17
code HG0141.00GB ed.A-2008
LRP - RAPID PRO and LK - KONDENSA
LRP and LK WARM AIR HEATER
4.
USER'S INSTRUCTIONS
4.1. Operating Cycle
The wall mounted LRP and LK heaters operation is fully au-
tomatic; they are equipped with electronic equipment with self
check facility that manages all the burner control and monitoring
operations and with a microprocessor based electronic PCB
that controls the heat output regulation.
The heat demand depends on the parameter d0 setting of the
heater PCB:
•
d0=2: input ID2-IDC2 closed and NTC1<ST1;
•
d0=5: input ID2-IDC2 closed and input 0-10Vdc>Von;
•
d0=7: input ID2-IDC2 closed and control from Modbus ON.
The boiler is switched on when the following two conditions
are met:
•
the heater is powered on and has not been locked out;
•
when the contact is closed on terminals ID2/IDC2 of the
heater PCB.
In these conditions the burner fan will be immediately started;
after pre-cleaning time has elapsed, the flame will light up with
an ignition power equal to approximately 30% of its maximum
output. Once the flame stabilising time has expired, the burner
will start to modulate its heat output according to the supply air
temperature.
If there is no flame during the ignition phase, the heater will
make other 4 ignition attempts; at the fifth attempt, if ignition is
not successful, the heater will be locked out.
The heater will be switched off when the ID2/IDC2 contact
opens on the terminal box; disconnecting the power supply is
prohibited, except for emergencies because, when the heater
is switched off, the fume extractor fan will continue to work for
approximately 90 seconds to clean up the combustion chamber
(combustion chamber post-cleaning phase).
Failure to perform the post-cooling operations on the exchanger
will cause:
•
a shorter lifetime of the exchanger and the guarantee will
be null and void;
•
the safety thermostat to operate and the associated re-
quirement to manually reset the heater.
If, during the cooling cycle, there is a new demand for heat, the
modulation PCB will wait for the cooling fans to shut down and
then reset the counters and start a new cycle.
Parameter
d6
of the modulation PCB, which can be programmed
from 0 to 256 seconds, controls the minimum interval between
the time the equipment is switched off and restarted.
IMPORTANT: P
owering off the machine before complet
-
ing the cooling cycle and/or with machine set to ON is
strictly prohibited. Failure to follow these instructions
shall invalidate the warranty and cause early deterioration
of the heat exchanger.
4.2. Interface Panel
The LRP and LK heaters are fitted as standard with a multifunction
LCD panel located on the front panel of the suspended heater,
which is used to control, configure and diagnose all operating
parameters of the equipment.
This panel cannot be remotely controlled.
The panel is fitted with a red 3-digit LCD display and with four
function keys: ↑ , ↓ , ESC and
ENTER; the display allows the
user to display the heater operating mode and its Faults.
It also allows the service centre to change the main operating
parameters.
Changing parameters requires a password.
Viewing the machine status
The machine status is shown on the display by the following
wordings:
rdy
the machine is on without burner flame,
it is waiting for the ON control and/or the heat demand
from the thermostat;
On
the machine is on with burner flame or is in the ignition
phase;
OFF
the machine is turned off by the control on the LCD.
Any heat demands will be ignored.
To light the burner, the LCD must show the wording
"heater ON";
Fxx
Fault detected.
During normal operation, the display will show the wording
On
if the burner is on;
rdy
when the boiler is being switched off or
the room temperature has been reached.
Air
the EST operation has been selected under the
FUN menu; set FUN to ON or OFF;
Axx
LRP or LK heater address;
If the heater has an address other than Ø, the display
will show, alternating it with the operation in progress,
the address assigned to the heater.
In the event of communication problems between CPU-SMART
PCB and LCD panel, the word
CPU
will flash on the display if
the problem is caused by the CPU; three flashing dots will be
displayed if the problem is caused by the display PCB. If needs
be, check that the display and the PCB are correctly connected
and that the small cable RJ11 is securely held in the connector.
Navigating the menu
The menu has three levels. The first is accessible without entering
a password, the second and third require entering second level
passwords to change the parameters.
If the LRP or LK heater PCB is connected to a Smart Web or
Easy, and therefore with an address different from Ø, all pa
-
rameters can be viewed and modified from the remote control.
The service centre requiring to work on such parameters must
enter the relevant level password.
Use the arrows to scroll the menus: ↑ (up arrow) and ↓ (down
arrow). Press ENTER to select the menu, and again to select the
parameter. Change the parameter with the arrows and confirm
the change by pressing ENTER.
To exit the parameter or menu, press ESC. If you exit the pro-
gramming function, after about 10 minutes the program will exit
the menu and go back to the "machine status" display.
To change the parameter, press the arrow keys: pressing ↑ (up
arrow) increases the parameter by 1, pressing ↓ (down arrow)
reduces it by 1. When the arrows keys are pressed for at least
three seconds, the parameter scrolling speed is increased.
