Hitachi RWM-(H)FSN3E, Service Manual

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5 Control system
SMGB0070 rev. 1 - 08/2011
127
5
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Space cooling
Water circuit configuration
N O T E
The air to water heat pump is pre-configurated to work only in heating mode. In order to allow the cooling mode, it
is necessary to perform a dip-switch setting and install the drain pan accessory. In the case, all the cooling mode
uses for the unit will be permitted and the LCD user’s interface cooling configuration will appear.
In case of heating istallation working also in cooling operation, the responsability of correct system functioning
will be of the installer.
The configuration examples given below are only for illustration purposes.
• Main cooling configuration
Configuration 1: Direct Circuit
Low temperature
(5~12 ºC)
Medium tempera-
ture (16~21 ºC)
Aux Heater
Plate HEX
Exp vessel
The unit is connectable to only one circuit demand, either low temperature (i.e., fan coils) or medium temperature (refres-
hing floor).
In addition, the unit can be combined with Sanitary tank (with solar kit extension) and with swimming pool.
Water temperature target depends on actual water outlet temperature and calculations by outside temperature compensa-
tion (for refreshing floor application) or a fixed water temperature setting (fan coils cooling).