Siemens Climatix Series User Manual

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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
5.10.5 Max limitation fan
Direct expansion evaporator is enabled:
Main Index > Configuration > Configuration 1 > Cooling = DX...
Main Index > Configuration > Configuration 1 > Cooling 2= DX...
Main Index > Unit > Temp control > Cooling > Max limitation fan
Main Index > Unit > Temp control > Cooling 2 > Max limitation fan
Parameter Range Function
Set the maximum allowable expansion evaporator output
for the given active fan stage. The value limits the maxi-
mum possible refrigeration demand. The settings depend
on expansion evaporator and fan output.
Must be clarified with the manufacturer as required!
Fan stage 1 0...100 [%] Allowed expansion evaporator output when the fan is op-
erating on stage 1 or using the setpoint with the setpoint
for stage 1.
Fan stage 2 0...100 [%] Allowed expansion evaporator output when the fan is op-
erating on stage 2 or using the setpoint with the setpoint
for stage 2.
Fan stage 3 0...100 [%] Allowed expansion evaporator output when the fan is op-
erating on stage 3 or using the setpoint with the setpoint
for stage 3.
FanStage1 = 30 %
StartStage2 = 40 %
In this case, the controller output for fan state 1 is limited to 30%. So that the
switch-on point of 40% for expansion evaporator stage 2 is never achieved.
5.11 Humidity control
5.11.1 General
This section described parameters and settings relating to humidification and de-
humidification.
The required sensors and functions are enabled in configuration 1, configuration 2
and configuration I/Os.
Cooling must also be enabled for dehumidification.
Main Index > Configuration > Configuration 1
Parameter Range Function
Room hum sensor – No
– Yes
Room humidity sensor.
Supply air hum sensor – No
– Yes
Supply air humidity sensor.
Outs air hum sensor – No
– Yes
Outside air humidity sensor.
Cooling –
– No
– Water
– DX 1step
Only required for dehumidification!
– No (additional) cooling register.
– (additional) cold water register.
– (additional) 1 step direct expansion evaporator aggre-
Prerequisite
Parameter
Example
Prerequisite
Enable
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 83

Siemens Climatix Series Specifications

General

Application	HVAC control
Communication Protocols	BACnet, Modbus, KNX
Inputs	Analog and digital inputs
Outputs	Analog and digital outputs
User Interface	web interface
Power Supply	24 V AC
Protection Class	IP20
Mounting	DIN rail mounting