Siemens Climatix Series Basis Document page 70

Note
Parameter
Parameter
Controller
Output signal
Pump / cmd
Alarm
Frost monitor
Frost protection
Frost protect press
Efficiency
Start up time
Start up tmp
Max speed defrost
Startup behavior
Funktion Cooling
recovery
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Basis Document Siemens Climatix Control System
Siemens
Page 70
BDCX.100820.01GB
Building Technologies
Heat recovery is forced off if:
– Night unoccupied (temperaturstart) cool
– Summer night cooling
– Firemode with running fan
• Pump can also be used as a command for wheel.
• Frost sensor with wheel or plate activate an exhaust sensor. Frost sensor with
water activate a water sensor. The exhaust sensor can also be used for
efficiency.
Master Index > Unit > Temperature Control > Heat recovery
Range
0...100 [%]
0...100 [%]
– Off
– On
– Ok
– Alarm
– Ok
– Frost.
– 0...100%
---
0...100%
0...600 [s]
–64.0...64.0 [°C]
0...100%
The startup time for the output is set to 100% if the outside air temperature < Start
up tmp. Afterwards, the controller determines the present position.
If heat demand exists at startup, the heating register is started in parallel, and after
successful startup, the controller for heat recovery deploys to the maximum allow-
able position (100%).
Cooling recovery starts, when the following conditions are met:
– Outside air temperature > room temperature + 2K
and
– Room temperature > room setpoint + 1K
Cooling recovery stops for the following cases:
– Outside air temperature <= Room temperature
or
– Room temperature >= room setpoint.
For pure supply air control, the room setpoint test is disabled and then only the
outside air temperature-room temperature condition is considered.
Standard application AHU
Functions
Function
Present value for the heat exchanger controller. Go
to controller settings page.
Present value for analog output. Go to page with all
analog output settings.
Current pump status. Go to heat recovery pump
page.
Alarm state for heat recovery. Go to page with digi-
tal input settings. For example, you can set the time
for jitter protection (Default: 0 s).
Present state of frost detector. Go to page with digi-
tal input settings.
The output limited for DeFrost MaxSpeed for "Frost"
state. The plant is shut down after 20 minutes and
an alarm is triggered.
Present value for the frost controller. Go to Hrec
frost protect page to parameterize frost control.
Go to pressure frost page to parameterize frost con-
trol.
Present value of heat recovery efficiency. Go to
page with settings for heat recovery efficiency.
Time for controller start behavior.
Temperature limit for start behavior.
Maximum allowable output value for frost detection.
CE1P3977en_02
01.02.2010