Siemens Climatix Series User Manual

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Siemens Standard application AHU CE1P3977en_02
Building Technologies Functions 01.02.2010
5.10 Cooling / Cooling 2
5.10.1 General
Cooling / Cooling 2 enabled and preconfigured in configuration 1, configuration 2
and configuration I/Os.
Main Index > Configuration > Configuration 1
Parameter Range Function
Cooling /
Cooling 2
– No
– Water
– DX 1Step
– DX 2Steps
– DX 3Steps
– No (additional) cooling register.
– (additional) cold water register.
– (additional) 1 step direct expansion evaporator
aggregate.
– (additional) 2 step direct expansion evaporator
aggregate.
– (additional) 3 step direct expansion evaporator
aggregate.
Main Index > Configuration > Configuration 2
Parameter Range Function
Cooling pump /
Cooling 2 pump
– No
– Yes
– Yes+Kick
– No cooling register pump.
– Cooling register pump without pump kick.
– Cooling register pump with pump kick.
Clg pump alarm /
Cooling 2 pump alm
– No
– Alarm
– Fdbk
– Both
– Pump without alarm or feedback.
– Pump with alarm.
– Pump with feedback.
– Pump with alarm and feedback.
ClgDX alarm /
Cooling 2 Dx alarm
– No
– Alarm
– Fdbk
– Both
– Direct expansion evaporator without alarm or
feedback.
– Direct expansion evaporator with alarm.
– Direct expansion evaporator with feedback.
– Direct expansion evaporator with alarm and
feedback.
Cooling 2 control – StandAlone
– InSequence
– Not integrated in sequence.
– Integrated in sequence.
You can select between cold water register and direct expansion evaporator for
both cooling registers. The cold water register can be operated with or without
pump (with pump kick, alarm, feedback). The direct expansion evaporator register
can have up to 3 stages (binary control). It blocks cooling when outside air tem-
peratures are too low. The additional cooling register can be operated as an option
as a separate register with its own setpoint, or an additional register can be inte-
grated into the temperature control sequence.
The cooling register is forced off if:
– Night unoccupied (temperaturstart) heating
– Summer night cooling
The stages are controlled as follows for direct expansion evaporators:
DO1 DO2
Off
0 0
Stage1
1 0
Stage2
0 1
Stage3
1 1
Prerequisite
Enable cooling register
Configuration
Function
Stage control
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 79

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