APC INROOM ACPSC3000 Provozní pokyny stáhnout pdf (Strana 69)

69InRoom Controller - Operating Instructions

R2, R3

14 15 16 17 T/°C

T/°C

20,5

20

68 70 72 74 r.h/%

r.h/%

50

49

21 22 23 24 T/°C

T/°C

18

17,5

38 39 40 41 r.h/%

r.h/%

50,5

50

Service

Display Gen. settings

Control/Parameters

Using the room control with supply air

limitation causes the control to take place

using a T/H sensor in the return air intake

and a second T/H sensor in the supply

air intake. The control takes place in the

same way as room air control, the tem-

perature setpoint is shifted only when the

supply air temperature exceeds the start

temperature

➋. The extent of the setpoint

increase is determined by a factor which

you enter, as a gradient

➌, in the menu.

The relationship, according to which the

setpoint increase happens, is made clear

by the graph on the left side. A steep

gradient drastically corrects the failure

to meet the supply air temperature, but

has the risk that the control circuit starts

to oscillate.

With humidity control the setpoint shift

takes place in the opposite direction. If the

adjusted starting humidity ➍ is exceeded

by the measured supply air humidity, the

setpoint is reduced. You can also enter a

gradient factor

➎ for this. The relationship

is shown in the graph on the right side.

New setpoint = old setpoint + gradient •

(start value - actual value)

The supply air control with room air limita

-

tion is based on the same control principle

as the supply-air limited room air control.

Only here the setpoint shift works in the

opposite direction, because it works on

the basis that the supply air is colder than

the return air.

If the room temperature exceeds the start

temperature entered, the temperature

setpoint is reduced.

If the room humidity drops below the

starting humidity entered, the humidity

setpoint is increased.

The limit values of all four input variables

are monitored for room air control with

supply air limitation and for supply air

control with room air limitation.

- Room air temperature

- Room humidity

- Supply air temperature

- Supply air humidity

Actual value

Supply air sensor

Setpoint

Room air sensor

Temperature

Humidity

Actual value

Supply air sensor

Setpoint

Room air sensor

Example (temperature):

20.5 = 20 + 0.5 • (16 - 15)

Example (humidity):

49 = 50 + 0.5 • (70 - 72)

Actual value

Room air sensor

Setpoint

Supply air sensor

Temperature

Example:

17.5 = 18 + 0.5 • (22 - 23)

Humidity

Actual value

Room air sensor

Setpoint

Supply air sensor

Example:

50.5 = 50 + 0.5 • (40 - 39)

Note:

For corresponding commands, see previous

page.

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