industrie technik evolution AHU-XXXSX1 series, User Manual

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if Treg decreases and Treg <= (WCS + (
157
*(2/3))) and Treg > (WCS + (
157
*(1/3))), speed 2 is ON,
if Treg <= (WCS + (
157
*(1/3))). speed 1 is ON.
For the modulating fan:
If Treg > WCS, the speed is modulated between 1 and 3.
- Winter control:
Treg
WHS
OFF
Fan 1
on/off speed
Treg
WHS
157
0
Modulating
fan
ON
Treg
WHS
157
OFF
Fan 2
on/off speed
FAN1
FAN2
Treg
WHS
157
OFF
Fan 3
on/off speed
FAN1
FAN3
FAN2
FAN1
FAN3
Treg: temperature of the control sensor
WCS: heating 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 >= WHS, speed 1 is ON and if Treg decreases when Treg < (WHS -
157
), speed 2 is ON,
if Treg increases and Treg >= (WHS -
157
/2), speed 1 is ON,
For the three-speed fan:
if Treg >= WHS, speed 1 is ON,
if Treg decreases and Treg <= (WHS - (
157
*(2/3))) and Treg > (WHS -
157
), speed 2 is ON,
if Treg < (WHS -
157
), speed 3 is ON,
if Treg increases and Treg >= (WHS - (
157
*(2/3))) and Treg < (WHS - (
157
*(1/3))), speed 2 is ON,
if Treg >= (WHS - (
157
*(1/3))), speed 1 is ON.
For the modulating fan:
If Treg < WHS, the speed is modulated between 1 and 3.