19
code HG0141.00GB ed.A-2008
LRP - RAPID PRO and LK - KONDENSA
LRP and LK WARM AIR HEATER
HG0107.08_C2_005
HG140.00_IM_056
d0 parameter, which identifies the type of regulation associated
with the heater.
Function
d0 parameter
programming
Regulation mode
Modulation
Flame
d0=2
NTC1
d0=5
0-10Vdc
d0=7
Modbus
Safety thermostats
LRP and LK heaters are fitted with a safety thermostat with
automatic reset and positive safety setting. A safety operation of
this thermostat occurs when its sensitive component is broken.
The breaking of the sensitive element corresponds to a safety
intervention. When the thermostat clicks in, through the flame
monitoring equipment, the burner stops and the flame equip
-
ment is locked out.
The lockout of the unit, caused by the safety thermostat trigger-
ing, is indicated on the LCD display of the CPU PCB on board
the machine with F20 or F22.
The lockout is classified as "non-volatile" and requires a manual
reset.
Near the safety thermostat, there is an NTC1 probe set to the
value of the ST1 parameter, which reduces the burner's heat
output when the set point is reached, regardless of other input
signals. The probe monitors the heat output/cooling air flow ratio.
It is not advisable to change the ST1 value without consulting
the APEN GROUP Service Centre.
4.4. Adjustment
The LRP or LK heaters have three heat output regulation modes:
•
0-10 Vdc;
•
ModBus;
•
NTC1 temperature probe.
NOTE: The NTC1 probe is always active as a limit, even
with 0-10V and ModBus regulation modes.
To correctly set the regulation mode, it is necessary to program
4.5. Accessories
Ambient temperature adjustment
The LRP and LK heaters are supplied without remote control
and/or thermostat to regulate the room temperature as they can
operate with the most common remote controls available on the
market: APEN GROUP can supply several dedicated remote
controls that can be integrated as accessories.
Types of remote control:
•
ordinary remote control;
•
thermostat or chronothermostat;
•
Smart Web (code G27700) or Smart Easy (code G27500).
Instructions on how to operate the accessories can be found in
manuals supplied with the accessories.
Operation with ordinary remote control (OPTIONAL)
IT is possible to install an ordinary remote control with a voltage
free contact, across terminals ID2/IDC2 of the heater modulation
PCB; when the contact opens/closes, the heater switches on/off.
To simplify the heater operation, Apen Group can provide an
optional accessory (code G27800) that allows its operation
to be remotely controlled. The remote control G27800 allows
the user to switch the equipment on and off [0/I], to switch
between summer/winter, to receive a signal in case of lockout
and to operate the reset button.
ON/OFF switch
Heater
R e s e t
button
Summer-winter
switch
Operation with thermostat (OPTIONAL)
By connecting to the heater a thermostat with a voltage-free
contact between the ID2/IDC2 terminals of the heater modu-
lation PCB.
Apen Group can provide an optional thermostat (code G27400)
that allows to switch the heater on/off by means of room tem
-
perature control, during heating, and allows managing summer
ventilation and remote reset.
