT
” or “
COOL
” is displayed, depending on the mode.
Heating regulation is controlled as follows for 2 pipe heating/cooling mode (
M01
=2, 3, 4):
The “
HEAT
” icon is on to indicate that heating mode is active.