Carel FLSTDMAHUE, Руководство пользователя

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“FLSTDMAHUE” +030220961 - rel. 1.1 - 28.08.2019 39
Temperature priority
Temp.
request Humidity
request Preheating coil Cooling
coil Reheating
coil Humidi -
fier
Heating Dehumidif. Based on tem-
perature control
probe Off If “integration”
Cascade
control Off
Cooling Humidific. Off Based on
temp. con-
trol probe Off Waits for
tempe-
rature
set point
to be
reached
Tab. 9.b
Note: in the case of request of cooling and dehumidification the control
considers the greater than the two required on the cooling coil.
Humidity priority
Temp.
request Humidity
request Preheating coil Cooling coil Reheating
coil
Humidi -
fier
Heating Dehumidif. Waits for humi-
dity set point to
be reached Based on
humidity
control
probe If “compen-
sation”
Cooling Humidifica-
tion Control on
temperature
probe set down-
stream of coils
if humidifier =
adiabatic Waits for
humidity set
point to be
reached Off due to
cooling Based on
humidity
control
probe
Tab. 9.c
The “no priority” setting should be selected if evaporative cooling (DEC)
is enabled, in which case the simultaneous request for cooling and
humidification use the same actuator and therefore both influence each
other.
No priority
Temperature
request Humidity
request Preheating
coil Cooling coil Reheating coil
Heating Dehumidifi-
cation Off Control on
humidity
control probe
or probe
downstream
of coils Controls based
on request,
but only with
reheating
Return/
room
control Cooling Humidifica-
tion Off The cascade control ramp acts
on the humidity request, which
becomes the higher of the two
values (humidity request for
humidity control and humidity
request for temperature con-
trol) and any limits that com-
pensate for the value
Supply
control Cooling Humidifica-
tion Off Control on humidity control
probe while the cooling coil
controls the temperature (DEC
provides a free contribution)
Tab. 9.d
Note: see the paragraph on “Direct evaporative cooling - DEC”.
9.6 Set point compensation
Set point compensation adjusts the set point defined by the user with an
offset that depends on a probe. This function in some cases ensures energy
saving by adapting the set point to the outside temperature, while still
guaranteeing suitable values for comfort. A temperature set point of 23 °C
for example can be adjusted to 21 °C when the climate is extreme. In other
cases, it’s used to:
1.
improve comfort, reducing the difference between the outside
temperature and the inside or room temperature;
2. integrate another air-conditioning system: for example, if in summer
at 7 in the morning the outside temperature is lower than the room
temperature, the room probe can be used as the compensation probe
and the supply probe as the control probe to lower the set point and
exploit freecooling.
The following are possible:
1. differentiate between compensation in summer and winter;
2.
select the probe used for compensation, between outside, supply, return
and room probe;
3. increase or decrease the set point being compensated.
Note : compensation is disabled if the control probe and the
compensation probe are the same.
Below is an example with the compensation probe set as the outside
temperature probe that compensates the room temperature set point.
Start_comp
B1
End_comp
SetT
SetT+delta
SetT_comp
delta > 0
SUMMER
SetT-delta
delta < 0
Start_comp
B1
End_comp
SetT
SetT+delta
SetT_comp
delta > 0
WINTER
SetT-delta
delta < 0
Fig. 9.d
KKey
SetT Temperature set point End_comp End compensation
Delta Compensation delta B1 Compensation probe
Start_comp Start compensation SetT_comp Compensation set point
Screen index Display description Selection
Hc01 Main regulation probe selection
Temperature
Return ¦ supply ¦ room
Gfc08 Type of summer set point compensation
None ¦ external ¦ room ¦ supply ¦ return
Compensation delta
2 °C
Compensation start 25 °C
Compensation end 32 °C
Gfc09 Type of winter set point compensation
None ¦ external ¦ room ¦ supply ¦ return
Compensation delta
-2 °C
Compensation start 0 °C
Compensation end -8 °C