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CS.VTR.IST-1 / Rev 1.2
ELECTRICAL CONNECTION
The electric connection must only be performed by qualified staff, in compliance with all general and local safety standards.
Check that the power supply voltage and frequency correspond to 220V – 50 Hz.
The appliance's safety is ensured when it is properly connected to an efficient earthing system.
In the electric connection to the mains power supply, include a 6 A – Id 30 mA differential trip-switch with suitable breaking load. The electric connections,
including the earth connection, must be made after shutting off the electrical system.
When completing the system, bear in mind that the cables must be laid in an unmovable manner and far from parts subject to high temperatures. During
the final wiring of the circuit, only use components with a suitable electrical protection rating. Do not pass electric cables in the immediate vicinity of the
flue gas pipe, unless they are insulated with suitable materials.
NORDIC FIRE declines all responsibility for injury to persons and animals or damage to objects due to failure to connect the appliance to earth
or to comply with IEC specifications.
Connection to the room thermostat or a room temperature sensor
On the back of the appliance there are one or more terminal boards which are used to connect the room thermostat or room temperature sensor (see
"Components of the appliance")
The table below describes the functions of the terminals on the rear panel of the appliance.
Terminal
Description
1
Main room
Ducted room 1
(present only on
2
models with one or
two ducted outlets)
Ducted room 2
(present only on
3
models with two
ducted outlets)
* Connect a room thermostat with no power to manage a simple clean contact, preferably with a hysteresis value that can be calibrated.
** Connect a type "NTC 10K ± 1%" room sensor.
Type of control
Only with room Thermostat *
With room Thermostat *
(Pr56 must be enabled with
value T1 or T1+2)
With Room sensor **
(Pr56 must be enabled with
value S1 or S1+2)
With room Thermostat *
(Pr56 must be enabled with
value T2 or T1+2)
With Room sensor **
(Pr56 must be enabled with
value S2 or S1+2)
Action
With the contact CLOSED the appliance will continue to operate at the set
power, independently of the SET ROOM (key 1) setting and the status of any
other connected thermostats or temperature sensors.
With the contact OPEN the appliance will switch to modulation mode as long
as the room temperature set in the SET ROOM (key 1) setting is satisfied and
any other connected thermostats or temperature sensors are satisfied.
With the contact CLOSED the appliance will continue to operate at the set
power, independently of the SET ROOM (key 1) setting and the status of any
other connected thermostats.
With the contact OPEN the appliance will switch to modulation mode as long
as the room temperature set in the SET ROOM (key 1) setting is satisfied and
any other connected thermostats are satisfied.
Ducted fan 1 will switch to modulation mode in any case.
Once the SET ROOM 1 temperature setting is reached (Menu 12-SET AMB.
CAN.), the appliance will switch to modulation mode as long as the room
temperature set in the SET ROOM (key 1) setting is satisfied and any other
connected thermostats or temperature sensors are satisfied.
Ducted fan 1 will switch to modulation mode in any case.
With the contact CLOSED the appliance will continue to operate at the set
power, independently of the SET ROOM (key 1) setting and the status of any
other connected thermostats.
With the contact OPEN the appliance will switch to modulation mode as long
as the room temperature set in the SET ROOM (key 1) setting is satisfied and
any other connected thermostats are satisfied.
Ducted fan 2 will switch to modulation mode in any case.
Once the SET ROOM 2 temperature setting is reached (Menu 12-SET ROOM.
CAN.), the appliance will switch to modulation mode as long as the room
temperature set in the SET ROOM (key 1) setting is satisfied and any other
connected thermostats or temperature sensors are satisfied.
Ducted fan 2 will switch to modulation mode in any case.
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