-
-
'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
2
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
2
heat pump water heater and external control panel before installing.
2
heat pump water heater installation manual.
• Switch off the main power to the CO
2
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.
2. Connect the connector to the P CB of the CO
2
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 7-segment display.
Set value of 7-segment and functions are showed in the table on the right.
[Procedure for changing the external input function]
The procedure has been completed.
*1
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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