Carrier 30AWH004HB User Manual

60
30AW
Control management
5
High Temperature Protection
Anti frost protection
A/C Power Interruption
Envelope Limitation Protection
When the water starts to get to hot, this is a sign that the pressure in the system is increasing.
Certain actions are taken to decrease the pressure.
While in Zone N or L the frequency can’t increase.
While in Zone M the frequency is forced to decrease until Fcmin.
*G5XŻPS5Sƥ¡$UIFOUVSOPòUIFDPNQSFTTPSBOETFU'
Tw:
Max(Actual
Water
Temperature
Entering,
Actual Water
Temperature
Exiting)
Tr: Actual
Refrigerant
Temperature
Fr(n):
real frequency
from the chiller
unit
Fhmin:
minimum
compressor
speed allowed
in heating
This function shall run when the unit is manually stopped or shutdown due to alarm. It shall protect the water exchanger
against freezing risk because of low outside temperature conditions.
The following logic shall be used:
EJòFSFOUGBMMEPXOUISFTIPMEMJNJUTIBWFCFFOCFEFöOFEUPTFRVFOUJBMMZQPXFS0O
o Trace Heater (rst intervention) (when installed).
o Water Pump (second intervention)
P6OJU0OJO)FBU.PEFBOE5)0ò
EJòFSFOUSJTFVQUISFTIPMEMJNJUTIBWFCFFOEFöOFEUPTFRVFOUJBMMZ1PXFS0ò
P6OJU0òBOE5)0O
P8BUFS1VNQ0ò
P5SBDFIFBUFS0ò
DELTA SP: NUI CODE
109
WP: Water Pump
TH: Trace heater
HP: Heat Pump
OAT: Outdoor Air
Temperature
EWT: Enter Water
Temperature
LWT: Leaving Water
Temperature
This algorithm handles the case of losing A/C line cycles.
*GUIF"$XBWFGPSNJTMPTUGPSNJMMJTFDPOETGPSDFUIFDPNQSFTTPSPòCZTFOEJOH'PSDFE0òTJHOBMUP6OJU5IFOTFOE
cool satised or heat satised until time guard expires.
This function limits frequency based on a combination of OAT and LWT, in order to guarantee the unit envelope. The
FOWFMPQFMJNJUTBSFEJòFSFOUGPSIFBUJOHBOEDPPMJOHNPEFBOEDIBOHFGSPNBTJ[FUPBOPUIFS
HEATING
-20 °C ≤OAT≤30 °C
20 °C≤LWT≤60 °C
COOLING
0 °C ≤ OAT ≤ 46 °C
4 °C ≤ LWT ≤ 18 °C
For more details see par 2.4 Operation Limits
When the OAT and/or LWT values are out of these limits the Aquasnap unit doesn’t stop but it works in particular
conditions in order to preserve the compressor (frequency and for uptime limitation).
OAT: Outdoor Air
Temperature
LWT: Leaving Water
Temperature
TH WP HP
Threshold A [(EWT or LWT < (DELTA SP + 4°C))] ON OFF OFF
Threshold B [(EWT or LWT < (DELTA SP + 3°C))] ON ON OFF
Threshold C [(EWT or LWT < (DELTA SP + 2°C )] OFF ON ON
Threshold D [(EWT and LWT > (DELTA SP + 5°C)] OFF OFF OFF
Compressor OFF
M
N L
61 °C
60 °C
62 °C
Tw
SM_30AW.indd 60 14-03-2011 14:45:07

Carrier 30AWH004HB Specifications

General

Brand	Carrier
Model	30AWH004HB
Category	Air Conditioner
Language	English