Table of Contents
Advertisement
12 - FACTORY OPTIONS AND ACCESSORIES
It is possible to select three operating modes for the burner:
- Operation of the burner as one or two electrical heater stages
(both option not compatible).
- Operation instead of the compressors.
- Operation instead of the compressors if the outdoor
temperature is lower than the value set (5ºC by default).
When the return temperature drops below the value set for the
burner connection the burner will start to operate. The control
of the power is carried out in accordance with the temperatures
of the supply air and return air. The control compares both
temperatures. If the supply temperature is excessively high,
the control limits the power supplied by the burner despite the
demand. This comparison avoids the stratifi cation of the hot
air masses and keeps the supply temperature below the safety
value (55ºC by default), which stops the burner.
Moreover, the control compares the supply temperature and the
ambient temperature to improve the feeling of thermal comfort.
The gas burner integrates its own control. The "50FC" control
only receives a safety signal from the burner in the event of
failure (digital input DI5). This signal only indicates the failure.
■ Burner control:
W48-QUE
Switch on signal
J13 - NO5
(control "50FC")
Supply fan
47
49
48
Connector M2
CPU-SMART PCB
burner control
The gas burner integrates its own CPU-SMART PCB board that
manages the operation and the safety devices.
The cables "W48-QUE" and "W49-QUE" with the wires required
for the connection of the CPU-SMART PCB board with the
50FF/FC unit must be connected to the connection box "BOX8-
QUE" that is located inside of the 50FF/FC unit (please consult
the paragraph "Electrical connection of the burner".
Detail of CPU-SMART PCB board
62
W49-QUE
45
44
43
42
41
Connector M1
230 - I - 50Hz
■ Burner protection for low outdoor temperatures (optional)
With outdoor temperatures below
-14ºC WB, a protection kit for low
temperature is available.
The kit is composed of a 55W electrical
heater and a NTC probe.
The burner control manages the
electrical heater to maintain a constant
temperature inside the burner housing
higher than + 1° C.
■ Interface panel:
Each PCH heater is fi tted as standard
with a multifunction LCD panel located
inside the burner housing, which
is used to control, configure and
diagnose all operating parameters of
the equipment.
The instrument panel is fi tted with a red
3 digit LCD display and four function
keys: ↑ , ↓ , ESC and ENTER; the
display allows the user to display the
heater operating mode and its faults.
It allows our service centre to change
the main operating parameters.
Changing parameters requires a password.
- Viewing the burner status:
The machine status is shown on the display by the following
wordings:
rdy: the machine is on without burner fl ame; it is waiting
for the ON control and/or the heat demand from the room
40
temperature monitoring system.
On: the machine is on with burner fl ame 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 "operation ON";
Fxx: Fault detected.
During normal operation, the display will show the writing On
if the burner is on; rdy when the heater is being switched off
or the room temperature has been reached.
Air when the EST function in the menu FUN was selected by
mistake; modify FUN to ON or OFF.
In the event of communication problems between the CPU-
SMART PCB of the burner and the LCD panel, the word CPU
will fl ash on the display if the problem is caused by the CPU;
three fl ashing 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.
- Navegating the menu:
The menu has three levels. The fi srt is visible without entering
a password, the second and third require using second and
third level passwords.
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
confi rm the change by pressing ENTER. To exit the parameter
or menu, press ESC. If you exit the programming function,
after about 10 minutes the program will exit the menu and
go back to the "machine status" view.
To change the parameter, press the arrow keys: pressing ↑
(up arrow) increases the parameter by 1, pressing ↓ (down
arrow) reduces it by 1. Pressing both arrow keys for at least
three seconds increases the parameter scroll speed.
To confi rm a change in parameters, press ENTER for at least
3 seconds. The change in the parameter is signalled by a
fl ash of the display.
All submenus scroll from the bottom towards the top, and they
start over when the end of the menu is reached.
Advertisement
Table of Contents
