Rotex GasSolarUnit Series Installation And Maintenance Instructions Manual page 11

Pos.32: ROTEX 23R control unit
The control unit operation and functions are
detailed in the separate ROTEX control unit
manual.
Pos. 33: Heating pressure gauge
Pressure gauge for regulating the system
pressure. The pressure must me indicated in
the green range of the display (generally
between 1.5 and 2.5 bar). Top up with water
when the system pressure is too low (for a
description, see pos. 37).
Pos. 34, 35: Silencer hood
The hood should always be fitted during
operation. It is secured with two screws (pos.
35) on the l.h. and r.h. side of the cylinder lid.
Clean with luke-warm water, solvent-free
domestic cleaning agent and a soft cloth.
Never use scouring agents or solvents.
Remove only for maintenance work (chapter 6).
Pos.36: Air supply hose
Combustion air from the annular gap of the
concentric balanced flue pipe is channelled to
the burner via the air supply hose.
Pos. 37: Boiler fill & drain valve for filling
and draining
Topping up the heating system (if the system
pressure is too low): Connect the filling hose
and top up the system, until the pressure
gauge indicates in the upper part of the green
range (generally 2.0 to 2.5 bar).
Pos. 38: Automatic air vent valve
Open the screw cap to vent the GSU/GCU.
This air vent valve is generally insufficient to
vent the entire heating system.
Pos. 39: Ball shut-off valve
During operation, the shut-off valves must
remain open (handle turned in line with the
pipe run).
Shut them only to carry out work on the
system (handle turned 90° to the pipe run).
Pos. 40: Thermal insulation shell for the
boiler body
To minimise the radiation and standby losses
of the GSU/GCU. For removal, first remove the
burner and all connection lines.
Pos. 41: Type plate
Shows the most important performance details
and parameters of the GSU/GCU as well as
the serial number of the equipment, that
should always be quoted when referring any
questions to ROTEX.
Pos. 42: Electronic level probe
The cylinder fill level is monitored via the three
electrodes of the level probe and indicated by
control indicators on the user interface. The
burner will be locked out if the level in the
cylinder is too low.
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