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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
if CO
2
<= (
167
+ (
168
*(1/3))), speed 1 is ON.
For the modulating fan:
If CO
2
>
167,
the speed is modulated between speeds 1 and 3.
Control of speed based on temperature (
009
=2):
- Summer control:
Control of the fans is carried out based on the temperature of the control sensor, the cooling operating setpoint and the
proportional band of the fan (parameter
157
).
Depending on the type of fan and the operating season, they will work according to the following chart:
Treg
WCS
OFF
Fan 1
on/off speed
Treg
WCS
157
0
Modulating
fan
ON
Treg
WCS
157
OFF
Fan 2
on/off speed
FAN1
FAN2
Treg
WCS
157
OFF
Fan 3
on/off speed
FAN1
FAN3
FAN2
FAN1
FAN3
Treg: temperature of the control sensor
WCS: cooling operation setpoint
157
proportional band of the fan
VEL1: speed 1
= [(
154
/ 100) x (
151
-
150
)] +
150
for the supply and
=[(
154
/ 100) x (
153
-
152
)] +
152
for the extraction.
VEL2: speed 2
= [(
155
/ 100) x (
151
-
150
)] +
150
for the supply and
=[(
155
/ 100) x (
153
-
152
)] +
152
for the extraction.
VEL3: speed 3
= [(
156
/ 100) x (
151
-
150
)] +
150
for the supply and
=[(
156
/ 100) x (
153
-
152
)] +
152
for the extraction.
For the two-speed fan:
if Treg <= WCS, speed 1 is ON and if Treg increases when Treg > (WCS +
157
), speed 2 is ON,
if Treg decreases and Treg <= (WCS +
157
/2), speed 1 is ON,
For the three-speed fan:
if Treg <= WCS, speed 1 is ON,
if Treg increases and Treg >= (WCS + (
157
*(2/3))) and Treg < (WCS +
157
), speed 2 is ON,
if Treg > (WCS +
157
), speed 3 is ON,
