4
NORMAL OPERATION
Installation, user and maintenance manual – AY Condensing line, AY Series
13
4
NORMAL OPERATION
In this section you will find all the indications necessary for the activation, regulation and control of operation of the appliance via
the controller present in the electrical panel.
4�1
START UP (AND SHUT DOWN)
Efficient operation and long life of the appliance depend largely on its correct use!
Before activating the appliance, check that:
▶
the gas valve is open;
▶
the appliance is powered electrically: the general electrical switch (GS) must be in the «ON» position;
▶
the installation technician has ensured that the hydraulic circuit is supplied in the correct conditions.
If these conditions are satisfied, it is possible to proceed with activation.
If the appliance is not connected to a DDC, it may be activated and deactivated only by means of the on/off command provided by
the electrical installation technician.
According to requirements, this on/off command may be an on/off button, an ambient thermostat, a programmable timer, or one or
more voltage free contacts controlled by another process.
For details about the type of on/off command installed, contact the plant’s electrical installation technician.
Start up
Switch on the appliance by means of the on/off command (placing it in the "ON" position).
Shut down
Switch off the appliance via the on/off command (placing it in the "OFF" position).
The shutdown cycle takes approximately 3 minutes to complete.
The on/off command is essential! Do not switch the appliance on or off by connecting it to or disconnecting it from the
power supply directly, as this may be a source of danger and in any case damage the appliance or the plants connected to it.
If the appliance is connected to a DDC running in controller mode, the appliance is started up and controlled exclusively by
the DDC.
For instructions regarding the use of the DDC, refer to the two manuals supplied with it, and in particular: "Final user manual
- manual 2"
Visualising and clearing of operating codes
Operating codes can be generated by the controller or by the DDC.
The operating codes generated by the controller are visualised on its display and may also be visualised on the display of the DDC
(if fitted).
Operating codes generated by the controller can be reset with the controller itself or from the DDC (if fitted or where possible).
For a description of the operating codes generated by the electronic board and how to reset them, refer to the list of operat-
ing codes contained in Table 9.1
→
59.
The controller (see Figure 4.1
→
14) is located inside the electrical panel of the appliance and the display may be viewed
through the viewing hole on the front panel of the unit itself.
The Machine Codes generated by the DDC may only be viewed on the display of the DDC and may be cleared only through
the DDC.
Operating codes generated by the electronic board during the start-up of the appliance
If the appliance remains inactive for a prolonged period, it is possible that air is present in the gas pipes. In this case, activation fails
and the appliance reports the operating code: "u_12" - flame controller arrest (temporary) (see Paragraph 9.1
→
59) and after a brief
interval the appliance automatically launches the start up procedure again.
If code (u_12) is signalled 4 times on successive activation attempts, the code persists, the appliance locks out the flame controller
and displays the following operating code: "E_12" – flame controller arrest (see Paragraph 9.1
→
59). In this case reset is not automatic.
To restore operation of the appliance, carry out a reset of the flame control unit via menu 2 of the controller: the procedure is illus-
trated in Paragraph 4.3
→
15. After it is reset, the appliance will make a new attempt to activate.
If the appliance locks out several times, contact a Robur TAC by calling the
Technical Service Department
of Robur S.p.A. (tel.
+39.035.888111).
When activation is successful, the appliance is managed by the on-board controller (see following paragraph).
