CIAT VECTIOS POWER IPJ Series, Инструкция по эксплуатации

Страница: 43 / 60

VECTIOS
POWER TM
PJ EN-43
12 - FACTORY OPTIONS AND ACCESSORIES
●
Air/gas premixing operation:
The PCH heater is fitted with a burner that completely
premixes air and gas. The air/gas mixing occurs inside the
impeller on the motor-fan.
The air taken into the impeller through the venturi tube,
calibrated, creates a vacuum. The vacuum in the venturi is
rebalanced by the gas valve, which is pneumatically controlled.
The air pressure - gas pressure ratio is 1:1. This ratio can be
corrected by turning the o
ff
set adjustment screw (on the gas
valve). The heater is supplied with the o
ff
set regulated and
the screw sealed.
A second adjustment can be done with the screw on the
venturi, which regulates the value of maximum gas capacity
and determines the amount of carbon dioxide (CO
2
) in the
fl
ue gases.
This adjustment is also made at the factory. The screw is not
sealed to permit conversion to another type of gas, if desired.
The modulation PCB, mounted on the heater, manages the
motor rotation (in c.c.) depending on the heating capacity
required by the environment. Varying the rotation speed of
the motor changes the air
fl
ow capacity and therefore also the
gas
fl
ow capacity. Minimum and maximum rotation values of
the fan are programmed into the PCB and cannot be modi
fi
ed
by the user or installer.
Control of the gas burner
Important: All the connections to be established by
the client are featured on the wiring diagram included
with the unit.
●
Unit electronic control:
The Vectic control has a proportional output 0/10V (Y2) where
a natural gas or propane gas proportional actuator can be
connected.
The burner connection is managed by the control, in HEATING
mode, through an ON/OFF signal of the digital output NO5
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 strati
fi
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
●
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 PJ unit must be connected to the connection box
“BOX8-QUE” that is located inside of the PJ unit (please
consult the paragraph “Electrical connection of the burner”.
CPU PCB LCD
Connector Burner Fan Modulation
ON/OFF Connector
ALARM Connector
NTC1 Connector
0-10Vdc Connector
Connector Burner
Fan Power Supply
Connector Electrical
Power Supply 230 Vac
Equipment PCB
CPU-SMART PCB
Modbus Connector
Detail of CPU-SMART PCB board
CPU-SMART PCB
burner control
Supply fan
Switch on signal
J13 - NO5
(Vectic control)
Connector M1 Connector M2
230 - I - 50Hz
47
48 49
40 41 42 43 44 45
W48-QUE W49-QUE
comfort.
The gas burner integrates its own control. The Vectic control
only receives a safety signal from the burner in the event of
failure (digital input DI5). This signal only indicates the failure.
●
Fxx faults:
The modulation PCB can distinguish between 30 di
ff
erent
types of faults. This ensures accurate diagnostics. Also, codes
and possible causes of faults are listed in this manual.
For more serious faults that require a manual reset, use the
LCD display to reset the CPU PCB on the machine by pressing
the arrows at the same time.