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TH-1xxSx1
• 4 PIPE HEATING/COOLING mode + ELECTRIC RESISTANCE (
M01
=9)
When 4 pipe heating/c electric resistance is chosen, parameter
M02
is automatically checked (this parameter
determines the stage with which the electric resistance is combined).
If
M02
=0 (electric resistance disabled), it is automatically forced to 2 (electric resistance assigned to second stage). This
value can be edited.
-
M01
=1 assigns the electric resistance to stage 1.
-
M01
=2 assigns the electric resistance to stage 2.
-
M01
=3 assigns the electric resistance to stages 1 and 2 both.
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 proportional action only if
I24
=0.
A01
100
0
Temp.
DIFF
(
I20
)
Outputs
BS4P
(
I09
)
DZ
(
I21
)
HH
(
I18
)
HH
(
I18
)
PBC
(
I23
)
DO1
DO2
ECM speed 1
% opening
valve
Fan
ECM speed 3
(
I31
)
0%
100%
AO2
FB
(
I27
< 100%)
AO2
Temp.
I27 = 100%
If the operating temperature drops below
I09
- (
I21
: 2) -
I18
, relay
DO1
is activated.
Icon turns on if
M02
=2 and icons and
both turn on if
M02
=1 or 3.
The fan (output
AO2
) starts at speed 1, after the startup delay
I36
, if
M02
=2.
The fan (output
AO2
) starts immediately at speed 1, regardless of the startup delay, if
M02
=1 or 3.
The speed then increases as the operating temperature drops, and arrives at speed 3 when the operating temperature
drops below
I09
- (
I21
: 2) -
I18
- [
I27
x (FB -
I18
)].
If the temperature drops below
I09
- (
I21
: 2) -
I20
-
I18
, stage 2 (output
DO2
) is activated
If the temperature rises above
I09
- (
I21
: 2) -
I20
, stage 2 is deactivated. If
M02
=2, icon
turns off.
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 , 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, on the other hand, the electric resistance turns on, the fan starts immediately regardless
of the position of the minimum thermostat.
If the operating temperature rises above
I09
+ (
I21
: 2) the cooling valve starts to open (output
AO1
). Icon turns on.
The fan (output
AO2
) starts when the valve reaches the minimum aperture given by parameter
I31
, and after the fan
start delay
I36
has expired.
