VALLOX 252 M
MOUNTING INSTRUCTIONS
17
VALLOXs Electrical Connections
• The unit is connected permanently to the electrical power network. The connection
box is located inside the unit, next to the extract air duct outlet.
• The cables to be connected are led to the unit through the sleeves with draught-
limiters and the cable sleeves located beside the extract 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 fasten 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.
Installation of the Manual Control Unit
• The control panel that comes with the unit is in a surface mounting case. The
manual control unit can also be flush mounted in a double gang box (U 17.2
ENSTO).
• The manual control unit cannot be used in connection with remote monitoring
control.
Connection to Remote Monitoring
• The ventilation unit is connected to remote monitoring according to the wiring
diagrams attached.
• The manual control unit cannot be used in connection with remote monitoring control.
Selection of Control Voltages for Capacity Modes (Min., 1/2 and Max.)
BEFORE SELECTING CONTROL VOLTAGES, MAKE SURE THAT THE UNIT HAS BEEN DISCONNECTED
FROM THE MAINS SUPPLY!
• If needed, the factory settings for adjusting fan capacity modes (Min., 1/2 and
Max.) can be modified.
• The factory setting for the Min. mode control voltage is 90V. You can modify the
control voltage by moving the conductor between contact 13 of the K2 contactor
and the transformer to the desired voltage (100V, 110V, 130V, 140V, 160V,
200V, and 230V).
• The factory setting for the 1/2 mode control voltage is 140V. You can change the
control voltage by moving the conductor between contact 14 of the K3 contactor
and the transformer to the desired voltage (90V, 100V, 110V, 130V, 160V,
200V, and 230V).
• The factory setting for the Max. mode control voltage is 230V. You can change the
control voltage by moving the conductor between contact 13 of the K1 contactor
and the transformer to the desired voltage (90V, 100V, 110V, 130V, 140V,
160V, and 200V).
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
CONNECTION CABLE
• Remote monitoring
• Manual control
CONNECTION CABLE
• Duct damper motor
OUTDOOR
AIR TO THE
UNIT
EXTRACT AIR
GOING OUT
SUPPLY AIR
FROM THE
UNIT
DISCHARGE
AIR TO THE
UNIT
SUPPLY WATER
TO THE
RADIATOR
VALLOX 252 M-L
ELECTRICAL
CONNECETIONS
RETURN WATER
FROM THE
RADIATOR
Manual control unit