15
Motor thermal cut-out (TMC)
To protect the fan motor, a
thermal cut-out is installed in
the motor winding. If too much
heat is generated inside the motor,
the circuit is interrupted.
The motor indicator lamp
extinguishes.
Commissioning
Initial commissioning
The initial commissioning of
the units and their forced-air
burners must be carried out by
the manufacturer or another
authorised expert appointed by
him. In doing so, all regulating,
control and safety equipment must
be checked for correct function
and correct settings.
■
The commissioning of oil and
gas-fired units must always
be carried out by authorised
specialist personnel
■
All screws and nuts of the fan
and burner fastening must be
checked for firm seating
■
All air outlet grilles must
be opened and adjusted if
necessary
■
The settings and function of
the controller unit are to be
checked
■
Switch on the local main switch
or fuses/breakers
■
Set the room thermostat
higher than the existing room
temperature
■
Open the fuel supply and
switch the "Heating" selector
switch.
■
The fuel oil or gas flow rate
must be set in accordance with
the heat load of the unit
See unit name plate!
Commissioning the fan motor
Testing the drive
1.
Check the fastening screws
of the entire drive are firmly
seated.
2. Check the pretension of
the drive belt(s).
Measuring the current
consumption
1. To avoid faulty measurements,
open the grilles in the air duct or
the exhaust hood.
All intake or blanking plates
provided are to be mounted on
the unit.
2. Check the mains voltage for
correctness.
3. Carry out the necessary
measurements and adjust the
settings if necessary.
■
Direct start-up
The measured rated current
must not exceed the value
specified on the motor's name
plate.
■
Y/
Δ
−
Start-up
The measured rated current
must not exceed the value
indicated on the motor's name
plate.
NOTE
To exclude measurement
errors, each phase should be
measured separately.
CAUTION
The correct rotating direction
of the fan must be checked.
NOTE
The rated current of the drive
motor must be multiplied by
a factor of 0.58.
Current consumption too high
If the fan motor draws too much
current despite proper electrical
connection and sufficient mains
voltage, the air-side resistors
(intake and outlet side) must be
checked for correct dimensioning.
Implement appropriate measures
to remedy the situation
