industrie technik TH-xxxSx1 Series, Руководство пользователя

Страница: 96 / 126

96/126
The regulation logic is as follows:
ON
OFF
Temp.
HH
(
I18
)
Outputs
BHS
(
I07
)
HH
(
I18
)
DIFF
(
I20
)
DO1 DO2
speed 1
Fan
speed 3
speed 2
(
I26
)
(
I27
)
Temp.
FB
DO5
DO4
DO3
If the operating temperature drops below
I07
- (
I18
: 2) relay DO1 is activated.
Icon turns on if
M02
=2 and icons and both turn on if
M02
=1 or 3.
The fan starts at speed 1, after the startup delay
I36
, if
M02
=2.
The fan starts at speed 1 immediately, regardless of the startup delay
I36
if
M02
=1 or 3.
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
I07
- (
I18
: 2) - [
I26
x (FB -
I18
)],
- the speed switches from speed 2 to speed 3 when the temperature drops below
I07
- (
I18
: 2) - [
I27
x (FB -
I18
)].
If the operating temperature drops below
I07
- (
I18
: 2) -
I20
, stage 2 is activated (output DO2 )
If the temperature rises above
I07
+ (
I18
: 2) -
I20
, stage 2 is deactivated. if
M02
=2, icon turns off.
If the operating temperature increases to
I07
- (
I18
: 2) the speed remains constant at speed 1 until the operating tem-
perature rises above
I07
+ (
I18
: 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.
Speed 1 is activated and deactivated together with the heating output.
The hysteresis of speeds 2 and 3 is calculated automatically at 20% of the FB band (see “3 speed on-off motor speed
control logic with on/off outputs” page 29
).
Example: if
I18
=0.5°C, FB=2°C, the hysteresis of speeds 2 and 3 is 0.4°C.
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,
- parameter
I25
is not used.