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Operation and maintenance
NEW EcoHeater
DSEH200301.01.EN
Continuous product development may give rise to specification changes without notice.
Inspection
1
1
2
3
WARNING!
High voltage and rotating fan impeller, risk of personal injury.
Working on/servicing the unit
–
Shut down the unit via the ser-
vice switch in the control equipment, then turn the safety switch
to the 0 position and lock it.
WARNING!
Rotating fan impeller, risk of personal injury. Shut down the unit
via the service switch in the control equipment, then turn the
safety switch to the 0 position and lock it. Wait at least 3 minu-
tes before opening inspection doors.
WARNING!
Positive pressure inside the unit, risk of personal injury. Allow
the pressure to drop before you open the inspection doors.
1. Fan and motor are mounted on slide rails. Loosen screws (1), pins/screws (2),
and the earth braid (3) and pull out the fan unit.
2. Check that the fan impeller rotates easily, is in balance and does not vibrate.
Also check that the fan impeller is clean from any accumulation of particles.
Imbalance may be due to a coating or damage to the fan impeller blades.
3. Listen to the sound from the motor bearings. If the bearings are in good
condition, you will hear a slight purring sound. A scraping or pounding sound
may mean that the bearings are damaged and service is then required.
4. Check that the fan impeller is fixed and overlaps the inlet cone.
5. The fan impeller and motor are mounted on a support fitted with rubber anti-
vibration mountings. Check that the anti-vibration mountings are securely
mounted and are intact.
6. Check the mounting screws as well as the suspension devices and support.
7. Check that the gaskets on the connection plates around the connection
openings are intact and firmly fitted.
8. Check that the measurement tubes are securely fitted on each measurement
outlet.
9. Refit the fan unit and earth braid.
1. Screws
2. Pins/screws
3. Earth braid
