OSTBERG HERU 400-2400 S, Руководство пользователя

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2017-11-03 Climatix HERU® 400-2400
SERVICE HERU®
Heating coil
The safety switches must be switched off and locked after the unit has been switched off
before starting any service work.
Function
The air heater uses water to heat the supply air to the desired outgoing temperature. The
heater consists of a number of copper pipes with aluminium slats. For circulation and
regulation of the water, the heater is usually equipped with a shunt group. To protect the
heater from freezing, a strap-on frost protection sensor is mounted on the collection pipe.
Check
1. That the front surface of the coil is not dirty.
2. That the pump is running and that the water is circulating and has the correct temperature
for the season.
3. Function of frost protection
4. That the slats are intact (not damaged).
5. That the coil is not damaged and is not leaking.
Corrective action
1. Clean with a vacuum cleaner fitted with a soft brush.
2. Check the pump for damage. Check sensor function.
3. Make sure that the strap-on sensor is correctly positioned. Replace the strap-on sensor if
necessary.
4. Adjust the slats with a “slat comb”.
5. Turn off the water and empty the system through the coil’s drain valve. Change the coil.
Pull out the coil.
1. Turn off the unit via the control panel and place the
main power switch in position 0.
2. Switch off the shunt and close the stop valves.
3. Empty the system through the coil’s drain valve.
4. Remove the coil’s screw caps in the unit.
5. Pull out the coil.