Mitsubishi Electric VL-250CZPVU-R-E Installation Manual page 19

WARNING
Make sure to install safety devices that do not have self-return functions on the duct heaters (supply air preheaters,
supply air after-heaters). Do not supply the duct heaters with electricity directly from the product.
Failure to heed this warning may result in fire.
When using duct heaters (supply air preheaters, supply air after-heaters) that do not have temperature control
functions, select duct heaters that have the appropriate capacity according to the airflow passing through the heaters.
Failure to heed this warning may result in fire because the heaters will overheat if the airflow is too little compared to the
capacity of heaters.
CAUTION
Place the duct heaters (supply air preheaters, supply air after-heaters) at least 2 m from the product.
Failure to heed this warning may cause damage on the product due to the preheating from the heaters.
Note
- S elect duct heaters (supply air preheaters, supply air after-heaters) based on the laws, regulations, and standards of the
local government. Select duct heaters that have the CE marking.
- I nstall the earth leakage breakers of the duct heaters (supply air preheaters, supply air after-heaters) in line with the related
laws, regulations, and standards.
- D o not use duct heaters (supply air preheaters, supply air after-heaters) outside the set air volume.
- I f the heater capacities are too large, the heaters may switch ON/OFF frequently.
- I f the heater capacities are too small, the air may not be heated.
- M ake sure to check the operation at a commissioning after checking that the duct heaters (supply air preheaters, supply air
after-heaters) and the product are electrically connected and that the product functions are set.
- I f the ventilation mode is set to Auto while preheating functions are used on the duct heaters (supply air preheaters, supply
air after-heaters), the operation may be set to the bypass ventilation operation.
- W hen the product is interlocked with air conditioners (Mr. Slim), the supply air operation and the output of the supply air
preheaters are stopped while the air conditioners are deforesting.
- In the following cases, some Error code is displayed on the «Error information» screen.
- And malfunction monitor signal is output.
- OA thermistor detects higher than 15°C within 15 minutes after the heater output starts.
- OA thermistor detects -10°C or lower, 60 minutes after the heater output starts.
Eng-19