Carrier 30XW - Operation of Two Units in Master;Slave Mode; 8 Heat Machine Units 30 Xwh- and 30 Xwhp; Physical Data for Heat Machine Units; Electrical Data for Heat Machine Units

23

1 Master unit
2 Slave unit
 Controlboxesofthemasterandslaveunits
Water inlet
Water outlet
Water pumps for each unit (included as standard for units with hydraulic
module)
 Additionalsensorsforleavingwatercontrol,tobeconnectedtochannel1
oftheslaveboardsofeachmasterandslaveunit
 CCNcommunicationbus
Connection of two additional sensors

The control of a master/slave assembly is in the entering
water and does not require any additional sensors (standard
conguration). It can also be located in the leaving water.
In this case two additional sensors must be added on the
common piping.
All parameters, required for the master/slave function must
be congured using the MST_SLV menu.
All remote controls of the master/slave assembly (start/
stop, set point, load shedding etc.) are controlled by the
unit con-gured as master and must only be applied to the
master unit.
Each unit controls its own water pump. If there is only one
common pump, in cases with variable ow, isolation valves
must be installed on each unit. They will be activated at the
opening and closing by the control of each unit (in this case
the valves are controlled using the dedicated water pump
outputs). See the 30XA/30XW Pro-Dialog Control IOM
for a more detailed explanation.



The physical data for the Heat Machine units 30XWH-/
30XWHP are the same as for the 30XW--/30XW-P units.
Please refer to chapter 4.1.

The electrical data for the Heat Machine units 30XWH-/
30XWHP are the same as for the 30XW--/30XW-P units.
Please refer to chapter 4.2.


The dimensions and clearances are the same as for the
30XW--/30XW-P units. Please refer to chapter 3.

The operating limits are the same as for the 30XW--/30XW-P
units. Please refer to chapter 6.1.

8.5.1 - Cooling mode
This operating mode is the same as that for 30XW units.
The unit controls on the cooling setpoint.
8.5.2 - Heating mode
Unlike in the cooling mode, the unit uses the heating
setpoint in this conguration. The evaporator leaving water
control (lowest setpoint taken into consideration) is still
maintained to prevent operation at very low temperatures.
2
1