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TH-4xxSx1
• 4 PIPE HEATING/COOLING mode (
M01
=8)
The mode is selected automatically in relation to the operating temperature (see
“11. Regulation sensor(s)” page 24
).
If the operating temperature is greater than
I09
+ (
I21
: 2) +
I19
, the icon “
COOL
“ turns on to indicate that cooling mode
is active.
If the operating temperature is lower than
I09
- (
I21
: 2) -
I18
, the icon “
HEAT
“ turns on to indicate that heating mode is
active.
At startup, if the operating temperature is in the neutral zone, the “
HEAT
“ icon turns on.
BS4P
(
I09
)
DZ
(
I21
)
speed 1
Fan
speed 3
speed 2
(
I26
)
(
I27
)
ON
OFF
Temp.
HH
(
I18
)
Output
Temp.
FB
DO5
DO4
DO3
DO1
HC
(
I19
)
(
I26
)
(
I27
)
FB
DO5
DO4
DO3
DO2
- Operation with
M02
=0 or 2 (digital output
DO1
does not control an electric resistance).
If the operating temperature drops below
I09
- (
I21
: 2) -
I18
, heating relay
DO1
is activated and the fan starts at speed
1, after startup delay
I36
.
- Operation with
M02
=1 or 3 (digital output
DO1
controls an electric resistance).
If the operating temperature drops below
I09
- (
I21
: 2) -
I18
relay
DO1
is activated and the fan starts immediately at
speed 1, regardless of the startup delay
I36
.
If the temperature continues to fall, the speeds switch as follows:
- the speed switches from speed 1 to speed 2 when the temperature drops below
I09
- (
I21
: 2) -
I18
- [
I26
x (FB -
I18
)],
- the speed switches from speed 2 to speed 3 when the temperature drops below
I09
- (
I21
: 2) -
I18
- [
I27
x (FB -
I18
)].
Icon turns on to indicate that heating mode is active (
M02
=0 or 2) or icons and
turn on to indicate that heating
mode with electric resistance is active (
M02
=1 or 3).
If the operating temperature increases to
I09
- (
I21
: 2) -
I18
the speed remains constant at speed 1 until the operating
temperature exceeds
I09
- (
I21
: 2).
Icon (
M02
=0 or2) or icons and
(if
M02
=1 or 3) turn off and, depending on the value of
I28,
the fan turns off after
delay
I35
or stays on for air recirculation:
if
I28
=0 or 2, the fan stops after delay
I35
.
if
I28
=1 or 3, the fan stays on at speed 1.
if
I28
=4 or 6, the fan stays on at speed selected manually.
N.B.: if the minimum thermostat function is active, the thermostat itself must be closed when the valve is in regulation,
otherwise the fan will not start. If the electric resistance is on, the fan starts immediately regardless of the position of the
minimum thermostat,
If the operating temperature rises above
I09
+ (
I21
: 2) +
I19
, relay
DO1
is activated and the fan starts at speed 1 after
startup delay
I36
.
If the temperature continues to rise, the speeds switch as follows:
- the speed switches from speed 1 to speed 2 when the temperature rises above
I09
+ (
I21
: 2) +
I19
+ [
I26
x (FB -
I19
)],
- the speed switches from speed 2 to speed 3 when the temperature rises above
I09
+ (
I21
: 2) +
I19
+ [
I27
x (FB -
I19
)].
The icon turns on to indicate that cooling mode is active.
If the operating temperature falls to
I09
+ (
I21
: 2) +
I19
, the speed remains constant at speed 1 until the operating
temperature drops below
I09
- (
I21
: 2).
