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3.4.2 To fill the water circuit
1
Connect the water supply hose to the drain and fill valve.
2
Open the drain and fill valve.
3
Make sure that the automatic air purge valve is open (at least 2
turns).
INFORMATION
For location of the air purge valve, see Components: Indoor
unit in the Installer reference guide.
4
Fill the circuit with water until the manometer indicates a
pressure of ±2.0 bar.
5
Purge as much air as possible from the water circuit.
NOTICE
Air in the water circuit can cause malfunctioning of the
backup heater. During filling, it may not be possible to
remove all the air from the circuit. Remaining air will be
removed through the automatic air purge valves during
the initial operating hours of the system. Additional filling
with water afterwards may be required.
To purge the system, use the special function as
described in the chapter Commissioning. This function
should be used to purge the heat exchanger coil of the
domestic hot water tank.
6
Close the drain and fill valve.
7
Disconnect the water supply hose from the drain and fill valve.
3.4.3 To fill the domestic hot water tank
For installation instructions, see the installation manual of the
domestic hot water tank.
3.4.4 To insulate the water piping
The piping in the complete water circuit must be insulated to prevent
condensation during cooling operation and reduction of the heating
and cooling capacity.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, the thickness of the sealing materials should be at least
20 mm to prevent condensation on the surface of the sealing.
RHBH/X04+08+16CA
Rotex HPSU low temperature Bi-Bloc
4P330419-1A – 2012.11
3.5
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
Always use multicore cable for power supply cables.
3.5.1 About electrical compliance
See "3.5.4 To connect the backup heater power supply" on page 7.
3.5.2 To connect the electrical wiring on the
indoor unit
1
To open the indoor unit, see To open the indoor unit.
2
Wiring should enter the unit from the bottom.
3
Routing of the wiring inside the unit should be as follows:
For RHBH/X04+08:
a
a
c
c
For RHBH/X16:
a
a
INFORMATION
When installing field supply or option cables, foresee
sufficient cable length. This will make it possible to
remove/reposition the switch box and gain acces to other
components during service.
3 Installation
b
b
b
b
c
c
c
c
Installation manual
5
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