Carrier 30AWH004HB User Manual

59
30AW
Control management
5
Dehumidier activation (X and H terminal block pins 11 – N)
Compressor Short Cycling Protection (Timeguard)
Minimum Compressor Run Time
Water Freeze Protection
External dehumidier source is based on NUI Relative Humidity value, (For this feature is necessary install 33AW-CS1
interface).
Two codes shall be accesses through NUI:
Code 108:
It is for dening availability of external dehumidier.
1 = Alarm or Defrost
2 = External Dehumidier activation
Code 107:
- It is Relative Humidity Limit value to activate the heat source.
- If Relative Humidity is higher than Humidity Limit, Output PINS 11-N must be forced ON and display dry mode icon on
NUI.
0VUQVUTIPVMECFGPSDFE0''XIFO3FMBUJWF)VNJEJUZJTMFTTUIBOTFMFDUFEWBMVF
Protections are activated based on operative Mode.
NUI code 108
and 107
'PSSFMJBCJMJUZQVSQPTFTXIFOUIFDPNQSFTTPSHPFTGSPN0OUP0òJUNVTUSFNBJOPòGPSBNJOJNVNPGNJOVUFTBOE
seconds. During that time F(n) = 0, and a Cool Satised or Heat Satised message is sent to the Unit depending on the
mode.
5PBWPJETIPSUBOEGSFRVFOUPOPòDZDMFTUIFDPOUSPMBMHPSJUINXJMMBWPJEVOJUUVSOJOHPOVOUJMNJOVUFTIBWFFMBQTFEJG
last on cycle was shorter than 10 minutes. (The maximum number of cycles for hours is six).
8IFOUIFDPNQSFTTPSJTSFBEZUPUVSOPOBSBOEPNEFMBZPGoTFDPOETIPMETUIFDPNQSFTTPSPò
Water Pump remains always ON during Timeguard.
For reliability purposes this algorithm forces the compressor to run for a minimum amount of time.
0ODFUIFDPNQSFTTPSJTSVOOJOHJUNVTUSVOGPSBNJOJNVNPGNJOVUFTCFGPSFTXJUDIJOHPò
This protection is ignored when:
"EJBHOPTUJDGPSDFTUIFDPNQSFTTPSPò
6TFSSFRVFTUTUIFVOJUUPUVSOPò
- A/C Power Interruption
- A mode change occurs
- 20 second loss of high voltage communications
- High temperature protection
When the water starts gets too cold, there is the risk of freezing in the heat exchanger.
Certain actions are taken to prevent freezing.
This protection starts if TR or Tw go down particular values as per conditions below.
While in Zone N or H the frequency can’t increase.
While in Zone M the frequency is forced to decrease until Fcmin.
#FMPX[POF.UVSOPòUIFDPNQSFTTPSBOETFUNPEF0''
Tw:
Min(Actual
Water
Temperature
Entering,
Actual Water
Temperature
Exiting)
Fr(n):
real frequency
from the Unit
Fcmin:
minimum
compressor
speed allowed
in cooling
TR:
Refrigerant
temperature
Compressor OFF
M
N
H
4 °C
2 °C
5 °C
Tw
-5 °C
-7 °C
-3 °C
TR
SM_30AW.indd 59 14-03-2011 14:45:06

Carrier 30AWH004HB Specifications

General

Brand	Carrier
Model	30AWH004HB
Category	Air Conditioner
Language	English