Operating instructions

InRoom Controller - Operating Instructions50
Are the conditions for
STARTSPEED met?
Does a dehumidification request
exist with the speed reduction
DEHUMSPEED?
Does the unit run in UPS ope-
ration with the speed reduction
USV-SPEED?
Has a filter alarm occurred and
must the speed be increased by
the filter offset ?
Is the minimum speed kept ?
Can a speed reduction REDUCE-
SPEED be made due to the non-
request of climatic functions within
the REDUCE TIME ?
The following decision processes are used by the
controller for the fan speed calculation.
The fan speed nmaxDX or nmaxCW is chosen ac
-
cording to the cooling priority and the conditions for
a malfunction change-over. (For details about the
cooling priority, see page 71.)
Then four queries are passed, which use a multiplica
-
tion of the speed with a factor, if positively answered.
Finally the algorithm checks whether the minimum
speed is kept and whether the conditions for the
REDUCE SPEED are kept, which can bypass the
minimum speed as the sole reduction.
Are the conditions for
a malfunction change-
over met for Dual-
Fluid-units ?
Cooling priority
1 (CW) 2 (DX) 0 (GE)
Are the conditions for
a malfunction change-
over met for Dual-
Fluid-units ?
nmax DX
Fan (Part 3) - Calculating the fan speed
Parameter-
setting:
nmaxDX: 100%
nmaxCW: 90%
10%
20%
30%
10%
60%
50%
Example 1:
n = nmaxDX
supposing: condition not ok
n = nmaxDX = 100%
supposing: condition ok
n = 100% x (100% - 10%)
n = 90%
supposing: condition ok
n = 90% x (100% - 20%)
n = 72%
supposing: condition ok
n = 72% x (100% - 30%)
n = 50.4%
supposing: condition ok
n = 50.4% x (100% + 10%)
n = 55.44%
condition not ok
because n < 60%
so n = 60%
condition not ok
because of dehumidification
n = 60%
Example 2:
n = nmaxCW
supposing: condition not ok
n = nmaxCW = 90%
supposing: condition ok
n = 90% x (100% - 10%)
n = 81%
supp.: condition not ok
n = 81%
supp.: condition not ok
n = 81%
supposing: condition ok
n = 81% x (100% + 10%)
n = 89.1%
condition ok
so n = 89.1%
supposing: condition ok
n = 89.1% x (100% - 50%)
n = 44,55%
yes
no
Legend:
next step
Y
NN
nmax CW nmax zone
Is T
air
> T
set
+ EMERSTART ?
(overload service)
CW standby manage-
ment enabled?
N Y