Electric Heater - Carrier 42N16 Manuel D'installation Et D'emploi

Electric heater

(See fig.36-37)
Units can be supplied with a factory installed electric heater, or
supplied as a separate kit.
The electric heaters are controlled by type "B" control through an
auxiliary relay located in the plastic electric box panel.
The electric heaters are equipped with two safety thermostats, one
with automatic reset, the second with manual reset, to protect the
unit against overtemperature that may happen in case of incorrect
filter cleaning or obstructions of the air flow.
NOTES:
• The low fan speed on units equipped with a "HIGH POWER"
electric heater has been disabled.
• In case of failure in the electric fan, replace the electric heater too.
Only qualified personnel should carry out this operation.
Maintenance
IMPORTANT:
Disconnect the mains power supply prior to any maintenance
operations or prior to handling any internal parts of the unit.
Air filter
Check and make sure the filter is cleaned every two months or
more often if unit is located in a dusty room.
A dirty filter reduces the air flow and unit efficiency.
To inspect filter proceed as follows:
• switch the unit OFF;
• loosen the two screws located at the base of the unit and the
corresponding plates and the corresponding plates or the rear
closing grille (if installed);
• lower the two guides and withdraw filter (See fig.38)
• clean the filter gently with soapy water or with a vacuum cleaner;
• reinsert and position the filter in the guides, keeping the
photocatalytic filter tabs upwards as illustrated (See fig.39)
• return the filter guides to their original position (See fig.40)
• tighten the screws and associated plates.
It is advisable to clean and if necessary replace the air filter
before the winter season.
T-o access the control box panel, remove the screw located at the
bottom of the cover and delicately bend the tab to remove the cover.
Connect the power supply to the electric heater terminal. Size the
cables according to current drawn (see table III "Technical data of
electric heater).
It is important not to obstruct the supply or air flow and to
periodically check that the filter is clean.
IMPORTANT:
The use of hot water and electric heater together is not
allowed.
If the unit equipped with electric heaters is connected to a hot water
source, the use of a water on-off valve is necessary at the coil input
in order to avoid that the heating element works when water is
circulating. With units equipped with electric heater, the type "B"
control (code 42N9003) specially designed by Carrier is to be used.
Condensate draining
During the summer season check that the condensate drain is free
from dust and lint that could clog it, causing condensate water
overflow.
Heat exchanger coil
At the beginning of any winter and summer season it is advisable to
check that the coil fins are not clogged with dust, lint or other
foreign matter.
Clean the heat exchanger after having removed the supply grille,
taking care not to damage the fins.
Motor
The motor is permanently lubricated.
Therefore no periodical maintenance is required.
42N 23