Water Connections; Electrical Connections - Carrier 42N_S Manuel D'installation

Water connections

Water piping can enter either from the loor or from the wall.
Leave the space shown in the igure 21-22. The unit coil can
be supplied with water connections positioned as requested.
However ield conversion of the connections is achieved quite
simply as follows:
Remove the control box panel;
Unscrew the 6 self-threading screws and remove the front
drain pan;
Unscrew the two screws holding the heat exchanger to the
structure, necessary for earthing the coil;
Remove the coil by unhooking it with the rubber tabs and turn
it horizontally through 180°;
Place the coil into its new position by hooking it using the
special rubber tabs;
Reit the front drain pan with the 6 self-threading screws;
Retighten the two screws holding the heat exchanger to the
structure, necessary for earthing the coil (Fig. 23, rif. 8);
Position the control box panel opposite the coil connections;
Place the temperature sensor into its seat and seal with iller
(see ig. 23 - rif. 7);
Position the control into the tabs provided,, blocking it with
the supplied metal plate (see paragraph "Controls");
Change the position of the condensate drain closing plug
of the drain pan and put it on the same side of water
connections.
NOTE: The connection pipes must be insulated with a
condensation-proof material such as polyurethane, propylene
or neoprene of 5 to 10 mm thickness.
NOTE 1: On units with valves already installed, reversal of the
coil can be made by ordering the corresponding valve kit.

Electrical connections

Install the unit according to the national standards on
plants.
Connect L (LINE) ,N (NEUTRAL) e
shown in ig. 27-28-29-30.
The fuses on the mains, as shown in the wiring diagrams, are
those mentioned in table II. These fuses shall be supplied by
installer.
IMPORTANT:
Make earth connection prior to any other electrical
connections.
Disconnect the power supply to all circuits prior to
handling any electrical components.
Remove the control box panel casing by means of the ixing
screw/s.
The power supply connection is of type Y. Only the staf of the
technical assistance department are authorized to replace
24
42N_S 42N_E
(EARTH) power supply as
Automatic water valves
(See ig. 25-26)
The fan coils can be equipped with valves, both in 2-pipe or
4-pipe versions. We recommend using the valves in order to
prevent condensate formation on the unit when the fan is not
working and room humidity is very high.
The valve heads are thermal type with 230V power supply, average
consumption 2,5 VA, maximum operating pressure 1400 kPa.
Opening time depends on the temperature and is from 120 to
240 seconds. The tightness of the connections is ensured by a
rubber sealing (O-ring) inserted in the connection (tightening
torque 30 Nm).
If valves are installed by the installer (accessories), do not forget
to use the (O-ring) sealing ring supplied.
The motorized valves can be 3-way with bypass or 2-way.
Make sure that all unit pipe connections are aligned and well
supported, to prevent abnormal strains on the unit. Check for
leaks after the system has been illed with water. Once water
connections are completed, check for tightness, use nylon
strips to close the shell and insulate the valve and make sure
that all cold parts are properly insulated (ig. 25-26). For 2-way
valve units, close the free space of the insulating shell using
the plug supplied (fog. 26c). Fix the insulating shell using
nylon strips (ig. 26a). Make sure the pipe insulation is correctly
positioned inside the shell (ig. 26a) to prevent condensate on
the pipes. The manufacturer cannot guarantee seal quality and
tightness of the valve group provided by the installer (which is
therefore not factory tested). The manufacturer thus declines
all responsibility for possible malfunction of said items and for
damage resulting from leaks in said items.
WARNING: After the electric control panel has placed on the
opposite side, connect the ground to the unit's frame (see
ig. 23, - rif. 8).
the cable.
According to the installation instructions, the disconnecting
switches from the mains power supply should have a contact
gap (4 mm) such that total disconnection can be ensured
under the conditions provided for by overvoltage class III.
All fan coil connecting cables as well as accessory wires
must be of the H05 VV-F type.
The cables used to connect power supply should be of the
same section indicated in table II.
Use the special cover and the screw or screws previously
removed to close the control box panel after electrical
connections are completed.
CONTROL BOX PANEL: The control box panel is always
positioned opposite the water connections.
Terminal boxes for connections are contained into the control
box panels. (see ig. 27-28-29-30).