Normal operation
Installation, use and maintenance manual – K18 Simplygas
45
6
to the relevant manual.
▶
If the appliance is controlled by OCDS007 programmable
thermostat or by external request (e.g. thermostat, timer,
switch, ... with voltage-free NO contact), the appliance is
switched on/off by the ON/OFF positions of the external
control device.
After switching on with the control, in normal operating condi-
tions, the appliance starts/stops automatically according to the
user's thermal needs, supplying hot water at the programmed
temperature.
Although the external request is in the "ON" position, this
does not mean the appliance will start immediately, but
it will only start when there are actual service demands.
6.3
SWITCH ON AND OFF (DHW SERVICE)
Do not switch on/off with the power supply switch
Do not switch the appliance on/off with the power sup-
ply switch. This may be harmful and dangerous for the
appliance and for the system.
Checks before switching on
Before switching on the appliance, ensue that:
gas valve open
appliance electrical power supply (main switch GS ON,
Figure 4.2
OQLT021 or external timer power supply (if present)
water circuit ready and filled
6.3.1
How to activate/deactivate the DHW service
request
▶
If DHW production is managed by the OQLT021 controller,
refer to the relevant manual.
▶
If the K18 appliance directly manages DHW production,
the appliance is switched on/off according to the temper-
ature measured by the GHP'' probe in the DHW buffer tank
and to the parameters set on the K18 appliance (Paragraph
5.4.1
In normal operating conditions, the appliance starts/stops auto-
matically according to the DHW buffer tank thermal needs, sup-
plying hot water at the programmed temperature.
6.4
MESSAGES ON THE DISPLAY
6.4.1
4 digit display
The GHP10/GHP11 board of the appliance (Paragraph
1.5
p. 16) is equipped with a 4-digit display (detail A Figure
1.9
p. 16), visible through the sight glass (reference I Figure
1.3
▶
When the appliance is powered, all the LEDs switch on for 3
sec, then the central hyphens of the four digits are switched
on, and lastly the GHP10/GHP11 board name is displayed in
two subsequent stages (GHP during the first stage and 10/11
during the second).
▶
After 5 sec, the appliance is ready to operate.
6.4.2
Signals in normal operation
▶
During normal operation, water temperature values alter-
nate on the display: output, input and the difference be-
tween the two.
6.4.3
Events reporting
When they occur, the display of the GHP10/GHP11 board shows
three types of events, recognizable by the first character:
▶
"I" for information
▶
"u" for warning
▶
"E" for errors
The other three red digits represent a numeric event code.
Info events are shown steadily while warnings and errors blink.
The display rotates after the values of the outlet water tempera-
ture, the inlet and the difference between them.
If multiple events are active, they are shown in sequence, or-
dered by increasing code number.
If warning or error events are active, the left green symbol,
shown together with water temperature data, blinks.
If it is a permanent error or warning the appliance stops.
For details about information, errors and warnings codes see
6.4.4
Menu navigation
Once the menu list has been accessed (see Paragraph
p. 45), the display shows:
▶
First green digit on the left indicates menu number (eg. "0.",
"1.", "2.", ... "8.").
▶
The last three red digits on the right indicate a parameter
code or value, among those included in the selected menu
(e.g. "__6" "_20", "161").
(e.g. menu+parameter "1.__6", "2._20", "3.161").
6.5
ON-BOARD ELECTRONIC CONTROLS
– MENUS AND PARAMETERS OF THE
GHP10/GHP11 BOARD
6.5.1
Selection keys
One of the following actions may be done with the GHP10/
GHP11 board selection keys (references B, C and D in Figure
p. 16):
▶
Enter the menu list (by pressing the
key the first time).
▶
Scroll the menu list, or a series of parameters in a menu (by
pressing keys
,
).
▶
Select a menu or a parameter (pressing the key
).
▶
Edit and confirm the setting of a parameter (pressing keys
and
and confirming with key
).
▶
Execute a command (pressing key
).
▶
Exit a menu and go back to the higher level by selecting the
letter "E" which is displayed at the end of the menu list or of
a series of parameters in a menu.
The letter "E" is displayed at the end a menu parameters list, and
indicates the exit to go back to the higher level by pressing
.
6.5.2
Menus and parameters
The menus may be display only (functional data or parameters),
display and setting (parameters) or control (reset).
▶
Display menus: menu "0" and menu "1".
▶
Command menu: menu "2" to execute error reset command
(Paragraph 6.7
▶
Visualization and setting menu (for the user): menu "3" to
display or set certain system parameters (eg. water temper-
ature setpoint); the settings are initialised by the TAC up-
on first start-up; the Table 6.1
p. 46 shows parameters in
menu 3.
▶
Visualization and setting menu (to be exclusively used by
the installer and TAC): menu "4." (for the installer) "5." and "6."
(for the TAC). They are password protected. These are spe-
cific sections, exclusively intended for qualified personnel
