industrie technik evolution AHU-XXXSX1 series, User Manual

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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,
if Treg decreases and Treg < (WCS + (
157
*(2/3))) and Treg > (WCS + (
157
*(1/3))), speed 2 is ON,
if Treg decreases and Treg < (WCS + (
157
*(1/3))) and Treg > WCS, speed 1 is ON,
if Treg < WCS, the fan is off
For the modulating fan:
if Treg < WCS, the fan is off,
If Treg > (WCS +
158
), the speed starts at a speed between speeds 1 and 3.
The speed is modulated up to speed 3 if Treg continues to increase.
If Treg decreases and Treg < WCS, the fan is off.
- 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
158
157
Treg: temperature of the control sensor
WHS: heating operation setpoint
157
: proportional band of the fan
158
: step enabling for supply 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 (1
53
-
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, the fan is off
if Treg decreases and Treg < (WHS - (
157
/2)) and Treg > (WHS -
157
), speed 1 is ON,
If Treg < (WHS -
157
), speed 2 is ON,
if Treg increases and Treg >= (WHS - (
157
/2)) and Treg < WHS, speed 1 is ON,
if Treg > WHS, the fan is off