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Installation and Operating Instructions
EN
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WARNING
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WARNING
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ATTENTION
ATTENTION
NOTE
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DANGER
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Central ventilation unit – KWL 890 W/W ET
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Risk of injury due to the panel or unit door falling down!
The panel or unit door can fall down when removing and cause serious injuries.
> Wear protective footwear.
> Carefully remove the panel or unit door with both hands.
1. Open upper unit door (see chapter 9.1.1 on page 28 ff).
2. Remove extract air filter and supply air filter.
3. Remove filter grille.
4. Move upper terminal strip to the side.
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Risk of injury due to the high weight of the heat exchanger!
The heat exchanger can fall down and cause serious injuries when removed from the unit.
> Wear protective footwear.
> Carefully remove the heat exchanger from the unit with both hands.
Damage to the heat exchanger !
The slats can be damaged.
> Only hold the heat exchanger by the housing.
5. Lift the heat exchanger and carefully pull it out of the unit.
Damage to the heat exchanger due to the use of aggressive cleaning agents.
Aggressive cleaning agents can damage the heat exchanger.
> Do not use aggressive cleaning agents.
6. Carefully clean the heat exchanger with a vacuum cleaner with a brush nozzle or with water.
7. Raise the heat exchanger and carefully push it into the unit.
8. During installation, place the heat exchanger on the guide rail and push up to the stop. Ensure that the receptacle
seals are not damaged!
9. Clamp the upper terminal strip of the heat exchanger.
10. Insert filter grille.
11. Insert supply air filter.
12. Insert extract air filter.
13. Close upper unit door (see chapter 9.1.1 on page 28ff).
9.4
Condensate drain maintenance
Both condensate drains must be checked for functionality and, if necessary, replaced as needed and at least every 6
months.
Carry out functional inspection as follows:
Loosen the mounting base cover using the two hexagon socket screws (see chapter 4.2, Fig. 10 on page 11).
1. Disassemble the heat exchanger (see chapter 9.3.2 on page 28).
2. Carefully pour some water into the condensation tray with a watering can.
3. Check whether the water drains via the condensate hose and clean the condensate drain, if necessary.
4. For assembly see chapter 9.3.2 on page 28.
If the water does not drain away:
1. Dismantle siphon.
Reverse order of installation, see chapter 4.2 „Install ball siphon", page 10.
2. Clean siphon with water.
3. Re-install siphon, see chapter 4.2 „Install ball siphon", page 10.
9.5
Standstill and disposal
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Danger to life due to electric shock
When dismantling, live parts can be exposed, which can result in electric shock if touched. Before dismant-
ling, isolate the unit from the mains power supply and protect against being switching on again!
Parts and components of the unit, whose service life has expired, e.g. due to wear and tear, corrosion, mechanical
load, fatigue and/or other effects that cannot be directly discerned, must be disposed of expertly and properly after
disassembly in accordance with the national and international laws and regulations. The same also applies to auxiliary
materials in use. Such as oils and greases or other substances. The intended and unintended further use of worn parts,
e.g. impellers, rolling bearings, filters, etc. can result in danger to persons, the environment as well as machines and
systems. The corresponding operator guidelines applicable on-site must be observed and used.
Please think of the environment, you can make a significant contribution to the environmental protection by returning
batteries and accumulators!
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