enervent LTR-3 Series, Planning, Installation And Operation Instructions

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Instructions for installing the duct heaters E09KP-016 and E18KP-016 in circular ducts. 
 
NB! Read these instructions before installing and connecting the duct heaters. 
 
1. The duct heaters are designed to operate on single phase alternating current. See the 
wiring diagram for the particular heater and the electrical data on the rating plate placed on 
the cover of the duct heater. 
 
2. The duct heater must be connected to the mains supply with a fixed installed round 
cable. The heater must be equipped with a cable grommet or cable fitting designed for the 
cable, which ensures that the electrical protection class of the heater is retained. The 
standard design is IP43. Electrical protection class IP55 can be delivered if required, in 
which case this is specified on the cover of the heater. Design IP55 is delivered with 
factory-mounted cable fittings. 
 
3. It must not be possible to switch on the power to the element unless the fan has started 
earlier or starts simultaneously. 
 
4. It must not be possible to switch off the power to the fan unless the power to the 
element has been switched off earlier or is switched off simultaneously. 
 
5. An all phase breaker with a contact gap of at least 3 mm must be included in the fixed 
installation. 
 
6. The installation must be carried out by an authorized electrical fitter. 
 
7. The duct heaters are designed in accordance with the following standards: 
SEMKO 111 FA 1982 / EN 60335-1 / EN 60335-2-30. 
 
8. The duct heater satisfy the requirements of the currently valid EMC standard CENELEC 
EN 50081-1 and EN 50082-1. The heaters are CE-marked and EMC-marked. 
 
9. The duct heaters are S-marked, tested and approved by SEMKO. 
 
10. The duct heater is equipped with two overheating cut-outs (one with manual reset) 
designed to prevent overheating when the airflow is too low or in the event of a fault in the 
system. 
 
11. A drawing must be attached inside the fuse box or on the wall of the service room. The 
drawing shows the rating of the duct heaters and their location in the building, together 
with information about the measures to be taken in the event that the overheat 
protection cut-out(s) is activated. 

INSTRUCTIONS FOR THE DUCT HEATER