-
-
'15 • HM-T-246
(e) Other setting (Mandatory)
always on the P CB of hot water supply unit. This is normal.
(3) External input instructions installation manual
The instructions are used to control the operation of the CO
heat pump water heater from an external control panel.
Warning
•
Installation should be performed by a professional contractor.
•
Shut off the main power source of the CO
heat pump water heater and external control panel before installing.
heat pump water heater installation manual.
•
Switch off the main power to the CO
heat pump water heater and external control panel before working on the unit.
External input instructions
BROWN: Snow prevention fan control input (CNS3) BLUE: Start operation input (CNG1) WHITE: Pause input (CNG2)
Installation procedure
necessary to install a relay.
. Connect the connector to the P CB of the CO
heat pump water
heater.
Specifications of external input
E xternal input functions of factory default are showed in the table
on the right.
The external input is a no voltage contact input.
E xternal input functions can be changed by the following
procedure by setting of the -segment display.
Set value of -segment and functions are showed in the table on the right.
[Procedure for changing the external input function]
The procedure has been completed.
*
Demand control can be reduced as compresson of the units.
Extemal input
Function(factory default)
Code No/set value
CNS1
0 : All system stop input
P25 / 0~7
CNS2
1 : Demand input
P26 / 0~7
CNS3
2 : Snow prevention fan control input
P27 / 0~7
CNG1
3 : Start operation input
P28 / 0~7
CNG2
4 : Pause input
P29 / 0~7
Set value
Function
Open
Short
0
All system stop input (master)
Stop
Normal
1
Demand input (master)
*1
Enable
Disable
2
Snow prevention fan control input (master) Disable
Enable
3
Start operation input (master)
Normal Operation
4
Pause operation input (master)
Normal
Pause
Derate
SW4-5 SW4-6
80% (factory default) OFF
OFF
60%
ON
OFF
40%
OFF
ON
0%
ON
ON
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