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TH-1xxSx1
• 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) the icon “
COOL
“ turns on to indicate that cooling mode is
active.
If the operating temperature is lower than
I09
- (
I21
: 2) the icon “
HEAT
“ turns on to indicate that heating mode is active.
When the unit is turned on, if the operating temperature is in the neutral zone (
I21
), the mode is set to heating.
The cooling valve can be regulated with PI action if the integral time
I24
is non-zero, or with proportional action only if
I24
=0.
A01
100
0
Temp.
PBC
(
I23
)
Outputs
HH
(
I18
)
DZ
(
I21
)
ECM speed 1
% opening
valve
Fan
ECM speed 3
(
I31
)
0%
100%
AO2
FB
(
I27
< 100%)
AO2
Temp.
BS4P
(
I09
)
DO1
I27 = 100%
- Operation with
M02
=0 or 2 (digital
output
DO1
does not control an elec-
tric resistance).
If the operating temperature drops
below
I09
- (
I21
: 2) -
I18
, relay
DO1
is activated and the fan starts (output
AO2
) at speed 1, after startup delay
I36
. The speed then increases as
the operating temperature falls, arriv-
ing at speed 3 when the temperature
drops below
I09
- (
I21
: 2) -
I18
-
[
I27
x (FB -
I18
)].
The icon turns on to indicate that
heating mode is active.
If the operating temperature increas-
es to
I09
- (
I21
: 2) -
I18
the speed
remains constant at speed 1 until the
operating temperature exceeds
I09
-
(
I21
: 2).
At this point, icon turns off and,
depending on the value of parameter
I28
, the fan either stops or continues
running:
if
I28
=0 o 2, the fan stops,
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.
- 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
. The speed then increases as the operating temperature falls, arriving at
speed 3 when the temperature drops below
I09
- (
I21
: 2) -
I18
- [
I27
x (FB -
I18
)].
Icons and
turn on to indicate heating with electric resistance.
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).
At this point, icons and
turn off and, depending on the value of
I28,
the fan either stops after a 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, on the other hand, the electric resistance turns on, the fan starts immediately regardless
of the position of the minimum thermostat.
