Commissioning - Dehutech DT-3500 Technical Manual

Commissioning

On initial start-up, the following steps should be
taken in this order:
1. Ensure that the external isolation switch
is isolating the unit from the mains, and
that the main switch on the
dehumidifier is set in the OFF position.
2. Open the service panel of the
dehumidifier and ensure that no foreign
objects are left inside the unit or in the
electrical compartment
3. Ensure that the process and reactivation
air dampers are open, and that ducts are
clean and free of blockages.
4. Check that air filters are installed and
clean.
5. Rotate the fan impellers by hand and
make sure they can move freely.
6. Ensure that the mains supply fuse is
suitably rated.
7. Compare set values for motor circuit
breakers with correct values in electrical
wiring diagram in appendix 1.
8. Connect the dehumidifier to the main
electrical supply by turning the isolation
switch to ON, and check all three phases
are live. Terminal L1, L2, L3 in the
dehumidifier.
9. Check to see that the lamp called STAND
BY is lighting up, but that the machine
doesn't start.
10. Start the dehumidifier for a short
moment (3-4 seconds) by turning the
main switch to the MAN position. While
in operation, check that the rotor is
slowly turning in the right direction, and
the green operation lamp lights up.
© 2016 DehuTech AB - Subject to change without notice
Stop the dehumidifier by turning the
main switch to 0, and check the
direction of rotation for the fans.
11. Mount the service panels and ensure
they seal properly to the casing.
12. The dehumidifier is now ready for
operation.
13. Start the dehumidifier and check that
the unit is operating at the correct air
volumes by taking measurements in the
ducts. Always check the airflows on the
overpressure side of the dehumidifier
(dry air duct and wet air duct).
14. If requested check the dehumidification
performance by measuring humidity in
the dry air outlet from the dehumidifier.
Compare the result with the
performance chart on page 13.
DT-3500 - 8