Carel FLSTDMAHUE, User Manual

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“FLSTDMAHUE” +030220961 - rel. 1.1 - 28.08.2019 51
On/Off fans with direct and star - delta starting
The fans are started when the unit is powered up. For starting, as well as the
fan outputs, the outputs for the 3 contactors also need to be enabled (see
the figure)
1. Supply/return air fan line (K1)
2.
Supply/return air fan star (K3);
3.
Supply/return air fan delta (K2)
The switching delay time also needs to be set.
M
3~
K1
K2
K3
L3
L1
L2
Fig. 9.p
Screen index Display description Selection
Ha03 Fan type 1: On-Off(direct start) ¦ 2: On-Off(star-delta)
¦ 3: On-Off (double) ¦ 4: Inverter ¦ 5: On-Off(2
speed) ¦ 6: On-Off (duty standby) ¦
Hb37 Star-delta logic
Supply fan line
position ≠0
Supply fan star position ≠0
Supply fan delta position ≠0
Hb37 Return fan line position ≠0
Return fan star position ≠0
Return fan delta position ≠0
Screen index Display description Def Min Max UOM
Hc04 Fans Star-Delta timing
Star-line
- 0 99 ms
Star - 0 99 ms
Star-delta - 0 99 ms
ON
OFF
ON
OFF
t
K1
d1
REQ
ON
OFF
ON
OFF
K3
K2
d2
d3
Fig. 9.q
Key
REQ Fan request
K1 Fan line K2 Fan delta
K3 Fan star d1 Line – star delay
d2 Star-delta delay d3 Star time
Double On/Off fans
This is when there are two fans fitted in parallel, to modify the ventilating
section. Activation again depends on unit power-on, however a delay is
available between activation of the first and second fan (supply – return).
Screen index Display description Def Min Max UOM
Hc06 Fans timing
Stop delay
30 0 999 s
Supply-return 0 0 999 s
Fans with inverters
If the fans are controlled by inverter, three types of control can be selected:
Screen index Display description Selection
Ha03 TYpe of control 1: Static pressure ¦ 2: Air quality
¦ 3: Fixed speed ¦ 4: Air flow-rate
1.
Constant pressure/flow-rate: at unit power-on, the fan will operate
at minimum speed and subsequently will try to reach the differential
pressure/flow-rate set point, using the PID parameter settings. The values
are converted using the formula shown in the figure, once the value of
coefficient K has been set. The set point can be selected as pressure or
flow-rate, according to the formula shown in the figure. The flow-rate
setting allows a different set point to be selected in pre-comfort, comfort
and economy modes.
∆
p
V = k
—
∆ p
.
V = p ort a t a /
flow r a te
p = p ressione/
p ressure
.
Fig. 9.r
Screen
index Display description Def Min Max UOM
Hc07b Coefficient for calculating the
flow-rate
Supply K
0 0 5000 -
Return K 0 0 5000 -
Gfc17 Supply fan inverter
Minimum/fixed power
30 0 100 %
Maximum power 100 0 100 %
Return fan inverter %
Minimum/fixed power 30 0 100 %
Maximum power 100 0 100 %
Gfc18 Supply fan inverter flow
Set point
1500 0 Max supply press.
diff. limit
Pa
Differential 300 0 1000 Pa
Integral time 300 0 1000 s
Derivative time 10 0 9999 s
Gfc19 Return fan inverter flow
Set point
1500 0 Max return press.
diff. limit
Pa
Differential 300 0 1000 Pa
Integral time 300 0 1000 s
Derivative time 10 0 9999 s
Gfc19a Supply flow control set point
Comfort:
20000 0 3276700 m 3 /h
Pre-comfort: 20000 0 3276700 m 3 /h
Economy: 20000 0 3276700 m
3
/h
Gfc19b Return flow control set point
Comfort:
20000 0 3276700 m 3 /h
Pre-comfort: 20000 0 3276700 m
3
/h
Economy: 20000 0 3276700 m
3
/h
Gfc19c Supply air flow control
Differential
1000 0 3276700 m 3 /h
Integral time 300 0 9999 s
Derivative time 10 0 9999 s
Neutral zone 500 0 200000 m 3 /h