Gattetti LCA User Manual page 28

Water chillers and heat pumps
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H5: Operating logic of the Pump
It sets the operating logic of the water circulation pump . The pump can be disabled, always ON or ON upon a call from the
regulator (in this case the pump will be the first device to start, followed by the compressors). With disabled pump the flow
switch alarm will not be present although the Pump Relay will be normally activated.
H6: Cooling/Heating digital input
This parameter enables the Cooling/Heating selection from digital input. If enabled, this function is prior to any keyboard
command (the Cooling/Heating command on the keyboard is disabled). With enabled selection (H6=1), the "open" status
forces the unit to function in Cooling mode.
H7: ON/OFF digital input
This parameter enables the ON/OFF selection from digital input. If enabled, this function is prior to any keyboard
command. With enabled selection (H7=1), the "open" status forces the unit to switch OFF.
H8: Number of terminals
It indicates the number of terminals connected to the unit (max. 2).
H9: Lock of direct parameters modification
This parameter allows to disable the procedure through which can modify DIRECT and USER parameters through
keyboard or through remote control. In this way you will be able to display the parameter but not to modify them. The
following functions will also be disabled: Cooling/Heating selection, forced defrosting and timers reset.
The table below shows how to set the parameter:
Value
Remote control
enabled
0
enabled
1(default)
disabled
2
disabled
3
HA: Serial address
It indicates the address of the instrument used to carry out serial connection by means of the RS485 serial board to a
supervisory and/or telemaintenance computer.
Hb: Remote control unit password
This parameter indicates the address of the instrument for the data transmission via remote control; if several units are
placed within the effective range of the remote control, the modified parameters can be transmitted, in facts,
simultaneously to all the units or only to a specific unit. If the password value is 00, transmission is immediate; any value
different from 0 implies that the user will have to type that number on the remote control as access code any time he
programs the unit.
RG66000889-REV.OO
Keyboard
disabled
enabled
disabled
enabled
28

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