Features and technical data
Installation, use and maintenance manual – K18 Hybrigas
21
1
▶
Condensing boiler electronic board; it controls the boiler
and displays data, messages and operative codes related to
the boiler itself. The display is accessible from the left side of
the unit (detail G Figure 1.3
Figure 1.15
Boiler control panel
1
Heating temperature adjustment keys
2
INFO key: press once to view the temperatures and other informations - hold for 5 seconds, in off operating mode, to view the last 5 faults
3
Operating mode selection key: summer only / winter only / summer-winter / OFF
4
RESET key: faults reset - boiler module chimney sweep function activation (hold for 7 seconds)
5
Domestic hot water temperature adjustment keys / hold the keys at the same time for 5 seconds to activate display back lighting for 10 minutes
6
Display
5
1
6
2
3
4
1.7
OPERATION MODE
The functioning mode of the appliance is set on modulating by
default, that is the thermal power output is adapted to the ther-
mal load.
For any modifications contact the installer or the TAC.
1.8
CONTROLS
Control device
The appliance may only work if it is connected to a control de-
vice, selected from:
▶
(1) OQLT019 system controller (optional)
▶
(2) OCDS007 ambient chronothermostat (optional)
▶
(3) external request
1.8.1
Control system (1) with OQLT019
The OQLT019 controller is able to control one K18 Hybrigas unit,
one or more heating circuits and DHW production.
OQLT019 system controller
The main functions are:
▶
control of one K18 Hybrigas unit with variable water setpoint
according to heating curves and type of DHW function;
▶
room comfort control by controlling two heating circuits, of
which one optionally of mixed type, or zone valve control;
control based on heating curves (one for each circuit) and
optionally influence by the installed room unit/s;
▶
buffer tank DHW production control (in dedicated prepara-
tion tank);
▶
parameter figures display and setting;
▶
hourly programming on a weekly basis on two temperature
levels (comfort, reduced);
▶
Anti-icing protection function
▶
absence periods programming;
▶
diagnostics;
▶
reset errors.
For additional details and diagrams see OQLT019 controller
manual.
Using the optional ODSP030 expansion kit it is possible
manage up to three heating circuits, of which up to two
optionally mixed.
1.8.2
Control system (2) with OCDS007
The OCDS007 chronothermostat is able to control a single
K18 Hybrigas unit. In this case the water setpoint is either fixed
or based on weather compensation, with a single heating curve
which is directly controlled by the K18 Hybrigas unit; as such, it
can not be modified from the OCDS007 device.
OCDS007 ambient chronothermostat
The main functions are:
▶
room timer thermostat for hourly programming on a weekly
basis on various levels of room temperature;
▶
interfacing with the K18 Hybrigas unit through voltage-free
request contact;
▶
reporting on the display of the device of the possible alarm
status of the K18 Hybrigas unit.
For further information refer to OCDS007 manual.
1.8.3
Control system (3) with external request
The appliance may also be controlled via generic enable de-
vices (e.g. thermostats, timer, buttons, contactors...) fitted with