Panel address
1
Control panel mounting, detaching, and wiring
VALLOX 252 D
MOUNTING OF CONTROL PANELS AND SENSORS
2
12
VALLOX electrical connections
• The unit is connected permanently to the distribution network. The connection box
is located inside the unit, next to the exhaust air duct outlet.
• The cables to be connected are led to the unit through the cable glands with
draught-limiters and the cable sleeves located beside the exhaust air duct outlet.
Mounting
• Detach the upper door of the unit (screw M8x70.5 pcs).
• Detach the cover of the connection box (screw 3.5x9.5, 2 pcs).
• Mount and connect the cables needed to the terminal block following the
connection instructions.
• The external wiring diagram is included in these instructions, and it is also found
inside the cover of the connection box.
• The internal wiring diagram is included in these instructions, and it is also found
on the cover of the fuse box inside the unit.
Control panel addresses
If two or more control panels are connected to the system, the addresses of the
control panels have to be changed. (See Section 1.3.9 in the instructions for use
and maintenance.)
For example 3 control panels.
• Connect the first control panel to the unit and change its address to 3.
• Connect the second control panel to the unit and change its address to 2.
• Connect the third control panel and check to see if its address is 1.
If control panels have the same address, they go to bus fault state. In this case, remove one of the
control panels and change the address of the other panel. The above mentioned situation can arise in
connection with the later installation of an additional control panel.
The control panel is wired directly from the VALLOX 252D connection box. The
control panel can also be wired serially with a CO
2
sensor or another control
panel (see the external electrical diagram, page 16).
ONLY AN AUTHORIZED PERSON MAY PERFORM
ELECTRICAL CONNECTIONS!
BEFORE CONNECTING THE CABLES, MAKE SURE
THAT THEY HAVE BEEN DISCONNECTED FROM THE
MAINS SUPPLY!
FEEDER CABLE
DISTRIBUTION PANEL
ELECTRICAL
CONNECTIONS
• HUMIDITY SENSOR
CONNECTION CABLE
• CONTROL PANEL
• CO
2
SENSOR
• LON CONTROLLER
EXHAUST
AIR GOING OUT
OUTDOOR
AIR TO THE
UNIT
SUPPLY AIR
FROM
THE UNIT
EXTRACT
AIR TO
THE UNIT
SUPPLY WATER
TO THE RADIATOR
VALLOX 252 D-L
electrical connections
RETURN WATER
FROM THE RADIATOR
Surface mounting of a controlpanel
A control panel is mounted on
the wall or on a 1-part
instrument box.
Wiring
Width 90
mm
Height
110 mm
Depth
23 mm
Control panel electronics board
1 = orange 1
= +
2 = white 1
= –
3 = orange 2
= A
4 = white 2
= B
5 = metal
=
signal ground
ca. 21 VDC
}
Cable:
NOMAK 2 x 2 x 0.5 mm
2
+ 0.5 mm
2
NOTE!
Faulty coupling of the (+) wire destroys
the control panel!
1 2 3 4 5
+ – A B M
Mounting the control panel
• The control panel comes in a surface-mount box. The control panel can be
mounted on the instrument box or on the wall.
• Connect the control panel as stated in the connection instructions for VALLOX
252 D.
Connection cable type for instance NOMAK 2 x 2 x 0.5mm
2
+0.5mm
2
.
Note! If two or more control panels are mounted, they are connected serially, and they have to be
given different addresses.
