Carrier 30AWH004HB User Manual

62
30AW
Control management
5
Backup External Heat Source functionality (X and H terminal block pins 5 – N)
This functionality is valid when user mode is HEATING MODE.
Between pins 5 and N of terminal strip (see paragraph 4.1) an output is available (1 ph ~ 230V, 2A max) to activate a
backup external heat source (such as Electric Heater or Boiler).
This functions is activates using the NUI.
NUI Codes for this function:
106: 1 for External heat source (2 for Defrost Output)
148: OAT limit for External heat source (-20°C / +65°C)
150: Auxiliary OAT limit. This code is dening the EHS threshold value under witch both HP and EHS will be operative as
per algorithm. (-20°C / +30°C)
151: Auxiliary Delay. Delay time before switching the back-up EHS ON min. (1 min / 60 min)
152: Auxiliary Hysteresis. Delta T needed to activate the Auxiliary Heater. (1°C / 20°C)
153: SHW in OFF MODE. This code is dening if, when System mode is OFF, the SHW logic can be activated.
154: EHS OUTPUT. This code is dening the EHS output status when EHS is activated and OAT<Code 148
155: Main water pump vs EHS OAT. This code is dening the water pump logic when EHS is activated and OAT<Code 148
156: Additional WP vs SHW (0 Trace heater Output active)
157: Additional WP ( X and H terminal block pins 12 – N)
If code 148 < OAT < code 150:
When LWT is below the water set-point minus the auxiliary hysteresis (code 152) starts the EHS timer (A). When the set delay
(code 151) is passed (B) the External Heat Source turns ON and the HP is regulated at the max frequency. The EHS turns
OFF when the LWT reached the water temperature set point (C) (EHS timer is set to 0). The additional water pump will be
activated depending by main water pump (always ON if main water pump is ON) and by the code 156 (ON or OFF as per SHW
activation).
If OAT < code 148:
The HP turns OFF (frost protection is active)
The EHS turns ON/OFF depending by setting of the code 154 (Always ON, Based on Room temperature or Water
Temperature).
The main water pump activation depending by the code 155 (always ON, always OFF or depending by EHS status)
The auxiliary water pump activation depending by the code 157 (always ON, always OFF or depending by EHS status)
NOTE:
*ODBTFPG4)8BDUJWBUJPOQJOTDMPTFEIFBUQVNQXJMMUVSOPOBOECBDLVQIFBUFSXJMMUVSOPò5IJTXJMMIBQQFOJOCPUI
the above strategies based on OAT value.
In case of EHS installation it is mandatory to install a thermal switch on the water circuit to protect the system from too high
water temperatures. This protection item has to be located Immediately downsteam the EHS (according to local/national
legislations).
SHW: Sanitary Hot
Water
EHS: External Heat
Source
HP: Heat Pump
OAT: Outdoor Air
Temperature
WP: Water Pump
NUI Codes
106, 148,
150, 151,
152, 153,
154, 155,
156, 157
OAT < T set in CODE 148
ABC
Water Temperature Set-point
Indoor Temperature Set Point
ON
OFF
OFF OFF OFF
CODE 151
0=Always ON
1=
O
N
/O
FF based
on room T
OFF ON OFF ON
2=
O
N
/O
FF based
on WSP
ON OFF ON OFF
ON OFF OFF
0=Always OFF
1=
O
N
/O
FF based
on EHS ON/OFF
2=Always ON
0=Always OFF
1
=
ON/OFF
b
ase
d
on EHS ON/OFF
2=Always ON
E
152 Auxiliary Hys
t
HP System mode OFF ON
Frost protection ON OFF
EHS timer OFF ON
AUX Delay
EHS OUTPUT
CODE 154
ON
OFF ON OFF OFF
OFF
As per standard logic
Depending by EHS ON/OFF
ON
T set in CODE 148 < OAT < T set in CODE 148
ADDITIONAL
WATER PUMP
CODE 157
OFF
Depending on main water pump or, when SHW is active, by CODE 156
De
p
endin
g
b
y
EHS ON/OFF
ON
Max Frequency OFF OFF
MAIN WATER
PUMP CODE
155
SM_30AW.indd 62 14-03-2011 14:45:09

Carrier 30AWH004HB Specifications

General

Brand	Carrier
Model	30AWH004HB
Category	Air Conditioner
Language	English