SKS4 Steam to Steam Humidifier
Start-up Check List
SKS4-CE Start-up Check List - 180717
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Start-up Procedure
Initial verification and start-up must be carried out by suitably qualified personnel.
It is strictly recommended to follow this start-up procedure in order to avoid any anomaly resulting
from inaccurate installation of the components.
Initial Verification
Clearance
1. Ensure that the humidifier cabinet is installed in a location in which
the humidifier can be serviced correctly.
Electrical
Supply
2. Verify that the power supply (voltage) conforms to the appliance
name plate on the side of the humidifier.
3. Confirm that 24Vac is present between terminals TB4 1&2 on the
printed circuit board.
Water Supply
4. Ensure that water is supplied to the humidifier and that a shutoff
valve is placed outside the humidifier.
5. With the water shutoff valve turned on, check that the drain
connections are connected to the main drain line with sufficient
diameter. Ensure that there are no apparent leaks.
6. Confirm that the drain piping is properly connected with a pitch of at
least 6.5mm per 300mm.
Clean Steam
7. Verify that the steam distributors are properly installed into the
ventilation duct.
8. Verify that the flexible steam hoses and rigid steam supply pipes
are shorter than 5 m in total, are properly sloped and have
condensation “S” traps wherever required.
Raw Steam or
HTHW Supply
9. Confirm that raw steam or HTHW is supplied to the humidifier and
that the supply line is hot upstream the control valve. The pressure
must not exceed 15 PSI (103.4 kPa) for SLP models.
10. Confirm that the shut-off valve located outside the humidifier is
closed. With the shut-off valve turned on, check for leaks or hissing
sounds.
11. When using raw steam supply, verify the type and size of the
condensate return steam trap. The steam trap must be of float type
and of sufficient dimension, according to the capacity.
Controls
12. Ensure that the control valve is properly connected to the output
control signal of the humidifier.
13. Ensure that the Airflow switch is properly installed and connected to
the printed circuit board. If an Airflow switch is not used, verify that
a jumper is connected between terminals TB3 1&2.
14. Ensure that the High limit duct humidistat is properly installed and
connected to the printed circuit board. Verify that the setpoint is
properly adjusted. If a High limit duct humidistat is not used, verify
that a jumper is connected between terminals TB3 1&3.
15. Ensure that the Interlock is properly connected to the printed circuit
board. If the Interlock is not used, verify that a jumper is connected
between terminals TB3 1&4.
16. If a room or duct humidistat is used, verify that it is correctly
installed and properly connected to the humidifier. Verify that the
setpoints are properly adjusted.
17. Turn the power on using the disconnect switch or circuit breaker.
18. Confirm the control set-up of the humidifier and verify that the
setpoints are properly adjusted.
